CN109548209A - A kind of circuit being exclusively used in sensing electromagnetic oven - Google Patents
A kind of circuit being exclusively used in sensing electromagnetic oven Download PDFInfo
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- CN109548209A CN109548209A CN201910005725.2A CN201910005725A CN109548209A CN 109548209 A CN109548209 A CN 109548209A CN 201910005725 A CN201910005725 A CN 201910005725A CN 109548209 A CN109548209 A CN 109548209A
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- 238000001514 detection method Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
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- 238000000034 method Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
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- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 4
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- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 3
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 description 3
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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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
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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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
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Abstract
The present invention relates to culinary art heating equipment fields, disclose a kind of circuit for being exclusively used in sensing electromagnetic oven.It creates through the invention, can provide one kind can reduce circuit complexity and reduces the novel sensing electromagnetic oven circuit of " race hazard " risk, pass through design logic circuit unit, can future autonomous control circuit unit pwm signal all the way be converted to the driving signal that two-way is synchronous and level is reciprocal, and pass through the synchronization amplification of IGBT half-bridge drive circuit, it can be to the top transistor and bottom transistor progress reciprocal ground on-off control in IGBT half-bridge circuit unit, and then it can not only reduce circuit complexity, the risk for occurring " race hazard " in reciprocal make and break process can also effectively be evaded, ensure finally can steadily generate magnetic confining field power in eddy current coil.In addition, the circuit also has many advantages, such as can to prevent rush of current, automatic heat radiation cooling, low in cost and be easily achieved, it is convenient for practical promotion and application.
Description
Technical field
The invention belongs to cook heating equipment field, and in particular to a kind of circuit for being exclusively used in sensing electromagnetic oven.
Background technique
Sensing electromagnetic oven be a kind of similar electromagnetic oven high frequency sensing heating equipment (its working frequency is generally audio, because
Without generating the electromagnetic wave broadband being harmful to the human body when in use), since it can disengage 0~3.5cm of cooking ware simultaneously
It realizes high-efficiency heating purpose, therefore the mountable bottom surface in chopping board for kitchen or dinner table board, keeps plate face neat and artistic and easy to clean,
Popular welcome by consumer.In the inside mainboard of existing sensing electromagnetic oven, it is common that generated by main control unit point
Two pwm signals that half-bridge circuit middle and upper part transistor and bottom transistor on-off Yong Yu not controlled and that level is reciprocal, to make
Electrically current collection-emitter both ends eddy current coil of parallel connection top transistor discontinuously generates countless with stronger through characteristic
Magnetic confining field power finally generates countless small vortex in the bottom of magnetizer (such as iron pot) using these magnetic confining field power, into
And make pot body voluntarily at a high speed fever and heating kettle in food.But the pwm signal reciprocal for two-way level, it needs to be respectively configured
Signal drives branch, not only increases the complexity of circuit structure, it is also possible to which existing causes due to different path delays of time on top
Occur " race hazard " risk in transistor and the reciprocal make and break process of bottom transistor, influences the generation of magnetic confining field power.
Summary of the invention
In order to solve the problems, such as that complexity present in existing sensing electromagnetic oven circuit is high and easy " race hazard ", this hair
It is bright to be designed to provide a kind of circuit for being exclusively used in sensing electromagnetic oven.
The technical scheme adopted by the invention is as follows:
A kind of circuit being exclusively used in sensing electromagnetic oven, including city's electrical connectors, EMI filter circuit unit, rectifier circuit
Unit, switching power circuit unit, IGBT half-bridge circuit unit, IGBT half-bridge drive circuit unit, logic circuit unit, master control
Circuit unit and eddy current coil processed, wherein the logic circuit unit includes first diode, the second diode, the three or two pole
Pipe, the 4th diode, first and door, second and door, third and door, the 4th and door, the first triode, first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, the IGBT half-bridge circuit unit include first
Igbt transistor, the second igbt transistor, the first inductance, first capacitor, the second capacitor and third capacitor；
The pwm signal input terminal of the main control circuit unit is electrically connected the cathode, described of the first diode
The anode of second diode, described second and the first input end of door and the anode of the third diode, the one or two pole
The anode of pipe is electrically connected the cathode of second diode and described first defeated with door with the input terminal of door, described first
Outlet is electrically connected described second and the first input end of door and the anode of the 4th diode, and described second is defeated with door
Outlet is electrically connected the first input end of the third and door, the cathode of the cathode of the third diode and the 4th diode
It is electrically connected one end of first resistor, the other end of the first resistor is electrically connected one end and the institute of the second resistance
The base stage of the first triode is stated, the collector of first triode is electrically connected one end and described of the 3rd resistor
Four with the second input terminal of door；
The enable signal input terminal of the main control circuit unit is electrically connected the described 5th by the 4th resistance
The first input end of one end of resistance, the second input terminal of the third and door and the described 4th and door, the third and door
Output end is electrically connected the first pulse signal output end of the IGBT half-bridge drive circuit unit by the 6th resistance, and the described 4th
The second pulse signal output end of the IGBT half-bridge drive circuit unit, institute are electrically connected by the 7th resistance with the output end of door
The other end of the other end and the 5th resistance of stating 3rd resistor is electrically connected the first high level current potential, the second resistance
The other end and the emitter of first triode be grounded respectively；
First driving signal output end of the IGBT half-bridge drive circuit unit is electrically connected first igbt transistor
Gate pole, the second driving signal output end of the IGBT half-bridge drive circuit unit is electrically connected second igbt transistor
Gate pole, the collector of first igbt transistor are electrically connected the high-potential output end of the rectifier circuit unit, institute
One end, one end of the third capacitor and one end of the eddy current coil of first capacitor are stated, first igbt transistor
Emitter is electrically connected the collector of second igbt transistor, one end of first inductance and the eddy current coil
The other end, the other end of first inductance be electrically connected the first capacitor the other end and second capacitor one
End, the other end difference of the emitter of second igbt transistor, the other end of second capacitor and the third capacitor
Ground connection；
City's electrical connectors, the EMI filter circuit unit and the rectifier circuit unit are sequentially connected electrically, described
The high-potential output end of rectifier circuit unit is electrically connected the switching power circuit unit.
