| 摘要 |
PURPOSE:To control to minimize the current ripple even in the charging, idling and discharging states by providing a current detecting resistor in series with a motor winding. CONSTITUTION:Switches 33, 35 are turned ON at the charging time, a load current flows in a circuit which has a power source 29, the switch 33, a winding 37, a detecting resistor 39 and the switch 35, and when the load current becomes the prescribed value, the switch 35 is opened to become an idle state. The load current flows in a circuit which has the switch 33, the winding 37, the detecting resistor 39 and a diode 41, and the current remains constant except the attenuation due to the resistance loss. Eventually, when the current flowed to the winding 37 is reduced, the switch 33 is opened to regenerate to a power source through a diode 45, the winding 37, the detecting resistor 39 and the diode 41. |
