CN110401995A - A kind of electromagnetic heating apparatus - Google Patents
A kind of electromagnetic heating apparatus Download PDFInfo
- Publication number
- CN110401995A CN110401995A CN201810396919.5A CN201810396919A CN110401995A CN 110401995 A CN110401995 A CN 110401995A CN 201810396919 A CN201810396919 A CN 201810396919A CN 110401995 A CN110401995 A CN 110401995A
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- inductance coil
- coil disk
- insulated gate
- igbt1
- gate bipolar
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 67
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 206010037660 Pyrexia Diseases 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/04—Sources of current
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
A kind of electromagnetic heating apparatus include for generate alternating magnetic field when being powered so that the conductor product fever in the alternating magnetic field inductance coil disk (L3), connect to be used to form the resonant capacitor of LC resonance circuit (C4), DC power supply (200), insulated gate bipolar transistor (IGBT1) and control circuit (100) with the inductance coil disk (L3)；The collector and emitter of inductance coil disk (L3), DC power supply (200) and insulated gate bipolar transistor (IGBT1) connects to form heating circuit；Control circuit (100) is used to provide impulse wave to the grid of insulated gate bipolar transistor (IGBT1) to realize the alternating of insulated gate bipolar transistor (IGBT1) on and off, and inductance coil disk (L3) accesses the heating circuit by inner end and middle ends；The both ends of resonant capacitor (C4) are separately connected inner end and the middle ends of inductance coil disk (L3).Electromagnetic heating apparatus of the invention it is ingenious in design, it is practical.
Description
Technical field
The present invention relates to electromagnetic heating field more particularly to a kind of electromagnetic heating apparatus.
Background technique
As electromagnetic oven upgrading and EMC require stringenter situation, on the basis of keeping prior art advantage, energy
Enough reducing cost and mention high performance product just can be competitive in future.For electromagnetic oven, inductance coil disk is master therein
Component is wanted, for realizing electromagnetic conversion heating, coil panel performance directly affects electromagnetic conversion heating efficiency, EMC performance.It is existing
There is different degrees of leakage field and EMC interference in inductance coil disk.
Summary of the invention
The purpose of the present invention is in view of the above technical problems, propose a kind of electromagnetic heating apparatus.
The present invention the technical solution to solve the technical problem is that:
The invention proposes a kind of electromagnetic heating apparatus, including for generating alternating magnetic field when being powered so as to be in the friendship
The inductance coil disk of conductor product fever in varying magnetic field is connect with the inductance coil disk to be used to form LC resonance circuit
Resonant capacitor, DC power supply, insulated gate bipolar transistor and control circuit；Inductance coil disk, DC power supply and absolutely
The collector and emitter of edge grid bipolar junction transistor connects to form heating circuit；Control circuit and insulated gate bipolar transistor
Grid be electrically connected, for insulated gate bipolar transistor grid provide impulse wave to realize insulated gate bipolar crystal
The alternating of pipe on and off, inductance coil disk described in inner end and the access of the middle ends between inner end and outer end by adding
Hot loop；The both ends of resonant capacitor are separately connected inner end and the middle ends of inductance coil disk.
In the above-mentioned electromagnetic heating apparatus of the present invention, the anode of DC power supply is connect with the middle ends of inductance coil disk, electricity
Feel the collector of the interior termination insulated gate bipolar transistor of coil panel；The emitter of insulated gate bipolar transistor is protected through second
The cathode for protecting resistor and DC power supply connects；The hanging or middle ends with inductance coil disk in the outer end of inductance coil disk connect
It connects.
In the above-mentioned electromagnetic heating apparatus of the present invention, the anode of DC power supply is connect with the inner end of inductance coil disk, inductance
The collector of the middle part termination insulated gate bipolar transistor of coil panel；The emitter of insulated gate bipolar transistor is protected through second
The cathode for protecting resistor and DC power supply connects；The hanging or middle ends with inductance coil disk in the outer end of inductance coil disk connect
It connects.
