CN106879094A - Electromagnetic heater and its heating control circuit - Google Patents
Electromagnetic heater and its heating control circuit Download PDFInfo
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- CN106879094A CN106879094A CN201510918398.1A CN201510918398A CN106879094A CN 106879094 A CN106879094 A CN 106879094A CN 201510918398 A CN201510918398 A CN 201510918398A CN 106879094 A CN106879094 A CN 106879094A
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- 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
- H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
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Abstract
The invention discloses a kind of heating control circuit of electromagnetic heater and the electromagnetic heater with it, the heating control circuit includes：N number of resonant capacitance；N number of power switch pipe；Selecting switch；N+1 coil panel, any two coil panel in N+1 coil panel is combined by selecting switch, and select one in any two coil panel to participate in resonance by selecting switch, the coil panel of other N-1 coil panel wherein, in N+1 coil panel and the participation resonance of selecting switch selection and N number of resonant capacitance, N number of power switch pipe is corresponding constitutes N number of resonance circuit；Control module, control module is switched by control selections and N number of power switch pipe is to control N number of resonance circuit to be operated in turn.The component that the heating control circuit is used is fewer, and circuit structure is simple, and substantially increases the service life of selecting switch without frequent switching selecting switch during computer heating control.
Description
Technical field
The present invention relates to household electrical appliance technical field, the heating control circuit and one kind of more particularly to a kind of electromagnetic heater
Electromagnetic heater.
Background technology
In the heating circuit structure of multi-coil disk, many IGBT or resonant capacitance are generally all connected with, and when heating electricity
When there is the coil panel of more than three in line structure, relay is also needed to coordinate.For example, there are three in working as heating circuit structure
, it is necessary to three IGBT carry out resonance control to three coil panels respectively during coil panel, while each coil panel is also associated with resonance
Electric capacity so that circuit structure is complicated, the wiring of coil panel is also complicated, and when heating coordinate using relay, by
The service life for causing relay in frequent switching relay is substantially reduced, at the same relay produced in handoff procedure it is larger
Noise.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, one of the invention
Purpose is to propose that a kind of use component is few, the simple electromagnetic heater of circuit structure heating control circuit.
It is another object of the present invention to propose a kind of electromagnetic heater.
To achieve the above object, one aspect of the present invention embodiment proposes a kind of heating control circuit of electromagnetic heater, bag
Include：N number of resonant capacitance, wherein, N is the integer more than 1；N number of power switch pipe；Selecting switch；N+1 coil panel,
Any two coil panel in the N+1 coil panel is combined by the selecting switch, and by the selecting switch
One in any two coil panel is selected to participate in resonance, wherein, other N-1 line in the N+1 coil panel
The coil panel and N number of resonant capacitance, N number of power switch pipe of circle disk and the participation resonance of selecting switch selection
Accordingly constitute N number of resonance circuit；And control module, the control module is by controlling the selecting switch and described N number of
Power switch pipe is operated in turn with controlling N number of resonance circuit.
The heating control circuit of electromagnetic heater according to embodiments of the present invention, can effectively reduce resonance to a certain extent
The use of electric capacity, device for power switching and selecting switch, so that circuit structure is simpler, and causes connecing for coil panel
Line is also simpler, and reduces cost, in addition, selecting switch is only used for selecting a ginseng in any two coil panel
With resonance, and N number of power switch pipe is controlled by control module so that N number of resonance circuit is operated in turn, therefore significantly
The switching times of selecting switch are reduced, the service life of selecting switch is improve.
According to one embodiment of present invention, the selecting switch is relay, the first end of the relay and the electromagnetism
The power supply module of heater is connected, the first coil disk phase in the second end of the relay and any two coil panel
Even, the 3rd end of the relay is connected with the second coil panel in any two coil panel, the control of the relay
End is connected with the control module.
According to one embodiment of present invention, when N is equal to 3, N number of resonant capacitance includes the first resonant capacitance to the
Three resonant capacitances, N number of power switch pipe includes the IGBT of IGBT to the 3rd, and the N+1 coil panel includes the
One coil panel to the 4th coil panel.
According to first embodiment of the invention, one end of the first resonant capacitance is connected with the first end of the relay, described
The other end of the first resonant capacitance is connected by first coil disk with the second end of the relay, first resonant capacitance
C of the other end also with an IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, and described first
The E poles ground connection of IGBT, the G poles of an IGBT are connected with the IGBT driver elements in the control module, the 3rd line
Extremely it is connected with the C of the 2nd IGBT after circle disk and the second resonant capacitance parallel connection, the E poles of the 2nd IGBT are grounded, described the
The G poles of two IGBT are connected with the IGBT driver elements, with the 3rd IGBT after the 4th coil panel is in parallel with the 3rd resonant capacitance
C be extremely connected, the E poles of the 3rd IGBT ground connection, the G poles of the 3rd IGBT are connected with the IGBT driver elements.
Second embodiment of the invention, first coil disk is grounded after being connected with the first resonant capacitance, the first coil
Node between disk and first resonant capacitance is extremely connected with the C of an IGBT, and the C poles of an IGBT are also with
Two coil disk is connected, the E poles of IGBT ground connection, the IGBT in the G poles of an IGBT and the control module
Driver element is connected, tertiary coil disk connected with the second resonant capacitance after ground connection, the tertiary coil disk and second resonance
Node between electric capacity is extremely connected with the C of the 2nd IGBT, the E poles ground connection of the 2nd IGBT, the G of the 2nd IGBT
Pole is connected with the IGBT driver elements, the 4th coil panel connected with the 3rd resonant capacitance after be grounded, the 4th coil panel with
Node between 3rd resonant capacitance is extremely connected with the C of the 3rd IGBT, the E poles ground connection of the 3rd IGBT, described
The G poles of the 3rd IGBT are connected with the IGBT driver elements.
