CN208258122U - A kind of electromagnetic heating apparatus - Google Patents
A kind of electromagnetic heating apparatus Download PDFInfo
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- CN208258122U CN208258122U CN201820624750.XU CN201820624750U CN208258122U CN 208258122 U CN208258122 U CN 208258122U CN 201820624750 U CN201820624750 U CN 201820624750U CN 208258122 U CN208258122 U CN 208258122U
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- inductance coil
- coil disk
- igbt1
- insulated gate
- gate bipolar
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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).The electromagnetic heating apparatus of the utility model it is ingenious in design, it is practical.
Description
Technical field
The utility model 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.
Utility model content
The purpose of this utility model is in view of the above technical problems, to propose a kind of electromagnetic heating apparatus.
The technical scheme in the invention for solving the technical problem is:
The utility model proposes a kind of electromagnetic heating apparatus, including for generating alternating magnetic field when being powered so as to be in
The inductance coil disk of conductor product fever in the alternating magnetic field is connect to be used to form LC resonance electricity with the inductance coil disk
Resonant capacitor, DC power supply, insulated gate bipolar transistor and the control circuit on road；Inductance coil disk, DC power supply with
And the collector and emitter of insulated gate bipolar transistor connects to form heating circuit；Control circuit and insulated gate bipolar are brilliant
The grid of body pipe is electrically connected, and provides impulse wave for the grid to insulated gate bipolar transistor to realize insulated gate bipolar
The alternating of transistor turns and cut-off, inductance coil disk access institute by inner end and the middle ends between inner end and outer end
State heating circuit；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 utility model, the anode of DC power supply connects with the middle ends of inductance coil disk
It connects, the collector of the interior termination insulated gate bipolar transistor of inductance coil disk；The emitter of insulated gate bipolar transistor passes through
The connection of the cathode of second protective resistor and DC power supply；The outer end of inductance coil disk is hanging or the middle part with inductance coil disk
End connection.
In the above-mentioned electromagnetic heating apparatus of the utility model, the anode of DC power supply is connect with the inner end of inductance coil disk,
The collector of the middle part termination insulated gate bipolar transistor of inductance coil disk；The emitter of insulated gate bipolar transistor is through
The connection of the cathode of two protective resistors and DC power supply；The outer end of inductance coil disk is hanging or the middle ends with inductance coil disk
Connection.
In the above-mentioned electromagnetic heating apparatus of the utility model, DC power supply includes AC power source and rectifier；AC power source
With firewire and zero curve, firewire and zero curve are separately connected two input terminals of rectifier；The output cathode of rectifier is as direct current
The anode of power supply, cathode of the output negative pole of rectifier as DC power supply.
In the above-mentioned electromagnetic heating apparatus of the utility model, fuse is provided between firewire and rectifier.
In the above-mentioned electromagnetic heating apparatus of the utility model, it is parallel with the first guarantor respectively between two input terminals of rectifier
Protect resistor and the first filter condenser.
In the above-mentioned electromagnetic heating apparatus of the utility model, the output cathode of rectifier is through core inductances and inductance coil
Disk connection.
In the above-mentioned electromagnetic heating apparatus of the utility model, storage is connected between the output cathode and output negative pole of rectifier
It can capacitor.
In the above-mentioned electromagnetic heating apparatus of the utility model, the output cathode of rectifier is after core inductances again through second
Filter condenser is followed by the emitter of edge grid bipolar junction transistor；The emitter of edge grid bipolar junction transistor is grounded.
The electromagnetic heating apparatus of the utility model by using will the middle ends of inductance coil disk and inner end access it is described plus
Hot loop, 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 screen
Ring is covered, for shielding electromagnetic interference, and the shading ring is linked into electromagnetic heating mainboard, moreover it is possible to absorb interference, pass through
Mainboard consumes the interference, is based on this two o'clock, has the function that reduce EMC interference.It is appreciated that inductance coil disk can be with
By replacing position with resonant capacitor, specifically the cathode of its inner end or middle ends and DC power supply is connected, to realize access
The purpose of heating circuit.These technical solutions all cover in inductance coil disk by inner end and between inner end and outer end
Middle ends access under described this technical idea of heating circuit.Therefore, the design of the electromagnetic heating apparatus of the utility model is skilful
It is wonderful, it is practical.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, 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 the utility model first embodiment；
Fig. 3 shows the circuit diagram of another electromagnetic heating apparatus of the utility model first embodiment；
Fig. 4 shows a kind of circuit diagram of electromagnetic heating apparatus of the utility model second embodiment；
Fig. 5 shows the circuit diagram of another electromagnetic heating apparatus of the utility model second embodiment.
Specific embodiment
In order to keep the technical purpose, technical solution and technical effect of the utility model apparent, in order to this field
Technical staff understands and implements the utility model, does further in detail to the utility model below in conjunction with the accompanying drawings and the specific embodiments
Thin explanation.
