Fuzzy logic based sliding mode control of variable voltage converter
First Claim
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1. A vehicle comprising:
- a DC-DC converter including an inductor and outputting a voltage based on a signal; and
a controller programmed to generate the signal as a sum of an open-loop estimate to achieve a reference voltage and a term that drives a ratio of a first difference between a reference current and a current through the inductor to a second difference between the reference voltage and the voltage to a predetermined value.
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Abstract
A DC-DC converter for a vehicle includes a controller programmed to, in response to changes in an output voltage of the converter, adjust a control signal that controls an output voltage of the DC-DC converter to drive a ratio of a first error between a reference current and a current through the inductor to a second error between a voltage reference and the output voltage to a predetermined value.
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Citations
17 Claims
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1. A vehicle comprising:
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a DC-DC converter including an inductor and outputting a voltage based on a signal; and a controller programmed to generate the signal as a sum of an open-loop estimate to achieve a reference voltage and a term that drives a ratio of a first difference between a reference current and a current through the inductor to a second difference between the reference voltage and the voltage to a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A DC-DC converter comprising:
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an inductor; at least one switching device controlled by a duty cycle; and a controller programmed to output the duty cycle as a sum of an open-loop estimate to achieve a reference voltage and a term that drives a ratio of a first difference between a reference current and a current through the inductor to a second difference between the reference voltage and an output voltage to a predetermined value. - View Dependent Claims (9, 10, 11, 12)
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13. A method for controlling a DC-DC converter comprising:
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estimating, by a controller, an open-loop value for a control signal for the DC-DC converter to achieve a reference voltage; changing, by the controller, the control signal to achieve a predetermined value for a ratio of a first difference between a reference current and a current through an inductor to a second difference between a voltage reference and an output voltage; and converting, by the DC-DC converter, an input voltage to the output voltage according to the control signal. - View Dependent Claims (14, 15, 16, 17)
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Specification