Emergency apparatus for elevator
First Claim
1. 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.
1 Assignment
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Accused Products
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.
35 Citations
5 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification