| 摘要 |
PROBLEM TO BE SOLVED: To provide an elevator control device capable of supplying a power source satisfying a required driving voltage to an electric motor for driving an elevator car when a three-phase AC power source is interrupted and properly performing a rescuing operation. SOLUTION: When a three-phase AC power source 1 is interrupted during an operation of an elevator, a DC power source is supplied form a power source device for an automatic power interruption time implantation 6 to a PWM converter 3. A main control device 8 drives the PWM converter 3 as a four quadrant chopper circuit and performs a boosting control up to an electric motor required driving voltage for DC link voltage to be an output of the PWM converter 3. As a result, the required driving voltage of an electric motor is satisfied. |
