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公开(公告)号：US4516065A
公开(公告)日：1985-05-07
申请号：US530101
申请日：1983-09-07
CPC分类号： H02P27/045 , H02P2207/01 , H02P2207/05
摘要： When driving an AC motor with a PWM inverter, the width of a speed command signal is modulated by a carrier to produce width modulated pulses for controlling main switching elements. The width modulated pulses are liable to be attended with impulses which cause magnetic vibrations in the AC motor, resulting in noises. The generation of these impulses can be suppressed by changing the amplification factor of an amplifier for the speed command signal or the amplitude of the carrier on the basis of the rate of change of the speed command signal. Noises which would be attendant on low speed running of the AC motor can be reduced by changing the amplification factor of the amplifier and the amplitude of the carrier on the basis of detected frequency of the speed command signal or revolution of the AC motor during low speed running.
摘要翻译： 当用PWM逆变器驱动交流电动机时，速度指令信号的宽度被载波调制以产生用于控制主开关元件的宽度调制脉冲。 宽度调制脉冲容易受到在AC电动机中引起磁振动的脉冲的影响，导致噪声。 可以通过根据速度指令信号的变化率改变速度指令信号的放大器的放大系数或载波的振幅来抑制这些脉冲的产生。 可以通过根据速度指令信号的检测频率或低速时交流电动机的转速来改变放大器的放大系数和载波幅度来减少交流电动机的低速行驶的噪声。 跑步
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公开(公告)号：US4532464A
公开(公告)日：1985-07-30
申请号：US565864
申请日：1983-12-27
CPC分类号： H02P21/0003 , H02P21/09
摘要： A control apparatus for an induction motor wherein an inverter is connected between a power source and the induction motor so as to energize the induction motor through the inverter, characterized in that when an input voltage of the inverter has lowered, a magnetizing current component command is decreased, while a torque current component command is increased.
摘要翻译： 一种用于感应电动机的控制装置，其中逆变器连接在电源和感应电动机之间，以通过逆变器激励感应电动机，其特征在于，当逆变器的输入电压降低时，磁化电流分量指令为 而转矩电流分量指令增加。
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