3rd embodiment of the invention, one end of the first resonant capacitance is connected with the first end of the relay, described
The other end of the first resonant capacitance is connected by first coil disk with the second end of the relay, first resonant capacitance
C of the other end also with an IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, and described first
The E poles ground connection of IGBT, the G poles of an IGBT are connected with the IGBT driver elements in the control module, the 3rd line
Extremely it is connected with the C of the 2nd IGBT after circle disk and the second resonant capacitance parallel connection, the E poles of the 2nd IGBT are grounded, described the
The G poles of two IGBT are connected with the IGBT driver elements, and the 4th coil panel is grounded after being connected with the 3rd resonant capacitance, described
Node between 4th coil panel and the 3rd resonant capacitance is extremely connected with the C of the 3rd IGBT, the E of the 3rd IGBT
Pole is grounded, and the G poles of the 3rd IGBT are connected with the IGBT driver elements.
4th embodiment of the invention, first coil disk is grounded after being connected with the first resonant capacitance, the first coil
Node between disk and first resonant capacitance is extremely connected with the C of an IGBT, and the C poles of an IGBT are also with
Two coil disk is connected, the E poles of IGBT ground connection, the IGBT in the G poles of an IGBT and the control module
Driver element is connected, and tertiary coil disk is extremely connected with after the parallel connection of the second resonant capacitance with the C of the 2nd IGBT, the 2nd IGBT
E poles ground connection, the G poles of the 2nd IGBT are connected with the IGBT driver elements, and the 4th coil panel and the 3rd resonance are electric
It is grounded after holding series connection, the 4th coil panel is extremely connected with the node between the 3rd resonant capacitance with the C of the 3rd IGBT,
The E poles ground connection of the 3rd IGBT, the G poles of the 3rd IGBT are connected with the IGBT driver elements.
5th embodiment of the invention, one end of the first resonant capacitance is connected with the first end of the relay, described
The other end of the first resonant capacitance is connected by first coil disk with the second end of the relay, first resonant capacitance
C of the other end also with an IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, and described first
The E poles ground connection of IGBT, the G poles of an IGBT are connected with the IGBT driver elements in the control module, the 3rd line
Circle disk is grounded after being connected with the second resonant capacitance, the node and second between the tertiary coil disk and second resonant capacitance
The C of IGBT is extremely connected, the E poles ground connection of the 2nd IGBT, and the G poles of the 2nd IGBT and the IGBT drive list
Unit is connected, and the 4th coil panel is extremely connected with after the parallel connection of the 3rd resonant capacitance with the C of the 3rd IGBT, the E of the 3rd IGBT
Pole is grounded, and the G poles of the 3rd IGBT are connected with the IGBT driver elements.
According to the sixth embodiment of the present, it is grounded after first coil disk is connected with the first resonant capacitance, the first coil
Node between disk and first resonant capacitance is extremely connected with the C of an IGBT, and the C poles of an IGBT are also with
Two coil disk is connected, the E poles of IGBT ground connection, the IGBT in the G poles of an IGBT and the control module
Driver element is connected, and tertiary coil disk is extremely connected with after the parallel connection of the second resonant capacitance with the C of the 2nd IGBT, the 2nd IGBT
E poles ground connection, the G poles of the 2nd IGBT are connected with the IGBT driver elements, and the 4th coil panel and the 3rd resonance are electric
Extremely be connected with the C of the 3rd IGBT after holding parallel connection, the E poles of the 3rd IGBT are grounded, the G poles of the 3rd IGBT and institute
IGBT driver elements are stated to be connected.
7th embodiment of the invention, one end of the first resonant capacitance is connected with the first end of the relay, described
The other end of the first resonant capacitance is connected by first coil disk with the second end of the relay, first resonant capacitance
C of the other end also with an IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, and described first
The E poles ground connection of IGBT, the G poles of an IGBT are connected with the IGBT driver elements in the control module, the 3rd line
Circle disk is grounded after being connected with the second resonant capacitance, the node and second between the tertiary coil disk and second resonant capacitance
The C of IGBT is extremely connected, the E poles ground connection of the 2nd IGBT, and the G poles of the 2nd IGBT and the IGBT drive list
Unit be connected, the 4th coil panel connected with the 3rd resonant capacitance after ground connection, the 4th coil panel and the 3rd resonant capacitance it
Between node be extremely connected with the C of the 3rd IGBT, the E poles of the 3rd IGBT ground connection, the G poles of the 3rd IGBT and institute
IGBT driver elements are stated to be connected.
8th embodiment of the invention, first coil disk is grounded after being connected with the first resonant capacitance, the first coil
Node between disk and first resonant capacitance is extremely connected with the C of an IGBT, and the C poles of an IGBT are also with
Two coil disk is connected, the E poles of IGBT ground connection, the IGBT in the G poles of an IGBT and the control module
Driver element is connected, tertiary coil disk connected with the second resonant capacitance after ground connection, the tertiary coil disk and second resonance
Node between electric capacity is extremely connected with the C of the 2nd IGBT, the E poles ground connection of the 2nd IGBT, the G of the 2nd IGBT
Pole is connected with the IGBT driver elements, and the 4th coil panel is extremely connected with after the parallel connection of the 3rd resonant capacitance with the C of the 3rd IGBT,
The E poles ground connection of the 3rd IGBT, the G poles of the 3rd IGBT are connected with the IGBT driver elements.
