Charging equipment of variable frequency control for power factor
A technology of charging equipment and frequency control, which is applied in the direction of converting DC power input to DC power output, output power conversion device, collector, etc., and can solve the problems of reducing power conversion efficiency and power consumption of power factor correction circuits.
Inactive Publication Date: 2012-05-16
SAMSUNG ELECTRO MECHANICS CO LTD
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[0011] However, in the charging apparatus according to the related art, since the power factor correction circuit controller switches the switching device of the power factor correction circuit by using a pulse width modulation scheme, the switching device has the same power in the light load state as in the heavy load state. switching frequency, while the power dissipation in the power factor correction circuit is relatively large, reducing the power conversion efficiency more significantly for light loads than for heavy loads
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[0030] Various objects, advantages and features of the present invention will be apparent from the following description of embodiments with reference to the accompanying drawings.
[0031] The terms and words used in this specification and claims should not be construed as limited to the general meaning or dictionary definition, but should be based on the concept that the inventor can properly define the terms to describe what he or she knows to implement the present invention. The rule of the best method of invention is interpreted as having meanings and concepts related to the technical scope of the present invention.
[0032] The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. In the specification, with regard to adding reference numerals to components throughout the drawings, it should be noted that like reference numerals design...
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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.
Description
[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2010-0101979, filed Oct. 19, 2010, entitled "Charging Equipment Of Variable Frequency Control For Power Factor," which is hereby incorporated by reference in its entirety. technical field [0003] The invention relates to a charging device for variable frequency control of power factor. Background technique [0004] Generally, when an electric vehicle travels, a battery serving as a main power source in the electric vehicle discharges a charging voltage, so that the battery must be charged after a predetermined time elapses after traveling a predetermined distance. [0005] The method of charging the battery, which is the main power source of electric vehicles, is mainly classified according to the type of system or charging current classification. The system classification method is divided into an on-board type in which a charging device is incl...
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IPC IPC(8): H02J7/10H02M1/42
CPCH02M3/3384Y02B70/16H02M2001/007Y02B70/126H02J7/022H02M2001/0032H02M1/4225H02J7/02H02J2207/20Y02B40/00Y02B70/10H02M1/0032H02M1/007H02J7/04H02M1/08H02M1/0064H02M7/06
Inventor 赵荣真韩奎范
Owner SAMSUNG ELECTRO MECHANICS CO LTD