| 摘要 |
PURPOSE:To always correct the temperature for variations in any temperature in a DC motor by providing a correcting voltage generator which outputs slope signals having different change rates in response to the variation in the temperature in the motor. CONSTITUTION:A correcting voltage generator which outputs slope signals VA, VB having different change rates in response to the variation in the temperature in a DC motor 1 is provided in a trigger circuit 4. When the internal temperature of the motor 1 is higher than TS, it becomes VA>VB, the output of an operational amplifier OP becomes positive to turn a transistor Q1 ON, and a slope signal VB is supplied to a trigger point C. When it is lower than the TS, it becomes VA<VB, the output of the amplifier OP becomes negative to turn ON a transistor Q2, and a slope signal VA is supplied to the trigger point C. Thus, a voltage applied to a charging circuit 5 is corrected by the variation in the temperature in the motor 1. |
