motor-dat

motor specs

motor type

brushed

brushless

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

🧱 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

⚙ 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 (12V–60V+)
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

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 → faster motor spin → more aggressive flight
  • Lower KV → slower spin → 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 (2S→3S) 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: KV9000–KV10000 for smoother indoor flight
  • ESCs must handle motor current; check your 4A–5A rating is sufficient

5. Summary

  • ✅ Indoor/cinematic flying: Lower KV preferred
  • ⚠ Freestyle/acro flying: Might reduce agility
  • Adjust PID and throttle curves in Betaflight after motor swap

ref

Table of Contents

https://www.electrodragon.com