Power supply for ac elevator
May 16, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBackup power circuit Elevator battery charging control Emergency drive device for an A.C. elevator Power recovery system and method for elevator apparatus Variable-voltage variable-frequency elevator control apparatus Method and apparatus for fault time operating of an elevator _ Elevator control system AC elevator control system Control apparatus for A.C. elevator Control apparatus for elevator Inventors
AssigneeApplicationNo. 10129131 filed on 05/16/2002US Classes:187/290, With auxiliary supply of electricity187/296Limited to power source (i.e., motor) utilizing A.C. powerExaminersPrimary: Salata, JonathanAttorney, Agent or FirmForeign Patent References
International ClassB66B 106AbstractAn a.c. elevator of the invention has a commercial power source (1), an inverter (3) operable with the power from the commercial power source (1) for generating a.c. power, and an electric motor to be driven with the a.c. power generated by the inverter (3). A power source device includes a rechargeable battery (E), a power source circuit (10) for charging and discharging the battery (E), and a control circuit (9) for controlling the voltage to be input to the inverter (3) by controlling the operation of the power source circuit (10). The battery (E) is charged with regenerative power from the motor, the power generated by the battery (E) is supplied to the inverter (3).Field of SearchWith auxiliary supply of electricityControls power source speed Limited to power source (i.e., motor) utilizing A.C. power Storage battery or accumulator Sources distributed along load circuit Dynamic braking Regenerative HAVING PLURAL, DIVERSE OR DIVERSELY CONTROLLED SOURCES A.C. and D.C. BATTERY-FED MOTOR SYSTEMS A.C. and D.C. Different voltages | |
