Patent ID: 6320776
Filing Date: 2001-11-20
Classification: H02M

Abstract:
A power drive apparatus comprising,a main circuit board including an input terminal block for connection to power-source wires mounted on a major surface of said main circuit board;a power module including a converter unit having diodes and an inverter unit having switching devices and diodes, the power module, mounted on the other major surface of said main circuit board, being for converting and outputting electric power supplied through said input terminal block;a heat-dissipating plate, connected with said power module in contact with a surface of said power module opposite to said main circuit board, for dissipating heat generated by said power module; anda filter module including a filter substrate provided with a filter circuit, and being disposed in the middle of an interconnecting path between said input terminal block and an input section of said converter unit, for suppressing the transmission of noise generated by said switching devices to a power source side,wherein said heat-dissipating plate provides therein a concave space, and said filter module is received in said concave space and is detachably mounted on said heat-dissipating plate.