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    • 7. 发明授权
    • Electric motor with rotational speed regulation
    • 电动机转速调节
    • US4317072A
    • 1982-02-23
    • US100430
    • 1979-12-05
    • Sven K. L. GoofJens S. Hansen
    • Sven K. L. GoofJens S. Hansen
    • H02P6/16A61C1/02A61C1/06H02K7/14H02K29/08H02P6/06H02P6/08H02P29/00H02P6/02
    • H02K29/08H02K7/14H02P6/08
    • Electric motors which are used for instance as driving motors for drilling and cutting implements incorporated in the handle of such implements, are subjected to strongly varying loads. This puts heavy demands to the regulation system of the motor. In a regulation system the signals which are provided by detectors (22) for currently sensing the position of the rotor relative to the stator, are supplied to a pulse generator (44, 46) which provides a pulse frequency being uniquely associated with the period of the varying detector signal. This pulse signal is supplied to a frequency-to-voltage converter (48) which provides an output signal being supplied to a diferential amplifier (50) as one input signal thereof, the other input signal being a reference DC voltage, and the output signal of the amplifier being supplied to a multiplier unit (40, 42) as one input signal thereof, the other input signal being said detector signal. The output signal of the multiplier unit is supplied to the exciting windings (16, 18) of the motor via a power amplifier (54, 56).
    • 用作例如用于钻具和切割工具的驱动电动机的电动机被并入这种工具的把手中,受到强烈变化的负载。 这对电机的调节系统提出了很大的要求。 在调节系统中,由用于当前感测转子相对于定子的位置的检测器(22)提供的信号被提供给脉冲发生器(44,46),脉冲发生器(44,46)提供脉冲频率,该脉冲频率与 变化的检测器信号。 该脉冲信号被提供给频率 - 电压转换器(48),其将提供给差分放大器(50)的输出信号作为其一个输入信号,另一个输入信号作为参考DC电压,并且输出信号 的放大器作为其一个输入信号提供给乘法器单元(40,42),另一个输入信号是所述检测器信号。 乘法器单元的输出信号通过功率放大器(54,56)提供给电动机的励磁绕组(16,18)。