CN203632568U - Switch power supply circuit based on twenty pulse wave rectification and multi-tube phase dislocation chopping - Google Patents
Switch power supply circuit based on twenty pulse wave rectification and multi-tube phase dislocation chopping Download PDFInfo
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- CN203632568U CN203632568U CN201320835940.3U CN201320835940U CN203632568U CN 203632568 U CN203632568 U CN 203632568U CN 201320835940 U CN201320835940 U CN 201320835940U CN 203632568 U CN203632568 U CN 203632568U
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Abstract
The utility model discloses a switch power supply circuit which can be used for high-power and ultra-high-stability twenty-four pulse wave rectification and multi-tube phase dislocation chopping. The switch power supply circuit comprises an input rectification filter circuit used for inputting voltage rectification filtering, a digital current stabilization circuit positioned between the rectification circuit and an output, an output filter circuit positioned between the digital current stabilization circuit and the output, and a control unit used for controlling the frequency of a switch power supply and providing a PWM signal. The rectification filter circuit employs three-phase twenty-four pulse wave rectification and two-stage LC filtering so that low frequency voltage ripple can be effectively reduced; the current stabilization circuit employs digital multi-tube phase dislocation parallel chopping topology so that the chopping frequency is increased and high frequency ripple is fully inhibited; a control loop employs digital control so that the ultra-high-stability current reference is provided; the technical solution of the switch power supply circuit is applicable to switch power supplies with high power and ultra-high stability (the current long-term stability is higher than 1*10<-5>), and the switch power supply circuit is advantaged by high efficiency, high stability, configurable systematic height and the like.
Description
Technical field
The utility model relates to a kind of power circuit, is specifically related to a kind of switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase.
Background technology
Traditional switching power circuit mainly comprises main circuit, control circuit, auxiliary circuit etc., wherein main circuit comprises input rectifying filter circuit, inverter circuit etc., follow the development of power electronics and power supply correlation technique, technical requirement to Switching Power Supply is more and more higher, and high-power, large electric current, low ripple, (current stability, is better than 1X10 to ultra-high stable degree
-5) Switching Power Supply application more and more extensive.The technical indicator of, ultra-high stable degree high-power for realizing, need be well-designed to main circuit, control circuit etc.And there is defect realizing aspect low ripple, ultra-high stable degree in traditional switching power circuit.
Radio-frequency apparatus often exists to be needed dynamically to connect, meet again the position of radio frequency good electrical switching performance simultaneously, generally adopt elastic spring contact at these positions, elastic spring can make up the gap of motion and other accumulated error, can meet again radio frequency electrical switching performance simultaneously.In this case, between reed and with it adjacent workpiece, need to weld the radio frequency electrical switching performance that guarantee is good, general solder (welding temperature is low) weld seam cannot meet the requirement of radio frequency electrical switching performance, if adopt money base soldering or melting, reed need be heated to more than 700 DEG C, can make like this reed follow the string, can not use.Adopt riveted joint or other mechanical connection manner that reed is fixed, cannot meet the requirement of the long-time reliable and stable work of radio system.
Summary of the invention
The purpose of this utility model is for the defect existing in prior art, provide a kind of high-power, (current stability, is better than 1X10 to ultra-high stable degree
-5) the switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase.
The technical solution of the utility model is as follows: a kind of switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase, comprising:
Input rectifying filter circuit, for input three-phase alternating current is rectified into direct current in 24 pulse wave rectifier modes, and filters out low-frequency noise, and described input rectifying filter circuit is connected with digitlization current stabilization circuit input;
Digitlization current stabilization circuit, for by the direct current process multitube misphase copped wave after rectification, forms the direct current of outputting current steadily; Digitlization current stabilization circuit adopts four IGBT parallel connections, forms multitube stagger parallel connection copped wave topology, and its input is connected with the output of input rectifying filter circuit, and the gate pole of IGBT is connected with the pwm signal output of control circuit;
Output filter circuit, between digitlization current stabilization circuit and output, curbs for the galvanic high-frequency noise that digitlization current stabilization circuit is produced;
Control circuit, for generation of pwm signal, controls chopping frequency, and its input exchanges inlet wire with the input of input rectifying filter circuit and joins, and its output is connected with the gate pole of the IGBT of digitlization current stabilization circuit.
