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BUCK-BUCK-BOOST bridgeless converter

A BUCK-BUCK-BOOST, converter technology, applied in the field of AC/DC converters, can solve the problems of low efficiency, large common mode current, strong electromagnetic interference, etc. The effect of high circuit reliability

Inactive Publication Date: 2013-09-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing bridgeless AC / DC converter has the defects of large common mode current and strong electromagnetic interference, while the efficiency of the two-stage structure converter is low

Method used

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  • BUCK-BUCK-BOOST bridgeless converter
  • BUCK-BUCK-BOOST bridgeless converter
  • BUCK-BUCK-BOOST bridgeless converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Such as figure 1 As shown, a BUCK-BUCK-BOOST bridgeless converter is formed by integrating the BUCK circuit link and the BUCK-BOOST circuit link. In the positive half cycle of the input voltage, the circuit works in BUCK mode, and in the negative half cycle of the input voltage, the circuit works in BUCK-BOOST mode.

[0017] The specific circuit includes: input AC power supply, second switch tube S2, inductor L, first diode D1, first switch tube S1, load, capacitor C and second diode D2, the first switch tube S1 The source is respectively connected to the drain of the second switching tube S2 and one end of the input AC power supply, the drain of the first switching tube S1 is respectively connected to one end of the load, one end of the capacitor C, and one end of the inductance L, and the other end of the inductance L respectively connected to the cathode of the first diode D1 and the source of the second switching tube S2; the anode of the second diode D2 is respect...

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Abstract

The invention discloses a BUCK-BUCK-BOOST bridgeless converter which comprises an input alternating power source, a second switching tube, an inductor, a first diode, a first switching tube, a load, a capacitor and a second diode. The source electrode of the first switching tube is respectively connected with the drain electrode of the second switching tube and one end of the input alternating power source. The drain electrode of the first switching tube is respectively connected with one end of the load, one end of the capacitor and one end of the inductor. The other end of the inductor is respectively connected with the negative electrode of the first diode and the source electrode of the second diode. The positive electrode of the second diode is respectively connected with the other end of the load and the other end of the capacitor. The negative electrode of the second diode is respectively connected with the positive electrode of the first diode and the other end of the input alternating power source. The BUCK-BUCK-BOOST bridgeless converter is simple in structure and high in efficiency, a control circuit is easy to achieve, and the BUCK-BUCK-BOOST bridgeless converter is high in power density, high in circuit reliability and low in cost.

Description

technical field [0001] The invention relates to the field of AC / DC converters, in particular to a BUCK-BUCK-BOOST bridgeless converter. Background technique [0002] At present, the commonly used AC / DC converters mainly include single-stage structure and two-stage structure. The single-stage structure is usually a bridgeless AC / DC converter, and the two-stage structure is generally composed of a diode rectifier circuit and a DC / DC converter. . The existing bridgeless AC / DC converter has the defects of large common-mode current and strong electromagnetic interference, while the efficiency of the two-stage structure converter is low. Contents of the invention [0003] The present invention provides a BUCK-BUCK-BOOST bridgeless converter in order to overcome the shortcomings of the above-mentioned prior art. [0004] The present invention adopts following technical scheme: [0005] A BUCK-BUCK-BOOST bridgeless converter, comprising an input AC power supply, a second switch...

Claims

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Application Information

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IPC IPC(8): H02M7/12H02M3/10
Inventor 张波张能
Owner SOUTH CHINA UNIV OF TECH
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