CN203434871U - Novel high-frequency induction welding power supply structure - Google Patents
Novel high-frequency induction welding power supply structure Download PDFInfo
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- CN203434871U CN203434871U CN201320528913.1U CN201320528913U CN203434871U CN 203434871 U CN203434871 U CN 203434871U CN 201320528913 U CN201320528913 U CN 201320528913U CN 203434871 U CN203434871 U CN 203434871U
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- power supply
- novel high
- induction welding
- frequency induction
- welding power
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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
Abstract
The utility model discloses a novel high-frequency induction welding power supply structure comprising a rectification circuit module. The novel high-frequency induction welding power supply structure is characterized in that: the rectification circuit module adopts a three-phase voltage PWM rectification circuit; the rectification circuit module is sequentially connected with a chopper circuit unit and an inverter circuit module; and the inverter circuit module is directly connected to a load. The beneficial effects of the novel high-frequency induction welding power supply structure are that: induction welding which is energy saving, environment protecting, safe and is honored as a green welding mode will gradually replace traditional welding modes. Practice has proved that the novel high-frequency induction welding power supply has the advantages of being strong in performance and high in efficiency.
Description
Technical field
The utility model relates to a kind of novel high-frequency induction welding power supply architecture.
Background technology
High-frequency welding is a kind of novel mode of heating, not only can weld various metal materials, can also carry out the techniques such as hot working, heat treatment, diathermanous, melting to various metal materials.For the heating effect of current heating of traditional resistor and the source of welding current of flame heating, it has the advantages such as low-cost high-efficiency, energy-conserving and environment-protective environmental protection, coefficient of safety are high, easy to carry.
The operation principle of high-frequency welding power supply is: first in High-frequency machine by a whole set of unique electronic circuit, the low frequency ac of inputting into from electrical network (50Hz) is transformed into high-frequency alternating current (generally more than 20000Hz).High-frequency current is added to after inductance coil (being induction coil), utilizes electromagnetic induction principle to convert high frequency magnetic field to, and acts on the metal object in magnetic field; Utilize eddy current effect, generate the induced current being directly proportional to magnetic field intensity in metal object, this eddy current is affected by kelvin effect, and frequency is higher, more concentrates on the top layer of metal object.When eddy current flows in metal object, can utilize heating effect of current principle producing heat by means of the intrinsic resistance value in inside, firing rate is fast, and efficiency is high, can any metal object of instant melting, and firing rate and temperature controlled.
The AC-DC-AC circuit structure that current induction welding power supply is common, input rectifying side generally adopts thyristor transformation or diode rectification, the method of the direct filtering of electrochemical capacitor completes input three-phase input AC electricity is become to galvanic switching process, as shown in Figure 1, common HFI welding power supply architecture block diagram.
But this structure has caused net side, power factor is low, and harmonic content is larger, large to the impulse current of electrical network, and this will pollute electrical network, cause electric energy loss.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, and a kind of novel high-frequency induction welding power supply architecture is provided.
To achieve these goals, the utility model adopts following technical scheme:
Novel high-frequency induction welding power supply architecture, it comprises rectification circuit module, it is characterized in that, described rectification circuit module is selected three-phase voltage type PWM rectification circuit, and this rectification circuit module is sequentially connected with chopper circuit unit, inverter circuit module, this inverter circuit module directly accesses load.
As the utility model, comparatively it is desirable to described chopper circuit unit is selected DC-DC chopper circuits non-isolated, many switching tubes.
As the utility model, comparatively it is desirable to, described chopper circuit unit is three Level Buck DC-DC Converters.
As the utility model, comparatively it is desirable to, in whole novel high-frequency induction welding power supply architecture, the voltage source of series resonance load inverter is connected with a large capacitances in series mode by a rectification circuit.
Rectification circuit module as described herein, this first order translation circuit adopts three-phase active power factor correcting circuit (PWM rectification circuit) to replace the rectifying part of traditional circuit, not only realized the conversion of alternating current-direct current, and realized the same-phase of voltage on line side and electric current, the power factor that has improved system, has reduced harmonic pollution.
The utlity model has following beneficial effect: this power supply is succinctly efficient in high-power lower system configuration, energy can transmitted in both directions, and control precision is high, adjustable range is large.Three-phase voltage type PWM rectification circuit has not only been realized the conversion of alternating current-direct current, Active Power Factor Correction widely technology improves system power factor, reduces harmonic content, and the existence of this rectifier Inductor makes rectification circuit have the characteristic of Boost circuit; Series load resonant inverter, for the low requirement of operational environment, makes overall efficiency reach the highest, has also improved the scope of application of this HFI welding power supply; DC transfer circuit has partly adopted a kind of non-isolated DC converter three level Buck circuit that are applicable to large-power occasions, has realized the adjustable of inverter input side direct voltage and power.
