Establishment the equivalent model and parameter calculation of a new concept of high-speed permanent magnet synchronous machine with hybrid excitation on the stator

In order to solve the problem that the permanent magnet on the rotor of high-speed permanent magnet synchronous machine (PMSM) is easy to be damaged by centrifugal force and easy to be affected by high temperature, which leads to non-reverse demagnetization, a new concept of high-speed permanent magnet synchronous machine with hybrid excitation on the stator (PMSMHES) is introduced in this paper. And its structure and electromagnetic parts are designed. PMSMHES uses a hybrid excitation method, so that the air gap magnetic field of the permanent magnet motor can be adjusted, thereby solving the problem of a narrow constant power range when the motor is running. Secondly, the equivalent magnetoelectric model of PMSMHES is proposed and the calculation method of related parameters is proposed. Finally, the rationality of the equivalent model and the calculation method of each parameter is verified by finite element simulation.