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US 7,598,717 B2Granted
Current-sourced power supplies
AssigneeNorthrop Grumman Corporation
InventorKevin Thomas O'Meara
Life of this patent
Estimating the term…
Abstract
A method for providing stable dc-to-dc power conversion from high impedance or pure current input sources by inverting the duty cycle control with respect to the duty cycle control used with low impedance or pure voltage input sources.
Claims24
A method for producing DC-to-DC conversion from a current source, said method comprising the steps of:
- inputting a compliant source voltage and a constant source current from the current source into a DC-to-DC converter that is one of a current-sourced buck, current-sourced buck-boost, and current-sourced boost-buck DC-to-DC converter that includes a switch for converting the input voltage to a desired output voltage;
- and
- increasing the duty cycle of said switch in the DC-to-DC converter when the output voltage of the DC-to-DC converter exceeds a desired output voltage and decreasing the duty cycle of said switch when the output voltage of the DC-to-DC converter is less than the desired output voltage.
An apparatus for performing a DC-to-DC conversion comprising:
- a current source;
- a DC-to-DC converter that is one of a current-sourced buck, current-sourced buck-boost, and current-sourced boost-buck DC-to-DC converter comprising a compliant source voltage input, a constant source current input, and a switch for converting the input voltage to a desired output voltage;
- and
- a control circuit for increasing the duty cycle of said switch in the DC-to-DC converter when the output voltage of the DC-to-DC converter exceeds a desired output voltage and decreasing the duty cycle of said switch when the output voltage of the DC-to-DC converter is less than the desired output voltage.
1 more element
An apparatus for performing a DC-to-DC conversion comprising:
- means for providing a source current;
- means for producing one of current-sourced buck, current-sourced buck-boost, and current-sourced boost-buck DC-to-DC conversion having a compliant source voltage input and a constant source current input and including a switch for converting the input voltage to a desired output voltage;
- means for increasing the duty cycle of said switch in the DC-to-DC conversion means when the output voltage exceeds a desired output voltage and decreasing the duty cycle of said switch when the output voltage is less than the desired output voltage.
A method for producing DC-to-DC conversion, said method comprising the steps of:
- inputting a source voltage and a source current into a DC-to-DC converter that is one of a current-sourced buck, current-sourced buck-boost, and current-sourced boost-buck DC-to-DC converter via an input cable having a length such that the cable impedance is substantially greater than an input impedance of the dc-dc converter, said DC-to-DC converter including a switch for converting the input voltage to a desired output voltage;
- and
- increasing the duty cycle of said switch in the DC-to-DC converter when the output voltage of the DC-to-DC converter exceeds a desired output voltage and decreasing the duty cycle of said switch when the output voltage of the DC-to-DC converter is less than the desired output voltage.
An apparatus for performing a DC-to-DC conversion comprising:
- a power source;
- a DC-to-DC converter that is one of a current-sourced buck, current-sourced buck-boost, and current-sourced boost-buck DC-to-DC converter having a source voltage input and a source current input and including a switch for converting the input voltage to a desired output voltage;
- a cable having a length such that the cable impedance is substantially greater than an input impedance of the DC-to-DC converter, for inputting power from the power source into the source voltage input and the source current input of the DC-to-DC converter;
- a control circuit for increasing the duty cycle of said switch when the output voltage exceeds a desired output voltage and decreasing the duty cycle of said switch when the output voltage is less than the desired output voltage.
1 more element
Dependencies are inferred from the claim text.