In the above-mentioned electromagnetic heating apparatus of the present invention, DC power supply includes AC power source and rectifier；AC power source has
Firewire and zero curve, firewire and zero curve are separately connected two input terminals of rectifier；The output cathode of rectifier is as DC power supply
Anode, cathode of the output negative pole of rectifier as DC power supply.
In the above-mentioned electromagnetic heating apparatus of the present invention, fuse is provided between firewire and rectifier.
In the above-mentioned electromagnetic heating apparatus of the present invention, the first protection electricity is parallel between two input terminals of rectifier respectively
Hinder device and the first filter condenser.
In the above-mentioned electromagnetic heating apparatus of the present invention, the output cathode of rectifier connects through core inductances and inductance coil disk
It connects.
In the above-mentioned electromagnetic heating apparatus of the present invention, energy storage electricity is connected between the output cathode and output negative pole of rectifier
Container.
In the above-mentioned electromagnetic heating apparatus of the present invention, the output cathode of rectifier is after core inductances again through the second filtering
Capacitor is followed by the emitter of edge grid bipolar junction transistor；The emitter of edge grid bipolar junction transistor is grounded.
Electromagnetic heating apparatus of the invention accesses described heat back by using by the middle ends of inductance coil disk and inner end
Road, and the outer end of inductance coil disk is made not access heating circuit, so that the outer ring of inductance coil disk becomes a shading ring,
For shielding electromagnetic interference, and the shading ring is linked into electromagnetic heating mainboard, moreover it is possible to be absorbed interference, be incited somebody to action by mainboard
The interference consumes, and is based on this two o'clock, has the function that reduce EMC interference.It is appreciated that inductance coil disk can also by with
Resonant capacitor replaces position, specifically connects the cathode of its inner end or middle ends and DC power supply, to realize that access is heated back
The purpose on road.These technical solutions, which all cover, passes through inner end and the middle ends between inner end and outer end in inductance coil disk
It accesses under this technical idea of the heating circuit.Therefore, electromagnetic heating apparatus of the invention ingenious in design, practicability
By force.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 shows a kind of circuit diagram of existing electromagnetic heating apparatus；
Fig. 2 shows a kind of circuit diagrams of electromagnetic heating apparatus of first embodiment of the invention；
Fig. 3 shows the circuit diagram of another electromagnetic heating apparatus of first embodiment of the invention；
Fig. 4 shows a kind of circuit diagram of electromagnetic heating apparatus of second embodiment of the invention；
Fig. 5 shows the circuit diagram of another electromagnetic heating apparatus of second embodiment of the invention.
Specific embodiment
In order to keep technical purpose of the invention, technical solution and technical effect apparent, in order to art technology
Personnel understand and implement the present invention, and the present invention will be further described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, Fig. 1 shows a kind of circuit diagram of existing electromagnetic heating apparatus.The electromagnetic heating apparatus includes using
In generate alternating magnetic field when being powered so that the conductor product fever in the alternating magnetic field inductance coil disk L2, with it is described
Inductance coil disk L2 parallel connection is brilliant with the resonant capacitor C4, DC power supply 200, insulated gate bipolar for being used to form LC resonance circuit
Body pipe IGBT1 and control circuit 100；Inductance coil disk L2, DC power supply 200 and insulated gate bipolar transistor IGBT 1
Collector and emitter formed heating circuit；Control circuit 100 and the grid of insulated gate bipolar transistor IGBT 1 electrically connect
It connects, provides impulse wave for the grid to insulated gate bipolar transistor IGBT 1 to realize insulated gate bipolar transistor IGBT 1
The alternating of on and off.In this way, the cooperation of insulated gate bipolar transistor IGBT 1 and LC resonance circuit can heat back
Alternating current is generated in road, which flows through inductance coil disk L2, and inductance coil disk L2 can be made to generate alternating magnetic field.Into one
Step ground, conductor product is usually the metal parts on canister or nonmetallic vessel.When conductor product is in alternating magnetic field
When middle, induced current can be generated inside conductor product, which can generate heat, to realize electromagnetic heating.
