CN104159345A - Variable frequency electromagnetic heating device - Google Patents
Variable frequency electromagnetic heating device Download PDFInfo
- Publication number
- CN104159345A CN104159345A CN201410406977.3A CN201410406977A CN104159345A CN 104159345 A CN104159345 A CN 104159345A CN 201410406977 A CN201410406977 A CN 201410406977A CN 104159345 A CN104159345 A CN 104159345A
- Authority
- CN
- China
- Prior art keywords
- power
- coil
- soft start
- heating
- temperature sensor
- 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.)
- Pending
Links
Landscapes
- General Induction Heating (AREA)
Abstract
The invention discloses a variable frequency electromagnetic heating device which is mainly composed of an external expansion display, a power control and frequency and phase tracking processor, an IGBT temperature sensor interface, a half bridge dual IGBT drive inlet power tube, a photoelectric isolation soft start interface, soft start normally closed or open work settings and the like. The device is characterized in that the power of the variable frequency electromagnetic heating device is 1 to 2.5kW; the power range is from 30% to 100%; a temperature measuring port below 200 DEG C is next to a temperature sensor, and the distance is 2 to 6cm; the device has a soft start heating/stop mode and a coil no-load and coil short-circuit protection function; eddy current heating can be carried out on a vacuum insulation panel whose outermost layer is an aluminum foil; and the traditional method of increasing frequency or coil current to improve the heating efficiency of the aluminum foil is removed. By using the device, the cost is reduced, and the application scope is further expanded.
Description
Technical field
The present invention relates to a kind of variable-frequency electromagnetic heating device, the device that particularly a kind of vacuum heat-insulating plate variable-frequency heating that is aluminium foil to outermost layer carries out eddy-current method detection.
Background technology
According to maxwell's Theory of Electromagnetic Field, the magnetic field that the electric current of variation can change, the magnetic field of variation will inspire the electric field of vortex again.For a metal that is placed in this alternating electromagnetic field, its is inner can produce countless eddy current, thereby produces heat.Eddy current is directly proportional to eddy electric field intensity, is directly proportional, to square being directly proportional of ac frequency to magnetic induction (being exciting current intensity).If make electromagnetic heater reach certain heating power, it must produce enough high-frequency electromagnetic field and want and can produce sufficiently high magnetic flux density.Control circuit raises direct current voltage, and rectification circuit makes voltage become alternating current from direct current, and high-frequency alternating electric current inspires the magnetic field of high-frequency alternating by induction coil; High-frequency alternating magnetic field can inspire again the eddy electric field of same frequency, if there is metal object to be placed in one, will produce fast heat because of the effect of eddy current.
Electromagnetic oven in daily life adopts the method for pulse detection or Current Mutual Inductance, has realized the material of cooker is detected, if qualified pot body do not detected, electromagnetic oven is just reported to the police and do not worked.Because aluminium has the magnetic permeability similar with air, be not easy to assemble magnetic field and easily produce scattering phenomenon, its eddy current heat production effect is significantly reduced.Common aluminium or copper resistance rate are too small in addition, by formula P=I
2r, it is known that in the situation that electric current is certain, resistance is less, and heating power is lower.Therefore, electromagnetic oven is not to heat in essence aluminum pot, and just because its efficiency of heating surface is not high, system has been taked the restriction of power-off protection automatically to electromagnetic oven.
In " aluminum pot heating electromagnetic oven " document of delivering on the firm periodical of power electronic technology abroad in palace ground, mention and increase magnetic flux by the method for increase heater coil number of ampere turns, make up the faint shortcoming of magnetic flux deficiency, eddy current causing because aluminium magnetic permeability is low.When the energising frequency of heater coil is 62KHZ, electric current is 48A, and when adding thermal output and reaching 2400W, the efficiency of heating surface can rise to 63%, makes this kind of electromagnetic heating apparatus can reach practical level.But adopt above method can cause two problems: first frequency increases, and can make skin effect obviously increase; It two is to increase the electric current of heater coil, can make heater coil heating serious, causes energy waste, the coil lost of life, and reliability reduces.According to actual production life requirement, we have carried out transformation audaciously to the circuit of electromagnetic heater, can meet the condition of heating aluminium foil.When the vacuum heat-insulating plate that this electromagnetic heater is aluminium foil to outermost layer heats, power can change in 1～2.5kw.So not only reduce processing cost, saved a large amount of material costs, also expanded the scope of application of electromagnetic heater.
Summary of the invention
Object of the present invention is intended to overcome the deficiencies in the prior art, and a kind of variable-frequency electromagnetic heating device is provided.
For the technical scheme that realizes object employing of the present invention is: a kind of variable-frequency electromagnetic heating device is provided, this device mainly drives import power tube by power lights, work light, trouble light, external expanded scope, one chip microcomputer, regulating power button, power control and frequency plot tracking processor, import high-quality bridge heap, IGBT temperature sensor interface, the two IGBT of half-bridge, and photoelectricity isolates that soft start interface, soft start are often opened or normally closed work such as arranges at the composition.A kind of variable-frequency electromagnetic heating device, it is characterized in that it is the condition of work that the vacuum heat-insulating plate of aluminium foil carries out eddy heating for heating that this variable-frequency electromagnetic heating device can meet outermost layer, break the tradition that increase frequency and coil current improve the aluminium foil efficiency of heating surface, not only reduce processing cost and material cost, also further expanded its scope of application.It is characterized in that power is 1～2.5kw, power variation scope is 300%～100%; The other temperature-measuring ports that have below individual 200 DEG C of temperature sensor, distance is 2～6cm between the two; There are soft start heating/stop mode and coil zero load, coil short defencive function, make the required distance of coil and load not strict, can trouble free service within the scope of 0～25mm.
Effect: the present invention compared with prior art, has the following advantages: (1) power regulating range, 30%～100%, can regulate according to oneself needing, and uses flexibly; (2) used without difference frequency tra control circuit, machine is operated near resonance point, machine loss minimum, power maximum, heat efficiency optimum; (3) at the other temperature-measuring port that has a 2～6cm 200 DEG C below of temperature sensor, control temperature accurate, when detected temperatures is during 0～100 DEG C of scope, detecting error be only ± 1 DEG C, make that this device oil heats, apply in heating system extremely extensive; (4) there is soft start heating/stop mode and coil zero load, coil short defencive function, make the required distance of coil and load not strict, can safe and reliable work within the scope of 0～25mm.
Brief description of the drawings
The structural representation of Fig. 1 variable-frequency electromagnetic heating device of the present invention.
Diagram 10 is power lights; 20 is work light; 30 is trouble light; 40 is external expanded scope; 50 is one chip microcomputer; 60 is regulating power button; 70 is power control and frequency plot tracking processor; 80 is import high-quality bridge heap; 90 is IGBT temperature sensor interface; 100 is that the two IGBT of half-bridge drive import power tube; 110 is photoelectricity isolation soft start interface; 120 often open or normally closed work setting for soft start.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims to the amendment of the various equivalent form of values of the present invention and limit.
Embodiment
As shown in Figure 1, a kind of variable-frequency electromagnetic heating device, is characterized in that 10, power lights; 20, work light; 30, trouble light; 40, external expanded scope; 50, one chip microcomputer; 60, regulating power button; 70, power control and frequency plot tracking processor; 80, import high-quality bridge heap; 90, IGBT temperature sensor interface; 100, the two IGBT of half-bridge drive import power tube; 110, photoelectricity isolation soft start interface; 120, soft start is often opened or normally closed work setting.It is the condition of work that the vacuum heat-insulating plate of aluminium foil carries out eddy heating for heating that this variable-frequency electromagnetic heating device can meet outermost layer, break the tradition that increase frequency and coil current improve the aluminium foil efficiency of heating surface, not only reduce processing cost and material cost, also further expanded the scope of application.
It is characterized in that power is 2kw, adjustable range, 30%～100%, can regulate according to oneself needing, and uses flexibly; Use without difference frequency tra control circuit, machine is operated near resonance point, machine loss minimum, power maximum, heat efficiency optimum; Have individual temperature-measuring port below 200 DEG C temperature sensor Pang, distance is 4cm between the two; Photoelectricity isolation soft start interface, supports polylith plank Parallel Control; There is soft start heating/stop mode and coil zero load, coil short defencive function, make the required distance of coil and load not strict, can safe and reliable work in 25mm.
Above are only single embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading the scope of protection of the invention.In every case be the content that does not depart from technical solution of the present invention, any type of simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection range of technical solution of the present invention.
Claims (4)
1. a variable-frequency electromagnetic heating device, it is characterized in that driving import power tube by external expanded scope, one chip microcomputer, regulating power button, power control and frequency plot tracking processor, import high-quality bridge heap, IGBT temperature sensor interface, the two IGBT of half-bridge, photoelectricity isolation soft start interface, soft start are often opened or normally closed work such as arranges at the composition.
