CN105391318A - Direct current support capacitor discharge method for intermediate-frequency inverter type resistance welding machine - Google Patents
Direct current support capacitor discharge method for intermediate-frequency inverter type resistance welding machine Download PDFInfo
- Publication number
- CN105391318A CN105391318A CN201510923086.XA CN201510923086A CN105391318A CN 105391318 A CN105391318 A CN 105391318A CN 201510923086 A CN201510923086 A CN 201510923086A CN 105391318 A CN105391318 A CN 105391318A
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- China
- Prior art keywords
- direct current
- circuit
- switching tube
- capacitance group
- welding machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/26—Storage discharge welding
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
Abstract
The invention provides a direct current support capacitor discharge method for an intermediate-frequency inverter type resistance welding machine. The method comprises the following steps: (1) firstly, rectifying three-phase alternating current through a three-phase half-controlled bridge rectifier circuit to obtain pulsating direct current with a voltage peak of 540, and loading the pulsating direct current to positive and negative terminals of a high-capacity capacitor bank which is connected in parallel; (2) connecting the direct current generated by the rectifier circuit to an input end of a direct current converting circuit through the direct current converting circuit with a wide input, and generating direct current 24V voltage required by a system; and (3) on one hand, connecting 24V direct current generated by the direct current converting circuit to a control system to meet the working requirements of the system, on the other hand, connecting the 24V direct current to a fan for radiating the capacitor bank, so as to reach the target of radiating the capacitor bank. By the converting circuit, power supply of the entire system can be achieved; and the energy stored in direct current support capacitors can also be automatically discharged after the system is powered off.
Description
Technical field
The invention belongs to circuit design field, especially relate to a kind of medium-frequency inverting resistance welding machine DC support capacitive discharge method.
Background technology
For improving the fail safe of body of a motor car, a large amount of high-strength steel and galvanized sheet are applied in body of a motor car manufacture, and the reliable welding of these materials proposes new challenge to spot welding controller.And medium frequency inverted resistance welding machine exactly can meet the welding requirements of these materials, be thus day by day widely used.
But there is jumbo electric capacity in medium-frequency inverting resistance welding machine controller, after system closedown, in electric capacity, also can store huge energy, if these energy do not discharge, great personal injury can be caused, even threat to life in personnel's service equipment process.Therefore need the energy in large bulk capacitance to be discharged by a kind of means reliably after system closedown.
At present, conventional method for releasing be at capacitance terminal parallel connection high-power resistance or bulb constant power element, manually button press thus reach the exergonic object stored in electric capacity.Mainly there is following shortcoming in this method:
The first, the velocity of discharge is slow, if discharge resistance cooling is not fully easily burnt;
The second, poor reliability, if having people by mistake by discharge button, then entail dangers to equipment and personal safety in system operation;
3rd, waste energy, energy stored in electric capacity is wasted, and is not used effectively.
Therefore, designing a kind of completely newly, reliable medium-frequency inverting resistance welding machine DC support capacitive discharge method, is the problem that these those skilled in the art should address.
Summary of the invention
In view of this, the present invention is intended to propose a kind of quick, safe medium-frequency inverting resistance welding machine DC support capacitive discharge method, improves the reliability of system discharge.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of medium-frequency inverting resistance welding machine DC support capacitive discharge method, its step is as follows:
1) first three-phase alternating current is obtained the Rectified alternating current that voltage peak is 540 after three-phase half-controlled bridge-type rectifier circuit rectifies, and be carried in the large bulk capacitance group positive and negative terminal be connected in parallel;
2) by DC transfer circuit that a kind of wide cut inputs, the input of the direct current access DC transfer circuit that above-mentioned rectification circuit is produced, described DC transfer circuit comprises switching tube, transformer, diode rectifier circuit, filter circuit, PWM controller and driving transformer, the input of described switching tube is connected with the output of described rectification circuit, the output of described switching tube is successively by described transformer, diode rectifier circuit, output dc voltage after filter circuit, the output of described filter circuit is also by described PWM controller, be connected with the input of switching tube after driving transformer, opening and turning off the ratio controlling output voltage and input voltage by switching tube, the high-frequency electrical that switching tube produces passes through transformer pressure-reducing, high-frequency alternating current required for generation system, pass through rectification again, filtering, direct current 24V voltage required for generation system,
3) 24V direct current DC transfer circuit produced is access control system on the one hand, meets the need of work of system itself; On the other hand, by this 24V direct current access capacitance group radiating fan, to reach the object of capacitance group heat radiation.When after controller power-off, control system and capacitance group radiator fan carry out work by energy stored in capacitance group, until the depleted of energy in capacitance group, by this kind of method, the reliable of its DC support capacitance group after medium-frequency inverting resistance welding machine power-off can be realized, repid discharge, meanwhile, the Appropriate application of the energy of realization.
Further, the wide cut input range of described DC transfer circuit is 100V-700V.
Relative to prior art, medium-frequency inverting resistance welding machine DC support capacitive discharge method of the present invention has following advantage:
1) repid discharge of medium-frequency inverting resistance welding machine DC support electric capacity can be realized.
2) improve the reliability of system discharge, the automatic discharging of DC support electric capacity after power-off can be realized.
3) power supply of whole system can be realized, after system cut-off, automatically can bleed off again energy stored in DC support electric capacity.
