CN101202160B - Auxiliary transformer circuit for inverter light load zero voltage zero current switch - Google Patents
Auxiliary transformer circuit for inverter light load zero voltage zero current switch Download PDFInfo
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- CN101202160B CN101202160B CN200610164339A CN200610164339A CN101202160B CN 101202160 B CN101202160 B CN 101202160B CN 200610164339 A CN200610164339 A CN 200610164339A CN 200610164339 A CN200610164339 A CN 200610164339A CN 101202160 B CN101202160 B CN 101202160B
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- auxiliary transformer
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- 238000004804 winding Methods 0.000 claims abstract description 37
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 8
- 230000010363 phase shift Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Inverter Devices (AREA)
Abstract
The invention provides an assistant transformer circuit used for an inverter light-load zero-current and zero-voltage switch. The technical proposal of the invention mainly comprises a circuit formed by a high frequency transformer and an assistant transformer. The proposal is characterized in that two sub-level output windings of the high frequency transformer Tr1 of an inverter phase-shift resonance circuit are connected with two primary windings of the assistant transformer Tr2; a sub-level winding of the assistant transformer Tr2 is connected with an adjustable resistance R. The assistant transformer Tr2 consists of two primary windings, a sub-level winding and a ferrite magnetic core. The two primary windings of the assistant transformer Tr2 are coupled according to the same phase with two sub-level windings of the inverter high frequency transformer Tr1. And the sub-level winding of the assistant transformer Tr2 is externally connected with the adjustable resistance R. The ferrite magnetic core of the assistant transformer Tr2 forms a closed magnetic circuit containing an air gap.
Description
Affiliated technical field
The present invention relates to be used for the inverter of power DC power supply, particularly a kind of auxiliary transformer circuit that is used for inverter light load zero voltage null current switch.
Background technology
At present, for realizing zero-voltage and zero-current switch, the inverter of middle power DC power supply adopts full-bridge inverting phase-shifting resonance circuit.But because the zero-voltage and zero-current switch condition of lagging leg is subjected to the influence of load variations, when load is in underloading or Light Condition, can lose the zero-voltage zero-current condition, increase switching loss, limit the zero-voltage zero-current working range of inverter phase-shifting resonance circuit.For solving the inverter zero-voltage and zero-current switch in underloading or the inoperable problem of Light Condition, traditional technical method is: at blocking capacitor device of elementary series connection of high frequency transformer, a secondary change of current inductance in parallel, at the circulation of resonant circuit introducing certain value, to realize the zero-voltage and zero-current switch condition.
But, the change of current inductance of the secondary parallel connection of high frequency transformer, it is very big to be under underloading or the Light Condition power consumption at inverter, and the circulation value of introducing resonant circuit is difficult for adjusting, and is unfavorable for the steady operation of system.
Summary of the invention
To be under underloading or the Light Condition power consumption at inverter very big in order to overcome existing change of current inductance, the circulation value of introducing resonant circuit is difficult for adjusting, the deficiency that is unfavorable for the steady operation of system the invention provides a kind of technical method that is used for the auxiliary transformer circuit of inverter light load zero voltage null current switch.
The technical solution adopted for the present invention to solve the technical problems is: the circuit that is connected on the auxiliary transformer composition of high frequency transformer outlet side, realize the zero-voltage and zero-current switch condition of work under inverter light load or the Light Condition, reduce loss, keep the steady operation of system.
In said method, the full-bridge inverting phase-shifting resonance circuit of inverter is realized the resonance commutation in the device for power switching switching process, guarantee lower switching loss.And after the switching tube conducting, adopt the method provider's wave voltage and the electric current of PWM modulation.The auxiliary transformer circuit that this design is adopted makes full use of magnetization energy and has widened soft-switching range.
In said method, two elementary windings of auxiliary transformer Tr2 are connected with two secondary winding of inverter high frequency transformer Tr1, the external adjustable resistance R of the secondary winding of auxiliary transformer Tr2, the FERRITE CORE of auxiliary transformer Tr2 forms a closed magnetic circuit that contains air gap.
The present invention also provides a kind of realization system for carrying out said process, and this system is by resonant type soft-switch and two kinds of circuit topology combinations of PWM, and the closed magnetic circuit that contains air gap of auxiliary transformer Tr2 is formed by two E type ferrite magnetic core butt joints.Two elementary windings place the upper and lower end parts of magnetic core respectively, and a secondary winding places the centre position.Elementary winding is connected according to couple in phase with two secondary winding of inverter high frequency transformer Tr1, the adjustable resistance R of the external control circulation of the secondary winding of auxiliary transformer Tr2.
The invention has the beneficial effects as follows that in the inverter power conversion process of middle power DC power supply, particularly under the light condition, the auxiliary transformer circuit power consumption is little, can adjust the circulation value of introducing resonant circuit, reach the purpose of the steady operation that helps system.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the auxiliary transformer circuit structure chart that is used for inverter light load zero voltage null current switch
Embodiment
In Fig. 1, inverter utilizes the external capacitor of resonant inductance and power device to realize zero-voltage and zero-current switch.V
InIt is the direct voltage source of input.Power device Q
1～Q
2The brachium pontis of forming is leading arm, Q
3And Q
4The brachium pontis of forming is a lagging leg.C
1～C
2Be respectively Q
1～Q
2External capacitor.High frequency transformer T
R1Elementary windings in series resonant inductance L
r, capacitance Cb, high frequency transformer T
R1Secondary winding through rectifier diode DR
1～DR
4Rectification, output inductor L
fFiltering inserts load Rf.High frequency transformer T
R1Secondary winding also be connected on two elementary windings of auxiliary transformer Tr2 the external adjustable resistance R of the secondary winding of auxiliary transformer Tr2.
The present invention is achieved through the following technical solutions:
A kind of auxiliary transformer circuit that is used for inverter light load zero voltage null current switch, this circuit is the circuit that is connected on the auxiliary transformer Tr2 composition of high frequency transformer Tr1 outlet side, realize the zero-voltage and zero-current switch condition of work under inverter light load or the Light Condition, reduce loss, keep the steady operation of system.
In said method, the full-bridge inverting phase-shifting resonance circuit of inverter is realized the resonance commutation in the device for power switching switching process, guarantee lower switching loss.And after the switching tube conducting, adopt the method provider's wave voltage and the electric current of PWM modulation.The auxiliary transformer circuit that this design is adopted makes full use of magnetization energy and has widened soft-switching range.
In said method, blocking capacitor device of the elementary series connection of high frequency transformer Tr1, two elementary windings of auxiliary transformer Tr2 are connected with two secondary winding of inverter high frequency transformer Tr1, introduce the circulation of certain value at resonant circuit, the external adjustable resistance R of the secondary winding of auxiliary transformer Tr2, the FERRITE CORE of auxiliary transformer Tr2 forms a closed magnetic circuit that contains air gap.Adjust the circulation value of introducing resonant circuit, help the steady operation of system.
In said method, the closed magnetic circuit that contains air gap of auxiliary transformer Tr2 is formed by two E type ferrite magnetic core butt joints.Two elementary windings place the upper and lower end parts of magnetic core respectively, and a secondary winding places the centre position.Two elementary windings are connected according to couple in phase with two secondary winding of inverter high frequency transformer Tr1, the adjustable resistance R of the external control circulation of the secondary winding of auxiliary transformer Tr2.
Claims (2)
1. auxiliary transformer circuit that is used for inverter light load zero voltage null current switch, it is characterized in that: comprise an auxiliary transformer (Tr2), and two elementary windings of described auxiliary transformer (Tr2) are connected with two secondary output windings of the high frequency transformer (Tr1) of inverter phase-shifting resonance circuit respectively, and the secondary winding of described auxiliary transformer (Tr2) connects an adjustable resistance (R).
