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交流鼠笼式异步电动机具有结构简单,价格便宜,运行可靠,坚固耐用,制造维修比较方便等优点,因此,在农村得到了极为广泛的应用。采用铸铝转子,是鼠笼电机结构简单、坚固耐用的一个重要原因。但是如果转子铝条浇铸质量不好,有裂缝或孔隙存在,经过一段时间运行之后,常会造成铝条断裂。转子断条后,电机转矩减小;加上负载后,转速显著下降,定子电流显著增加;有时还会使电机振动并发出嗡嗡的响声。当电机发生
The AC squirrel-cage asynchronous motor has the advantages of simple structure, low price, reliable operation, durability, manufacturing and maintenance, and the like. Therefore, it has been widely applied in rural areas. The use of cast aluminum rotor, squirrel cage motor is simple, robust and an important reason. However, if the rotor aluminum casting quality is not good, there are cracks or pores, after a period of operation, often lead to broken aluminum. Rotor broken bar, the motor torque decreases; coupled with the load, the speed dropped significantly, the stator current significantly increased; sometimes make the motor vibration and buzzing sound. When the motor happens