Emergency apparatus for elevator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHideo Uchino, Masami Nomura, Takaaki Aoi, Masumi Kanbe
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Abstract
An emergency apparatus for elevator which converts a DC power into an AC power by an inverter device in an emergency state to feed the AC power to an AC traction motor and an AC motor for door-opening and closing which have different rated voltages so as to drive a cage of the elevator and to open and close a door of the cage comprises selectively feeding a power through said inverter device to either of said traction motor or said motor for door-opening and closing, in an emergency state.
Claims5
In an emergency apparatus for operating an elevator which converts a DC power into an AC power by an inverter device in an emergency state to feed the AC power to an AC traction motor and AC motor for door-opening and closing with each of said motors having different rated voltages so as to drive a cage of the elevator and to open and close a door of the cage, an improvement which comprises:
- means for selectively feeding a power through said inverter device to either of said traction motor or said motor for door-opening and closing, in an emergency state;
- and
- an oscillation circuit for varying the frequency of the output of said inverter device in the feeding of the AC power.
Dependencies are inferred from the claim text.