Electromechanical propulsion system having a wireless power transfer system
First Claim
1. An elevator system comprising:
- an elevator car including an electrically powered car subsystem;
a guide rail constructed and arranged to guide the elevator car along a hoistway and in a direction of travel;
a plurality of primary windings positioned along the hoistway;
a permanent magnet coupled to the elevator car, the plurality of primary windings and the permanent magnet defining an electromechanical propulsion system for imparting motion to the elevator car in response to a drive excitation; and
a secondary winding coupled to the elevator car and disposed adjacent to the permanent magnet along the direction of travel, and wherein the secondary winding is configured to utilize an excitation switching frequency ripple to generate a current to power the car subsystem.
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Accused Products
Abstract
An elevator system includes an elevator car having an electrically powered car subsystem. A guide rail of the elevator system is constructed and arranged to guide the elevator car along a hoistway and in a direction of travel. An electromechanical propulsion system includes plurality of primary windings positioned along the hoistway, and a permanent magnet coupled to the elevator car for imparting motion to the elevator car in response to a drive excitation. A secondary winding is coupled to the elevator car and disposed adjacent to the permanent magnet along the direction of travel, and wherein the secondary winding is configured to utilize an excitation switching frequency ripple to generate a current to power the car subsystem.
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Citations
22 Claims
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1. An elevator system comprising:
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an elevator car including an electrically powered car subsystem; a guide rail constructed and arranged to guide the elevator car along a hoistway and in a direction of travel; a plurality of primary windings positioned along the hoistway; a permanent magnet coupled to the elevator car, the plurality of primary windings and the permanent magnet defining an electromechanical propulsion system for imparting motion to the elevator car in response to a drive excitation; and a secondary winding coupled to the elevator car and disposed adjacent to the permanent magnet along the direction of travel, and wherein the secondary winding is configured to utilize an excitation switching frequency ripple to generate a current to power the car subsystem. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless power supply comprising:
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a plurality of primary windings including a first winding having a first excitation current and an adjacent second winding having a second excitation current, and wherein the first excitation current includes a first base frequency component and a first ripple frequency component, and the second excitation current includes a second base frequency component and a second ripple frequency component; and a secondary winding configured to utilize an excitation switching frequency ripple to generate a current, and wherein and the first and second ripple frequency components are associated with the secondary winding and the excitation switching frequency ripple for wireless power transfer. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification