Patents Assigned to Yasakawa America, Inc.
  • Patent number: 8605469
    Abstract: A voltage source inverter comprises a rectifier having an input for connection to a multi-phase AC power source and converting the AC power to DC power at an output. An inverter receives DC power and converts the DC power to AC power. A DC bus is connected between the rectifier circuit and the inverter circuit to provide a relatively fixed DC voltage for the inverter. A bus capacitor is across the DC bus. A soft charge circuit limits inrush current to the bus capacitor. The soft charge circuit comprises an input inductor for each phase connected between the rectifier input and the AC power source and a clamping circuit across each input inductor to limit DC bus voltage.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: December 10, 2013
    Assignee: Yasakawa America, Inc.
    Inventor: Mahesh Swamy