Optimization, further include current detecting circuit unit and anti-rush of current circuit unit, wherein the current detecting electricity
Road unit includes current detecting chip, the 4th capacitor, the 8th resistance and the 9th resistance of model ACS712, the anti-electric current punching
Hitting circuit unit includes the first photo-coupler, the second triode, the 5th diode, the tenth resistance, eleventh resistor, the 12nd electricity
Resistance, thirteenth resistor and the first relay；
The pin 1 and 2 of the current detecting chip is electrically connected the other end of the third capacitor, the current detecting
The pin 3 and 4 of chip is electrically connected the low potential output end of the rectifier circuit unit, and the current detecting chip draws
Foot 5 is grounded, and by the 4th capacity earth, the pin 7 of the current detecting chip divides the pin 6 of the current detecting chip
It is not electrically connected one end of the 8th resistance and one end of the 9th resistance, the pin 8 of the current detecting chip is electrically connected
First high level current potential, the other end ground connection of the 8th resistance, the other end of the 9th resistance are electrically connected the main control
The first detection signal input terminal of circuit unit；
The first control signal output end of the main control circuit unit is electrically connected the light emitting source of first photo-coupler
The light emitting source anode of cathode, first photo-coupler is electrically connected the first high level current potential, the light of first photo-coupler
Device anode is electrically connected one end of the second high level current potential and the tenth resistance, and the light-receiving device of first photo-coupler is negative
Pole is electrically connected one end of the eleventh resistor, and the other end of the tenth resistance is electrically connected first relay
Path of winding one end and the 5th diode cathode, the path of winding other end of first relay is electrically connected
The anode of 5th diode and the collector of second triode, the other end of the eleventh resistor are electrically connected
The base stage of second triode and one end of the twelfth resistor, the emitter of second triode and the described 12nd
The other end of resistance is grounded respectively；
The switching branches of first relay are in parallel with the thirteenth resistor and are connected on positioned at the EMI filtered electrical
On zero curve between road unit and the rectifier circuit unit.
Optimization, further include temperature sensing circuit unit, fan drive circuit unit and fan, wherein the temperature inspection
Slowdown monitoring circuit unit includes the first NTC resistance for being arranged in the IGBT half-bridge circuit unit, for being arranged in the whirlpool
The 2nd NTC resistance, the 14th resistance, the 15th resistance, the 6th diode and the 7th diode immediately below streamline circle, the wind
Fanning drive circuit unit includes the second photo-coupler, the 16th resistance, the 17th resistance, the first field-effect tube and the eight or two pole
Pipe；
One end of the first NTC resistance is electrically connected the first high level current potential, the other end difference of the first NTC resistance
It is electrically connected one end of the 14th resistance and the anode of the 6th diode, one end electrical connection of the 2nd NTC resistance
First high level current potential, the other end of the 2nd NTC resistance are electrically connected one end and described of the 15th resistance
The anode of seven diodes, the other end of the 14th resistance and the other end of the 15th resistance are grounded respectively, and described
The cathode of the cathode of six diodes and the 7th diode is electrically connected the second detection letter of the main control circuit unit
Number input terminal；
The second control signal output end of the main control circuit unit is electrically connected the light emitting source of second photo-coupler
The light emitting source anode of cathode, second photo-coupler is electrically connected the first high level current potential, the light of second photo-coupler
Device anode is electrically connected third high level current potential, and the light-receiving device cathode of second photo-coupler is electrically connected the 16th resistance
One end, the other end of the 16th resistance be electrically connected the 17th resistance one end and first field-effect tube
Grid, the drain electrode of first field-effect tube are electrically connected the anode of the 8th diode, the cathode electricity of the 8th diode
Third high level current potential is connected, the other end of the 17th resistance and the source electrode of first field-effect tube are grounded respectively, institute
It is electrically in parallel with the fan to state the 8th diode.
Further specifically, the fan includes the first wind for being arranged in immediately below the IGBT half-bridge circuit unit
Fan and the second fan for being arranged in immediately below the eddy current coil.
