Tech-dat/Imperial-dat/Imperial-dat.md
... ...
@@ -0,0 +1,26 @@
1
+# Imperial-dat
2
+
3
+- [[wheel-dat]]
4
+
5
+Eight inches (8 cun) in diameter ≈ about 24 cm
6
+
7
+Conversion methods:
8
+
9
+1 cun (Chinese market unit) = 3.33 cm
10
+
11
+So 8 cun × 3.33 cm ≈ 26.6 cm
12
+
13
+But in daily products (such as cakes, speakers, fans), the commonly used "cun" is actually the inch:
14
+
15
+1 inch = 2.54 cm
16
+
17
+**8 inches in diameter = 8 × 2.54 = 20.32 cm**
18
+
19
+
20
+125 mm == 英寸（inch） 约 4.9 寸（≈ 5 寸）
21
+
22
+
23
+
24
+## ref
25
+
26
+- [[unit-dat]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/BLDC-motor-dat/BLDC-motor-dat.md
... ...
@@ -1,90 +0,0 @@
1
-
2
-# BLDC-motor-dat
3
-
4
-- [[ESC-dat]] - [[motor-driver-dat]]
5
-
6
-## specs
7
-
8
-- sensored / sensorless
9
-- outrunner / inrunner
10
-- brushless / brushed
11
-
12
-- Advanced ESCs use **Field-Oriented Control (FOC)** or **sensored feedback** for smooth torque at low RPM, perfect for crawlers.
13
-
14
-
15
-## types
16
-
17
-- 3525
18
-- 3650
19
-- 3660
20
-- 4274
21
-
22
-
23
-
24
-
25
-## specs
26
-
27
-| Feature | Details |
28
-| -------------- | --------------------------------------------- |
29
-| **Power** | 500W – 3000W+ (easily scalable) |
30
-| **Voltage** | 24V – 72V (often used with Li-ion or LiFePO4) |
31
-| **Torque** | Higher torque with good efficiency |
32
-| **Efficiency** | 80–90% (vs 60–70% for brushed) |
33
-| **Lifespan** | Much longer (no brushes = low wear) |
34
-| **Control** | Needs ESC (Electronic Speed Controller) |
35
-
36
-
37
-
38
-BLDC stands for Brushless DC Motor. It is a type of electric motor that operates without brushes, unlike traditional brushed DC motors. BLDC motors are more efficient, durable, and generate less noise because they use electronic commutation instead of mechanical brushes.
39
-
40
-Key Features of BLDC Motors:
41
-
42
-- Higher Efficiency: Less energy loss compared to brushed motors.
43
-- Longer Lifespan: No brushes mean less wear and tear.
44
-- Low Maintenance: No brush replacements needed.
45
-- Better Speed Control: Precise control using electronic circuits.
46
-- Less Heat & Noise: Smooth operation with minimal friction.
47
-
48
-Common Applications:
49
-
50
-- Electric Vehicles (EVs)
51
-- Drones
52
-- Cooling Fans
53
-- Air Conditioners
54
-- Power Tools
55
-- Industrial Automation
56
-
57
-
58
-
59
-## BLDC motor with Hall sensors
60
-
61
-
62
-### Hall Sensor Brushless Motor (有感无刷有霍尔马达)
63
-
64
-A "**Hall Sensor Brushless Motor**" (有感无刷有霍尔马达) refers to a **BLDC motor with Hall sensors**, also known as a **sensored BLDC motor**.
65
-
66
-#### Explanation
67
-- **Brushless (BLDC):** The motor operates without carbon brushes, using electronic commutation, making it more durable and efficient than brushed motors.
68
-- **Sensored (Hall Sensors):** The motor has **Hall effect sensors** that detect the rotor's position, enabling precise commutation signals. This ensures **smooth operation, better torque control, and easier startup** compared to sensorless BLDC motors.
69
-
70
-#### Comparison: Sensored vs. Sensorless BLDC Motors
71
-
72
-| **Type** | **Sensored BLDC (With Hall Sensors)** | **Sensorless BLDC (Without Hall Sensors)** |
73
-|---------|----------------------------------|---------------------------------|
74
-| **Startup Performance** | Smooth startup, stable at low speeds | Difficult startup, vibrations at low speed |
75
-| **Control Complexity** | Easier control, good for high-load applications | Requires advanced algorithms |
76
-| **Common Applications** | E-bikes, electric scooters, industrial tools | High-speed, low-load applications like drones & fans |
77
-
78
-#### Typical Applications
79
-
80
-- **Electric Vehicles (E-bikes, E-scooters):** Requires smooth low-speed control and high torque.
81
-- **Industrial Automation:** Used in robotics, CNC machines, and power tools.
82
-- **Home Appliances:** Found in inverter air conditioners and high-end fans.
83
-
84
-- [[sensor-hall-dat]]
85
-
86
-## ref
87
-
88
-- [[motor-dat]]
89
-
90
-- [[BLDC]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/Drum-brake-motor-dat/Drum-brake-motor-dat.md
... ...
@@ -1,3 +0,0 @@
1
-
2
-# Drum-brake-motor-dat
3
-
Tech-dat/acturator-dat/motor-dat/motor-BLDC-dat/motor-BLDC-dat.md
... ...
@@ -0,0 +1,105 @@
1
+
2
+# BLDC-motor-dat
3
+
4
+- [[ESC-dat]] - [[motor-driver-dat]]
5
+
6
+- [[Imperial-dat]]
7
+
8
+
9
+
10
+## control methods
11
+
12
+- [[ESC-dat]]
13
+
14
+- [[sensor-hall-dat]]
15
+
16
+- [[simpleFOC-dat]]
17
+
18
+- [[FOC-dat]]
19
+
20
+
21
+## specs
22
+
23
+- sensored / sensorless
24
+- outrunner / inrunner
25
+- brushless / brushed
26
+
27
+- Advanced ESCs use **Field-Oriented Control (FOC)** or **sensored feedback** for smooth torque at low RPM, perfect for crawlers.
28
+
29
+
30
+## types
31
+
32
+- 3525
33
+- 3650
34
+- 3660
35
+- 4274
36
+
37
+
38
+
39
+
40
+## specs
41
+
42
+| Feature | Details |
43
+| -------------- | --------------------------------------------- |
44
+| **Power** | 500W – 3000W+ (easily scalable) |
45
+| **Voltage** | 24V – 72V (often used with Li-ion or LiFePO4) |
46
+| **Torque** | Higher torque with good efficiency |
47
+| **Efficiency** | 80–90% (vs 60–70% for brushed) |
48
+| **Lifespan** | Much longer (no brushes = low wear) |
49
+| **Control** | Needs ESC (Electronic Speed Controller) |
50
+
51
+
52
+
53
+BLDC stands for Brushless DC Motor. It is a type of electric motor that operates without brushes, unlike traditional brushed DC motors. BLDC motors are more efficient, durable, and generate less noise because they use electronic commutation instead of mechanical brushes.
54
+
55
+Key Features of BLDC Motors:
56
+
57
+- Higher Efficiency: Less energy loss compared to brushed motors.
58
+- Longer Lifespan: No brushes mean less wear and tear.
