ELEVATOR CONTROL DEVICE

摘要

An elevator control device converts an AC power into a DC power by a rectifier (3), converts it into AC power by an inverter (5), and supplied the AC power via a power line (10) to field windings (32R, 32S, 32T) of a motor (16) synchronized with a permanent magnet. When deactivating the motor (16) synchronized with a permanent magnet, a switching element (7) of the inverter (5) is maintained in a closed state and a closed circuit is formed by the switching element (7), the power line (10), and the field windings (32R, 32S, 32T) of the motor so that a regenerative current flows into the closed circuit and a regenerative energy is consumed by the field windings, thereby effectively performing regenerative braking of the motor.