| 摘要 |
<p>PURPOSE:To enable to detect reversely induced voltage without influence to the inductance component of a motor by composing a bridge circuit of a motor, a resistor and a coil. CONSTITUTION:A bridge circuit is composed of resistors 3, 4, 5, a coil 2 and a motor 1, and a voltage of the connecting point of the motor 1 and the coil 2 and a voltage of the connecting point of the resistors 4, 5 are applied to a differential amplifier 9. An error amplifier 11 produces the deviation between the output of a variable resistor 10 and the output of the amplifier 9 to a Schmitt trigger 12. The trigger 12 interrupts a transistor 7 when the current value flowed through the motor 1 detected by the resistor 3 exceeds the upper side slice level, and conducts the transistor 7 when it is lowered beyond the lower side slice level.</p> |
