CN104284464B - The control method of many Electromagnetic Heatings unit seamless switching - Google Patents
The control method of many Electromagnetic Heatings unit seamless switching Download PDFInfo
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Abstract
The control method of many Electromagnetic Heatings unit seamless switching.The invention discloses the control method of a kind of electromagnetic heater, it comprises the steps: S1, when described electromagnetic heater works, the voltage of the electric main of input to described electromagnetic heater is carried out zero passage detection to obtain the first detection signal；S2, judges the voltage whether zero passage of described electric main according to described first detection signal；S3, enters interrupt processing when the voltage zero-cross of described electric main；S4, it is judged that it is pre-conditioned whether current time meets, if meeting described pre-conditioned, then the resonance coil of current heating is switched over by the switch that selects controlling described electromagnetic heater.The control method of the present invention controls resonance coil and switches over when line voltage zero passage, it is not necessary to safe time interval, it is achieved the seriality of heating, heats is good, and without again detecting pan, noise is little.
Description
Technical field
The present invention relates to electromagnetic heating technique field, particularly to the controlling party of a kind of electromagnetic heater
Method.
Background technology
How existing electromagnetic oven, during cooking food, is carried out with circle mode of heating completely, and pan heats
Position keeps constant, easily causes and adds hot liquid rolling dead angle, causes being heated uneven, the battalion of food
Support and be difficult to discharge.
It is typically on hardware to be solved to form convection effects by the control mode of two rings alternately heating
The problems referred to above, but microprocessor controls electrical switch and selects different coil to participate in the selection of resonance heating
Handoff procedure exists certain safe time interval, causes heating to be interrupted, affect heats, and
During Gai when power rise, needing again to detect pan, noise is bigger.
Summary of the invention
The purpose of the present invention is intended to solve above-mentioned technological deficiency the most to a certain extent.
To this end, the present invention needs to propose the control method of a kind of electromagnetic heater, this control method exists
Control resonance coil when line voltage and the equal zero passage of resonance potential to switch over, it is not necessary to safe time interval,
Realizing the seriality of heating, heats is good, and without again detecting pan, noise is little.
For reaching above-mentioned purpose, the control method of a kind of electromagnetic heater that the embodiment of the present invention proposes,
Comprise the steps: S1, when described electromagnetic heater works, to input to described Electromagnetic Heating
The voltage of the electric main of device carries out zero passage detection to obtain the first detection signal；S2, according to described
First detection signal judges the voltage whether zero passage of described electric main；S3, when described electric main
Interrupt processing is entered during voltage zero-cross；S4, it is judged that it is pre-conditioned whether current time meets, if full
Foot is described pre-conditioned, then control described electromagnetic heater selects the switch resonance to current heating
Coil switches over.
The control method proposed according to embodiments of the present invention, when detecting the voltage zero-cross of electric main
Judge, and control resonance coil switches over when judging to meet condition so that switching coil exists
Line voltage zero crossing is carried out, and switchs without switch-off power, it is not necessary to safe time interval in handoff procedure,
And power persistently exports in handoff procedure, it is achieved the seriality of heating, heats is good, simultaneously without
Again need to detect pan, noise is less.
In one embodiment of the invention, described step S4 following steps replace: work as according to described
The number of times of front Time Calculation interrupt processing, and when the number of times of described interrupt processing is more than or equal to preset times
Time, the resonance coil of current heating is switched over by the switch that selects controlling described electromagnetic heater.
Wherein, whether zero passage is concrete to judge the voltage of described electric main according to described first detection signal
Including: judge whether the voltage of described electric main is less than or equal to the first predeterminated voltage, if described exchange
The voltage of civil power is less than or equal to described first predeterminated voltage, then judge the voltage mistake of described electric main
Zero.Described first predeterminated voltage can be more than or equal to 1V and less than or equal to 100V.
In described step S4, when described current time is more than or equal to Preset Time, it is judged that for described
Current time meets described pre-conditioned；When described current time is less than described Preset Time, keep
Original resonance coil participates in resonance to heat.Wherein, described Preset Time can be more than or equal to 1S
And less than or equal to 60S.
Further, in one embodiment of the invention, when the number of times of described interrupt processing is less than institute
When stating preset times, original resonance coil is kept to participate in resonance to heat.
