| 摘要 |
PROBLEM TO BE SOLVED: To simplify the circuitry by incorporating a switching circuit, a resonance capacitor, a switching means and a drive circuit into a single module. SOLUTION: A switching circuit comprising switching elements, i.e., NPN transistors Tu<+> , Tu<-> , Tv<+> , Tv<-> , Tw<+> , Tw<-> , is connected between terminals P, N for applying a DC voltage E and a DC brushless motor 1 is connected with the switching circuit. The transistors Tu<+> , Tu<-> are connected with resonance capacitors 11, the transistors Tv<+> , Tv<-> are connected with resonance capacitors 21, and the transistors Tw<+> , Tw<-> are connected with resonance capacitors 31. They are incorporated into a single module 30 together with auxiliary switches 13a, 13b, 23a, 23b, 33a, 33b, and a drive circuit 40. |
