POWER CONVERTING DEVICE, MOTOR DRIVING DEVICE, AND REFRIGERATING AND AIR-CONDITIONING APPARATUS
First Claim
1. A power converting device comprising:
- one or more backflow preventing elements that prevent electric current from flowing backward from a load side toward a power supply;
a commutating unit for performing a commutation operation for causing electric current to flow toward a different path that is connected in parallel with the one or more backflow preventing elements;
a malfunction detector for detecting a malfunction of the commutating unit; and
a controller that performs operation control related to protection of the commutating unit on a basis of detection by the malfunction detector.
1 Assignment
0 Petitions
Accused Products
Abstract
A power converting device includes a rectifying circuit that rectifies voltage of an alternating-current power supply; smoothing means that smoothes output voltage from the rectifying circuit; short-circuiting means that is disposed more closely to the alternating-current power supply than the smoothing means and that short-circuits the alternating-current power supply and controls at least one of electric current and voltage; a reactor that is disposed more closely to the alternating-current power supply than the short-circuiting means; one or more backflow preventing elements that prevent electric current from flowing backward from a load side toward the alternating-current power supply; commutating means for performing a commutation operation for causing electric current to flow toward a different path that is connected in parallel with the one or more backflow preventing elements; malfunction detecting means for detecting a malfunction of the commutating means; and switching control means that performs operation control of the commutating means in accordance with detection by the malfunction detecting means.
42 Citations
20 Claims
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1. A power converting device comprising:
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one or more backflow preventing elements that prevent electric current from flowing backward from a load side toward a power supply; a commutating unit for performing a commutation operation for causing electric current to flow toward a different path that is connected in parallel with the one or more backflow preventing elements; a malfunction detector for detecting a malfunction of the commutating unit; and a controller that performs operation control related to protection of the commutating unit on a basis of detection by the malfunction detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20)
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18. A power converting device comprising:
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a rectifying circuit that rectifies voltage of the power supply; a smoothing unit that smoothes output voltage from the rectifying circuit; a short-circuiting unit that is disposed more closely to the power supply than the smoothing unit and that short-circuits the power supply and controls at least one of electric current and voltage; and a reactor that is disposed more closely to the power supply than the short-circuiting unit.
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Specification