CN201656791U - Inverter plasma spraying power source - Google Patents
Inverter plasma spraying power source Download PDFInfo
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- CN201656791U CN201656791U CN2010201818819U CN201020181881U CN201656791U CN 201656791 U CN201656791 U CN 201656791U CN 2010201818819 U CN2010201818819 U CN 2010201818819U CN 201020181881 U CN201020181881 U CN 201020181881U CN 201656791 U CN201656791 U CN 201656791U
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Abstract
The utility model relates to the field of surface engineering spraying, in particular to an inverter plasma spraying power source, which comprises a primary rectifying filter circuit, an IGBT full-bridge inverter circuit, a high-frequency transformer, a secondary rectifying filter circuit, an IGBT driving circuit, an output circuit setting circuit, a PWM control circuit, an external characteristic control circuit, a high-frequency arc striking circuit, a current control and protection circuit and a synchronous current-sharing control circuit, and each single group of circuits is connected in parallel via inverter circuits. The plasma spraying power source which adopts thermal spraying is small in volume, light in weight, high in efficiency and more stable in output, and can reduce manufacturing cost and service cost.
Description
Technical field
The utility model relates to the Surface Engineering field of thermal spray, relates in particular to a kind of thermal spraying plasma spraying power supply.
Technical background
It may be the most flexibly that plasma spray is coated in all hot-spraying techniques, sprays various potteries, metal and alloy thereof and the same ceramic composite powder of various metal etc. because it can reach enough energy.Because it uses powder as the coating feeding, the coating material kind that plasma spray coating process can use almost is unlimited.Plasma torch has a negative electrode (electrode) and an anode (nozzle), and slight gap between the two forms a chamber.Logical direct current on negative electrode, arc-through arrives anode.Simultaneously, gas is also by this chamber.Powerful electric arc is enough to the electronics of gas is seized, and forms the state of matter that is known as plasma.When plasma can release heat when gaseous state is got back in combination again.Because the ion in the unsteadiness of the inherence of plasma, plasma plume can recombine into gaseous state rapidly and cool down.At binding site again, temperature can reach 6600 ℃ to 16600 ℃ (12000 °F to 30000 °F), and such temperature has surpassed the temperature on sun surface.When coating material sprays in the air inlet body feathers stream, understand fusion and be pushed to target substrate.
At present, the plasma spraying power supply mainly adopts large-scale Industrial Frequency Transformer, and the rectification output DC is typical constant-current source, has the voltage steep drop characteristic.Owing to be operated in 50 hertz, the lifting of voltage is to reach by the mode that increases transformation machine umber of turn, causes that its power volume is big, weight is heavier, power-efficient is lower, and response speed is slower, and the output dynamic characteristic is relatively poor.
Summary of the invention
The utility model technical issues that need to address have provided a kind of new method that realizes the plasma spraying power supply, make it that volume is little, in light weight, efficient is high, output is more stable, and can reduce the manufacturing cost and the use cost of plasma spraying power supply.
In order to solve the problems of the technologies described above, the utility model adopts following method:
A kind of contravariant plasma spraying power supply; comprise current rectifying and wave filtering circuit, IGBT full bridge inverter, high frequency transformer, secondary current rectifying and wave filtering circuit, IGBT drive circuit, output current initialization circuit, pwm control circuit, external characteristic control circuit, high-frequency arc ignition circuit, Current Control and a protective circuit, equalizing control circuit synchronously, single group circuit adopts inverter circuit to compose in parallel.
Above-mentioned inverter circuit is that three-phase main-frequency 380V alternating current is transformed into direct current about 540V through rectifying and wave-filtering, form full-bridge inverter by IGBT above-mentioned direct current is carried out inversion once more, it is transformed into the high frequency square wave alternating current, the high frequency square wave alternating current is passed to the secondary of transformer again through high frequency transformer, the full-wave rectifying circuit that is connected the high frequency transformer secondary is a direct current with the rectification of high frequency square wave alternating current secondary once more, and then becomes the direct current output of stable and controllable behind inductor filter.
Above-mentioned contravariant plasma spraying power supply is to adopt 4 groups of inverters to compose in parallel, and adopts flow equalizing circuit, and closed-loop control makes every group of electric power outputting current basically identical.Behind the output current that configures the plasma spraying power supply, the master board meeting on average is assigned to electric current master board and other three control boards automatically according to set point.Like this, after starting power supply output, four groups of DC power supply all will be carried out independently current closed-loop control according to the current value that distributes separately, thereby guarantee that well four groups of DC power supply output currents equate.