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 filtering of the first protective resistor RZ and first is parallel between two input terminals of rectifier U1 respectively
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 circuits of electromagnetic heating apparatus of the utility model first embodiment
Figure.Fig. 3 shows the circuit diagram of another electromagnetic heating apparatus of the utility model first embodiment.The electromagnetic heating apparatus packet
Include for generate alternating magnetic field when being powered so that the conductor product fever in the alternating magnetic field inductance coil disk L3, with
The inductance coil disk L3 connection is to be used to form resonant capacitor C4, the DC power supply 200, insulated gate bipolar of LC resonance circuit
Transistor npn npn IGBT1 and control circuit 100；Inductance coil disk L3, DC power supply 200 and insulated gate bipolar transistor
The collector and emitter of IGBT1 forms heating circuit；The grid of control circuit 100 and insulated gate bipolar transistor IGBT 1
It is electrically connected, provides impulse wave for the grid to insulated gate bipolar transistor IGBT 1 to realize insulated gate bipolar crystal
The alternating of pipe IGBT1 on and off.In this way, the cooperation of insulated gate bipolar transistor IGBT 1 and LC resonance circuit
Alternating current is generated in heating circuit, which flows through inductance coil disk L3, and inductance coil disk L3 can be made to generate alternation
Magnetic field.Further, conductor product is usually the metal parts on canister or nonmetallic vessel.When conductor product is in
When in alternating magnetic field, induced current can be generated inside conductor product, which can generate heat, to realize that electromagnetism adds
Heat.
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 of electromagnetic heating apparatus of the utility model second embodiment
Figure.Fig. 5 shows the circuit diagram of another electromagnetic heating apparatus of the utility model second embodiment.The electromagnetic heating apparatus packet
Include for generate alternating magnetic field when being powered so that the conductor product fever in the alternating magnetic field inductance coil disk L3, with
The inductance coil disk L3 connection is to be used to form resonant capacitor C4, the DC power supply 200, insulated gate bipolar of LC resonance circuit
Transistor npn npn IGBT1 and control circuit 100；Inductance coil disk L3, DC power supply 200 and insulated gate bipolar transistor
The collector and emitter of IGBT1 forms heating circuit；The grid of control circuit 100 and insulated gate bipolar transistor IGBT 1
It is electrically connected, provides impulse wave for the grid to insulated gate bipolar transistor IGBT 1 to realize insulated gate bipolar crystal
The alternating of pipe IGBT1 on and off.In this way, the cooperation of insulated gate bipolar transistor IGBT 1 and LC resonance circuit
Alternating current is generated in heating circuit, which flows through inductance coil disk L3, and inductance coil disk L3 can be made to generate alternation
Magnetic field.Further, conductor product is usually the metal parts on canister or nonmetallic vessel.When conductor product is in
When in alternating magnetic field, induced current can be generated inside conductor product, which can generate heat, to realize that electromagnetism adds
Heat.
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.
The electromagnetic heating apparatus of the utility model by using will the middle ends of inductance coil disk L3 and inner end access described in
Heating 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 one
Shading ring, for shielding electromagnetic interference, and the shading ring is linked into electromagnetic heating mainboard, moreover it is possible to interference is absorbed, logical
It crosses mainboard to consume the interference, is based on this two o'clock, have the function that reduce EMC interference.It is appreciated that inductance coil disk L3 is also
Its inner end or middle ends can be connect with the cathode of DC power supply 200 specifically, come by replacing position with resonant capacitor C4
Realize the purpose of access heating circuit.These technical solutions all cover inductance coil disk L3 by inner end and be located at inner end and
Middle ends between outer end access under described this technical idea of heating circuit.Therefore, the electromagnetic heating of the utility model is set
Standby is ingenious in design, 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 all should belong to the protection scope of the appended claims for the utility model.
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 |
|---|---|---|---|
| CN201820624750.XU CN208258122U (en) | 2018-04-25 | 2018-04-25 | A kind of electromagnetic heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820624750.XU CN208258122U (en) | 2018-04-25 | 2018-04-25 | A kind of electromagnetic heating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208258122U true CN208258122U (en) | 2018-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820624750.XU Active CN208258122U (en) | 2018-04-25 | 2018-04-25 | A kind of electromagnetic heating apparatus |
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| CN (1) | CN208258122U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401995A (en) * | 2018-04-25 | 2019-11-01 | 深圳市鑫汇科股份有限公司 | A kind of electromagnetic heating apparatus |
-
2018
- 2018-04-25 CN CN201820624750.XU patent/CN208258122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401995A (en) * | 2018-04-25 | 2019-11-01 | 深圳市鑫汇科股份有限公司 | A kind of electromagnetic heating apparatus |
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