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Multi-pulse rectifier

A multi-pulse rectification and multi-pulse technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., can solve problems such as low efficiency and low harmonics

Pending Publication Date: 2018-05-04
ECU ELECTRONICS INDAL
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  • Claims
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Problems solved by technology

[0003] The present invention aims at the low efficiency of current low-voltage and high-current output multi-pulse rectifiers, adopts low-voltage high-current output multi-pulse rectifiers based on synchronous rectification technology, and provides high-efficiency and low-harmonic technical means for low-voltage high-current output multi-pulse rectifiers

Method used

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Embodiment

[0021] figure 1 The connection schematic diagram of the multi-pulse rectifier provided for the present invention includes: the input power supply of the rectifier adopts AC three-phase input, the output end of the input surge suppression circuit 1 is connected with the input end of the multi-pulse transformer 2, and the output end of the multi-pulse transformer is connected with the output rectifier The input terminal of the circuit 3 is connected, the output of the FPGA control circuit 5 is connected with the output rectification circuit, and the auxiliary power supply 4 is respectively connected with the input surge suppression circuit, the output rectification circuit, and the FPGA control circuit to provide control power.

[0022] Such as figure 1 As shown, the AC three-phase input adopts three-phase three-wire system or three-phase four-wire system 115Vac / 400Hz; figure 2 As shown, the multi-pulse transformer 2 adopts an input / output isolated 18-pulse transformer; the ou...

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Abstract

The invention provides a multi-pulse rectifier. According to the multi-pulse rectifier, an input end of an input surge suppression circuit receives the input of an AC three-phase electricity, and theoutput end of the input surge suppression circuit is connected with the input end of an output rectifier circuit. The output of an FPGA control circuit is connected with the output rectifier circuit.An auxiliary power supply is respectively connected with the input surge suppression circuit, a multi-pulse transformer and the output rectifier circuit so as to supply a control power supply to the input surge suppression circuit, the multi-pulse transformer and the output rectifier circuit. By adopting the multi-pulse rectifier, the input / output isolation is realized by means of a 18-pulse isolation transformer as a multi-pulse transformer. Meanwhile, by adopting the 18-pulse isolation transformer, current harmonics on the power grid side can be greatly reduced. The multi-pulse rectifier ishigh in power factor, and small in output voltage ripples. Meanwhile, the on / off state of a switching tube of the output rectifier circuit can be accurately controlled through the PFGA usage software.The conduction loss of a rectifier tube is reduced, and the efficiency of a rectifier is improved. The weight and the size of a radiator are reduced.

Description

technical field [0001] The invention relates to a gas detection device, in particular to the technical field of signal amplification of a gas sensor, in particular to a multi-pulse rectifier. Background technique [0002] At present, the research and application of multi-pulse rectification technology at home and abroad are mainly concentrated in high-voltage output occasions, such as converting 115Vac to 270V DC, or converting 380Vac to 540V DC output. Due to the high output voltage, the transformer mostly adopts an auto-coupling form, and the rectifier efficiency is high, which can generally reach 97% at full load. For low-voltage and high-current applications, such as 28V output transformer rectifiers in aviation, electrolysis, electroplating and other applications, the existing multi-pulse rectifiers or need to add balance reactors make the system more magnetic parts, complicated circulation control, and light load. The output voltage of non-parallel power supply is too...

Claims

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Application Information

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IPC IPC(8): H02M7/217
CPCH02M7/217
Inventor 陈乾宏李善庆汪邦照
Owner ECU ELECTRONICS INDAL
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