简要分析了引起K-489电动机副极线包松动的原因，并采取相应针对性的措施加以处理，效果较好。
This paper simply analyzes the causes of looseness default of inter pole coils of electrical motor K-489, and bring forward relevant measures to treat this default, which achieves fairly good effect.
当电机作四极运转时，先按二极运转启动，然后切换开关使主绕组抽头A2与A4连接电机既作四极运转，此时副绕组开路。
When the motor runs in four-pole mode, it is started at two-pole mode and taps A2 and A4 are then connected together. In the meantime secondary winding is open.
此外，这种结构包括在副集电极之上的有源区(集电极)、在有源区之上的基极和在基极之上的发射极。
In addition, this structure includes an active area (collector) above the sub-collector, a base above the active area, and an emitter above the base.
此外，这种结构包括在副集电极之上的有源区(集电极)、在有源区之上的基极和在基极之上的发射极。
In addition, this structure includes an active area (collector) above the sub-collector, a base above the active area, and an emitter above the base.
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