A permanent magnet synchronous motor (PMSM) – is a synchronous electric motor which uses permanent magnets embedded in the inductor. PMSM machines are the most forward ones, because provide operated at a range of speeds without using of any gear system. This is step to get more efficiency and compact. Using configuration for in-wheel applications can be right decision, but you should understand that it can do serious problem at high speeds. It is the main disadvantage of permanent magnet synchronous motor which may result a huge iron loss. PMSM is the most popular motor used in the BEVs currently. Rotor is the main difference between a permanent magnet synchronous motor and an induction motor. Permanent magnet synchronous electric motors have the excellent performance of power and volume, and so torque and inertia.
Types of Permanent Magnet Synchronous Motor
Permanent Magnet Synchronous Motor Construction
A permanent magnet synchronous motor consists of a rotor and a stator. Typically, the rotating rotor is installed inside the fixed stator of the electric motor.
The steel rotor consists of permanent magnets which using to create a magnetic field.
The stator of the Permanent Magnet Synchronous consists of a frame and a core with its windings. There are designs with two-phase or three-phase winding.
Permanent magnet synchronous motor Working principle
The basis of operation of a permanent magnet synchronous motor is founded on the interactivity of the rotating magnetic field of the stator and the constant magnetic field of the rotor. The idea of the rotating magnetic field of the stator of a synchronous motor is the identical as a three-phase induction motor.