CONVERTER CIRCUIT AND MOTOR DRIVE APPARATUS, AIR-CONDITIONER, REFRIGERATOR, AND INDUCTION HEATING COOKER PROVIDED WITH THE CIRCUIT
First Claim
1. A converter circuit, including:
- a rectifier that rectifies an AC voltage;
a first converter section that is connected with the output of said rectifier and has a first reactor, a first switching element, and a first reverse current prevention element;
a second converter section that is connected with the output of said rectifier, that has a second reactor, a second switching element, and a second reverse current prevention element, and that is connected with said first converter section in parallel;
switching control means that controls said first and second switching elements; and
a smoothing capacitor that is provided at the output of said first and second converter sections, whereinsaid switching control means switches the current mode of the current flowing through said first and second reactors to any of a continuous mode, a critical mode, or a discontinuous mode based on a predetermined condition.
1 Assignment
0 Petitions
Accused Products
Abstract
To obtain a converter circuit capable of being made to be small and light-weighted and reducing switching loss, a motor drive control apparatus, an air-conditioner, a refrigerator, and an induction heating cooker provided with the circuit.
There are provided: a step-up converter 3a including a rectifier 2, a step-up reactor 4a, a switching element 5a, and a reverse current prevention element 6a; a step-up converter 3b having a step-up reactor 4b, a switching element 5b, and a reverse current prevention element 6b and connected in parallel with the step-up converter 3a; switching control means 7 that controls switching elements 5a and 5b; and a smoothing capacitor that is provided at the output of the step-up converters 3a and 3b. The switching control means 7 switches the current mode of the current flowing through the step-up reactors 4a and 4b into any of a continuous mode, a critical mode, and a discontinuous mode based on a predetermined condition.
77 Citations
33 Claims
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1. A converter circuit, including:
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a rectifier that rectifies an AC voltage; a first converter section that is connected with the output of said rectifier and has a first reactor, a first switching element, and a first reverse current prevention element; a second converter section that is connected with the output of said rectifier, that has a second reactor, a second switching element, and a second reverse current prevention element, and that is connected with said first converter section in parallel; switching control means that controls said first and second switching elements; and a smoothing capacitor that is provided at the output of said first and second converter sections, wherein said switching control means switches the current mode of the current flowing through said first and second reactors to any of a continuous mode, a critical mode, or a discontinuous mode based on a predetermined condition. - View Dependent Claims (2, 3, 4, 5, 6, 23, 25, 27, 30, 31, 32, 33)
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7. A converter circuit, including:
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a rectifier that rectifies an AC voltage; a first converter section that is connected with the output of said rectifier and has a first reactor, a first switching element, and a first reverse current prevention element; a second converter section that is connected with the output of said rectifier, that has a second reactor, a second switching element, and a second reverse current prevention element, and that is connected with said first converter section in parallel; switching control means that controls said first and second switching elements; a smoothing capacitor that is provided at the output of said first and second converter sections; first opening and closing means that opens and closes the output of said first converter section; second opening and closing means that opens and closes the output of said second converter section; opening and closing control means that controls opening and closing of said first and second opening and closing means, wherein said opening and closing control means opens and closes at least one of said first opening and closing means and second opening and closing means based on a predetermined condition to operate either said first or second converter section, or both. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. (canceled)
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15. (canceled)
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16. (canceled)
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17. (canceled)
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18. (canceled)
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19. (canceled)
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20. (canceled)
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21. (canceled)
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22. (canceled)
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28. (canceled)
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29. (canceled)
Specification