| 摘要 |
PURPOSE:To eliminate that an induction motor driven by an inverter is turned reversely when it is stopped while it is being brakes by the inverter. CONSTITUTION:When an operating-sequence signal F-RUN for an inverter is finished, an operating frequency (f) and a voltage V for the inverter are set to a free-running state, the deceleration operation of the title motor by the state is performed for a time T1. The title motor is operated at a frequency f1 and a voltage V1, it is decelerated down to an extremely low voltage V2 at a frequency 0 by a cushion characteristic, and, lastly, it is DC-braked at the voltage V2. |
