Multi-phase power converters and integrated choke therfor
First Claim
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1. A power conversion system, comprising:
- a filter circuit, comprising;
a plurality of AC input nodes coupleable with a multi-phase AC electrical power source for transfer of AC electrical power between the filter circuit and the power source,a multi-phase filter AC output, andan integrated choke assembly with;
a magnetic core structure comprising;
an outer structure with an integer number N outer portions spaced from a core structure center, N being greater than two, each outer portion having an outer portion width dimension, andan integer number N branch portions individually extending inward from the outer core structure toward the center, each branch portion having a branch portion width dimension greater than the outer portion width dimension, anda plurality of windings individually wound around a corresponding one of the outer portions, individual windings forming an inductance of the filter circuit;
a source-side converter comprising a plurality of converter AC nodes coupled with the multi-phase filter output, a DC output with first and second DC nodes, and a plurality of converter switching devices individually coupled between one of the converter AC nodes and one of the first and second DC nodes, the converter switching devices individually operative to selectively couple the corresponding converter AC node with the corresponding DC node according to a corresponding converter switching control signal;
an intermediate DC circuit comprising first and second DC current paths coupled with the first and second DC nodes of the converter; and
a switch control system 140 operative to provide the converter switching control signals to the converter.
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Abstract
Power conversion systems and integrated multi-phase chokes providing high common mode to differential mode choke inductance ratios with circular and triangular shapes for concurrent differential filtering and common-mode voltage blocking in motor drives and other power conversion applications.
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Citations
26 Claims
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1. A power conversion system, comprising:
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a filter circuit, comprising; a plurality of AC input nodes coupleable with a multi-phase AC electrical power source for transfer of AC electrical power between the filter circuit and the power source, a multi-phase filter AC output, and an integrated choke assembly with; a magnetic core structure comprising; an outer structure with an integer number N outer portions spaced from a core structure center, N being greater than two, each outer portion having an outer portion width dimension, and an integer number N branch portions individually extending inward from the outer core structure toward the center, each branch portion having a branch portion width dimension greater than the outer portion width dimension, and a plurality of windings individually wound around a corresponding one of the outer portions, individual windings forming an inductance of the filter circuit; a source-side converter comprising a plurality of converter AC nodes coupled with the multi-phase filter output, a DC output with first and second DC nodes, and a plurality of converter switching devices individually coupled between one of the converter AC nodes and one of the first and second DC nodes, the converter switching devices individually operative to selectively couple the corresponding converter AC node with the corresponding DC node according to a corresponding converter switching control signal; an intermediate DC circuit comprising first and second DC current paths coupled with the first and second DC nodes of the converter; and a switch control system 140 operative to provide the converter switching control signals to the converter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An integrated choke assembly, comprising:
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a core structure comprising a plurality of laminations with each lamination being a single piece including; an outer structure with an integer number N outer portions spaced from a core structure center, N being greater than two, each outer portion having an outer portion width dimension, and an integer number N branch portions individually extending inward from the outer core structure toward the center, each branch portion having a branch portion width dimension; and a plurality of windings individually wound around a corresponding one of the outer portions, individual windings forming an inductance. - View Dependent Claims (9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26)
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12. An integrated choke assembly, comprising:
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a core structure comprising; an outer structure with an integer number N outer portions spaced from a core structure center, N being greater than two, each outer portion having an outer portion width dimension, and an integer number N branch portions individually extending inward from the outer core structure toward the center, each branch portion having a branch portion width dimension greater than the outer portion width dimension; and a plurality of windings individually wound around a corresponding one of the outer portions, individual windings forming an inductance; where the outer structure is triangular with substantially straight outer portions spaced from the core structure center, and where the branch portions individually extend from a midpoint of the corresponding outer portion toward the center. - View Dependent Claims (13, 24, 25)
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Specification