CONVERTER
First Claim
1. A converter, configured to be connected between a direct current system and an alternating current system for mutual conversion between a direct current and an alternating current, wherein the converter comprises a switching network, a filter, and a control unit, the switching network comprises a first switching circuit and a second switching circuit, the control unit is configured to output a control signal to the switching network, the switching network is configured to convert, into multiple-levels voltage according to the control signal that is output by the control unit, a direct current that is output by the direct current system, and the filter is configured to output an alternating current to the alternating current system according to the multiple levels;
- the first switching circuit comprises M energy storage elements and M bridge arm circuits, one of the M bridge arm circuits comprises one full-controlled component, remaining M-1 bridge arm circuits each comprise two full-controlled components that are reversely connected in series, and M is an integer greater than or equal to 1;
a first end of an ith bridge arm circuit in the M bridge arm circuits is connected to a first end of an (i+1)th bridge arm circuit in the M bridge arm circuits by using an ith energy storage element in the M energy storage elements, a first end of an Mth bridge arm circuit in the M bridge arm circuits is connected to a first end of the filter by using an Mth energy storage element in the M energy storage elements, a second end of each of the M bridge arm circuits is connected to a second end of the filter, and i is an integer that is greater than or equal to 1 and less than M;
the second switching circuit comprises N energy storage elements and N bridge arm circuits, one of the N bridge arm circuits comprises one full-controlled component, remaining N-1 bridge arm circuits each comprise two full-controlled components that are reversely connected in series, and N is an integer greater than or equal to 4-M;
a first end of a jth bridge arm circuit in the N bridge arm circuits is connected to a first end of a (j+1)th bridge arm circuit in the N bridge arm circuits by using a jth energy storage element in the N energy storage elements, a first end of an Nth bridge arm circuit in the N bridge arm circuits is connected to the first end of the filter by using an Nth energy storage element in the N energy storage elements, a second end of each of the N bridge arm circuits is connected to the second end of the filter, and j is an integer that is greater than or equal to 1 and less than N; and
each full-controlled component in the N bridge arm circuits and the M bridge arm circuits is connected to the control unit, and the control unit is specifically configured to control turning-on and turning-off of each full-controlled component.
1 Assignment
0 Petitions
Accused Products
Abstract
A converter, configured to be connected between a direct current system and an alternating current system for mutual conversion between a direct current and an alternating current, includes a switching network, a filter, and a control unit. The switching network includes a first switching circuit and a second switching circuit. The first switching circuit includes M energy storage elements and M bridge arm circuits, one of the M bridge arm circuits includes one full-controlled component, and remaining M-1 bridge arm circuits each include two full-controlled components that are reversely connected in series. The second switching circuit includes N energy storage elements and N bridge arm circuits, one of the N bridge arm circuits includes one full-controlled component, and remaining N-1 bridge arm circuits each include two full-controlled components that are reversely connected in series.
3 Citations
10 Claims
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1. A converter, configured to be connected between a direct current system and an alternating current system for mutual conversion between a direct current and an alternating current, wherein the converter comprises a switching network, a filter, and a control unit, the switching network comprises a first switching circuit and a second switching circuit, the control unit is configured to output a control signal to the switching network, the switching network is configured to convert, into multiple-levels voltage according to the control signal that is output by the control unit, a direct current that is output by the direct current system, and the filter is configured to output an alternating current to the alternating current system according to the multiple levels;
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the first switching circuit comprises M energy storage elements and M bridge arm circuits, one of the M bridge arm circuits comprises one full-controlled component, remaining M-1 bridge arm circuits each comprise two full-controlled components that are reversely connected in series, and M is an integer greater than or equal to 1; a first end of an ith bridge arm circuit in the M bridge arm circuits is connected to a first end of an (i+1)th bridge arm circuit in the M bridge arm circuits by using an ith energy storage element in the M energy storage elements, a first end of an Mth bridge arm circuit in the M bridge arm circuits is connected to a first end of the filter by using an Mth energy storage element in the M energy storage elements, a second end of each of the M bridge arm circuits is connected to a second end of the filter, and i is an integer that is greater than or equal to 1 and less than M; the second switching circuit comprises N energy storage elements and N bridge arm circuits, one of the N bridge arm circuits comprises one full-controlled component, remaining N-1 bridge arm circuits each comprise two full-controlled components that are reversely connected in series, and N is an integer greater than or equal to 4-M; a first end of a jth bridge arm circuit in the N bridge arm circuits is connected to a first end of a (j+1)th bridge arm circuit in the N bridge arm circuits by using a jth energy storage element in the N energy storage elements, a first end of an Nth bridge arm circuit in the N bridge arm circuits is connected to the first end of the filter by using an Nth energy storage element in the N energy storage elements, a second end of each of the N bridge arm circuits is connected to the second end of the filter, and j is an integer that is greater than or equal to 1 and less than N; and each full-controlled component in the N bridge arm circuits and the M bridge arm circuits is connected to the control unit, and the control unit is specifically configured to control turning-on and turning-off of each full-controlled component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A converter, configured to be connected between a direct current system and an alternating current system for mutual conversion between a direct current and an alternating current, wherein the converter comprises a switching network, a filter, and a control unit, the switching network comprises three energy storage elements and four bridge arm circuits, the first bridge arm circuit and the fourth bridge arm circuit in the four bridge arm circuits each comprise one full-controlled component, and the second bridge arm circuit and the third bridge arm circuit in the four bridge arm circuits each comprise two full-controlled components that are reversely connected in series;
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a first end of the first bridge arm circuit is connected to a first end of the second bridge arm circuit by using the first energy storage element in the three energy storage elements, the first end of the second bridge arm circuit is connected to a first end of the filter by using the second energy storage element in the three energy storage elements, a first end of the third bridge arm circuit is connected to the first end of the filter, a first end of the fourth bridge arm circuit is connected to the first end of the filter by using the third energy storage element in the three energy storage elements, and second ends of all the four bridge arm circuits are connected to a second end of the filter; and each full-controlled component in the four bridge arm circuits is connected to the control unit, and the control unit is configured to control turning-on and turning-off of each full-controlled component. - View Dependent Claims (10)
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Specification