Additionally, embodiments of the invention also proposed a kind of electromagnetic heater, it includes adding for above-mentioned electromagnetic heater
Thermal control circuit.
The electromagnetic heater can effectively reduce resonant capacitance, work(to a certain extent by above-mentioned heating control circuit
The use of rate switching device and selecting switch, so that circuit structure is simpler, and causes the wiring of coil panel also more
Simply, and cost is reduced, in addition, selecting switch is only used for selecting a participation resonance in any two coil panel,
And N number of power switch pipe is controlled so that N number of resonance circuit is operated in turn, therefore greatly reduces choosing by control module
Select the switching times of switch, improve the service life of selecting switch, so improve electromagnetic heater stability and can
By property.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to first embodiment of the invention.
Fig. 2 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to second embodiment of the invention.
Fig. 3 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to third embodiment of the invention.
Fig. 4 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to four embodiment of the invention.
Fig. 5 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to fifth embodiment of the invention.
Fig. 6 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to sixth embodiment of the invention.
Fig. 7 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to seventh embodiment of the invention.
Fig. 8 is the circuit structure diagram of the heating control circuit of the electromagnetic heater according to eighth embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein identical from start to finish
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The heating control circuit and electricity of the electromagnetic heater of proposition according to embodiments of the present invention described with reference to the accompanying drawings
Magnetic heater.
As Figure 1-Figure 8, the heating control circuit of the electromagnetic heater of the embodiment of the present invention includes：N number of resonant capacitance,
N number of power switch pipe, selecting switch REL, N+1 coil panel and control module 10.
Wherein, N is the integer more than 1, and any two coil panel in N+1 coil panel carries out group by selecting switch REL
Close, and a participation resonance in any two coil panel is selected by selecting switch REL, wherein, in N+1 coil panel
Other N-1 coil panel and selecting switch REL selection participation resonance coil panel and N number of resonant capacitance, N number of power
Switching tube accordingly constitutes N number of resonance circuit, and control module 10 switchs REL and N number of power switch pipe to control by control selections
N number of resonance circuit is made to be operated in turn.
Specifically, selecting switch REL is only used for selecting a participation resonance in any two coil panel, in computer heating control
During, control module 10 switchs REL and N number of power switch pipe so that N number of resonance circuit is carried out in turn by control selections
Work.For example, during computer heating control, a coil in the coil panel combined with selecting switch REL is needed to use
During disk, during control module 10 switchs REL so that required coil panel accesses resonance circuit by control selections, then control module
10 are operated to realize heating function in turn by controlling N number of resonance circuit.As long as when needs are combined with selecting switch REL
Coil panel in another coil panel heat when, the ability control selections of control module 10 switch REL switch over, therefore, greatly
The big switching times for reducing selecting switch REL, improve the service life of selecting switch REL, and due to switching times
Greatly reduce, therefore greatly reduce the noise produced during switching.
It should be noted that each coil panel can also split into multiple small coil panels, and multiple small coil panel strings
Connection connection, to realize the function that multiple positions are heated simultaneously.
According to one embodiment of present invention, selecting switch REL is relay, the first end and electromagnetic heater of relay
Power supply module 20 be connected, the second end of relay is connected with the first coil disk in any two coil panel, the of relay
Three ends are connected with the second coil panel in any two coil panel, and the control end of relay is connected with control module 10.Wherein,
Power supply module 20 can include power supply 21 and the LC filter circuits being made up of filter inductance L and filter capacitor C.
According to one embodiment of present invention, when N is equal to 3, N number of resonant capacitance includes the first resonant capacitance to the 3rd resonance
Electric capacity (is designated as C1, C2, C3) successively, N number of power switch pipe include the IGBT of IGBT to the 3rd (be designated as successively IGBT1,
IGBT2, IGBT3), N+1 coil panel includes first coil disk to the 4th coil panel (being designated as L1, L2, L3, L4 successively).
According to first embodiment of the invention, as shown in figure 1, the first end of one end of the first resonant capacitance C1 and relay
It is connected, the other end of the first resonant capacitance C1 is connected by first coil disk L1 with the second end of relay, the first resonance electricity
The other end for holding C1 is also extremely connected with the C of IGBT1, and the C poles of IGBT1 are also connected with the second coil panel L2, the E of IGBT1
Pole is grounded GND, and the G poles of IGBT1 are connected with the IGBT driver elements 11 in control module 10, tertiary coil disk L3 and the
Extremely it is connected with the C of IGBT2 after two resonant capacitance C2 parallel connections, the E poles of IGBT2 are grounded GND, the G poles of IGBT2 and IGBT
Driver element 11 is connected, and the 4th coil panel L4 is extremely connected with after the 3rd resonant capacitance C3 parallel connections with the C of IGBT3, IGBT3
E poles ground connection GND, the G poles of IGBT3 are connected with IGBT driver elements 11.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay,
Now first coil disk L1 is in parallel with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1.Control module 10 is first
Send IGBT1 drive signal to IGBT driver elements 11 to control IGBT1 to be operated, while stop output IGBT2
With the drive signal of IGBT3 so that IGBT2 and IGBT3 is closed, now first coil disk L1 is in parallel humorous with the first electric capacity C1
Shake and heated with to pan bottom.Then control module 10 send IGBT2 drive signal to IGBT driver elements 11 with
Control IGBT2 is operated, while stop the drive signal of output IGBT1 and IGBT3 so that IGBT1 and IGBT3 are closed,
Now tertiary coil disk L3 is heated with the second electric capacity C2 parallel resonances with the side to pan.Again, control module 10
Send IGBT3 drive signal to IGBT driver elements 11 to control IGBT3 to be operated, while stop output IGBT1
With the drive signal of IGBT2 so that IGBT1 and IGBT2 is closed, now the 4th coil panel L4 is in parallel humorous with the 3rd electric capacity C3
Shake and heated with the bottom to pan.Control module 10 is operated in turn according to above-mentioned control mode control resonance circuit.