59
+- Low Maintenance: No brush replacements needed.
60
+- Better Speed Control: Precise control using electronic circuits.
61
+- Less Heat & Noise: Smooth operation with minimal friction.
62
+
63
+Common Applications:
64
+
65
+- Electric Vehicles (EVs)
66
+- Drones
67
+- Cooling Fans
68
+- Air Conditioners
69
+- Power Tools
70
+- Industrial Automation
71
+
72
+
73
+
74
+## BLDC motor with Hall sensors
75
+
76
+
77
+### Hall Sensor Brushless Motor (有感无刷有霍尔马达)
78
+
79
+A "**Hall Sensor Brushless Motor**" (有感无刷有霍尔马达) refers to a **BLDC motor with Hall sensors**, also known as a **sensored BLDC motor**.
80
+
81
+#### Explanation
82
+- **Brushless (BLDC):** The motor operates without carbon brushes, using electronic commutation, making it more durable and efficient than brushed motors.
83
+- **Sensored (Hall Sensors):** The motor has **Hall effect sensors** that detect the rotor's position, enabling precise commutation signals. This ensures **smooth operation, better torque control, and easier startup** compared to sensorless BLDC motors.
84
+
85
+#### Comparison: Sensored vs. Sensorless BLDC Motors
86
+
87
+| **Type** | **Sensored BLDC (With Hall Sensors)** | **Sensorless BLDC (Without Hall Sensors)** |
88
+|---------|----------------------------------|---------------------------------|
89
+| **Startup Performance** | Smooth startup, stable at low speeds | Difficult startup, vibrations at low speed |
90
+| **Control Complexity** | Easier control, good for high-load applications | Requires advanced algorithms |
91
+| **Common Applications** | E-bikes, electric scooters, industrial tools | High-speed, low-load applications like drones & fans |
92
+
93
+#### Typical Applications
94
+
95
+- **Electric Vehicles (E-bikes, E-scooters):** Requires smooth low-speed control and high torque.
96
+- **Industrial Automation:** Used in robotics, CNC machines, and power tools.
97
+- **Home Appliances:** Found in inverter air conditioners and high-end fans.
98
+
99
+- [[sensor-hall-dat]]
100
+
101
+## ref
102
+
103
+- [[motor-dat]]
104
+
105
+- [[BLDC]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-BLDC-dat/motor-three-phase-BLDC-dat/motor-three-phase-BLDC-dat.md
... ...
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1
+# Three-Phase BLDC Motor Data
2
+
3
+The common three thick motor wires (yellow, green, blue) found on electric scooters are actually:
4
+
5
+## ✅ Brushless DC Motor (BLDC) or Permanent Magnet Synchronous Motor (PMSM)
6
+
7
+Also known as:
8
+
9
+- Three-phase brushless motor
10
+- Hub Motor
11
+- Brushless DC Motor
12
+
13
+These three wires are the motor's three-phase power lines, used by the controller to drive the motor's rotation.
14
+
15
+## 🔍 Structure Features of Three-Wire Motors in Electric Scooters
16
+
17
+### 1️⃣ Three-phase windings (U / V / W phases)
18
+
19
+The usual colors are: yellow, green, blue
20
+
21
+These three phases are commutated in sequence to make the motor spin.
22
+
23
+### 2️⃣ Permanent magnet rotor (magnets inside the wheel)
24
+
25
+The center is the rotor (with magnets).
26
+
27
+Bicycles and scooters both use hub-type structures.
28
+
29
+### 3️⃣ Stator on the outer ring of the coil
30
+
31
+The motor is an outer rotor structure (the shell rotates).
32
+
33
+The stationary part is inside the coil.
34
+
35
+## ⚡ Why are there only three thick wires? Isn't that too few?
36
+
37
+It's not too few, because:
38
+
39
+These three wires are the power wires.
40
+
41
+Some motors also have Hall sensors (5 thin wires).
42
+
43
+Electric scooters usually have two types:
44
+
45
+| Type | Number of Wires | Features |
46
+|---------------------|------------------------|------------------------------------------|
47
+| Sensorless BLDC | Only 3 thick wires | Starts by induction, more vibration at low speed |
48
+| With Hall PMSM/BLDC | 3 thick + 5 thin wires | Smooth start, suitable for FOC control |
49
+
50
+## 🛴 Why do electric scooters use three-phase brushless motors?
51
+
52
+Because the advantages are obvious:
53
+
54
+- High torque
55
+- High efficiency
56
+- Silent operation
57
+- Maintenance-free (brushless, no wear)
58
+- Simple structure (directly integrated in the wheel)
59
+
60
+Almost all modern scooters (Xiaomi, Ninebot, Kaabo, etc.) use this type.
61
+
62
+
63
+## ref
64
+
65
+- [[motor-BLDC-dat]] - [[motor-hub-dat]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-FPV-dat/EX1103-dat/EX1103-dat.md
... ...
@@ -1,99 +0,0 @@
1
-
2
-# EX1103-dat
3
-
4
-- Mode: EX1103
5
-- KV options: 6000KV 7000KV 8000KV 12000KV
6
-- Configu-ration:9N12P
7
-- Stator Diamter:11mm
8
-- Stator Length:3mm
9
-- Shaft Diameter: Φ1.5mm
10
-- Motor Dimension(Dia.*Len):Φ13.5mm*16mm
11
-- Weight(g):3.7g
12
-- No. of Cells(Lipo):
13
-- 6000KV support 3-4S
14
-- 7000KV support 2-3S original motors for Larva X
15
-- 8000KV support 2-3S
16
-- 12000KV support 1-2S
17
-
18
-
19
-- EX1103-12000
20
-- 0.44A
21
-- 24750RPM
22
-- 65mm bi-blades
23
-
24
-- [[Thrust-dat]]
25
-
26
-| Voltage (V) | Throttle (%) | Thrust (g) | Power (W) | Efficiency (g/W) | RPM |
27
-|-------------|--------------|------------|-----------|------------------|------|
28
-| 7.4 | 1 | 22.5 | 7.4 | 3.041 | 1298 |
29
-| 7.4 | 2 | 40 | 14.8 | 2.703 | 1425 |
30
-| 7.4 | 3 | 58.4 | 22.2 | 2.631 | 1554 |
31
-| 7.4 | 4 | 72.3 | 29.6 | 2.443 | 1649 |
32
-| 7.4 | 5 | 87.6 | 37 | 2.368 | 1750 |
33
-| 7.4 | 6 | 98.6 | 44.4 | 2.221 | 1830 |
34
-| 7.4 | 7 | 109.3 | 51.8 | 2.110 | 1918 |
35
-| 7.4 | 8 | 119.9 | 59.2 | 2.025 | 1988 |
36
-| 7.4 | 8.3 | 121.2 | 61.42 | 1.973 | 2200 |
37
-
38
-
39
-
40
-## Can EX1103 run with 96 kHz ESC PWM?
41
-
42
-
43
-Short answer: Yes — the EX1103 motor itself can run while the ESC is switching at 96 kHz, but whether you should run 96 kHz depends entirely on your ESC hardware and firmware and the resulting ESC switching losses / heating. Below are the practical reasons, recommendations, and a safe test procedure.
44
-
45
-
46
-### 1) Motor side
47
-- Small brushless motors (1103 size) are electrically simple and **will run** with high PWM switching rates.
48
-- Higher PWM gives smoother torque and quieter operation at low RPMs.
49
-
50
-### 2) ESC side (the limiting factor)
51
-- **ESC hardware + firmware** must support 96 kHz (BLHeli_32 or BLHeli_S with Bluejay can provide higher frequencies).
52
-- Higher PWM = much higher switching frequency for the MOSFETs → **more switching losses** → ESC gets hotter and may fail if it’s not designed for it.
53
-- On tiny whoop ESCs (very small boards), 96 kHz often causes significantly higher ESC temps; some tiny ESCs only safely handle up to 48 kHz.
54
-
55
-### 3) Practical verdict
56
-- **Motor: OK.**
57
-- **ESC: maybe** — only if ESC hardware & firmware explicitly support 96 kHz and you verify temperatures are safe.
58
-- **Recommended default:** try **48 kHz** first (good balance). Move to 96 kHz only if ESC is known to handle it and bench tests pass.
59
-
60
-### Safe test procedure to verify 96 kHz on your stack
61
-
62
-1. **Check ESC firmware & hardware**
63
- - If you have BLHeliSuite32, check available PWM options.
64
- - If BLHeli_S, consider Bluejay to unlock higher frequencies (only if your ESC is compatible).
65
-
66
-2. **Set conservative limits**
67
- - Limit max throttle to ~80% for the first tests (use throttle cut or governor).
68
- - Reduce flight-time/hover duration for initial tests.
69
-
70
-3. **Bench test (props off or props on with restraint)**
71
- - Arm and run at varying throttle pulses (hover-ish and full throttle bursts).
72
- - Monitor ESC temperature and motor temperature after 30–60 seconds bursts.
73
-
74
-4. **Acceptable temperature thresholds (practical guidance)**
75
- - **ESC temp:** keep **below ~80°C** ideally; if it climbs toward 90–100°C, it's unsafe.
76
- - **Motor temp:** keep **below ~70°C** for small motors; <60°C is better.
77
- - If temps rise quickly, stop and drop PWM to 48 kHz or 24 kHz.
78
-
79
-5. **Flight test**
80
- - Short, conservative indoor flights; watch for ESC heating, desyncs, reduced thrust, or smoke.
81
- - If you see any sign of ESC stress (thermal cut, brownouts, smoke), revert immediately.
82
-
83
-6. **Telemetry / logs**
84
- - Use any ESC telemetry (current, voltage, temp) to evaluate switching losses.
85
- - Check motor RPM and efficiency—if thrust drops or current skyrockets, higher PWM may be harmful.
86
-
87
-### Additional notes
88
-- High-KV motors (e.g., 12,000KV) spin very fast on 1–2S — higher PWM helps smooth low-speed control but brings less benefit at very high RPMs while still stressing ESCs.
89
-- For cine / smooth indoor whoop flying, many pilots prefer **48 kHz** (smooth + safer). Use 96 kHz only if your ESC is proven to handle it on your exact build.
90
-
91
-### Short recommendation
92
-- **Try 48 kHz first.** If you want to experiment with **96 kHz**, ensure your ESC firmware/hardware supports it and do careful bench/temperature tests. If the ESC runs cool and performance improves, you’re good; if it heats up, drop back down.
93
-
94
-
95
-## ref
96
-
97
-CW【黑线带红点】,CCW【黑线不带红点】
98
-
99
-- [[motor-FPV-dat]] - [[ex1103]] - [[motor-fpv]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-FPV-dat/Thrust-dat/Thrust-dat.md
... ...
@@ -1,18 +0,0 @@
1
-
2
-# Thrust-dat
3
-
4
-A bit of math:
5
-
6
-Mobula motors + props making around 90-100g of thrust at 50%
7
-
8
-Mobula8 weight around 110g with battery 550 mah An ok-ish ratio of thrust to weight is 4:1
9
-
10
-Thrust/(camweight+drone weight)
11
-
12
-400 / (16+110)= 3.17...
13
-
14
-Hence to have a proper flight you'll have to be above 50% throttle most of the time.
15
-
16
-It might fly pretty stable with proper PID tuning and filtering but your batteries will burn (maybe even literally)
17
-
18
-https://www.reddit.com/r/TinyWhoop/comments/1cw9xm4/mobula_8thumb_pro_any_tricks_for_decent_cinematic/
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-FPV-dat/motor-FPV-dat.md
... ...
@@ -1,91 +0,0 @@
1
-
2
-# FPV-motor-dat
3
-
4
-- [[motor-dat]]
5
-
6
-- [[motor-coreless-dat]] - [[propeller-dat]]
7
-
8
-- 1x 1504 2300KV (4 mounting holes)
9
-- 4x 1504 2300KV a set (4 mounting holes)
10
-- 4x 1504 2300KV + insurance a set (4 mounting holes)
11
-
12
-- 1x 1504 3600KV (4 mounting holes)
13
-- 4x 1504 3600KV a set (4 mounting holes)
14
-- 4x 1504 3600KV + insurance a set (4 mounting holes)
15
-
16
-- 1x 1504 3800KV (3 mounting holes)
17
-- 4x 1504 3800KV a set (3 mounting holes)
18
-- 4x 1504 3800KV + insurance a set (3 mounting holes)
19
-
20
-
21
-- [Benefits [and down sides] of HIGHER PWM Frequency! 🙀💪](https://www.youtube.com/watch?v=v3806Incpvo)
22
-
23
-
24
-
25
-## How to Reverse a 3-Wire Brushless Motor
26
-
27
-### 1. Identify the motor wires
28
-
29
-- Typically **3 wires** connected to ESC
30
-- Colors may vary → A, B, C (or random colors)
31
-
32
----
33
-
34
-### 2. Swap any **two wires**
35
-
36
-- Example: swap **A and B**, leave C unchanged
37
-- This reverses motor rotation direction
38
-
39
-
40
-
41
-
42
-## how to prevent motor burning
43
-
44
-- Don’t run **96 kHz** unless you’re sure your ESC can handle it.
45
-- Set **Motor Idle Throttle ~6%** to prevent stalling.
46
-- Keep an eye on **motor temperature after indoor flights** (touch test). Warm = ok, too hot to touch = dangerous.
47
-- Avoid flying with props bent / rubbing ducts indoors (adds load).
48
-
49
-## What Does 1400KV Mean in an FPV Motor?
50
-
51
-In FPV drones, **KV** is a motor specification that indicates the motor’s speed constant.
52
-
53
----
54
-
55
-### ⚡ Definition of KV
56
-- **KV (RPM/Volt)** = How many **Revolutions Per Minute (RPM)** the motor will spin **per 1 Volt applied**, without any load (no propeller).
57
-
58
-For example:
59
-- A **1400KV motor** spins **1400 RPM per Volt**.
60
-- If powered by a **4S LiPo (14.8 V)**:
61
-
62
- 1400 KV × 14.8 V ≈ 20,720 RPM (no load)
63
-
64
-### 🔧 What It Means in Practice
65
-
66
-1. **Lower KV (e.g., 1400KV)**
67
- - Spins slower per volt.
