Patents by Inventor Michael Nyström

Michael Nyström 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).

  • Synchronous start-up of parallel power converters in a switched-mode power supply
    Patent number: 9548669
    Abstract: Methods and apparatuses for controlling synchronous start-up of power converters arranged in parallel in droop load share switched-mode power supplies are described. In one embodiment, a method may be performed by circuitry in a DC-DC power converter. The DC-DC power converter includes an inverting switch that converts input DC power to intermediate AC power, a transformer coupled to the inverting switch to receive the intermediate AC power and provide stepped-down AC power, and a synchronous rectifier coupled to the transformer to convert the stepped-down AC power to output DC power. The method comprises detecting that the inverting switch is not switching during start-up of the DC-DC power converter, and increasing a reference voltage set point of the DC-DC power converter in response to detecting that the inverting switch is not switching to force the inverting switch to start switching.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: January 17, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Michael Nyström
  • SYNCHRONOUS START-UP OF PARALLEL POWER CONVERTERS IN A SWITCHED-MODE POWER SUPPLY
    Publication number: 20160336867
    Abstract: Methods and apparatuses for controlling synchronous start-up of power converters arranged in parallel in droop load share switched-mode power supplies are described. In one embodiment, a method may be performed by circuitry in a DC-DC power converter. The DC-DC power converter includes an inverting switch that converts input DC power to intermediate AC power, a transformer coupled to the inverting switch to receive the intermediate AC power and provide stepped-down AC power, and a synchronous rectifier coupled to the transformer to convert the stepped-down AC power to output DC power. The method comprises detecting that the inverting switch is not switching during start-up of the DC-DC power converter, and increasing a reference voltage set point of the DC-DC power converter in response to detecting that the inverting switch is not switching to force the inverting switch to start switching.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 17, 2016
    Inventor: Michael Nyström