There is energy-saving and environmental protection, safety and be described as the induction welding of " green welding " mode, will progressively substitute traditional welding manner.Facts have proved that the novel high-frequency source of welding current of the present invention has high-performance, high efficiency feature.
Accompanying drawing explanation
Fig. 1 is common HFI welding power supply architecture block diagram.
Fig. 2 is novel high-frequency induction welding power supply architecture block diagram.
Fig. 3 is series resonance load inverter structural representation.
Fig. 4 is three Level Buck DC-DC Converter structural representations.
Fig. 5 is novel high-frequency induction welding electric power main circuit topological structure.
Description of reference numerals: VT1-VT12. power switch pipe; C1-C5. electric capacity; D1-D6. diode; R, R '. resistance; L, L '. inductance.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 2,5, novel high-frequency induction welding power supply architecture, it comprises rectification circuit module, described rectification circuit module is selected three-phase voltage type PWM rectification circuit 1, and this rectification circuit module is sequentially connected with chopper circuit unit 2, inverter circuit module 3, this inverter circuit module directly accesses load 4.
This power supply architecture is succinctly efficient in high-power lower system configuration, and energy can transmitted in both directions, and control precision is high, adjustable range is large.Three-phase voltage type PWM rectification circuit has not only been realized the conversion of alternating current-direct current, Active Power Factor Correction improves system power factor widely, reduce harmonic content, the existence of this rectifier Inductor makes rectification circuit have the characteristic of Boost circuit, series load resonant inverter is for the ground requirement of operational environment, make overall efficiency reach the highest, also improved the scope of application of this product, DC transfer circuit has partly adopted a kind of non-isolated DC converter three level Buck circuit that are adapted to large-power occasions, realized the adjustable of inverter input side direct voltage and power.
Described chopper circuit unit is selected non-isolated, the DC-DC chopper circuit of many switching tubes, in other words, chopper circuit unit is three Level Buck DC-DC Converters, its circuit topological structure is referring to Fig. 4, the figure shows power switch pipe VT7, VT8, sustained diode 1, D2 and filter capacitor C4, inductance L ', resistance R ', the maximum ripple of three Level Buck DC-DC Converter inductive currents is only 1/4 of two level Buck translation circuits, if require the maximum ripple coefficient of both inductive currents identical, the filter inductance of three Level Buck DC-DC Converters also can be reduced to 1/4 of traditional two level Buck converter filter inductances so, if it is identical that filter inductance ripple is washed one's face and rinsed one's mouth, the frequency that the filter capacitor of three Level Buck DC-DC Converter outputs discharges and recharges is compared two Level Buck DC-DC Converters and is doubled, the size of filter capacitor just can be reduced to half of filter capacitor under two level like this, therefore under the same conditions, select tri-level circuit can reduce the parameter of filtering device, thereby greatly reduced the volume of complete machine power supply.Meanwhile, the voltage stress that power switch pipe in three Level Buck DC-DC Converters and fly-wheel diode bear when turn-offing is only half of input voltage, at this, just than traditional two Level Buck DC-DC Converter voltage stresss that switching tube bears, decline one times on the one hand, greatly improved the condition of work of power switch pipe.
Referring to Fig. 3, in whole novel high-frequency induction welding power supply architecture, the voltage source of series resonance load inverter is connected with a large capacitances in series mode by a rectification circuit, in circuit shown in Fig. 3, include power switch pipe VT9～VT12, capacitor C 5, inductance L and resistance R and diode D3～D6, the load of induction welding power supply presents a kind of resistance sense characteristic, this has just caused induction welding power supply can produce a large amount of idle load being done to the used time, for to these idle compensating, the electric capacity connecting in load is cancelled out each other the induction reactance of load and capacitive reactance, output voltage and electric current homophase, circuit generation resonance.When capacitance is enough large, the voltage that can assert inverter input terminal is changeless, and when the operating frequency of inverter is just in time identical with resonance frequency, now the operating efficiency of power supply will reach maximum.
Constantly four power switch pipe VT9～VT12 of alternate conduction and shutoff, just can obtain the square-wave voltage of alternation at the output of inverter, and its electric voltage frequency depends on the frequency of power switch pipe, the amplitude that amplitude is input terminal voltage.By the switching frequency of control inverter power switch pipe, make the frequency of output voltage equal the resonance frequency of RLC series load as far as possible, can make like this loaded work piece under resonance or quasi-resonance state, improved the power factor of power supply output.
