Control circuit of power converter and method for maximum power point tracking
First Claim
1. A control circuit of a power converter, the control circuit comprising:
- a first control module, setting a plurality of sampling points for a ripple signal of an input voltage of the power converter according to a reference signal, determining phase information of the ripple signal, and determining whether a power point of an energy generating system is a maximum power point according to a plurality of ripple voltages corresponding to the sampling points; and
a second control module, electrically connected to the first control module, and controlling the power converter to output a maximum power according to the maximum power point based on a determination result of the first control module and the reference signal, wherein the ripple voltages comprise a first ripple voltage and a second ripple voltage, and when the first ripple voltage is equal to the second ripple voltage, the first control module determines the power point of the energy generating system to be the maximum power point.
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Accused Products
Abstract
A control circuit of a power converter including a first and a second control modules is provided. The first control module sets sampling points for a ripple signal of an input voltage according to a reference signal. The first control module determines whether a power point is the maximum power point according to ripple voltages of the sampling points. The second control module controls the power converter to output a maximum power according to the maximum power point based on the determination result of the first control module and the reference signal. An embodiment of a method for tracking a maximum power point is provided. The input voltage of the power converter is measured. The sampling points are set for the ripple signal of the input voltage and phase information of the ripple signal is determined, such that the maximum power point is determined by using the ripple voltages.
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Citations
22 Claims
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1. A control circuit of a power converter, the control circuit comprising:
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a first control module, setting a plurality of sampling points for a ripple signal of an input voltage of the power converter according to a reference signal, determining phase information of the ripple signal, and determining whether a power point of an energy generating system is a maximum power point according to a plurality of ripple voltages corresponding to the sampling points; and a second control module, electrically connected to the first control module, and controlling the power converter to output a maximum power according to the maximum power point based on a determination result of the first control module and the reference signal, wherein the ripple voltages comprise a first ripple voltage and a second ripple voltage, and when the first ripple voltage is equal to the second ripple voltage, the first control module determines the power point of the energy generating system to be the maximum power point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for tracking a maximum power point, adapted to track the maximum power point of an energy generating system, the method for tracking the maximum power point comprising:
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receiving a ripple signal of an input voltage of a power converter; setting a plurality of sampling points for the ripple signal according to a reference signal, and determining phase information of the ripple signal; and determining whether a power point of the energy generating system is the maximum power point according to a plurality of ripple voltages corresponding to the sampling points, wherein the ripple voltages comprise a first ripple voltage and a second ripple voltage, and the step of determining whether the power point of the energy generating system is the maximum power point comprises determining the power point of the energy generating system to be the maximum power point when the first ripple voltage is equal to the second ripple voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification