POWER SOURCE DEVICE FOR A.C. ELEVATOR

摘要

An AC elevator comprises power line (1), an inverter (3) operated by the pow er line (1) to generate AC power, and an electric motor driven by the inverter (3). A power supply includes a rechargeable battery (E), a power circuit (10 ) for charging and discharging the battery, and a control circuit (9) for controlling the operation of the power circuit (10) to control the input voltage to the inverter (3). The power regenerated by the electric motor charges the battery (E), which in turn drives the inverter (3).