In this paper,by using finite element analysis,the effects of various dimensions of rotor permanent magnets of the embedded variable-frequency permanent magnet synchronous motor on the magnetic flux density,the static/dynamic characteristics,and the performance of the motor were analyzed;the design principles and dimension ranges of the permanent magnetic pole dimensions of the two permanent magnet rotors with rectangular and V-shaped permanent magnets were investigated.On the basis of the analysis results,a rectangular-shaped permanent magnet motor and a V-shaped permanent magnet motor were designed.The d axis inductance,q axis inductance,and permanent magnet flux were calculated through finite element analysis.An experiment was conducted to test the parameters of the motors,and the results validated the theoretical analysis.This paper provides a theoretical basis for the design and parameter calculation of the embedded variable-frequency permanent magnet synchronous motor.