When the control relay of control module 10 is in closure state, the first end of relay is logical with the 3rd termination of relay,
Now the second coil panel L2 is in parallel with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1.Control module 10 is first
Send IGBT1 drive signal to IGBT driver elements 11 to control IGBT1 to be operated, while stop output IGBT2
With the drive signal of IGBT3 so that IGBT2 and IGBT3 is closed, now the second coil panel L2 is in parallel humorous with the first electric capacity C1
Shake and heated with to pan bottom.Then control module 10 send IGBT2 drive signal to IGBT driver elements 11 with
Control IGBT2 is operated, while stop the drive signal of output IGBT1 and IGBT3 so that IGBT1 and IGBT3 are closed,
Now tertiary coil disk L3 is heated with the second electric capacity C2 parallel resonances with the side to pan.Again, control module 10
Send IGBT3 drive signal to IGBT driver elements 11 to control IGBT3 to be operated, while stop output IGBT1
With the drive signal of IGBT2 so that IGBT1 and IGBT2 is closed, now the 4th coil panel L4 is in parallel humorous with the 3rd electric capacity C3
Shake and heated with the bottom to pan.Control module 10 is operated in turn according to above-mentioned control mode control resonance circuit.
Second embodiment of the invention, as shown in Fig. 2 after first coil disk L1 connects with the first resonant capacitance C1
Ground connection GND, the node between first coil disk L1 and the first resonant capacitance C1 is extremely connected with the C of IGBT1, the C of IGBT1
Pole is also connected with the second coil panel L2, and the E poles of IGBT1 are grounded GND, the IGBT in the G poles of IGBT1 and control module 10
Driver element 11 is connected, and tertiary coil disk L3 is grounded GND after being connected with the second resonant capacitance C2, tertiary coil disk L3 and
Node between second resonant capacitance C2 is extremely connected with the C of IGBT2, the E poles ground connection GND of IGBT2, the G poles of IGBT2
It is connected with IGBT driver elements 11, the 4th coil panel L4 is grounded GND, the 4th coil after being connected with the 3rd resonant capacitance C3
Node between disk L4 and the 3rd resonant capacitance C3 is extremely connected with the C of IGBT3, and the E poles of IGBT3 are grounded GND, IGBT3
G poles be connected with IGBT driver elements 11.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay,
Now first coil disk L1 connects with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1.Control module 10 is first
Control IGBT1 is operated, while control IGBT2 and IGBT3 to close, now first coil disk L1 and the first resonant capacitance
C1 series resonances are heated with to pan bottom.Then the control of control module 10 IGBT2 is operated, while controlling IGBT1
Closed with IGBT3, now tertiary coil disk L3 is heated with the second resonant capacitance C2 series resonances with the side to pan.
Again, the control of control module 10 IGBT3 is operated, while control IGBT1 and IGBT2 to close, now the 4th coil panel
L4 is heated with the 3rd resonant capacitance C3 series resonances with the bottom to pan.Control module 10 is according to above-mentioned control mode
Control resonance circuit is operated in turn.
When the control relay of control module 10 is in closure state, the first end of relay is logical with the 3rd termination of relay,
Now the second coil panel L2 connects with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1.Control module 10 is first
Control IGBT1 is operated, while control IGBT2 and IGBT3 to close, now the second coil panel L2 and the first resonant capacitance
C1 series resonances are heated with to pan bottom.Then the control of control module 10 IGBT2 is operated, while controlling IGBT1
Closed with IGBT3, now tertiary coil disk L3 is heated with the second resonant capacitance C2 series resonances with the side to pan.
Again, the control of control module 10 IGBT3 is operated, while control IGBT1 and IGBT2 to close, now the 4th coil panel
L4 is heated with the 3rd resonant capacitance C3 series resonances with the bottom to pan.Control module 10 is according to above-mentioned control mode
Control resonance circuit is operated in turn.
3rd embodiment of the invention, as shown in figure 3, the first end of one end of the first resonant capacitance C1 and relay
It is connected, the other end of the first resonant capacitance C1 is connected by first coil disk L1 with the second end of relay, the first resonance electricity
The other end for holding C1 is also extremely connected with the C of IGBT1, and the C poles of IGBT1 are also connected with the second coil panel L2, the E of IGBT1
Pole is grounded GND, and the G poles of IGBT1 are connected with the IGBT driver elements 11 in control module 10, tertiary coil disk L3 and the
Extremely it is connected with the C of IGBT2 after two resonant capacitance C2 parallel connections, the E poles of IGBT2 are grounded GND, the G poles of IGBT2 and IGBT
Driver element 11 is connected, and the 4th coil panel L4 is grounded GND after being connected with the 3rd resonant capacitance C3, the 4th coil panel L4 and
Node between 3rd resonant capacitance C3 is extremely connected with the C of IGBT3, the E poles ground connection GND of IGBT3, the G poles of IGBT3
It is connected with IGBT driver elements 11.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.When
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay, and now the
One coil panel L1 is in parallel with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1, and control module 10 is by control
IGBT1, IGBT2 and IGBT3 are so that resonance circuit is operated in turn；When the control relay of control module 10 is in closure
During state, the first end of relay is logical with the 3rd termination of relay, now the second coil panel L2 and the first resonant capacitance C1
Parallel connection, and resonance circuit is constituted with IGBT1, control module 10 is by controlling IGBT1, IGBT2 and IGBT3 so that resonance
Circuit is operated in turn.Specific work process is just no longer elaborated here.
4th embodiment of the invention, as shown in figure 4, after first coil disk L1 connects with the first resonant capacitance C1
Ground connection, the node between first coil disk L1 and the first resonant capacitance C1 is extremely connected with the C of IGBT1, and the C poles of IGBT1 are also
It is connected with the second coil panel L2, the E poles of IGBT1 are grounded GND, and G poles and the IGBT in control module 10 of IGBT1 drive
Moving cell 11 is connected, and tertiary coil disk L3 is extremely connected with after the second resonant capacitance C2 parallel connections with the C of IGBT2, IGBT2's
E poles are grounded GND, and the G poles of IGBT2 are connected with IGBT driver elements 11, the 4th coil panel L4 and the 3rd resonant capacitance C3
GND is grounded after series connection, the node between the 4th coil panel L4 and the 3rd resonant capacitance C3 is extremely connected with the C of IGBT3, IGBT3
E poles ground connection GND, the G poles of IGBT3 are connected with IGBT driver elements 11.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.When
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay, and now the
One coil panel L1 connects with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1, and control module 10 is by control
IGBT1, IGBT2 and IGBT3 are so that resonance circuit is operated in turn；When the control relay of control module 10 is in closure
During state, the first end of relay is logical with the 3rd termination of relay, now the second coil panel L2 and the first resonant capacitance C1
Series connection, and resonance circuit is constituted with IGBT1, control module 10 is by controlling IGBT1, IGBT2 and IGBT3 so that resonance
Circuit is operated in turn.Specific work process is just no longer elaborated here.
5th embodiment of the invention, as shown in figure 5, the first end of one end of the first resonant capacitance C1 and relay
It is connected, the other end of the first resonant capacitance C1 is connected by first coil disk L1 with the second end of relay, the first resonance electricity
The other end for holding C1 is also extremely connected with the C of IGBT1, and the C poles of IGBT1 are also connected with the second coil panel L2, the E of IGBT1
Pole is grounded GND, and the G poles of IGBT1 are connected with the IGBT driver elements 11 in control module 10, tertiary coil disk L3 and the
GND is grounded after two resonant capacitance C2 series connection, the node between tertiary coil disk L3 and the second resonant capacitance C2 is with IGBT2's
C is extremely connected, and the E poles ground connection GND of IGBT2, the G poles of IGBT2 are connected with IGBT driver elements 11, the 4th coil panel L4
Extremely be connected with the C of IGBT3 with after the 3rd resonant capacitance C3 parallel connections, the E poles of IGBT3 ground connection GND, the G poles of IGBT3 and
IGBT driver elements 11 are connected.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.When
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay, and now the
One coil panel L1 is in parallel with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1, and control module 10 is by control
IGBT1, IGBT2 and IGBT3 are so that resonance circuit is operated in turn；When the control relay of control module 10 is in closure
During state, the first end of relay is logical with the 3rd termination of relay, now the second coil panel L2 and the first resonant capacitance C1
Parallel connection, and resonance circuit is constituted with IGBT1, control module 10 is by controlling IGBT1, IGBT2 and IGBT3 so that resonance
Circuit is operated in turn.Specific work process is just no longer elaborated here.
According to the sixth embodiment of the present, as shown in fig. 6, being grounded after first coil disk is connected with the first resonant capacitance,
Node between the first coil disk and first resonant capacitance is extremely connected with the C of an IGBT, an IGBT
C poles be also connected with the second coil panel, the E poles of IGBT ground connection, the G poles of an IGBT and the control
IGBT driver elements in molding block are connected, with the C poles phase of the 2nd IGBT after tertiary coil disk is in parallel with the second resonant capacitance
Even, the E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT are connected with the IGBT driver elements, the 4th line
Extremely it is connected with the C of the 3rd IGBT after circle disk and the 3rd resonant capacitance parallel connection, the E poles of the 3rd IGBT are grounded, described the
The G poles of three IGBT are connected with the IGBT driver elements.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.When
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay, and now the
One coil panel L1 connects with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1, and control module 10 is by control
IGBT1, IGBT2 and IGBT3 are so that resonance circuit is operated in turn；When the control relay of control module 10 is in closure
During state, the first end of relay is logical with the 3rd termination of relay, now the second coil panel L2 and the first resonant capacitance C1
Series connection, and resonance circuit is constituted with IGBT1, control module 10 is by controlling IGBT1, IGBT2 and IGBT3 so that resonance
Circuit is operated in turn.Specific work process is just no longer elaborated here.
