POWER CONVERSION DEVICE AND REFRIGERATION/AIR-CONDITIONING SYSTEM
First Claim
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1. A power conversion device comprising:
- a power supply unit;
a booster unit that boosts a voltage supplied from the power supply unit by switching control;
a smoothing unit that smoothes an output voltage from the booster unit;
a backflow prevention element that is arranged between the booster unit and the smoothing unit to prevent a current reverse flow toward the booster unit; and
a commutation unit that is connected to the backflow prevention element in parallel to commutate a current flowing through the backflow prevention element in a predetermined period immediately before a short-circuit current begins to flow in response to the switching control of the booster unit.
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Abstract
A power conversion device according to the present invention includes a power supply, a booster unit (a reactor, a switch) that boosts a voltage supplied from the power supply by switching control, a smoothing circuit that smoothes an output voltage from the booster unit, a rectifier that is arranged between the booster unit and the smoothing circuit to prevent a current reverse flow toward the booster unit, and a commutation unit that is connected to the rectifier in parallel to commutate a current flowing through the rectifier toward itself.
27 Citations
22 Claims
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1. A power conversion device comprising:
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a power supply unit; a booster unit that boosts a voltage supplied from the power supply unit by switching control; a smoothing unit that smoothes an output voltage from the booster unit; a backflow prevention element that is arranged between the booster unit and the smoothing unit to prevent a current reverse flow toward the booster unit; and a commutation unit that is connected to the backflow prevention element in parallel to commutate a current flowing through the backflow prevention element in a predetermined period immediately before a short-circuit current begins to flow in response to the switching control of the booster unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification