Three-level rectifying charger with single-phase T-shaped interleaved parallel structure

A three-level rectification and charger technology, applied in current collectors, battery circuit devices, high-efficiency power electronic conversion, etc., can solve the problems of high voltage stress and large input current harmonics, and achieve small voltage stress, input current ripple The effect of small wave and high power density

Active Publication Date: 2021-08-03
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional two-level converters have been used in industry for decades, but they are being replaced by emerging multi-level rectified charger technologies due to their disadvantages such as high voltage stress and large input current harmonics

Method used

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  • Three-level rectifying charger with single-phase T-shaped interleaved parallel structure
  • Three-level rectifying charger with single-phase T-shaped interleaved parallel structure
  • Three-level rectifying charger with single-phase T-shaped interleaved parallel structure

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Embodiment Construction

[0041] Such as figure 1 As shown, the three-level rectifier charger with single-phase T-type interleaved parallel structure, the left side of the rectifier charger is a diode bridge arm D 1 、D2 . The right side of the rectifier charger is an interleaved parallel T-shaped bridge arm structure S a1 , S a2 , S a3 , S a4 (S b1 , S b2 , S b3 , S b4 ) A three-level structure composed of parallel connections.

[0042] The rectifier charger of the present invention includes a switch tube S a1 , S a2 , S a3 , S a4 , S b1 , S b2 , S b3 , S b4 , Diode D 1 、D 2 , AC power u g , inductance L 1 , L 2 , capacitance C 1 、C 2 .

[0043] In the three-level rectification charger circuit with T-shaped interleaved parallel structure, the AC power supply u g Connect the parallel inductor L to the right 1 , L 2 ; Inductance L 1 connected to a T-shaped switch structure S a1 source, S a2 Drain, S a3 On the source, the intersection point is a;

[0044] Inductance L 2 Co...

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Abstract

The invention relates to a three-level rectification charger with a single-phase T-shaped interleaving parallel structure. The rectification charger comprises switching tubes Sa1, Sa2, Sa3, Sa4, Sb1, Sb2, Sb3 and Sb4, diodes D1 and D2, inductors L1 and L2, and capacitors C1 and C2. The rectification charger comprises staggered parallel T-shaped bridge arm structures Sa1, Sa2, Sa3 and Sa4 and a three-level structure formed by connecting Sb1, Sb2, Sb3 and Sb4 in parallel. The three-level rectifying charger with the single-phase T-shaped interleaved parallel structure has the interleaved parallel T-shaped bridge arm structure and the three-level structure, and the circuit has the advantages of high reliability, small alternating current harmonic wave, low voltage stress of the switching tube and the like.

Description

technical field [0001] The invention relates to the technical field of multilevel rectifiers, in particular to a three-level rectifier charger with a single-phase T-shaped interleaved parallel structure. Background technique [0002] Power factor correction converter equipment is widely used in industry, mainly need to achieve unity power factor and low harmonic distortion of AC waveform. In the inverter circuit, the multi-level technology has been relatively mature research, and the multi-level technology is being gradually studied in the rectifier charger. [0003] Traditional two-level converters have been used in industry for decades, but they are being replaced by emerging multi-level rectified charger technologies due to their disadvantages such as high voltage stress and large input current harmonics. Multilevel converters generate more voltage levels while operating at a lower switching frequency, which greatly reduces voltage and current harmonics. In addition, mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M7/219H02M7/23H02M7/25H02M7/04H02M1/42H02J7/02
CPCH02M7/217H02M7/219H02M7/23H02M7/25H02M7/04H02M1/42H02M1/4233H02M1/4225H02J7/02H02J2207/20Y02B70/10
Inventor 马辉敬成徐甜川刘昊邦
Owner CHINA THREE GORGES UNIV
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