CN102412752A - Full-bridge resonant soft switching device - Google Patents
Full-bridge resonant soft switching device Download PDFInfo
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- CN102412752A CN102412752A CN2011104051386A CN201110405138A CN102412752A CN 102412752 A CN102412752 A CN 102412752A CN 2011104051386 A CN2011104051386 A CN 2011104051386A CN 201110405138 A CN201110405138 A CN 201110405138A CN 102412752 A CN102412752 A CN 102412752A
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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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Abstract
The invention discloses a full-bridge resonant soft switching device, which comprises a lead arm, a lag arm, a capacitor connected in parallel with the lead arm, and a capacitor connected in parallel with the lag arm, and the electronic components constitute a full-bridge resonant circuit, wherein the resonant circuit is connected with a primary stage of a main transformer T1 through a capacitor C5 and a saturated inductor Ls, and is output through a secondary stage of the main transformer T1; the primary stage or secondary stage or secondary auxiliary winding of the main transformer T1 is connected in parallel with a primary stage of an auxiliary transformer T2; and a secondary stage of the auxiliary transformer T2 is externally connected with a rectifier circuit D1 and is connected with a load. The full-bridge resonant soft switching device provided by the invention has reasonable structure; and during power inversion of the inverter, especially in light-load or no-load conditions, the power consumption of the circuit of the auxiliary transformer is small, and therefore circular current leading to the resonant circuit can be regulated, and in particular the circular current can be automatically compensated according to the magnitude of input supply voltage, thus the purpose of being beneficial to the stable operation of the system is served.
Description
Technical field
What the present invention relates to is the welding machine that is used to weld in a kind of industry, the adjustable auxiliary transformer circuit of circulation of soft switch when realization zero load that particularly a kind of inverter type welder is used and underloading.
Background technology
At present; The inverter arc welding soft switching power adopts the full-bridge phase-shifting resonance circuit more; But, when load is in underloading or Light Condition, can lose the switch condition of zero-voltage zero-current because the soft switch condition of lagging leg receives the influence of load variations; Increase switching loss, limited the soft switch working range of phase-shifting resonance circuit.For solving the switch problem of inverter at underloading or the zero-voltage zero-current when unloaded; Traditional technical method is: at blocking capacitor device of elementary series connection and pulsactor of high frequency transformer; Elementary or secondary parallelly connected change of current inductance at transformer; Or install the method for secondary auxiliary winding and change of current inductance additional at transformer secondary output, and in resonant circuit, introduce a constant exciting curent, realize the switch condition of zero-voltage zero-current.
But, parallelly connected change of current inductance, the power consumption when inverter is in underloading or Light Condition is very big, the value of the exciting curent of the resonant circuit of introducing changes along with the size of input voltage, and is difficult for adjustment, is unfavorable for the steady operation of inverter.
Summary of the invention
The object of the present invention is to provide a kind of rational in infrastructurely, underloading realizes the adjustable full-bridge resonant type soft-switch device of circulation of soft switch when unloaded.
Technical solution of the present invention is:
A kind of full-bridge resonant type soft-switch device; It is characterized in that: comprise the leading arm that constitutes by transistor Q1, Q2; The lagging leg that constitutes by transistor Q3, Q4; The leading arm shunt capacitance that capacitor C 3, C4 constitute, capacitor C 3, C4 constitute the lagging leg shunt capacitance, constitute the full-bridge resonant circuit by above-mentioned electronic component; Said resonant circuit is connected with the elementary of main transformer T1 through capacitor C 5, pulsactor Ls; Secondary output through main transformer T1; On the elementary secondary or secondary auxiliary winding of main transformer T1, be parallel with the elementary of auxiliary transformer T2; The secondary external rectification circuit D1 of auxiliary transformer T2, and connect load.
Said auxiliary transformer T2 secondary is an independent winding or is made up of two windings in series.
Said load is connected to the direct current supply input and the adjustable resistance R1 of inverter.
The present invention is rational in infrastructure; In the power conversion process of inverter; Particularly under underloading or the Light Condition, the power consumption of auxiliary transformer circuit is little, can adjust the circulation of introducing resonant circuit; Particularly can circulation be compensated automatically, reach the purpose of the steady operation that helps system according to the size of input supply voltage.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 be the embodiment of the invention 1 circuit diagram.
Fig. 2 is the circuit diagram of embodiment 2.
Fig. 3 is the circuit diagram of embodiment 3.