Preferably, in one embodiment of the invention, after described step S3, described control
Method also includes: the resonance potential of described resonance coil is carried out zero passage detection to obtain the second detection letter
Number；Judge described resonance potential whether zero passage according to described second detection signal, and electric at described resonance
Described step S4 is performed when pressing through zero.Wherein, during described resonance potential is described electromagnetic heater
The C pole tension of IGBT.
Also resonance potential is carried out zero passage detection when the voltage zero-cross of input AC civil power so that power
Switch more safe and reliable in resonance coil handoff procedure.
Specifically, judge whether zero passage specifically includes described resonance potential according to described second detection signal:
Judge described resonance potential whether less than or equal to the second predeterminated voltage, if described resonance potential less than or etc.
In described second predeterminated voltage, then judge described resonance potential zero passage.Wherein, described second electricity is preset
Pressure can be more than or equal to 1V and less than or equal to 100V.
Preferably, in one embodiment of the invention, in step s 4, full when described current time
Foot described pre-conditioned time, time delay the second Preset Time controls the resonance line selecting switch to current heating
Circle switches over.
Aspect and advantage that the present invention adds will part be given in the following description, and part will be from following
Description in become obvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Present invention aspect that is above-mentioned and/or that add and advantage are from retouching embodiment below in conjunction with the accompanying drawings
Will be apparent from easy to understand in stating, wherein:
Fig. 1 is the control circuit schematic diagram of the electromagnetic heater according to one embodiment of the invention；
Fig. 2 is the control circuit schematic diagram of the electromagnetic heater according to another embodiment of the present invention
Fig. 3 is the flow chart of the control method of the electromagnetic heater according to the embodiment of the present invention；
Fig. 4 is the flow process of the control method of the electromagnetic heater according to one concrete example of the present invention
Figure；And
Fig. 5 is the control method of the electromagnetic heater according to the preferably concrete example of the present invention one
Flow chart.
Reference:
Two or more resonance heating module 10, selection switch 20, controller the 30, first zero passage detection
Module 40 and the second zero passage detection module 50, power switch 60, rectification module 70, filtration module 80,
Input AC civil power AC, resonant capacitance C0 and resonance coil L0, choking-winding L ' and filter capacitor C ',
First resistance R1, the first electric capacity C1, the first audion Q1, the second electric capacity C2, the second audion
Q2, the second resistance R2 and the 3rd electric capacity C3.
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, its
In the most same or similar label represent same or similar element or there is same or like merit
The element of energy.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining this
Bright, and be not construed as limiting the claims.
Following disclosure provides many different embodiments or example for realizing the different knots of the present invention
Structure.In order to simplify disclosure of the invention, hereinafter parts and setting to specific examples are described.
Certainly, they are the most merely illustrative, and are not intended to limit the present invention.Additionally, the present invention is permissible
Repeat reference numerals and/or letter in different examples.This repetition is to simplify and clearly mesh
, itself do not indicate the relation between discussed various embodiment and/or setting.Additionally, the present invention
The various specific technique provided and the example of material, but those of ordinary skill in the art can anticipate
Know the property of can be applicable to other techniques and/or the use of other materials.It addition, described below first
Feature second feature it " on " structure can include what the first and second features were formed as directly contacting
Embodiment, it is also possible to include the embodiment that other feature is formed between the first and second features, this
Sample the first and second feature is not likely to be directly contact.
In describing the invention, it should be noted that unless otherwise prescribed and limit, term " installs ",
" be connected ", " connection " should be interpreted broadly, for example, it may be mechanically connected or electrical connection, it is also possible to
It is the connection of two element internals, can be to be joined directly together, it is also possible to be indirectly connected to by intermediary,
For the ordinary skill in the art, the concrete of above-mentioned term can be understood as the case may be
Implication.
With reference to explained below and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.
Describe at these and in accompanying drawing, specifically disclose some particular implementation in embodiments of the invention,
Represent some modes of the principle implementing embodiments of the invention, but it is to be understood that the present invention's
The scope of embodiment is not limited.On the contrary, embodiments of the invention include that falling into attached right wants
Seek all changes, amendment and the equivalent in the range of the spirit of book and intension.
Below before describing the control method of the electromagnetic heater proposed according to embodiments of the present invention first
It is described with reference to the control circuit of electromagnetic heater.
Fig. 1 is the control circuit schematic diagram of the electromagnetic heater according to one embodiment of the invention.As
Shown in Fig. 1, the control circuit of this electromagnetic heater includes two or more resonance heating module 10, choosing
Select switch 20, controller the 30, first zero passage detection module 40 and the second zero passage detection module 50.And
And, in an embodiment of the present invention, this control circuit also include power switch 60, rectification module 70,
Filtration module 80.
