Power conversion apparatus for DC/DC conversion using dual active bridges
First Claim
1. DC/DC static power conversion apparatus comprising:
- (a) an input converter adapted to receive a DC source voltage from a DC source and containing a plurality of active gate controlled gate turn-off switching elements connected in a bridge configuration to allow the DC input voltage to be converted to an AC output voltage at the output of the converter;
(b) a transformer with primary and secondary windings and leakage inductance, the primary connected to receive the output of the input converter;
(c) an output converter connected to the secondary of the transformer for converting the AC voltage at the secondary of the transformer to a DC output voltage at the output of the converter, the output converter containing a plurality of gate controlled active gate turn-off switching elements arranged in a bridge configuration to allow the AC input to be converted to the DC output voltage from the converter; and
(d) control means connected to the gates of the input converter switching elements and the gates of the output converter switching elements for controlling the input converter switching elements in a soft-switched manner to convert the DC source voltage to an AC output voltage at a selected frequency at the output of the input converter, and for controlling the switching of the output converter switching elements in a soft-switched manner to convert the AC input voltage at the selected frequency at the input of the output converter to a DC voltage at the output of the output converter, the switching of the input converter and output converter switching elements being controlled to provide a phase difference between the voltages at the primary and secondary of the transformer which yields a desired output voltage and power level from the output converter.
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Accused Products
Abstract
A DC/DC power converter suitable for high power applications has an input converter which converts the DC input voltage to an AC voltage and supplies this voltage to a transformer. The output of the transformer is provided to an output converter which converts the AC to a DC output voltage at a controlled level to a load. Both the input and output converters are composed of active gate controlled switching devices and are switched in a soft-switched manner to minimize switching losses and increase switching frequency. The converters can be implemented in single phase or polyphase configurations and can be controlled to closely maintain the output voltage provided to the load at a desired level.
251 Citations
11 Claims
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1. DC/DC static power conversion apparatus comprising:
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(a) an input converter adapted to receive a DC source voltage from a DC source and containing a plurality of active gate controlled gate turn-off switching elements connected in a bridge configuration to allow the DC input voltage to be converted to an AC output voltage at the output of the converter; (b) a transformer with primary and secondary windings and leakage inductance, the primary connected to receive the output of the input converter; (c) an output converter connected to the secondary of the transformer for converting the AC voltage at the secondary of the transformer to a DC output voltage at the output of the converter, the output converter containing a plurality of gate controlled active gate turn-off switching elements arranged in a bridge configuration to allow the AC input to be converted to the DC output voltage from the converter; and (d) control means connected to the gates of the input converter switching elements and the gates of the output converter switching elements for controlling the input converter switching elements in a soft-switched manner to convert the DC source voltage to an AC output voltage at a selected frequency at the output of the input converter, and for controlling the switching of the output converter switching elements in a soft-switched manner to convert the AC input voltage at the selected frequency at the input of the output converter to a DC voltage at the output of the output converter, the switching of the input converter and output converter switching elements being controlled to provide a phase difference between the voltages at the primary and secondary of the transformer which yields a desired output voltage and power level from the output converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification