公开(公告)号：WO2017074508A1

公开(公告)日：2017-05-04

申请号：PCT/US2016/031116

申请日：2016-05-06

Applicant: EATON CORPORATION

Inventor： GIBBS, Irving Albert ,  FARR, Thomas Arthur ,  VENHAUS, Gregory John ,  VANDERMEULEN, Aaron H.

IPC: H02P1/58 ,  H02P27/08 ,  H02J9/06

CPC classification number: H02P27/04 ,  H02J9/06 ,  H02P1/58 ,  H02P27/08

Abstract: A system includes a variable frequency drive (VFD) comprising an inverter having an output configured to be coupled to a motor and a switch configured to couple a power source to the motor to bypass the VFD. The system further includes a control circuit configured to synchronize the VFD to the power source, to operate the switch to couple the power source and the VFD in parallel and to subsequently disable the inverter responsive to a current of the inverter. In some embodiments, a PWM frequency of the VFD may be temporarily increased when transferring the motor from the power source to the VFD.

Abstract translation: 系统包括变频驱动器（VFD），变频驱动器（VFD）包括具有被配置为耦合到电动机的输出和被配置为将电源耦合到电动机以绕过VFD的开关的逆变器。 该系统还包括控制电路，该控制电路被配置为使VFD与电源同步，以操作开关以并联电源和VFD，并且随后响应于逆变器的电流禁用逆变器。 在一些实施例中，当将电动机从电源传送到VFD时，VFD的PWM频率可以暂时增加。