Three phase high power factor converter using phase selection circuit
First Claim
1. An active circuit for delivering three phase AC input power received from a three phase rectifier to a DC/DC converter, comprising:
- a phase selection switching circuit, coupled to said rectifier, that selects an inner phase of said three phase AC input power; and
a switching network, coupled to said phase selection switching circuit and said rectifier, that controls a waveshape of said inner phase and a waveshape of at least one other phase, thereby to reduce harmonics associated with said three phase AC input power.
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Accused Products
Abstract
For use in a DC/DC converter fed by a three phase rectifier, an active circuit and method for delivering an inner phase of three phase AC input power provided to the rectifier and a power converter employing the active circuit or the method. The active circuit includes: (1) a phase selection switching circuit, coupled to the rectifier, that selects an inner phase of the three phase AC input power and (2) a switching network, coupled to the phase selection switching circuit, that controls a waveshape of at least the inner phase to the DC/DC converter thereby to reduce harmonics associated with the three phase AC input power.
39 Citations
20 Claims
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1. An active circuit for delivering three phase AC input power received from a three phase rectifier to a DC/DC converter, comprising:
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a phase selection switching circuit, coupled to said rectifier, that selects an inner phase of said three phase AC input power; and a switching network, coupled to said phase selection switching circuit and said rectifier, that controls a waveshape of said inner phase and a waveshape of at least one other phase, thereby to reduce harmonics associated with said three phase AC input power. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. For use in a DC/DC converter fed by a three phase rectifier, a method of delivering an inner phase of three phase AC input power provided to said rectifier, comprising the steps of:
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selecting an inner phase of said three phase AC input power; and controlling a waveshape of said inner phase to said DC/DC converter thereby to reduce harmonics associated with said three phase AC input power. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A power converter, comprising:
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a three phase rectifier; a DC/DC converter, coupled to said three phase rectifier, that receives rectified power therefrom; and an active circuit to deliver an inner phase of three phase AC input power provided to said rectifier, including; a controller synchronized to voltages of said three phase AC input power, a phase selection switching circuit, coupled to said rectifier and said controller, that selects an inner phase of said three phase AC input power, and a switching network, coupled to said phase selection switching circuit, that controls a waveshape of said inner phase to said DC/DC converter thereby to reduce harmonics associated with said three phase AC input power. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification