motor drive
motor specs
motor type
brushed
motor-brushed-dat == Permanent Magnet Brushed DC Motor
Motor-reduction-Gear-dat - motor-TT-dat - MG540-dat - MG513-dat - reduction-Gear-Motor
| Type | Brushed / Brushless | Key Traits | Application |
|---|---|---|---|
| Coreless DC motors | Brushed | Very lightweight, fast acceleration | Drones, medical tools, high-end RC |
| DC gear motors | Brushed | Built-in gearbox for torque | Robotics, automation, lifting mechanisms |
| Brushless DC motors (BLDC) | Brushless | Efficient, no brushes, often sensorless | E-bikes, drones, industrial fans |
| Stepper motors | Brushless | Precise, incremental rotation (not continuous) | 3D printers, CNC, camera sliders |
| Servo motors | Brushed / Brushless | DC motor + feedback + control board | RC, robotics, automation |
| Industrial DC motors | Brushed | High voltage/power, long-duty cycles | Conveyor belts, mills, elevators |
𧱠Common Types
| Motor Type | Gearbox Type | Used For |
|---|---|---|
| Brushed DC motor | Planetary / Spur | Robotics, automation, wheels |
| Coreless motor | Micro spur gear | Micro robots, drones |
| Stepper motor | Harmonic / Worm | Precision gear movement |
coreless Motor vs. Brushless Motor
| Feature | Coreless Motor (Coreless DC Motor) | Brushless Motor (BLDC) |
|---|---|---|
| Rotor Design | No iron core (hollow cup winding) | Rotor has permanent magnets |
| Commutation | Brushed (mechanical commutator with brushes) | Electronic (uses sensors or controller) |
| Inertia | Very low, allowing fast response | Moderate, depending on design |
| Efficiency | High (especially in low-power apps) | Very high (especially at medium/high power) |
| Noise | Very quiet at low speed | Quiet, can produce high-frequency noise |
| Speed Response | Extremely fast acceleration/deceleration | Fast, depends on controller and load |
| Lifespan | Limited (due to brush wear) | Long (no brushes = less wear) |
| Maintenance | May need brush replacement | Minimal maintenance |
| Control Complexity | Simple (direct voltage control) | Requires motor controller (ESC) |
| Size / Weight | Very compact and lightweight | Can be compact but larger for same power |
| Typical Voltage | Low (e.g. 3V, 6V, 12V) | Can handle higher voltages (12Vâ60V+) |
| Cost | Generally cheaper | More expensive due to controller and design |
| Best For | Micro motors, medical devices, toys, robotics | Drones, RC vehicles, electric tools, e-bikes |
brushed vs brushless
Brushed PMDC vs. Brushless (BLDC) Motors
| Feature | Brushed PMDC Motor (e.g., 775) | Brushless DC Motor (BLDC) |
|---|---|---|
| Commutation | Mechanical (via Carbon Brushes) | Electronic (via ESC/Controller) |
| Lifespan | Shorter (Brushes wear out over time) | Very Long (Limited only by bearings) |
| Efficiency | Lower (Friction and heat from brushes) | Higher (Lower energy loss) |
| Maintenance | Brushes may need replacement | Maintenance-free |
| Complexity | Simple (Connect to DC power to run) | Complex (Requires a specialized driver) |
| EMI/Noise | High (Arcing/sparks from brushes) | Low (Clean electronic switching) |
| Heat Dissipation | Heat builds on the internal rotor | Heat builds on the outer stator (easier to cool) |
| Cost | Inexpensive | More Expensive |
more comprehansive Brushed vs. Brushless DC Motors
| Feature | Brushed PMDC Motor | Brushless DC Motor (BLDC) |
|---|---|---|
| Visual - Wires | 2 Wires (Positive & Negative) | 3 Wires (Phases) + optional 5 sensor wires |
| Visual - Rotation | Inrunner (Only the shaft spins) | Inrunner or Outrunner (External shell spins) |
| Commutation | Mechanical (Carbon Brushes) | Electronic (Transistors/ESC) |
| Internal View | Visible commutator and brush sparks | Copper coils (stator) and magnets (rotor) |
| Efficiency | ~75% - 80% (Lower due to friction) | ~85% - 95% (High efficiency) |
| Lifespan | ~1,000 - 3,000 hours (Brushes wear) | 10,000+ hours (Limited only by bearings) |
| Top Speed | Limited by brush friction/heat | Very High (Limited by balance/bearings) |
| Torque/Weight | Moderate | Superior (High torque-to-weight ratio) |
| Control System | Simple DC Switch / PWM MOSFET | Complex ESC (Electronic Speed Controller) |
| Cost | Low (Economy choice) | Higher (Investment in controller + motor) |
| Example Models | 775, 550, 370 Motors | Drone motors, Hoverboard Hubs, E-bike motors |
motor by purpose
commerlized motor system demo
mechanical parts
Using Lower KV Motors on Mobula8
1. What KV Means
- KV = Motor RPM per volt (without load)
- Higher KV â faster motor spin â more aggressive flight
- Lower KV â slower spin â smoother, more controllable flight
2. Advantages of Lower KV Motors
- Smoother indoor flight: Slower response makes hovering and gentle maneuvers easier
- Less vibration: Easier to tune PID for stable flight
- Lower heat & power draw: Motors and ESCs run cooler, extending life
- Longer flight time: Less energy wasted on high-speed spinning
3. Disadvantages / Considerations
- Less thrust: Mobula8 might struggle with fast flips or aggressive maneuvers
- Battery voltage match: Lower KV may require slightly higher voltage (2Sâ3S) to maintain comparable thrust
- Propeller size & pitch: Lower KV works better with slightly larger or higher-pitch props, but Mobula8 frame limits size
4. Practical Notes
- Stock Mobula8 motors: EX1103 KV11000
- Lower KV options: KV9000âKV10000 for smoother indoor flight
- ESCs must handle motor current; check your 4Aâ5A rating is sufficient
5. Summary
- â Indoor/cinematic flying: Lower KV preferred
- â ïž Freestyle/acro flying: Might reduce agility
- Adjust PID and throttle curves in Betaflight after motor swap