CN106162967A - Electromagnetic heater and resonance circuit - Google Patents
Electromagnetic heater and resonance circuit Download PDFInfo
- Publication number
- CN106162967A CN106162967A CN201510164346.XA CN201510164346A CN106162967A CN 106162967 A CN106162967 A CN 106162967A CN 201510164346 A CN201510164346 A CN 201510164346A CN 106162967 A CN106162967 A CN 106162967A
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- Prior art keywords
- electromagnetic heater
- permutator
- tube
- resonance coil
- resonant
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Classifications
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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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses the resonance circuit of a kind of electromagnetic heater, including: R-T tube, the grounded emitter of R-T tube；Resonant capacitance, resonant capacitance is connected in parallel between the emitter stage of R-T tube and colelctor electrode；Main resonance coil；N number of auxiliary resonance coil and N number of permutator, N number of auxiliary resonance coil is connected in parallel with each other to constitute N number of parallel branch again with N number of permutator one_to_one corresponding after connecting, N number of parallel branch is connected with the colelctor electrode of R-T tube after being connected with main resonance coils from parallel connection of coils；Controller, controller is connected with the control end of each permutator respectively, and controller, by controlling the quantity that N number of permutator participates in the auxiliary resonance coil of resonant operational with control, to change the resonant inductance value of electromagnetic heater, and then changes resonant frequency.The resonance circuit of this electromagnetic heater can change the resonant frequency of electromagnetic heater, reduces leading voltage when R-T tube is opened, and reduces the temperature rise of R-T tube.Invention additionally discloses a kind of electromagnetic heater.
Description
Technical field
The present invention relates to electromagnetic heating technique field, resonance circuit and one particularly to a kind of electromagnetic heater have
The electromagnetic heater of this resonance circuit.
Background technology
At present, single IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) EMR electromagnetic resonance electricity
Road typically uses parallel resonance mode, and it uses when operating in the resonant parameter realized under high-power premise, if the lowest
Power section runs, then occur the problem that
(1) IGBT is the most open-minded, opens moment IGBT transient current peak value high, is well over IGBT current peak specification
Limit, thus damage IGBT；
(2) IGBT heating is serious, need to strengthen to IGBT heat radiation (as increased fin, increasing rotation speed of fan etc.) with
Realize the temperature increase requirement of IGBT.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, it is an object of the present invention to propose the resonance circuit of a kind of electromagnetic heater, it is possible to change Electromagnetic Heating
The resonant frequency of device, reduces leading voltage when R-T tube is opened, and reduces the temperature rise of R-T tube.
Further object is that a kind of electromagnetic heater of proposition.
For reaching above-mentioned purpose, the resonance circuit of a kind of electromagnetic heater that the embodiment of the present invention proposes, including: resonance is opened
Guan Guan, the grounded emitter of described R-T tube；Resonant capacitance, described resonant capacitance is connected in parallel on described R-T tube
Between emitter stage and colelctor electrode；Main resonance coil；N number of auxiliary resonance coil and N number of permutator, described N number of auxiliary resonance line
Circle is connected in parallel with each other to constitute N number of parallel branch after connecting with described N number of permutator one_to_one corresponding again, described N number of also
Connection branch road is connected with the colelctor electrode of described R-T tube after being connected with described main resonance coils from parallel connection of coils, and wherein, N is for being more than
In the integer of 1；Controller, described controller control end with each described permutator respectively is connected, and described controller leads to
Cross the quantity controlling described N number of permutator to control to participate in the auxiliary resonance coil of resonant operational, to change described Electromagnetic Heating
The resonant inductance value of device.