Fig. 4 is the partial circuit diagram of embodiment 4.
Embodiment
Embodiment 1:
A kind of full-bridge resonant type soft-switch device; Comprise the leading arm that constitutes by transistor Q1, Q2, by the lagging leg that transistor Q3, Q4 constitute, the leading arm shunt capacitance that capacitor C 3, C4 constitute; Capacitor C 3, C4 constitute the lagging leg shunt capacitance, constitute the full-bridge resonant circuit by above-mentioned electronic component; Said resonant circuit is connected with the elementary of main transformer T1 through capacitor C 5, pulsactor Ls; Secondary output through main transformer T1; On main transformer T1 elementary, be parallel with the elementary of auxiliary transformer T2, the secondary external rectification circuit D1 of auxiliary transformer T2, and connect load.
The secondary of said auxiliary transformer T2 is an independent winding.
Said load is connected to the direct current supply input and the adjustable resistance R1 of inverter.
Embodiment 2:
Auxiliary transformer T2 elementary is connected in parallel on main transformer T1 secondary, and all the other are with embodiment 1.
Embodiment 3:
Auxiliary transformer T2 elementary is connected in parallel on the secondary auxiliary winding of main transformer T1, and all the other are with embodiment 1.
Embodiment 4:
The secondary of auxiliary transformer T2 is made up of two windings in series.All the other are basically with embodiment 1.
Claims (3)
1. full-bridge resonant type soft-switch device; It is characterized in that: comprise the leading arm that constitutes by transistor Q1, Q2; The lagging leg that constitutes by transistor Q3, Q4; The leading arm shunt capacitance that capacitor C 3, C4 constitute, capacitor C 3, C4 constitute the lagging leg shunt capacitance, constitute the full-bridge resonant circuit by above-mentioned electronic component; Said resonant circuit is connected with the elementary of main transformer T1 through capacitor C 5, pulsactor Ls; Secondary output through main transformer T1; On the elementary secondary or secondary auxiliary winding of main transformer T1, be parallel with the elementary of auxiliary transformer T2; The secondary external rectification circuit D1 of auxiliary transformer T2, and connect load.
2. full-bridge resonant type soft-switch device according to claim 1 is characterized in that: said auxiliary transformer T2 secondary is an independent winding or is made up of two windings in series.
3. full-bridge resonant type soft-switch device according to claim 1 and 2 is characterized in that: said load is connected to the direct current supply input and the adjustable resistance R1 of inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104051386A CN102412752B (en) | 2011-12-08 | 2011-12-08 | Full-bridge resonant soft switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104051386A CN102412752B (en) | 2011-12-08 | 2011-12-08 | Full-bridge resonant soft switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102412752A true CN102412752A (en) | 2012-04-11 |
| CN102412752B CN102412752B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104051386A Expired - Fee Related CN102412752B (en) | 2011-12-08 | 2011-12-08 | Full-bridge resonant soft switching device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102412752B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647883A (en) * | 2004-12-06 | 2005-08-03 | 陈仁富 | Device for realizing soft switching while welder no-load and light load for inverse welder |
| CN101202160A (en) * | 2006-12-11 | 2008-06-18 | 王金 | Auxiliary transformer circuit for inverter light load zero voltage null current switch |
| CN101931316A (en) * | 2009-06-22 | 2010-12-29 | 力博特公司 | LLC (Liquid Level Control) topology and current limiting circuit thereof |
| CN202395678U (en) * | 2011-12-08 | 2012-08-22 | 南通三九焊接机器制造有限公司 | Full-bridge resonant soft switching device |
-
2011
- 2011-12-08 CN CN2011104051386A patent/CN102412752B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647883A (en) * | 2004-12-06 | 2005-08-03 | 陈仁富 | Device for realizing soft switching while welder no-load and light load for inverse welder |
| CN101202160A (en) * | 2006-12-11 | 2008-06-18 | 王金 | Auxiliary transformer circuit for inverter light load zero voltage null current switch |
| CN101931316A (en) * | 2009-06-22 | 2010-12-29 | 力博特公司 | LLC (Liquid Level Control) topology and current limiting circuit thereof |
| CN202395678U (en) * | 2011-12-08 | 2012-08-22 | 南通三九焊接机器制造有限公司 | Full-bridge resonant soft switching device |
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| CN102412752B (en) | 2013-03-27 |
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Granted publication date: 20130327 Termination date: 20131208 |