Optimization, further include voltage detecting circuit unit, wherein the voltage detecting circuit unit includes the 18th electricity
Resistance, the 19th resistance, the 20th resistance and third photo-coupler；One end of 18th resistance is electrically connected the rectifier bridge electricity
The high-potential output end of road unit, the other end of the 18th resistance are electrically connected the light emitting source sun of the third photo-coupler
The light-receiving device anode electrical connection first of pole, the light emitting source minus earth of the third photo-coupler, the third photo-coupler is high
Level potential, the light-receiving device cathode of the third photo-coupler are electrically connected one end and described second of the 19th resistance
One end of ten resistance, the other end ground connection of the 19th resistance, the other end of the 20th resistance are electrically connected the master control
The third of circuit unit processed detects signal input part.Specifically, the 18th resistance is formed by multiple resistance electrical series.
Optimization, further include control panel circuit unit and/or the line control machine master for being electrically connected the main control circuit unit
Plate circuit unit.
Specifically, the main control circuit unit using model STC11Fxx DIP/SoP-20 singlechip chip and
Its peripheral circuit.
Specifically, the IGBT half-bridge drive circuit unit is using the half-bridge driven chip of model IR22141 and its outer
Enclose circuit.
Specifically, described first is integrated in model with door with door, the third and door and the described 4th with door, described second
For in four and the door integrated chip of 74LS08.
The invention has the benefit that
(1) the invention provides one kind and can reduce circuit complexity and reduce the novel of " race hazard " risk
Sense electromagnetic oven circuit, i.e., by design logic circuit unit, can future autonomous control circuit unit pwm signal all the way turn
It is changed to the driving signal that two-way is synchronous and level is reciprocal, and passes through the synchronization amplification of IGBT half-bridge drive circuit, it can be right
Top transistor and bottom transistor in IGBT half-bridge circuit unit carry out the control of reciprocal ground on-off, and then can not only reduce
Circuit complexity can also effectively evade the risk for occurring " race hazard " in reciprocal make and break process, it is ensured that be finally vortexed
Magnetic confining field power can be steadily generated in coil；
(2) circuit, which also has, can prevent rush of current, automatic heat radiation cooling, low in cost and be easily achieved etc. excellent
Point is convenient for practical promotion and application.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the circuit principle structure schematic diagram provided by the invention for being exclusively used in sensing electromagnetic oven.
Fig. 2 is the physical circuit figure of first part provided by the invention.
Fig. 3 is the physical circuit figure of second part provided by the invention.
Fig. 4 is the physical circuit figure of Part III provided by the invention.
Fig. 5 is the exemplary diagram of main signal waveform provided by the invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further elaborated.It should be noted that for this
The explanation of a little way of example is used to help understand the present invention, but and does not constitute a limitation of the invention.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A, individualism B exist simultaneously tri- kinds of situations of A and B, the terms
"/and " it is to describe another affiliated partner relationship, indicate may exist two kinds of relationships, for example, A/ and B, can indicate: individually depositing
In A, two kinds of situations of individualism A and B, in addition, character "/" herein, typicallying represent forward-backward correlation object is a kind of "or" pass
System.
Embodiment one
As shown in Fig. 1~5, the circuit for being exclusively used in sensing electromagnetic oven provided in this embodiment, including city's electrical connectors,
EMI filter circuit unit, rectifier circuit unit, switching power circuit unit, IGBT half-bridge circuit unit, IGBT half-bridge driven
Circuit unit, logic circuit unit, main control circuit unit and eddy current coil, wherein the logic circuit unit includes first
Diode D1, the second diode D2, third diode D3, the 4th diode D4, first and door AND1, second with door AND2, the
Three with door AND3, the 4th and door AND4, the first triode BJT1, first resistor R1, second resistance R2,3rd resistor R3, the 4th
Resistance R4, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, the IGBT half-bridge circuit unit include the first IGBT crystal
Pipe IBGT1, the second igbt transistor IGBT2, the first inductance L1, first capacitor C1, the second capacitor C2 and third capacitor C3.
The pwm signal input terminal PWM of the main control circuit unit be electrically connected the first diode D1 cathode,
The anode of the second diode D2, described second and the first input end of door AND2 and the anode of the third diode D3,
The anode of the first diode D1 is electrically connected the input of the cathode and described first and door AND of the second diode D
End, described first is electrically connected the first input end and the described 4th 2 of described second Yu door AND2 with the output end of door AND1
The anode of pole pipe D4, described second is electrically connected the first input end of the third Yu door AND3 with the output end of door AND2, described
The cathode of the cathode of third diode D3 and the 4th diode D4 are electrically connected one end of first resistor R1, and described first
The other end of resistance R1 is electrically connected one end of the second resistance R2 and the base stage of the first triode BJT1, and described
The collector of one triode BJT1 be electrically connected the 3rd resistor R3 one end and the described 4th with it is the second of door AND4 defeated
Enter end.
The enable signal input terminal ENABLE of the main control circuit unit is electrically connected by the 4th resistance R4
The first input of one end of the 5th resistance R5, the second input terminal of the third and door AND3 and the described 4th and door AND3
End, the third are electrically connected the first of the IGBT half-bridge drive circuit unit by the 6th resistance R6 with the output end of door AND3
Pulse signal output end INHS+, the described 4th is electrically connected the IGBT half-bridge by the 7th resistance R7 with the output end of door AND4
Second pulse signal output end INLS+ of drive circuit unit, the other end of the 3rd resistor R3 and the 5th resistance R5
The other end be electrically connected the first high level current potential 5V, the other end of the second resistance R2 and the first triode BJT1
Emitter be grounded respectively.
First driving signal output end IGBT_H of the IGBT half-bridge drive circuit unit is electrically connected the first IGBT
Second driving signal output end IGBT_L of the gate pole of transistor IBGT1, the IGBT half-bridge drive circuit unit is electrically connected institute
The gate pole of the second igbt transistor IBGT2 is stated, the collector of the first igbt transistor IBGT1 is electrically connected the rectification
The high-potential output end HV+/VBUS of bridge circuit unit, one end of the first capacitor C1, the third capacitor C3 one end and
The emitter of one end of the eddy current coil, the first igbt transistor IBGT1 is electrically connected the 2nd IGBT crystal
The other end of the collector of pipe IBGT2, one end VHS of the first inductance L1 and the eddy current coil, the first inductance L1
The other end be electrically connected the other end of the first capacitor C1 and one end of the second capacitor C2, the 2nd IGBT is brilliant
The other end of the emitter of body pipe IBGT2, the other end of second capacitor and the third capacitor C3 is grounded respectively.
City's electrical connectors, the EMI filter circuit unit and the rectifier circuit unit are sequentially connected electrically, described
The high-potential output end HV+/VBUS of rectifier circuit unit is electrically connected the switching power circuit unit.
As shown in Fig. 1~5, in the physical circuit for being exclusively used in sensing electromagnetic oven, city's electrical connectors are for leading
Enter external communication alternating current.EMI (Electro Magnetic Interference, electromagnetic interference) the filter circuit unit is used
In realizing EMI Filtering, high frequency spurious signal is filtered out, available circuit as shown in Figure 2 is used to realize.The rectifier bridge
Circuit unit is used to arrange in alternating current, and available circuit realization as shown in Figure 2 can also be used for direct current.The switch electricity
Source circuit unit is used to be converted to DC voltage multistage different burning voltages, such as the high level current potential of 5V, 15V and 18V etc.,
It is supported to provide electric energy for other circuit units, available circuit as described in Figure 4 can be used and realize.The IGBT
(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) half-bridge circuit unit is same as periodicity
The power supply branch break-make situation of the eddy current coil is controlled, to make the eddy current coil discontinuously generate magnetic confining field power.Institute
State main control circuit unit for export stable PWM (Pulse Width Modulation, pulse width modulation) signal with
And enable signal, it can be, but not limited to the singlechip chip and its periphery electricity using model STC11Fxx DIP/SoP-20
Road.The logic circuit unit is for realizing control logic as shown in Figure 5, i.e., by one from the main control circuit unit
Road pwm signal is converted to the driving signal that two-way is synchronous and level is reciprocal, therein described first with door AND1, described second with
Door AND2, the third and door AND3 and the described 4th and door AND4 can be, but not limited to be integrated in the four of model 74LS08 with
In door integrated chip.The IGBT half-bridge drive circuit unit is used to synchronize two-way driving signal amplification, and then realizes
To in the IGBT half-bridge circuit unit top transistor and bottom transistor carry out reciprocal ground on-off control purpose, can be with
But it is not limited to using the half-bridge driven chip and its peripheral circuit of model IR22141 as shown in Figure 3 or other available circuits
It realizes.From there through aforementioned circuit structure, circuit complexity can be not only reduced, can also effectively be evaded in reciprocal make and break process
The middle risk for " race hazard " occur, it is ensured that magnetic confining field power finally can be steadily generated in eddy current coil.
Optimization, further include current detecting circuit unit and anti-rush of current circuit unit, wherein the current detecting electricity
Road unit includes current detecting chip U3, the 4th capacitor C4, the 8th resistance R8 and the 9th resistance R9 of model ACS712, described
Anti- rush of current circuit unit includes the first photo-coupler GOQ1, the second triode BJT2, the 5th diode D5, the tenth resistance
R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13 and the first relay JDQ1.
