Elevator control device
First Claim
1. An elevator control device comprising:
- a wind-up mechanism, comprising a multi-winding motor having first and second windings provided on either side of a sheave;
first and second power converters which supply power to the first and second windings respectively;
a short-circuiting unit which short-circuits the output sides of the first and second power converters; and
a control unit which, when one of the first and second power converters has broken down, stops the operation of the broken-down power converter, allows the short-circuiting unit to perform a short-circuit operation, and allows a rescue operation to be carried out to the wind-up mechanism by supplying power from the other power converter to the first and second windings.
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Accused Products
Abstract
When there is a breakdown in either one of first and second power converters supplying electrical power to a multi-winding motor comprising a wind-up mechanism, a rescue operation can be safely and reliably carried out by using the remaining power converter. A wind-up mechanism comprises a two-winding motor having first and second windings, and, during normal operation, power is supplied to the first and second windings from first and second inverters respectively. When the first inverter has broken down due to excessive current, first and second contactors are switched off, and a third contactor comprising a short-circuiting unit is switched on. Consequently, both windings receive power from the second inverter, enabling the rescue operation to be carried out without causing vibrations.
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Citations
5 Claims
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1. An elevator control device comprising:
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a wind-up mechanism, comprising a multi-winding motor having first and second windings provided on either side of a sheave;
first and second power converters which supply power to the first and second windings respectively;
a short-circuiting unit which short-circuits the output sides of the first and second power converters; and
a control unit which, when one of the first and second power converters has broken down, stops the operation of the broken-down power converter, allows the short-circuiting unit to perform a short-circuit operation, and allows a rescue operation to be carried out to the wind-up mechanism by supplying power from the other power converter to the first and second windings. - View Dependent Claims (2, 3, 4, 5)
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Specification