CN105226942A - A kind of modified model L-Buck tetra-level circuit - Google Patents

A kind of modified model L-Buck tetra-level circuit Download PDF

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CN105226942A
CN105226942A CN201510690787.3A CN201510690787A CN105226942A CN 105226942 A CN105226942 A CN 105226942A CN 201510690787 A CN201510690787 A CN 201510690787A CN 105226942 A CN105226942 A CN 105226942A
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diode
switching tube
positive pole
electric capacity
circuit
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CN201510690787.3A
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CN105226942B (en
Inventor
贺明智
何�雄
赵与辉
董宁
李志君
李金芝
郑琼林
王艺新
李连印
杨晓峰
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JINGYI CHUNSHU RECTIFIER CO Ltd BEIJING
Beijing Jiaotong University
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JINGYI CHUNSHU RECTIFIER CO Ltd BEIJING
Beijing Jiaotong University
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Abstract

The present invention relates to a kind of modified model L-Buck tetra-level circuit, electric capacity C 3, C 2, C 1, the longitudinal axis of circuit topology in series, and in parallel with input power V, and circuit comprises switching tube S 1, S 2, S 3, S 4, S 5, S 6, in circuit, be also provided with C s1, C s2, C s3as absorbing circuit.Modified model L-Buck tetra-level circuit of the present invention, the L-type four level Buck circuit that original band absorbs is improved, part of devices is combined together and forms brand-new circuit, eliminate portion of material, reduce cost, but do not affect actual assimilation effect and service behaviour.

Description

A kind of modified model L-Buck tetra-level circuit
Technical field
The present invention relates to electrical engineering multi-level converter field, is a kind of modified model L-Buck tetra-level circuit specifically.
Background technology
Along with the develop rapidly of modern society in recent years, power electronic technology has been widely applied to every field.In electric and electronic technical field, multilevel technology has become the study hotspot in this field, studies widely.
The key technology of multi-level converter is converter topology and control algolithm.A good topological circuit, can not only realize power optimization, also can solve various before Problems existing.
Current multi-level converter topology, there is the advantages such as output voltage is high, harmonic content is low, voltage change ratio is little, device for power switching voltage stress is little, switching frequency is low, can be applicable to the field such as electric power system static reactive and the speed governing of middle pressure high power AC.
But, due to increasing of level, the quantity of switching device is also increased.Consider on stray parameter impact after, make switching device wherein can produce higher Voltage and Current Spikes when opening shutoff.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of modified model L-Buck tetra-level circuit, part of devices in absorbing circuit and L step-down circuit is combined together and forms brand-new circuit, solve switching device and can produce higher due to voltage spikes problem when opening shutoff.
For reaching above object, the technical scheme that the present invention takes is:
A kind of modified model L-Buck tetra-level circuit, is characterized in that, comprising:
Electric capacity C 3, C 2, C 1, the longitudinal axis of circuit topology in series, and in parallel with input power V,
Switching tube S 1drain electrode be connected with the positive pole of input power V,
Switching tube S 1source electrode and switching tube S 2drain electrode be connected,
Switching tube S 2source electrode and inductance L aone end be connected, inductance L athe other end and load R lone end be connected,
Load R lthe other end and switching tube S 6drain electrode be connected,
Switching tube S 6source electrode and switching tube S 5drain electrode be connected,
Switching tube S 5source electrode and switching tube S 4drain electrode be connected,
Switching tube S 4source electrode be connected with the negative pole of input power V,
Switching tube S 3drain electrode and electric capacity C 3, C 2common port be connected,
Switching tube S 3source electrode and diode D 3positive pole be connected,
Diode D 3negative pole and inductance L aone end be connected,
Electric capacity C s3one end be connected with the positive pole of input power V, the other end respectively with diode D 9negative pole, diode D 10positive pole be connected,
Diode D 10negative pole and diode D 3negative pole be connected,
Diode D 9positive pole and electric capacity C 3, C 2common port be connected,
Electric capacity C s2one end and electric capacity C 3, C 2common port be connected, the other end respectively with diode D 7negative pole, diode D 8positive pole be connected,
Diode D 7positive pole and electric capacity C 2, C 1common port be connected,
Diode D 8negative pole and diode D 3positive pole be connected,
Electric capacity C s1one end be connected with the positive pole of input power V, the other end respectively with diode D 4negative pole, diode D 1positive pole be connected,
Diode D 4positive pole and switching tube S 4drain electrode be connected,
Diode D 1negative pole respectively with diode D 5negative pole, diode D 2positive pole be connected,
Diode D 5positive pole and switching tube S 4drain electrode be connected,
Diode D 2negative pole and diode D 3positive pole be connected,
Diode D 6positive pole and switching tube S 5drain electrode be connected,
Diode D 6negative pole and diode D 3positive pole be connected.
On the basis of technique scheme, C s1, C s2, C s3for non-polar thin-film capacitor.
On the basis of technique scheme, electric capacity C 3, C 2, C 1for electrochemical capacitor.
On the basis of technique scheme, C s1, C s2, C s3capacitor's capacity very little, much smaller than output capacitance C 1, C 2, C 3.
On the basis of technique scheme, switching tube S 1, S 2, S 3, S 4, S 5, S 6be MOSFET.
On the basis of technique scheme, when frequency requirement is not high, when current requirements is larger, switching tube S 1, S 2, S 3, S 4, S 5, S 6be IGBT.
Modified model L-Buck tetra-level circuit of the present invention, part of devices in absorbing circuit and L step-down circuit is combined together and forms brand-new circuit, solve switching device and can produce higher due to voltage spikes problem when opening shutoff, realize powerful steady voltage and export.
Modified model L-Buck tetra-level circuit of the present invention, solves switching tube overvoltage spike and crosses the problems such as high, reduce the requirement of the withstand voltage allowance of switch tube.
Modified model L-Buck tetra-level circuit of the present invention, achieve high voltage input, the function of low-voltage output, saves transformer; Add absorbing circuit, to reduce the due to voltage spikes of switching tube, and the mode by feeding back, by the energy trasfer telegram in reply road partially absorbed, thus the requirement that the switch tube reduced is withstand voltage, protect respective switch pipe, and decrease the power loss of output.
Accompanying drawing explanation
The present invention has following accompanying drawing:
Fig. 1 structure chart of the present invention;
Fig. 2 circuit working schematic diagram 1;
Fig. 3 circuit working schematic diagram 2;
Fig. 4 circuit working schematic diagram 3;
Fig. 5 circuit working schematic diagram 4;
Fig. 6 circuit working schematic diagram 5;
Fig. 7 circuit working schematic diagram 6;
Fig. 8 circuit working schematic diagram 7;
Fig. 9 circuit working schematic diagram 8;
Figure 10 circuit working schematic diagram 9.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Fig. 1 ~ 10, modified model L-Buck tetra-level circuit of the present invention, comprising:
Electric capacity C 3, C 2, C 1, the longitudinal axis of circuit topology in series, and in parallel with input power V,
Switching tube S 1drain electrode be connected with the positive pole of input power V,
Switching tube S 1source electrode and switching tube S 2drain electrode be connected,
Switching tube S 2source electrode and inductance L aone end be connected, inductance L athe other end and load R lone end be connected,
Load R lthe other end and switching tube S 6drain electrode be connected,
Switching tube S 6source electrode and switching tube S 5drain electrode be connected,
Switching tube S 5source electrode and switching tube S 4drain electrode be connected,
Switching tube S 4source electrode be connected with the negative pole of input power V,
Switching tube S 3drain electrode and electric capacity C 3, C 2common port be connected,
Switching tube S 3source electrode and diode D 3positive pole be connected,
Diode D 3negative pole and inductance L aone end be connected,
Electric capacity C s3one end be connected with the positive pole of input power V, the other end respectively with diode D 9negative pole, diode D 10positive pole be connected,
Diode D 10negative pole and diode D 3negative pole be connected,
Diode D 9positive pole and electric capacity C 3, C 2common port be connected,
Electric capacity C s2one end and electric capacity C 3, C 2common port be connected, the other end respectively with diode D 7negative pole, diode D 8positive pole be connected,
Diode D 7positive pole and electric capacity C 2, C 1common port be connected,
Diode D 8negative pole and diode D 3positive pole be connected,
Electric capacity C s1one end be connected with the positive pole of input power V, the other end respectively with diode D 4negative pole, diode D 1positive pole be connected,
Diode D 4positive pole and switching tube S 4drain electrode be connected,
Diode D 1negative pole respectively with diode D 5negative pole, diode D 2positive pole be connected,
Diode D 5positive pole and switching tube S 4drain electrode be connected,
Diode D 2negative pole and diode D 3positive pole be connected,
Diode D 6positive pole and switching tube S 5drain electrode be connected,
Diode D 6negative pole and diode D 3positive pole be connected.
In circuit of the present invention, electric capacity C 3, C 2, C 1, the longitudinal axis of circuit topology in series, and in parallel with input power V, and circuit comprises switching tube S 1, S 2, S 3, S 4, S 5, S 6, in circuit, be also provided with C s1, C s2, C s3as absorbing circuit.
On the basis of technique scheme, C s1, C s2, C s3for non-polar thin-film capacitor.
On the basis of technique scheme, electric capacity C 3, C 2, C 1for electrochemical capacitor.
On the basis of technique scheme, C s1, C s2, C s3capacitor's capacity very little, much smaller than output capacitance C 1, C 2, C 3.
On the basis of technique scheme, switching tube S 1, S 2, S 3, S 4, S 5, S 6be MOSFET (Metal-Oxide-SemiconductorField-EffectTransistor Metal-Oxide Semiconductor field-effect transistor).
On the basis of technique scheme, when frequency requirement is not high, when current requirements is larger, switching tube S 1, S 2, S 3, S 4, S 5, S 6be IGBT (InsulatedGateBipolarTransistor insulated gate bipolar transistor).
As shown in Fig. 2 ~ 10, circuit working principle is as follows:
1, switching tube S 4, S 5, S 6keep open-minded, all the other turn off.Input power V is to electric capacity C 1, C 2, C 3charging.Electric capacity C 1by diode D 2, D 3, switch mosfet pipe S 4, S 5, S 6and inductance L ato load R lpower supply.C s1by diode D 1, D 2, D 3, switch mosfet pipe S 4, S 5, S 6and inductance L agive energy back to load R lpower supply.As shown in Figure 2.
2, switching tube S 4turn off.Input power V is to electric capacity C 1, C 2, C 3charging.Electric capacity C 1by diode D 2, D 3, D 4, switch mosfet pipe S 5, S 6and inductance L ato load R lpower supply, and to C s1charging, passes through C s1absorb S 4turn off the peak voltage produced.Due to C s1capacitance is very little, charges electricity very soon, is then disconnected from the circuit.As shown in Figure 3.
3, input power V is to electric capacity C 1, C 2, C 3charging.Inductance L aby switching tube S 6, diode D 3, D 6to load R lpower supply.As shown in Figure 4.
4, switching tube S 3open-minded.Input power V is to electric capacity C 1, C 2, C 3charging.Electric capacity C 2by diode D 3, D 5, switch mosfet pipe S 3, S 5, S 6and inductance L ato load R lpower supply.C s2by diode D 3, D 5, D 7, switch mosfet pipe S 3, S 5, S 6and inductance L aportion of energy is fed back to inductance L awith load R lpower supply.As shown in Figure 5.
5, switching tube S 3turn off.Input power V is to electric capacity C 1, C 2, C 3charging.Electric capacity C 2by diode D 3, D 5, D 8, switch mosfet pipe S 5, S 6and inductance L ato load R lpower supply, and to C s2charging, passes through C s2absorb S 3turn off the peak voltage produced.Due to C s2capacitance is very little, charges electricity very soon, is then disconnected from the circuit.As shown in Figure 6.
6, switching tube S 5turn off, input power V is to electric capacity C 1, C 2, C 3charging.Inductance L aby switching tube S 6, diode D 3, D 6to load R lpower supply.As shown in Figure 7.
7, switching tube S 1, S 2open-minded.Input power V is to electric capacity C 1, C 2, C 3charging.Electric capacity C 3by diode D 6, switch mosfet pipe S 1, S 2, S 3, S 6and inductance L ato load R lpower supply.C s3by diode D 6, D 9, switch mosfet pipe S 1, S 2, S 3, S 6and inductance L aportion of energy is fed back to inductance L awith load R lpower supply.As shown in Figure 8.
8, switching tube S 1, S 2turn off.Input power V is to electric capacity C 1, C 2, C 3charging.Electric capacity C 3by diode D 6, D 10, switch mosfet pipe S 3, S 6and inductance L ato load R lpower supply, and to C s3charging, passes through C s3absorb switching tube S 1, S 2turn off the peak voltage produced.Due to C s3capacitance is very little, charges electricity very soon, is then disconnected from the circuit.As shown in Figure 9.
9, switching tube S 3turn off, input power V is to electric capacity C 1, C 2, C 3charging.Inductance L aby switching tube S 6, diode D 3, D 6to load R lpower supply.As shown in Figure 10.Continue the circulation of step 1-9 afterwards.
The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.

