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Timo Väätäinen

Pertti Seväkivi

Timo Koivuluoma

Vesa Tiihonen

A cooled base plate is provided for electric components. A first side of the cooled base plate is provided for attaching exothermal electric components thereto. On a second side of the base plate, opposite to the first side, there is embedded a cooling channel system having a cooling fluid inlet at a first end of the base plate and a cooling fluid outlet at a second end of the base plate. In order to minimize differences in temperature between the electric components, the thickness of the base plate increases in the direction from the inlet of the cooling channel system towards the outlet of the cooling channel system, e.g., in the flow direction of the cooling fluid, for at least a portion of the length of the base plate.

Cooled base plate for electric components

A load control apparatus adapted to indirectly detect an overcurrent, i.e. a current magnitude exceeding a predetermined limit value, occurring in an electric conductor element () belonging to a load current circuit (), on the basis of an increase in temperature. The load control apparatus () comprises a control current circuit including a temperature-sensitive switch member (S) capable of changing its operational state in response to an increase in the temperature to a predetermined value, and a control unit () adapted to detect a change in the operational state of the temperature-sensitive switch member (S), and to detect an overcurrent occurring in the electric conductor element () based thereon, the temperature-sensitive switch member (S) being adapted to be connected heat-conductively to a target element, in which at least part of the load current of the electric conductor element () passes in an operating situation, and the temperature-sensitive switch member (S) being further adapted to be electrically insulated from the electric conductor element () of the load current circuit.

Growing community of inventors

Espoo, Finland

Timo Väätäinen