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AC (alternating-current) and DC (direct-current) conversion circuit

A technology of AC-DC conversion and AC power, applied in the direction of converting AC power input to DC power output, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of high cost and low power factor of the circuit

Active Publication Date: 2013-01-02
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an AC-DC conversion circuit that uses a small capacitance for the disadvantages of high cost and low power factor of the entire circuit due to the use of large electrolytic capacitors for AC-DC conversion. The electrolytic capacitor is designed to replace the large electrolytic capacitor, the AC-DC conversion circuit with low cost and improved power factor

Method used

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  • AC (alternating-current) and DC (direct-current) conversion circuit
  • AC (alternating-current) and DC (direct-current) conversion circuit
  • AC (alternating-current) and DC (direct-current) conversion circuit

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] exist figure 1 In the schematic diagram of the circuit structure of the preferred embodiment of the AC-DC conversion circuit shown in the present invention, the AC-DC conversion circuit includes a rectifier circuit 1 and a filter circuit 2, the rectifier circuit 1 is used to rectify the input AC, and the filter circuit 2 Used to filter the rectified alternating current, the filter circuit 2 includes a diode D3, a diode D4, a diode D8, a diode D9, a capacitor C7 and a capacitor C9, the anode of the diode D3 is connected to the rectifier circuit 1 The output connection of the diode D3, the ca...

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PUM

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Abstract

The invention relates to an AC (alternating-current) and DC (direct-current) conversion circuit which comprises a rectification circuit and a filter circuit, wherein the filter circuit comprises a diode D3, a diode D4, a diode D8, a diode D9, a capacitor C7 and a capacitor C9; the anode of the diode D3 is connected with a rectification circuit; the cathode of the diode D3 is connected with the cathode of the diode D9; one end of a capacitor C7 is connected with the cathode of the diode D3; the other end of the capacitor C7 is connected with the anode of the diode D8 and the cathode of the diode D4 respectively; the cathode of the diode D8 is connected with the anode of the diode D9; one end of the capacitor C9 is connected with the anode of the diode D4; the other end of the capacitor C9 is connected with the anode of the diode D9; and the cathode of the diode D9 is also connected with the DC output end. According to the invention, a small-capacity capacitor is used for replacing the high-capacity capacitor, the cost is low, and the power factor can be improved, and the defects that the existing AC and DC conversion circuit is high in cost, and is low in circuit power factors because the high-capacity capacitor is utilized are avoided.

Description

technical field [0001] The present invention relates to the field of circuit design, more specifically, relates to an AC-DC conversion circuit realized by using an electrolytic capacitor with a small capacitance value. Background technique [0002] Generally, simple AC-DC conversion circuits use a rectifier bridge circuit, and then through large electrolytic capacitor chopping and capacitor filtering, the AC can be converted into DC to supply power to the load. When the above-mentioned method is used for AC-DC conversion, a relatively large electrolytic capacitor is required, and the cost is high, and the power factor of the whole circuit is low at the same time. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an AC-DC conversion circuit that uses a small capacitance for the disadvantages of high cost and low power factor of the entire circuit due to the use of large electrolytic capacitors for AC-DC conversion. ...

Claims

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Application Information

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IPC IPC(8): H02M7/162H02M1/42
CPCY02B70/126Y02B70/10
Inventor 周明杰屈煜
Owner OCEANS KING LIGHTING SCI&TECH CO LTD