1.8 KiB
1.8 KiB
Motor Research
The research for better motor tech. We will be comparing between different kinds of motors in order to gain a better understanding of them.
Priorities
- Efficiency: Current efficiency range (70/87%), goal (90-95%), efficiency is measured in output power (rpm/torque) per watt.
- Reliability: Withstand a long duration of high throttle and extreme conditions of weather.
BLDC vs PMSM
| Feature | BLDC (Brush-less DC Motor) | PMSM (Permanent Magnet Synchronous Motor) |
|---|---|---|
| Rotor | Permanent magnets | Permanent magnets |
| Stator winding | Trapezoidal | Sinusoidal |
| Back-EMF waveform | Trapezoidal | Sinusoidal |
| Control | Typically 6-step (commutation) | Field-Oriented Control (FOC) / sinusoidal |
| Torque ripple | Higher (due to 6-step commutation) | Lower (smooth sinusoidal control) |
| Efficiency (general) | Slightly lower | Slightly higher |
| Cost and complexity | Lower cost, simpler control | Higher cost, more complex control |
| Applications | Fans, RC planes, e-bikes, hobby motors | EVs, drones, industrial drives, high-end motors |
BLDC - Brush-less DC motor
PMSM - Permanent Magnet Synchronous Motor
