CN107155229A - Electromagnetic Heating cooker and its heating control circuit and control method - Google Patents
Electromagnetic Heating cooker and its heating control circuit and control method Download PDFInfo
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- CN107155229A CN107155229A CN201610121804.6A CN201610121804A CN107155229A CN 107155229 A CN107155229 A CN 107155229A CN 201610121804 A CN201610121804 A CN 201610121804A CN 107155229 A CN107155229 A CN 107155229A
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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
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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
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
The invention discloses a kind of Electromagnetic Heating cooker and its heating control circuit and control method, heating control circuit includes：Main resonance heating module, it includes heating coil, resonant capacitance and R-T tube；Rectification module, the alternating current that AC power is provided is converted to direct current by it；Filtration module；Drive module, it is connected to drive being switched on or off for R-T tube with the control pole of R-T tube；The auxiliary heating module being connected with the output end of rectification module；Zero passage detection module, for detecting the zero crossing of AC power to generate zero cross signal；Control module, first zero crossing control auxiliary heating module of the control module in zero cross signal is carried out after heating electric discharge work, further according to the second zero crossing output driving control signal in zero cross signal to drive module with control main resonance heating module carry out heating work, so as to reduce the C pole tensions of R-T tube such as IGBT pipes, the dash current of R-T tube is reduced, prevents from damaging R-T tube.
Description
Technical field
The present invention relates to technical field of electric appliances, more particularly to a kind of heating control circuit, the Yi Zhong electricity of Electromagnetic Heating cooker
Magnetic heating cooking device and a kind of control method of the heating control circuit of Electromagnetic Heating cooker.
Background technology
Electromagnetic Heating cooker such as electromagnetic rice cooker in correlation technique is by controlling R-T tube on or off to enter
Row resonance is heated.But, correlation technique has the drawback that, due to the presence of filter capacitor, rectified filtered direct current
Voltage by for the 1.4 of alternating voltage times, so, there is the phenomenon that R-T tube is opened firmly during resonance heating starting, now
The dash current of R-T tube can be made excessive, R-T tube damage is easily caused.Therefore, correlation technique needs to be improved.
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 present invention
Purpose is to propose a kind of heating control circuit of Electromagnetic Heating cooker, and the circuit passes through when can reduce resonance heating starting
The dash current of R-T tube.
It is another object of the present invention to propose a kind of Electromagnetic Heating cooker.A further object of the present invention is to propose
A kind of control method of the heating control circuit of Electromagnetic Heating cooker.
To reach above-mentioned purpose, a kind of heating control circuit for Electromagnetic Heating cooker that one aspect of the present invention embodiment is proposed,
Including：Main resonance heating module, the main resonance heating module includes heating coil, resonant capacitance and R-T tube；It is whole
The alternating current that AC power is provided is converted to direct current by flow module, the rectification module；Filtration module, the filtration module
Input be connected with the output end of the rectification module, the output end of the filtration module and the main resonance heating module phase
Even, the filtration module is filtered processing to the direct current, and the direct current after filtering process is supplied into the main resonance
Heating module；Drive module, the drive module is connected to drive the resonant switch with the control pole of the R-T tube
Pipe is switched on or off；Auxiliary heating module, the auxiliary heating module is connected with the output end of the rectification module；Zero passage
Detection module, the zero passage detection module is used to detect the zero crossing of the AC power to generate zero cross signal；Control module,
The control module is connected with the zero passage detection module, the auxiliary heating module and the drive module respectively, the control
Molding root tuber controls the auxiliary heating module to carry out after heating electric discharge work according to the first zero crossing in the zero cross signal, then
The second zero crossing output driving control signal in the zero cross signal is to the drive module to control the main resonance to add
Thermal modules carry out heating work.
The heating control circuit of the Electromagnetic Heating cooker proposed according to embodiments of the present invention, auxiliary heating module and rectification mould
The output end of block is connected, and detects the zero crossing of AC power to generate zero cross signal, control module root by zero passage detection module
Carried out according to the first zero crossing control auxiliary heating module in zero cross signal after heating electric discharge work, further according in zero cross signal
Second zero crossing output driving control signal to drive module with control main resonance heating module carry out heating work.Thus, exist
Control auxiliary heating module heating electric discharge in advance before main resonance heating module starts, so as to reduce R-T tube such as IGBT
The C pole tensions of pipe, by the dash current of R-T tube when reduction main resonance heating module starts, prevent that damaging resonance opens
Guan Guan.
According to one embodiment of present invention, the auxiliary heating module includes：First heating unit, first heating is single
One end of member is connected with the output end of the rectification module；First driver element, first driver element adds with described first
The other end of hot cell is connected, to drive first heating unit；Wherein, the control module and the described first driving are single
The control end of member is connected to control first heating unit to be heated or stopped heating.
According to one embodiment of present invention, first driver element includes：First resistor, one end of the first resistor
It is connected with the control module；First switch pipe, the base stage of the first switch pipe is connected with the other end of the first resistor,
The colelctor electrode of the first switch pipe is connected with default power supply；Opened with described first second resistance, one end of the second resistance
The emitter stage for closing pipe is connected；3rd resistor, one end of the 3rd resistor and the other end of the second resistance are grounded, described
The other end ground connection of 3rd resistor, has first node between the second resistance and the 3rd resistor；Second switch pipe,
The base stage of the second switch pipe is connected with the first node, and the colelctor electrode of the second switch pipe and the described first heating are single
The other end of member is connected, the grounded emitter of the second switch pipe.
According to one embodiment of present invention, the auxiliary heating module also includes：Second heating unit, second heating
One end of unit is connected with the output end of the rectification module and one end of first heating unit respectively；Second driver element,
Second driver element is connected with the other end of second heating unit, to drive second heating unit；Wherein,
The control module is connected to control second heating unit to be heated or stopped with the control end of second driver element
Heating.
According to one embodiment of present invention, second driver element includes：4th resistance, one end of the 4th resistance
It is connected with the control module；3rd switching tube, the base stage of the 3rd switching tube is connected with the other end of the 4th resistance,
The colelctor electrode of 3rd switching tube is connected with default power supply；Opened with the described 3rd 5th resistance, one end of the 5th resistance
The emitter stage for closing pipe is connected；6th resistance, one end of the 6th resistance is grounded with the other end of the 5th resistance, described
The other end ground connection of 6th resistance, has Section Point between the 5th resistance and the 6th resistance；4th switching tube,
The base stage of 4th switching tube is connected with the Section Point, and the colelctor electrode of the 4th switching tube and the described second heating are single
The other end of member is connected, the grounded emitter of the 4th switching tube.
According to one embodiment of present invention, first heating unit is arranged on the top of the Electromagnetic Heating cooker,
Second heating unit is arranged on the side wall of the Electromagnetic Heating cooker.
According to one embodiment of present invention, first heating unit and second heating unit are heating resistance wire.
According to one embodiment of present invention, first zero crossing is located at the same of the alternating current with second zero crossing
In individual half wave cycles.
To reach above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of Electromagnetic Heating cooker, including described
The heating control circuit of Electromagnetic Heating cooker.
The Electromagnetic Heating cooker proposed according to embodiments of the present invention, passes through the heating control of above-mentioned Electromagnetic Heating cooker
Circuit processed, it is possible to decrease the C pole tensions of R-T tube such as IGBT pipes, by humorous when reduction main resonance heating module starts
Shake the dash current of switching tube, prevents from damaging R-T tube.
To reach above-mentioned purpose, another aspect of the invention embodiment proposes a kind of computer heating control electricity of Electromagnetic Heating cooker
The control method on road, comprises the following steps：The zero crossing of AC power is detected to generate zero cross signal；Believed according to the zero passage
The first zero crossing control auxiliary heating module in number is carried out after heating electric discharge work, further according to second in the zero cross signal
Zero crossing output driving control signal to drive module with control main resonance heating module carry out heating work.
The control method of the heating control circuit of the Electromagnetic Heating cooker proposed according to embodiments of the present invention, detects alternating current
The zero crossing in source is to generate zero cross signal, and then the first zero crossing control auxiliary heating module in the zero cross signal enters
Row heating electric discharge work after, further according to the second zero crossing output driving control signal in the zero cross signal to drive module with
Main resonance heating module is controlled to carry out heating work.Thus, the control auxiliary heating in advance before the startup of main resonance heating module
Module heating electric discharge, so as to reduce the C pole tensions of R-T tube such as IGBT pipes, reduction main resonance heating module starts
When by the dash current of R-T tube, prevent from damaging R-T tube.
According to one embodiment of present invention, first zero crossing is provided with second zero crossing positioned at the AC power
Alternating current same half wave cycles in.
Brief description of the drawings
Fig. 1 is the block diagram of the heating control circuit of Electromagnetic Heating cooker according to embodiments of the present invention；
Fig. 2 is the circuit theory schematic diagram of the heating control circuit of Electromagnetic Heating cooker according to an embodiment of the invention；
Fig. 3 is that the circuit theory of the heating control circuit of the Electromagnetic Heating cooker according to a specific embodiment of the invention is shown
It is intended to；
Fig. 4 is that the control waveform of the heating control circuit of the Electromagnetic Heating cooker according to a specific embodiment of the invention shows
It is intended to；And
Fig. 5 is the flow chart of the control method of the heating control circuit of Electromagnetic Heating cooker according to embodiments of the present invention.
Reference：
Main resonance heating module 10, rectification module 20, filtration module 30, drive module 40, auxiliary heating module 50, mistake
Zero detection module 60 and control module 70；
Fuse F1, piezo-resistance MOV, filter inductance L1, filter capacitor C1, heating coil L2, resonant capacitance C2,
R-T tube 11；
First heating unit 51, the first driver element 52, first resistor R1, first switch pipe Q1, second resistance R2,
3rd resistor R3 and second switch pipe Q2；
Second heating unit 53, the second driver element 54, the 4th resistance R4, the 3rd switching tube Q3, the 5th resistance R5,
6th resistance R6 and the 4th switching tube Q4.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein identical from beginning to end
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.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition Electromagnetic Heating cooker heating control circuit, electromagnetism
The control method of the heating control circuit of heating cooking device and Electromagnetic Heating cooker.
Fig. 1 is the block diagram of the heating control circuit of Electromagnetic Heating cooker according to embodiments of the present invention.Such as Fig. 1
Shown, the heating control circuit of the Electromagnetic Heating cooker includes：Main resonance heating module 10, rectification module 20, filtering
Module 30, drive module 40, auxiliary heating module 50, zero passage detection module 60 and control module 70.
Wherein, main resonance heating module 10 includes heating coil, resonant capacitance and R-T tube, specifically, heating coil
Resonance being carried out during R-T tube on or off with resonant capacitance and producing periodically variable magnetic field, magnetic field is made
Used in the bottom of a pan of pan, the bottom of a pan is set to produce vortex and while producing heat, thus main resonance heating module 10 carries out electricity to pan
Magnetic resonance is heated.According to the specific example of the present invention, R-T tube can be high-voltage three-pole pipe, MOSFET pipes or IGBT
Pipe etc..
The alternating current that AC power is provided is converted to direct current by rectification module 20；The input of filtration module 30 and rectification mould
The output end of block 20 is connected, and the output end of filtration module 30 is connected with main resonance heating module 10, and 30 pairs of filtration module is straight
Stream electricity is filtered processing, and the direct current after filtering process is supplied into main resonance heating module 10.
Drive module 40 is connected to drive being switched on or off for R-T tube with the control pole of R-T tube；Aid in heated mould
Block 50 is connected with the output end of rectification module 20；Zero passage detection module 60 is used to detect the zero crossing of AC power to generate
Zero-signal, such as zero passage detection module 60 can detect the voltage over zero of alternating current to generate zero cross signal；Control module 70
It is connected respectively with zero passage detection module 60, auxiliary heating module 50 and drive module 40, control module 70 is believed according to zero passage
The first zero crossing control auxiliary heating module 50 in number is carried out after heating electric discharge work, further according to the second mistake in zero cross signal
Offset output driving control signal to drive module 40 with control main resonance heating module 10 carry out heating work.
According to one embodiment of present invention, the first zero crossing and the second zero crossing can be located at the same half wave cycles of alternating current
Interior, in other words, the first zero crossing and the second zero crossing are two adjacent zero crossings.As shown in figure 4, in half wave cycles T
Previous zero crossing is the first zero crossing, and latter zero crossing is the second zero crossing in half wave cycles T.It should be appreciated that
First zero crossing is may be alternatively located at from the second zero crossing in different half wave cycles, in other words, the first zero crossing and the second zero crossing
Between can be separated by least one zero crossing.
Specifically, before the startup of main resonance heating module 10, the zero passage of alternating current is detected by zero passage detection module 60
Point, and zero cross signal is exported to control module 70 in the instantaneous value zero passage of alternating current, control module 70 is receiving first
Judge to detect the first zero crossing during individual zero cross signal, the now control of control module 70 auxiliary heating module 50 is added in advance
Heat, filtration module 30 is discharged by auxiliary heating module 50 so that in filtered voltage such as Fig. 2 A points electricity
Pressure drop is low, and then causes the C pole tensions reduction of R-T tube such as IGBT pipes so that by humorous during resonance heating starting
Shake switching tube such as IGBT pipes dash current reduction.Afterwards, control module 70 is when receiving second zero cross signal,
Judgement detects the second zero crossing, and now output driving control signal such as PPG pulse signals extremely drive control module 70 immediately
Dynamic model block 40, now drive module 40 is humorous to control to lead according to driving control signal driving R-T tube on or off
The heating module 10 that shakes carries out Electromagnetic Heating, while the control auxiliary heating module 50 of control module 70 stops heating.
Thus, the heating control circuit for the Electromagnetic Heating cooker that the embodiment of the present invention is proposed, is opened in main resonance heating module
Control auxiliary heating module heating electric discharge in advance before dynamic, so that the C pole tensions of R-T tube such as IGBT pipes are reduced,
The dash current by R-T tube when main resonance heating module starts is reduced, prevents from damaging R-T tube.
2-4 describes the circuit structure of the heating control circuit of the Electromagnetic Heating cooker of the embodiment of the present invention below in conjunction with the accompanying drawings
And operation principle.
According to one embodiment of present invention, as shown in Figures 2 and 3, rectification module 20 has first input end and the second input
End, the first input end of rectification module 20 is connected by fuse F1 with the live wire L of AC power, and the of rectification module 20
Two inputs are connected with the zero line N of AC power, wherein, piezo-resistance MOV is connected in parallel on the first input of rectification module 20
Between end and the second input.
Rectification module 20 has the first output end and the second output end, and the second output head grounding of rectification module 20 filters mould
Block 30 includes filter inductance L1 and filter capacitor C1, filter inductance L1 one end and the first output end phase of rectification module 20
Even, filter capacitor C1 one end is connected with the filter inductance L1 other end, filter capacitor C1 other end ground connection, filtering
There is the 3rd node A between inductance L1 and filter capacitor C1.
According to one embodiment of present invention, as shown in Figures 2 and 3, heating coil L2 and resonant capacitance C2 are with parallel way
Connection, heating coil L2 in parallel and resonant capacitance C2 one end are connected with the 3rd node A, and the one of R-T tube 11
The C poles of such as IGBT pipes are held to be connected with heating coil L2 and resonant capacitance the C2 in parallel other end, R-T tube 11
The other end such as IGBT pipes E poles ground connection, the G poles of the control end such as IGBT pipes of R-T tube 11 and driving mould
Block 40 is connected.
According to one embodiment of present invention, as shown in Figures 2 and 3, auxiliary heating module 50 includes：First heating unit 51
With the first driver element 52.Wherein, one end of the first heating unit 51 and the output end of rectification module 20 are the first output end
It is connected；First driver element 52 is connected to drive the first heating unit 51 with the other end of the first heating unit 51；Control mould
Block 70 is connected to control the first heating unit 51 to be heated or stopped heating with the control end of the first driver element 52.
That is, when control module 70 controls the conducting of the first driver element 52, the first heating unit 51 carries out heating and put
Electricity work；When control module 70 controls the shut-off of the first driver element 52, the first heating unit 51 stops heating.
Specifically, as shown in figure 3, the first driver element 52 includes：First resistor R1, first switch pipe Q1, the second electricity
Hinder R2,3rd resistor R3 and second switch pipe Q2.
Wherein, first resistor R1 one end is connected with control module 70；First switch pipe Q1 base stage and first resistor R1
The other end be connected, first switch pipe Q1 colelctor electrode is connected with default power vd D；Second resistance R2 one end and the
One switching tube Q1 emitter stage is connected；3rd resistor R3 one end is grounded with the second resistance R2 other end, 3rd resistor
R3 other end ground connection, has first node between second resistance R2 and 3rd resistor R3；Second switch pipe Q2 base stage
It is connected with first node, second switch pipe Q2 colelctor electrode is connected with the other end of the first heating unit 51, second switch pipe
Q2 grounded emitter.
According to one embodiment of present invention, as shown in Figures 2 and 3, auxiliary heating module 52 may also include：Second heating is single
The driver element 54 of member 53 and second.
Wherein, one end of the second heating unit 54 is the first output end and the first heating with the output end of rectification module 20 respectively
One end of unit 51 is connected；Second driver element 54 is connected with the other end of the second heating unit 53, to drive the second heating
Unit 53；Control module 70 is connected to control the second heating unit 53 to be heated with the control end of the second driver element 54
Or stop heating.
That is, when control module 70 controls the conducting of the second driver element 54, the second heating unit 53 carries out heating and put
Electricity work；When control module 70 controls the shut-off of the second driver element 54, the second heating unit 53 stops heating.
Specifically, as shown in figure 3, the second driver element 54 includes：4th resistance R4, the 3rd switching tube Q3, the 5th electricity
Hinder R5, the 6th resistance R6 and the 4th switching tube Q4.
Wherein, the 4th resistance R4 one end is connected with control module 70；3rd switching tube Q3 base stage and the 4th resistance R4
The other end be connected, the 3rd switching tube Q3 colelctor electrode is connected with default power vd D；5th resistance R5 one end and the
Three switching tube Q3 emitter stage is connected；6th resistance R6 one end is grounded with the 5th resistance R5 other end, the 6th resistance
R6 other end ground connection, has Section Point between the 5th resistance R5 and the 6th resistance R6；4th switching tube Q4 base stage
It is connected with Section Point, the 4th switching tube Q4 colelctor electrode is connected with the other end of the second heating unit 53, the 4th switching tube
Q4 grounded emitter.
Specifically, before control main resonance heating module 10 starts, control auxiliary heating module 50 is heated in advance.
As shown in figure 4, in the previous zero crossing of half wave cycles, zero passage detection module 60 exports first zero cross signal and gives control mould
Block 70, control module 70 judges to detect the first zero crossing, and exports high level signal to the first drive by first port B
Moving cell 52, and high level signal is exported to the second driver element 54 by second port C, so that first switch pipe
Q1 and the 3rd switching tube Q3 conducting, first switch pipe Q1 and the 3rd switching tube Q3 conducting after cause second switch pipe Q2 and
4th switching tube Q4 is turned on, and the first heating unit 51 and the second heating unit 52 carry out heating electric discharge work, A point voltages by
Gradually reduce, the C pole tensions of IGBT pipes correspondingly decline.In latter zero crossing of half wave cycles, zero passage detection module 60
Second zero cross signal is exported to control module 70, control module 70 judges to detect the second zero crossing, and passes through the 3rd end
Mouth D output drivings control signal such as PPG pulse signals to drive module 40, drive module 40 drives R-T tube 11
It is operated, now A points voltage drops to below predetermined voltage threshold, so that when reducing the startup of main resonance heating module 10
By the dash current of R-T tube, while and low level signal is exported to the first driver element 52 by first port B,
And low level signal is exported to the second driver element 54 by second port C, so that first switch pipe Q1, second opening
Pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4 shut-offs are closed, the first heating unit 51 and the second heating unit 52 stop
Only heat.
According to one embodiment of present invention, the first heating unit 51 may be provided at the top of Electromagnetic Heating cooker, second
Heating unit 53 may be provided at the side wall of Electromagnetic Heating cooker.Specifically, the first heating unit 51 and the second heating are single
Member 53 is heating resistance wire.
To sum up, the heating control circuit of the Electromagnetic Heating cooker proposed according to embodiments of the present invention, auxiliary heating module with
The output end of rectification module is connected, and detects the zero crossing of AC power to generate zero cross signal by zero passage detection module, controls
First zero crossing control auxiliary heating module of the module in zero cross signal is carried out after heating electric discharge work, is believed further according to zero passage
The second zero crossing output driving control signal in number is to drive module to control main resonance heating module to carry out heating work.By
This, the control auxiliary heating module heating electric discharge in advance before the startup of main resonance heating module, so as to reduce R-T tube example
Such as the C pole tensions of IGBT pipes, by the dash current of R-T tube when reduction main resonance heating module starts, prevent stopping loss
Bad R-T tube.
The embodiment of the present invention also proposed a kind of Electromagnetic Heating cooker, include the heating of above-mentioned Electromagnetic Heating cooker
Control circuit.
The Electromagnetic Heating cooker proposed according to embodiments of the present invention, passes through the heating control of above-mentioned Electromagnetic Heating cooker
Circuit processed, it is possible to decrease the C pole tensions of R-T tube such as IGBT pipes, by humorous when reduction main resonance heating module starts
Shake the dash current of switching tube, prevents from damaging R-T tube.
The embodiment of the present invention has also been proposed a kind of control method of the heating control circuit of Electromagnetic Heating cooker.
Fig. 5 is the flow chart of the control method of the heating control circuit of Electromagnetic Heating cooker according to embodiments of the present invention.
As shown in figure 5, this method comprises the following steps：
S1：The zero crossing of AC power is detected to generate zero cross signal.
S2：The first zero crossing control auxiliary heating module in zero cross signal is carried out after heating electric discharge work, further according to mistake
The second zero crossing output driving control signal in zero-signal is to drive module to control main resonance heating module to carry out heater
Make.
According to one embodiment of present invention, the first zero crossing is located at the same of the alternating current that AC power is provided with the second zero crossing
In one half wave cycles.
To sum up, the control method of the heating control circuit of the Electromagnetic Heating cooker proposed according to embodiments of the present invention, detection
The zero crossing of AC power is to generate zero cross signal, then the first zero crossing control auxiliary heating in the zero cross signal
Module is carried out after heating electric discharge work, further according to the second zero crossing output driving control signal in the zero cross signal to driving
Module with control main resonance heating module carry out heating work.Thus, controlled in advance before the startup of main resonance heating module auxiliary
Heating module heating electric discharge is helped, so as to reduce the C pole tensions of R-T tube such as IGBT pipes, main resonance heated mould is reduced
By the dash current of R-T tube when block starts, prevent from damaging R-T tube.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, are for only for ease of the description present invention and simplify description, rather than indicate or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " be only used for describe purpose, and it is not intended that indicate or imply relative importance or
The implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed or hidden
Include at least one this feature containing ground.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, the art such as term " installation ", " connected ", " connection ", " fixation "
Language should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be machinery
Connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
The interaction relationship of connection or two elements inside part, unless otherwise clear and definite restriction.For the ordinary skill of this area
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be "above" or "below" second feature
First and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Only represent that fisrt feature level height is 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 be merely representative of fisrt feature level height less than second
Feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specific example ",
Or the description of " some examples " etc. means to combine specific features, structure, material or the feature bag that the embodiment or example are described
It is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
Combined in an appropriate manner in individual or multiple embodiments or example.In addition, in the case of not conflicting, the skill of this area
Not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be combined by art personnel
And combination.
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 (11)
1. a kind of heating control circuit of Electromagnetic Heating cooker, it is characterised in that including：
Main resonance heating module, the main resonance heating module includes heating coil, resonant capacitance and R-T tube；
The alternating current that AC power is provided is converted to direct current by rectification module, the rectification module；
Filtration module, the input of the filtration module is connected with the output end of the rectification module, the filtration module it is defeated
Go out end with the main resonance heating module to be connected, the filtration module is filtered the direct current processing, and by filtering
Direct current after reason supplies the main resonance heating module；
Drive module, the drive module is connected to drive opening for the R-T tube with the control pole of the R-T tube
Logical or shut-off；
Auxiliary heating module, the auxiliary heating module is connected with the output end of the rectification module；
Zero passage detection module, the zero passage detection module is used to detect the zero crossing of the AC power to generate zero cross signal；
Control module, the control module respectively with the zero passage detection module, the auxiliary heating module and the driving mould
Block is connected, and first zero crossing of the control module in the zero cross signal controls the auxiliary heating module to be heated
Discharge after work, further according to the second zero crossing output driving control signal in the zero cross signal to the drive module to control
Make the main resonance heating module and carry out heating work.
2. the heating control circuit of Electromagnetic Heating cooker according to claim 1, it is characterised in that the auxiliary
Heating module includes：
First heating unit, one end of first heating unit is connected with the output end of the rectification module；
First driver element, first driver element is connected with the other end of first heating unit, to drive described
One heating unit；
Wherein, the control module is connected to control first heating unit to carry out with the control end of first driver element
Heating stops heating.
3. the heating control circuit of Electromagnetic Heating cooker according to claim 2, it is characterised in that described first
Driver element includes：
First resistor, one end of the first resistor is connected with the control module；
First switch pipe, the base stage of the first switch pipe is connected with the other end of the first resistor, the first switch pipe
Colelctor electrode be connected with default power supply；
Second resistance, one end of the second resistance is connected with the emitter stage of the first switch pipe；
3rd resistor, the other end of one end of the 3rd resistor and the second resistance is grounded, the 3rd resistor it is another
End ground connection, has first node between the second resistance and the 3rd resistor；
Second switch pipe, the base stage of the second switch pipe is connected with the first node, the colelctor electrode of the second switch pipe
It is connected with the other end of first heating unit, the grounded emitter of the second switch pipe.
4. the heating control circuit of Electromagnetic Heating cooker according to claim 2, it is characterised in that the auxiliary
Heating module also includes：
Second heating unit, one end of second heating unit adds with the output end of the rectification module and described first respectively
One end of hot cell is connected；
Second driver element, second driver element is connected with the other end of second heating unit, to drive described
Two heating units；
Wherein, the control module is connected to control second heating unit to carry out with the control end of second driver element
Heating stops heating.
5. the heating control circuit of Electromagnetic Heating cooker according to claim 4, it is characterised in that described second
Driver element includes：
4th resistance, one end of the 4th resistance is connected with the control module；
3rd switching tube, the base stage of the 3rd switching tube is connected with the other end of the 4th resistance, the 3rd switching tube
Colelctor electrode be connected with default power supply；
5th resistance, one end of the 5th resistance is connected with the emitter stage of the 3rd switching tube；
6th resistance, one end of the 6th resistance and the other end of the 5th resistance are grounded, the 6th resistance it is another
End ground connection, has Section Point between the 5th resistance and the 6th resistance；
4th switching tube, the base stage of the 4th switching tube is connected with the Section Point, the colelctor electrode of the 4th switching tube
It is connected with the other end of second heating unit, the grounded emitter of the 4th switching tube.
6. the heating control circuit of Electromagnetic Heating cooker according to claim 4, it is characterised in that described first
Heating unit is arranged on the top of the Electromagnetic Heating cooker, and second heating unit is arranged on the Electromagnetic Heating and cooked
Prepare food the side wall of device.
7. the heating control circuit of Electromagnetic Heating cooker according to claim 4, it is characterised in that described first
Heating unit and second heating unit are heating resistance wire.
8. the heating control circuit of Electromagnetic Heating cooker according to claim 1, it is characterised in that described first
Zero crossing is located at second zero crossing in the same half wave cycles of the alternating current.
9. a kind of Electromagnetic Heating cooker, it is characterised in that including the electromagnetism according to any one of claim 1-8
The heating control circuit of heating cooking device.
10. a kind of control of the heating control circuit of Electromagnetic Heating cooker according to any one of claim 1-8
Method, it is characterised in that comprise the following steps：
The zero crossing of AC power is detected to generate zero cross signal；
The first zero crossing control auxiliary heating module in the zero cross signal is carried out after heating electric discharge work, further according to institute
The second zero crossing output driving control signal in zero cross signal is stated to drive module to control main resonance heating module to be heated
Work.
11. the control method of the heating control circuit of Electromagnetic Heating cooker according to claim 10, its feature exists
In first zero crossing is located at the same half wave cycles for the alternating current that the AC power is provided with second zero crossing
It is interior.
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| CN201610121804.6A CN107155229B (en) | 2016-03-03 | 2016-03-03 | Electromagnetic heating cooking device and heating control circuit and control method thereof |
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|---|---|---|---|
| CN201610121804.6A CN107155229B (en) | 2016-03-03 | 2016-03-03 | Electromagnetic heating cooking device and heating control circuit and control method thereof |
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| CN107820341A (en) * | 2017-10-16 | 2018-03-20 | 赵玉奎 | Realize the circuit of IH electromagnetism laser heatings |
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| CN110278622A (en) * | 2019-07-26 | 2019-09-24 | 佛山市顺德区芯科电子有限公司 | A kind of control circuit that electromagnetic heating low-power continuously exports |
| CN110300470A (en) * | 2019-06-24 | 2019-10-01 | 深圳市驰创达科技有限公司 | Continuous low power IH heater circuit and its control method |
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