Prediction scheme for step wave power converter and inductive inverter topology
First Claim
1. A step wave power converter comprising:
- multiple different bridge circuits configured to convert DC voltage inputs into AC voltage outputs; and
a processor configured to;
estimate an average voltage output from the multiple different bridge circuits for controlling current output from the multiple different bridge circuits;
identifying how many of the bridge circuits are needed to provide the estimated average output voltage; and
controlling the identified bridge circuits during the next switching period to generate a combined inverter output voltage that corresponds with the estimated average output voltage, wherein the average output voltage is estimated according to;
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Accused Products
Abstract
A step wave power converter comprises multiple different bridge circuits configured to convert DC voltage inputs into AC voltage outputs. A controller is configured to estimate an average voltage output from the multiple different bridge circuits for controlling the current output from the multiple different bridge circuits. The number of bridge circuits needed to provide the estimated average output voltage is identified and the identified bridge circuits controlled during a next switching period to generate a combined inverter output voltage that corresponds with the estimated average output voltage.
In another embodiment, one or more transformers are associated with the different bridge circuits. Inductors are coupled between the bridge circuits and the primary windings of the associated transformers. The inductors filter the current output from the bridge circuits prior to feeding the current into the transformers.
118 Citations
20 Claims
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1. A step wave power converter comprising:
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multiple different bridge circuits configured to convert DC voltage inputs into AC voltage outputs; and a processor configured to; estimate an average voltage output from the multiple different bridge circuits for controlling current output from the multiple different bridge circuits; identifying how many of the bridge circuits are needed to provide the estimated average output voltage; and controlling the identified bridge circuits during the next switching period to generate a combined inverter output voltage that corresponds with the estimated average output voltage, wherein the average output voltage is estimated according to; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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using multiple different bridge circuits in a power inverter to convert one or more DC voltage sources into an AC voltage for coupling to a power grid; predicting an output voltage for the inverter for a next switching period according to a measured power grid voltage and measured inverter load current for a switching period; identifying what bridge circuits are needed to substantially produce the predicted output voltage for a next switching period; and activating the identified bridge circuits to substantially output the predicted output voltage while shunting outputs for any non-identified bridge circuits. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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one or more bridge circuits in a power inverter configured to convert one or more DC voltage sources into an AC voltage for coupling to a power grid; logic circuitry configured to; predict an output voltage for the inverter for a next switching period according to a measured power grid voltage and a measured inverter load current for a switching period; identify what bridge circuits are needed to substantially produce the predicted output voltage for a next switching period; and activate the identified bridge circuits to substantially output the predicted output voltage. - View Dependent Claims (18, 19, 20)
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Specification