| 摘要 |
PROBLEM TO BE SOLVED: To simplify a current detection circuit by detecting the current of the drive circuit of an SR-type motor with a single current detection sensor. SOLUTION: The drive circuit of a motor is constituted by connecting a series circuit consisting of switching elements 1, 2, and 3 and 7, 8, and 9 that are connected in series at both terminals of armature coils 4, 5, and 6 between the plus and minus electrodes of a DC power supply 11. In this case, connection wires for connecting the switching elements 1, 2, and 3 and the armature coils 4, 5, and 6 are bundled and one current detection sensor 21 is provided, and the current of the armature coils 4, 5, and 6 is successively detected by the current detection sensor 21. Also, connection wires for connecting the armature coils 4, 5, and 6 and the switching elements 7, 8, and 9 may be bundled and a single current detection sensor may be provided. |
