最后，根据电机学的知识，推导出了直线电机的数学模型，并在此基础上，设计了采用PLC控制的电磁举升系统的控制部分。
Finally, according to the knowledge of the motor, derives out the mathematics model of the linear motor. On this basis, designs the electromagnetic lifting system with PLC.
本文主要论述运用电机学原理解决绕线式异步电机起动中的火花异常问题。
This paper mainly talks about applying electric motor Principle to solve the wound-primary type asynchronous motor starting sparks abnormal problem.
依据电机学原理设计一种录像机磁鼓电动机驱动电路，并介绍了电路的主要结构和工作原理。
This paper designs the driving circuit of the memory dram electromotor by the theory of television and introduces the structure and principle.
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