Further, DC power supply 200 includes AC power source and rectifier U1；AC power source has firewire ACL and zero curve
ACN, firewire ACL and zero curve ACN are separately connected two input terminals of rectifier U1；It is provided between firewire ACL and rectifier U1
Fuse FUSE.
Further, the filter of the first protective resistor RZ and first is parallel between two input terminals of rectifier U1 respectively
Wave capacitor C1.
Further, the output cathode of rectifier U1 is connect through core inductances L1 with one end of inductance coil disk L2, electricity
Feel the collector of another termination insulated gate bipolar transistor IGBT 1 of coil panel L2；Insulated gate bipolar transistor IGBT 1
Emitter is connect through the second protective resistor RC with the output negative pole of rectifier U1.
Further, energy-storage capacitor C3 is connected between the output cathode and output negative pole of rectifier U1.Rectifier U1
Output cathode be followed by the transmitting of edge grid bipolar transistor IGBT 1 through the second filter condenser C2 again after core inductances L1
Pole.The emitter of edge grid bipolar transistor IGBT 1 is grounded.
For existing electromagnetic heating apparatus as shown in Figure 1, there is different degrees of leakage field and EMC in inductance coil disk
Interference.With regard to the technical problem, the application improves the number of turns of inductance coil disk based on technical solution as shown in Figure 1, meanwhile, also
Heating circuit is not accessed into the outer end of inductance coil disk, so that leakage is reduced as shading ring, to realize in the outer ring of inductance coil disk
Magnetic and the purpose for improving EMC performance.
First embodiment
As shown in Figures 2 and 3, Fig. 2 shows a kind of circuit diagrams of electromagnetic heating apparatus of first embodiment of the invention.Figure
3 show the circuit diagram of another electromagnetic heating apparatus of first embodiment of the invention.The electromagnetic heating apparatus include for
Alternating magnetic field is generated when energization so that the inductance coil disk L3 and the inductance that the conductor product in the alternating magnetic field generates heat
Coil panel L3 connection is to be used to form resonant capacitor C4, the DC power supply 200, insulated gate bipolar transistor of LC resonance circuit
IGBT1 and control circuit 100；The collection of inductance coil disk L3, DC power supply 200 and insulated gate bipolar transistor IGBT 1
Electrode and emitter form heating circuit；The grid of control circuit 100 and insulated gate bipolar transistor IGBT 1 is electrically connected,
Impulse wave is provided for the grid to insulated gate bipolar transistor IGBT 1 to realize that insulated gate bipolar transistor IGBT 1 is led
Logical and cut-off alternating.In this way, the cooperation of insulated gate bipolar transistor IGBT 1 and LC resonance circuit can be in heating circuit
Middle generation alternating current, the alternating current flow through inductance coil disk L3, and inductance coil disk L3 can be made to generate alternating magnetic field.Further
Ground, conductor product are usually the metal parts on canister or nonmetallic vessel.When conductor product is in alternating magnetic field
When, conductor product inside can generate induced current, which can generate heat, to realize electromagnetic heating.
Further, in the present embodiment, inductance coil disk L3 by inner end and between inner end and outer end in
Portion is terminated into the heating circuit.Specifically, as shown in Fig. 2, the middle ends of the anode and inductance coil disk L3 of DC power supply 200
Connection, the collector of the interior termination insulated gate bipolar transistor IGBT 1 of inductance coil disk L3；Insulated gate bipolar transistor
The emitter of IGBT1 is connect through the second protective resistor RC with the cathode of DC power supply 200.The outer end of inductance coil disk L3 is hanging
Or connect with the middle ends of inductance coil disk L3, as shown in Figures 2 and 3.The both ends of resonant capacitor C4 are separately connected inductance
The inner end of coil panel L3 and middle ends.
Further, further, DC power supply 200 includes AC power source and rectifier U1；AC power source has firewire
ACL and zero curve ACN, firewire ACL and zero curve ACN are separately connected two input terminals of rectifier U1；Firewire ACL and rectifier U1 it
Between be provided with fuse FUSE.Anode of the output cathode of rectifier U1 as DC power supply 200, the output negative pole of rectifier U1
Cathode as DC power supply 200.
Further, the filtering of the first protective resistor RZ and first is parallel between two input terminals of rectifier U1 respectively
Capacitor C1.
The output cathode of rectifier U1 is connect through core inductances L1 with the middle ends of inductance coil disk L3.
Further, energy-storage capacitor C3 is connected between the output cathode and output negative pole of rectifier U1.Rectifier U1
Output cathode be followed by the transmitting of edge grid bipolar transistor IGBT 1 through the second filter condenser C2 again after core inductances L1
Pole.The emitter of edge grid bipolar transistor IGBT 1 is grounded.
Second embodiment
As shown in Figure 4 and Figure 5, Fig. 4 shows a kind of circuit diagram of electromagnetic heating apparatus of second embodiment of the invention.Figure
5 show the circuit diagram of another electromagnetic heating apparatus of second embodiment of the invention.The electromagnetic heating apparatus include for
Alternating magnetic field is generated when energization so that the inductance coil disk L3 and the inductance that the conductor product in the alternating magnetic field generates heat
Coil panel L3 connection is to be used to form resonant capacitor C4, the DC power supply 200, insulated gate bipolar transistor of LC resonance circuit
IGBT1 and control circuit 100；The collection of inductance coil disk L3, DC power supply 200 and insulated gate bipolar transistor IGBT 1
Electrode and emitter form heating circuit；The grid of control circuit 100 and insulated gate bipolar transistor IGBT 1 is electrically connected,
Impulse wave is provided for the grid to insulated gate bipolar transistor IGBT 1 to realize that insulated gate bipolar transistor IGBT 1 is led
Logical and cut-off alternating.In this way, the cooperation of insulated gate bipolar transistor IGBT 1 and LC resonance circuit can be in heating circuit
Middle generation alternating current, the alternating current flow through inductance coil disk L3, and inductance coil disk L3 can be made to generate alternating magnetic field.Further
Ground, conductor product are usually the metal parts on canister or nonmetallic vessel.When conductor product is in alternating magnetic field
When, conductor product inside can generate induced current, which can generate heat, to realize electromagnetic heating.
Further, in the present embodiment, inductance coil disk L3 by inner end and between inner end and outer end in
Portion is terminated into the heating circuit.Specifically, as shown in figure 4, the anode of DC power supply 200 and the inner end of inductance coil disk L3 connect
It connects, the collector of the middle part termination insulated gate bipolar transistor IGBT 1 of inductance coil disk L3；Insulated gate bipolar transistor
The emitter of IGBT1 is connect through the second protective resistor RC with the cathode of DC power supply 200.The outer end of inductance coil disk L3 is hanging
Or it is connect with the middle ends of inductance coil disk L3.The both ends of resonant capacitor C4 be separately connected inductance coil disk L3 inner end and
Middle ends.
Further, further, DC power supply 200 includes AC power source and rectifier U1；AC power source has firewire
ACL and zero curve ACN, firewire ACL and zero curve ACN are separately connected two input terminals of rectifier U1；Firewire ACL and rectifier U1 it
Between be provided with fuse FUSE.Anode of the output cathode of rectifier U1 as DC power supply 200, the output negative pole of rectifier U1
Cathode as DC power supply 200.
Further, the filtering of the first protective resistor RZ and first is parallel between two input terminals of rectifier U1 respectively
Capacitor C1.
