CN103887996A - Transformer-isolated soft commutation chopping power supply main circuit for storage battery - Google Patents
Transformer-isolated soft commutation chopping power supply main circuit for storage battery Download PDFInfo
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- CN103887996A CN103887996A CN201410128277.2A CN201410128277A CN103887996A CN 103887996 A CN103887996 A CN 103887996A CN 201410128277 A CN201410128277 A CN 201410128277A CN 103887996 A CN103887996 A CN 103887996A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention belongs to the technical field of power supply circuits and discloses a transformer-isolated soft commutation chopping power supply main circuit for a storage battery. The circuit comprises a transformer, a rectifying circuit, a filter capacitor, a subsidiary loop, a main follow current loop and a load subcircuit, wherein the transformer is connected with an alternating current power supply, the output end of the transformer is connected with the rectifying circuit, the two output ends of the rectifying circuit are connected with the two ends of the filter capacitor, and the filter capacitor is connected with the subsidiary loop, the main follow current loop and the load subcircuit in parallel. According to the circuit, electric isolation can be achieved by means of the transformer, the current spike and voltage spike are reduced, the service life is prolonged, electromagnetic interference is reduced, and working safety and reliability of the power supply circuit are improved.
Description
Technical field
The present invention relates to a kind of storage battery transformer isolation type soft commutation power of chopping main circuit.
Background technology
In energy-storage system of accumulator, storage battery is the power shortage due to improper use often, need to utilize AC network to supplement and fill energy.Consider the particularity of battery applications,, high efficiency high-power except requiring to the design of charge power supply, volume are little, quality light, charge power supply main circuit is as far as possible simple, practical and reliable on the basis that meets above-mentioned requirements.
In conventional power of chopping main circuit, realize buck converter main circuit form and have various ways, according to charge in batteries requirement, wherein rectifier series direct current Chopper Regulators, with its conversion efficiency feature high, simple in structure, is one of first-selected AC-DC-DC translation circuit topological structure, but, the major defect of its existence is: in energy-storage system of accumulator, because power of chopping transmitted power is large, output voltage is high, and the electric current that flows through switching tube is large.Under this condition of work, power switch pipe and diode are alternate conduction, in commutation course, very large di/dt will be produced, du/dt, particularly when power switch pipe transfers conducting to by cut-off, diode is transferred to by conducting in the process of cut-off, due to the diode reverse conducting reason of recovery time, diode is equivalent to short-circuit condition, now, by power switch pipe, diode, electric capacity forms loop, be equivalent to electric capacity direct short-circuit, and because the voltage on electric capacity is higher, now will on power switch pipe and diode, produce and flow through very large current spike, produce very large di/dt, this very large di/dt and current spike value not only cause serious electromagnetic interference problem, more seriously it damages the inefficacy that causes fast recovery diode, thereby cause the fault of whole translation circuit.
This failure phenomenon is a common phenomenon in current chopper circuit, especially in high-power high voltage out-put supply converter, more easily occurs, and how to address the above problem is one of technological difficulties of current high-power power of chopping.
Summary of the invention
The present invention is for solving the problems of the prior art, a kind of storage battery transformer isolation type soft commutation power of chopping main circuit is provided, the present invention can utilize transformer to reach electrical isolation object, electric current, due to voltage spikes are reduced, thereby life-saving, minimizing electromagnetic interference, job security and the reliability of raising power circuit.
Technical scheme of the present invention is:
Transformer isolation type soft commutation power of chopping main circuit for a kind of storage battery, comprises transformer, rectification circuit, filter capacitor, subsidiary loop, main continuous current circuit, load branch; Described transformer is connected with AC power, and its output is connected with rectification circuit, and the output two ends of described rectification circuit and the two ends of filter capacitor join, and described filter capacitor is in parallel with subsidiary loop, main continuous current circuit, load branch respectively.
Described subsidiary loop comprises electric capacity one and auxiliary afterflow branch road, diode one, diode two, inductance one, diode three formations that route is connected in series are successively propped up in described auxiliary afterflow, and the positive pole of diode three connects the negative pole of filter capacitor by wire, one end of described electric capacity one is connected with the positive pole of filter capacitor by wire, and the other end of described electric capacity one is connected between diode one, diode two by wire; Between the anodal and auxiliary afterflow branch road of the positive terminal of described electric capacity one or filter capacitor, be provided with switch.
In described auxiliary afterflow branch road, diode one, diode two, the inductance one of serial connection are also parallel with electric capacity two successively, and described electric capacity two one end connect the negative pole of diode one by wire, and described electric capacity two other ends are connected between inductance one and diode three by wire.
Described main continuous current circuit is in series successively by diode, inductance two, and the negative pole of described diode connects one end of switch by wire, and the other end of inductance two connects the negative pole of filter capacitor by wire.
Described load branch comprises inductance and the load of series connection successively.
Preferably, described switch is power switch pipe, and the collector electrode of described power switch pipe connects the positive pole of filter capacitor, and the emitter of power switch pipe connects the node of parallel branch or the negative pole end of diode one.
Described rectification circuit is made up of rectifier diode four, diode five, diode six, diode seven.
Preferably, described diode, diode one, diode two and diode three are fast recovery diode.
Preferably, described inductance two is pulsactor.
The outstanding advantages that the present invention compared with prior art has is:
Technical solution of the present invention utilizes transformer to reach electrical isolation object, by increasing a small amount of inductance, electric capacity, diode component, very large current spike and di/dt, du/dt are not only solved, the shortcomings such as power switch tube lifetime is short, poor reliability are overcome in power of chopping main circuit, also reduce the electromagnetic interference of system, improved job security and the reliability of circuit.
Brief description of the drawings
Fig. 1 is conventional power of chopping main circuit;
Fig. 2 is storage battery of the present invention transformer isolation type soft commutation power of chopping main circuit.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
If Fig. 1 is conventional power of chopping main circuit, in Fig. 1, rectifier is output as power of chopping input voltage Uin, i.e. capacitor C both end voltage, and Uo is the output voltage of reduction voltage circuit, i.e. load Z both end voltage.
The course of work of this circuit is as follows: in the time of power switch tube S conducting, electric current flows through inductance L, load Z linear increasing through power switch tube S, electric energy is stored in inductance coil L with magnetic energy form, give load Z power supply simultaneously, capacitor C, power switch tube S, inductance L, load Z form loop, now, because the anode of diode D connects negatively, diode D is in cut-off state; In the time that power switch tube S transfers cut-off to by conducting, the energy being stored in inductance L discharges, and by diode D afterflow, maintains the power supply to load Z, and diode D, inductance L and load Z form loop.If periodically the conducting of power ratio control switching tube S with close, can realize energy step-down transmission (Uo≤Uin) to Uo by Uin, the output voltage U of circuit
o=δ U
in, the conducting duty ratio that wherein δ is power switch tube S.
For reaching above-mentioned step-down transmission, power switch tube S and diode D conducting and shutoff in turn, between the two, carry out frequently the change of current, its shortcoming is that, because power of chopping transmitted power is large, output voltage is high, the electric current that flows through switching tube is large, not only cause serious electromagnetic interference problem, more seriously it damages the inefficacy that causes fast recovery diode D, thereby causes the fault of whole translation circuit.
If Fig. 2 is storage battery of the present invention transformer isolation type soft commutation power of chopping main circuit, technical scheme of the present invention is:
Transformer isolation type soft commutation power of chopping main circuit for a kind of storage battery, comprises transformer Tr, rectification circuit, filter capacitor C, subsidiary loop, main continuous current circuit, load branch; Described transformer Tr is connected with AC power, and its output is connected with rectification circuit, and the output two ends of described rectification circuit and the two ends of filter capacitor C join, and described filter capacitor C is in parallel with subsidiary loop, main continuous current circuit, load branch respectively.
Described subsidiary loop comprises electric capacity one C1 and auxiliary afterflow branch road, diode one D1, diode two D2, inductance one L1, the diode three D3 formations that route is connected in series are successively propped up in described auxiliary afterflow, and the positive pole of diode three D3 connects the negative pole of filter capacitor C by wire, one end of described electric capacity one C1 is connected with the positive pole of filter capacitor C by wire, and the other end of described electric capacity one C1 is connected between diode one D1, diode two D2 by wire; Between the anodal and auxiliary afterflow branch road of the positive terminal of described electric capacity one C1 or filter capacitor C, be provided with switch.
In described auxiliary afterflow branch road, diode one D1, diode two D2, inductance one L1 of serial connection are also parallel with electric capacity two C2 successively, described electric capacity two C2 one end connect the negative pole of diode one D1 by wire, the described electric capacity two C2 other ends are connected between inductance one L1 and diode three D3 by wire.
Described main continuous current circuit is in series successively by diode D, inductance two L2, and the negative pole of described diode D connects one end of switch by wire, and the other end of inductance two L2 connects the negative pole of filter capacitor C by wire.