Further, switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase as above, wherein, described input rectifying filter circuit comprises 24 pulse wave rectifier transformer and input filter circuits, 24 described pulse wave rectifier transformers are composed in series at output by two groups of transformers, every group of transformer comprises respectively first siding ring, and two second siding rings; Respectively the second siding ring output of two groups of transformers is connect to three-phase bridge rectifier circuit, Bing Jiang tetra-tunnel output series connection, are about to input three-phase alternating current and are rectified into direct current; 24 outputs of pulse wave rectifier transformer and the input of input filter circuit are connected, and input filter circuit is made up of two-stage LC filter circuit.
Further, switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase as above, wherein, in described digitlization current stabilization circuit, the collector electrode of four IGBT of multitube stagger parallel connection copped wave is connected in parallel, the output of each road copped wave circuit links together, form four tunnel copped wave circuit parallel connections, the first electric capacity and the second Capacitance parallel connection are connected to digitlization current stabilization circuit input; The first end of the first inductance is connected with the positive output end of parallel connection chopping circuit, the first end of the second inductance is connected with the negative output terminal of parallel connection chopping circuit, between the second end of the first inductance and the second end of the second inductance, be connected the 3rd electric capacity, the second end of the first inductance is connected with the first end of the 4th electric capacity, the second end ground connection of the 4th electric capacity; The second end of the second inductance is connected with the second end of the 5th electric capacity, the first end ground connection of the 5th electric capacity.
Further, switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase as above, wherein, described control circuit adopts full-digital control, comprise power-supply controller of electric and data acquisition unit, obtain feedback signal at output by DC current sensor, produce and provide the reference signal of ultra-high stable degree.
The beneficial effects of the utility model are as follows: switching power circuit provided by the utility model adopts input 24 pulse wave rectifiers and two-stage LC filtering, input filter circuit adopts electrochemical capacitor, high frequency capacitance and rectifying and wave-filtering reactor composition LC filter circuit, it is 0.01% that 24 pulse waves are not controlled rectification ripple factor, harmonic wave low-limit frequency is 1200Hz, input filter circuit adopts the LC filter of input filter tances on the line, is 2 × 10 by making ripple factor after filter
-4.Switching power circuit adopts multitube misphase ripple scheme, selects 4 IGBT to make stagger parallel connection circuit, every IGBT switching frequency 15KHz～20KHz, and rear output frequency in parallel can reach 60KHz～80KHz, has so not only met ripple index, has more improved reliability.
Brief description of the drawings
Fig. 1 is a kind of switching power circuit theory diagram based on 20 pulse wave rectifiers and the copped wave of multitube misphase of the utility model;
Fig. 2 is input rectifying filter circuit figure in embodiment;
Fig. 3 is digitlization current stabilization and output filter circuit figure in embodiment;
Description of reference numerals: QF-circuit breaker; KM, KM1-contactor; EMI-Electromagnetic interference filter; DCCT-DC current sensor; T1, T2-transformer; C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C13, C14, C15, C16, C17, C18, C19, C20-electric capacity; L1-1, L1-2, L2-1, L2-2, L3-1, L3-2, L5-1, L5-2-inductance; R4-resistance; SK1, SK2, SK3, SK4-IGBT; VD1-diode.
Fig. 4 is control circuit figure in embodiment;
Description of reference numerals: DBB1 is power board, and DBB2 is data acquisition board, DBB3 baffle.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
Switch power supply line structure based on 20 pulse wave rectifiers and the copped wave of multitube misphase provided by the utility model as shown in Figure 1, comprising:
(1) input rectifying filter circuit ZL, it is for input three-phase alternating current is rectified into direct current in 24 pulse wave rectifier modes, and low-frequency noise is filtered out, and described current rectifying and wave filtering circuit is connected with digitlization current stabilization circuit WL input;
Described its core of input rectifying filter circuit is 24 pulse wave rectifier transformers, and this transformer is composed in series at output by two transformer T1 and T2, and wherein T1 comprises first siding ring, and two second siding rings; T2 comprises first siding ring, and two second siding rings.Respectively the second siding ring output of two groups of transformers is connect to three-phase bridge rectifier circuit, Bing Jiang tetra-tunnel output series connection, are about to input three-phase alternating current and are rectified into direct current.24 pulse wave rectifier transformer outputs are connected with input filter circuit input, and input filter circuit is made up of two-stage LC filter circuit, can effectively reduce galvanic low-frequency ripple.
(2) digitlization current stabilization circuit WL, for by the direct current process multitube misphase copped wave after rectification, forms the direct current of outputting current steadily.This partial circuit adopts multitube stagger parallel connection copped wave topology, i.e. four IGBT(SK1, SK2, SK3, SK4) parallel connection, its input is connected with the two-stage LC filter circuit output of current rectifying and wave filtering circuit ZL.The gate pole of IGBT is connected with the pwm signal output of control circuit KZ.
(3) output filter circuit LB, curbs for the galvanic high-frequency noise that digitlization current stabilization circuit WL is produced, and it is between digitlization current stabilization circuit WL and output.
(4) control circuit KZ; Control circuit, for generation of pwm signal, is controlled chopping frequency.Described control circuit, its input exchanges inlet wire with current rectifying and wave filtering circuit ZL input joins, and its output is connected with the gate pole of the IGBT of digitlization current stabilization circuit WL.
As shown in Figure 2, in described input rectifying filter circuit ZL, four road and bridge formula rectification module N1, N2, N3, N4 series connection, the negative terminal of N1 is connected with the anode of N2, the negative terminal of N3 is connected with the anode of N4, and the anode of N1 is connected with the first end of capacitor C 1, and the negative terminal of N2 is connected with capacitor C 2 second ends, the anode of N3 is connected with the first end of capacitor C 3, and the negative terminal of N4 is connected with capacitor C 4 second ends.In two-stage LC filter circuit, the first end of the inductance L 1-1 of first order LC filter circuit is connected with capacitor C 1 first end, the first end of inductance L 1-2 is connected with the second end of capacitor C 2, the second end of inductance L 1-2 is connected with the second end of inductance L 2-1, the first end of inductance L 2-1 is connected with the first end of capacitor C 3, and the first end of inductance L 2-2 is connected with the second end of capacitor C 4; Capacitor C 5, C6, C7, C8 are connected in parallel between inductance L 1-1 first end and inductance L 2-2 the second end, and wherein the anode of capacitor C 5, C7 is connected with inductance L 1-1 first end, and negative terminal is connected with inductance L 2-2 the second end.The first end of the inductance L 3-1 of the second utmost point LC filter circuit is connected with the second end of inductance L 1-1, the first end of inductance L 3-2 is connected with the second end of inductance L 2-2, capacitor C 9 and C10 are connected in parallel between the second end of inductance L 3-1 and the second end of inductance L 3-2, and resistance R 4 is connected in parallel between the second end of inductance L 3-1 and the second end of inductance L 3-2.
As shown in Figure 3, four IGBT(SK1, SK2, SK3, the SK4 of the copped wave of multitube stagger parallel connection in digitlization current stabilization circuit WL) collector electrode is connected in parallel, the output of each road copped wave circuit links together, form four tunnel copped wave circuit parallel connections, capacitor C 13, C14 are connected in digitlization current stabilization circuit input in parallel.After the first end of the first end of inductance L 5-1 and inductance L 5-2, circuit is output filter circuit.The first end of inductance L 5-1 is connected with the positive output end of parallel connection chopping circuit, and the first end of inductance L 5-2 is connected with the negative output terminal of parallel connection chopping circuit, and capacitor C 15 is connected in parallel between the second end of inductance L 5-1 and the second end of inductance L 5-2.The first end of capacitor C 16 is connected with inductance L 5-1 the second end, the second end ground connection; The second end of capacitor C 17 is connected with inductance L 5-2 the second end, first end ground connection.L6, L7 are choke, and C18 is attempted by between C16, C17, and the first end of C18 is connected with the first end of C16, and the second end of C18 is connected with the second end of C17.VD1 is diode, and its anode is connected with C18 the second end, and negative terminal is connected with C18 first end.In parallel with VD1 after C19 and C20 are connected in series, C19 first end is connected with VD1 negative terminal, and the second end is connected ground connection with C20 first end, and C20 the second end is connected with VD1 anode.