Above-mentioned IGBT full bridge inverter exchanges the high frequency square wave that direct current carries out forming about 20kHz after the inversion once more.
High frequency of the present utility model opens the arc system, by being wrapped in the winding of high frequency transformer secondary, can obtain the high-frequency signal of 20kHz, and then boost through step-up transformer B, can obtain the striking signal of high-frequency and high-voltage (the about 3000V of voltage).This signal can be coupled to spray gun by instrument transformer.In the moment of the starting the arc, the high-frequency arc strike control circuit is connected arc ignition circuit, makes high-voltage signal be coupled to spray gun by instrument transformer.The striking signal of high-frequency and high-voltage punctures the gas in negative electrode and anode (being electrode and the nozzle) gap, can the smooth starting the arc.
Description of drawings
Fig. 1 the utility model contravariant plasma spraying power supply block diagram.
Fig. 2 the utility model contravariant plasma spraying power supply list group circuit theory diagrams.
Embodiment
With concrete enforcement the utility model is further elaborated below, but embodiment only is used for explanation, does not limit scope of invention.
As shown in Figure 1, the utility model contravariant plasma spraying power supply block diagram.Comprise following part: 1. current rectifying and wave filtering circuit.2.IGBT full bridge inverter.3. high frequency transformer.4. secondary current rectifying and wave filtering circuit.5.IGBT drive circuit.6. output current initialization circuit.7.PWM control circuit.8. external characteristic is controlled (protection) circuit.9. high-frequency arc ignition circuit.10. Current Control and protective circuit.11. synchronous equalizing control circuit.Single group circuit adopts closed-loop control, and whole system, utilizes flow equalizing circuit that 4 groups of output currents are equated again, and forms closed loop at whole system to obtain than High Output Current by 4 groups of inverter circuit parallel connections.
Above-mentioned inverter circuit is that three-phase main-frequency 380V alternating current is transformed into direct current about 540V through rectifying and wave-filtering, form full-bridge inverter by IGBT above-mentioned direct current is carried out inversion once more, it is transformed into the high frequency square wave alternating current, the high frequency square wave alternating current is passed to the secondary of transformer again through high frequency transformer, the full-wave rectifying circuit that is connected the high frequency transformer secondary is a direct current with the rectification of high frequency square wave alternating current secondary once more, and then becomes the direct current output of stable and controllable behind inductor filter.
Above-mentioned contravariant plasma spraying power supply is to adopt 4 groups of inverters to compose in parallel, and adopts flow equalizing circuit, and closed-loop control makes every group of electric power outputting current basically identical.Behind the output current that configures the plasma spraying power supply, the master board meeting on average is assigned to electric current master board and other three control boards automatically according to set point.Like this, after starting power supply output, four groups of DC power supply all will be carried out independently current closed-loop control according to the current value that distributes separately, thereby guarantee that well four groups of DC power supply output currents equate.
Above-mentioned IGBT full bridge inverter exchanges the high frequency square wave that direct current carries out forming about 20kHz after the inversion once more.
Above-mentioned high frequency opens the arc system, by being wrapped in the winding of high frequency transformer secondary, can obtain the high-frequency signal of 20kHz, and then boost through step-up transformer B, can obtain the striking signal of high-frequency and high-voltage (the about 3000V of voltage).This signal can be coupled to spray gun by instrument transformer.In the moment of the starting the arc, the high-frequency arc strike control circuit is connected arc ignition circuit, makes high-voltage signal be coupled to spray gun by instrument transformer.The striking signal of high-frequency and high-voltage punctures the gas in negative electrode and anode (being electrode and the nozzle) gap, can the smooth starting the arc.
Wherein, high frequency transformer adopts ultracrystallite making unshakable in one's determination, frequency of utilization＞20kHz.
Wherein, the production M57962L of IGBT drive circuit employing Mitsubishi is a driving element.
Wherein, it is its main element that pwm control circuit adopts fixed SG3525A frequently, controls by voltage mode.
Wherein, fast quick-recovery two utmost points, its resume speed is delicate less than＜50.
As shown in Figure 2, the utility model contravariant plasma spraying power supply list group circuit theory diagrams.Principle is: the 380V alternating current of input is through after the full-bridge rectification, carry out filtering by 1 pair of pulsating direct current of capacitor C, obtain direct current stably, high voltage direct current is carried out full-bridge inverting through IGBT (T1, T2, T3, T4) then, again by capacitance C2 coupling, high frequency transformer B step-down, obtain the high-frequency alternating current of 20kHz, high-frequency alternating current through inductance L filtering, is exported direct current stably through after the full-bridge rectification at last.
