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在工矿企业中广泛采用同步电动机,以提高电网功率因数。但是,如用同步电动机来驱动飞轮力矩较大的机械设备,例如矿井扇风机时,除了满足轴功率的要求外,还必须经过起动条件的验算后方能选用。为便于起动并使运行稳定,在同步电动机转子磁极顶部装有与异步电动机相似的鼠笼形结构,称为阻尼绕组。当定子接入交流电源时,
In industrial and mining enterprises widely used synchronous motor, in order to improve the grid power factor. However, if a synchronous motor is used to drive mechanical equipment with large flywheel torque, such as a mine fan, in addition to meeting shaft power requirements, it must be tested before starting conditions can be selected. In order to facilitate the start and make the operation stable, the top of the rotor of the synchronous motor is equipped with a squirrel-cage structure similar to an asynchronous motor, which is called a damping winding. When the stator is connected to AC power,