公开(公告)号：US4516065A

公开(公告)日：1985-05-07

申请号：US530101

申请日：1983-09-07

申请人： Hisakazu Ninomiya ,  Satoshi Ibori ,  Hiroshi Nagase ,  Sadayuki Igarashi ,  Hiroshi Sugai

发明人： Hisakazu Ninomiya ,  Satoshi Ibori ,  Hiroshi Nagase ,  Sadayuki Igarashi ,  Hiroshi Sugai

IPC分类号： H02P27/04 ,  H02P5/40

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