| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor driver which is of simple constitution and can be manufactured easily and is excellent in productivity and is inexpensive and enables the structure of a DC motor to be simplified and downsized. SOLUTION: In a motor driver for a DC brushless motor not using a current detector, etc., a heating element 35 constituting an inverter main circuit is installed at a metallic base plate 31. Moreover, this motor diver is constituted in the shape of a plate where metallic base plate 31 is set in the cavity 29 of the resin board where an inverter control circuit and a current phase detecting circuit are installed, and the metallic plate 31 is annexed. Then, each circuit phase of the metallic base plate 31 and the resin board 1 is connected with the other by an electric connection means. Hereby, the inverter main circuit, the inverter control circuit, and the current phase detecting circuit are integrated. |
