| 摘要 |
PURPOSE:To obtain the torque controlling circuit of a motor for preventing a motor rotating speed from being lowered at a normal time and using a battery capacity effectively. CONSTITUTION:When an excess load is worked on a motor in a state that current is fed to the motor 1, then the potential of the inversion input terminal of a comparator 28 is increased, and to AND gates 11, 61, the signal of a low level is fed, and so transistors 6, 56 are tuned OFF, and accordingly, the feed of current to the motor 1 is interrupted. Then, the potential of the inversion input terminal is lowered again, and so said working is inverted, and the current is fed to the motor 1. Accordingly, only when a load is worked on the motor, then by chopping feed current, motor torque is controlled, and so without losing a battery capacity, torque can be controlled, and at a normal time, a motor rotating speed is not delayed. |