68
- - Provides more **torque** (good for larger props, longer flight times, heavy drones, cinewhoops).
69
- - Better for **efficiency** and carrying loads.
70
-
71
-2. **Higher KV (e.g., 2800KV, 4000KV)**
72
- - Spins faster per volt.
73
- - Provides less torque, but more **speed**.
74
- - Good for **small props, racing, and high agility**.
75
-
76
----
77
-
78
-### 🛠️ Typical Use Cases
79
-- **1400KV motors** are usually found on:
80
-- **Cinewhoops** with 3–5 inch props.
81
-- **Long-range FPV drones** where efficiency and endurance matter.
82
-- Drones designed to carry heavier cameras (e.g., GoPro).
83
-
84
----
85
-
86
-### ✅ **Summary**:
87
-A **1400KV FPV motor** means the motor spins about **1400 RPM per volt** (unloaded). It is a **low-KV motor** designed for **larger props, more torque, and efficiency**, rather than raw speed.
88
-
89
-## ref
90
-
91
-- [[FPV]] - [[FPV-motor]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-PMSM-dat/motor-PMSM-dat.md
... ...
@@ -0,0 +1,4 @@
1
+
2
+# motor-PMSM-dat
3
+
4
+永磁同步电机（PMSM）
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-Drum-brake-dat/motor-Drum-brake-dat.md
... ...
@@ -0,0 +1,16 @@
1
+
2
+# Drum-brake-motor-dat
3
+
4
+A drum-brake motor is an electric motor that has a built-in electromagnetic brake.
5
+The brake is shaped like a drum, similar to how drum brakes work on cars.
6
+
7
+⭐ Key idea
8
+
9
+When the motor loses power, the brake automatically locks, stopping the motor shaft from rotating.
10
+
11
+When the motor is powered, the brake releases, allowing the motor to spin normally.
12
+
13
+
14
+## ref
15
+
16
+- [[motor-app-dat]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-FPV-dat/EX1103-dat/EX1103-dat.md
... ...
@@ -0,0 +1,99 @@
1
+
2
+# EX1103-dat
3
+
4
+- Mode: EX1103
5
+- KV options: 6000KV 7000KV 8000KV 12000KV
6
+- Configu-ration:9N12P
7
+- Stator Diamter:11mm
8
+- Stator Length:3mm
9
+- Shaft Diameter: Φ1.5mm
10
+- Motor Dimension(Dia.*Len):Φ13.5mm*16mm
11
+- Weight(g):3.7g
12
+- No. of Cells(Lipo):
13
+- 6000KV support 3-4S
14
+- 7000KV support 2-3S original motors for Larva X
15
+- 8000KV support 2-3S
16
+- 12000KV support 1-2S
17
+
18
+
19
+- EX1103-12000
20
+- 0.44A
21
+- 24750RPM
22
+- 65mm bi-blades
23
+
24
+- [[Thrust-dat]]
25
+
26
+| Voltage (V) | Throttle (%) | Thrust (g) | Power (W) | Efficiency (g/W) | RPM |
27
+|-------------|--------------|------------|-----------|------------------|------|
28
+| 7.4 | 1 | 22.5 | 7.4 | 3.041 | 1298 |
29
+| 7.4 | 2 | 40 | 14.8 | 2.703 | 1425 |
30
+| 7.4 | 3 | 58.4 | 22.2 | 2.631 | 1554 |
31
+| 7.4 | 4 | 72.3 | 29.6 | 2.443 | 1649 |
32
+| 7.4 | 5 | 87.6 | 37 | 2.368 | 1750 |
33
+| 7.4 | 6 | 98.6 | 44.4 | 2.221 | 1830 |
34
+| 7.4 | 7 | 109.3 | 51.8 | 2.110 | 1918 |
35
+| 7.4 | 8 | 119.9 | 59.2 | 2.025 | 1988 |
36
+| 7.4 | 8.3 | 121.2 | 61.42 | 1.973 | 2200 |
37
+
38
+
39
+
40
+## Can EX1103 run with 96 kHz ESC PWM?
41
+
42
+
43
+Short answer: Yes — the EX1103 motor itself can run while the ESC is switching at 96 kHz, but whether you should run 96 kHz depends entirely on your ESC hardware and firmware and the resulting ESC switching losses / heating. Below are the practical reasons, recommendations, and a safe test procedure.
44
+
45
+
46
+### 1) Motor side
47
+- Small brushless motors (1103 size) are electrically simple and **will run** with high PWM switching rates.
48
+- Higher PWM gives smoother torque and quieter operation at low RPMs.
49
+
50
+### 2) ESC side (the limiting factor)
51
+- **ESC hardware + firmware** must support 96 kHz (BLHeli_32 or BLHeli_S with Bluejay can provide higher frequencies).
52
+- Higher PWM = much higher switching frequency for the MOSFETs → **more switching losses** → ESC gets hotter and may fail if it’s not designed for it.
53
+- On tiny whoop ESCs (very small boards), 96 kHz often causes significantly higher ESC temps; some tiny ESCs only safely handle up to 48 kHz.
54
+
55
+### 3) Practical verdict
56
+- **Motor: OK.**
57
+- **ESC: maybe** — only if ESC hardware & firmware explicitly support 96 kHz and you verify temperatures are safe.
58
+- **Recommended default:** try **48 kHz** first (good balance). Move to 96 kHz only if ESC is known to handle it and bench tests pass.
59
+
60
+### Safe test procedure to verify 96 kHz on your stack
61
+
62
+1. **Check ESC firmware & hardware**
63
+ - If you have BLHeliSuite32, check available PWM options.
64
+ - If BLHeli_S, consider Bluejay to unlock higher frequencies (only if your ESC is compatible).
65
+
66
+2. **Set conservative limits**
67
+ - Limit max throttle to ~80% for the first tests (use throttle cut or governor).
68
+ - Reduce flight-time/hover duration for initial tests.
69
+
70
+3. **Bench test (props off or props on with restraint)**
71
+ - Arm and run at varying throttle pulses (hover-ish and full throttle bursts).
72
+ - Monitor ESC temperature and motor temperature after 30–60 seconds bursts.
73
+
74
+4. **Acceptable temperature thresholds (practical guidance)**
75
+ - **ESC temp:** keep **below ~80°C** ideally; if it climbs toward 90–100°C, it's unsafe.
76
+ - **Motor temp:** keep **below ~70°C** for small motors; <60°C is better.
77
+ - If temps rise quickly, stop and drop PWM to 48 kHz or 24 kHz.
78
+
79
+5. **Flight test**
80
+ - Short, conservative indoor flights; watch for ESC heating, desyncs, reduced thrust, or smoke.
81
+ - If you see any sign of ESC stress (thermal cut, brownouts, smoke), revert immediately.
82
+
83
+6. **Telemetry / logs**
84
+ - Use any ESC telemetry (current, voltage, temp) to evaluate switching losses.
85
+ - Check motor RPM and efficiency—if thrust drops or current skyrockets, higher PWM may be harmful.
