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    Alternating current motor starting apparatus and method
    2.
    发明授权
    Alternating current motor starting apparatus and method 失效
    交流电动机起动装置和方法

    公开(公告)号：US3667015A

    公开(公告)日：1972-05-30

    申请号：US3667015D

    申请日：1970-06-18

    申请人： WESTINGHOUSE ELECTRIC CORP

    发明人： GODWIN GURNEY L ,  KILGORE LEE A

    IPC分类号： H02P1/16 ,  H02P1/52

    CPC分类号： H02P1/166

    摘要： A starting set including an induction machine and a synchronous machine is brought up to speed before connection to the main motor that is to be started. The induction machine may have a number of poles that is a fraction, such as one-half, of the poles of the synchronous machine of the starting set so that the secondary of the wound rotor motor produces a voltage at that fraction of the line frequency at full speed. Alternatively, the induction machine and the synchronous machine of the starting set may have the same or nearly the same number of poles but the machines are concatenated to provide the desired frequency change. After the starting set is up to full speed, the main motor is connected to the secondary of the wound rotor motor and accelerates to a speed near synchronism with the secondary supply. If the main motor is a synchronous machine it is then synchronized with the secondary supply by applying field excitation. Means are then provided to increase the load on the synchronous machine of the starting set. The starting set is then disconnected from the power line so that it will begin to decelerate and, when brought to as low a speed as possible, the main motor will be running at nearly line synchronous speed and can be synchronized with the line.

    摘要翻译： 在连接到要启动的主电动机之前，包括感应电机和同步电机的启动装置被提升。 感应电机可以具有数量的极数，例如起动装置的同步电机的极数的二分之一，使得绕组转子电动机的次级在线频率的一部分产生电压 全速。 或者，起动机的感应电机和同步电机可以具有相同或几乎相同的极数，但是机器被级联以提供期望的频率变化。 起动机组达到全速后，主电机连接到绕线转子电机的次级，加速到与二次电源接近同步的速度。 如果主电机是同步电机，则通过施加励磁励磁与次级电源同步。 然后提供装置以增加起动装置的同步电机上的负载。 然后起动机组与电源线断开，使其开始减速，当达到尽可能低的速度时，主电机将以几乎同步的速度运行并且可以与线路同步。