Elevator wireless power transfer system
First Claim
1. An elevator system, comprising:
- an elevator car disposed in and arranged to move along a hoistway extending in an axial direction;
a secondary resonant coil mounted to the elevator car and configured to get induced an electro-motive force and output a voltage or current;
a plurality of primary resonant coils distributed along the hoistway and configured to transmit power to the secondary resonant coil when a primary resonant coil of the plurality of resonant coils is adjacent to the secondary resonant coil and is selectively energized;
a control system configured to select and energize the plurality of primary resonant coils, the control system including a plurality of switches with each one of the plurality of switches being associated with a respective one of the plurality of primary resonant coils, and wherein the plurality of switches selectively close to energize a selected one of the plurality of primary resonant coils associated with a location of the elevator car; and
a plurality of permanent magnets carried by the elevator car, and wherein the plurality of primary resonant coils are configured to sequentially propel the elevator car in the hoistway when proximate to the plurality of permanent magnets.
1 Assignment
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Accused Products
Abstract
An elevator system includes a car arranged to move along a hoistway and a wireless power transfer system that includes a secondary resonant coil mounted to the car and configured to induce an electro-motive force and output a voltage or current, and a plurality of primary resonant coils distributed along the hoistway and configured to transmit power to the secondary resonant coil when a primary resonant coil is adjacent to the secondary resonant coil and is selectively energized. A control system of the wireless power transfer system is configured to select and energize the plurality of primary resonant coils, and includes a plurality of switches with each one being associated with a respective one of the plurality of primary resonant coils. The plurality of switches are configured to selectively close to energize a selected one of the plurality of primary resonant coils associated with a location of the car.
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Citations
15 Claims
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1. An elevator system, comprising:
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an elevator car disposed in and arranged to move along a hoistway extending in an axial direction; a secondary resonant coil mounted to the elevator car and configured to get induced an electro-motive force and output a voltage or current; a plurality of primary resonant coils distributed along the hoistway and configured to transmit power to the secondary resonant coil when a primary resonant coil of the plurality of resonant coils is adjacent to the secondary resonant coil and is selectively energized; a control system configured to select and energize the plurality of primary resonant coils, the control system including a plurality of switches with each one of the plurality of switches being associated with a respective one of the plurality of primary resonant coils, and wherein the plurality of switches selectively close to energize a selected one of the plurality of primary resonant coils associated with a location of the elevator car; and a plurality of permanent magnets carried by the elevator car, and wherein the plurality of primary resonant coils are configured to sequentially propel the elevator car in the hoistway when proximate to the plurality of permanent magnets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power transfer system for inductively transferring power to an elevator car constructed to move in a hoistway, the wireless power transfer system comprising:
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a secondary resonant coil mounted to the elevator car and configured to get induced an electro-motive force and output a current; a plurality of primary resonant coils distributed along the hoistway and configured to transmit power to the secondary resonant coil when a primary resonant coil of the plurality of resonant coils is proximate to the secondary resonant coil and is selectively energized; a power source configured to output a power; and a high frequency converter configured to convert the power to a high frequency power having a frequency with a range of 1 kHz to 1 MHz and outputting the high frequency power to the primary resonant coil. - View Dependent Claims (13, 14, 15)
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Specification