| 摘要 |
A control apparatus for an A.C. elevator wherein regenerative power produced from an induction motor is consumed within the motor. In case of causing the induction motor to generate a braking torque, current to be supplied to the induction motor is controlled in accordance with a current command value having a frequency which does not generate regenerative power and an amplitude which is based on a torque command. Thus, the regenerative power is prevented from arising in the slowdown mode and unloaded operation of the elevator, and a good controllability is attained without spoiling a comfortable ride. |