86
+
87
+### Additional notes
88
+- High-KV motors (e.g., 12,000KV) spin very fast on 1–2S — higher PWM helps smooth low-speed control but brings less benefit at very high RPMs while still stressing ESCs.
89
+- For cine / smooth indoor whoop flying, many pilots prefer **48 kHz** (smooth + safer). Use 96 kHz only if your ESC is proven to handle it on your exact build.
90
+
91
+### Short recommendation
92
+- **Try 48 kHz first.** If you want to experiment with **96 kHz**, ensure your ESC firmware/hardware supports it and do careful bench/temperature tests. If the ESC runs cool and performance improves, you’re good; if it heats up, drop back down.
93
+
94
+
95
+## ref
96
+
97
+CW【黑线带红点】,CCW【黑线不带红点】
98
+
99
+- [[motor-FPV-dat]] - [[ex1103]] - [[motor-fpv]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-FPV-dat/Thrust-dat/Thrust-dat.md
... ...
@@ -0,0 +1,18 @@
1
+
2
+# Thrust-dat
3
+
4
+A bit of math:
5
+
6
+Mobula motors + props making around 90-100g of thrust at 50%
7
+
8
+Mobula8 weight around 110g with battery 550 mah An ok-ish ratio of thrust to weight is 4:1
9
+
10
+Thrust/(camweight+drone weight)
11
+
12
+400 / (16+110)= 3.17...
13
+
14
+Hence to have a proper flight you'll have to be above 50% throttle most of the time.
15
+
16
+It might fly pretty stable with proper PID tuning and filtering but your batteries will burn (maybe even literally)
17
+
18
+https://www.reddit.com/r/TinyWhoop/comments/1cw9xm4/mobula_8thumb_pro_any_tricks_for_decent_cinematic/
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-FPV-dat/motor-FPV-dat.md
... ...
@@ -0,0 +1,91 @@
1
+
2
+# FPV-motor-dat
3
+
4
+- [[motor-dat]]
5
+
6
+- [[motor-coreless-dat]] - [[propeller-dat]]
7
+
8
+- 1x 1504 2300KV (4 mounting holes)
9
+- 4x 1504 2300KV a set (4 mounting holes)
10
+- 4x 1504 2300KV + insurance a set (4 mounting holes)
11
+
12
+- 1x 1504 3600KV (4 mounting holes)
13
+- 4x 1504 3600KV a set (4 mounting holes)
14
+- 4x 1504 3600KV + insurance a set (4 mounting holes)
15
+
16
+- 1x 1504 3800KV (3 mounting holes)
17
+- 4x 1504 3800KV a set (3 mounting holes)
18
+- 4x 1504 3800KV + insurance a set (3 mounting holes)
19
+
20
+
21
+- [Benefits [and down sides] of HIGHER PWM Frequency! 🙀💪](https://www.youtube.com/watch?v=v3806Incpvo)
22
+
23
+
24
+
25
+## How to Reverse a 3-Wire Brushless Motor
26
+
27
+### 1. Identify the motor wires
28
+
29
+- Typically **3 wires** connected to ESC
30
+- Colors may vary → A, B, C (or random colors)
31
+
32
+---
33
+
34
+### 2. Swap any **two wires**
35
+
36
+- Example: swap **A and B**, leave C unchanged
37
+- This reverses motor rotation direction
38
+
39
+
40
+
41
+
42
+## how to prevent motor burning
43
+
44
+- Don’t run **96 kHz** unless you’re sure your ESC can handle it.
45
+- Set **Motor Idle Throttle ~6%** to prevent stalling.
46
+- Keep an eye on **motor temperature after indoor flights** (touch test). Warm = ok, too hot to touch = dangerous.
47
+- Avoid flying with props bent / rubbing ducts indoors (adds load).
48
+
49
+## What Does 1400KV Mean in an FPV Motor?
50
+
51
+In FPV drones, **KV** is a motor specification that indicates the motor’s speed constant.
52
+
53
+---
54
+
55
+### ⚡ Definition of KV
56
+- **KV (RPM/Volt)** = How many **Revolutions Per Minute (RPM)** the motor will spin **per 1 Volt applied**, without any load (no propeller).
57
+
58
+For example:
59
+- A **1400KV motor** spins **1400 RPM per Volt**.
60
+- If powered by a **4S LiPo (14.8 V)**:
61
+
62
+ 1400 KV × 14.8 V ≈ 20,720 RPM (no load)
63
+
64
+### 🔧 What It Means in Practice
65
+
66
+1. **Lower KV (e.g., 1400KV)**
67
+ - Spins slower per volt.
68
+ - Provides more **torque** (good for larger props, longer flight times, heavy drones, cinewhoops).
69
+ - Better for **efficiency** and carrying loads.
70
+
71
+2. **Higher KV (e.g., 2800KV, 4000KV)**
72
+ - Spins faster per volt.
73
+ - Provides less torque, but more **speed**.
74
+ - Good for **small props, racing, and high agility**.
75
+
76
+---
77
+
78
+### 🛠️ Typical Use Cases
79
+- **1400KV motors** are usually found on:
80
+- **Cinewhoops** with 3–5 inch props.
81
+- **Long-range FPV drones** where efficiency and endurance matter.
82
+- Drones designed to carry heavier cameras (e.g., GoPro).
83
+
84
+---
85
+
86
+### ✅ **Summary**:
87
+A **1400KV FPV motor** means the motor spins about **1400 RPM per volt** (unloaded). It is a **low-KV motor** designed for **larger props, more torque, and efficiency**, rather than raw speed.
88
+
89
+## ref
90
+
91
+- [[FPV]] - [[FPV-motor]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-app-dat.md
... ...
@@ -0,0 +1,5 @@
1
+
2
+# motor-app-dat
3
+
4
+- [[motor-FPV-dat]]
5
+
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-hub-dat/motor-hub-dat.md
... ...
@@ -0,0 +1,81 @@
1
+# Hub Motor Data
2
+
3
+A hub motor is a type of motor integrated with the wheel, commonly used in electric bicycles, scooters, and other light electric vehicles. The hub motor is built into the wheel hub, eliminating the need for a traditional transmission system. This design offers several advantages, including reduced mechanical complexity, lower maintenance requirements, and improved efficiency.
4
+
5
+## Key Differences: Three-Phase Motor vs. Hub Motor
6
+
7
+**Core Point:**
8
+
9
+A hub motor is essentially a three-phase brushless motor (BLDC/PMSM) with a different structure. They are not two completely different motors, but differ in application scenario and physical structure.
10
+
11
+## 1. Definition Comparison
12
+
13
+| Item | Three-Phase Brushless Motor (BLDC/PMSM) | Hub Motor |
14
+| ---------- | ---------------------------------------- | ---------------------------------------- |
15
+| What is it | A type of motor (control method) | A packaging structure |
16
+| Shape | Cylindrical, fixed shell, rotating shaft | Rotating shell (outer rotor) |
17
+| Function | Provides power | Integrated motor + wheel |
18
+| Control | Needs controller | Also needs controller (same three-phase) |
19
+
20
+So, a hub motor is not a different kind of motor, but:
21
+
22
+👉 A special structure of three-phase brushless motor (outer rotor + integrated wheel)
23
+
24
+## 2. Structural Differences (Key Point)
25
+
26
+### Ordinary Three-Phase Brushless Motor (Inner Rotor)
27
+- Stator outer ring → coil
28
+- Center → rotor with magnets
29
+- Rotor (shaft) rotates
30
+- The whole motor is fixed to the vehicle body
31
+- Similar to brushless RC motors, brushless drill motors
32
+
33
+### Hub Motor (Outer Rotor)
34
+- The wheel shell itself is the rotor (with magnets)
35
+- The stator coil is fixed inside
36
+- The whole shell rotates together, so "when the wheel turns, the motor turns"
37
+- Thus, the motor and wheel are integrated, very compact
38
+
39
+## 3. Different Application Scenarios
40
+
41
+| Ordinary Three-Phase BLDC | Hub Motor |
42
+| ---------------------------------------- | --------------------------------------------------------- |
43
+| Drones, robots, power tools, pumps, fans | Electric scooters, e-bikes, e-motorcycles, Xiaomi Ninebot |
44
+| Not integrated with wheel | Directly is the wheel |
45
+| Needs reduction gears or belt | Mostly direct drive |
46
+
47
+## 4. Performance Differences
48
+
49
+### ✔ Advantages of Hub Motors
50
+- Quiet (sine wave + sealed structure)
51
+- Maintenance-free
52
+- Dustproof and waterproof
53
+- High torque, good at low speed
54
+- High space utilization (no need to place motor in frame)
55
+
56
+### ❌ Disadvantages of Hub Motors
57
+- Heavier (adds unsprung weight to the wheel)
58
+- Harder to dissipate heat (heat is not easily transferred to the frame)
59
+- Slightly lower efficiency at high speed (wheel is large and heavy)
60
+
61
+### ✔ Advantages of Ordinary Three-Phase BLDC
62
+- Light, good heat dissipation
63
+- Can add reduction gear for more flexible speed/torque
64
+- More commonly used in robots, EV drive axles
65
+- More space for maintenance, easy to replace gears and bearings
66
+
67
+### ❌ Disadvantages of Ordinary BLDC
68
+- Needs transmission mechanism (gear/belt)
69
+- Slightly noisier
70
+- More parts, larger size
71
+
72
+## 5. In One Sentence
73
+
74
+A hub motor = a special structure (outer rotor) three-phase brushless motor used in wheels.
75
+Three-phase motor is a category; hub motor is an application.
76
+
77
+
78
+
79
+## ref
80
+
81
+- [[motor-BLDC-dat]] - [[FOC-dat]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-app-dat/motor-rover-dat/motor-rover-dat.md
... ...
@@ -0,0 +1,70 @@
1
+
2
+# motor-rover-dat
3
+
4
+- [[rover-dat]]
5
+
6
+- [[BLDC-motor-dat]]
7
+
8
+# Choosing a Motor for a Heavy-Duty Off-Road RC Crawler (Tracked Vehicle)
9
+
10
+## ✅ Quick Answer
11
+- **Best Type**: **Sensored brushless outrunner (BLDC) with 4 poles or more**
12
+- **KV Range** (depends on gearing and battery):
13
+ - **Direct drive / low gearing** → 200–600 KV (on 3S–4S)
14
+ - **With gearbox (3:1–6:1)** → 800–1500 KV
15
+- **Poles**: 4-pole or higher → more torque at low RPM
16
+- **Gearing**: Strongly recommended to use **planetary or spur gearbox (3:1–6:1)**
17
+- **ESC**: 60–150A, sensored FOC capable (for smooth startup & crawling)
18
+
19
+---
20
+
21
+## 🔎 Why This Choice
22
+1. **Outrunner BLDC** → Large diameter = higher torque at low RPM.
23
+2. **Low KV & multi-pole** → Delivers strong torque instead of excessive speed.
24
+3. **Sensored control** → Smooth startup, stable torque at very low speed (essential for crawling).
25
+4. **Gear reduction** → Multiplies torque, improves efficiency, avoids motor overheating.
26
+
27
+---
28
+
29
+## ⚙️ Example Spec (for 1/8–1/5 scale tracked builds)
30
+- **Motor**: Sensored brushless outrunner, size **3650 / 3660 / 4274**
31
+- **KV**: 300–800 KV (with 3:1–5:1 gearbox on 3S–4S battery)
32
+- **ESC**: 80–120A FOC capable, sensored input
33
+- **Battery**: 3S–4S LiPo, C-rating high enough to handle current draw
34
+
35
+---
36
+
37
+## 📐 Speed Calculation Example
38
+Motor: **1000 KV**, Battery: **3S (11.1V)**, Gear ratio: **5:1**, Track wheel diameter: **120 mm**
39
+
40
+1. Motor RPM = KV × Voltage = 1000 × 11.1 = **11,100 RPM**
41
+2. Wheel RPM = 11,100 ÷ 5 = **2,220 RPM**
42
+3. Wheel circumference = π × 0.12 m = **0.377 m**
43
+4. Speed = (2,220 × 0.377) ÷ 60 = **13.95 m/s = 50.2 km/h**
44
+
45
+➡ Too fast for crawler use → better to lower KV or increase gear ratio.
46
+
47
+---
48
+
49
+## 🚀 Practical Build Options
50
+1. **Budget** → 3650/3660, 4-pole, ~1500 KV + 4–6:1 gearbox + 80–120A ESC
51
+2. **Balanced (Recommended)** → 4274 sensored outrunner, 300–800 KV + 3–5:1 gearbox + 100A ESC
52
+3. **Heavy Load Extreme** → Dual 300 KV motors + planetary reduction + dual 120A ESCs, 4S LiPo
53
+
54
+---
55
+
56
+## 📌 What You Can Do Next
57
+I can either:
58
+1. **Do full torque/speed calculation** if you give me:
59
+ - Vehicle total weight (kg)
60
+ - Desired maximum slope angle (°)
61
+ - Target top speed (km/h)
62
+2. **List 3–5 real motor + ESC combos** with model numbers and where to buy.
63
+
64
+👉 Tell me which one you prefer, and I’ll prepare the detailed setup.
65
+
66
+
67
+
68
+## ref
69
+
70
+- [[motor]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-dat/motor-dat.md
... ...
@@ -25,7 +25,7 @@ brushless
25 25
26 26
- [[stepper-dat]] - [[servo-dat]]
27 27
28
-- [[Drum-brake-motor-dat]]
28
+- [[motor-Drum-brake-dat]]
29 29
30 30
- [[vibrator-dat]]
31 31
Tech-dat/acturator-dat/motor-dat/motor-rover-dat/motor-rover-dat.md
... ...