7th embodiment of the invention, as shown in fig. 7, the first end of one end of the first resonant capacitance C1 and relay
It is connected, the other end of the first resonant capacitance C1 is connected by first coil disk L1 with the second end of relay, the first resonance electricity
The other end for holding C1 is also extremely connected with the C of IGBT1, and the C poles of IGBT1 are also connected with the second coil panel L2, the E of IGBT1
Pole is grounded GND, and the G poles of IGBT1 are connected with the IGBT driver elements 11 in control module 10, tertiary coil disk L3 and the
GND is grounded after two resonant capacitance C2 series connection, the node between tertiary coil disk L3 and the second resonant capacitance C2 is with IGBT2's
C is extremely connected, and the E poles ground connection GND of IGBT2, the G poles of IGBT2 are connected with IGBT driver elements 11, the 4th coil panel L4
GND, node and IGBT3 between the 4th coil panel L4 and the 3rd resonant capacitance C3 are grounded after being connected with the 3rd resonant capacitance C3
C be extremely connected, the E poles of IGBT3 ground connection GND, the G poles of IGBT3 are connected with IGBT driver elements 11.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.When
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay, and now the
One coil panel L1 is in parallel with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1, and control module 10 is by control
IGBT1, IGBT2 and IGBT3 are so that resonance circuit is operated in turn；When the control relay of control module 10 is in closure
During state, the first end of relay is logical with the 3rd termination of relay, now the second coil panel L2 and the first resonant capacitance C1
Parallel connection, and resonance circuit is constituted with IGBT1, control module 10 is by controlling IGBT1, IGBT2 and IGBT3 so that resonance
Circuit is operated in turn.Specific work process is just no longer elaborated here.
8th embodiment of the invention, as shown in figure 8, after first coil disk L1 connects with the first resonant capacitance C1
Ground connection GND, the node between first coil disk L1 and the first resonant capacitance C1 is extremely connected with the C of IGBT1, the C of IGBT1
Pole is also connected with the second coil panel L2, and the E poles of IGBT1 are grounded GND, the IGBT in the G poles of IGBT1 and control module 10
Driver element 11 is connected, and tertiary coil disk L3 is grounded GND after being connected with the second resonant capacitance C2, tertiary coil disk L3 and
Node between second resonant capacitance C2 is extremely connected with the C of IGBT2, the E poles ground connection GND of IGBT2, the G poles of IGBT2
It is connected with IGBT driver elements 11, the 4th coil panel L4 is extremely connected with after the 3rd resonant capacitance C3 parallel connections with the C of IGBT3,
The E poles ground connection GND of IGBT3, the G poles of IGBT3 are connected with IGBT driver elements 11.
Specifically, when electromagnetic heater is electric cooker, can be by first coil disk L1, the second coil panel L2 and the 4th
Coil panel L4 be used for pan bottom-heated, and by tertiary coil disk L3 be used for pan side heat, control module 10
Relay and power switch pipe IGBT1, IGBT2, IGBT3 are controlled in real time according to the situation of cooking food in pan.When
When the control relay of control module 10 is off, the first end of relay is logical with the second termination of relay, and now the
One coil panel L1 connects with the first resonant capacitance C1, and constitutes resonance circuit with IGBT1, and control module 10 is by control
IGBT1, IGBT2 and IGBT3 are so that resonance circuit is operated in turn；When the control relay of control module 10 is in closure
During state, the first end of relay is logical with the 3rd termination of relay, now the second coil panel L2 and the first resonant capacitance C1
Series connection, and resonance circuit is constituted with IGBT1, control module 10 is by controlling IGBT1, IGBT2 and IGBT3 so that resonance
Circuit is operated in turn.Specific work process is just no longer elaborated here.
To sum up, during electromagnetic heater is heated, because relay does not need frequent movement, but by control
IGBT1, IGBT2 and IBGT3 processed are heated come the coil panel frequent switching for controlling pan bottom, thus greatly extend after
The service life of electrical equipment, and reduce noise when relay switches.In addition, be can be seen that and tradition from Fig. 1-Fig. 8
Multi-coil disk heater circuit compare, reduce the use of relay, resonant capacitance and power switch pipe, circuit structure letter
It is single, and cause that the wiring of coil panel is also very simple.
It should be strongly noted that in an embodiment of the present invention, when the actuating of relay, control module 10 needs first to control
IGBT1, IGBT2 and IGBT3 are closed, to avoid relay from reducing service life because of contact arc discharge.In addition, control module
The IGBT drive signals of 10 outputs can be with independent control IGBT1, IGBT2 and IGBT3, it is also possible to driving IGBT1 work
While control IGBT2 and IGBT3 close, drive IGBT2 work while control IGBT1 and IGBT3 close, with
And control IGBT1 and IGBT2 is closed while driving IGBT3 to work.
The heating control circuit of electromagnetic heater according to embodiments of the present invention, can effectively reduce resonance to a certain extent
The use of electric capacity, device for power switching and selecting switch, so that circuit structure is simpler, and causes connecing for coil panel
Line is also simpler, and reduces cost, in addition, selecting switch is only used for selecting a ginseng in any two coil panel
With resonance, and N number of power switch pipe is controlled by control module so that N number of resonance circuit is operated in turn, therefore significantly
The switching times of selecting switch are reduced, the service life of selecting switch is improve.
