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Output filter circuit suitable for large current output electrochemical industrial power supply

An output filtering and electrochemical technology, which is applied in the field of output filtering, can solve the problems of obvious negative influence, increase of parasitic inductance voltage fluctuation, difficulty in obtaining filtering effect, etc., and achieve the effect of eliminating parasitic and realizing zero ripple output

Inactive Publication Date: 2011-08-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the case of high current output, the voltage fluctuation on the parasitic inductance is greatly increased, and its negative impact becomes more and more obvious
At this time, it is difficult to obtain an ideal filtering effect by using the LC filter circuit alone.

Method used

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  • Output filter circuit suitable for large current output electrochemical industrial power supply
  • Output filter circuit suitable for large current output electrochemical industrial power supply
  • Output filter circuit suitable for large current output electrochemical industrial power supply

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Embodiment Construction

[0015] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation and protection scope of the present invention are not limited thereto.

[0016] Such as figure 2 As shown, an output filter circuit suitable for large-current output electrochemical industrial power supplies in this embodiment includes a first inductor L 1 , the second inductance L 2 , the third inductance L 3 , the fourth inductance L 4 , the first capacitance C 1 and a second capacitor C 2 ; An output end of the rectification output module of the power supply and the first inductance L 1 One end of the fourth inductance L 4 One end of the inductance is connected; the first inductance L 1 The other end of the third inductor L 3 One end of the load and one end of the load are connected; the fourth inductance L 4 The other end of the second capacitor C 2 One end of the connection, the second cap...

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Abstract

The invention provides an output filter circuit suitable for a large current output electrochemical industrial power supply. One output end of a rectification output module of the power supply is connected with one end of a first inductor and one end of a fourth inductor; the other end of the first inductor is connected with one end of a third inductor and one end of a load; the other end of the fourth inductor is connected with one end of a second capacitor; the other end of the second capacitor is connected with the other end of the load and one end of a second inductor; the other end of the third inductor is connected with one end of a first capacitor; and the other end of the first capacitor and the other end of the second inductor are together connected to the other output end of therectification output module of the power supply. In the invention, the problem of excessively large ripples, which is caused by a filter capacitor and a lead parasitic inductor thereof, of an output voltage in the large current output places is solved, so that a direct current (DC) output high-frequency switch power supply can realize zero-ripple output. Therefore, the output filter circuit is very suitable for the DC large current output power supply in the electrochemical industries of electrolysis, electroplating and the like.

Description

technical field [0001] The invention relates to the technical field of output filtering of a high-frequency switching power supply whose output is direct current, in particular to an output filtering circuit suitable for large-current output electrochemical industrial power supplies. Background technique [0002] At present, the high-frequency switching power supply whose output is DC generally uses a single-stage LC filter circuit in the output filter link, that is, the main circuit series inductors and parallel capacitors to filter out high-frequency ripples (such as figure 1 ). When the output current is small, the voltage fluctuation on the equivalent series inductance of the filter capacitor itself and the capacitor lead inductance (hereinafter referred to as parasitic inductance) is relatively small, so the influence of the parasitic inductance is not obvious, and a single-stage LC filter circuit can be used. Get a satisfactory filtering effect. However, in the case ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14
Inventor 张波段振涛张桂东肖文勋何文志戴钰林仕立丘东元
Owner SOUTH CHINA UNIV OF TECH
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