As shown in Figure 4, control circuit KZ is mainly made up of three parts: the control of DBB1 power supply, DBB2 data acquisition, DBB3 protection.Wherein DBB2 data acquisition is mainly used in feedback signal processing, comprises current feedback, load voltage feedback, feed-forward voltage feedback etc.It offers the control of DDB1 power supply after feedback signal is processed.The control of DBB1 power supply mainly utilizes the signal being produced by DBB2 and DBB3, judges, calculates.Produce pwm control signal GA, GB, GC, GD, main contactor switching signal, soft start switching signal etc.DBB3 protection part mainly for generation of load cut off the water supply, the guard signal such as load overtemperature, main contactor combined floodgate, overvoltage, phase shortage.
That in the utility model, power switch unit is selected is IGBT(Insulated Gate Bipolar Transistor) insulated gate bipolar transistor.By adding forward voltage to gate pole, make IGBT conducting, otherwise add reverse swing door pole tension, turn-off IGBT.The electric current that flows through power switch by control forms stable output.
Input AC voltage is first through EMI(Electromagnetic interference filter) after filtering, be added to input rectifying filter circuit, first carry out rectification, 24 pulse wave rectifier circuit are two 12 commutating phase transformers such as capacity such as grade by each 7.5 ° of left and right phase shift, through 4 groups of three phase full wave rectifications output composition in parallel.Wherein the first siding ring of T1, T2 is delta connection, and two groups of coils of secondary side are respectively triangle and star connection, and it is 1 × 10 that 24 pulse waves are not controlled rectification ripple factor
-4, harmonic wave low-limit frequency is 1200Hz, the direct current obtaining after 24 pulse wave rectifiers, then be added on two-stage LC filter circuit.By after two-stage LC filtering, make system low frequency line be less than ± 1 × 10
-4.Wherein, L1-1, L1-2, L2-1, L2-2, C5, C6, C7, C8 form first order LC filter circuit, and L3-1, L3-2, C9, C10, R4 form second level LC filter circuit, and wherein R4 is that energy discharges resistance.
After input rectifying filtering, the stable DC electricity of formation is added to digitlization current stabilization circuit.Digitlization current stabilization circuit You Si road chopper circuit composes in parallel, and describes below with the operation principle on a road wherein.When the driving control wave being produced by control circuit makes after SK1 conducting, capacitor C 15 starts charging, and output voltage is added to the two ends of load, in the charging process of C15, electric current in inductance L 5-1, L5-2 starts to increase gradually, and the ability of storage also increases gradually.Now fly-wheel diode VD1 because of reverse bias by.In the time driving control wave to make SK1 cut-off, the electric current in inductance L 5-1, L5-2 reduces, and the induced potential that inductance two ends produce makes fly-wheel diode VD2 conducting.The magnetic field energy of storing in inductance passes to load by diode VD2, when load voltage is during lower than capacitor C 15 both end voltage, capacitor C 15 is just to load discharge, and what control drive pulse signal went round and began again makes chopper circuit repeat said process, finally makes output voltage trend towards some definite values.
Use the multitube stagger parallel connection function of digital controller, select misphase 4 phases.The switching frequency of 4 IGBT is 16kHz, and rear output frequency in parallel has improved 4 times, can reach 64kHz.Ripple is only the 1/16(1/n of single copped wave circuit
2: n is misphase number), improved chopping frequency, by High frequency filter loop, high frequency ripple is well suppressed, ensure system high-frequency ripple index be better than ± 1 × 10
-4.Meanwhile, the volume of filter is also less.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if to these amendments of the present utility model with within modification belongs to the scope of the utility model claim and equivalent technology thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (4)
1. the switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase, comprising:
Input rectifying filter circuit, for input three-phase alternating current is rectified into direct current in 24 pulse wave rectifier modes, and filters out low-frequency noise, and described input rectifying filter circuit is connected with digitlization current stabilization circuit input;
Digitlization current stabilization circuit, for by the direct current process multitube misphase copped wave after rectification, forms the direct current of outputting current steadily; Digitlization current stabilization circuit adopts four IGBT parallel connections, forms multitube stagger parallel connection copped wave topology, and its input is connected with the output of input rectifying filter circuit, and the gate pole of IGBT is connected with the pwm signal output of control circuit;
Output filter circuit, between digitlization current stabilization circuit and output, curbs for the galvanic high-frequency noise that digitlization current stabilization circuit is produced;
Control circuit, for generation of pwm signal, controls chopping frequency, and its input exchanges inlet wire with the input of input rectifying filter circuit and joins, and its output is connected with the gate pole of the IGBT of digitlization current stabilization circuit.
2. the switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase as claimed in claim 1, it is characterized in that: described input rectifying filter circuit comprises 24 pulse wave rectifier transformer and input filter circuits, 24 described pulse wave rectifier transformers are composed in series at output by two groups of transformers, every group of transformer comprises respectively first siding ring, and two second siding rings; Respectively the second siding ring output of two groups of transformers is connect to three-phase bridge rectifier circuit, Bing Jiang tetra-tunnel output series connection, are about to input three-phase alternating current and are rectified into direct current; 24 outputs of pulse wave rectifier transformer and the input of input filter circuit are connected, and input filter circuit is made up of two-stage LC filter circuit.
3. the switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase as claimed in claim 1, it is characterized in that: in described digitlization current stabilization circuit, the collector electrode of four IGBT of multitube stagger parallel connection copped wave is connected in parallel, the output of each road copped wave circuit links together, form four tunnel copped wave circuit parallel connections, the first electric capacity and the second Capacitance parallel connection are connected to digitlization current stabilization circuit input; The first end of the first inductance is connected with the positive output end of parallel connection chopping circuit, the first end of the second inductance is connected with the negative output terminal of parallel connection chopping circuit, between the second end of the first inductance and the second end of the second inductance, be connected the 3rd electric capacity, the second end of the first inductance is connected with the first end of the 4th electric capacity, the second end ground connection of the 4th electric capacity; The second end of the second inductance is connected with the second end of the 5th electric capacity, the first end ground connection of the 5th electric capacity.
4. the switching power circuit based on 20 pulse wave rectifiers and the copped wave of multitube misphase as claimed in claim 1, it is characterized in that: described control circuit adopts full-digital control, comprise power-supply controller of electric and data acquisition unit, obtain feedback signal at output by DC current sensor, produce and provide the reference signal of ultra-high stable degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835940.3U CN203632568U (en) | 2013-12-18 | 2013-12-18 | Switch power supply circuit based on twenty pulse wave rectification and multi-tube phase dislocation chopping |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320835940.3U CN203632568U (en) | 2013-12-18 | 2013-12-18 | Switch power supply circuit based on twenty pulse wave rectification and multi-tube phase dislocation chopping |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683992A (en) * | 2013-12-18 | 2014-03-26 | 中国原子能科学研究院 | Switching power supply circuit based on twenty pulse wave rectifying and multi-tube phase dislocation chopping |
| CN107839525A (en) * | 2017-10-25 | 2018-03-27 | 安徽中科海奥电气股份有限公司 | A kind of 10KV inputs multichannel rectification copped wave integration charging station |
-
2013
- 2013-12-18 CN CN201320835940.3U patent/CN203632568U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683992A (en) * | 2013-12-18 | 2014-03-26 | 中国原子能科学研究院 | Switching power supply circuit based on twenty pulse wave rectifying and multi-tube phase dislocation chopping |
| CN107839525A (en) * | 2017-10-25 | 2018-03-27 | 安徽中科海奥电气股份有限公司 | A kind of 10KV inputs multichannel rectification copped wave integration charging station |
| CN107839525B (en) * | 2017-10-25 | 2024-03-29 | 安徽中科海奥电气股份有限公司 | 10KV input multipath rectification and chopping integrated charging station |
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