The Permanent Magnet Synchronous Motor (PMSM) is an AC synchronous motor whose field excitation is provided by permanent magnets, and has a sinusoidal Back EMF waveform.
With permanent magnets the PMSM can generate torque at zero speed Higher torque density versus AC Induction Motors (ACIM), i.e., smaller frame size for same power High efficiency operation Requires digitally controlled inverter for operations
Advantages:
- No sparks → safer in explosive environments
- Cleaner, faster, more efficient
- Less noisy, more reliable
- Designed for high-performance servo applications
- Runs with/without position encoders
- More compact, efficient and lighter than ACIM
- Coupled with FOC control produces optimal torque
- Smooth low- and high-speed performance
- Low audible noise and EMI