POWER CONVERSION APPARATUS AND METHOD OF CONTROLLING THE SAME
First Claim
1. A power conversion apparatus comprising:
- a series circuit including a first switching element and a second switching element, the series circuit being connected to a DC power source in parallel;
a resonant circuit including a capacitor and a primary winding of a transformer, the resonant circuit being connected to one of the first and second switching elements in parallel;
an intermittent signal generator configured to generate an intermittent signal of triggering an intermittent operation according to an external instruction or a load connected to a secondary winding of the transformer;
a controller configured to control the start and stop of a switching operation of the first and second switching elements according to the intermittent signal from the intermittent signal generator;
a current detector configured to detect a resonant current passing through the resonant circuit; and
a timing generator configured to generate a timing signal when the resonant current detected by the current detector satisfies a resonant condition, wherein after the switching operation of the first and second switching elements is suspended according to the intermittent signal from the intermittent signal generator, the controller resumes the switching operation in response to the timing signal from the timing generator.
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Accused Products
Abstract
A power conversion apparatus includes a series circuit having a first switching element and a second switching element, the series circuit being connected to a DC power source in parallel, a resonant circuit including a capacitor and a primary winding of a transformer, the resonant circuit being connected to one of the first and second switching elements in parallel, an intermittent signal generator, a controller to control the start and stop of a switching operation of the first and second switching elements according to the intermittent signal, a current detector to detect a resonant current passing through the resonant circuit, and a timing generator to generate a timing signal when the detected resonant current satisfies a resonant condition. After the switching operation of the first and second switching elements is suspended according to the intermittent signal, the controller resumes the switching operation in response to the timing signal.
20 Citations
5 Claims
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1. A power conversion apparatus comprising:
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a series circuit including a first switching element and a second switching element, the series circuit being connected to a DC power source in parallel;
a resonant circuit including a capacitor and a primary winding of a transformer, the resonant circuit being connected to one of the first and second switching elements in parallel;
an intermittent signal generator configured to generate an intermittent signal of triggering an intermittent operation according to an external instruction or a load connected to a secondary winding of the transformer;
a controller configured to control the start and stop of a switching operation of the first and second switching elements according to the intermittent signal from the intermittent signal generator;
a current detector configured to detect a resonant current passing through the resonant circuit; and
a timing generator configured to generate a timing signal when the resonant current detected by the current detector satisfies a resonant condition, wherein after the switching operation of the first and second switching elements is suspended according to the intermittent signal from the intermittent signal generator, the controller resumes the switching operation in response to the timing signal from the timing generator. - View Dependent Claims (2, 3, 4)
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5. A method of controlling a power conversion apparatus that includes a series circuit having a first switching element and a second switching element, the series circuit being connected to a DC power source in parallel, a resonant circuit including a capacitor and a primary winding of a transformer, the resonant circuit being connected to one of the first and second switching elements in parallel, an intermittent signal generator configured to generate an intermittent signal of instructing an intermittent operation according to one of an external instruction and a load connected to a secondary winding of the transformer, and a controller configured to control, according to the intermittent signal from the intermittent signal generator, the start and stop of a switching operation of the first and second switching elements, comprising:
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detecting a resonant current passing through the resonant circuit;
generating a timing signal when the detected resonant current satisfies a resonant condition; and
after the switching operation of the first and second switching elements is suspended according to the intermittent signal from the intermittent signal generator, resuming the switching operation in response to the generated timing signal.
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Specification