Wherein, one end of each resonance heating module 10 in two or more resonance heating module and selection
One end of switch 20 is connected, and each resonance heating module 10 includes resonant capacitance C0 and the resonance of parallel connection
Coil L0.As it is shown in figure 1, filtration module 80 is connected to the rectification module 70 of electromagnetic heater
Between outfan and selection switch 20, and the input of rectification module 70 and input AC civil power AC
Being connected, filtration module 80 includes choking-winding L ' and filter capacitor C ', choking-winding L ' and filtered electrical
Holding and have node between C ', node is connected with the other end selecting switch 20.
In one embodiment of the invention, as it is shown in figure 1, one end of the first zero passage detection module 40
It is connected between the outfan of rectification module 70 and the input of filtration module 80, the first zero passage detection
The other end of module 40 is connected with controller 30.It is to say, the one of the first zero passage detection module 40
End is respectively connected with one end of choking-winding L ' and the first outfan of rectification module 70, choking-winding
The other end of L ' is connected with one end of filter capacitor C ', the other end of filter capacitor C ' and rectification mould
Second outfan of block 70 ground connection respectively.
In another embodiment of the present invention, as in figure 2 it is shown, the one of the first zero passage detection module 40
End can also be connected to the input of input AC civil power AC, and the first zero passage detection module 40
The other end is connected with controller 30.
As shown in Figure 1 or 2, the second zero passage detection module 50 and each resonance heating module 10
The other end is connected, for the resonance potential of each resonance heating module 10 is carried out zero-crossing examination with inspection
Survey the zero cross signal of the resonance potential of each resonance heating module 10.Wherein, the second zero passage detection module
40 also one end with the power switch 60 of electromagnetic heater are connected, the control end of power switch 60 with
Controller 30 is connected, and the other end ground connection of power switch 60, controller 30 is used for exporting control signal
Control the turn-on and turn-off of power switch 60.In an example of the present invention, power switch 60 can
Thinking IGBT, i.e. say, colelctor electrode C and the second zero passage detection module 50 of IGBT are connected, IGBT
Gate pole G be connected with controller 30, the emitter E ground connection of IGBT.
Specifically, as shown in Figure 1 or 2, the second zero passage detection module 50 include the first resistance R1,
First electric capacity C1, the first audion Q1, the second electric capacity C2, the second audion Q2, the second resistance
R2 and the 3rd electric capacity C3.
Wherein, one end of the first resistance R1 is connected with the colelctor electrode C of IGBT, the first electric capacity C1's
One end is connected with the other end of the first resistance R1, the other end ground connection of the first electric capacity C1.One or three pole
The base stage of pipe Q1 is connected with one end of the first electric capacity C1, the grounded emitter of the first audion Q1,
The colelctor electrode of the first audion Q1 is connected by the power supply of resistance R3 and predetermined level such as 5V, electricity
Resistance R4 is connected in parallel on the two ends of the first electric capacity C1.One end of second electric capacity C2 and the first audion Q1
Colelctor electrode be connected, the other end ground connection of the second electric capacity C2, the base stage and first of the second audion Q2
The colelctor electrode of audion Q1 is connected, the grounded emitter of the second audion Q2, the second audion Q2
Colelctor electrode be connected with the power supply of predetermined level by resistance R5；One end and second of second resistance R2
The colelctor electrode of audion Q2 is connected, and the other end of the second resistance R2 is connected with controller 30, and the 3rd
One end of electric capacity C3 is connected with the other end of the second resistance R2, the other end ground connection of the 3rd electric capacity C3.
It is, of course, understood that in the embodiment of the present invention, the circuit of the second zero passage detection module 50
It is not limited in the above, can be any electricity being capable of resonance potential carries out zero passage detection
Road.
In an embodiment of the present invention, as shown in Figure 1 or 2, controller 30 and selection switch 20
Control end, the first zero passage detection module 40 and the second zero passage detection module 50 be respectively connected with, control
Device 30 is according to the zero cross signal of input AC civil power AC and controls when resonance potential zero passage to select switch
20 switch over.In a concrete example of the present invention, controller 30 can be microprocessor
MCU。
Specifically, MCU controls to select switch 20 realization equal in ac commercial power voltage and resonance potential
The switching of resonance coil in resonance heating module 10 is carried out under low-voltage (including no-voltage) during zero passage,
Making in handoff procedure without turning off IGBT, it is not necessary to safe time interval, in handoff procedure, power continues defeated
Going out, it is achieved the seriality of heating, heats is good, simultaneously without again detecting pan, makes an uproar
Sound is less.
