Digital control of power converters
AssigneeIllinois Institute of Technology
InventorsAlireza Khaligh, Young-Joo LEE, Ali EMADI
Life of this patent
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Abstract
A method of controlling a DC/DC converter to regulate an output voltage from an input voltage source that varies from a fully-charged voltage to a discharged voltage. The method introduced improves the dynamic response of the converter during transients by switching between different converter topologies to spread out voltage spikes, which are an inevitable result of transients. The invention also can improve the efficiency of the DC/DC converter by replacing higher loss modes with combination modes.
Claims18
A method of controlling a DC-DC converter to provide a desired output voltage from an input voltage which is different than the desired output voltage comprising:
- providing a switching frequency having a period to the DC-DC converter;
- operating the DC-DC converter in a first converting mode for each period the input voltage is greater than a first predetermined voltage level, wherein the first converting mode comprises a repeating of a first duty cycle pulse;
- operating the DC-DC converter in a second converting mode for each period the input voltage is less than a second predetermined voltage level, wherein the second voltage is less than the first voltage, wherein the second converting mode comprises a repeating of a second duty cycle pulse;
- operating the DC-DC converter in a third converting mode when the input voltage is less than the first predetermined voltage level and greater than the second predetermined voltage level, wherein the third converting mode comprises a combination configuration of the first duty cycle pulse and the second duty cycle pulse.
Dependencies are inferred from the claim text.