4) by the power supply of the energy of electric capacity with system radiating fan, the Appropriate application of the energy is realized.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the circuit diagram of rectification circuit in the present invention;
Fig. 3 is the theory diagram of DC transfer circuit in the present invention;
Fig. 4 is the theory diagram of direct-current discharge circuit in the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figures 1 to 4, a kind of medium-frequency inverting resistance welding machine DC support capacitive discharge method, its step is as follows:
1) first three-phase alternating current is obtained the Rectified alternating current that voltage peak is 540 after three-phase half-controlled bridge-type rectifier circuit rectifies, and be carried in the large bulk capacitance group positive and negative terminal be connected in parallel;
2) by (input range 100V-700V) DC transfer circuit that a kind of wide cut inputs, the input of the direct current access DC transfer circuit that above-mentioned rectification circuit is produced, described DC transfer circuit comprises switching tube, transformer, diode rectifier circuit, filter circuit, PWM controller and driving transformer, the input of described switching tube is connected with the output of described rectification circuit, the output of described switching tube is successively by described transformer, diode rectifier circuit, output dc voltage after filter circuit, the output of described filter circuit is also by described PWM controller, be connected with the input of switching tube after driving transformer, opening and turning off the ratio controlling output voltage and input voltage by switching tube, the high-frequency electrical that switching tube produces passes through transformer pressure-reducing, high-frequency alternating current required for generation system, pass through rectification again, filtering, direct current 24V voltage required for generation system,
3) 24V direct current DC transfer circuit produced is access control system on the one hand, meets the need of work of system itself; On the other hand, by this 24V direct current access capacitance group radiating fan, to reach the object of capacitance group heat radiation.When after controller power-off, control system and capacitance group radiator fan carry out work by energy stored in capacitance group, until the depleted of energy in capacitance group, by this kind of method, the reliable of its DC support capacitance group after medium-frequency inverting resistance welding machine power-off can be realized, repid discharge, meanwhile, the Appropriate application of the energy of realization.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a medium-frequency inverting resistance welding machine DC support capacitive discharge method, is characterized in that: its step is as follows:
1) first three-phase alternating current is obtained the Rectified alternating current that voltage peak is 540 after three-phase half-controlled bridge-type rectifier circuit rectifies, and be carried in the large bulk capacitance group positive and negative terminal be connected in parallel;
2) by DC transfer circuit that a kind of wide cut inputs, the input of the direct current access DC transfer circuit that above-mentioned rectification circuit is produced, described DC transfer circuit comprises switching tube, transformer, diode rectifier circuit, filter circuit, PWM controller and driving transformer, the input of described switching tube is connected with the output of described rectification circuit, the output of described switching tube is successively by described transformer, diode rectifier circuit, output dc voltage after filter circuit, the output of described filter circuit is also by described PWM controller, be connected with the input of switching tube after driving transformer, opening and turning off the ratio controlling output voltage and input voltage by switching tube, the high-frequency electrical that switching tube produces passes through transformer pressure-reducing, high-frequency alternating current required for generation system, pass through rectification again, filtering, direct current 24V voltage required for generation system,
3) 24V direct current DC transfer circuit produced is access control system on the one hand, meets the need of work of system itself; On the other hand, by this 24V direct current access capacitance group radiating fan, to reach the object of capacitance group heat radiation, when after controller power-off, control system and capacitance group radiator fan carry out work, until the depleted of energy in capacitance group by energy stored in capacitance group.
2. a kind of medium-frequency inverting resistance welding machine DC support capacitive discharge method according to claim 1, is characterized in that: the wide cut input range of described DC transfer circuit is 100V-700V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510923086.XA CN105391318A (en) | 2015-12-10 | 2015-12-10 | Direct current support capacitor discharge method for intermediate-frequency inverter type resistance welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510923086.XA CN105391318A (en) | 2015-12-10 | 2015-12-10 | Direct current support capacitor discharge method for intermediate-frequency inverter type resistance welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105391318A true CN105391318A (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510923086.XA Pending CN105391318A (en) | 2015-12-10 | 2015-12-10 | Direct current support capacitor discharge method for intermediate-frequency inverter type resistance welding machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201063545Y (en) * | 2007-04-10 | 2008-05-21 | 杨冬 | Single-phase, three-phase voltage dual-purpose high-frequency inversion electric welder |
| CN201900364U (en) * | 2010-12-02 | 2011-07-20 | 浙江肯得机电股份有限公司 | Circuit of inversion shielded ace welding machine of single-tube IGBT (insulated gate bipolar transistor) and circuit board structure of circuit |
| CN202271084U (en) * | 2011-08-31 | 2012-06-13 | 浙江友力电机泵业有限公司 | Power supply circuit of inverter welding machine |
| CN203655678U (en) * | 2013-11-27 | 2014-06-18 | 美的集团股份有限公司 | Fan speed regulating circuit, cooling device and household electric appliance |
| CN204068320U (en) * | 2014-07-10 | 2014-12-31 | 福建省福工动力技术有限公司 | The electric discharge device of super capacitor |
-
2015
- 2015-12-10 CN CN201510923086.XA patent/CN105391318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201063545Y (en) * | 2007-04-10 | 2008-05-21 | 杨冬 | Single-phase, three-phase voltage dual-purpose high-frequency inversion electric welder |
| CN201900364U (en) * | 2010-12-02 | 2011-07-20 | 浙江肯得机电股份有限公司 | Circuit of inversion shielded ace welding machine of single-tube IGBT (insulated gate bipolar transistor) and circuit board structure of circuit |
| CN202271084U (en) * | 2011-08-31 | 2012-06-13 | 浙江友力电机泵业有限公司 | Power supply circuit of inverter welding machine |
| CN203655678U (en) * | 2013-11-27 | 2014-06-18 | 美的集团股份有限公司 | Fan speed regulating circuit, cooling device and household electric appliance |
| CN204068320U (en) * | 2014-07-10 | 2014-12-31 | 福建省福工动力技术有限公司 | The electric discharge device of super capacitor |
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Application publication date: 20160309 |
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