Capactive power circuit
AssigneeThe Texas A&M University System
InventorMehrdad Ehsani
Life of this patent
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Abstract
A circuit for controlling power to a capacitive load includes a DC power source coupled in series with an inductor and the capacitive load. The inductor provides for resonant charging of the capacitive load from the DC source. A second inductor is used for resonantly discharging the capacitive load back to the power source. Solid state switches are included for selectively activating the charging and discharging of the capacitive load. An energy absorbing load is selectively coupled across the capacitive load to remove any residual voltage after a discharging process.
Claims15
A power circuit for use in powering a capacitive load, comprising:
- a DC voltage source coupled with the capacitive load;
- a first inductor in series with the capacitive load, coupled between the capacitive load and said DC source;
- a first solid state switch in series with said first inductor coupled between the capacitive load and said DC source, said first switch permitting current flow in a first direction from said DC source toward the capacitive load;
- a second inductor in series with the capacitive load, coupled between the capacitive load and said DC source;
- a second solid state switch in series with said second inductor coupled between the capacitive load and said DC source said second switch permitting current flow in a second direction from the capacitive load toward said DC source;
- a rectifier in series with said first solid state switch coupled between said first inductor and said first switch, said rectifier being biased to permit current flow in said first direction;
- and
- trigger circuitry for selectively activating said solid state switches, respectively, to thereby selectively charge the capacitive load and selectively discharge the capacitive load.
A power circuit for controlling power to a plurality of capacitive loads, comprising:
- a DC voltage source;
- a first inductor, in series with the capacitive loads between the capacitive loads and said DC source;
- a plurality of first solid state switches in series with said first inductor, each said first switch being in series with one of the capacitive loads coupled between the capacitive load and said DC source, each said first switch permitting current flow in a first direction from said DC source toward each capacitive load;
- a second inductor in series with the capacitive loads between the capacitive loads and said DC source;
- a plurality of second solid state switches in series with said second inductor, each said second switch being in series with one of the capacitive loads coupled between the capacitive load and said DC source, each said second switch permitting current flow in a second direction from each capacitive load toward said DC source;
- a first rectifier in series with said plurality of first switches, said first rectifier being biased to permit current flow in said first direction;
- a second rectifier in series with said plurality of said second switches, said second rectifier being biased to permit current flow in said second direction;
- and
- trigger circuitry for selectively activating said solid state switches, respectively, to thereby charge the capacitive loads and discharge the capacitive loads in a preselected sequence.
Dependencies are inferred from the claim text.