The resonance circuit of electromagnetic heater according to embodiments of the present invention, controller is by controlling N number of resonant switch to control
Participate in the quantity of auxiliary resonance coil of resonant operational, and carry out the resonance coil of resonant operational finally with R-T tube
Colelctor electrode is connected, and resonant capacitance is connected in parallel between the emitter stage of R-T tube and colelctor electrode, therefore, and the embodiment of the present invention
The resonance circuit of electromagnetic heater uses series resonance mode to carry out resonant operational, by controlling the auxiliary humorous of participation resonant operational
The quantity of coil of shaking is to change resonant inductance sensibility reciprocal value, when resonant inductance sensibility reciprocal value increases, it is possible to reduces resonance well and opens
Close leading voltage when pipe is opened and reduce the temperature rise of R-T tube, it is to avoid R-T tube damages so that circuit can be pacified
Entirely, reliably work.Further, the quantity by changing the auxiliary resonance coil participating in resonant operational changes resonant inductance sensibility reciprocal
Value, also can change the resonant inductance value of electromagnetic heater, and then change the resonant frequency of electromagnetic heater to realize electromagnetism
Heater continuous low power heats, and has widened the heating power scope of electromagnetic heater.
According to one embodiment of present invention, as N=1, described N number of auxiliary resonance coil is the first auxiliary resonance coil, described
N number of permutator is the first permutator.
Wherein, when described first permutator Guan Bi, after described main resonance coil and described first auxiliary resonance coil parallel connection again
Carry out resonant operational, so that described electromagnetic heater carries out high power heating；When described first permutator disconnects, institute
State main resonance coil and individually carry out resonant operational, so that described electromagnetic heater carries out low-power heating.
In some embodiments of the invention, described permutator can be relay, metal-oxide-semiconductor, controllable silicon or IGBT.
According to one embodiment of present invention, described R-T tube can be IGBT.
Additionally, embodiments of the invention also proposed a kind of electromagnetic heater, it includes the humorous of above-mentioned electromagnetic heater
Shake circuit.
The electromagnetic heater of the embodiment of the present invention, uses series resonance mode to carry out resonance heating work, wherein by controlling
The quantity of the auxiliary resonance coil of participation resonant operational is to change resonant inductance sensibility reciprocal value, when resonant inductance sensibility reciprocal value increases, and energy
Enough leading voltages reduced well when R-T tube is opened and the temperature rise of reduction R-T tube, it is to avoid R-T tube damages
Bad so that circuit can reliably and securely work.Further, by changing the quantity of the auxiliary resonance coil participating in resonant operational
Change resonant inductance sensibility reciprocal value, also can change the resonant frequency of electromagnetic heater, the lowest to realize electromagnetic heater
Power heats, and has widened the heating power scope of electromagnetic heater.
Wherein, described electromagnetic heater can include electromagnetic rice cooker, prevention electromagnetic pressure cooker and electromagnetic oven.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the resonance circuit of the electromagnetic heater according to the embodiment of the present invention；
The electricity of the resonance circuit of electromagnetic heater when Fig. 2 is the first permutator S1 Guan Bi according to one embodiment of the invention
Lu Tu；And
The electricity of the resonance circuit of electromagnetic heater when Fig. 3 is the first permutator S1 disconnection according to one embodiment of the invention
Lu Tu.
Reference:
R-T tube 10, resonant capacitance C1, main resonance coil Lm, N number of auxiliary resonance coil L1, L2 ..., Ln,
N number of permutator S1, S2 ..., Sn, controller 20；
Filter inductance L0, filter capacitor C0；
Resonance circuit 100, filtration module 200.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings describe the resonance circuit of the electromagnetic heater that the embodiment of the present invention proposes and there is this resonance circuit
Electromagnetic heater.
Fig. 1 is the circuit diagram of the resonance circuit of the electromagnetic heater according to the embodiment of the present invention.As it is shown in figure 1, this electromagnetism
The resonance circuit 100 of heater includes: R-T tube 10, resonant capacitance C1, main resonance coil Lm, N number of auxiliary humorous
Shake coil L1, L2, L3 ..., Ln, N number of permutator S1, S2, S3 ..., Sn, and controller 20.
Wherein, N is the integer more than or equal to 1
As it is shown in figure 1, the grounded emitter of R-T tube 10, resonant capacitance C1 is connected in parallel on sending out of R-T tube 10
Between emitter-base bandgap grading and colelctor electrode.N number of auxiliary resonance coil L1, L2, L3 ..., Ln and N number of permutator S1, S2, S3 ...,
It is connected in parallel with each other again to constitute N number of parallel branch after the series connection of Sn one_to_one corresponding, this N number of parallel branch and main resonance coil
Lm is connected with the colelctor electrode of R-T tube 10 after being connected in parallel.Controller 20 respectively with the control end phase of each permutator
Even, controller 20 is by controlling N number of permutator S1, S2, S3 ..., Sn to control to participate in the auxiliary humorous of resonant operational
Shake the quantity of coil, to change the resonant inductance value of electromagnetic heater, thus change resonant frequency further.Wherein, main
Resonance coil and auxiliary resonance coil are typically coil panel.
According to one embodiment of present invention, as shown in Figure 1, Figure 2 or shown in Fig. 3, R-T tube 10 can be IGBT.
So, the resonance circuit of the electromagnetic heater of the embodiment of the present invention by by parallel for resonant capacitance C1 with IGBT, from
And constitute the mode of series resonance.
Specifically, as shown in Figure 2 or Figure 3, as N=1, N number of auxiliary resonance coil is the first auxiliary resonance coil L1, N number of
Permutator is the first permutator S1.
Wherein, as shown in Figure 2 or Figure 3, the first permutator S1 and the first auxiliary resonance coil L1 is connected in series to constitute
One parallel branch, this parallel branch is connected in parallel with main resonance coil Lm.When the first permutator S1 Guan Bi, first
Carry out resonant operational again after auxiliary resonance coil L1 and main resonance coil Lm parallel connection, add so that electromagnetic heater carries out high power
Heat, the most as shown in Figure 2；When the first permutator S disconnects, main resonance coil Lm individually carries out resonant operational, with
Electromagnetic heater is made to carry out low-power heating, the most as shown in Figure 3.
It is to say, by the disconnection and the Guan Bi that control the first permutator S1, the resonant inductance that resonance circuit runs can be changed
Value.When the first permutator S1 Guan Bi, L1 and Lm parallel connection participates in resonance, as shown in Figure 2；When the first permutator
When S1 disconnects, L1 is in off state, is not involved in the operation of resonance circuit, and Lm participates individually in the resonance of circuit, such as Fig. 3
Shown in.Therefore, when the first permutator S1 Guan Bi, L1 and Lm parallel connection participates in resonance, resonance circuit can be made to run
At high power state, i.e. electromagnetic heater carries out high power heating；When the first permutator S1 disconnects, Lm individually joins
With resonance, the inductance value carrying out resonance increases, and can reduce leading voltage when IGBT opens well, reduces IGBT temperature rise,
Resonance circuit can be made to operate in low power state, i.e. electromagnetic heater carries out low-power heating, thus can widen electromagnetism and add
The heating power scope of thermal.
Specifically, in an example of the present invention, when heating power is less than or equal to 1000W, electromagnetic heater
Main control chip i.e. controller 20 is defaulted as low power state, is otherwise high power state.When user operation electromagnetic heater is transported
During row certain high-power (such as 2000W) heating, main control chip controls the first permutator S1 Guan Bi, and resonance circuit is with L1
The mode participating in resonance is run with connecting with resonant capacitance C1 after Lm parallel connection.When user operation electromagnetic heater, to run certain little
During power (such as 500W) heating, main control chip controls the first permutator S1 and disconnects, and resonance circuit is with Lm and C1
Series connection participates in the mode of resonance and runs.
Wherein, as shown in Figure 1, Figure 2 or shown in Fig. 3, electromagnetic heater also includes by filter inductance L0 and filter capacitor C0
The filtration module 200 constituted, processes for the power supply of 310V is filtered voltage stabilizing.
In an embodiment of the present invention, permutator is powerful relay, metal-oxide-semiconductor, controllable silicon or IGBT.
In sum, the resonance circuit of the electromagnetic heater of the embodiment of the present invention, by changing its topological structure, changes resonance
Mode, and the quantity of the auxiliary resonance coil participating in resonance can be changed by controlling the closed and disconnected of permutator, to change
The sensibility reciprocal value of resonant inductance, thus change the resonant frequency of electromagnetic heater.
The resonance circuit of electromagnetic heater according to embodiments of the present invention, controller is by controlling N number of resonant switch to control
Participate in the quantity of auxiliary resonance coil of resonant operational, and carry out the resonance coil of resonant operational finally with R-T tube
Colelctor electrode is connected, and resonant capacitance is connected in parallel between the emitter stage of R-T tube and colelctor electrode, therefore, and the embodiment of the present invention
The resonance circuit of electromagnetic heater uses series resonance mode to carry out resonant operational, by controlling the auxiliary humorous of participation resonant operational
The quantity of coil of shaking is to change resonant inductance sensibility reciprocal value, when resonant inductance sensibility reciprocal value increases, it is possible to reduces resonance well and opens
Close leading voltage when pipe is opened and reduce the temperature rise of R-T tube, it is to avoid R-T tube damages so that circuit can be pacified
Entirely, reliably work.Further, the quantity by changing the auxiliary resonance coil participating in resonant operational changes resonant inductance sensibility reciprocal
Value, also can change the resonant frequency of electromagnetic heater, to realize the heating of electromagnetic heater continuous low power, has widened electricity
The heating power scope of magnetic heater.
Additionally, embodiments of the invention also proposed a kind of electromagnetic heater, it includes the humorous of above-mentioned electromagnetic heater
Shake circuit.
Wherein, this electromagnetic heater can include electromagnetic rice cooker, prevention electromagnetic pressure cooker and electromagnetic oven.
The electromagnetic heater of the embodiment of the present invention, uses series resonance mode to carry out resonance heating work, wherein by controlling
The quantity of the auxiliary resonance coil of participation resonant operational is to change resonant inductance sensibility reciprocal value, when resonant inductance sensibility reciprocal value increases, and energy
Enough leading voltages reduced well when R-T tube is opened and the temperature rise of reduction R-T tube, it is to avoid R-T tube damages
Bad so that circuit can reliably and securely work.Further, by changing the quantity of the auxiliary resonance coil participating in resonant operational
Change resonant inductance sensibility reciprocal value, also can change the resonant frequency of electromagnetic heater, the lowest to realize electromagnetic heater
Power heats, and has widened the heating power scope of electromagnetic heater.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.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 arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
The implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden
At least one this feature is included containing ground.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In flow chart or at this, any process described otherwise above or method description are construed as, and represent and include one
Or the module of code, fragment or the part of the executable instruction of the more step for realizing specific logical function or process,
And the scope of the preferred embodiment of the present invention includes other realization, wherein can not press order that is shown or that discuss,
Including according to involved function by basic mode simultaneously or in the opposite order, performing function, this should be by the present invention's
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or the logic described otherwise above at this and/or step, for example, it is possible to be considered as reality
The sequencing list of the executable instruction of existing logic function, may be embodied in any computer-readable medium, for instruction
Execution system, device or equipment (system such as computer based system, including processor or other can perform from instruction
System, device or equipment instruction fetch also perform the system instructed) use, or combine these instruction execution systems, device or set
Standby and use.For the purpose of this specification, " computer-readable medium " can be any can to comprise, store, communicate, propagate
Or transmission procedure for instruction execution system, device or equipment or combines these instruction execution systems, device or equipment and uses
Device.The more specifically example (non-exhaustive list) of computer-readable medium includes following: have one or more cloth
The electrical connection section (electronic installation) of line, portable computer diskette box (magnetic device), random access memory (RAM), only
Reading memorizer (ROM), erasable read only memory (EPROM or flash memory) of editing, fiber device, and
Portable optic disk read only memory (CDROM).It addition, computer-readable medium can even is that can print thereon described
The paper of program or other suitable media, because then can carry out such as by paper or other media are carried out optical scanning
Edit, interpret or be processed to electronically obtain described program with other suitable methods if desired, then stored
In computer storage.
Should be appreciated that each several part of the present invention can realize by hardware, software, firmware or combinations thereof.In above-mentioned reality
Execute in mode, software that multiple steps or method in memory and can be performed by suitable instruction execution system with storage or
Firmware realizes.Such as, if realized with hardware, with the most the same, available well known in the art under
Any one or their combination in row technology realize: have the logic gates for data signal realizes logic function
Discrete logic, there is the special IC of suitable combination logic gate circuit, programmable gate array (PGA), existing
Field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is can
Completing instructing relevant hardware by program, described program can be stored in a kind of computer-readable recording medium,
This program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in each embodiment of the present invention can be integrated in a processing module, it is also possible to be each
Individual unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated module was both
Can realize to use the form of hardware, it would however also be possible to employ the form of software function module realizes.If described integrated module with
The form of software function module realizes and as independent production marketing or when using, it is also possible to be stored in a computer-readable
Take in storage medium.
