Regenerative power control for passenger conveyors
First Claim
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1. A device for controlling power associated with a passenger conveyor motor, comprising:
- a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving; and
a controller that determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source,wherein the operating condition comprises current and the controller determines when the current exceeds a threshold.
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Abstract
An exemplary device for controlling power associated with a passenger conveyor motor includes a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving. The controller determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source.
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Citations
17 Claims
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1. A device for controlling power associated with a passenger conveyor motor, comprising:
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a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving; and a controller that determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source, wherein the operating condition comprises current and the controller determines when the current exceeds a threshold.
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2. A device for controlling power associated with a passenger conveyor motor, comprising:
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a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving; and a controller that determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source, wherein the operating condition comprises temperature and the controller determines when the temperature exceeds a threshold. - View Dependent Claims (3)
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4. A device for controlling power associated with a passenger conveyor motor, comprising:
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a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving; and a controller that determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source, comprising a bypass switch between the regenerative drive and the power source and wherein the controller controls the bypass switch to permit or prevent the regenerative drive from facilitating providing electricity to the power source.
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5. A device for controlling power associated with a passenger conveyor motor, comprising:
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a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving; and a controller that determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source, wherein the controller controls whether the regenerative drive facilitates providing the electricity to the power source dependent on a direction of movement of the passenger conveyor. - View Dependent Claims (6, 7, 8)
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9. A method of controlling power associated with a passenger conveyor motor, comprising the steps of:
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generating electricity from the motor when the passenger conveyor is moving; facilitating providing the electricity to a power source through a regenerative drive; determining when an operating condition of the regenerative drive is outside of a desired range and responsively preventing the regenerative drive from facilitating providing the electricity to the power source; and wherein the operating condition comprises current and the method comprises determining when the current exceeds a threshold. - View Dependent Claims (10, 12, 13, 14, 15, 16)
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11. The method of clam 10, wherein there is a heat sink associated with the regenerative drive and the method comprises detecting the temperature at the heat sink.
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17. A passenger conveyor, comprising:
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a plurality of steps; a motor associated with the steps for selectively moving the steps; a regenerative drive configured to facilitate providing electricity generated by the motor to a power source when the steps are moving; a controller that determines when at least one of a current or a temperature of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source; and a bypass switch between the regenerative drive and the power source and wherein the controller controls the bypass switch to permit or prevent the regenerative drive from facilitating providing electricity to the power source.
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Specification