| 摘要 |
PURPOSE:To reduce the side of the entire motor controlling system and to enhance the efficiency of the system by varying a loop gain in response to a load and suitably selecting the set speed of a motor in response to the load. CONSTITUTION:A multiplier generator 10 receives a control signal from a load type detector 11 and generates a gain control signal of a variable gain amplifier 5 obtained by multiplying K times by the control signal. Accordingly, the gain G of the amplifier 5 is varied in response to the type of a type wheel. When the amplifier 5 is controlled so that the G is increased in case of a heavy load and is decreased in case of a light load, a speed control signal outputted from a comparator 13 becomes small in case of the heavy load, thereby decelerating the speed of a DC motor 2, while when the load is light, the speed is accelerated. Consequently, the gain can be varied in response to the type of the type wheel of the load, thereby accurately controlling the speed. |
