to make a review about the most effective methods used to reduce the cogging torque and improve the performance of the motor.
The only way is to redesign the mechanics of the motor. Skew the slots in the rotor, and the transitions will be far more gentle.
Alternatively, if you don't want to do that, build the drive electronics into a feedback circuit which reads motor rotation from a Gray code encoder mounted on the shaft.
Good luck with this one.
You need to optimize your initial design of PMSM using an effective optimize method. I recommend you to use JMAG designer.
https://ieeexplore.ieee.org/document/7814968
Gray code looks like binary but, unlike binary, only one bit changes per transition, which makes it ideal for motion sensing. You buy it as a disk, with or without the optical sensors, which you mount on the motor shaft. You need to specify the resolution you need, which determines the number of bits.
Hope this helps.
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