Claims (6)

1. modified model L-Buck tetra-level circuit, is characterized in that, comprising:
Electric capacity C 3, C 2, C 1, the longitudinal axis of circuit topology in series, and in parallel with input power V,
Switching tube S 1drain electrode be connected with the positive pole of input power V,
Switching tube S 1source electrode and switching tube S 2drain electrode be connected,
Switching tube S 2source electrode and inductance L aone end be connected, inductance L athe other end and load R lone end be connected,
Load R lthe other end and switching tube S 6drain electrode be connected,
Switching tube S 6source electrode and switching tube S 5drain electrode be connected,
Switching tube S 5source electrode and switching tube S 4drain electrode be connected,
Switching tube S 4source electrode be connected with the negative pole of input power V,
Switching tube S 3drain electrode and electric capacity C 3, C 2common port be connected,
Switching tube S 3source electrode and diode D 3positive pole be connected,
Diode D 3negative pole and inductance L aone end be connected,
Electric capacity C s3one end be connected with the positive pole of input power V, the other end respectively with diode D 9negative pole, diode D 10positive pole be connected,
Diode D 10negative pole and diode D 3negative pole be connected,
Diode D 9positive pole and electric capacity C 3, C 2common port be connected,
Electric capacity C s2one end and electric capacity C 3, C 2common port be connected, the other end respectively with diode D 7negative pole, diode D 8positive pole be connected,
Diode D 7positive pole and electric capacity C 2, C 1common port be connected,
Diode D 8negative pole and diode D 3positive pole be connected,
Electric capacity C s1one end be connected with the positive pole of input power V, the other end respectively with diode D 4negative pole, diode D 1positive pole be connected,
Diode D 4positive pole and switching tube S 4drain electrode be connected,
Diode D 1negative pole respectively with diode D 5negative pole, diode D 2positive pole be connected,
Diode D 5positive pole and switching tube S 4drain electrode be connected,
Diode D 2negative pole and diode D 3positive pole be connected,
Diode D 6positive pole and switching tube S 5drain electrode be connected,
Diode D 6negative pole and diode D 3positive pole be connected.
2. modified model L-Buck tetra-level circuit as claimed in claim 1, is characterized in that: C s1, C s2, C s3for non-polar thin-film capacitor.
3. modified model L-Buck tetra-level circuit as claimed in claim 1, is characterized in that: electric capacity C 3, C 2, C 1for electrochemical capacitor.
4. modified model L-Buck tetra-level circuit as claimed in claim 1, is characterized in that: C s1, C s2, C s3capacitor's capacity very little, much smaller than output capacitance C 1, C 2, C 3.
5. modified model L-Buck tetra-level circuit as claimed in claim 1, is characterized in that: switching tube S 1, S 2, S 3, S 4, S 5, S 6be MOSFET.
6. modified model L-Buck tetra-level circuit as claimed in claim 1, is characterized in that: when frequency requirement is not high, when current requirements is larger, switching tube S 1, S 2, S 3, S 4, S 5, S 6be IGBT.
CN201510690787.3A 2015-10-22 2015-10-22 A kind of tetra- level circuits of modified L-Buck Active CN105226942B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030021131A1 (en) * 2001-08-13 2003-01-30 Nadot Vladimir V. Fault tolerant power supply circuit
CN101355302A (en) * 2008-09-16 2009-01-28 北京交通大学 Topological structure of L-shaped step-down converter
CN201608539U (en) * 2009-12-31 2010-10-13 杭州浙大太阳电气有限公司 Passive lossless clamping one-phase high-gain convertor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030021131A1 (en) * 2001-08-13 2003-01-30 Nadot Vladimir V. Fault tolerant power supply circuit
CN101355302A (en) * 2008-09-16 2009-01-28 北京交通大学 Topological structure of L-shaped step-down converter
CN201608539U (en) * 2009-12-31 2010-10-13 杭州浙大太阳电气有限公司 Passive lossless clamping one-phase high-gain convertor

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