CN100398245C - Two times inversion main loop of argon welder with variable polarity - Google Patents
Two times inversion main loop of argon welder with variable polarity Download PDFInfo
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- CN100398245C CN100398245C CNB2005100436806A CN200510043680A CN100398245C CN 100398245 C CN100398245 C CN 100398245C CN B2005100436806 A CNB2005100436806 A CN B2005100436806A CN 200510043680 A CN200510043680 A CN 200510043680A CN 100398245 C CN100398245 C CN 100398245C
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Abstract
The present invention provides a secondary inversion main circuit of an argon arc welder with variable polarity, which comprises a half-bridge inverter circuit, a high voltage precharge circuit and a commutation circuit, wherein high voltage is provided for the half-bridge inverter circuit by the high voltage precharge circuit. When the current of the half-bridge inverter circuit is reversed, the commutation circuit provides an afterflow circuit. The present invention is characterized in that because the high voltage precharge circuit and the commutation circuit are added on the basis of the half-bridge inverter circuit, the voltage is high due to a precharge process so as to generate a rapid current zero-crossing speed. In addition, an arc can not be easily broken. Both high currents and low currents can maintain arc stability. In the whole process of inversion and commutation, no power dissipation devices, such as a resistor, etc., are used. Therefore, loss is low.
Description
(1) technical field:
The present invention relates to a kind of industrial Variable Polarity argon arc welding machine that is used to weld, especially wherein secondary inverter main circuit.
(2) background technology:
What in the prior art, known contravariant Variable Polarity argon arc welding machine major loop adopted is two inverter structure.In the secondary inversion circuit,, adopt the topological form of series inductance on inverter bridge leg or the topological form of employing RCD network in order to improve the speed of zero crossing.In above-mentioned first kind of topological form, the speed of current over-zero is slower, easily current interruption, little electric current instability.In above-mentioned second kind of topological form, resistance consumption power is bigger, especially when change of current electric current bigger, when operating frequency was higher, power consumption reached more than 1000 watts.
(3) summary of the invention:
The present invention is directed to the deficiencies in the prior art, fast, the little arc current good stability of a kind of change of current speed, Variable Polarity argon arc welding machine two times inversion main loop low in energy consumption are provided.
The solution that the present invention adopts is:
This Variable Polarity argon arc welding machine two times inversion main loop comprises half-bridge inversion circuit, high pressure precharge loop and commutation circuit, and high pressure precharge loop provides high voltage to half-bridge inversion circuit, and commutating circuit provides the afterflow path when the half-bridge inversion circuit electric current commutates.
Half-bridge inversion circuit is made up of two high-power insulated gate bipolar transistors, filter capacitor and absorption electric capacity, a transistorized source electrode connects another transistor drain, two transistorized two ends all are parallel with absorption electric capacity, filter capacitor one end links to each other with a transistor drain, and the other end links to each other with another transistorized source electrode.
High pressure precharge loop is made of two fast recovery diodes, inductance, secondary auxiliary winding, the centre tap of secondary auxiliary winding connects an end of inductance, a transistor source class in another termination half-bridge inversion circuit of inductance, the positive pole of two fast recovery diodes of other two terminations of secondary auxiliary winding, the negative pole of two fast recovery diodes connects transistor drain in the half-bridge inversion circuit.Secondary auxiliary winding is to twine the 7-30 circle with lead on high frequency transformer to form.Inductance is to twine the 10-30 circle to form on magnetic core.
Commutation circuit is made up of two electric capacity and inductance, two capacitance series to secondary bus, an end of the public termination inductance of two electric capacity, the inductance other end is received on the centre tap of secondary windings.Inductance is to twine the 9-30 circle with lead to form on U type ferrite iron core, and the concrete number of turn is decided according to the size of load output current.
The present invention is owing to increased high pressure precharge loop and commutation circuit on the basis of half-bridge inversion circuit, because pre-charge process is arranged, voltage is higher, thereby the speed of generation current over-zero is very fast, and is difficult for current interruption, and big or small electric current can both keep arc stability.In whole inversion and commutation process, there are not power consumption device participations such as resistance, so loss is low.
(4) description of drawings:
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the circuit theory diagrams of first kind of variations in mesohigh precharge of the present invention loop.
Fig. 3 is the circuit theory diagrams of second kind of variations in mesohigh precharge of the present invention loop.
Fig. 4 is the circuit theory diagrams of the third variations in mesohigh precharge of the present invention loop.
Among the figure: 1, half-bridge inversion circuit, 2, high pressure precharge loop, 3, commutation circuit
(5) specific embodiment:
Fig. 1 has provided circuit theory diagrams of the present invention.Variable Polarity argon arc welding machine two times inversion main loop comprises three parts: half-bridge inversion circuit 1, high pressure pre-charge circuit 2 and commutation circuit 3.The present invention has increased high pressure precharge loop 2 and commutation circuit 3 in the half-bridge inversion circuit 1 of secondary inversion, precharge loop 2 provides high voltage for inverter circuit 1, guarantees that output current is difficult for current interruption when zero passage, and big or small electric current can both keep arc stability; 3 of commutating circuits provide the afterflow path when inverter circuit 1 electric current commutates, guarantee that output current commutates with fast speeds.Half-bridge inversion circuit 1 is made up of high-power insulated gate bipolar transistor Q1 and Q2, filter capacitor C5, absorption capacitor C 1 and C2, the source electrode of Q1 connects the drain electrode of Q2, the Q1 two ends are parallel with and absorb capacitor C 1, the Q2 two ends are parallel with and absorb capacitor C 2, filter capacitor C5 one end links to each other with the Q1 drain electrode, and the other end links to each other with the source electrode of Q2.High pressure pre-charge circuit 2 is made of fast recovery diode D7 and D8, inductance L 3, secondary auxiliary winding N2, the positive pole of diode D7 connects a end of winding N2, the positive pole of diode D8 connects the c end of winding N2, after being connected together, the negative pole of diode D7 and D8 is connected with the drain electrode of Q1, the b end of the auxiliary winding N2 of one terminates secondary of inductance L 3, the source electrode of another termination Q2, secondary auxiliary winding N2 is the secondary auxiliary winding of high frequency transformer T, be to twine the 7-30 circle with lead on high frequency transformer T to form, inductance L 3 is to twine the 10-30 circle to form on ferrocart core or other magnetic core.Fig. 2, Fig. 3, Fig. 4 have provided three kinds of variations of high pressure pre-charge circuit, all belong to protection scope of the present invention.Commutation circuit 3 is made up of capacitor C 3 and C4, inductance L 1, capacitor C 3 and C4 receive on the secondary bus, one of capacitor C 3 terminates at the drain electrode of Q1, the other end is connected with capacitor C 4 one ends, the source electrode of another termination Q2 of C4, one termination C3 of inductance L 1 and the common port of C4, the centre tap of another termination output inductor L2 and high frequency transformer secondary windings N1, inductance L 1 is to twine the 9-30 circle with lead to form on U type ferrite iron core.
Claims (4)
1. Variable Polarity argon arc welding machine two times inversion main loop, comprise half-bridge inversion circuit, high pressure precharge loop and commutation circuit, high pressure precharge loop provides high voltage to half-bridge inversion circuit, and commutating circuit provides the afterflow path when the half-bridge inversion circuit electric current commutates; It is characterized in that: described half-bridge inversion circuit is made up of two high-power insulated gate bipolar transistors, filter capacitor and absorption electric capacity, a transistorized source electrode connects another transistor drain, two transistorized two ends all are parallel with absorption electric capacity, filter capacitor one end links to each other with a transistor drain, and the other end links to each other with another transistorized source electrode; Described high pressure precharge loop is made of two fast recovery diodes, inductance, secondary auxiliary winding, the centre tap of secondary auxiliary winding connects an end of inductance, a transistor source class in another termination half-bridge inversion circuit of inductance, the positive pole of two fast recovery diodes of other two terminations of secondary auxiliary winding, the negative pole of two fast recovery diodes connects transistor drain in the half-bridge inversion circuit; Described commutation circuit is made up of two electric capacity and inductance, two capacitance series to secondary bus, an end of the public termination inductance of two electric capacity, the inductance other end is received on the centre tap of secondary windings.
