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    • 5. 发明授权
    • Apparatus and method for starting and controlling a motor
    • 用于启动和控制电机的装置和方法
    • US5512809A
    • 1996-04-30
    • US289070
    • 1994-08-11
    • Scott A. BanksValery KravetsJohn C. Fox
    • Scott A. BanksValery KravetsJohn C. Fox
    • H02P1/42H02P1/44
    • H02P1/42
    • An apparatus and method for starting and controlling a motor comprises a timing circuit and a main control circuit. The timing circuit initiates a start-up period upon detecting power and provides an indication of the start-up period. The main control circuit receives the indication of the start-up period and applies variable magnitudes of power to a main winding of the motor. During the start-up period, the power applied to the main winding has a fixed, substantially maximum magnitude. During a period of normal operation following, the power applied to the main winding has a user-adjustable magnitude. The start-up period duration is as long as necessary for the motor to overcome a starting load thereon. Preferably, the timing circuit has a timer measuring the start-up period and a main relay signaling the start-up period to the main control circuit. Preferably, the apparatus also has a start-up relay and a start-up control circuit applying power to a start-up winding of the motor in addition to the power applied by the main control circuit to the main winding during the start-up period.
    • 用于启动和控制电动机的装置和方法包括定时电路和主控制电路。 定时电路在检测到电源时启动启动周期,并提供启动周期的指示。 主控制电路接收启动周期的指示,并向电动机的主绕组施加可变的功率大小。 在启动期间,施加到主绕组的功率具有固定的,基本上最大的幅度。 在正常操作期间,施加到主绕组的功率具有用户可调节的大小。 启动周期持续时间与电动机克服其上的起动负载一样长。 优选地,定时电路具有测量启动周期的定时器和向主控制电路发信号通知启动周期的主继电器。 优选地,该装置还具有启动继电器和启动控制电路,除了在启动期间主电源施加到主绕组的电力之外,向电动机的起动绕组施加电力 。