Patents by Inventor Andrew Joseph Roberts

Andrew Joseph Roberts has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • MOTOR DRIVE WITH SILICON CARBIDE MOSFET SWITCHES
    Publication number: 20180145602
    Abstract: Motor drive power conversion systems, including a filter circuit with a single inductor and a capacitor for each input phase, an active rectifier with silicon carbide rectifier switching devices and no precharge circuitry, a DC bus circuit with a film DC bus capacitor, an inverter to drive a load, and a controller to operate the rectifier switching devices at a PWM rectifier switching frequency of 10 kHz or more.
    Type: Application
    Filed: January 3, 2018
    Publication date: May 24, 2018
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Peizhong Yi, Andrew Joseph Roberts, Robert Allen Savatski