公开(公告)号：US09716444B2

公开(公告)日：2017-07-25

申请号：US14933004

申请日：2015-11-05

Applicant: GE Energy Power Conversion Technology Ltd

Inventor： Robert Gregory Wagoner ,  Cheng Luo ,  Siddharth Pant

IPC: H02M7/483 ,  H02M7/5387 ,  H02M7/537 ,  H02M1/42

CPC classification number: H02M7/537 ,  H02M1/42 ,  H02M1/4216 ,  H02M7/487 ,  H02M7/5395 ,  H02M2001/327 ,  Y02B70/126

Abstract: Provided is a method for controlling operation of semiconductor gates in a power conversion system including one or more multilevel inverters coupleable to a modulator and a controller. The method includes generating, via the controller, a control signal responsive to an output current power factor associated with the inverters and producing a discontinuous pulse width modulation reference signal based upon the control signal and a target output power, the discontinuous pulse width modulation reference signal being indicative of shifting a phase angle between current and voltage. A gating signal is generated for output from the modulator, as a function of the reference signal and a carrier waveform. The gating signal adjusts the phase angle to prevent switching of the semiconductor gates.