The output cathode of rectifier U1 is connect through core inductances L1 with the inner end of inductance coil disk L3.
Further, energy-storage capacitor C3 is connected between the output cathode and output negative pole of rectifier U1.Rectifier U1
Output cathode be followed by the transmitting of edge grid bipolar transistor IGBT 1 through the second filter condenser C2 again after core inductances L1
Pole.The emitter of edge grid bipolar transistor IGBT 1 is grounded.
Electromagnetic heating apparatus of the invention accesses the heating by using by the middle ends of inductance coil disk L3 and inner end
Circuit, and the outer end of inductance coil disk is made not access heating circuit, so that the outer ring of inductance coil disk becomes a shielding
Ring, for shielding electromagnetic interference, and the shading ring is linked into electromagnetic heating mainboard, moreover it is possible to be absorbed interference, passed through master
Plate consumes the interference, is based on this two o'clock, has the function that reduce EMC interference.It is appreciated that inductance coil disk L3 can be with
By replacing position with resonant capacitor C4, specifically its inner end or middle ends are connect with the cathode of DC power supply 200, Lai Shixian
Access the purpose of heating circuit.These technical solutions all cover in inductance coil disk L3 by inner end and positioned at inner end and outer end
Between middle ends access under described this technical idea of heating circuit.Therefore, the design of electromagnetic heating apparatus of the invention
It is ingenious, it is practical.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of electromagnetic heating apparatus, including for generating alternating magnetic field when being powered so as to be in the conductor in the alternating magnetic field
The inductance coil disk (L3) of product fever is connect to be used to form the resonance of LC resonance circuit electricity with the inductance coil disk (L3)
Container (C4), DC power supply (200), insulated gate bipolar transistor (IGBT1) and control circuit (100)；Inductance coil disk
(L3), the collector and emitter of DC power supply (200) and insulated gate bipolar transistor (IGBT1), which connects to be formed, heats back
Road；The grid of control circuit (100) and insulated gate bipolar transistor (IGBT1) are electrically connected, for insulated gate bipolar
The grid of transistor (IGBT1) provides impulse wave to realize the alternating of insulated gate bipolar transistor (IGBT1) on and off,
It is characterized in that, inductance coil disk (L3) accesses described heat back by inner end and the middle ends between inner end and outer end
Road；The both ends of resonant capacitor (C4) are separately connected inner end and the middle ends of inductance coil disk (L3).
2. electromagnetic heating apparatus according to claim 1, which is characterized in that the anode and inductor wire of DC power supply (200)
Enclose the middle ends connection of disk (L3), the collector of the interior termination insulated gate bipolar transistor (IGBT1) of inductance coil disk (L3)；
The emitter of insulated gate bipolar transistor (IGBT1) connects through the cathode of the second protective resistor (RC) and DC power supply (200)
It connects；The outer end of inductance coil disk (L3) is hanging or connect with the middle ends of inductance coil disk (L3).
3. electromagnetic heating apparatus according to claim 1, which is characterized in that the anode and inductor wire of DC power supply (200)
Enclose the inner end connection of disk (L3), the collector of middle part termination insulated gate bipolar transistor (IGBT1) of inductance coil disk (L3)；
The emitter of insulated gate bipolar transistor (IGBT1) connects through the cathode of the second protective resistor (RC) and DC power supply (200)
It connects；The outer end of inductance coil disk (L3) is hanging or connect with the middle ends of inductance coil disk (L3).
4. electromagnetic heating apparatus according to claim 2 or 3, which is characterized in that DC power supply (200) includes AC power source
With rectifier (U1)；AC power source has firewire (ACL) and zero curve (ACN), and firewire (ACL) and zero curve (ACN) are separately connected whole
Flow two input terminals of device (U1)；Anode of the output cathode of rectifier (U1) as DC power supply (200), rectifier (U1)
Cathode of the output negative pole as DC power supply (200).