The pin 1 and 2 (AMP+) of the current detecting chip U3 is electrically connected the other end of the third capacitor C3, institute
The pin 3 and 4 (AMP-) for stating current detecting chip U3 is electrically connected the low potential output end of the rectifier circuit unit
The pin 5 of HV-, the current detecting chip U3 are grounded, and the pin 6 of the current detecting chip U3 passes through the 4th capacitor C4
Ground connection, the pin 7 of the current detecting chip U3 be electrically connected the 8th resistance R8 one end and the 9th resistance R9
One end, the pin 8 of the current detecting chip U3 is electrically connected the first high level current potential 5V, the other end of the 8th resistance R8
Ground connection, the other end of the 9th resistance R9 are electrically connected the first detection signal input terminal I_ of the main control circuit unit
sensor。
The first control signal output end Relay of the main control circuit unit is electrically connected the first photo-coupler GOQ1
Light emitting source cathode, light emitting source anode electrical connection the first high level current potential 5V of the first photo-coupler GOQ1, described first
The light-receiving device anode of photo-coupler GOQ1 is electrically connected one end of the second high level current potential 15V and the tenth resistance R10, institute
The light-receiving device cathode for stating the first photo-coupler GOQ1 is electrically connected one end of the eleventh resistor R11, the tenth resistance
The other end of R10 is electrically connected path of winding one end of the first relay JDQ1 and the yin of the 5th diode D5
Pole, the path of winding other end of the first relay JDQ1 are electrically connected the anode and described of the 5th diode D5
The collector of two triode BJT2, the other end of the eleventh resistor R11 are electrically connected the second triode BJT2's
One end of base stage and the twelfth resistor R12, the emitter of the second triode BJT2 and the twelfth resistor R12's
The other end is grounded respectively.
The switching branches of the first relay JDQ1 are in parallel with the thirteenth resistor R13 and are connected on positioned at described
On zero curve N between EMI filter circuit unit and the rectifier circuit unit.
As illustrated in fig. 1 and 2, the current detecting circuit unit is used to detect the output direct current of the rectifier circuit unit
Size judges whether dash current occur so that the main control circuit unit is based on existing program.The anti-rush of current electricity
Road unit is used under the control of the main control circuit unit, once there are dash currents for discovery, ends described first immediately
The path of winding of relay JDQ1 disconnects the switching branches of the first relay JDQ1, and then by promoting current-limiting resistance
The mode output end that is limited in the rectifier circuit unit there is dash current.
Optimization, further include temperature sensing circuit unit, fan drive circuit unit and fan, wherein the temperature inspection
Slowdown monitoring circuit unit includes the first NTC resistance NTC1 for being arranged in the IGBT half-bridge circuit unit, for being arranged in
State the 2nd NTC resistance NTC2 immediately below eddy current coil, the 14th resistance R14, the 15th resistance R15, the 6th diode D6 and
7th diode D7, the fan drive circuit unit include the second photo-coupler GOQ2, the 16th resistance R16, the 17th electricity
Hinder R17, the first field-effect tube JFET1 and the 8th diode D8.
One end of the first NTC resistance NTC1 is electrically connected the first high level current potential 5V, the first NTC resistance NTC1's
The other end is electrically connected one end of the 14th resistance R14 and the anode of the 6th diode D6, the 2nd NTC electricity
The one end for hindering NTC2 is electrically connected the first high level current potential 5V, and the other end of the 2nd NTC resistance NTC2 is electrically connected described
The anode of one end of the 15th resistance R15 and the 7th diode D7, the other end of the 14th resistance R14 and described
The other end of 15 resistance R15 is grounded respectively, the cathode of the 6th diode D6 and the cathode point of the 7th diode D7
It is not electrically connected the second detection signal input part NTC of the main control circuit unit.
The second control signal output end FAN of the main control circuit unit is electrically connected the second photo-coupler GOQ2's
The light emitting source anode of light emitting source cathode, the second photo-coupler GOQ2 is electrically connected the first high level current potential 5V, second light
The light-receiving device anode of coupler GOQ2 is electrically connected third high level current potential 18V, and the light-receiving device of the second photo-coupler GOQ2 is negative
Pole is electrically connected one end of the 16th resistance R16, and the other end of the 16th resistance R16 is electrically connected the described 17th
The grid of one end of resistance R17 and the first field-effect tube JFET1, the drain electrode electrical connection of the first field-effect tube JFET1
The anode of the 8th diode D8, the cathode of the 8th diode D8 are electrically connected third high level current potential 18V, and the described tenth
The source electrode of the other end of seven resistance R17 and the first field-effect tube JFET1 are grounded respectively, the 8th diode D8 with it is described
Fan is electrically in parallel.
As shown in figs. 1 and 3, by previous designs, the IGBT half-bridge circuit unit and the vortex can be monitored respectively
Temperature environment around coil can start the fan and radiate once discovery has the temperature at one excessively high.Further tool
Body, in order to realize the purpose that independently radiates, the fan include for being arranged in the IGBT half-bridge circuit unit just under
The first square fan FAN1 and the second fan FAN2 for being arranged in immediately below the eddy current coil.
Optimization, further include voltage detecting circuit unit, wherein the voltage detecting circuit unit includes the 18th resistance
R18, the 19th resistance R19, the 20th resistance R20 and third photo-coupler GOQ3；One end of the 18th resistance R18 is electrically connected
Meet the other end electrical connection institute of the high-potential output end HV+/VBUS, the 18th resistance R18 of the rectifier circuit unit
State the light emitting source anode of third photo-coupler GOQ3, the light emitting source minus earth of the third photo-coupler GOQ3, the third
The light-receiving device that the light-receiving device anode of photo-coupler GOQ3 is electrically connected the first high level current potential 5V, the third photo-coupler GOQ3 is negative
Pole is electrically connected one end of the 19th resistance R19 and one end of the 20th resistance R20, the 19th resistance
The other end of R19 is grounded, and the other end of the 20th resistance R20 is electrically connected the third detection letter of the main control circuit unit
Number input terminal V-detect.Specifically, the 18th resistance R18 is formed by multiple resistance electrical series.
Optimization, further include control panel circuit unit and/or the line control machine master for being electrically connected the main control circuit unit
Plate circuit unit.As shown in Figure 1, the control panel circuit unit and the line control machine motherboard circuit unit are respectively used in hand
Movement generates corresponding control instruction, such as enabled instruction, firepower regulating command or temperature adjustment instructions etc. with lower, they can divide
It Cai Yong not available circuit realization.
To sum up, it using the circuit for being exclusively used in sensing electromagnetic oven provided by the present embodiment, has the following technical effect that
(1) present embodiments providing one kind can reduce circuit complexity and reduces the novel biography of " race hazard " risk
Feel electromagnetic oven circuit, i.e., by design logic circuit unit, can future autonomous control circuit unit the conversion of pwm signal all the way
For the driving signal that two-way is synchronous and level is reciprocal, and pass through the synchronization amplification of IGBT half-bridge drive circuit, it can be right
Top transistor and bottom transistor in IGBT half-bridge circuit unit carry out the control of reciprocal ground on-off, and then can not only reduce
Circuit complexity can also effectively evade the risk for occurring " race hazard " in reciprocal make and break process, it is ensured that be finally vortexed
Magnetic confining field power can be steadily generated in coil；
(2) circuit, which also has, can prevent rush of current, automatic heat radiation cooling, low in cost and be easily achieved etc. excellent
Point is convenient for practical promotion and application.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (10)
1. a kind of circuit for being exclusively used in sensing electromagnetic oven, it is characterised in that: including city's electrical connectors, EMI filter circuit unit, whole
Flow bridge circuit unit, switching power circuit unit, IGBT half-bridge circuit unit, IGBT half-bridge drive circuit unit, logic circuit
Unit, main control circuit unit and eddy current coil, wherein the logic circuit unit includes first diode (D1), the two or two
Pole pipe (D2), third diode (D3), the 4th diode (D4), first and door (AND1), second and door (AND2), third and door
(AND3), the 4th with door (AND4), the first triode (BJT1), first resistor (R1), second resistance (R2), 3rd resistor
(R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6) and the 7th resistance (R7), the IGBT half-bridge circuit list
Member include the first igbt transistor (IBGT1), the second igbt transistor (IGBT2), the first inductance (L1), first capacitor (C1),
Second capacitor (C2) and third capacitor (C3)；
The pwm signal input terminal (PWM) of the main control circuit unit be electrically connected the first diode (D1) cathode,
The anode of second diode (D2), described second with the first input end of door (AND2) and the third diode (D3)
Anode, the anode of the first diode (D1) are electrically connected the cathode and described first and door of second diode (D)
(AND) input terminal, described first with the output end of door (AND1) be electrically connected described second with it is the first of door (AND2) defeated
Enter the anode of end and the 4th diode (D4), described second is electrically connected the third and door with the output end of door (AND2)
(AND3) first input end, the cathode of the third diode (D3) and the cathode of the 4th diode (D4) are electrically connected respectively
One end of first resistor (R1) is connect, the other end of the first resistor (R1) is electrically connected one end of the second resistance (R2)
With the base stage of first triode (BJT1), the collector of first triode (BJT1) is electrically connected the third electricity
Hinder (R3) one end and the described 4th with second input terminal of door (AND4)；
The enable signal input terminal (ENABLE) of the main control circuit unit is electrically connected by the 4th resistance (R4)
The of one end of 5th resistance (R5), the second input terminal of the third and door (AND3) and the described 4th and door (AND3)
One input terminal, the third are electrically connected the IGBT half-bridge drive circuit by the 6th resistance (R6) with the output end of door (AND3)
The first pulse signal output end (INHS+) of unit, the described 4th is electric by the 7th resistance (R7) with the output end of door (AND4)
Connect the second pulse signal output end (INLS+) of the IGBT half-bridge drive circuit unit, the 3rd resistor (R3) it is another
The other end of one end and the 5th resistance (R5) is electrically connected the first high level current potential (5V), the second resistance (R2)
The emitter of the other end and first triode (BJT1) is grounded respectively；
It is brilliant that the first driving signal output end (IGBT_H) of the IGBT half-bridge drive circuit unit is electrically connected the first IGBT
The gate pole of body pipe (IBGT1), the second driving signal output end (IGBT_L) electrical connection of the IGBT half-bridge drive circuit unit
The collector of the gate pole of second igbt transistor (IBGT2), first igbt transistor (IBGT1) is electrically connected institute
State the high-potential output end (HV+/VBUS) of rectifier circuit unit, one end of the first capacitor (C1), the third capacitor
(C3) emitter of one end of one end and the eddy current coil, first igbt transistor (IBGT1) is electrically connected institute
State the another of the collector of the second igbt transistor (IBGT2), one end (VHS) of first inductance (L1) and the eddy current coil
One end, the other end of first inductance (L1) are electrically connected the other end and second capacitor of the first capacitor (C1)
(C2) one end, the emitter of second igbt transistor (IBGT2), the other end of second capacitor and third electricity
The other end for holding (C3) is grounded respectively；
City's electrical connectors, the EMI filter circuit unit and the rectifier circuit unit are sequentially connected electrically, the rectification
The high-potential output end (HV+/VBUS) of bridge circuit unit is electrically connected the switching power circuit unit.