In some embodiments of the invention, select switch 20 can be hilted broadsword throw more formula switch or many
Individual single-pole single-throw(SPST formula switchs, and when selection switch 20 is multiple single-pole single-throw(SPST formula switch, multiple hilted broadswords
Each single-pole single-throw(SPST formula switch in single-throw switch and each resonance heating module 10 one_to_one corresponding.
In other embodiments of the present invention, selecting switch 20 can also be multiple relay, controlled
Silicon, IGBT or metal-oxide-semiconductor, and each relay, controllable silicon, IGBT or metal-oxide-semiconductor are with every
Individual resonance heating module 10 one_to_one corresponding.
Fig. 3 is the flow chart of the control method of the electromagnetic heater according to the embodiment of the present invention.Such as figure
Shown in 3, the control method of this electromagnetic heater comprises the steps:
S1, the electricity when electromagnetic heater works, to the electric main of input to electromagnetic heater
Pressure carries out zero passage detection to obtain the first detection signal, say, that the first zero passage detection module is to friendship
The voltage of stream civil power AC carries out the zero-crossing examination zero cross signal with detection electric main AC, and will
First detection signal inputs to controller.
S2, judges the voltage whether zero passage of electric main according to the first detection signal.Controller is according to working as
The size of the voltage of the electric main of front detection judges whether zero passage, i.e. says, it is judged that electric main AC
Voltage whether less than or equal to the first predeterminated voltage U0, if the voltage of electric main is less than or equal to first
Predeterminated voltage U0, then judge the voltage zero-cross of electric main.It is to say, when input AC civil power
Voltage U is less than or equal to the first predeterminated voltage U0, according to detection signal now, controller judges that input is handed over
The voltage zero-cross of stream civil power.Wherein, the first predeterminated voltage U0 can be more than or equal to 1V and to be less than
In 100V.
S3, enters interrupt processing when the voltage zero-cross of electric main.
S4, it is judged that it is pre-conditioned whether current time meets, if meeting pre-conditioned, then controls electricity
The resonance coil of current heating is switched over by the switch that selects of magnetic heater.
In one embodiment of the invention, in step s 4, when described current time is more than or equal to pre-
If during the time, then it is judged as that current time meets pre-conditioned.And when described current time is less than presetting
During the time, original resonance coil is kept to participate in resonance to heat.
Specifically, during the voltage zero-cross of input AC civil power, the master of electromagnetic heater
Program enters interrupt processing, and current time t of controller detection timer, as t Ton, controller is defeated
Going out signal drives selection switch to switch over resonance coil；As t < Ton, original resonance coil is kept to join
With resonance to carry out resonance heating.Wherein, the working time often organizing coil single it is preset with in controller
I.e. preset time T on, timer reclocking when every secondary coil switches, preset time T on is permissible
More than or equal to 1S and less than or equal to 60S.
In another embodiment of the present invention, step S4 can also replace by following steps: according to working as
The number of times of front Time Calculation interrupt processing, and when the number of times of interrupt processing is more than or equal to preset times,
The resonance coil of current heating is switched over by the switch that selects controlling electromagnetic heater.
In step s 4, calculate the number of times of interrupt processing according to current time, and work as the secondary of interrupt processing
When number is more than or equal to preset times, controls resonance coil and switch over.When the number of times of interrupt processing is less than
During preset times, original resonance coil is kept to participate in resonance to heat.
It is to say, carry out with preset times N in microprocessor by calculating interrupt processing times n
Relatively, as n N, microprocessor output signal drives and selects switch to switch over resonance coil；
As n < N, original resonance coil is kept to participate in resonance to carry out resonance heating.
Preferably, in one embodiment of the invention, after step s 3, above-mentioned Electromagnetic Heating dress
The control method put also includes: the resonance potential of resonance coil is carried out zero passage detection to obtain the second inspection
Survey signal；Resonance potential whether zero passage is judged according to the second detection signal, and when resonance potential zero passage
Perform step S4.In resonance coil handoff procedure, in order to make power switch IGBT at resonance coil
Safety and reliability in handoff procedure, in addition it is also necessary to the zero cross signal of resonance potential is detected.Above-mentioned
After step S3, also include: the second zero passage detection module carries out zero passage detection to resonance potential, and will
Second detection signal exports to microprocessor, and as resonance potential U1 U2, U2 is the second default electricity
Pressure, microprocessor is judged as resonance potential zero passage according to detection signal now, just enters above-mentioned steps
S4。
Wherein, judge whether zero passage specifically includes resonance potential according to the second detection signal: judge resonance
Whether voltage U1 is less than or equal to the second predeterminated voltage U2, if resonance potential U1 is less than or equal to second
Predeterminated voltage U2, then judge resonance potential zero passage.Second predeterminated voltage U2 can be more than or equal to 1V
And less than or equal to 100V.Wherein, the C pole tension of IGBT during resonance potential is electromagnetic heater.
Preferably, in one embodiment of the invention, in step s 4, meet pre-when current time
If during condition, time delay the second Preset Time controls to select switch to cut the resonance coil of current heating
Change.Wherein, the second Preset Time can be demarcated according to practical situation.
Owing to selecting switch when receiving control signal, itself there is certain time delay response time, for
Select the actual of switch to be switched on or off being under low-voltage, make choosing by time delay the second Preset Time
Selecting switch, to be in particular phases (under low-voltage or zero passage voltage) open-minded.
In a concrete example of the present invention, as shown in Figure 4, the control of above-mentioned electromagnetic heater
Method processed comprises the steps:
S401, starts, and electromagnetic heater is started working.
S402, keeps original resonance coil to heat.
S403, it is judged that U, whether less than or equal to U0, i.e. judges line voltage whether zero passage.If it is,
Then perform step S404；If it is not, then return step S403, continue to judge.
S404, during civil power zero passage, enters interrupt processing.
S405, it is judged that whether current time t is more than or equal to preset time T on.If it is, perform step
Rapid S406；Step S402 is performed if it is not, then return.
In step S405, it is also possible to carry out judging whether to need resonance according to the number of times of interrupt processing
Coil switches over.
S406, switching resonance coil heats.
Preferably, in a concrete example of the present invention, as it is shown in figure 5, above-mentioned Electromagnetic Heating
The control method of device comprises the steps:
S501, starts, and electromagnetic heater is started working.
S502, keeps original resonance coil to heat.
S503, it is judged that U, whether less than or equal to U0, i.e. judges line voltage whether zero passage.If it is,
Then perform step S504；If it is not, then return step S503, continue to judge.
S504, it is judged that U1, whether less than or equal to U2, i.e. judges resonance potential whether zero passage.If it is,
Then perform step S505；If it is not, then return step S504, continue to judge.
S505, during the equal zero passage of civil power and resonance potential, enters interrupt processing.
S506, it is judged that whether current time t is more than or equal to preset time T on.If it is, perform step
Rapid S507；Step S502 is performed if it is not, then return.
In step S506, it is also possible to carry out judging whether to need resonance according to the number of times of interrupt processing
Coil switches over.
S507, switching resonance coil heats.
The control method proposed according to embodiments of the present invention, is detecting voltage and the resonance of electric main
Judge during the equal zero passage of voltage, and control resonance coil switches over when judging to meet condition, makes
Obtain in handoff procedure and switch without switch-off power, it is not necessary to merit in safe time interval, and handoff procedure
Rate persistently exports, it is achieved the seriality of heating, and heats is good, simultaneously without again carrying out pan
Detection, noise is less.
Wherein it is desired to explanation, electromagnetic heater can be electromagnetic oven, electromagnetic rice cooker or
Prevention electromagnetic pressure cooker etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ",
It is concrete that the description of " concrete example " or " some examples " etc. means to combine this embodiment or example describes
Feature, structure, material or feature are contained at least one embodiment or the example of the present invention.?
In this specification, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.
And, the specific features of description, structure, material or feature can be in any one or more realities
Execute in example or example and combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for those of ordinary skill in the art
For, it is possible to understand that without departing from the principles and spirit of the present invention can be to these embodiments
Carry out multiple change, revise, replace and modification, the scope of the present invention by claims and etc.
With limiting.
Claims (12)
1. the control method of an electromagnetic heater, it is characterised in that described electromagnetic heater
Control circuit include two or more resonance heating module, select switch, power switch, said two with
Each resonance heating module in upper resonance heating module includes resonance coil, described power switch and institute
State each resonance heating module to be connected to carry out resonant operational with described each resonance heating module respectively,
Described control method comprises the steps:
S1, the exchange when described electromagnetic heater works, to input to described electromagnetic heater
The voltage of civil power carries out zero passage detection to obtain the first detection signal；
S2, judges the voltage whether zero passage of described electric main according to described first detection signal；
S3, enters interrupt processing when the voltage zero-cross of described electric main；
S4, it is judged that it is pre-conditioned whether current time meets, if meeting described pre-conditioned, then controls
The resonance coil of current heating is switched over by the switch that selects making described electromagnetic heater.
2. control method as claimed in claim 1, it is characterised in that described step S4 is with following
Step replaces: calculate the number of times of interrupt processing according to described current time, and when described interrupt processing
When number of times is more than or equal to preset times, control the selection switch of described electromagnetic heater to current heating
Resonance coil switch over.
3. control method as claimed in claim 1 or 2, it is characterised in that according to described first inspection
Survey signal and judge whether zero passage specifically includes for the voltage of described electric main:
Judge whether the voltage of described electric main is less than or equal to the first predeterminated voltage, if described exchange city
The voltage of electricity less than or equal to described first predeterminated voltage, then judges the voltage zero-cross of described electric main.
4. control method as claimed in claim 1 or 2, it is characterised in that in described step S4
In, when described current time is more than or equal to Preset Time, then it is judged as that described current time meets institute
State pre-conditioned；When described current time is less than described Preset Time, original resonance coil is kept to join
With resonance to heat.
5. control method as claimed in claim 2, it is characterised in that when described interrupt processing time
When number is less than described preset times, original resonance coil is kept to participate in resonance to heat.
6. control method as claimed in claim 1 or 2, it is characterised in that in described step S3
Afterwards, also include:
The resonance potential of described resonance coil is carried out zero passage detection to obtain the second detection signal；
Judge described resonance potential whether zero passage according to described second detection signal, and electric at described resonance
Described step S4 is performed when pressing through zero.
7. control method as claimed in claim 6, it is characterised in that described resonance potential is described
The C pole tension of IGBT in electromagnetic heater.
8. control method as claimed in claim 6, it is characterised in that according to described second detection letter
Number judge whether zero passage specifically includes described resonance potential:
Judge whether described resonance potential is less than or equal to the second predeterminated voltage, if described resonance potential is less than
Or equal to described second predeterminated voltage, then judge described resonance potential zero passage.
9. control method as claimed in claim 8, it is characterised in that described second predeterminated voltage is big
In equal to 1V and less than or equal to 100V.
10. control method as claimed in claim 3, it is characterised in that described first predeterminated voltage
More than or equal to 1V and less than or equal to 100V.
11. control methods as claimed in claim 4, it is characterised in that described Preset Time is more than
Equal to 1S and less than or equal to 60S.
12. control methods as claimed in claim 1, it is characterised in that in step s 4, work as institute
State current time meet described pre-conditioned time, time delay the second Preset Time control select switch to currently
The resonance coil of heating switches over.
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| CN106211391B (en) * | 2015-04-29 | 2023-01-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and zero-crossing switching-on control device and method of switching tube of electromagnetic heating system |
| CN106686785A (en) * | 2015-11-11 | 2017-05-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus and control method therefor |
| CN108882421B (en) * | 2017-05-11 | 2021-05-07 | 佛山市顺德区美的电热电器制造有限公司 | Heating control method, heating control device and electromagnetic heating equipment |
| CN109152117B (en) * | 2017-06-28 | 2021-01-19 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating system and pulse width adjusting method thereof |
| CN112449451B (en) * | 2019-08-29 | 2023-03-21 | 台达电子工业股份有限公司 | Induction cooker and operation method thereof |
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| CN201323669Y (en) * | 2008-11-28 | 2009-10-07 | 佛山市顺德区瑞德电子实业有限公司 | Control device of continuous heating during low power period of electromagnetic oven |
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| JP2004022501A (en) * | 2002-06-20 | 2004-01-22 | Toshiba Home Technology Corp | Electromagnetic induction heating arrangement |
| CN103416104B (en) * | 2011-12-06 | 2015-08-19 | 松下电器产业株式会社 | Induction heating equipment |
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|---|---|---|---|---|
| CN201323669Y (en) * | 2008-11-28 | 2009-10-07 | 佛山市顺德区瑞德电子实业有限公司 | Control device of continuous heating during low power period of electromagnetic oven |
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