Described load branch comprises inductance L and the load Z of series connection successively.
Described switch is power switch tube S, and the collector electrode of described power switch tube S connects the positive pole of filter capacitor C, and the emitter of power switch tube S connects the node of parallel branch or the negative pole end of diode one D1.
Described rectification circuit is made up of rectifier diode four D4, diode five D5, diode six D6, diode seven D7.
Described diode D, diode one D1, diode two D2 and diode three D3 are fast recovery diode.
Described inductance two L2 are pulsactor.
Transformer isolation type soft commutation power of chopping main circuit for storage battery of the present invention, prior art with Fig. 1 is compared, electric power main circuit of the present invention has increased transformer Tr and rectifier diode four D4, diode five D5, diode six D6, diode seven D7 for electrical isolation, inductance two L2 have connected on the main power diode D of copped wave part, inductance two L2 are pulsactor, also increased the subsidiary loop being made up of electric capacity one C1, diode one D1, diode two D2, inductance one L1, diode three D3, its operation principle is as follows:
AC220V alternating current is through rectifier diode four D4, diode five D5, diode six D6, diode seven D7 and the filter capacitor C of rectification circuit, obtain direct voltage Uin, Uin is by the conducting and shutoff transferring energy of power switch tube S, and copped wave is output as load Z energy storage.
In the time that power switch tube S transfers cut-off to by conducting, due to the existence of electric capacity one C1, diode one D1, input current I
incharged to diode one D1 and to electric capacity one C1 by the power switch tube S change of current, postponed the shut-in time of power switch tube S, reduced du/dt, to the in addition suitable inhibition of the both end voltage of power switch tube S, play the effect of protection power switch tube S.Electric charge in electric capacity two C2 is discharged into load by diode three D3 afterflows, simultaneously along with electric capacity one C1 voltage raises gradually, flows through the electric current I of diode one D1
oto be decreased to gradually zero.Flow through the electric current I of diode D
1the increase of starting from scratch, although auxiliary afterflow bypass diodes one D1, diode two D2, inductance one L1, diode three D3 middle impedances than main continuous current circuit diode D, two L2 are large for inductance, also have part electric current and flow through.Until all electric currents all flow through from main continuous current circuit diode D, inductance two L2 and inductance L, complete like this commutation course of power switch tube S and diode D, for power switch tube S, the diode D change of current next time ready.
When power switch tube S is transferred to moment of conducting by cut-off, in main continuous current circuit diode D, inductance two L2, due to the existence of inductance two L2, this loop reverse recovery current spike is suppressed.In auxiliary afterflow bypass diodes one D1, diode two D2, inductance one L1, diode three D3, inductance one L1 also plays current spike inhibitory action, while is due to the existence of electric capacity two C2, power switch tube S is charged to electric capacity two C2 within the extremely short time of reverse recovery by diode three D3, also suppresses part current spike.After the complete conducting of power switch tube S, all auxiliary afterflow branch roads and a main continuous current circuit all end, and for load provides energy, complete like this commutation course of diode D and power switch tube S by inductance L, enter next switch periods.
A kind of storage battery of the present invention utilizes transformer to reach electrical isolation object with transformer isolation type soft commutation power of chopping main circuit, by increasing a small amount of inductance, electric capacity, diode component, current spike and di/dt, du/dt very large on main power device power switch tube S, diode D are not only solved, the shortcomings such as power switch tube lifetime is short, poor reliability are overcome in power of chopping main circuit, also reduce the electromagnetic interference of system, improved job security and the reliability of circuit.
Claims (5)
1. a transformer isolation type soft commutation power of chopping main circuit for storage battery, is characterized in that, comprises transformer Tr, rectification circuit, filter capacitor C, subsidiary loop, main continuous current circuit, load branch; Described transformer Tr is connected with AC power, and its output is connected with rectification circuit, and the output two ends of described rectification circuit and the two ends of filter capacitor C join, and described filter capacitor C is in parallel with subsidiary loop, main continuous current circuit, load branch respectively;
Described subsidiary loop comprises electric capacity one C1 and auxiliary afterflow branch road, diode one D1, diode two D2, inductance one L1, the diode three D3 formations that route is connected in series are successively propped up in described auxiliary afterflow, and the positive pole of diode three D3 connects the negative pole of filter capacitor C by wire, one end of described electric capacity one C1 is connected with the positive pole of filter capacitor C by wire, and the other end of described electric capacity one C1 is connected between diode one D1, diode two D2 by wire; Between the anodal and auxiliary afterflow branch road of the positive terminal of described electric capacity one C1 or filter capacitor C, be provided with switch;
In described auxiliary afterflow branch road, diode one D1, diode two D2, inductance one L1 of serial connection are also parallel with electric capacity two C2 successively, described electric capacity two C2 one end connect the negative pole of diode one D1 by wire, the described electric capacity two C2 other ends are connected between inductance one L1 and diode three D3 by wire;
Described main continuous current circuit is in series successively by diode D, inductance two L2, and the negative pole of described diode D connects one end of switch by wire, and the other end of inductance two L2 connects the negative pole of filter capacitor C by wire;
Described load branch comprises inductance L and the load Z of series connection successively.
