POWER-CONVERSION CONTROL SYSTEM INCLUDING SLIDING MODE CONTROLLER AND CYCLOCONVERTER
First Claim
1. A power-conversion control system comprising:
- an inverter operable to receive a DC voltage input and produce a first AC voltage output having a first frequency;
a cycloconverter having a plurality of bidirectional switches, and being operable to receive the first AC voltage and to synthesize a second AC voltage having a second frequency that is lower than the first frequency; and
a sliding mode controller operable to provide a control signal to command the plurality of bidirectional switches to turn OFF and ON when the first AC voltage is at a zero crossing condition, and operable to selectively adjust the frequency and amplitude of the second AC voltage.
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Accused Products
Abstract
A power-conversion control system includes an inverter, a cycloconverter, and a sliding mode controller. The inverter is operable to receive a DC voltage input and produce a first AC voltage output having a first frequency. The cycloconverter has a plurality of bidirectional switches, and is operable to receive the first AC voltage and to synthesize a second AC voltage having a second frequency that is lower than the first frequency. The sliding mode controller is operable to provide a control signal to command the plurality of bidirectional switches to turn OFF and ON when the first AC voltage is at a zero crossing condition. The sliding mode controller is also operable to selectively adjust the frequency and amplitude of the second AC voltage.
91 Citations
18 Claims
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1. A power-conversion control system comprising:
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an inverter operable to receive a DC voltage input and produce a first AC voltage output having a first frequency; a cycloconverter having a plurality of bidirectional switches, and being operable to receive the first AC voltage and to synthesize a second AC voltage having a second frequency that is lower than the first frequency; and a sliding mode controller operable to provide a control signal to command the plurality of bidirectional switches to turn OFF and ON when the first AC voltage is at a zero crossing condition, and operable to selectively adjust the frequency and amplitude of the second AC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of providing alternating current to a load, comprising:
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converting a DC voltage into a first AC voltage having a first frequency; commanding a plurality of switches in a cycloconverter turn OFF or ON to synthesize a second AC voltage having a second frequency that is lower than the first frequency, wherein the plurality of switches are turned OFF or ON when first AC voltage is at a zero crossing condition; and selectively adjusting a rate at which the plurality of switches are turned OFF and ON in response to a voltage feedback signal and a current feedback signal to minimize a difference between the voltage feedback signal and a desired voltage. - View Dependent Claims (17, 18)
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Specification