CN206620321U - A kind of electromagnetic heating circuit and electromagnetic heater - Google Patents
A kind of electromagnetic heating circuit and electromagnetic heater Download PDFInfo
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- CN206620321U CN206620321U CN201720334012.7U CN201720334012U CN206620321U CN 206620321 U CN206620321 U CN 206620321U CN 201720334012 U CN201720334012 U CN 201720334012U CN 206620321 U CN206620321 U CN 206620321U
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Abstract
The utility model provides a kind of electromagnetic heating circuit and electromagnetic heater, and the electromagnetic heating circuit includes：Power supply, pfc circuit, current rectifying and wave filtering circuit, resonance circuit, on-off circuit and controller；The power supply is connected with the pfc circuit, the pfc circuit is connected with the current rectifying and wave filtering circuit, the current rectifying and wave filtering circuit is connected with the resonance circuit, and the resonance circuit is connected with the on-off circuit, and the controller is connected with the pfc circuit and the on-off circuit respectively；Wherein, the exchange that the pfc circuit and the current rectifying and wave filtering circuit are used to export the power supply is converted to direct current.The utility model can reduce the resonance potential of rear class, while eliminating civil power envelope so that Electromagnetic Heating device is always worked on the basis of galvanic current, so as to improve device reliability.
Description
Technical field
The utility model is related to power control techniques field, more particularly to a kind of electromagnetic heating circuit and Electromagnetic Heating dress
Put.
Background technology
Existing Electromagnetic Heating scheme is as shown in figure 1, electromagnetic heating circuit generally includes the rectification being directly connected to civil power
Bridge, filtering storage capacitor C1001, inductance L1001, storage capacitor C1002, coil panel, the electric capacity C1003 in parallel with coil panel,
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) switch and logic circuit and its
Control centre.However, after the rectified bridge rectification of civil power, be directly connected with the resonance circuit of rear class so that resonance potential is higher,
And civil power envelope causes influence to the job stability of Electromagnetic Heating device.
Therefore, the structure of electromagnetic heating circuit how is designed, is allowed to reduce resonance potential and eliminate civil power envelope to turn into urgently
Technical problem to be solved.
Utility model content
For the defect of prior art, the utility model provides a kind of electromagnetic heating circuit and electromagnetic heater, energy
Enough resonance potentials for solving electromagnetic heating circuit in the prior art are higher and the problem of there is civil power envelope.
In a first aspect, the utility model provides a kind of electromagnetic heating circuit, the electromagnetic heating circuit includes：Power supply,
Pfc circuit, current rectifying and wave filtering circuit, resonance circuit, on-off circuit and controller；
The power supply is connected with the pfc circuit, and the pfc circuit is connected with the current rectifying and wave filtering circuit, the rectification
Filter circuit is connected with the resonance circuit, and the resonance circuit is connected with the on-off circuit, the controller respectively with institute
State pfc circuit and on-off circuit connection；
Wherein, the exchange that the pfc circuit is used to export the power supply is converted to direct current.
Alternatively, the pfc circuit includes：First inductance, first switch pipe, second switch pipe, the first diode and
Two diodes；
The first end of first inductance is connected with the first end of the power supply, the second end of first inductance with it is described
The high level end connection of second switch pipe；
The low level end of the second switch pipe is connected with the low level end of the first switch pipe, the second switch pipe
Control end be connected with the controller；The negative electrode of second diode is connected with the high level end of the second switch pipe,
The anode of second diode is connected with the low level end of the second switch pipe；The high level end of the first switch pipe with
The second end connection of the power supply, the control end of the first switch pipe is connected with the controller；First diode
Negative electrode is connected with the high level end of the first switch pipe, the low electricity of the anode of first diode and the first switch pipe
Flush end is connected；
Second end of first inductance is connected with the first input end of the current rectifying and wave filtering circuit, and the second of the power supply
End is connected with the second input of the current rectifying and wave filtering circuit.
Alternatively, the first switch pipe and the second switch pipe are IGBT or MOSFET.
