Maximum power point tracking method and apparatus
First Claim
1. A maximum power point tracking method, comprising:
- performing a power conversion operation by a converter through an inductor inside the converter according to a gating signal so as to convert an input electrical energy supplied by an energy source into an output electrical energy feeding to a load;
sensing an operation temperature of the converter;
obtaining at least one element characteristic according to the operation temperature so as to use the at least one element characteristic to monitor a voltage difference of the inductor;
calculating a characteristic value according to the voltage difference of the inductor; and
correspondingly adjusting the gating signal according to the characteristic value so as to track power of the input electrical energy of the energy source.
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Abstract
A maximum power point tracking (MPPT) apparatus and a MPPT method are disclosed. A converter uses an inductor therein to perform power conversion operations according to a gating signal so as to convert an input electrical energy into an output electrical energy to a load. A controller monitors the voltage difference of the inductor and the element temperature, performs a lookup table operation or calculates the element characteristic according to the element temperature, and further uses the element characteristic and the voltage difference of the inductor for calculating a characteristic value and correspondingly adjusts the gating signal according to the characteristic value so as to track the power of the input electrical energy.
38 Citations
40 Claims
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1. A maximum power point tracking method, comprising:
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performing a power conversion operation by a converter through an inductor inside the converter according to a gating signal so as to convert an input electrical energy supplied by an energy source into an output electrical energy feeding to a load; sensing an operation temperature of the converter; obtaining at least one element characteristic according to the operation temperature so as to use the at least one element characteristic to monitor a voltage difference of the inductor; calculating a characteristic value according to the voltage difference of the inductor; and correspondingly adjusting the gating signal according to the characteristic value so as to track power of the input electrical energy of the energy source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A maximum power point tracking apparatus, comprising:
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a converter, configured to perform a power conversion operation through an inductor inside the converter according to a gating signal so as to convert an input electrical energy supplied by an energy source into an output electrical energy feeding to a load; a temperature sensor, configured to sense an operation temperature of the converter; and a controller, coupled to the converter to provide the gating signal and coupled to the temperature sensor to obtain the operation temperature, wherein the controller obtains at least one element characteristic according to the operation temperature so as to use the at least one element characteristic to monitor a voltage difference of the inductor, and the controller calculates a characteristic value according to the voltage difference of the inductor and correspondingly adjusts the gating signal according to the characteristic value so as to track power of the input electrical energy of the energy source. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification