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Six-path staggered parallel Boost printed flexible circuit (PFC)

A circuit and parallel technology, applied in the direction of electrical components, adjusting electrical variables, high-efficiency power electronic conversion, etc., can solve problems such as large Boost inductance, large current and voltage withstand of switching devices, and low output power

Active Publication Date: 2018-11-06
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a 6-way interleaved parallel Boost PFC circuit, which is used to overcome the traditional power factor correction circuit Boost inductance, small output power, large current and voltage of the switching device of the circuit, and current ripple. Disadvantages such as Boda

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  • Six-path staggered parallel Boost printed flexible circuit (PFC)
  • Six-path staggered parallel Boost printed flexible circuit (PFC)
  • Six-path staggered parallel Boost printed flexible circuit (PFC)

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Embodiment Construction

[0029] The technical solution provided by the present invention will be further described below in conjunction with the accompanying drawings.

[0030] In the prior art, increasing the use power of the PFC generally starts from the following aspects. One is the application of new power devices; the other is the improvement of the circuit structure; the third is the use of multi-level circuits in interleaved parallel connection; the fourth is the study of control schemes. Nowadays, two-stage interleaved power factor correction in parallel can handle most applications, and its use power can reach 5KW or even higher. For example, the UCC28070 chip produced by TI provides a two-level interleaved circuit design. However, how to implement multi-level interleaving using the existing two-level interleaving chip has become an urgent problem to be solved in the prior art.

[0031] The technical idea of ​​the present invention is to use synchronous clock signals to combine multiple PFC chips...

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Abstract

The invention discloses a six-path staggered parallel Boost printed flexible circuit (PFC). The six-path staggered parallel Boost PFC comprises a Boost circuit, a multi-path flyback circuit, a surge-prevention circuit, a UCC28070 module, a rectification circuit and an electromagnetic interference (EMI) circuit, wherein an input end of the EMI circuit is connected with a mains supply, an output endof the EMI circuit is connected with an input end of the surge-prevention circuit, an input end of the rectification circuit is connected with an output end of the surge-prevention circuit, an outputof the rectification circuit is connected with the Boost circuit, a control end of the Boost circuit is connected with the UCC28070, the Boost circuit outputs a 400V DC voltage, an input end of the multi-path flyback circuit is connected with a DC400V output end output from the Boost, and the DC400V output end is used for supplying power to the surge-prevention circuit, the Boost circuit and theUCC28070 module. The Boost PFC is small in current ripple, and the stress of a switch device and the boost inductance size are reduced.

Description

Technical field [0001] The invention belongs to the technical field of charging power supplies, and relates to a power factor correction of a large-scale high-power battery charging system, and in particular to a power factor correction that can use 220V / 50Hz AC power conversion and output 400V DC power for the subsequent DC-DC module Voltage and improve the conversion efficiency of the charger, reduce the pollution to the grid. Background technique [0002] With the widespread use of power electronic devices, some devices themselves work in a non-linear state, which will generate a large number of harmonics. When these harmonic currents enter the power system, they will pollute the power grid. In order to comply with the harmonic current limit of the IEC61000-4-2 standard proposed by the International Electrotechnical Commission (IEC), in the application of switching power supplies, try to improve its power factor and reduce harmonic pollution on the power grid. In recent years...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M1/44H02M1/32H02M1/14H02M3/158
CPCH02M1/14H02M1/32H02M1/4233H02M1/44H02M3/1584H02M1/325Y02B70/10
Inventor 秦会斌华咏竹吴建锋杨胜英秦宏帅
Owner HANGZHOU DIANZI UNIV
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