Alternatively, the current rectifying and wave filtering circuit includes：Rectifier bridge, the first electric capacity, the second inductance and the second electric capacity；
The first input end of the rectifier bridge is connected with the first output end of the pfc circuit, and the second of the rectifier bridge
Input is connected with the second output end of the pfc circuit；First output end of the rectifier bridge respectively with first electric capacity
First end and second inductance first end connection, the second output end of the rectifier bridge respectively with first electric capacity
The first end connection of second end and second electric capacity；Second end of second inductance and the second end of second electric capacity connect
Connect；Second end of second inductance is connected with the resonance circuit, and the first end of second electric capacity is connected to ground.
Alternatively, the rectifier bridge includes：3rd diode, the 4th diode, the 5th diode and the 6th diode；
First output end of the pfc circuit is connected with the anode of the 4th diode, and the second of the pfc circuit is defeated
Go out end to be connected with the negative electrode of the 5th diode；The negative electrode of 4th diode connects with the negative electrode of the 3rd diode
Connect, the anode of the 3rd diode is connected with the negative electrode of the 5th diode, the anode of the 5th diode with it is described
The anode connection of 6th diode, the negative electrode of the 6th diode is connected with the anode of the 4th diode；Described 3rd
The negative electrode of diode is connected with the first end of first electric capacity, and the of the anode of the 6th diode and first electric capacity
Two ends are connected.
Alternatively, the capacitance span of first electric capacity is：100uf~1000uf/500V.
Alternatively, the resonance circuit includes：3rd electric capacity and coil panel；
3rd electric capacity is in parallel with the coil panel；The first end of 3rd electric capacity connects with the current rectifying and wave filtering circuit
Connect, the second end of the 3rd electric capacity is connected with the on-off circuit.
Alternatively, the on-off circuit includes：3rd switching tube；
The control end of 3rd switching tube is connected with the controller, the high level end of the 3rd switching tube with it is described
Resonance circuit is connected, and the low level end of the 3rd switching tube is connected to ground.
Alternatively, the 3rd switching tube is IGBT；
Correspondingly, the gate pole of the 3rd switching tube is connected with the controller, the colelctor electrode of the 3rd switching tube with
The resonance circuit connection, the emitter stage of the 3rd switching tube is connected to ground.
Second aspect, the utility model provides a kind of electromagnetic heater, and the electromagnetic heater includes：As described above
Any one electromagnetic heating circuit.
As shown from the above technical solution, the utility model provides a kind of electromagnetic heating circuit and electromagnetic heater, described
Electromagnetic heating circuit includes：Power supply, pfc circuit, current rectifying and wave filtering circuit, resonance circuit, on-off circuit and controller；Power supply is exported
Exchange be transformed to direct current after pfc circuit and current rectifying and wave filtering circuit, and then input to resonance circuit, to realize circuit resonance.
Pfc circuit enables to the exchange of power input to be changed into direct current in the utility model, so reduces the resonance potential of rear class, together
When eliminate civil power envelope so that Electromagnetic Heating device is always worked on the basis of galvanic current, so as to improve device
Reliability.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these figures.
Fig. 1 is the electrical block diagram of existing electromagnetic heating circuit；
Fig. 2 is the structural representation for the electromagnetic heating circuit that the embodiment of the utility model one is provided；
Fig. 3 is the electrical block diagram for the electromagnetic heating circuit that another embodiment of the utility model is provided；
Fig. 4 is current direction schematic diagram of the electromagnetic heating circuit of another embodiment offer of the utility model in mode 1；
Fig. 5 is current direction schematic diagram of the electromagnetic heating circuit of another embodiment offer of the utility model in mode 2；
Fig. 6 is current direction schematic diagram of the electromagnetic heating circuit of another embodiment offer of the utility model in mode 3；
Fig. 7 is current direction schematic diagram of the electromagnetic heating circuit of another embodiment offer of the utility model in mode 4.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Fig. 2 is a kind of structural representation of electromagnetic heating circuit in the embodiment of the utility model one, the Electromagnetic Heating
Circuit includes：Power supply 1, pfc circuit 2, current rectifying and wave filtering circuit 3, resonance circuit 4, on-off circuit 5 and controller 6.
