| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor drive control device capable of preventing, in a simple configuration, a regenerative current from flowing into a drive circuit of a motor during inertia rotation in the case of rotation stop.SOLUTION: A motor drive control device 1 includes: a motor drive part 2; a switching circuit part 4 disposed between a motor 20 and an output end of the motor drive part 2; and a control circuit part 3. In response to path switching signals Seu, Sev and Sew outputted from the control circuit part 3, the switching circuit part 4 switches a first current path L1 connecting coils and the output end and a second current path L2 connecting coils and a ground regarding coils Lu, Lv and Lw of phases of the motor 20. When normally driving the motor 20, the first current path L1 for the coils Lu, Lv and Lw of the phases is brought into a conducted state. When stopping the rotation of the motor 20, regarding a coil that was being electrified just before the stop, the first current path L1 is cut off and the second current path L2 is brought into a conducted state. |
