| 摘要 |
PURPOSE:To set a brake torque to an arbitrary value by controlling ON or OFF two special transistors selected in a power inverter with the actual brake current as a negative feedback signal. CONSTITUTION:Two pulse signals PX output from a pulse generator 44 are input to a pulse switch 43, two output pulses not becoming the same phase and the same polarity of output pulses of a power inverter drive pulse generator 40 are selected, and only two transistors of transistors Q1-Q6 connected with the pulse signals are controlled ON or OFF. Assume that the two transistors are Q1 and Q6, the brake motor drive is supplied from a power source 2 through the transistor Q1 to an induction motor 4. Since the motor drive DC-excites by flowing the primary windings (a), (b), (c) in the special direction determined by selecting the transistor, the control torque can be arbitrarily controlled. |
