| US 7,515,447 B2 | ||
| Method and arrangement in inverter | ||
| Teemu Ronkainen, Espoo (Finland); Veikko Hyvärinen, Helsinki (Finland); and Pekka Tiitinen, Vantaa (Finland) | ||
| Assigned to ABB OY, Helsinki (Finland) | ||
| Appl. No. 10/577,555 PCT Filed Oct. 29, 2004, PCT No. PCT/FI2004/000642 § 371(c)(1), (2), (4) Date Apr. 28, 2006, PCT Pub. No. WO2005/043618, PCT Pub. Date May 12, 2005. |
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| Claims priority of application No. 20031580 (FI), filed on Oct. 30, 2003. | ||
| Prior Publication US 2007/0097770 A1, May 03, 2007 | ||
| Int. Cl. H02M 1/00 (2007.01) | ||
| U.S. Cl. 363—141 | 10 Claims |
| 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 temperature of one or more power semiconductor components,
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 by slowing down a temperature increase rate as the temperature or the electric
quantity affecting the temperature increases and by slowing down a temperature decrease rate as the temperature or the electric
quantity affecting the temperature decreases.
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