Storage medium mentioned above can be read only memory, disk or CD etc..Although above it has been shown and described that
Embodiments of the invention, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as limitation of the present invention,
Above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (7)
1. the resonance circuit of an electromagnetic heater, it is characterised in that including:
R-T tube, the grounded emitter of described R-T tube；
Resonant capacitance, described resonant capacitance is connected in parallel between emitter stage and the colelctor electrode of described R-T tube；
Main resonance coil；
N number of auxiliary resonance coil and N number of permutator, described N number of auxiliary resonance coil and described N number of permutator one_to_one corresponding
Being connected in parallel with each other to constitute N number of parallel branch after series connection again, described N number of parallel branch is with described main resonance coils from parallel connection of coils even
After connecing, the colelctor electrode with described R-T tube is connected, and wherein, N is the integer more than or equal to 1；
Controller, described controller control end with each described permutator respectively is connected, and described controller is by controlling institute
State the quantity that N number of permutator participates in the auxiliary resonance coil of resonant operational with control, to change the humorous of described electromagnetic heater
Shake inductance value.
2. the resonance circuit of electromagnetic heater as claimed in claim 1, it is characterised in that as N=1, described N
Individual auxiliary resonance coil is the first auxiliary resonance coil, and described N number of permutator is the first permutator.
3. the resonance circuit of electromagnetic heater as claimed in claim 2, it is characterised in that wherein,
When described first permutator Guan Bi, carry out humorous after described main resonance coil and described first auxiliary resonance coil parallel connection again
Shake work, so that described electromagnetic heater carries out high power heating；
When described first permutator disconnects, described main resonance coil individually carries out resonant operational, so that described Electromagnetic Heating
Device carries out low-power heating.
4. the resonance circuit of the electromagnetic heater as according to any one of claim 1-3, it is characterised in that described conversion
Switch is relay, metal-oxide-semiconductor, controllable silicon or IGBT.
5. the resonance circuit of electromagnetic heater as claimed in claim 1, it is characterised in that described R-T tube is
IGBT。
6. an electromagnetic heater, it is characterised in that include the Electromagnetic Heating dress as according to any one of claim 1-5
The resonance circuit put.
7. electromagnetic heater as claimed in claim 6, it is characterised in that described electromagnetic heater includes electromagnetism electricity meal
Pot, prevention electromagnetic pressure cooker and electromagnetic oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510164346.XA CN106162967A (en) | 2015-04-07 | 2015-04-07 | Electromagnetic heater and resonance circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510164346.XA CN106162967A (en) | 2015-04-07 | 2015-04-07 | Electromagnetic heater and resonance circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106162967A true CN106162967A (en) | 2016-11-23 |
Family
ID=57335504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510164346.XA Pending CN106162967A (en) | 2015-04-07 | 2015-04-07 | Electromagnetic heater and resonance circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106162967A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882421A (en) * | 2017-05-11 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Method for heating and controlling, heating control apparatus and electromagnetic heating apparatus |
| CN112952385A (en) * | 2021-01-27 | 2021-06-11 | 维沃移动通信有限公司 | NFC antenna device, control method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203708523U (en) * | 2013-12-20 | 2014-07-09 | 美的集团股份有限公司 | Control circuit for electromagnetic heating device and electromagnetic heating device |
-
2015
- 2015-04-07 CN CN201510164346.XA patent/CN106162967A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203708523U (en) * | 2013-12-20 | 2014-07-09 | 美的集团股份有限公司 | Control circuit for electromagnetic heating device and electromagnetic heating device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882421A (en) * | 2017-05-11 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Method for heating and controlling, heating control apparatus and electromagnetic heating apparatus |
| CN112952385A (en) * | 2021-01-27 | 2021-06-11 | 维沃移动通信有限公司 | NFC antenna device, control method and device |
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Application publication date: 20161123 |