MOTOR WITH EMBEDDED POWER CONVERSION CIRCUIT, LIQUID PUMP IN WHICH THIS MOTOR WITH EMBEDDED POWER CONVERSION CIRCUIT IS INSTALLED, AIR CONDITIONER IN WHICH THIS LIQUID PUMP IS INSTALLED, WATER HEATER IN WHICH THIS LIQUID PUMP IS INSTALLED, AND EQUIPMENT IN WHICH MOTOR WITH EMBEDDED POWER CONVERSION CICUIT IS INSTALLED

摘要

To provide a motor with a built-in power conversion circuit and other apparatuses each of which is small in size with a superior heat-transferring characteristic, includes the power conversion circuit having a wide operating range, has an increased strength at a mechanical coupling between a main circuit device and a printed-circuit board, and reduces manufacturing cost.;A motor with a built-in power conversion circuit includes a cup 8 having a cylindrical shape with a closed end and providing a space therein in which a fluid flows, the cup 8 being provided on an inner side of a stator 9b such that the closed end is in contact with or in proximity to a printed-circuit board 1; and heat-transferring copper foil 13 provided over an area of a surface of the printed-circuit board 1 that is a reverse surface of a mounting surface having a main circuit device 2, the area facing the closed end of the cup 8. In the main circuit device 2, a heat spreader 21 is bonded to one of two surfaces of a device chip 20 included in a package, the one of the two surfaces facing toward the printed-circuit board 1 in an orientation for mounting onto the printed-circuit board 1. The heat spreader 21 is thermally and mechanically coupled to the heat-transferring copper foil 13 via a through hole 12 penetrating through the printed-circuit board 1.