| 摘要 |
PURPOSE:To obtain a motor speed regulator which can control the speed of a motor in normal and reverse directions with small space by switching and connecting separate current mirror pairs responsive to the normal and reverse rotation of the motor and a constant-voltage source via an interlock switch to a torque control resistor. CONSTITUTION:When the first to fourth switches 15-18 are switched as shown, a comparator 4 which compares a speed signal with a reference signal is connected to the input terminals of current mirror circuits 11, 12, a constant voltage source 13 is connected to a motor 6 and a torque controlling resistor 5, thereby controlling the speed of the motor 6 in normal direction. When the switches 15- 18 are switched to the other contacts, the comparator 4 is connected to current mirror circuits 1, 2, a constant voltage source 14 is connected to the motor 6 and the resistor 5, thereby controlling the speed of the motor in reverse direction. In this manner, the motor can be controlled at the speed in normal and reverse directions, thereby obtaining a motor speed regulator having small space. |
