In this note, we are going to know about the difference between PMSM and BLDC Motor or PMSM vs BLDC Motor. Welcome to Poly Notes Hub, a leading destination for Diploma Engineering Notes for Polytechnic Students.
Author Name: Arun Paul.
Difference between PMSM and BLDC Motor
Below we listed some differences of these two type of motor –
| Features | PMSM | BLDC Motor |
|---|---|---|
| Motor type | AC Motor | DC Motor |
| Generated Back EMF | Sin Wave | Trapezoidal Wave |
| Efficiency | Upto 97% ( More Efficient ) | Upto 90% ( Less Efficient ) |
| Losses | Less core losses | High core losses |
| Control | Simple control mechanism | Complex control mechanism |
| Cost | High | Less |
| Cooling | Require external cooling method | Require less cooling method |
| Control Accuracy | High | Less |
| Magnet on Rotor | Permanent Magnet | Permanent Magnet |
| Applications | Used in Machine tools, Servo Drives, Traction system etc. | Used in Robotics, Automation systems, Hard Drives etc. |