利用气隙比磁导法建立了混合式步进电动机的磁网络模型，推导出谐波反电势的表达式。
The magnetic network model of hybrid step motor is established according to the air gap late permeance method, and the expression of the harmonic back EMF is deduced.
该电动机的定子除了换新外别无他法。
本文讨论了并励电动机用调磁法调速过程转矩随磁通减小而增大的关系。
This paper discusses the relation between the electromagnetic torque of a shunt dc motor and its flux. The torque increases as the flux decreases.
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