公开(公告)号：US06169670A

公开(公告)日：2001-01-02

申请号：US09543580

申请日：2000-04-05

申请人： Tomofumi Okubo ,  Masahiro Hiragi ,  Mutsuo Tokashiki

发明人： Tomofumi Okubo ,  Masahiro Hiragi ,  Mutsuo Tokashiki

IPC分类号： H02M3335

CPC分类号： H02M7/53803 ,  H02M7/5395

摘要： An inverter apparatus operatable over an extended output frequency range having an increased upper limit with error contained in the output voltage being suppressed by eliminating dispersions of PWM pulse signals. A PWM command pulse signal and an output voltage detection signal derived from the output of the inverter are compared straightforwardly with each other for determining difference therebetween on the basis of which error contained in the inverter output voltage is canceled. An isolation device for isolating electrically a low-voltage-rated control circuitry and a high-voltage-rated main circuitry from each other is inserted between a PWM command pulse signal generating circuit and a pulse width correcting circuit.

摘要翻译： 可以通过消除PWM脉冲信号的分散来抑制具有增加的上限的扩展输出频率范围的逆变器装置，其中包含在输出电压中的误差被抑制。 基于逆变器输出电压中包含的误差被取消，PWM指令脉冲信号和从逆变器的输出得到的输出电压检测信号直接相互比较，以确定它们之间的差异。 用于将低电压额定控制电路和高压额定主电路彼此隔离的隔离装置插入在PWM指令脉冲信号发生电路和脉冲宽度校正电路之间。