@@ -1,70 +0,0 @@
1
-
2
-# motor-rover-dat
3
-
4
-- [[rover-dat]]
5
-
6
-- [[BLDC-motor-dat]]
7
-
8
-# Choosing a Motor for a Heavy-Duty Off-Road RC Crawler (Tracked Vehicle)
9
-
10
-## ✅ Quick Answer
11
-- **Best Type**: **Sensored brushless outrunner (BLDC) with 4 poles or more**
12
-- **KV Range** (depends on gearing and battery):
13
- - **Direct drive / low gearing** → 200–600 KV (on 3S–4S)
14
- - **With gearbox (3:1–6:1)** → 800–1500 KV
15
-- **Poles**: 4-pole or higher → more torque at low RPM
16
-- **Gearing**: Strongly recommended to use **planetary or spur gearbox (3:1–6:1)**
17
-- **ESC**: 60–150A, sensored FOC capable (for smooth startup & crawling)
18
-
19
----
20
-
21
-## 🔎 Why This Choice
22
-1. **Outrunner BLDC** → Large diameter = higher torque at low RPM.
23
-2. **Low KV & multi-pole** → Delivers strong torque instead of excessive speed.
24
-3. **Sensored control** → Smooth startup, stable torque at very low speed (essential for crawling).
25
-4. **Gear reduction** → Multiplies torque, improves efficiency, avoids motor overheating.
26
-
27
----
28
-
29
-## ⚙️ Example Spec (for 1/8–1/5 scale tracked builds)
30
-- **Motor**: Sensored brushless outrunner, size **3650 / 3660 / 4274**
31
-- **KV**: 300–800 KV (with 3:1–5:1 gearbox on 3S–4S battery)
32
-- **ESC**: 80–120A FOC capable, sensored input
33
-- **Battery**: 3S–4S LiPo, C-rating high enough to handle current draw
34
-
35
----
36
-
37
-## 📐 Speed Calculation Example
38
-Motor: **1000 KV**, Battery: **3S (11.1V)**, Gear ratio: **5:1**, Track wheel diameter: **120 mm**
39
-
40
-1. Motor RPM = KV × Voltage = 1000 × 11.1 = **11,100 RPM**
41
-2. Wheel RPM = 11,100 ÷ 5 = **2,220 RPM**
42
-3. Wheel circumference = π × 0.12 m = **0.377 m**
43
-4. Speed = (2,220 × 0.377) ÷ 60 = **13.95 m/s = 50.2 km/h**
44
-
45
-➡ Too fast for crawler use → better to lower KV or increase gear ratio.
46
-
47
----
48
-
49
-## 🚀 Practical Build Options
50
-1. **Budget** → 3650/3660, 4-pole, ~1500 KV + 4–6:1 gearbox + 80–120A ESC
51
-2. **Balanced (Recommended)** → 4274 sensored outrunner, 300–800 KV + 3–5:1 gearbox + 100A ESC
52
-3. **Heavy Load Extreme** → Dual 300 KV motors + planetary reduction + dual 120A ESCs, 4S LiPo
53
-
54
----
55
-
56
-## 📌 What You Can Do Next
57
-I can either:
58
-1. **Do full torque/speed calculation** if you give me:
59
- - Vehicle total weight (kg)
60
- - Desired maximum slope angle (°)
61
- - Target top speed (km/h)
62
-2. **List 3–5 real motor + ESC combos** with model numbers and where to buy.
63
-
64
-👉 Tell me which one you prefer, and I’ll prepare the detailed setup.
65
-
66
-
67
-
68
-## ref
69
-
70
-- [[motor]]
... ...
\ No newline at end of file
Tech-dat/acturator-dat/motor-driver-dat/FOC-dat/FOC-dat.md
... ...
@@ -1,4 +1,3 @@
1
-
2 1
# FOC-dat
3 2
4 3
- [[FOC]]
... ...
@@ -28,6 +27,122 @@ Here's a breakdown:
28 27
FOC is widely used in applications demanding high performance, such as robotics, electric vehicles, CNC machines, servo drives, and high-efficiency appliances.
29 28
30 29
30
+## 🧠 Core Principle (Simple Explanation)
31
+
32
+FOC uses mathematics to convert motor control from three-phase currents to two axes:
33
+
34
+d-axis (flux axis)
35
+
36
+q-axis (torque-producing axis)
37
+
38
+It makes the current act only on the q-axis to produce maximum torque;
39
+while the d-axis current is set to zero to avoid interfering with the magnetic field lines.
40
+
41
+No matter how fast the motor spins or what angle it's at, FOC constantly calculates and outputs the most suitable three-phase current waveform.
42
+
43
+
44
+
45
+
46
+## Easiest and Most Cost-Effective Three-Phase BLDC Motor Drive Methods
47
+
48
+Here are the simplest, lowest-cost, and most beginner-friendly ways to drive a three-phase brushless motor, from the most basic to professional control, sorted by difficulty.
49
+
50
+### ✅ Method 1: Use a Ready-Made Brushless ESC — Easiest
51
+
52
+If you want to drive a small three-phase brushless motor (like an RC motor or for scooter motor testing),
53
+the easiest way is: buy an RC brushless ESC (Electronic Speed Controller).
54
+
55
+**Connection:**
56
+- Motor's three wires → ESC's three motor wires
57
+- ESC input → Battery (Li-ion)
58
+- Control signal → 1 PWM (servo signal)
59
+
60
+**Advantages:**
61
+- No coding required
62
+- No need to understand motor theory
63
+- Plug and play
64
+- Very cheap (just a few dollars)
65
+
66
+**Control method:**
67
+Use Arduino/STM32 or a simple PWM generator to send:
68
+- 1ms → Stop
69
+- 1.5ms → Medium speed
70
+- 2ms → Full speed
71
+
72
+You can get the motor spinning very quickly.
73
+
74
+### ✅ Method 2: Simple Six-Step Square Wave Drive (Sensorless) — Basic DIY Drive
75
+
76
+If you want to control a three-phase brushless motor yourself, this is the most basic and easiest to implement.
77
+
78
+**Principle:**
79
+A brushless motor's three phases need to be energized alternately (6 combinations), so the rotor magnets are attracted and repelled to produce rotation.
80
+
81
+**Required hardware:**
82
+- 3 half-bridges (total 6 MOSFETs)
83
+- MOS driver chips (e.g., IR2101 / IR2103)
84
+- MCU (Arduino works too)
85
+
86
+**Basic control steps:**
87
+- Switch phase sequence A→B→C… in six steps
88
+- Each step: two phases on, one phase off
89
+- Cycle at a fixed frequency to spin the motor
90
+
91
+**Disadvantages:**
92
+- Unstable startup
93
+- More vibration at low speed
94
+- Uneven torque
95
+- Prone to noise
96
+
97
+But as an entry-level experiment, it's very simple and effective.
98
+
99
+### ✅ Method 3: Six-Step Commutation with Hall Sensors
100
+
101
+If your motor has 5 thin wires (Hall sensor wires), this method is even easier to control.
102
+
103
+**Principle:**
104
+Hall sensors tell the MCU the motor's position, so commutation is more precise.
105
+
106
+**Advantages:**
107
+- Good startup
108
+- Stable at low speed
109
+- Suitable for e-bikes, scooters, and hub motors
110
+
111
+This is the basic scheme for most e-vehicle controllers.
112
+
113
+### ✅ Method 4: FOC Sine Wave Control (Professional Level)
114
+
115
+If you want "e-vehicle grade" smooth and efficient control:
116
+FOC (Field-Oriented Control) is the best.