Additionally, embodiments of the invention also proposed a kind of electromagnetic heater, it includes adding for above-mentioned electromagnetic heater
Thermal control circuit.
The electromagnetic heater can effectively reduce resonant capacitance, work(to a certain extent by above-mentioned heating control circuit
The use of rate switching device and selecting switch, so that circuit structure is simpler, and causes the wiring of coil panel also more
Simply, and cost is reduced, in addition, selecting switch is only used for selecting a participation resonance in any two coil panel,
And N number of power switch pipe is controlled so that N number of resonance circuit is operated in turn, therefore greatly reduces choosing by control module
Select the switching times of switch, improve the service life of selecting switch, so improve electromagnetic heater stability and can
By property.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ",
" outward ", the orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on
Orientation shown in the drawings or position relationship, are for only for ease of and describe of the invention and simplify description, rather than instruction or hint institute
The device or element of finger must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this hair
Bright limitation.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed
Or implicitly include at least one this feature.In the description of the invention, " multiple " is meant that at least two, such as two
It is individual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation "
Should be interpreted broadly Deng term, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or two interaction relationships of element, unless otherwise clearly restriction.It is common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be as the case may be understood.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or
Oblique upper, or fisrt feature level height is merely representative of higher than second feature.Fisrt feature second feature " under ",
" lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or to be merely representative of first special
Level height is levied less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. mean to combine the specific features of the embodiment or example description, structure, material or
Feature is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be with
Combined in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, ability
The technical staff in domain can enter the feature of the different embodiments or example described in this specification and different embodiments or example
Row is combined and combined.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary,
It is not considered as limiting the invention, one of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, changes, replacing and modification.
Claims (12)
1. a kind of heating control circuit of electromagnetic heater, it is characterised in that including：
N number of resonant capacitance, wherein, N is the integer more than 1；
N number of power switch pipe；
Selecting switch；
N+1 coil panel, any two coil panel in the N+1 coil panel is combined by the selecting switch, and
A participation resonance in any two coil panel is selected by the selecting switch, wherein, the N+1 coil panel
In other N-1 coil panel and the selecting switch selection participation resonance coil panel and N number of resonant capacitance, institute
State N number of power switch pipe and accordingly constitute N number of resonance circuit；And
Control module, the control module is by controlling the selecting switch and N number of power switch pipe to control the N
Individual resonance circuit is operated in turn.
2. the heating control circuit of electromagnetic heater according to claim 1, it is characterised in that the selecting switch
It is relay, the first end of the relay is connected with the power supply module of the electromagnetic heater, the second of the relay
End is connected with the first coil disk in any two coil panel, the 3rd end and any two coil of the relay
The second coil panel in disk is connected, and the control end of the relay is connected with the control module.
3. the heating control circuit of electromagnetic heater according to claim 2, it is characterised in that when N is equal to 3,
N number of resonant capacitance includes the first resonant capacitance to the 3rd resonant capacitance, and N number of power switch pipe includes an IGBT
To the 3rd IGBT, the N+1 coil panel includes first coil disk to the 4th coil panel.
4. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, first is humorous
Shake one end of electric capacity is connected with the first end of the relay, the other end of first resonant capacitance by first coil disk with
Second end of the relay is connected, and the C of the other end of first resonant capacitance also with an IGBT is extremely connected, and described the
The C poles of one IGBT are also connected with the second coil panel, the E poles of IGBT ground connection, the G poles of an IGBT with
IGBT driver elements in the control module are connected, with the 2nd IGBT's after tertiary coil disk is in parallel with the second resonant capacitance
C is extremely connected, and the E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT are connected with the IGBT driver elements,
4th coil panel is extremely connected with after the parallel connection of the 3rd resonant capacitance with the C of the 3rd IGBT, the E poles ground connection of the 3rd IGBT,
The G poles of the 3rd IGBT are connected with the IGBT driver elements.
5. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, First Line
Circle disk is grounded after being connected with the first resonant capacitance, the node and first between the first coil disk and first resonant capacitance
The C of IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, the E poles ground connection of an IGBT,
The G poles of the first IGBT are connected with the IGBT driver elements in the control module, and tertiary coil disk and the second resonance are electric
It is grounded after holding series connection, the node between the tertiary coil disk and second resonant capacitance is extremely connected with the C of the 2nd IGBT,
The E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT are connected with the IGBT driver elements, the 4th coil panel
It is grounded after being connected with the 3rd resonant capacitance, node and the 3rd IGBT between the 4th coil panel and the 3rd resonant capacitance
C be extremely connected, the E poles of the 3rd IGBT ground connection, the G poles of the 3rd IGBT are connected with the IGBT driver elements.
6. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, first is humorous
Shake one end of electric capacity is connected with the first end of the relay, the other end of first resonant capacitance by first coil disk with
Second end of the relay is connected, and the C of the other end of first resonant capacitance also with an IGBT is extremely connected, and described the
The C poles of one IGBT are also connected with the second coil panel, the E poles of IGBT ground connection, the G poles of an IGBT with
IGBT driver elements in the control module are connected, with the 2nd IGBT's after tertiary coil disk is in parallel with the second resonant capacitance
C is extremely connected, and the E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT are connected with the IGBT driver elements,
4th coil panel is grounded after being connected with the 3rd resonant capacitance, the node between the 4th coil panel and the 3rd resonant capacitance
C with the 3rd IGBT is extremely connected, the E poles of the 3rd IGBT ground connection, the G poles of the 3rd IGBT and the IGBT
Driver element is connected.
7. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, First Line
Circle disk is grounded after being connected with the first resonant capacitance, the node and first between the first coil disk and first resonant capacitance
The C of IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, the E poles ground connection of an IGBT,
The G poles of the first IGBT are connected with the IGBT driver elements in the control module, and tertiary coil disk and the second resonance are electric
Extremely be connected with the C of the 2nd IGBT after holding parallel connection, the E poles of the 2nd IGBT are grounded, the G poles of the 2nd IGBT and institute
IGBT driver elements are stated to be connected, the 4th coil panel connected with the 3rd resonant capacitance after ground connection, the 4th coil panel and described the
Node between three resonant capacitances is extremely connected with the C of the 3rd IGBT, the E poles ground connection of the 3rd IGBT, the 3rd IGBT
G poles be connected with the IGBT driver elements.
8. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, first is humorous
Shake one end of electric capacity is connected with the first end of the relay, the other end of first resonant capacitance by first coil disk with
Second end of the relay is connected, and the C of the other end of first resonant capacitance also with an IGBT is extremely connected, and described the
The C poles of one IGBT are also connected with the second coil panel, the E poles of IGBT ground connection, the G poles of an IGBT with
IGBT driver elements in the control module are connected, and tertiary coil disk is grounded after being connected with the second resonant capacitance, and the described 3rd
Node between coil panel and second resonant capacitance is extremely connected with the C of the 2nd IGBT, and the E poles of the 2nd IGBT connect
Ground, the G poles of the 2nd IGBT are connected with the IGBT driver elements, after the 4th coil panel is in parallel with the 3rd resonant capacitance
C with the 3rd IGBT is extremely connected, the E poles of the 3rd IGBT ground connection, the G poles of the 3rd IGBT and the IGBT
Driver element is connected.
9. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, First Line
Circle disk is grounded after being connected with the first resonant capacitance, the node and first between the first coil disk and first resonant capacitance
The C of IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, the E poles ground connection of an IGBT,
The G poles of the first IGBT are connected with the IGBT driver elements in the control module, and tertiary coil disk and the second resonance are electric
Extremely be connected with the C of the 2nd IGBT after holding parallel connection, the E poles of the 2nd IGBT are grounded, the G poles of the 2nd IGBT and institute
State IGBT driver elements to be connected, the 4th coil panel is extremely connected with after the parallel connection of the 3rd resonant capacitance with the C of the 3rd IGBT, described
The E poles ground connection of the 3rd IGBT, the G poles of the 3rd IGBT are connected with the IGBT driver elements.
10. the heating control circuit of electromagnetic heater according to claim 3, it is characterised in that wherein, first
One end of resonant capacitance is connected with the first end of the relay, and the other end of first resonant capacitance passes through first coil disk
It is connected with the second end of the relay, the C of the other end of first resonant capacitance also with an IGBT is extremely connected, described
The C poles of the first IGBT are also connected with the second coil panel, the E poles ground connection of an IGBT, the G poles of an IGBT
It is connected with the IGBT driver elements in the control module, tertiary coil disk is grounded after being connected with the second resonant capacitance, described the
Node between three-winding disk and second resonant capacitance is extremely connected with the C of the 2nd IGBT, the E poles of the 2nd IGBT
Ground connection, the G poles of the 2nd IGBT are connected with the IGBT driver elements, and the 4th coil panel is connected with the 3rd resonant capacitance
After be grounded, the 4th coil panel is extremely connected with the node between the 3rd resonant capacitance with the C of the 3rd IGBT, described
The E poles ground connection of three IGBT, the G poles of the 3rd IGBT are connected with the IGBT driver elements.
The heating control circuit of 11. electromagnetic heaters according to claim 3, it is characterised in that wherein, first
Coil panel is grounded after being connected with the first resonant capacitance, the node between the first coil disk and first resonant capacitance and
The C of one IGBT is extremely connected, and the C poles of an IGBT are also connected with the second coil panel, and the E poles of an IGBT connect
Ground, the G poles of an IGBT are connected with the IGBT driver elements in the control module, and tertiary coil disk is humorous with second
It is grounded after capacitances in series of shaking, the C poles phase of node and the 2nd IGBT between the tertiary coil disk and second resonant capacitance
Even, the E poles ground connection of the 2nd IGBT, the G poles of the 2nd IGBT are connected with the IGBT driver elements, the 4th line
Extremely it is connected with the C of the 3rd IGBT after circle disk and the 3rd resonant capacitance parallel connection, the E poles of the 3rd IGBT are grounded, described the
The G poles of three IGBT are connected with the IGBT driver elements.
12. a kind of electromagnetic heaters, it is characterised in that add including the electromagnetism according to any one of claim 1-11
The heating control circuit of thermal.
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| CN201510918398.1A CN106879094B (en) | 2015-12-11 | 2015-12-11 | Electromagnetic heating device and heating control circuit thereof |
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| CN108966398A (en) * | 2018-07-23 | 2018-12-07 | 珠海格力电器股份有限公司 | Device for inhibiting electromagnetic coupling, control circuit, electric appliance and control method thereof |
| CN109673073A (en) * | 2018-01-17 | 2019-04-23 | 中山市翰林电器有限公司 | A kind of multi-coil disk electromagnetic heating system |
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