| 摘要 |
PURPOSE:To generate sufficient brake torque by detecting a current based on an electromotive force generated by the inertial rotation, and generating a brake current circulated in a motor by the amplifying operation of an amplifier. CONSTITUTION:Since the rotor of a motor 30 continues to rotate by the inertia, a motor 30 operates as a generator, and an electromotive force is generated in reverse direction to the current flowed from a power source. As a result, the current based on the electromotive force circulates as a base current I0 of a transistor 34. On the other hand, a large current of the DC current amplification factor times of the transistor 34 is flowed between the emitter and the collector of the transistor 34 in this manner, this is circulated to the motor 30 and becomes a brake current I for generating a control torque. |
