Based on the introduction of components and principle of work of frequency modulation system of constantfrequency AC powersupply, math model of frequency modulation system is established.
在介绍某型恒频交流电源频率调节系统的组成和工作原理的基础上，建立频率调节系统的数学模型。
2
The stator of motor adopts centralized winding and its rotor applies permanent magnet material. The constant speed can be achieved at a certain frequency of powersupply.