CN102324836A - Output filtering circuit of high-power low-voltage large-current high-frequency switch power supply device - Google Patents
Output filtering circuit of high-power low-voltage large-current high-frequency switch power supply device Download PDFInfo
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- CN102324836A CN102324836A CN201110273689A CN201110273689A CN102324836A CN 102324836 A CN102324836 A CN 102324836A CN 201110273689 A CN201110273689 A CN 201110273689A CN 201110273689 A CN201110273689 A CN 201110273689A CN 102324836 A CN102324836 A CN 102324836A
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Abstract
The invention provides an output filtering circuit of a high-power low-voltage large-current high-frequency switch power supply device, which comprises an inductance, a capacitor bank, an anode copper bar and a cathode copper bar. The capacitor bank (CZ) consists of N capacitor bars; the capacitor bars have the same structures; each capacitor bar comprises M electrolytic capacitors; N is more than or equal to 1; M is more than or equal to 2; and each electrolytic capacitor is respectively and independently connected to the anode copper bar or the cathode copper bar through a group of lead wires. In the invention, a total current of a capacitance branch in the filtering circuit is shunted by a plurality of electrolytic capacitors so as to greatly reduce ripple waves generated when the current flows parasitic inductances in the electrolytic capacitance branches and achieving a good filtering effect; and compared with a structure that only one large capacitor is used or a plurality of large capacitors are connected in parallel, a structure of using a plurality of capacitor bars has a good heat dissipating effect and small volume. The output filtering circuit is suitable to be used as the output filtering circuit of industrial power supply devices for electrolysis, electroplating and the like or other high-power high-frequency switch power supplies which need a low-voltage large-current output.
Description
Technical field
The present invention relates to the output technical field of filtering of the high-power high-frequency switch power supply of low-voltage and high-current output, be specifically related to a kind of output filter circuit that is applicable to the high-power low-voltage, high-current high frequency switch power device of industrial circles such as electrolysis, plating.
Background technology
The application of high frequency switch power in commercial production more and more widely, for example as the core of electrochemical industry power supplys such as electrolysis, plating equipments, high frequency switch power generally need be exported 6 ~ 30V, the direct current that 1000A is above.And in order to improve processing quality, the ripple of output voltage and electric current is low more good more, even some occasions requires the ripple of voltage and current to be lower than 1%, and this design to the power supply output filter circuit is a great difficult problem.
At present the direct current high frequency switch power extensively adopts single-stage or multistage LC filter circuit in output filtering link, i.e. main circuit crosstalk sense, and several big electric capacity come the filtering high frequency ripple.Because the electric current of power supply output is very big, filter inductance generally passes magnet ring by copper bar and constitutes, and this moment, copper bar was equivalent to the coil of inductance, and the number of turn is generally less than a circle, and this inductance value is very little; Can through and a plurality of magnet rings improve inductance value, but because the space of supply unit is limited, magnet ring that can parallel connection is limited, therefore total inductance value is smaller.Simultaneously; There are stray inductance in line, output lead between filter capacitor, filter capacitor and the output busbar; Relative filter inductance, the value of these stray inductances is considerable, when this makes the big electric current of high-frequency impulse through the LC filter; On the stray inductance of line between filter capacitor and filter capacitor and the output busbar, produce bigger voltage ripple, make that the voltage and current ripple of power supply output is very big.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of output filter circuit that is applicable to the high-power low-voltage, high-current high frequency switch power device of industrial circles such as electrolysis, plating is provided.The principle of filter circuit of the present invention is the electric current that flows through the filter capacitor branch road through a large amount of reductions, with the voltage that reduces to be produced by the stray inductance of filter capacitor branch road, thereby reduces the ripple of electric power output voltage and electric current greatly, and specifically technical scheme is following.
The output filter circuit of high-power low-voltage, high-current high frequency switch power device comprises inductance L, capacitance group C
Z, anodal copper bar and negative pole copper bar; Said capacitance group C
ZRow forms by N piece electric capacity, and every electric capacity row's structure is identical, and every electric capacity row all comprises M electrochemical capacitor, N>=1, M>=2; Each electrochemical capacitor independently is connected to anodal copper bar or negative pole copper bar through one group of lead separately.
