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Teemu Ronkainen

Markku Talja

Simo Pöyhönen

Marko Raatikainen

Veikko Hyvärinen

Pekka Tiitinen

Juha Mikkola

A method and arrangement in connection with an inverter that comprises several power semiconductor components and a control apparatus arranged to control them is disclosed. The method comprises the steps 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 the temperature increase rate as the temperature or quantity affecting the temperature increases and by slowing down the temperature decrease rate as the temperature or quantity affecting the temperature decreases.

Method and arrangement in inverter

A choke arrangement and a method in conjunction with an inverter, the phase output of the inverter being configured to be composed of two or more parallel branches, each of which comprises an upper (V, V, V) and a lower (V, V, V) power semiconductor component at the output, the upper one of which being coupled to a positive voltage of a direct voltage intermediate circuit and the lower to a negative voltage, the components being in series, the output of each branch being composed of a point between the components. The arrangement comprises branch-specific single-phase chokes (L, L, L), the first ends of which chokes are arranged to be coupled to the outputs of the power semiconductor components and the second ends together to form the phase output of the inverter.

Output choke arrangement for inverter, and method in conjunction therewith

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Espoo, Finland

Teemu Ronkainen