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Method and arrangement in inverter

  • US 20070097770A1
  • Filed: 10/29/2004
  • Published: 05/03/2007
  • Est. Priority Date: 10/30/2003
  • Status: Active Grant
First Claim
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1. A method in connection with an inverter that comprises several power semiconductor components and a control apparatus to control them, the control apparatus being arranged to control the power semiconductor components in response to a control quantity to generate an output voltage, the method comprising the step of determining the temperature or an electric quantity affecting the temperate of one or more power semiconductor components, by wherein the method also comprising the steps of determining the change of the temperature or an electric quantity affecting the temperature of one or more power semiconductor components, and controlling with the control apparatus the power semiconductor components in response to both a control quantity to generate an output voltage and the change rate of the temperature or a quantity affecting the temperature of the power semiconductor components to reduce temperature variation in such a manner that, as the temperature or quantity affecting the temperature increases, the temperature increase rate is slowed down and, as the temperature or quantity affecting the temperature decreases, the temperature decrease rate is slowed down.

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