2. according to device claimed in claim 1, it is characterized in that power is 1～2.5kw, power variation scope is 30%～100%.
3. according to device claimed in claim 1, it is characterized in that the other temperature-measuring ports that have below individual 200 DEG C of temperature sensor, spacing is 2～6cm.
4. according to device claimed in claim 1, it is characterized in that this device has soft start heating/stop mode and coil zero load, coil short defencive function, make the required distance of coil and load not strict, can trouble free service within the scope of 0～25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406977.3A CN104159345A (en) | 2014-08-18 | 2014-08-18 | Variable frequency electromagnetic heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406977.3A CN104159345A (en) | 2014-08-18 | 2014-08-18 | Variable frequency electromagnetic heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104159345A true CN104159345A (en) | 2014-11-19 |
Family
ID=51884726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410406977.3A Pending CN104159345A (en) | 2014-08-18 | 2014-08-18 | Variable frequency electromagnetic heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104159345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111316757A (en) * | 2017-11-08 | 2020-06-19 | 三菱电机株式会社 | Induction heating cooker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265189A (en) * | 1989-03-27 | 1990-10-29 | Tokin Corp | Electromagnetic cooker |
| CN1816226A (en) * | 2004-11-15 | 2006-08-09 | 株式会社东芝 | Inductance heating cooking appliance |
| CN103567195A (en) * | 2012-07-26 | 2014-02-12 | 中国石油天然气股份有限公司 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
-
2014
- 2014-08-18 CN CN201410406977.3A patent/CN104159345A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265189A (en) * | 1989-03-27 | 1990-10-29 | Tokin Corp | Electromagnetic cooker |
| CN1816226A (en) * | 2004-11-15 | 2006-08-09 | 株式会社东芝 | Inductance heating cooking appliance |
| CN103567195A (en) * | 2012-07-26 | 2014-02-12 | 中国石油天然气股份有限公司 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111316757A (en) * | 2017-11-08 | 2020-06-19 | 三菱电机株式会社 | Induction heating cooker |
| CN111316757B (en) * | 2017-11-08 | 2022-02-18 | 三菱电机株式会社 | Induction heating cooker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103974477A (en) | Efficient and energy-saving electromagnetic induction heating device | |
| CN204313361U (en) | A kind of electromagnetic induction heating type hand warmer | |
| CN204244499U (en) | Invariable power varible-frequency electromagnetic heater | |
| CN202024601U (en) | High-frequency electromagnetic induction heating device for industrial metal furnace | |
| CN104359752A (en) | Electric heating digestion instrument | |
| CN201658229U (en) | Ceramic boiler accepting multiple heating ways | |
| CN104159345A (en) | Variable frequency electromagnetic heating device | |
| CN2824773Y (en) | Ceramic cooker pan | |
| CN202973225U (en) | Novel throwable electromagnetic induction heating device | |
| CN201593825U (en) | Quick-heating type full-bridge induction cooker | |
| CN101568205A (en) | Electromagnetic heating system | |
| CN101865526A (en) | High-frequency electromagnetic induction water heater | |
| CN205825141U (en) | A kind of novel high-frequency electromagnetic oven | |
| CN203815244U (en) | Split type electromagnetic heating device | |
| CN203675355U (en) | Electro-magnetic-induction energy-gathered heating device | |
| CN204063172U (en) | A kind of electromagnetic oven | |
| CN203827541U (en) | Efficient energy-saving electromagnetic induction heater | |
| CN209672391U (en) | A kind of electromagnetic oven of detectable electromagnetic radiation | |
| CN210082341U (en) | Novel safe energy-conserving mould temperature machine heating device | |
| CN203148011U (en) | Microcomputer self-control variable-frequency electromagnetic water heater | |
| CN203549931U (en) | Commercial electromagnetic cooker | |
| CN103405143A (en) | Electric cooker | |
| CN202602946U (en) | Induction cooker circuit | |
| CN207317883U (en) | A kind of Anti-freezing water meter | |
| CN103096553A (en) | Sensing heating coil applied to kitchen pot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215400 Chengxiang City, Taicang Province town of the People South Road, No. 162, No. Applicant after: TAICANG PAIOU TECHNOLOGY CONSULTATION SERVICE CO., LTD. Address before: Taicang City, Suzhou City, Jiangsu Province, and 215400 Metro Jianxiong Road No. 20 Applicant before: TAICANG PAIOU TECHNOLOGY CONSULTATION SERVICE CO., LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141119 |