Bidirectional buck-boost power converters
AssigneeGeneral Electric Company
InventorsRobert Louis Steigerwald, Luis Jose Garces, Matthew Christopher Bringman
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Abstract
A bidirectional buck-boost power converter 13 including a pair of inverter modules 14, 15 disposed at an output of a machine, and an inductor Lo connected between the pair of inverter modules 14, 15. A method for controlling a voltage output of a machine starter generator having an inverter rectifier and bidirectional buck-boost converter, includes outputting a dc voltage controlled by bidirectional buck-boost pulse width modulation (PWM) switching control, when the starter generator is in a generator mode.
Claims34
A bidirectional buck-boost power converter comprising:
- a pair of bidirectional half bridge buck-boost inverter modules disposed at an output of an AC starter generator machine;
- solely an inductor connected between said pair of bidirectional half bridge buck-boost inverter modules, wherein the bidirectional buck-boost power converter is devoid of energy storage capacitors that control a DC bus voltage;
- an inverter/rectifier connected between the output of the AC starter generator machine and said pair of half bridge buck-boost inverter modules;
- and
- a DC bus link high frequency bypass capacitor connected between the inverter/rectifier and said pair of bidirectional half bridge buck-boost inverter modules, the DC bus link high frequency bypass capacitor coupling the inverter/rectifier directly to the pair of bidirectional half bridge buck-boost inverter modules.
A bidirectional buck-boost power converter comprising:
- a pair of bidirectional half bridge buck-boost inverter modules disposed at an output of a wound field synchronous machine, wherein an inverter/rectifier is connected between the output of the wound field synchronous machine and said pair of bidirectional half bridge buck-boost inverter modules;
- solely an inductor connected between said pair of bidirectional half bridge buck- boost inverter modules;
- and
- a DC bus link high frequency bypass capacitor connected between the inverter/rectifier and said pair of bidirectional half bridge buck-boost inverter modules, the DC bus link high frequency bypass capacitor coupling the inverter/rectifier directly to the pair of bidirectional half bridge buck-boost inverter modules,
- wherein the wound field synchronous machine is configured to employ field control for steady-state regulation of an output voltage, and wherein the bidirectional buck-boost power converter is configured to:
- step up the output voltage during a transient operation, step down the output voltage during transient operations, step up the output voltage during steady state operations, and step down the output voltage during steady state operations, and further wherein the bidirectional buck-boost power converter is devoid of energy storage capacitors that control a DC bus voltage.
A bidirectional buck-boost power converter comprising:
- a pair of bidirectional full-bridge buck-boost inverter modules disposed at an output of an AC starter generator machine;
- solely a transformer connected between said pair of bidirectional full-bridge buck-boost inverter modules, wherein the bidirectional buck-boost power converter is devoid of energy storage capacitors that control a DC bus voltage;
- an inverter/rectifier connected between the output of the AC starter generator machine and said air of half bridge buck-boost inverter modules;
- and
- a DC bus link high frequency bypass capacitor connected between the inverter/rectifier and said pair of bidirectional half bridge buck-boost inverter modules the DC bus link high frequency bypass capacitor coupling the inverter/rectifier directly to the pair of bidirectional half bridge buck-boost inverter modules.
Dependencies are inferred from the claim text.