Wherein, the power supply 1 is connected with the pfc circuit 2, and the pfc circuit 2 is connected with the current rectifying and wave filtering circuit 3,
The current rectifying and wave filtering circuit 3 is connected with the resonance circuit 4, and the resonance circuit 4 is connected with the on-off circuit 5, the control
Device 6 processed is connected with the pfc circuit 2 and the on-off circuit 5 respectively.
Wherein, the exchange that the pfc circuit 2 is used to export the power supply is converted to direct current.
Specifically, the power supply 1 is civil power, and the exchange that pfc circuit 2 and current rectifying and wave filtering circuit 3 export power supply turns
Be changed to direct current, resonance circuit 4 is connected with current rectifying and wave filtering circuit 3, for realizing circuit resonance, and on-off circuit 5 respectively with control
Device 6 and resonance circuit 4 are connected, the working condition for controlling resonance circuit 4.
In the present embodiment, the exchange that power supply 1 is exported is transformed to direct current after pfc circuit 2 and current rectifying and wave filtering circuit 3, and then
Input is to resonance circuit 4, to realize circuit resonance.Pfc circuit 2 enables to the exchange of power input to be changed into straight in the present embodiment
Stream, so reduces the resonance potential of rear class, while eliminating civil power envelope so that Electromagnetic Heating device always works at stabilization
Direct current on the basis of, so as to improve device reliability.
According to one embodiment of the present utility model, as shown in figure 3, the pfc circuit 2 is specifically included：First inductance L1,
First switch pipe Q1, second switch pipe Q2, the first diode D1 and the second diode D2.
As shown in figure 3, the first end of the first inductance L1 is connected with the first end of the power supply 1, first inductance
L1 the second end is connected with the high level end of the second switch pipe Q2；The low level end of the second switch pipe Q2 and described the
One switching tube Q1 low level end connection, the control end of the second switch pipe Q2 is connected with the controller 6；Described 2nd 2
Pole pipe D2 negative electrode is connected with the high level end of the second switch pipe Q2, the anode and described second of the second diode D2
Switching tube Q2 low level end connection；The high level end of the first switch pipe Q1 is connected with the second end of the power supply 1, described
First switch pipe Q1 control end is connected with the controller 6；The negative electrode of the first diode D1 and the first switch pipe
Q1 high level end connection, the anode D1 of first diode is connected with the low level end of the first switch pipe Q1；It is described
First inductance L1 the second end is connected with the first input end of the current rectifying and wave filtering circuit 3, the second end of the power supply 1 with it is described
The second input connection of current rectifying and wave filtering circuit 3.
Wherein, the first end of power supply 1 is connected to civil power live wire, and the second end of power supply 1 is connected to civil power zero line.Inductance L1 is
PFC inductance, magnetic core can be ferrite, iron silicon or iron sial etc..First diode D1 and the second diode D2 is high-frequency rectification two
Pole pipe.
Wherein, the first switch pipe Q1 and second switch pipe Q2 is IGBT or MOSFET.If for example, first opens
It is N-channel MOS FET to close pipe Q1 and second switch pipe Q2, and inductance L1 the second end is connected with second switch pipe Q2 drain electrode, the
Two switching tube Q2 grid is connected with the controller 6, and second switch pipe Q2 source electrode is connected with first switch pipe Q1 source electrode,
First switch pipe Q1 grid is connected with the controller 6, and first switch pipe Q1 drain electrode is connected with the first end of power supply 1.And
Controller exports the first pwm signal PWM1 to first switch pipe Q1 grid, to control first switch pipe Q1 on or off；Control
Device processed exports the second pwm signal PWM2 to second switch pipe Q2 grid, to control second switch pipe Q2 on or off.I.e.
When one switching tube Q1 and second switch pipe Q2 is N-channel MOS FET, first switch pipe Q1 and second switch pipe Q2 high level
End is to drain, and first switch pipe Q1 and second switch pipe Q2 low level end are source electrode.Understandably, first switch pipe Q1
And second switch pipe Q2, when being IGBT, first switch pipe Q1 and second switch pipe Q2 high level end are colelctor electrode, first
Switching tube Q1 and second switch pipe Q2 low level end are emitter stage.
According to one embodiment of the present utility model, as shown in figure 3, the current rectifying and wave filtering circuit 3 is specifically included：Rectification
Bridge, the first electric capacity C1001, the second inductance L1001 and the second electric capacity C1002.
Wherein, the first input end of the rectifier bridge is connected with the first output end of the pfc circuit 2, the rectifier bridge
The second input be connected with the second output end of the pfc circuit 2；First output end of the rectifier bridge is respectively with described
One electric capacity C1001 first end and the connection of the first end of the second inductance L1001, the second output end difference of the rectifier bridge
It is connected with the second end of the first electric capacity C1001 and the first end of the second electric capacity C1002；The second inductance L1001
The second end be connected with the second end of the second electric capacity C1002；The ends of L1001 second of second inductance and resonance electricity
Road 4 is connected, and the first end of the second electric capacity C1002 is connected to ground.
In the present embodiment, the first electric capacity C1001 is used to filter energy storage, and the first electric capacity C1001 type selectings are：100uf~
1000uf/500V specifications.And the second inductance L1001 is connected to resonance circuit 4, it can effectively suppress resonance current to power switch
Percussion, it is to avoid power switch triggers by shorting advance during low-power electromagnetic heating excessively stream, the problems such as cross thermal breakdown,
It is the effect that laser heating can be achieved in electromagnetic heater under low-power, enhances the culinary art effect of electromagnetic heater, carry
Consumer's Experience is risen.Second electric capacity C1002 is in parallel with resonance circuit 4 and on-off circuit 5, for being carried out to the second inductance L1001
Discharge prevention.
Specifically, as shown in figure 3, above-mentioned rectifier bridge is specifically included：3rd diode D3, the 4th diode D4, the five or two
Pole pipe D5 and the 6th diode D6.
Wherein, the first output end of the pfc circuit 2 is connected with the anode of the 4th diode D4, the pfc circuit
2 the second output end is connected with the negative electrode of the 5th diode D5；The negative electrode and the described 3rd 2 of the 4th diode D4
Pole pipe D3 negative electrode connection, the anode of the 3rd diode D3 is connected with the negative electrode of the 5th diode D5, and the described 5th
Diode D5 anode is connected with the anode of the 6th diode D6, the negative electrode and the described 4th 2 of the 6th diode D6
Pole pipe D4 anode connection；The negative electrode of the 3rd diode D3 is connected with the first end of the first electric capacity C1001, and described
Six diode D6 anode is connected with the second end of the first electric capacity C1001.
In the present embodiment, pfc circuit 2 and rectifier bridge combine, and reach that the exchange for exporting power supply 1 is converted into direct current
Purpose.
In addition, as shown in figure 3, controller 6 is except output drive signal to first switch pipe Q1, second switch pipe Q2 and
Outside three switching tube Q3, also it is connected with two output ends of power supply 1, for being sampled to civil power AC；Controller 6 is additionally coupled to
Two output ends of rectifier bridge, for being sampled to PFC outputs；Controller 6 is connected to coil panel two ends, for being to heating
System is sampled.
According to one embodiment of the present utility model, as shown in figure 3, the resonance circuit 4 includes：3rd electric capacity C1003
And coil panel.
Wherein, the 3rd electric capacity C1003 is in parallel with the coil panel；The first end of the 3rd electric capacity C1003 and institute
State current rectifying and wave filtering circuit 2 to connect, the second end of the 3rd electric capacity C1003 is connected with the on-off circuit 5.
According to one embodiment of the present utility model, as shown in figure 3, the on-off circuit 5 includes：3rd switching tube Q3.
Wherein, the control end of the 3rd switching tube Q3 is connected with the controller 6, the height electricity of the 3rd switching tube Q3
Flush end is connected with the resonance circuit 4, and the low level end of the 3rd switching tube Q3 is connected to ground.
For example, the 3rd switching tube Q3 can be IGBT.Correspondingly, the gate pole G of the 3rd switching tube Q3 and institute
State controller 6 to connect, the colelctor electrode C of the 3rd switching tube Q3 is connected with the resonance circuit 4, the 3rd switching tube Q3's
Emitter E is connected to ground.
In the present embodiment, controller 6 exports PWM drive signal to the 3rd switching tube Q3 gate pole, to control the 3rd switch
Pipe Q3 on or off, so as to control the working condition of resonance circuit 4.
Specifically, the operation principle of the electromagnetic heating circuit shown in Fig. 3 is as follows：
When the alternating voltage that power supply 1 is exported is in positive half period, it is divided into two mode：Mode 1 is as shown in figure 4, the 3rd
Diode D3 and the 6th diode D6 cut-offs, the 4th diode D4 and the 5th diode D5 conductings, the electric current that now power supply 1 is exported
For load supplying；Mode 2 is as shown in figure 5, now second switch pipe Q2 is turned on, and first switch pipe Q1 ends, and the first diode
D1 is turned on, then the first inductance L1 energy storage increase.Now the first inductance L1, second switch pipe Q2 and the 4th switching tube D4 are constituted
Boost pfc circuits, then be further filtered energy storage by the first electric capacity C1001, exports the D/C voltage of certain ripple, for
Electromagnetic Heating load is used.
When the alternating voltage that power supply 1 is exported is in negative half-cycle, two mode are also classified into：Mode 3 is as shown in fig. 6,
Three diode D3 and the 6th diode D6 conductings, and the 4th diode D4 and the 5th diode D5 cut-offs, the now output of power supply 1
Electric current is load supplying；Mode 4 is as shown in fig. 7, now first switch pipe Q1 is turned on, and second switch pipe Q2 ends, and the two or two
Pole pipe D2 is turned on, then the first inductance L1 energy storage increase.Now the first inductance L1, first switch pipe Q1 and the 3rd switching tube D3 are constituted
Boost pfc circuits, then be further filtered energy storage by the first electric capacity C1001, exports the D/C voltage of certain ripple, with
Power supply magnetic heating load is used.
In addition, the embodiment of the utility model one provides a kind of electromagnetic heater, the electromagnetic heater includes：Such as
Electromagnetic heating circuit in any of the above-described embodiment.The resonance potential of electromagnetic heating circuit rear class can be reduced, while eliminating city
Electric envelope so that Electromagnetic Heating device is always worked on the basis of galvanic current, so as to improve device reliability.
, it is necessary to explanation in description of the present utility model, the orientation or position relationship of the instruction such as term " on ", " under "
Described based on orientation shown in the drawings or position relationship, to be for only for ease of description the utility model and simplifying, without referring to
Show or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration and operation, therefore can not manage
Solve as to limitation of the present utility model.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " should be done
It broadly understood, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can mechanically connect,
It can also be electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be two element internals
Connection.For the ordinary skill in the art, it can understand above-mentioned term in the utility model as the case may be
Concrete meaning.
It should also be noted that, herein, such as first and second or the like relational terms are used merely to one
Entity or operation make a distinction with another entity or operation, and not necessarily require or imply between these entities or operation
There is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to contain
Lid nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
Above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to foregoing reality
Example is applied the utility model is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and model of each embodiment technical scheme of the utility model
Enclose.
Claims (10)
1. a kind of electromagnetic heating circuit, it is characterised in that the electromagnetic heating circuit includes：Power supply, pfc circuit, rectifying and wave-filtering
Circuit, resonance circuit, on-off circuit and controller；
The power supply is connected with the pfc circuit, and the pfc circuit is connected with the current rectifying and wave filtering circuit, the rectifying and wave-filtering
Circuit is connected with the resonance circuit, and the resonance circuit is connected with the on-off circuit, the controller respectively with the PFC
Circuit and on-off circuit connection；
Wherein, the exchange that the pfc circuit is used to export the power supply is converted to direct current.
2. electromagnetic heating circuit according to claim 1, it is characterised in that the pfc circuit includes：First inductance,
One switching tube, second switch pipe, the first diode and the second diode；
The first end of first inductance is connected with the first end of the power supply, the second end of first inductance and described second
The high level end connection of switching tube；
The low level end of the second switch pipe is connected with the low level end of the first switch pipe, the control of the second switch pipe
End processed is connected with the controller；The negative electrode of second diode is connected with the high level end of the second switch pipe, described
The anode of second diode is connected with the low level end of the second switch pipe；The high level end of the first switch pipe with it is described
The second end connection of power supply, the control end of the first switch pipe is connected with the controller；The negative electrode of first diode
It is connected with the high level end of the first switch pipe, the low level end of the anode of first diode and the first switch pipe
Connection；
Second end of first inductance is connected with the first input end of the current rectifying and wave filtering circuit, the second end of the power supply with
The second input connection of the current rectifying and wave filtering circuit.
3. electromagnetic heating circuit according to claim 2, it is characterised in that the first switch pipe and the second switch
Manage as IGBT or MOSFET.
4. according to electromagnetic heating circuit according to any one of claims 1 to 3, it is characterised in that the current rectifying and wave filtering circuit
Including：Rectifier bridge, the first electric capacity, the second inductance and the second electric capacity；
The first input end of the rectifier bridge is connected with the first output end of the pfc circuit, the second input of the rectifier bridge
End is connected with the second output end of the pfc circuit；First output end of the rectifier bridge respectively with first electric capacity
The first end connection of one end and second inductance, the second output end of the rectifier bridge respectively with first electric capacity second
The first end connection of end and second electric capacity；Second end of second inductance is connected with the second end of second electric capacity；
Second end of second inductance is connected with the resonance circuit, and the first end of second electric capacity is connected to ground.
5. electromagnetic heating circuit according to claim 4, it is characterised in that the rectifier bridge includes：3rd diode,
Four diodes, the 5th diode and the 6th diode；
First output end of the pfc circuit is connected with the anode of the 4th diode, the second output end of the pfc circuit
It is connected with the negative electrode of the 5th diode；The negative electrode of 4th diode is connected with the negative electrode of the 3rd diode, institute
The anode for stating the 3rd diode is connected with the negative electrode of the 5th diode, the anode and the described 6th 2 of the 5th diode
The anode connection of pole pipe, the negative electrode of the 6th diode is connected with the anode of the 4th diode；3rd diode
Negative electrode be connected with the first end of first electric capacity, the second end of the anode of the 6th diode and first electric capacity connects
Connect.
6. electromagnetic heating circuit according to claim 4, it is characterised in that the capacitance span of first electric capacity
For：100uf~1000uf/500V.
7. according to electromagnetic heating circuit according to any one of claims 1 to 3, it is characterised in that the resonance circuit includes：
3rd electric capacity and coil panel；
3rd electric capacity is in parallel with the coil panel；The first end of 3rd electric capacity is connected with the current rectifying and wave filtering circuit,
Second end of the 3rd electric capacity is connected with the on-off circuit.
8. according to electromagnetic heating circuit according to any one of claims 1 to 3, it is characterised in that the on-off circuit includes：
3rd switching tube；
The control end of 3rd switching tube is connected with the controller, high level end and the resonance of the 3rd switching tube
Circuit is connected, and the low level end of the 3rd switching tube is connected to ground.
9. electromagnetic heating circuit according to claim 8, it is characterised in that the 3rd switching tube is IGBT；
Correspondingly, the gate pole of the 3rd switching tube is connected with the controller, the colelctor electrode of the 3rd switching tube with it is described
Resonance circuit is connected, and the emitter stage of the 3rd switching tube is connected to ground.
10. a kind of electromagnetic heater, it is characterised in that the electromagnetic heater includes：It is any in such as claim 1~9
Electromagnetic heating circuit described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720334012.7U CN206620321U (en) | 2017-03-31 | 2017-03-31 | A kind of electromagnetic heating circuit and electromagnetic heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720334012.7U CN206620321U (en) | 2017-03-31 | 2017-03-31 | A kind of electromagnetic heating circuit and electromagnetic heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206620321U true CN206620321U (en) | 2017-11-07 |
Family
ID=60235186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720334012.7U Active CN206620321U (en) | 2017-03-31 | 2017-03-31 | A kind of electromagnetic heating circuit and electromagnetic heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206620321U (en) |
-
2017
- 2017-03-31 CN CN201720334012.7U patent/CN206620321U/en active Active
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