2. a kind of circuit for being exclusively used in sensing electromagnetic oven as described in claim 1, it is characterised in that: further include current detecting electricity
Road unit and anti-rush of current circuit unit, wherein the current detecting circuit unit includes the electric current inspection of model ACS712
Surveying chip (U3), the 4th capacitor (C4), the 8th resistance (R8) and the 9th resistance (R9), the anti-rush of current circuit unit includes
First photo-coupler (GOQ1), the second triode (BJT2), the 5th diode (D5), the tenth resistance (R10), eleventh resistor
(R11), twelfth resistor (R12), thirteenth resistor (R13) and the first relay (JDQ1)；
The pin 1 and 2 (AMP+) of the current detecting chip (U3) is electrically connected the other end of the third capacitor (C3), institute
The pin 3 and 4 (AMP-) for stating current detecting chip (U3) is electrically connected the low potential output end of the rectifier circuit unit
(HV-), the pin 5 of the current detecting chip (U3) is grounded, and the pin 6 of the current detecting chip (U3) passes through the described 4th
Capacitor (C4) ground connection, the pin 7 of the current detecting chip (U3) are electrically connected one end and the institute of the 8th resistance (R8)
One end of the 9th resistance (R9) is stated, the pin 8 of the current detecting chip (U3) is electrically connected the first high level current potential (5V), described
The other end of 8th resistance (R8) is grounded, and the other end of the 9th resistance (R9) is electrically connected the of the main control circuit unit
One detection signal input part (I_sensor)；
The first control signal output end (Relay) of the main control circuit unit is electrically connected first photo-coupler (GOQ1)
Light emitting source cathode, the light emitting source anode of first photo-coupler (GOQ1) is electrically connected the first high level current potential (5V), described
The light-receiving device anode of first photo-coupler (GOQ1) is electrically connected the second high level current potential (15V) and the tenth resistance
(R10) the light-receiving device cathode of one end, first photo-coupler (GOQ1) is electrically connected the eleventh resistor (R11)
One end, the other end of the tenth resistance (R10) be electrically connected first relay (JDQ1) path of winding one end and
The cathode of 5th diode (D5), the path of winding other end of first relay (JDQ1) are electrically connected described
The collector of the anode of five diodes (D5) and second triode (BJT2), the other end of the eleventh resistor (R11)
It is electrically connected the base stage of second triode (BJT2) and one end of the twelfth resistor (R12), the two or three pole
The other end of the emitter and the twelfth resistor (R12) of managing (BJT2) is grounded respectively；
The switching branches of first relay (JDQ1) are in parallel with the thirteenth resistor (R13) and are connected on positioned at described
On zero curve (N) between EMI filter circuit unit and the rectifier circuit unit.
3. a kind of circuit for being exclusively used in sensing electromagnetic oven as described in claim 1, it is characterised in that: further include temperature detection electricity
Road unit, fan drive circuit unit and fan, wherein the temperature sensing circuit unit includes for being arranged in the IGBT
The first NTC resistance (NTC1), the 2nd NTC resistance for being arranged in immediately below the eddy current coil in half-bridge circuit unit
(NTC2), the 14th resistance (R14), the 15th resistance (R15), the 6th diode (D6) and the 7th diode (D7), the wind
Fanning drive circuit unit includes the second photo-coupler (GOQ2), the 16th resistance (R16), the 17th resistance (R17), first effect
(JFET1) and the 8th diode (D8) should be managed；
One end of the first NTC resistance (NTC1) is electrically connected the first high level current potential (5V), the first NTC resistance (NTC1)
The other end be electrically connected one end of the 14th resistance (R14) and the anode of the 6th diode (D6), described
One end of two NTC resistance (NTC2) is electrically connected the first high level current potential (5V), the other end point of the 2nd NTC resistance (NTC2)
It is not electrically connected one end of the 15th resistance (R15) and the anode of the 7th diode (D7), the 14th resistance
(R14) other end of the other end and the 15th resistance (R15) is grounded respectively, the cathode of the 6th diode (D6) and
The cathode of 7th diode (D7) is electrically connected the second detection signal input part of the main control circuit unit
(NTC)；
The second control signal output end (FAN) of the main control circuit unit is electrically connected second photo-coupler (GOQ2)
Light emitting source cathode, the light emitting source anode of second photo-coupler (GOQ2) are electrically connected the first high level current potential (5V), and described the
The light-receiving device anode of two photo-couplers (GOQ2) is electrically connected third high level current potential (18V), second photo-coupler (GOQ2)
Light-receiving device cathode be electrically connected one end of the 16th resistance (R16), the other end of the 16th resistance (R16) electricity respectively
Connect one end of the 17th resistance (R17) and the grid of first field-effect tube (JFET1), first field-effect tube
(JFET1) drain electrode is electrically connected the anode of the 8th diode (D8), the cathode electrical connection of the 8th diode (D8) the
Three high level current potentials (18V), the other end of the 17th resistance (R17) and the source electrode of first field-effect tube (JFET1)
It is grounded respectively, the 8th diode (D8) is electrically in parallel with the fan.
4. a kind of circuit for being exclusively used in sensing electromagnetic oven as claimed in claim 3, it is characterised in that: the fan includes being used for
The first fan (FAN1) for being arranged in immediately below the IGBT half-bridge circuit unit and for being arranged in the eddy current coil just under
The second fan (FAN2) of side.
5. a kind of circuit for being exclusively used in sensing electromagnetic oven as claimed in claim 1 or 2, it is characterised in that: further include voltage inspection
Slowdown monitoring circuit unit, wherein the voltage detecting circuit unit includes the 18th resistance (R18), the 19th resistance (R19), second
Ten resistance (R20) and third photo-coupler (GOQ3)；
One end of 18th resistance (R18) be electrically connected the rectifier circuit unit high-potential output end (HV+/
VBUS), the other end of the 18th resistance (R18) is electrically connected the light emitting source anode of the third photo-coupler (GOQ3), institute
State the light emitting source minus earth of third photo-coupler (GOQ3), the light-receiving device anode electrical connection of the third photo-coupler (GOQ3)
The light-receiving device cathode of first high level current potential (5V), the third photo-coupler (GOQ3) is electrically connected the 19th resistance
(R19) one end of one end and the 20th resistance (R20), the other end ground connection of the 19th resistance (R19), described the
The other end of 20 resistance (R20) is electrically connected third detection signal input part (V-detect) of the main control circuit unit.
6. a kind of circuit for being exclusively used in sensing electromagnetic oven as claimed in claim 5, it is characterised in that: the 18th resistance
(R18) it is formed by multiple resistance electrical series.
7. a kind of circuit for being exclusively used in sensing electromagnetic oven as described in claim 1, it is characterised in that: further include described in electrical connection
The control panel circuit unit and/or line control machine motherboard circuit unit of main control circuit unit.
8. a kind of circuit for being exclusively used in sensing electromagnetic oven as described in claim 1, it is characterised in that: the main control circuit list
Member uses the singlechip chip and its peripheral circuit of model STC11Fxx DIP/SoP-20.
9. a kind of circuit for being exclusively used in sensing electromagnetic oven as described in claim 1, it is characterised in that: the IGBT half-bridge driven
Circuit unit uses the half-bridge driven chip and its peripheral circuit of model IR22141.
10. a kind of circuit for being exclusively used in sensing electromagnetic oven as described in claim 1, it is characterised in that: described first and door
(AND1), described second model is integrated in door (AND4) with door (AND2), the third and door (AND3) and the described 4th
In four and the door integrated chip of 74LS08.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005725.2A CN109548209B (en) | 2019-01-03 | 2019-01-03 | Circuit special for sensing induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005725.2A CN109548209B (en) | 2019-01-03 | 2019-01-03 | Circuit special for sensing induction cooker |
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| CN109548209A true CN109548209A (en) | 2019-03-29 |
| CN109548209B CN109548209B (en) | 2024-03-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310962Y (en) * | 2008-10-13 | 2009-09-16 | 周卫国 | IGBT (Insulated Gate Bipolar Transistor) protection device of induction cooker |
| WO2010142190A1 (en) * | 2009-06-08 | 2010-12-16 | 深圳市鑫汇科科技有限公司 | Large power electromagnetic cooker circuit based on system-on-chip (soc) |
| CN103606897A (en) * | 2013-12-02 | 2014-02-26 | 扬州万方电子技术有限责任公司 | Uninterruptible power supply over-current protection circuit |
| CN204131763U (en) * | 2014-09-30 | 2015-01-28 | 深圳市鑫汇科股份有限公司 | A kind of half-bridge multiple head switches Electromechanically heating controller |
| WO2016019642A1 (en) * | 2014-08-07 | 2016-02-11 | 中兴通讯股份有限公司 | Device for preventing current from flowing backward |
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2019
- 2019-01-03 CN CN201910005725.2A patent/CN109548209B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310962Y (en) * | 2008-10-13 | 2009-09-16 | 周卫国 | IGBT (Insulated Gate Bipolar Transistor) protection device of induction cooker |
| WO2010142190A1 (en) * | 2009-06-08 | 2010-12-16 | 深圳市鑫汇科科技有限公司 | Large power electromagnetic cooker circuit based on system-on-chip (soc) |
| CN103606897A (en) * | 2013-12-02 | 2014-02-26 | 扬州万方电子技术有限责任公司 | Uninterruptible power supply over-current protection circuit |
| WO2016019642A1 (en) * | 2014-08-07 | 2016-02-11 | 中兴通讯股份有限公司 | Device for preventing current from flowing backward |
| CN204131763U (en) * | 2014-09-30 | 2015-01-28 | 深圳市鑫汇科股份有限公司 | A kind of half-bridge multiple head switches Electromechanically heating controller |
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| Publication number | Publication date |
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| CN109548209B (en) | 2024-03-08 |
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