Scheme for operation of step wave power converter
First Claim
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1. A step wave power converter comprising:
- a processor configured to;
operate bridge circuits;
modulate at least one direct current DC input with the bridge circuits to form multiple individual voltage steps of a step wave Alternating Current (AC) output;
associate different carrier waves with the bridge circuits that have frequencies that are multiple times greater than a frequency of a reference waveform and are independent of the voltage steps of the AC output formed by the bridge circuits; and
modulate with the bridge circuit variable width pulses onto the voltage steps of the AC output according to a comparison of the carrier waves with different points in the reference waveform.
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Abstract
A step wave power converter includes a plurality of transformers each configured to receive a Direct Current (DC) voltage from one or more independently generated power sources. Each transformer comprising a primary winding and a secondary winding. A plurality of bridge circuits control different DC voltage inputs from one of the multiple independently generated power sources into the primary windings. One or more processors are configured to use a Phase-Shifted Carrier Pulse Width Modulation (PSCPWM) scheme to operate the bridge circuits in order to produce steps for a step wave Alternating Current (AC) output from the secondary windings.
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Citations
20 Claims
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1. A step wave power converter comprising:
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a processor configured to; operate bridge circuits; modulate at least one direct current DC input with the bridge circuits to form multiple individual voltage steps of a step wave Alternating Current (AC) output; associate different carrier waves with the bridge circuits that have frequencies that are multiple times greater than a frequency of a reference waveform and are independent of the voltage steps of the AC output formed by the bridge circuits; and modulate with the bridge circuit variable width pulses onto the voltage steps of the AC output according to a comparison of the carrier waves with different points in the reference waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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receiving a Direct Current (DC) voltage input at a step wave power converter; converting the DC voltage input into a plurality of steps of a step wave Alternating Current (AC) waveform; comparing one or more carrier waves associated with the steps of the AC waveform with one or more reference waves; and modulating variable width pulses onto the steps of the step wave AC waveform according to the comparison between the carrier waves and the reference waves. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus, comprising:
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a modulation circuit configured to; compare reference waveform values with phase shifted carrier waveform values; selectively connect and disconnect a DC voltage to generate DC voltage step waves of an Alternating Current (AC) output; and generate variable width pulses on either side of the DC voltage step waves according to the comparison between the reference waveform values with the carrier waveform values. - View Dependent Claims (18, 19, 20)
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Specification