5. electromagnetic heating apparatus according to claim 4, which is characterized in that set between firewire (ACL) and rectifier (U1)
It is equipped with fuse (FUSE).
6. electromagnetic heating apparatus according to claim 4, which is characterized in that divide between two input terminals of rectifier (U1)
It is not parallel with the first protective resistor (RZ) and the first filter condenser (C1).
7. electromagnetic heating apparatus according to claim 4, which is characterized in that the output cathode of rectifier (U1) is through iron core electricity
Sensor (L1) is connect with inductance coil disk (L3).
8. electromagnetic heating apparatus according to claim 4, which is characterized in that the output cathode of rectifier (U1) and output are negative
Energy-storage capacitor (C3) is connected between pole.
9. electromagnetic heating apparatus according to claim 4, which is characterized in that the output cathode of rectifier (U1) is through iron core electricity
It is followed by the emitter of edge grid bipolar junction transistor (IGBT1) after sensor (L1) through the second filter condenser (C2) again；Edge grid are bipolar
The emitter of transistor npn npn (IGBT1) is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810396919.5A CN110401995A (en) | 2018-04-25 | 2018-04-25 | A kind of electromagnetic heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810396919.5A CN110401995A (en) | 2018-04-25 | 2018-04-25 | A kind of electromagnetic heating apparatus |
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| Publication Number | Publication Date |
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| CN110401995A true CN110401995A (en) | 2019-11-01 |
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| CN201810396919.5A Pending CN110401995A (en) | 2018-04-25 | 2018-04-25 | A kind of electromagnetic heating apparatus |
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| JP2003297542A (en) * | 2002-04-02 | 2003-10-17 | Canon Inc | Resonance type induction heating device and fixing device |
| CN2797928Y (en) * | 2004-12-17 | 2006-07-19 | 朱正昌 | Double electromagnetic short-circuit loop type electromagnetic oven |
| JP2007311244A (en) * | 2006-05-19 | 2007-11-29 | Mitsubishi Electric Corp | Induction-heating cooker |
| CN104155622A (en) * | 2014-08-26 | 2014-11-19 | 国家电网公司 | Planar radio frequency coil for nuclear magnetic resonance |
| CN206379725U (en) * | 2016-11-18 | 2017-08-04 | 佛山市顺德区美的电热电器制造有限公司 | Filter circuit, Electromagnetic Heating Household appliance control circuit and household electrical appliance |
| CN107027204A (en) * | 2016-02-02 | 2017-08-08 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit and low-power method for heating and controlling |
| CN208258122U (en) * | 2018-04-25 | 2018-12-18 | 深圳市鑫汇科股份有限公司 | A kind of electromagnetic heating apparatus |
-
2018
- 2018-04-25 CN CN201810396919.5A patent/CN110401995A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003297542A (en) * | 2002-04-02 | 2003-10-17 | Canon Inc | Resonance type induction heating device and fixing device |
| CN2797928Y (en) * | 2004-12-17 | 2006-07-19 | 朱正昌 | Double electromagnetic short-circuit loop type electromagnetic oven |
| JP2007311244A (en) * | 2006-05-19 | 2007-11-29 | Mitsubishi Electric Corp | Induction-heating cooker |
| CN104155622A (en) * | 2014-08-26 | 2014-11-19 | 国家电网公司 | Planar radio frequency coil for nuclear magnetic resonance |
| CN107027204A (en) * | 2016-02-02 | 2017-08-08 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit and low-power method for heating and controlling |
| CN206379725U (en) * | 2016-11-18 | 2017-08-04 | 佛山市顺德区美的电热电器制造有限公司 | Filter circuit, Electromagnetic Heating Household appliance control circuit and household electrical appliance |
| CN208258122U (en) * | 2018-04-25 | 2018-12-18 | 深圳市鑫汇科股份有限公司 | A kind of electromagnetic heating apparatus |
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