公开(公告)号：US5646499A

公开(公告)日：1997-07-08

申请号：US516659

申请日：1995-08-18

申请人： Yoshiaki Doyama ,  Keizo Matsui ,  Yoshiteru Ito ,  Kaneharu Yoshioka ,  Hideo Ogata ,  Izumi Yoshida ,  Shusaku Watakabe

发明人： Yoshiaki Doyama ,  Keizo Matsui ,  Yoshiteru Ito ,  Kaneharu Yoshioka ,  Hideo Ogata ,  Izumi Yoshida ,  Shusaku Watakabe

IPC分类号： G01P3/48 ,  H02P23/08 ,  H02P5/408

CPC分类号： G01P3/48 ,  H02P23/08

摘要： An inverter control apparatus for controlling a command frequency and a command voltage which are supplied to an inverter which then supplies AC power of a desired frequency, accordingly, to an induction motor. The inverter control apparatus receives a requested rotational speed of the motor and an actual rotational speed of the motor is obtained by detecting a frequency of a fluctuation component of a drive current supplied from the inverter to the induction motor. The difference between the requested rotational speed and the actual rotational speed represents a slip amount, which is added to the requested rotational speed to produce a command frequency. The command voltage is set to a voltage acquired when the monitored drive current is at a minimum value. Thus, the inverter control apparatus is able to maintain power consumption at the lowest possible level in response to changes in the operating environment without requiring a motor constant input or a motor speed detector, while compensating the slip ratio of the induction motor to maintain the motor speed at a target level.

摘要翻译： 一种逆变器控制装置，用于控制提供给逆变器的指令频率和指令电压，然后将逆变器提供所需频率的交流电力给感应电动机。 逆变器控制装置接收电动机的请求转速，并且通过检测从逆变器提供给感应电动机的驱动电流的变动分量的频率来获得电动机的实际转速。 所请求的转速与实际转速之间的差值表示一个滑移量，它被加到所要求的转速上以产生一个指令频率。 指令电压被设定为当监视的驱动电流处于最小值时获取的电压。 因此，逆变器控制装置能够在不需要电动机恒定输入或电动机速度检测器的情况下响应于操作环境的变化而将功率消耗保持在最低可能水平，同时补偿感应电动机的滑动比来维持电动机 速度在目标水平。