Patents by Inventor Gunnar R. Holmquist

Gunnar R. Holmquist 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).

  • AC output power supply with digital feedback loop
    Patent number: 7502697
    Abstract: An AC power supply includes a digital feedback loop for output regulation. The feedback loop generates an RMS control signal that is mixed with a desired waveform to produce an input for a feedback loop that generates an instantaneous control signal. The instantaneous control signal is used to regulate power supply output.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: March 10, 2009
    Assignee: Programmable Division of Xantrex Technology, Inc.
    Inventors: Gunnar R. Holmquist, Liyu Cao, Daniel D. Zuck
  • DIGITALLY IMPLEMENTED POWER SUPPLY SUPERVISORIES
    Publication number: 20080103633
    Abstract: Power supplies include digital supervisory circuits that detect faults and control power supply operation. The supervisory control algorithms are user programmable so that the supervisory function can be easily manipulated by the power supply user for different applications of the power supply.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 1, 2008
    Inventors: Gunnar R. Holmquist, Daniel D. Zuck
  • AC output power supply with digital feedback loop
    Publication number: 20080082277
    Abstract: An AC power supply includes a digital feedback loop for output regulation. The feedback loop generates an RMS control signal that is mixed with a desired waveform to produce an input for a feedback loop that generates an instantaneous control signal. The instantaneous control signal is used to regulate power supply output.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Inventors: Gunnar R. Holmquist, Liyu Cao, Daniel D. Zuck
  • BANDWIDTH AND OUTPUT IMPEDANCE CONTROL IN A POWER SUPPLY
    Publication number: 20080080218
    Abstract: A power supply includes a feedback loop allowing user control of bandwidth and output impedance. The feedback may combine both voltage feedback and current feedback. Control of power supply bandwidth and impedance allows legacy power supply emulation in automated test systems.
    Type: Application
    Filed: November 22, 2006
    Publication date: April 3, 2008
    Inventors: Gunnar R. Holmquist, Liyu Cao
  • Power supply with digital feedback loop
    Publication number: 20080079406
    Abstract: A power supply with digital feedback loop that is configured to generate a digital voltage error signal and a digital current error signal and to select one of the digital voltage error signal and the digital current error signal for regulating one or both of power supply output voltage and power supply output current.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Inventors: Gunnar R. Holmquist, Liyu Cao, Daniel D. Zuck