Following table is the contrast of prior art and the utility model power supply:
| Controllable silicon (thyristor) rectifier power source | The utility model contravariant power | |
| Maximum power | 80KW | 80KW |
| Frequency | 50Hz | 20KHz |
| Output waveform | Generally | Stable |
| Service efficiency | ＜80％ | ＞85％ |
| Volume | 1300×1000×1100 (mm) | 900×600×1200 (mm) |
| Weight | 1000kg | 400kg |
Claims (4)
1. contravariant plasma spraying power supply; comprise a current rectifying and wave filtering circuit (1), IGBT full bridge inverter (2), high frequency transformer (3), secondary current rectifying and wave filtering circuit (4), IGBT drive circuit (5), output current initialization circuit (6), pwm control circuit (7), external characteristic control circuit (8), high-frequency arc ignition circuit (9), Current Control and protective circuit (10), synchronous equalizing control circuit (11); it is characterized in that single group circuit adopts inverter circuit to compose in parallel.
2. contravariant plasma spraying power supply according to claim 1, it is characterized in that, described inverter circuit is that three-phase main-frequency 380V alternating current is transformed into direct current about 540V through rectifying and wave-filtering, form full-bridge inverter by IGBT above-mentioned direct current is carried out inversion once more, it is transformed into the high frequency square wave alternating current, the high frequency square wave alternating current is passed to the secondary of transformer again through high frequency transformer, the full-wave rectifying circuit that is connected the high frequency transformer secondary is a direct current with the rectification of high frequency square wave alternating current secondary once more, and then becomes the direct current output of stable and controllable behind inductor filter.
3. contravariant plasma spraying power supply according to claim 1 is characterized in that adopting 4 groups of inverters to compose in parallel, and adopts flow equalizing circuit, and closed-loop control makes every group of electric power outputting current basically identical.
4. contravariant plasma spraying power supply according to claim 1 is characterized in that IGBT full bridge inverter (2) exchanges the high frequency square wave that direct current carries out forming about 20kHz after the inversion once more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201818819U CN201656791U (en) | 2010-04-29 | 2010-04-29 | Inverter plasma spraying power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201818819U CN201656791U (en) | 2010-04-29 | 2010-04-29 | Inverter plasma spraying power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201656791U true CN201656791U (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201818819U Expired - Fee Related CN201656791U (en) | 2010-04-29 | 2010-04-29 | Inverter plasma spraying power source |
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| CN (1) | CN201656791U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103305827A (en) * | 2012-03-06 | 2013-09-18 | 北京合立星源光电科技有限公司 | Sprayed layer re-melting automatic control circuit |
| CN104264101A (en) * | 2014-09-11 | 2015-01-07 | 芜湖鼎瀚再制造技术有限公司 | Touch screen type plasma spraying system |
| CN105759236A (en) * | 2016-02-04 | 2016-07-13 | 梁彦云 | Charging pile DC electric energy meter calibration device |
| CN106624303A (en) * | 2016-12-16 | 2017-05-10 | 成都华远电器设备有限公司 | Inverter type high-power power supply for fine plasma cutting |
| CN109546876A (en) * | 2019-01-03 | 2019-03-29 | 中国石油大学(华东) | Multichannel high-low pressure composite plasma drilling well power supply |
-
2010
- 2010-04-29 CN CN2010201818819U patent/CN201656791U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103305827A (en) * | 2012-03-06 | 2013-09-18 | 北京合立星源光电科技有限公司 | Sprayed layer re-melting automatic control circuit |
| CN104264101A (en) * | 2014-09-11 | 2015-01-07 | 芜湖鼎瀚再制造技术有限公司 | Touch screen type plasma spraying system |
| CN104264101B (en) * | 2014-09-11 | 2016-08-17 | 芜湖鼎瀚再制造技术有限公司 | A kind of touch screen type plasma spray system |
| CN105759236A (en) * | 2016-02-04 | 2016-07-13 | 梁彦云 | Charging pile DC electric energy meter calibration device |
| CN106624303A (en) * | 2016-12-16 | 2017-05-10 | 成都华远电器设备有限公司 | Inverter type high-power power supply for fine plasma cutting |
| CN109546876A (en) * | 2019-01-03 | 2019-03-29 | 中国石油大学(华东) | Multichannel high-low pressure composite plasma drilling well power supply |
| CN109546876B (en) * | 2019-01-03 | 2020-11-27 | 中国石油大学(华东) | Multi-channel high and low voltage composite plasma drilling power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20150429 |
|
| EXPY | Termination of patent right or utility model |