知搜-全球专利检索

  1. 登录
  2. 注册
发明授权
CN101388632B 多相交流电机驱动装置 失效 - 权利终止 转让

多相交流电机驱动装置
摘要：
本发明提供一种不会误判定故障的有无的多相交流电机驱动装置。该多相交流电机驱动装置包括：逆变器电路(3)；分别被设置在逆变器电路(3)的各相的下臂上，用于检测电机(4)的相电流的电流检测电阻(Ru、Rv、Rw)；以规定的占空比来控制逆变器电路(3)的开关元件(Q1～Q6)的导通/截止动作的控制单元(1)；以及PWM电路(2)，其中，在逆变器电路(3)的上臂的开关元件(Q1、Q3、Q5)的导通占空比不小于规定值时，不进行基于电流检测电阻(Ru、Rv、Rw)检测出的电流值的故障有无的判定。
摘要（英）：

A multi-phase AC motor driving device in which occurrence of failure is not erroneously determined is provided. The multi-phase AC motor driving device includes an inverter circuit (3); current detecting resistances Ru, Rv, and Rw, respectively arranged on lower arm of the respective phase of the inverter circuit (3), for detecting phase current of the motor ()4; and a control portion (1)and a PWM circuit ()2 for controlling ON/OFF operation of switching devices (Q1-Q6) of the inverter circuit, the determination on the occurrence of failure based on the current values detected by the current detecting resistances Ru, Rv, and Rw is not made if the ON-duty ratios of the switching devices Q1, Q3, Q5 on the upper arms of the inverter circuit are not smaller than a predetermined value.

公开/授权文献
0/0