2. auxiliary transformer circuit according to claim 1, wherein said auxiliary transformer (Tr2) is made up of two elementary windings, secondary winding and FERRITE CORE, two elementary windings of described auxiliary transformer (Tr2) are connected according to couple in phase with two secondary winding of high frequency transformer (Tr1) respectively, the secondary winding of described auxiliary transformer (Tr2) connects adjustable resistance (R), and the FERRITE CORE of described auxiliary transformer (Tr2) forms a closed magnetic circuit that contains air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610164339A CN101202160B (en) | 2006-12-11 | 2006-12-11 | Auxiliary transformer circuit for inverter light load zero voltage zero current switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610164339A CN101202160B (en) | 2006-12-11 | 2006-12-11 | Auxiliary transformer circuit for inverter light load zero voltage zero current switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101202160A CN101202160A (en) | 2008-06-18 |
| CN101202160B true CN101202160B (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610164339A Active CN101202160B (en) | 2006-12-11 | 2006-12-11 | Auxiliary transformer circuit for inverter light load zero voltage zero current switch |
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| Country | Link |
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| CN (1) | CN101202160B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783610B (en) * | 2009-12-17 | 2012-11-21 | 艾默生网络能源有限公司 | Passive soft switching inverter circuit |
| CN102412752B (en) * | 2011-12-08 | 2013-03-27 | 南通三九焊接机器制造有限公司 | Full-bridge resonant soft switching device |
| US8964432B2 (en) * | 2013-01-29 | 2015-02-24 | The Boeing Company | Apparatus and method for controlling circulating current in an inverter system |
| CN108667300B (en) * | 2017-05-17 | 2020-06-30 | 湖南工程学院 | Exciting inductance variable LLC resonance transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2476898Y (en) * | 2000-10-18 | 2002-02-13 | 深圳市中兴通讯股份有限公司 | All-bridge phase-shift zero-pressure zero-current device with improved structure |
| US6567285B2 (en) * | 2000-03-23 | 2003-05-20 | Tdk Corporation | Switching power supply unit |
| CN1132297C (en) * | 2000-01-24 | 2003-12-24 | 浙江大学 | DC/DC converter circuit with zero-current soft switch |
| CN201001088Y (en) * | 2006-12-11 | 2008-01-02 | 王金 | Auxiliary transformer circuit for fractional load zero voltage and null current switch of inverter |
-
2006
- 2006-12-11 CN CN200610164339A patent/CN101202160B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132297C (en) * | 2000-01-24 | 2003-12-24 | 浙江大学 | DC/DC converter circuit with zero-current soft switch |
| US6567285B2 (en) * | 2000-03-23 | 2003-05-20 | Tdk Corporation | Switching power supply unit |
| CN2476898Y (en) * | 2000-10-18 | 2002-02-13 | 深圳市中兴通讯股份有限公司 | All-bridge phase-shift zero-pressure zero-current device with improved structure |
| CN201001088Y (en) * | 2006-12-11 | 2008-01-02 | 王金 | Auxiliary transformer circuit for fractional load zero voltage and null current switch of inverter |
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| Publication number | Publication date |
|---|---|
| CN101202160A (en) | 2008-06-18 |
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Owner name: ZHENGZHOU DONGFANG ANCAI REFRACTORY CO., LTD. Free format text: FORMER OWNER: ZHENGZHOU ANCAI REFRACTORY CO., LTD. Effective date: 20101102 |
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Address after: 311232, No. five, No. 6, Hui Hui farm, Xiaoshan economic and Technological Development Zone, Hangzhou Patentee after: Wang Jin Address before: 311232 Xiaoshan economic and Technological Development Zone, Zhejiang, red road, No. 83, No. Patentee before: Wang Jin |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hangzhou Kaierda Electric Welding Machine Co., Ltd. Assignor: Wang Jin Contract record no.: 2011330000706 Denomination of invention: Auxiliary transformer circuit for inverter light load zero voltage null current switch Granted publication date: 20100519 License type: Exclusive License Open date: 20080618 Record date: 20110610 |
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Effective date of registration: 20200901 Address after: No.778 Changming Road, hongken farm, Xiaoshan Economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU KAIERDA ELECTRIC WELDING MACHINE Co.,Ltd. Address before: No.6, kenhui 5th Road, hongken farm, Xiaoshan Economic and Technological Development Zone, Hangzhou Patentee before: Wang Jin |
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