公开(公告)号：US20150303859A1

公开(公告)日：2015-10-22

申请号：US14418180

申请日：2013-07-29

Applicant: DENSO CORPORATION

Inventor： Kouichi YAMADA ,  Koji SAKAI

IPC: H02P27/08 ,  H02P5/74

CPC classification number: H02P27/085 ,  B60L15/02 ,  B60L15/20 ,  B60L2270/147 ,  H02P5/74 ,  Y02T10/645 ,  Y02T10/646 ,  Y02T10/72 ,  Y02T10/7275

Abstract: A motor drive apparatus includes multiple inverter circuits provided corresponding, respectively, to multiple motors, a controller configured to control the inverter circuits using switching signals, a detector configured to detect a current ripple generated by switching operations of the inverter circuits. The controller operates in a first mode and a second mode. In the first mode, carrier wave frequencies of reference carrier waves used to generate the switching signals for all the motors are set to the same basic frequency. In the second mode, the carrier frequency of the motor having a higher priority is set to the basic frequency, and the carrier frequency of the motor having a lower priority is set to a preset shift frequency. When the current ripple is not less than a predetermined value, a transition occurs from the first mode to the second mode.

Abstract translation: 电动机驱动装置包括分别与多个电动机对应地设置的多个逆变器电路，配置为使用开关信号来控制逆变器电路的控制器，被配置为检测由逆变器电路的开关动作产生的电流纹波的检测器。 控制器以第一模式和第二模式操作。 在第一模式中，用于产生用于所有电动机的开关信号的参考载波的载波频率被设置为相同的基本频率。 在第二模式中，具有较高优先级的电动机的载波频率被设置为基本频率，并且将具有较低优先级的电动机的载波频率设置为预设的频移。 当电流纹波不小于预定值时，从第一模式发生到第二模式。