117
+
118
+**Requirements:**
119
+- Current sampling
120
+- Clarke-Park transforms
121
+- SVPWM
122
+- Rotor position (Hall/encoder/back-EMF estimation)
123
+
124
+**Advantages:**
125
+- Smooth torque
126
+- No vibration at low speed
127
+- Silent
128
+- Highest efficiency
129
+
130
+But it's harder to get started.
131
+
132
+You can use existing MCU FOC libraries (like SimpleFOC, ST FOC library) to greatly reduce the difficulty.
133
+
134
+## 🔧 Recommended Practical Solutions (Sorted by Difficulty)
135
+
136
+- Buy an RC brushless ESC (easiest)
137
+ → Motor spins immediately
138
+- Six-step commutation with Hall sensors (entry-level drive project)
139
+ → Suitable for scooters/hub motors
140
+- Use SimpleFOC library (simple FOC implementation)
141
+ → Suitable for Arduino / ESP32
142
+- Write your own FOC (highest difficulty)
143
+ → For professional motor controller development
144
+
145
+
31 146
## ref
32 147
33 148
- [[motor-driver-dat]]
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Tech-dat/acturator-dat/motor-driver-dat/Trapezoidal-control-dat/Trapezoidal-control-dat.md
... ...
@@ -0,0 +1,75 @@
1
+
2
+# Trapezoidal-control-dat
3
+
4
+
5
+## 1. What is Six-Step Commutation?
6
+Six-step commutation is a common control method for **BLDC (Brushless DC) motors**.
7
+- Commutation happens every **60° electrical**
8
+- Voltage waveform is **trapezoidal / square-like**
9
+- Uses **Hall sensors** or **back-EMF zero crossing** for timing
10
+
11
+Main idea: **simple, low-cost, strong startup torque**.
12
+
13
+---
14
+
15
+## 2. Six-Step Commutation vs. Sinewave / [[foc-dat]] Control
16
+
17
+### Control Method
18
+- **Six-step**: abrupt commutation every 60°, current jumps
19
+- **Sinewave / [[foc-dat]]**: continuously shaped current, smooth transitions
20
+
21
+### Noise & Vibration
22
+- **Six-step**: louder, more vibration
23
+- **[[foc-dat]]**: quiet and smooth
24
+
25
+### Torque Ripple
26
+- **Six-step**: significant torque ripple (6 peaks per revolution)
27
+- **[[foc-dat]]**: almost no torque ripple
28
+
29
+### Efficiency
30
+- **Six-step**: medium efficiency
31
+- **[[foc-dat]]**: highest efficiency, especially at low speed
32
+
33
+### Cost
34
+- **Six-step**: cheap, simple hardware, light firmware
35
+- **[[foc-dat]]**: more expensive, needs stronger MCU and complex algorithm
36
+
37
+---
38
+
39
+## 3. Advantages of Six-Step Control
40
+- Very simple control logic
41
+- Low cost
42
+- Good high-speed performance (fans, tools)
43
+- Strong startup torque
44
+
45
+---
46
+
47
+## 4. Disadvantages of Six-Step Control
48
+- Higher noise
49
+- Noticeable torque ripple
50
+- Current spikes during commutation
51
+- Lower efficiency than [[foc-dat]]
52
+- Poor low-speed smoothness (can jitter)
53
+
54
+---
55
+
56
+## 5. When to Use Six-Step Control
57
+Good for:
58
+- Brushless fans
59
+- Power tools
60
+- RC model motors (many ESCs use six-step)
61
+- Pumps and simple BLDC applications
62
+
63
+Not good for:
64
+- Applications requiring **quietness** and **smooth motion** (gimbals, service robots)
65
+
66
+---
67
+
68
+## Summary (one sentence)
69
+**Six-step = low cost, simple, but noisy and less efficient.
70
+[[foc-dat]] = higher cost, complex, but smooth, quiet, and efficient.**
71
+
72
+
73
+## ref
74
+
75
+- [[motor-driver-dat]]
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Tech-dat/acturator-dat/motor-driver-dat/motor-driver-dat.md
... ...
@@ -9,12 +9,19 @@
9 9
10 10
- [[cable-dat]] - [[conn-cable-terminal-dat]] - [[wire-2-wire-dat]]
11 11
12
+
13
+
14
+- [[BLDC-dat]]
15
+
12 16
## tech
13 17
14 18
- [[PWM-chopper-type-motor-driver]] - [[FOC-dat]] - [[CC-CCW-control-dat]]
15 19
16 20
- [[AC-mains-dat]] - [[motor-dat]] drive - [[IGBT-dat]]
17 21
22
+
23
+
24
+
18 25
## Board
19 26
20 27
- [[SDR1102-dat]] - [[SDR1109-dat]] - [[SDR1048-dat]] - [[SDR1059-dat]] - [[SDR1050-dat]]
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@@ -41,6 +41,9 @@
41 41
- [[location-dat]]
42 42
43 43
44
+## mechanics
45
+
46
+- [[suspension-dat]] - [[mechanics-dat]] - [[chassis-dat]] - [[wheels-dat]] - [[shaft-connector-dat]]
44 47
45 48
46 49
## boards
... ...
@@ -49,6 +52,16 @@
49 52
50 53
51 54
55
+## rover info
56
+
57
+![](2025-11-27-15-32-34.png)
58
+
59
+## stroller version
60
+
61
+![](2025-11-27-15-33-49.png)
62
+
63
+![](2025-11-27-15-34-08.png)
64
+
52 65
53 66
## Rover Version
54 67
app-dat/vehicle-dat/electric-kart-dat/electric-kart-dat.md
... ...
@@ -7,7 +7,7 @@ Go-kart
7 7
8 8
- [[lithium-power-battery-dat]]
9 9
10
-- [[Drum-brake-motor-dat]]
10
+- [[motor-Drum-brake-dat]]
11 11
12 12
## electric tri-cycle
13 13
mechanics-dat/chassis-dat/chassis-dat.md
... ...
@@ -1,4 +1,10 @@
1 1
2 2
# chassis-dat.md
3 3
4
-- [[sheet-dat]] - [[cad-dat]]
... ...
\ No newline at end of file
0
+- [[sheet-dat]] - [[cad-dat]]
1
+
2
+- [[suspension-dat]] - [[suspension]]
3
+
4
+- [[wheel-dat]]
5
+
6
+- [[motor-dat]] - [[motor-driver-dat]]
... ...
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@@ -0,0 +1,26 @@
1
+
2
+# suspension-dat
3
+
4
+- [[bogie-dat]]
5
+
6
+## stroller classic suspension
7
+
8
+![](2025-11-27-15-37-08.png)
9
+
10
+![](2025-11-27-15-37-25.png)
11
+
12
+![](2025-11-27-15-39-55.png)
13
+
14
+## suspension with break
15
+
16
+![](2025-11-27-15-39-04.png)
17
+
18
+
19
+## suspension with rotation support
20
+
21
+![](2025-11-27-15-42-51.png)
22
+
23
+
24
+## rotating system
25
+
26
+![](2025-11-27-15-41-15.png)
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\ No newline at end of file