When the alternative frequency of additional power source equals natural frequency, the power factor of resonant circuit is 1, and active power equals apparent power, and now the power output of inverter reaches maximum, when so inverter is operated in resonance frequency, can be so that overall efficiency reaches maximum.This series resonance load inverter is not very harsh to the requirement of operational environment, and inductor and inversion output can long distance joins, and the length of lead-in wire can not have much impact to operating efficiency simultaneously, can be frequently, power adjustments mode is flexible.
In literary composition, do not state part for known prior art, all can be with reference to existing known circuits such as the connected mode of the electronic devices and components of each several part circuit.
The foregoing is only preferred implementation of the present utility model, protection range of the present utility model is not limited in above-mentioned execution mode, and every technical scheme that belongs to the utility model principle all belongs to protection range of the present utility model.For a person skilled in the art, some improvement of carrying out under the prerequisite that does not depart from principle of the present utility model, these improvement also should be considered as protection range of the present utility model.
Claims (4)
1. novel high-frequency induction welding power supply architecture, it comprises rectification circuit module, it is characterized in that, described rectification circuit module is selected three-phase voltage type PWM rectification circuit, and this rectification circuit module is sequentially connected with chopper circuit unit, inverter circuit module, this inverter circuit module directly accesses load.
2. novel high-frequency induction welding power supply architecture according to claim 1, is characterized in that, described chopper circuit unit is selected DC-DC chopper circuits non-isolated, many switching tubes.
3. novel high-frequency induction welding power supply architecture according to claim 1, is characterized in that, described chopper circuit unit is three Level Buck DC-DC Converters.
4. novel high-frequency induction welding power supply architecture according to claim 1, is characterized in that, in whole novel high-frequency induction welding power supply architecture, the voltage source of series resonance load inverter is connected with a large capacitances in series mode by a rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320528913.1U CN203434871U (en) | 2013-08-28 | 2013-08-28 | Novel high-frequency induction welding power supply structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320528913.1U CN203434871U (en) | 2013-08-28 | 2013-08-28 | Novel high-frequency induction welding power supply structure |
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| CN203434871U true CN203434871U (en) | 2014-02-12 |
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| CN201320528913.1U Expired - Fee Related CN203434871U (en) | 2013-08-28 | 2013-08-28 | Novel high-frequency induction welding power supply structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106464147A (en) * | 2014-02-28 | 2017-02-22 | 施密徳豪泽股份公司 | Frequency converter |
| CN110943626A (en) * | 2019-10-28 | 2020-03-31 | 湖北工业大学 | Ultrasonic power supply based on cascade Buck technology |
| CN111983501A (en) * | 2020-08-26 | 2020-11-24 | 广东电网有限责任公司电力科学研究院 | Modular energy feedback type AC/DC virtual load |
| CN113751833A (en) * | 2021-10-18 | 2021-12-07 | 宁波微鹅电子科技有限公司 | Welding circuit and control method thereof |
| CN114204839A (en) * | 2021-11-04 | 2022-03-18 | 固赢科技(深圳)有限公司 | Coating power supply system and coating device comprising same |
-
2013
- 2013-08-28 CN CN201320528913.1U patent/CN203434871U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106464147A (en) * | 2014-02-28 | 2017-02-22 | 施密徳豪泽股份公司 | Frequency converter |
| US10432128B2 (en) | 2014-02-28 | 2019-10-01 | Schmidhauser Ag | Frequency converter |
| CN110943626A (en) * | 2019-10-28 | 2020-03-31 | 湖北工业大学 | Ultrasonic power supply based on cascade Buck technology |
| CN111983501A (en) * | 2020-08-26 | 2020-11-24 | 广东电网有限责任公司电力科学研究院 | Modular energy feedback type AC/DC virtual load |
| CN113751833A (en) * | 2021-10-18 | 2021-12-07 | 宁波微鹅电子科技有限公司 | Welding circuit and control method thereof |
| CN113751833B (en) * | 2021-10-18 | 2023-12-05 | 宁波微鹅电子科技有限公司 | Welding circuit and control method thereof |
| CN114204839A (en) * | 2021-11-04 | 2022-03-18 | 固赢科技(深圳)有限公司 | Coating power supply system and coating device comprising same |
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| 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: 20140212 Termination date: 20150828 |
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| EXPY | Termination of patent right or utility model |