Permanent Magnet Synchronous Motor (PMSM)
A permanent magnet motor uses magnets in the rotor and is the most common EV drive motor.
What is Permanent Magnet Synchronous Motor (PMSM)?
It is very efficient. Rare earth magnets are often used. It needs an inverter. They are compact and powerful, which suits the limited space in cars. Some manufacturers are developing motors that reduce or avoid rare earth materials. The motor can also act as a generator for regenerative braking, which recovers energy when slowing down.
How it works
The stator field rotates and pulls the magnetised rotor.
Why it matters for your car
Magnet materials raise cost and supply issues. Bearing noise can develop.
Other terms
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