2. transformer isolation type soft commutation power of chopping main circuit for a kind of storage battery as claimed in claim 1, it is characterized in that, described switch is power switch tube S, the collector electrode of described power switch tube S connects the positive pole of filter capacitor C, and the emitter of power switch tube S connects the node of parallel branch or the negative pole end of diode one D1.
3. transformer isolation type soft commutation power of chopping main circuit for a kind of storage battery as claimed in claim 1, is characterized in that, described rectification circuit is made up of rectifier diode four D4, diode five D5, diode six D6, diode seven D7.
4. transformer isolation type soft commutation power of chopping main circuit for a kind of storage battery as claimed in claim 1, is characterized in that, described diode D, diode one D1, diode two D2 and diode three D3 are fast recovery diode.
5. transformer isolation type soft commutation power of chopping main circuit for a kind of storage battery as claimed in claim 1, is characterized in that, described inductance two L2 are pulsactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410128277.2A CN103887996A (en) | 2014-04-01 | 2014-04-01 | Transformer-isolated soft commutation chopping power supply main circuit for storage battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410128277.2A CN103887996A (en) | 2014-04-01 | 2014-04-01 | Transformer-isolated soft commutation chopping power supply main circuit for storage battery |
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| CN103887996A true CN103887996A (en) | 2014-06-25 |
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| CN201410128277.2A Pending CN103887996A (en) | 2014-04-01 | 2014-04-01 | Transformer-isolated soft commutation chopping power supply main circuit for storage battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987914A (en) * | 2020-08-03 | 2020-11-24 | 哈尔滨工程大学 | Isolated full-bridge converter |
| CN112701896A (en) * | 2020-12-03 | 2021-04-23 | 佛山科学技术学院 | Lossless absorption soft switching circuit based on Buck |
| CN112803935A (en) * | 2020-12-29 | 2021-05-14 | 联合汽车电子有限公司 | High-frequency current circuit |
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| US6147477A (en) * | 1995-11-28 | 2000-11-14 | Fujitsu Limited | DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon |
| CN201563061U (en) * | 2009-11-05 | 2010-08-25 | 福州大学 | Lifting voltage type soft switch direct current converter |
| CN102223063A (en) * | 2011-06-15 | 2011-10-19 | 河北科技大学 | Soft current conversion main circuit of bidirectional DC/DC (Direct Current/Direct Current) convertor for battery energy storage system |
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2014
- 2014-04-01 CN CN201410128277.2A patent/CN103887996A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147477A (en) * | 1995-11-28 | 2000-11-14 | Fujitsu Limited | DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon |
| CN201563061U (en) * | 2009-11-05 | 2010-08-25 | 福州大学 | Lifting voltage type soft switch direct current converter |
| CN102223063A (en) * | 2011-06-15 | 2011-10-19 | 河北科技大学 | Soft current conversion main circuit of bidirectional DC/DC (Direct Current/Direct Current) convertor for battery energy storage system |
Non-Patent Citations (1)
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| 汪殿龙等: "一种基于Buck软换流型DC-DC电路脉冲TIG焊机", 《电焊机》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987914A (en) * | 2020-08-03 | 2020-11-24 | 哈尔滨工程大学 | Isolated full-bridge converter |
| CN111987914B (en) * | 2020-08-03 | 2024-06-04 | 哈尔滨工程大学 | Isolation full-bridge converter |
| CN112701896A (en) * | 2020-12-03 | 2021-04-23 | 佛山科学技术学院 | Lossless absorption soft switching circuit based on Buck |
| CN112803935A (en) * | 2020-12-29 | 2021-05-14 | 联合汽车电子有限公司 | High-frequency current circuit |
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Application publication date: 20140625 |