Analytic calculation method for inherent frequency of disc type permanent magnet motor rotor

The invention discloses a disc type permanent magnet motor rotor inherent frequency analytical calculation method, which comprises the following steps of S1, enabling a rotor back plate to be equivalent to a circular ring plate, and establishing an equivalent circular ring plate vibration equation under a polar coordinate system; s2, acquiring the inherent frequency of the equivalent circular ring plate according to the boundary condition of the free mode of the rotor back plate; and S3, according to the inherent frequency of the equivalent circular ring plate, determining the equivalent stiffness of the rotor back plate, and obtaining the inherent frequency of the rotor. According to the method, rapid and accurate calculation of the inherent frequency of the disc type permanent magnet motor rotor is realized, and a theoretical basis is provided for high-performance motor design. 本发明公开了一种盘式永磁电机转子固有频率解析计算方法，包括步骤如下：S1.将转子背板等效为圆环板，在极坐标系下，建立等效圆环板振动方程；S2.根据转子背板自由模态的边界条件，获取等效圆环板的固有频率；S3.根据等效圆环板的固有频率，确定转子背板的等效刚度，获取转