CN103068087B - A kind of digital electromagnetic induction heater - Google Patents
A kind of digital electromagnetic induction heater Download PDFInfo
- Publication number
- CN103068087B CN103068087B CN201210556421.3A CN201210556421A CN103068087B CN 103068087 B CN103068087 B CN 103068087B CN 201210556421 A CN201210556421 A CN 201210556421A CN 103068087 B CN103068087 B CN 103068087B
- Authority
- CN
- China
- Prior art keywords
- igbt pipe
- power supply
- heating controller
- supply heating
- circuit
- Prior art date
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a kind of digital electromagnetic induction heater, including the three phase mains being sequentially connected electrically, on and off switch, catalyst, also include an induction power supply heating controller, the input of described induction power supply heating controller is connected with the outfan of described catalyst, described induction power supply heating controller is also connected with PC host computer and PLC respectively, and outfan and a load coil of described induction power supply heating controller are connected. Smelting furnace disclosed by the invention and induction heater thereof, have low in energy consumption, cost is low, power saving effect, has that tracking velocity is fast, precision is high, adjustability is strong and catches the advantages such as bandwidth.
Description
Technical field
The present invention relates to a kind of smelting equipment, particularly relate to a kind of digital electromagnetic induction heater.
Background technology
Sensing heating is to utilize electromagnetic induction principle, power supply inputs power frequency, intermediate frequency or high-frequency alternating current toward coil, coil produces alternating magnetic field, and workpiece is placed in this alternating magnetic field, and workpiece produces the faradic current of same frequency, this faradic current is unevenly distributed workpiece, strong on surface, and very weak in inside, to heart portion close to zero, utilize this kelvin effect, surface of the work can be made to heat rapidly. Sensing heating is widely used in multiple fields such as the quenching of Industrial Metal piece surface, Metal Melting, bar be diathermanous.
Induction heater generally includes induction heating power and coil, and induction heating power provides the alternating current needing frequency for coil. Coil major part is tubulose, and the alternating magnetic field that this tubular coil produces is relatively larger in the inside and outside intensity of coil, and just smaller at the both ends of coil, therefore, generally the workpiece needing heating is placed on coil interiorly or exteriorly.
Generally adopting electrothermal tube heating at present at home, owing to electrothermal tube heating is slow, firing equipment is just made very big very long, and floor space is big and structure is complicated. Having employing electromagnetic induction to come generator amature, stator heating in Japan, in order to workpiece being placed on the inside of tubular coil, devise special mechanical hand, and coil needs to be made very big, whole device structure is very complicated, costly.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of low in energy consumption, cost is low, power saving effect, has that tracking velocity is fast, precision is high, adjustability is strong and catches the digital electromagnetic induction heater of bandwidth.
In order to overcome the defect existed in background technology, the technical solution adopted for the present invention to solve the technical problems is:
A kind of digital electromagnetic induction heater, including the three phase mains being sequentially connected electrically, on and off switch, catalyst, also include an induction power supply heating controller, the input of described induction power supply heating controller is connected with the outfan of described catalyst, described induction power supply heating controller is also connected with PC host computer and PLC respectively, and outfan and a load coil of described induction power supply heating controller are connected.
Described induction power supply heating controller include being sequentially connected for make inverter output alternation drive waveforms full bridge inverter, be made up of the series resonant circuit of equivalent circuit described load coil and heating material, for realizing following the tracks of the all-digital phase-locked loop circuit of the resonant frequency of described series resonant circuit, for providing the IGBT drive circuit driving signal to described full bridge inverter.
Described full bridge inverter is connected with described series resonant circuit by a current transformer, and the secondary end of described current transformer is connected with described all-digital phase-locked loop circuit.
Described alternation drive waveforms is square wave.
Described load coil is wrapped in the outer surface of insulating.
The outer surface of described insulating is provided with the wire casing for placing described load coil.
Described insulating is nano heat insulating material.
Described full bridge inverter includes an IGBT pipe, the 2nd IGBT pipe, the 3rd IGBT pipe, the 4th IGBT pipe, and the outfan of described IGBT drive circuit is connected with a described IGBT pipe, the 2nd IGBT pipe, the 3rd IGBT pipe, the 4th IGBT pipe respectively.
