Patents by Inventor Martin Hagerdal

Martin Hagerdal 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).

  • Intermediate bus architecture power supply
    Patent number: 9362832
    Abstract: An intermediate bus architecture power supply system including an output voltage feedback-regulated, isolated first stage switching voltage converter (SVC) such as an intermediate bus converter, connected via an intermediate voltage bus (IVB) to at least one second stage DC-to-DC voltage converter. The first stage SVC is configured to adjust its switching duty cycle to compensate for voltage fluctuations on the IVB. The voltage regulation mechanism of the first stage SVC may thus suppress oscillations in the IVB voltage which originate from the first stage SVC's input or from fluctuations in the system's load current, and consequently reduce electromagnetic interference as well as the amplitude of voltage and current fluctuations on the IVB.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: June 7, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Magnus Karlsson, Oscar Persson, Henrik Borgengren, Martin Hägerdal, Gary Edmonds
  • INTERMEDIATE BUS ARCHITECTURE POWER SUPPLY
    Publication number: 20150244270
    Abstract: An intermediate bus architecture power supply system including an output voltage feedback-regulated, isolated first stage switching voltage converter (SVC) such as an intermediate bus converter, connected via an intermediate voltage bus (IVB) to at least one second stage DC-to-DC voltage converter. The first stage SVC is configured to adjust its switching duty cycle to compensate for voltage fluctuations on the IVB. The voltage regulation mechanism of the first stage SVC may thus suppress oscillations in the IVB voltage which originate from the first stage SVC's input or from fluctuations in the system's load current, and consequently reduce electromagnetic interference as well as the amplitude of voltage and current fluctuations on the IVB.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 27, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventors: Magnus Karlsson, Oscar Persson, Henrik Borgengren, Martin Hagerdal, Gary Edmonds