2. Variable Polarity argon arc welding machine two times inversion main loop according to claim 1 is characterized in that: secondary auxiliary winding is to twine the 7-30 circle with lead on high frequency transformer to form in the described high pressure precharge loop.
3. Variable Polarity argon arc welding machine two times inversion main loop according to claim 1 is characterized in that: inductance is to twine the 10-30 circle to form on magnetic core in the described high pressure precharge loop.
4. Variable Polarity argon arc welding machine two times inversion main loop according to claim 1 is characterized in that: inductance is to twine the 9-30 circle with lead to form on U type ferrite iron core in the described commutation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100436806A CN100398245C (en) | 2005-05-30 | 2005-05-30 | Two times inversion main loop of argon welder with variable polarity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100436806A CN100398245C (en) | 2005-05-30 | 2005-05-30 | Two times inversion main loop of argon welder with variable polarity |
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| Publication Number | Publication Date |
|---|---|
| CN1695867A CN1695867A (en) | 2005-11-16 |
| CN100398245C true CN100398245C (en) | 2008-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100436806A Active CN100398245C (en) | 2005-05-30 | 2005-05-30 | Two times inversion main loop of argon welder with variable polarity |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107570840B (en) * | 2017-10-09 | 2019-06-14 | 上海沪工焊接集团股份有限公司 | Beam controlling system suitable for alternating-current argon arc welder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1190628A (en) * | 1997-09-20 | 1999-04-06 | Matsushita Electric Ind Co Ltd | Control method for polarity changeover and consumable electrode type arc welding machine |
| CN2477311Y (en) * | 2001-03-29 | 2002-02-20 | 李恩涛 | Arc striking and stabilizing device of arc-welding set |
| US20040206736A1 (en) * | 2003-02-20 | 2004-10-21 | Kabushiki Kaisha Yaskawa Denki | Arc welder |
| CN2829960Y (en) * | 2005-05-30 | 2006-10-25 | 陈仁富 | Secondary inversion main loop of polarization variable argon welder |
-
2005
- 2005-05-30 CN CNB2005100436806A patent/CN100398245C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1190628A (en) * | 1997-09-20 | 1999-04-06 | Matsushita Electric Ind Co Ltd | Control method for polarity changeover and consumable electrode type arc welding machine |
| CN2477311Y (en) * | 2001-03-29 | 2002-02-20 | 李恩涛 | Arc striking and stabilizing device of arc-welding set |
| US20040206736A1 (en) * | 2003-02-20 | 2004-10-21 | Kabushiki Kaisha Yaskawa Denki | Arc welder |
| CN2829960Y (en) * | 2005-05-30 | 2006-10-25 | 陈仁富 | Secondary inversion main loop of polarization variable argon welder |
Non-Patent Citations (2)
| Title |
|---|
| 变极性TIG焊电源稳弧特性的研究. 李春旭，陈克选，郝礼杰.甘肃科学学报，第14卷第4期. 2002 |
| 变极性TIG焊电源稳弧特性的研究. 李春旭，陈克选，郝礼杰.甘肃科学学报，第14卷第4期. 2002 * |
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| CN1695867A (en) | 2005-11-16 |
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Owner name: SHANDONG SDU AOTAI ELECTRIC CO., LTD. Free format text: FORMER OWNER: CHEN RENFU Effective date: 20090417 |
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Effective date of registration: 20090417 Address after: Great science and Technology Park, Ying Lu Road, hi tech Development Zone, Ji'nan, Shandong Patentee after: Shandong Sdu Aotai Electric Co., Ltd. Address before: Shandong city of Ji'nan province Ying Xiu Lu Mountain high tech Zone Technology Park Hill electrical Austria too Patentee before: Chen Renfu |