CHARGING EQUIPMENT OF VARIABLE FREQUENCY CONTROL FOR POWER FACTOR
First Claim
1. A charging equipment of variable frequency control for power factor, comprising:
- an AC-DC converter receiving AC power and converting it into DC power and outputting it;
a power factor calibration circuit including a switching device and calibrating the power factor of the DC power output from the AC-DC converter by the switching operation of the switching device and outputting it;
a DC-DC converter converting DC power output from the power factor calibration circuit into DC power for charging a battery and outputting the converted DC power; and
a power factor calibration circuit controller performing the switching control by varying the frequency of the pulse signal according to a load status of a battery output from a battery management system when performing a switching control on the switching devices of the power factor calibration circuit by modulating a pulse width of a pulse signal according to the DC power output from the power factor calibration circuit.
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Accused Products
Abstract
Disclosed herein is a charging equipment of variable frequency control for power factor. In addition, the present invention relates to a charging equipment of variable frequency control for power factor including: an AC-DC converter converting AC power into DC power; a DC-DC converter converting DC power output from the power factor calibration circuit into DC power for charging a battery and outputting the converted DC power; and a power factor calibration circuit calibrating power factor by the operation of the switching device and outputting the calibrated power factor; and a power factor calibration circuit controller performing the switching control by varying the frequency of the pulse signal when performing a switching control by modulating a pulse width of a pulse signal on the switching devices of the power factor calibration circuit, thereby making it possible to maintain the power factor even in the light load status.
48 Citations
10 Claims
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1. A charging equipment of variable frequency control for power factor, comprising:
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an AC-DC converter receiving AC power and converting it into DC power and outputting it; a power factor calibration circuit including a switching device and calibrating the power factor of the DC power output from the AC-DC converter by the switching operation of the switching device and outputting it; a DC-DC converter converting DC power output from the power factor calibration circuit into DC power for charging a battery and outputting the converted DC power; and a power factor calibration circuit controller performing the switching control by varying the frequency of the pulse signal according to a load status of a battery output from a battery management system when performing a switching control on the switching devices of the power factor calibration circuit by modulating a pulse width of a pulse signal according to the DC power output from the power factor calibration circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification