| 摘要 |
PURPOSE:To improve the accuracy of a speed control by zero-holding a suppressor at the time of switching normal/reverse converter. CONSTITUTION:A DC motor is controlled at its speed by two sets of power converters connected in anti-parallel. Its controller is composed of a speed regulator 14, a current regulator 16, a suppressor 23 of an integrator, a limiter 25, etc. A zero-holding contact 30 is provided in the suppressor 23, and turned ON, OFF by a command from a switching command calculator 22. As a result, the suppressor 23 is zero-held by the ON of the contact 30 to abruptly reduce a current command value to zero. |
