12.5. Synchronous Motor Drive Systems

12.5.1. Permanent Magnet (PM) Synchronous Motors

PM synchronous motors are constantly gaining popularity among the scientific community, especially in the fields of electric traction and power generation. This occurs mainly due to their inherent advantages of high power density, high efficiency, and reliability. Their performance and efficiency have rendered them the dominant choice in many applications. Permanent magnet motor (PMM) is related to the classical synchronous motor with the difference that the dc winding is replaced by PMs that produce steady magnetic flux. This way the copper losses in the rotor are eliminated, since there is no field winding and, consequently, the overall motor efficiency is ...

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