A plurality of circuit boards (31), (34) are stacked at a side end wall (15), located an opposite side to an output shaft portion (14) of rotation shaft of electric motor, of a motor housing (11). Besides a circuit board fixing portion (26) for the one circuit board (34), heat-releasing member (38) that thermally connects one surface of the circuit board (34) and a metal cover (12) covering the circuit board (34) is provided between the one surface of the circuit board (34) and the metal cover (12). Besides connecting the circuit board (34) to the circuit board fixing portion (26), by thermally connecting the one surface of the circuit board (34) and the metal cover (12) through the heat-releasing member (38), it is possible to adequately release heat generated from a transistor, then influence of heat on electronic circuit element that is susceptible to heat can be suppressed.
ELECTRIC DRIVING DEVICE AND ELECTRIC POWER STEERING DEVICE
2021-05-13
Patent
Electronic Resource
English
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