Induction heater disclosed in this invention has the following advantages:
(1). frequency-tracking scope is relatively big, motility is good: when processing method and parameter change, only need to by changing software design to adapt to corresponding change.
(2). dynamic response is higher, precision is high: signal processing system can meet required precision by figure place that A/D converts, the word length of processor and suitable algorithm.
(3). good reliability: process system is subject to the impact that the interference of ambient temperature, humidity, noise and electromagnetic field causes less.
(4). can large-scale integrated: along with the development of semiconductor integrated circuit technology, the integrated level of digital circuit can be made significantly high, has the advantages such as volume is little, power consumption is little, good product consistency.
Accompanying drawing explanation
Fig. 1 is the induction power supply heating controller structure principle chart in the present invention;
Fig. 2 is the digital electromagnetic induction heater structural representation in the present invention.
Detailed description of the invention
As shown in Figure 1 and Figure 2, a kind of digital electromagnetic induction heater, including the three phase mains being sequentially connected electrically, on and off switch, catalyst, also include an induction power supply heating controller, the input of described induction power supply heating controller is connected with the outfan of described catalyst, described induction power supply heating controller is also connected with PC host computer and PLC respectively, and outfan and a load coil of described induction power supply heating controller are connected.
Described induction power supply heating controller include being sequentially connected for make inverter output alternation drive waveforms full bridge inverter 1, be made up of the series resonant circuit 2 of equivalent circuit described load coil and heating material, for realizing following the tracks of the all-digital phase-locked loop circuit 3 of the resonant frequency of described series resonant circuit, for providing the IGBT drive circuit 4 driving signal to described full bridge inverter.
Described full bridge inverter is connected with described series resonant circuit by a current transformer, and the secondary end of described current transformer is connected with described all-digital phase-locked loop circuit.
Described alternation drive waveforms is square wave.
Described load coil is wrapped in the outer surface of insulating.
The outer surface of described insulating is provided with the wire casing for placing described load coil.
Described insulating is nano heat insulating material.
Described full bridge inverter includes an IGBT pipe Q1, the 2nd IGBT pipe Q2, the 3rd IGBT pipe Q3, the 4th IGBT pipe Q4, and the outfan of described IGBT drive circuit is connected with a described IGBT pipe, the 2nd IGBT pipe, the 3rd IGBT pipe, the 4th IGBT pipe respectively.
Described electromagnetic induction heating controller is realized by following principle:
Full bridge inverter, circuit is powered by fixing DC source VCC, by alternately turning on and off IGBT pipe, makes the drive waveforms of inverter output alternation, and this drive waveforms is square wave.
Series resonant circuit, this circuit is the equivalent circuit of load coil and heating material, and the resonant frequency having it fixing in heating coil put into by any material, this resonant frequency be exactly digital control circuit initial time the frequency that sets; When material makes the resonant frequency of load change after heating, the difference of the frequency of voltage control signal and the resonant frequency of load is embodied in the card potential difference of voltage control signal and loop current, both frequencies are but equal all the time. when the phase place of loop current is ahead of the phase place of voltage control signal, load is capacitive, and the frequency of voltage control signal is less than the resonant frequency of load; When the phase place of loop current lags behind the phase place of voltage control signal, load is in perception, and the frequency of voltage control signal is more than the resonant frequency of load; And when the phase place of loop current is equal to the phase place of voltage control signal, the frequency of voltage control signal is equal to the resonant frequency of load, now, power supply most effective, drive waveforms be sine wave.
All-digital phase-locked loop circuit, this main circuit to realize frequency-tracking function, and wherein current feedback signal is loop current, and this current feedback signal is by high frequency electric changer, then through what obtain after light-coupled isolation, modulus change; Digital control circuit output voltage control signal, control signal passes through a drive circuit feedback control series-resonant inverting circuit.
The grid VT1 of an IGBT pipe Q1 in described full bridge inverter, the grid VT2 of the 2nd IGBT pipe Q2, the grid VT3 of the 3rd IGBT pipe Q3, the 4th IGBT pipe Q4 grid VT4 be connected with outfan VT11, VT22, VT33, VT44 of described IGBT drive circuit respectively, it is achieved controlled turning on and off of IGBT pipe by described IGBT drive circuit through the grid of outfan, IGBT pipe.