In the output filter circuit of above-mentioned high-power low-voltage, high-current high frequency switch power device; Every electric capacity package is drawn together a pcb board, a M electrochemical capacitor, the anodal copper sheet that connects and is connected copper sheet with negative pole; A plurality of electrochemical capacitors are installed on the pcb board; The anodal copper sheet that connects is connected with anodal copper bar; Negative pole connects copper sheet and is connected with the negative pole copper bar, and the cathode output end of each electrochemical capacitor in every block of electric capacity is arranged is directly connected to the anodal copper sheet that connects through one group of lead, and the cathode output end of each electrochemical capacitor is directly connected to negative pole through one group of lead and connects copper sheet; The positive and negative electrode output that connects each electrochemical capacitor is connected copper sheet with positive and negative electrode one group of lead is independently, and said every group of lead combined by an enamelled wire or many enamelled wires; Every group of lead comprises many enamelled wires, and many enamelled wires of every group of lead are insulated from each other in other position except the Local Force Company that connects copper sheet at the plus or minus utmost point output of electrochemical capacitor, the plus or minus utmost point is connected together.
In the output filter circuit of above-mentioned high-power low-voltage, high-current high frequency switch power device; Positive pole in every block of electric capacity row connects copper sheet and is fixed to the anodal copper bar of power output end through screw, and negative pole connects copper sheet is fixed to power output end through screw negative pole copper bar.
In the output filter circuit of above-mentioned high-power low-voltage, high-current high frequency switch power device, every electric capacity row's M electrochemical capacitor evenly is intervally arranged into the capable m row of n, n * m=M, n >=2, m >=1.
In the output filter circuit of above-mentioned high-power low-voltage, high-current high frequency switch power device, inductance (L) passes a plurality of ferrocart core magnet rings by said anodal copper bar and constitutes.
Compared with prior art the present invention has following advantage: the present invention is different from existing single-stage LC filter circuit, and original circuit is the big electric capacity of one or more parallel connections, the capacitance group that the present invention adopts a plurality of little electrochemical capacitors to constitute.Because capacitance group C
ZBy N piece electric capacity row (C
P1) ..., (C
PN) constitute; Every electric capacity row's structure is identical; And every electric capacity row all comprises M electrochemical capacitor, and each electrochemical capacitor is all independently drawn the positive and negative electrode copper bar that lead is connected to power output end, makes capacitance group have the individual independently electrochemical capacitor of N * M and directly is connected with the positive and negative electrode copper bar.The total current of capacitive branch in the individual independently electrochemical capacitor shunting of this N * M filter circuit; The electric current that each electrochemical capacitor is born is very little; Thereby reduce greatly because the ripple that electric current produces when flowing through the stray inductance in the electrochemical capacitor branch road reaches filter effect preferably.And in output filter circuit of the present invention, the structure of using two above electric capacity rows is than the good heat dissipation effect of only using one or more big electric capacity.The present invention is especially suitable for use as industrial power devices such as electrolysis, plating, perhaps the output filter circuit of the high-power high-frequency switch power supply of other low-voltage, high-current output.
Description of drawings
Fig. 1 is the structured flowchart of existing single-stage LC output filter circuit.
Fig. 2 is the structured flowchart of the output filter circuit of high-power low-voltage, high-current high frequency switch power device in the specific embodiment of the invention.
Fig. 3 is the electric capacity row structure chart of the output filter circuit of high-power low-voltage, high-current high frequency switch power device in the specific embodiment of the invention.
Fig. 4 is the output voltage waveforms of output voltage ripple, capacitive branch total current waveform and the output rectifier bridge of the output filter circuit of the high-power low-voltage, high-current high frequency switch power of the present invention shown in Figure 2 device.
Fig. 5 is the output voltage waveforms of output voltage ripple, capacitive branch total current waveform and the output rectifier bridge of existing output filter circuit shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing practical implementation of the present invention is further described, but enforcement of the present invention is not limited thereto.
Referring to figs. 2 and 3, the output filter circuit of high-power low-voltage, high-current high frequency switch power device of the present invention is by filter inductance L202 and capacitance group C
ZConstitute.Inductance L 202 is passed a plurality of ferrocart core magnet rings by anodal copper bar 203 and is constituted.Capacitance group C
ZBy N piece electric capacity row 201 (C
P1) ..., (C
PN) form, every electric capacity row's 201 structure is identical, by a pcb board 303, a M electrochemical capacitor 301, anodally connect copper sheet 304, negative pole connects copper sheet 305, and connects electrochemical capacitor is connected copper sheet with positive and negative electrode lead group 302 formations.The cathode output end of each electrochemical capacitor 301 that every block of electric capacity row is 201 li is directly connected to the anodal copper sheet 304 that connects through one group of lead 302, and the cathode output end of each electrochemical capacitor 301 is directly connected to negative pole through one group of lead 302 and connects copper sheet 305; The positive and negative electrode output that connects each electrochemical capacitor 301 is independently with the anodal one group of lead 302 that is connected copper sheet 304, negative pole connection copper sheet 305, and every group of lead 302 can be combined by an enamelled wire or many enamelled wires; Many enamelled wires of every group of lead 302 are insulated from each other except the plus or minus utmost point output of electrochemical capacitor 301, the anodal Local Force Company that connects copper sheet 304 or negative pole connection copper sheet 305 are connected together in other position.The positive pole that every block of electric capacity row is 201 li connects copper sheet 304 and is fixed to the anodal copper bar 203 of power output end through screw, and negative pole connects copper sheet 305 is fixed to power output end through screw negative pole copper bar 204.Every electric capacity row 201 comprises M electrochemical capacitor 301, capacitance group (C
Z) total (N * M) individual independently electrochemical capacitor 301 is connected with anodal copper bar 203, the negative pole copper bar 204 of power output end.Every electric capacity row's 201 M electrochemical capacitor 301 evenly is intervally arranged into the capable m row of n, M=n * m.
In the filter circuit according to the invention, establish connection electrochemical capacitor 301 and form by r bar enamelled wire, then for the capacitance group (C that comprises M independent electrochemical capacitor 301 with the anodal lead group 302 that is connected copper sheet 304, negative pole connection copper sheet 305
Z) total total (the bar separate conductors of N * M * r) is if the stray inductance of every lead is L
C, establishing the pulse current amplitude that flows through capacitance group is △ I, the voltage magnitude that then on the lead group, produces does
Wherein △ t is the rising and the fall time of pulse current.Can know that by following formula when r was big more, the voltage magnitude that on lead group 302, produces was more little, so output voltage and current ripples are also more little.
Fig. 4 is the simulation waveform of output filter circuit of the present invention, and capacitance group is made up of three identical electric capacity rows in the artificial circuit, and every electric capacity row has 18 electrochemical capacitors; Each electrochemical capacitor amount is 1mF, and the capacitance group total capacitance is 54mF, and the stray inductance of capacitive branch is 160nH; Filter inductance is 800nH, and the output rectifier output amplitude of power supply is 24V, and frequency is the potential pulse of 17KHz; The stray inductance of output lead is 400nH, and load is 7m Ω.
Fig. 5 is the simulation waveform of existing output filter circuit shown in Figure 1, adopts two big electrochemical capacitors parallel connections in the artificial circuit, and each electrochemical capacitor amount is 35mF; The capacitance group total capacitance is 60mF, and the stray inductance of capacitive branch is 160nH, and filter inductance is 800nH; The output rectifier output amplitude of power supply is 24V; Frequency is the potential pulse of 17KHz, and the stray inductance of output lead is 400nH, and load is 7m Ω.
Comparison diagram 4 can know that with Fig. 5 the capacitance of output filter circuit of the present invention is littler than the capacitance that Fig. 1 circuit uses, but output voltage ripple is approximately 0.086V, is about 1/22 times of Fig. 1 circuit voltage ripple.But the filter effect by the output filter circuit of simulation analysis knowledge capital invention is very good.
