Switching systems and methods for use in uninterruptible power supplies
First Claim
1. An uninterruptible power supply for providing an output power signal to a load comprising:
- a ferroresonant transformer;
a resonant capacitor operatively connected to the ferroresonant transformer; and
an inverter operatively connected to the ferroresonant transformer, wherein;
the inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having at least one change of phase and an upper limit; and
the at least one inverter control signal isheld in an OFF state during at least a portion of the at least one change of phase,pulse-width modulated during at least a portion of the at least one change of phase, andheld in an ON state when the output power signal is at the upper limit.
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Accused Products
Abstract
An uninterruptible power supply for providing an output power signal to a load comprises a ferroresonant transformer, a resonant capacitor, and an inverter. The resonant capacitor is operatively connected to the ferroresonant transformer. The inverter is operatively connected to the ferroresonant transformer. The inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having at least one change of phase and an upper limit. The at least one inverter control signal is held in an OFF state during at least a portion of the at least one change of phase, pulse-width modulated during at least a portion of the at least one change of phase, and held in an ON state when the output power signal is at the upper limit.
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Citations
11 Claims
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1. An uninterruptible power supply for providing an output power signal to a load comprising:
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a ferroresonant transformer; a resonant capacitor operatively connected to the ferroresonant transformer; and an inverter operatively connected to the ferroresonant transformer, wherein; the inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having at least one change of phase and an upper limit; and the at least one inverter control signal is held in an OFF state during at least a portion of the at least one change of phase, pulse-width modulated during at least a portion of the at least one change of phase, and held in an ON state when the output power signal is at the upper limit. - View Dependent Claims (2, 3, 4, 5)
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6. A method of providing an output power signal to a load comprising the steps of:
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operatively connecting a resonant capacitor to a ferroresonant transformer; operatively connecting an inverter to the ferroresonant transformer; configuring the inverter to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having at least one change of phase and an upper limit; holding the at least one inverter control signal in an OFF state during at least a portion of the at least one change of phase; pulse-width modulating the at least one inverter control signal during at least a portion of the at least one change of phase; and holding the at least one inverter control signal in an ON state when the output power signal is at the upper limit. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification