公开(公告)号：EP2320555A3

公开(公告)日：2017-11-01

申请号：EP10014384.1

申请日：2010-11-08

申请人： Hitachi Power Semiconductor Device, Ltd.

发明人： Watanabe, Yasuhiro ,  Maeda, Daisuke ,  Sakurai, Kenji ,  Sasaki, Atsushi ,  Hasegawa, Hiroyuki

IPC分类号： H02P3/18 ,  H02P6/24 ,  H02P29/02

CPC分类号： H02P6/24 ,  H02P3/18 ,  H02P29/02 ,  H02P29/0241

摘要： A motor control apparatus for preventing overvoltages due to the induced voltage when a motor (3) is rotated by an external force under the condition where an inverter circuit (1) is inoperative. The motor control apparatus includes halt occasion speed control means (52) which can reduce the motor's rotational speed when a command for starting the inverter circuit (1) is a halt command and when the rotational speed of the motor (3) is in excess of a given value, as shown in FIG 1. Consequently, when the motor is rotated by an external force, overvoltage due to the induced voltage can be prevented by reducing the motor's speed even if the inverter circuit is not in operation.

摘要翻译： 本发明提供一种电动机控制装置，该电动机控制装置用于防止在逆变器电路（1）不工作的状态下电动机（3）因外力而旋转时的感应电压引起的过电压。 该电动机控制装置具有：停止时速度控制单元（52），在起动逆变器电路（1）的指令为停止指令时，且电动机（3）的转速超过电动机 如图1所示。因此，当电动机由于外力而旋转时，即使逆变器电路不工作，也可以通过降低电动机的速度来防止由感应电压引起的过电压。