Switch mode power supply and method for operating the switch mode power supply

  • US 10,756,641 B2
  • Filed: 05/15/2012
  • Issued: 08/25/2020
  • Est. Priority Date: 07/26/2011
  • Status: Active Grant
First Claim
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1. A switch mode power supply, comprising:

  • a switch element; and

    a control for operative coupling to a DC link of a converter having a main contactor electrically connected to an auxiliary contactor which is electrically connected in series with a resistor, the control controlling the switch element and the switch mode power supply being electrically connected in parallel to a capacitor of the DC link;

    wherein the switch mode power supply has a start-up delay such that control of the switch element is blocked during the start-up delay, after a DC link voltage, applied to an input-side of the switch mode power supply, at the DC link reaches a specified threshold value, and is blocked during the start-up delay until a predetermined start delay period (T), which is longer than a time interval for charging the DC link, has elapsed.

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