Smelting furnace provided by the invention is when devoting oneself to work, powered by power supply VCC, by alternately turning on and off IGBT pipe, make the drive waveforms of inverter output alternation, a wherein IGBT pipe and the 3rd IGBT pipe one group, 2nd IGBT pipe and the 4th IGBT pipe one group, as opened an IGBT pipe with the 3rd IGBT pipe it is necessary to close the 2nd IGBT pipe and the 4th IGBT pipe; By Current Mutual Inductance effect, and in conjunction with series resonant circuit, done work by the load inductance in series resonant circuit and load coil and heating material, fed-back current signals is to all-digital phase-locked loop circuit simultaneously, frequency-tracking is realized, through full-bridge IGBT drive circuit driven and turn on and off IGBT pipe after then through high frequency electric changer, light-coupled isolation, modulus change.
A kind of smelting furnace disclosed in this invention adopts converter technique, by electrical network 50-60HZ frequency transformation to optimum frequency needed for us, then big electric current passes through speciality coil, material in aluminum melting holding furnace crucible is made to carry out directly to aluminum sensing cutting, and rapid translating is heat, graphite crucible generates heat without heat transfer process. Thoroughly solve tradition electric stove heat-transfer effect not good, the disadvantage that the thermal efficiency is not high. This furnace heat efficiency utilization rate is up to more than 90%, and power saving effect is fairly obvious.
By above-mentioned description, relevant staff in the scope not necessarily departing from this invention technological thought, can carry out various change and amendment completely. The technical scope of this invention is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (4)
1. a digital electromagnetic induction heater, including the three phase mains being sequentially connected electrically, on and off switch, catalyst, it is characterized in that: also include an induction power supply heating controller, the input of described induction power supply heating controller is connected with the outfan of described catalyst, described induction power supply heating controller is also connected with PC host computer and PLC respectively, and outfan and a load coil of described induction power supply heating controller are connected; Described induction power supply heating controller include being sequentially connected for make inverter output alternation drive waveforms full bridge inverter, be made up of the series resonant circuit of equivalent circuit described load coil and heating material, for realizing following the tracks of the all-digital phase-locked loop circuit of the resonant frequency of described series resonant circuit, for providing the IGBT drive circuit driving signal to described full bridge inverter; Described full bridge inverter is connected with described series resonant circuit by a current transformer, and the secondary end of described current transformer is connected with described all-digital phase-locked loop circuit; Described alternation drive waveforms is square wave; Described load coil is wrapped in the outer surface of insulating.
2. according to claim1Described digital electromagnetic induction heater, it is characterised in that: the outer surface of described insulating is provided with the wire casing for placing described load coil.
3. according to claim1Described digital electromagnetic induction heater, it is characterised in that: described insulating is nano heat insulating material.
4. according to claim1Described digital electromagnetic induction heater, it is characterized in that: described full bridge inverter includes an IGBT pipe, the 2nd IGBT pipe, the 3rd IGBT pipe, the 4th IGBT pipe, the outfan of described IGBT drive circuit is connected with a described IGBT pipe, the 2nd IGBT pipe, the 3rd IGBT pipe, the 4th IGBT pipe respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210556421.3A CN103068087B (en) | 2012-12-19 | 2012-12-19 | A kind of digital electromagnetic induction heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210556421.3A CN103068087B (en) | 2012-12-19 | 2012-12-19 | A kind of digital electromagnetic induction heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103068087A CN103068087A (en) | 2013-04-24 |
| CN103068087B true CN103068087B (en) | 2016-06-15 |
Family
ID=48110494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210556421.3A Expired - Fee Related CN103068087B (en) | 2012-12-19 | 2012-12-19 | A kind of digital electromagnetic induction heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103068087B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064217A (en) * | 2016-12-05 | 2017-08-18 | 南京航空航天大学 | Integrated impulse eddy current induced thermal imaging detection means and its detection method |
