System and method for operating a motor during normal and power failure conditions
First Claim
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1. A system comprising:
- a regenerative drive operable to deliver power to a motor from a main power supply during a normal operating condition and from a backup power supply during a power failure operating condition; and
a controller for operating the regenerative drive to provide available power on the regenerative drive to the backup power supply during the normal operating condition;
wherein the regenerative drive comprises a converter connected to a power bus, the converter operable to convert alternating current (AC) power from the main power supply into direct current (DC) power deliverable to the power bus and to step-up DC power at a first voltage from the backup power supply to a second voltage deliverable to the power bus.
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Abstract
A system continuously drives a motor during normal and power failure operating conditions. A regenerative drive delivers power to the motor from a main power supply during the normal operating condition and from a backup power supply during the power failure operating condition. A controller operates the regenerative drive to provide available power on the regenerative drive to the backup power supply during the normal operating condition.
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Citations
23 Claims
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1. A system comprising:
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a regenerative drive operable to deliver power to a motor from a main power supply during a normal operating condition and from a backup power supply during a power failure operating condition; and a controller for operating the regenerative drive to provide available power on the regenerative drive to the backup power supply during the normal operating condition; wherein the regenerative drive comprises a converter connected to a power bus, the converter operable to convert alternating current (AC) power from the main power supply into direct current (DC) power deliverable to the power bus and to step-up DC power at a first voltage from the backup power supply to a second voltage deliverable to the power bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a converter operable to convert alternating current (AC) power from a main power supply into direct current (DC) power; an inverter operable to drive a motor by converting the DC power from the converter into AC power and, when the motor is generating, to convert AC power produced by the motor to DC power; a power bus connected between the converter and the inverter to receive DC power from the converter and the inverter; and a circuit backup power supply connected between the main power supply and the converter, wherein the circuit is operable to disconnect the main power supply from the converter and connect the backup power supply to the converter in the event of a failure of the main power supply, and wherein the circuit is further operable to connect the backup power supply to the main power supply through the converter to charge the backup power supply. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method comprising:
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connecting a main power supply to a converter in a regenerative drive that drives a motor if the main power supply voltage is within a normal operating range; disconnecting the main power supply from the converter in the regenerative drive and connecting a backup power supply to the converter in the regenerative drive if the main power supply voltage is below the normal operating range; and charging the backup power supply from the main power supply by connecting the main power supply and the backup power supply through the converter in the regenerative drive if the backup power supply voltage is below a threshold voltage. - View Dependent Claims (20, 21, 22, 23)
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Specification