Output filter circuit of the present invention is through the electric current of a plurality of independently little electrochemical capacitor shunting capacitance branch roads; Thereby the voltage ripple that the stray inductance that reduces capacitive branch greatly produces makes that the high frequency ripple of low-voltage, high-current DC power supply output is reduced greatly.The invention solves filter capacitor and the lead-in wire stray inductance causes the excessive problem of output voltage ripple, make the output ripple of low-voltage, high-current high-power high-frequency switch power supply satisfy 1% requirement.And in output filter circuit of the present invention, use a plurality of electric capacity rows' structure littler than the good heat dissipation effect, the volume that only use a big electric capacity or a plurality of big electric capacity parallel connections.The present invention is especially suitable for use as industrial power devices such as electrolysis, plating, and perhaps other needs the output filter circuit of the high-power high-frequency switch power supply of low-voltage, high-current output.
Claims (6)
1. the output filter circuit of high-power low-voltage, high-current high frequency switch power device comprises inductance (L), capacitance group (C
Z), anodal copper bar and negative pole copper bar; It is characterized in that: said capacitance group (C
Z) form by N piece electric capacity row, every electric capacity row's structure is identical, and every electric capacity row all comprises M electrochemical capacitor, N>=1, M>=2; Each electrochemical capacitor independently is connected to anodal copper bar or negative pole copper bar through one group of lead separately.
2. the output filter circuit of high-power low-voltage, high-current high frequency switch power device according to claim 1; It is characterized in that a pcb board, a M electrochemical capacitor are drawn together in every electric capacity package, the anodal copper sheet that connects is connected copper sheet with negative pole; A plurality of electrochemical capacitors are installed on the pcb board; The anodal copper sheet that connects is connected with anodal copper bar; Negative pole connects copper sheet and is connected with the negative pole copper bar, and the cathode output end of each electrochemical capacitor in every block of electric capacity is arranged is directly connected to the anodal copper sheet that connects through one group of lead, and the cathode output end of each electrochemical capacitor is directly connected to negative pole through one group of lead and connects copper sheet; The positive and negative electrode output that connects each electrochemical capacitor is connected copper sheet with positive and negative electrode one group of lead is independently, and said every group of lead combined by an enamelled wire or many enamelled wires; Every group of lead comprises many enamelled wires, and many enamelled wires of every group of lead are insulated from each other in other position except the Local Force Company that connects copper sheet at the plus or minus utmost point output of electrochemical capacitor, the plus or minus utmost point is connected together.
3. the output filter circuit of high-power low-voltage, high-current high frequency switch power device according to claim 2; It is characterized in that: the positive pole in every block of electric capacity row connects copper sheet and is fixed to the anodal copper bar of power output end through screw, and negative pole connects copper sheet is fixed to power output end through screw negative pole copper bar.
4. the output filter circuit of high-power low-voltage, high-current high frequency switch power device according to claim 3 is characterized in that: every electric capacity row's M electrochemical capacitor evenly is intervally arranged into the capable m row of n, n * m=M, n >=2, m >=1.
5. according to the output filter circuit of each described high-power low-voltage, high-current high frequency switch power device of claim 1～4, it is characterized in that: inductance (L) passes a plurality of ferrocart core magnet rings by said anodal copper bar and constitutes.
6. according to the output filter circuit of each described high-power low-voltage, high-current high frequency switch power device of claim 1～4, it is characterized in that: N >=2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110273689.1A CN102324836B (en) | 2011-09-16 | 2011-09-16 | Output filtering circuit of high-power low-voltage large-current high-frequency switch power supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110273689.1A CN102324836B (en) | 2011-09-16 | 2011-09-16 | Output filtering circuit of high-power low-voltage large-current high-frequency switch power supply device |
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| Publication Number | Publication Date |
|---|---|
| CN102324836A true CN102324836A (en) | 2012-01-18 |
| CN102324836B CN102324836B (en) | 2014-05-07 |
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| CN201110273689.1A Expired - Fee Related CN102324836B (en) | 2011-09-16 | 2011-09-16 | Output filtering circuit of high-power low-voltage large-current high-frequency switch power supply device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887957A (en) * | 2014-03-04 | 2014-06-25 | 东莞市常晋凹版模具有限公司 | Device capable of reducing high-frequency rectification power supply ripple factors |
| CN103986317A (en) * | 2014-05-29 | 2014-08-13 | 深圳市英可瑞科技开发有限公司 | Filter circuit with power frequency output |
| CN106230290A (en) * | 2016-09-29 | 2016-12-14 | 湖北三江航天万峰科技发展有限公司 | A kind of switching noise restraining device of high-power boosted switch power supply |
| CN107819396A (en) * | 2016-09-14 | 2018-03-20 | 方惠娥 | A kind of comprehensive forceful electric power isolation and electric source filter circuit |
| CN112701878A (en) * | 2020-12-08 | 2021-04-23 | 日立电梯（中国）有限公司 | Bus capacitor structure and elevator frequency converter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200969285Y (en) * | 2006-08-25 | 2007-10-31 | 华为技术有限公司 | Parallel capacitors and its printed circuit boards |
| CN101202399A (en) * | 2007-11-09 | 2008-06-18 | 上海新时达电气有限公司 | Fixed connection structure of frequency changer direct current bus |
| CN201303286Y (en) * | 2008-06-04 | 2009-09-02 | 张涛 | DC bus structure of frequency converter main circuit |
| CN101692580A (en) * | 2009-09-29 | 2010-04-07 | 杭州浙大太阳电气有限公司 | Novel energy feedback device adopting high frequency switch mode |
| CN202218155U (en) * | 2011-09-16 | 2012-05-09 | 华南理工大学 | Output filter circuit for high-power low-voltage large-current high-frequency switch power supply device |
-
2011
- 2011-09-16 CN CN201110273689.1A patent/CN102324836B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200969285Y (en) * | 2006-08-25 | 2007-10-31 | 华为技术有限公司 | Parallel capacitors and its printed circuit boards |
| CN101202399A (en) * | 2007-11-09 | 2008-06-18 | 上海新时达电气有限公司 | Fixed connection structure of frequency changer direct current bus |
| CN201303286Y (en) * | 2008-06-04 | 2009-09-02 | 张涛 | DC bus structure of frequency converter main circuit |
| CN101692580A (en) * | 2009-09-29 | 2010-04-07 | 杭州浙大太阳电气有限公司 | Novel energy feedback device adopting high frequency switch mode |
| CN202218155U (en) * | 2011-09-16 | 2012-05-09 | 华南理工大学 | Output filter circuit for high-power low-voltage large-current high-frequency switch power supply device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887957A (en) * | 2014-03-04 | 2014-06-25 | 东莞市常晋凹版模具有限公司 | Device capable of reducing high-frequency rectification power supply ripple factors |
| CN103887957B (en) * | 2014-03-04 | 2016-03-02 | 东莞市脉拓表面处理科技有限公司 | A kind of device that can reduce high-frequency rectification power-supply ripple coefficient |
| CN103986317A (en) * | 2014-05-29 | 2014-08-13 | 深圳市英可瑞科技开发有限公司 | Filter circuit with power frequency output |
| CN107819396A (en) * | 2016-09-14 | 2018-03-20 | 方惠娥 | A kind of comprehensive forceful electric power isolation and electric source filter circuit |
| CN106230290A (en) * | 2016-09-29 | 2016-12-14 | 湖北三江航天万峰科技发展有限公司 | A kind of switching noise restraining device of high-power boosted switch power supply |
| CN112701878A (en) * | 2020-12-08 | 2021-04-23 | 日立电梯（中国）有限公司 | Bus capacitor structure and elevator frequency converter |
| CN112701878B (en) * | 2020-12-08 | 2022-07-08 | 日立电梯（中国）有限公司 | Bus capacitor structure and elevator frequency converter |
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| CN102324836B (en) | 2014-05-07 |
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Granted publication date: 20140507 Termination date: 20200916 |