| CN111741548B (en) * | 2020-08-14 | 2020-11-20 | 佛山市冉智电子科技有限公司 | Low-power-consumption induction heating power control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247680A (en) * | 2008-03-24 | 2008-08-20 | 俞正国 | Induction heating power supply circuit |
| CN202168232U (en) * | 2011-06-30 | 2012-03-14 | 平顶山市鸿发物资贸易有限公司 | Electromagnetic induction heating device for heating metal workpiece |
| CN102711300A (en) * | 2012-06-20 | 2012-10-03 | 北京绿创生态科技有限公司 | Pipe electromagnetism heating device and electromagnetism heating method |
| CN203015159U (en) * | 2012-12-19 | 2013-06-19 | 曾明祥 | All-digital electromagnetic induction heater |
-
2012
- 2012-12-19 CN CN201210556421.3A patent/CN103068087B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247680A (en) * | 2008-03-24 | 2008-08-20 | 俞正国 | Induction heating power supply circuit |
| CN202168232U (en) * | 2011-06-30 | 2012-03-14 | 平顶山市鸿发物资贸易有限公司 | Electromagnetic induction heating device for heating metal workpiece |
| CN102711300A (en) * | 2012-06-20 | 2012-10-03 | 北京绿创生态科技有限公司 | Pipe electromagnetism heating device and electromagnetism heating method |
| CN203015159U (en) * | 2012-12-19 | 2013-06-19 | 曾明祥 | All-digital electromagnetic induction heater |
Non-Patent Citations (1)
| Title |
|---|
| 感应加热器中频电流源的研究与设计;庞玲玲;《河北工业大学硕士学位论文》;20060201;第24-28页和图3.6-3.9 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103068087A (en) | 2013-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lucia et al. | Induction heating appliances: Toward more flexible cooking surfaces | |
| Lucia et al. | Induction heating technology and its applications: past developments, current technology, and future challenges | |
| Meng et al. | Systematic approach to high-power and energy-efficient industrial induction cooker system: circuit design, control strategy, and prototype evaluation | |
| CN203015159U (en) | All-digital electromagnetic induction heater | |
| CN103974477A (en) | Efficient and energy-saving electromagnetic induction heating device | |
| Chakraborty et al. | Behaviour of a High Frequency Parallel Quasi Resonant Inverter Fitted Induction Heater with Different Switching Frequencies. | |
| CN103068087B (en) | A kind of digital electromagnetic induction heater | |
| Sadhu et al. | Review of induction cooking-a health hazards free tool to improve energy efficiency as compared to microwave oven | |
| Aoyama et al. | Proposal and challenge of Halbach array type induction coil for cooktop applications | |
| CN201476264U (en) | Electromagnetic induction heating component | |
| CN203722849U (en) | Air-cooled induction heating power supply | |
| Kovac et al. | Simulation and laboratory model of induction heating in COMSOL multiphysics | |
| CN205119161U (en) | Microwave oven | |
| CN202166088U (en) | Electric ceramic furnace | |
| Lucía et al. | Induction heating appliances: Toward more sustainable and smart home appliances | |
| Uchihori et al. | New induction heated fluid energy conversion processing appliance incorporating auto-tuning PID control-based PWM resonant IGBT inverter with sensorless power factor correction | |
| CN103687116A (en) | Digital FM (Frequency Modulation) PLL (Phase-locked Loop) full-bridge serial resonance electromagnetic induction heating power supply | |
| CN203136213U (en) | Electromagnetic induction heater with wireless control system | |
| CN203608392U (en) | A digital frequency modulation phase-locked loop type full-bridge series connection resonance electromagnetic induction heating power supply | |
| CN203675355U (en) | Electro-magnetic-induction energy-gathered heating device | |
| CN203691665U (en) | Series resonance device for electromagnetic heating | |
| CN203136215U (en) | Electromagnetic induction heater with intelligent control system | |
| Chakraborty et al. | An interference of High Frequency Series Resonant Inverter in domestic induction heater estimation in emission control using FEM | |
| Sadhu et al. | High efficient contamination free clean heat production | |
| CN204334340U (en) | Induction aluminium foil sealing electrical-mechanical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: FOSHAN JIXIN ELECTRICS TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CENG MINGXIANG Effective date: 20141126 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 517362 HEYUAN, GUANGDONG PROVINCE TO: 528200 FOSHAN, GUANGDONG PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20141126 Address after: 528200 Guangdong Province Nanhai District of Foshan city Langsha Avenue new light industrial base of Guangdong core area A District 12 Applicant after: FOSHAN JI XIN ELECTRICAL TECHNOLOGY CO., LTD. Address before: 517362, Guangdong, Heyuan province Longchuan Tian Zhen Zhen Tong village committee Ridge Village 25 Applicant before: Zeng Mingxiang |
|
| 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: 20160615 Termination date: 20161219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |