Multiphase converter apparatus and method
First Claim
1. An ac/ac converter for accepting a pulsating dc input with encoded sinusoidal modulation and providing a multiphase modulated output, the converter comprising:
- a bridge comprising a plurality of switches having switch legs for modulating the pulsating dc input at a carrier frequency over a plurality of phases, said bridge being coupled at one end to a pulsating dc source and coupled at another end to a modulated signal output;
a controller for the plurality of switches for causing, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency.
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Accused Products
Abstract
An ac/ac converter for accepting a pulsating dc input with encoded sinusoidal modulation and providing a multiphase modulated output. The converter comprises a bridge including a plurality of switches having switch legs for modulating the pulsating dc input at a carrier frequency over a plurality of phases. The bridge is coupled at one end to a pulsating dc source and coupled at another end to a modulated signal output. A controller is provided for the plurality of switches for causing, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency.
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Citations
19 Claims
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1. An ac/ac converter for accepting a pulsating dc input with encoded sinusoidal modulation and providing a multiphase modulated output, the converter comprising:
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a bridge comprising a plurality of switches having switch legs for modulating the pulsating dc input at a carrier frequency over a plurality of phases, said bridge being coupled at one end to a pulsating dc source and coupled at another end to a modulated signal output; a controller for the plurality of switches for causing, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An inverter comprising:
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a front-end high frequency dc/dc converter stage coupled to a power source; and an ac/ac converter coupled to said front-end high frequency dc/dc converter stage; wherein said ac/ac converter comprises a bridge including a plurality of switches having switch legs for modulating an input signal from said front-end high frequency dc/dc converter stage at a carrier frequency over a plurality of phases, said bridge being coupled at one end to said front-end high frequency dc/dc converter stage and coupled at another end to a modulated signal output, and a controller for the plurality of switches for causing, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the input signal at the carrier frequency while the other switch legs do not modulate the input signal at the carrier frequency. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A soft-switching device comprising:
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first and second front-end single-phase bridges; a high-frequency transformer coupled to said first and second front-end single-phase bridges; an ac/ac converter coupled to an output of said high-frequency transformer; wherein said ac/ac converter comprises; a bridge comprising a plurality of switches having switch legs for modulating the transformer output at a carrier frequency over a plurality of phases, said bridge being coupled at one end to said transformer and coupled at another end to a modulated signal output; a controller for the plurality of switches for causing, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency. - View Dependent Claims (16)
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17. An ac/ac converter for accepting a pulsating dc input with encoded sinusoidal modulation and providing a multiphase modulated output, the converter comprising:
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means for modulating the pulsating dc input at a carrier frequency over a plurality of phases, said means for modulating comprising a plurality of switches having switch legs; means for controlling said means for modulating such that, for each of the plurality of phases, under unity power factor, one of the switch legs modulates the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency. - View Dependent Claims (18)
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19. A method for providing a multiphase modulated output from a pulsating dc input with encoded sinusoidal modulation, the method comprising:
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receiving the pulsating dc input by a plurality of switches having switch legs for modulating the pulsating dc input at a carrier frequency over a plurality of phases; controlling the plurality of switches to cause, for each of the plurality of phases, under unity power factor, one of the switch legs to modulate the pulsating dc input at the carrier frequency while the other switch legs do not modulate the pulsating dc input at the carrier frequency.
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Specification