CN207150872U - Electromagnetic Heating control circuit and electromagnetic heating apparatus - Google Patents
Electromagnetic Heating control circuit and electromagnetic heating apparatus Download PDFInfo
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- CN207150872U CN207150872U CN201720543383.6U CN201720543383U CN207150872U CN 207150872 U CN207150872 U CN 207150872U CN 201720543383 U CN201720543383 U CN 201720543383U CN 207150872 U CN207150872 U CN 207150872U
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Abstract
The utility model discloses a kind of Electromagnetic Heating control circuit and electromagnetic heating apparatus, the Electromagnetic Heating control circuit includes being used for the power supply module that the AC power of AC power input is converted into dc source, the parallel resonance module and IGBT being connected successively with power supply module, control the control module of IGBT work, surge detection module and switch discharge module, the test side of surge detection module is connected with AC power, the output end of surge detection module and the signal receiving end of control module are connected with the output end of surge detection module, first control terminal of control module and IGBT gate pole connect；Second control terminal of control module is connected with the controlled end of switch discharge module, and the input of switch discharge module and IGBT colelctor electrode connect.The utility model is avoided because the surge energy in electromagnetic heating apparatus is too high, causes the energy on IGBT too high and breakdown, and then is occurred the problem of cause electromagnetic heating apparatus easy operational failure.
Description
Technical field
Electronic circuit technology field is the utility model is related to, more particularly to a kind of Electromagnetic Heating control circuit and Electromagnetic Heating
Equipment.
Background technology
In daily life, user is heated using electromagnetic heating apparatus to heated object mostly.Electromagnetism adds
Surge detection circuit is typically provided with hot equipment, when surge detection electric circuit inspection surge occurs to civil power envelope, can be triggered
PPG (programmable pulse generator) control module of master controller stops output PPG pulse signals to control in electromagnetic heating apparatus
IGBT shut-offs in electromagnetic heating apparatus processed, so that electromagnetic heating apparatus stops heating work, and then suppress surging signal to electricity
Magnetic heating system produces interference, avoids the IGBT in electromagnetic heating apparatus and other components from being damaged.
But now the surge energy in electromagnetic heating apparatus has been flushed to very high, then turns off IGBT and can not avoid
IGBT and then causes the easy operational failure of electromagnetic heating apparatus because the problem of the too high and breakdown energy on colelctor electrode.
Utility model content
Main purpose of the present utility model is to propose a kind of Electromagnetic Heating control circuit and electromagnetic heating apparatus, it is intended to is solved
The problem of surging signal in the mains supply causes the IGBT in electromagnetic heating apparatus impaired.
To achieve the above object, the utility model proposes a kind of Electromagnetic Heating control circuit, including for by input
AC power is converted into power supply module, the parallel resonance module being connected successively with the power supply module and the IGBT of dc source,
And the control module of the control IGBT work, the Electromagnetic Heating control circuit also includes surge detection module and switch is put
Electric module, the test side of the surge detection module are connected with the AC power, the output end of the surge detection module with
The signal receiving end connection of the control module, the first control terminal of the control module are connected with the gate pole of the IGBT；Institute
The second control terminal for stating control module is connected with the controlled end of the switch discharge module, the input of the switch discharge module
It is connected with the colelctor electrode of the IGBT；Wherein,
The surge detection module, for detecting the voltage signal of the AC power, and export corresponding surge detection
Signal；
The control module, for when receiving the surge detection signal, controlling the IGBT to be stopped, simultaneously
Export discharge control signal；
The switch discharge module, for being opened when receiving the discharge control signal, by the parallel resonance
The electric energy of module storage is discharged.
Preferably, the Electromagnetic Heating control circuit also includes：
Machine open/close module, for exporting starting-up signal/off signal in triggering；
The control module, it is additionally operable to, when receiving the off signal, control the IGBT to be stopped, same to time control
The switch discharge module is made to open.
Preferably, the surge detection module includes the first rectification unit and partial pressure unit, the first rectification unit bag
Include first input end and the two the second inputs, the first input end and the second input of first rectification unit respectively with institute
AC power connection is stated, the output end of first rectification unit is connected with the input of the partial pressure unit；The partial pressure list
The output end of member is the output end of the surge detection module.
Preferably, first rectification unit includes the first diode and the second diode, the sun of first diode
The first input end of extremely described first rectification unit, the negative electrode of the negative electrode of first diode and second diode and
The input connection of the partial pressure unit；The anode of second diode is the second input of first rectification unit.
Preferably, the partial pressure unit includes first resistor, second resistance, 3rd resistor, the 4th resistance and the first electric capacity,
The first end of the first resistor is the input of the partial pressure unit, and the second end of the first resistor is successively through described second
Resistance and 3rd resistor ground connection；The first end of 4th resistance and the second resistance and the 3rd resistor it is public
End connection, the second end of the 4th resistance are the output end of the partial pressure unit, and are connected with the first end of first electric capacity
Connect；The second end ground connection of first electric capacity.
Preferably, the switch discharge module includes driving switch, relay and the 5th resistance, and the relay includes line
Circle, stationary contact and movable contact, the controlled end of the driving switch are the controlled end of the switch discharge module, the driving switch
First end be connected with the first end of the coil, the second end of the driving switch is connected with the emitter stage of the IGBT, and
Ground connection；Second end of the coil is connected with the first dc source, and the movable contact is through the 5th resistance with the IGBT's
Colelctor electrode connects, the stationary contact ground connection.
Preferably, the switch discharge module also includes fly-wheel diode, the negative electrode of the fly-wheel diode with it is described straight
Power supply connection is flowed, the anode of the fly-wheel diode interconnects with the first end of the coil and the first end of the driving switch.
Preferably, the power supply module includes the second rectification unit, inductor, the second electric capacity, the 3rd electric capacity and the 6th electricity
Resistance, first end and the first input end of the AC power and second rectification unit of second electric capacity interconnect, described
Second end of the second electric capacity interconnects with the second input of the AC power and second rectification unit；Second rectification
First output end of unit is connected with the first end of the inductor, the second output head grounding of second rectification unit；Institute
The second end of inductor is stated to interconnect with the first end of the 3rd electric capacity and the parallel resonance module；The of 3rd electric capacity
Two ends are through the 6th resistance eutral grounding.
Preferably, the parallel resonance module includes the 4th electric capacity and coil panel, the first end of the 4th electric capacity and institute
State first end and the power supply module interconnection of coil panel, the second end of the 4th electric capacity and the second end of the coil panel and
The colelctor electrode interconnection of the IGBT.
The utility model also proposes a kind of electromagnetic heating apparatus, and the electromagnetic heating apparatus includes Electromagnetic Heating control as described above
Circuit processed, the Electromagnetic Heating control circuit include being used for the power supply mould by the AC conversion of AC power input is direct current
Block, the parallel resonance module being connected successively with the power supply module) and IGBT, and the control mould of the control IGBT work
Block, it is characterised in that the Electromagnetic Heating control circuit also includes surge detection module and switch discharge module, the surge inspection
The test side for surveying module is connected with the AC power, the output end of the surge detection module and the signal of the control module
Receiving terminal is connected, and the first control terminal of the control module is connected with the gate pole of the IGBT；Second control of the control module
End processed is connected with the controlled end of the switch discharge module, the input of the switch discharge module and the colelctor electrode of the IGBT
Connection；Wherein, the surge detection module, for detecting the voltage signal of the AC power, and corresponding surge inspection is exported
Survey signal；The control module, for when receiving the surge detection signal, controlling the IGBT to be stopped, simultaneously
Export discharge control signal；The switch discharge module, for being opened when receiving the discharge control signal, by described in
The electric energy of parallel resonance module storage is discharged.
The utility model Electromagnetic Heating control circuit is by setting surge detection module to be inputted to detect AC power in real time
To the voltage signal of power supply module, and by the ac voltage signal detected be converted into direct current voltage signal export to control mould
Block, so that control module receives surge detection module when detecting that surging signal occurs in the voltage signal of the AC power,
Stop output PPG pulse signals to turn off IGBT, and export discharge control signal, opened with driving switch discharge module, will
The electric energy of the parallel resonance module storage is discharged, and can thus be avoided due to the surge energy in electromagnetic heating apparatus
Too high, the problem of causing the energy on IGBT too high and breakdown, and then causing electromagnetic heating apparatus easy operational failure, occurs.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the high-level schematic functional block diagram that the utility model Electromagnetic Heating control circuit is applied in electromagnetic heating apparatus；
Fig. 2 is the electrical block diagram of the embodiment of Electromagnetic Heating control circuit one in Fig. 1.
Drawing reference numeral explanation：
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is relative between each part under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is only used for describing purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning
The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical scheme is conflicting or can not realize
The combination of case occurs without, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of Electromagnetic Heating control circuit, suitable for electromagnetic heating apparatus.
Reference picture 1, in the embodiment of the utility model one, the Electromagnetic Heating control circuit includes being used for AC power
The parallel resonance mould that the AC conversion of 100 inputs is the power supply module 10 of direct current, is connected successively with the power supply module 10
Block 20 and IGBT, and the control module 30 of the control IGBT work.
Wherein, control module 30 can be integrated chip, can also be made up of discrete component, the present embodiment is preferably integrated
Chip, to simplify circuit.Wherein, when needing heating, control module 30 controls IGBT works by exporting PPG pulse signals
Make, IGBT task driven parallel resonances module 20 converts electrical energy into magnetic energy, so that being heated steel body surface produces inductive loop
It is voluntarily generated heat at a high speed and realize heating.When that need not heat, control module 30 stops output PPG pulse signals, control
IGBT is stopped.
With continued reference to Fig. 1, in the present embodiment, in order to realize surge protection, the Electromagnetic Heating control circuit also includes wave
Detection module 40 and switch discharge module 50 are gushed, specifically, the test side of the surge detection module 40 and the AC power 100
Connection, the output end of surge detection module 40 are connected with the signal receiving end of control module 30, and the first of the control module 30
Control terminal is connected with the gate pole of the IGBT；Second control terminal of the control module 30 and the controlled end of switch discharge module 50
Connection, the input of switch discharge module 50 are connected with the colelctor electrode of the IGBT.
In the present embodiment, the test side of the surge detection module 40 is connected with the AC power 100, the surge detection
Module 40 is used for the voltage signal for detecting the AC power 100, and exports corresponding surge detection signal, surge detection module
40 detect AC power 100 in real time is inputted to the voltage signal of power supply module 10, and the ac voltage signal detected is changed
Voltage signal into direct current is exported to control module 30.Control module 30 controls institute when receiving the surge detection signal
IGBT is stated to be stopped.In the present embodiment, control module 30 turns off IGBT by stopping output PPG pulse signals, with control
IGBT is stopped, and now control module 30 also exports discharge control signal.Further, switch discharge module 50 is receiving
Open during the discharge control signal, and be electrically connected with the colelctor electrode of the IGBT, the parallel resonance module 20 is stored up
The electric energy deposited is discharged, so as to drag down the collector voltage of the IGBT, and then avoid IGBT collector voltage too high and
It is breakdown, damage electromagnetic heating apparatus the problem of.
The utility model Electromagnetic Heating control circuit detects AC power 100 in real time by setting surge detection module 40
Input to power supply module 10 voltage signal, and by the ac voltage signal detected be converted into direct current voltage signal export to
Control module 30, so that control module 30 receives the voltage signal that surge detection module 40 detects the AC power 100
When there is surging signal, stop output PPG pulse signals to turn off IGBT, and export discharge control signal, so as to driving switch
Discharge module 50 is opened, and the electric energy that the parallel resonance module 20 stores is discharged, is arranged such, is avoided due to electricity
Surge energy in magnetic firing equipment is too high, so as to cause the energy on IGBT too high and breakdown, and then causes Electromagnetic Heating
The problem of equipment easy operational failure, occurs.
Reference picture 1, in a preferred embodiment, the Electromagnetic Heating control circuit also include：
Machine open/close module (not shown), for exporting starting-up signal/off signal in triggering；
The control module 30, it is additionally operable to, when receiving the off signal, control the IGBT to be stopped, simultaneously
Control the switch discharge module to open, the electric energy that the parallel resonance module 20 stores is discharged.
It should be noted that resonant capacitance is typically provided with parallel resonance module 20, when control module 30 is receiving
During to the off signal, when controlling the IGBT to be stopped, due to the coil of parallel resonance module 20 being connected with IGBT
Disk and prime power supply module 10 also remain energy, and the rudimental energy will pair resonant capacitance being arranged in parallel with coil panel progress
Charging, when the energy remained is larger, the charging voltage of resonant capacitance will up to be led to more than 1.5KV, the charging voltage
Cause IGBT breakdown, so easily cause electromagnetic heating apparatus operational failure.
In order to avoid above mentioned problem occurs, in the present embodiment, the control module 30 is receiving the output of machine open/close module
Off signal when, control the IGBT to be stopped, while control the switch discharge module to open, the parallel connection is humorous
The electric energy that module of shaking 20 stores is discharged, and so as to avoid IGBT collector voltage too high and breakdown, and then causes electromagnetism
The problem of firing equipment easy operational failure, occurs.
Reference picture 2, in a preferred embodiment, the surge detection module 40 include the first rectification unit 41 and partial pressure list
Member 42, first rectification unit 41 includes first input end and the second input, and the first of first rectification unit 41 is defeated
Enter the positive pole test side and negative pole test side that end and the second input are respectively the surge detection module 40, first rectification
The output end of unit 41 is connected with the input of the partial pressure unit 42；The output end of the partial pressure unit 42 is examined for the surge
Survey the output end of module 40.
In the present embodiment, the ac voltage signal of AC power 100 is converted into by the first rectification unit 41 after over commutation
D. c. voltage signal, and export to partial pressure unit 42, partial pressure unit 42 and exported after carrying out voltage division processing to the d. c. voltage signal
To the signal receiving end of control module 30.
Reference picture 2, further, in above-described embodiment, first rectification unit 41 includes the first diode D1 and the
Two diode D2, the first diode D1 anode be first rectification unit 41 first input end, the described 1st
Pole pipe D1 negative electrode is connected with the negative electrode of the second diode D2 and the input of the partial pressure unit 42；Two or two pole
Pipe D2 anode is the second input of first rectification unit 41.
In the present embodiment, according to the one-way conduction of diode, the first diode D1 and the second diode D2 are by alternating current
The alternating voltage of source 100 and the output of negative electricity pressure side switchs to DC voltage.
Reference picture 2, further, in above-described embodiment, the partial pressure unit 42 includes first resistor R1, second resistance
R2,3rd resistor R3, the 4th resistance R4 and the first electric capacity C1, the first end of the first resistor R1 is the partial pressure unit 42
Input, the second end of the first resistor R1 are grounded through the second resistance R2 and 3rd resistor R3 successively；Described
Four resistance R4 first end is connected with the second resistance R2 and the 3rd resistor R3 common port, the 4th resistance R4's
Second end is the output end of the partial pressure unit 42, and is connected with the first end of the first electric capacity C1；The first electric capacity C1
The second end ground connection.
In the present embodiment, resistance R1, R2, R3 connect the detection signal of the DC voltage of input after partial pressure, through the 4th electricity
Resistance R4 is exported to control module 30.4th resistance R4 is current-limiting resistance, to avoid input too high to the electric current of control module 30
Burn the component in control module 30.First electric capacity C1 is used to filter out the alternating component in detection signal.
Reference picture 2, in a preferred embodiment, the switch discharge module 50 include driving switch 51, relay T1 and
5th resistance R5, the relay T1 include coil, stationary contact and movable contact, and the controlled end of the driving switch 51 is opened to be described
The controlled end of discharge module 50 is closed, the first end of the driving switch 51 is connected with the first end of the coil, and the driving is opened
Second end of pass 51 is connected with the emitter stage of the IGBT, and is grounded；Second end of the coil connects with the first dc source VCC
Connect, the movable contact is connected through the 5th resistance R5 with the colelctor electrode of the IGBT, the stationary contact ground connection.
In the present embodiment, control of the driving switch 51 based on control module 30, putting for the output of control module 30 is being received
Opened during electric control signal, and then electric adhesive on trigger relay T1, in this way, the energy on IGBT colelctor electrodes is through the 5th resistance R5
It is output to ground and discharges, can thus drags down the voltage of IGBT colelctor electrodes so as to avoid because of the energy on IGBT colelctor electrodes
It is too high and cause IGBT breakdown.
With continued reference to Fig. 2, in above-described embodiment, the driving switch 51 is preferably NPN type triode Q1, the NPN type
Triode Q1 base stage is the controlled end of the driving switch 51, and the extremely described driving of current collection of the NPN type triode Q1 is opened
Close 51 first end, the second end of the extremely described driving switch 51 of transmitting of the NPN type triode Q1.
In the present embodiment, NPN type triode Q1 base stage is when receiving the discharge control signal of the output of control module 30
Turn on, now NPN type triode Q1 colelctor electrode and the voltage very little at emitter stage both ends, equivalent to short circuit so that be attached thereto
Relay T1 coils one end ground connection, one termination direct current and upper electric adhesive.Certainly in other embodiments, driving switch 51 is gone back
It can be realized using other switching tubes such as metal-oxide-semiconductor, be not limited herein.
Based on above-described embodiment, the switch discharge module 50 still further comprises sustained diode 3, the afterflow two
Pole pipe D3 negative electrode is connected with the first dc source VCC, the anode of the sustained diode 3 and the first of the coil
The interconnection of the first end of end and the driving switch 51.
It should be noted that relay T1 coil after by electric current, can produce induced electromotive force at coil both ends, when
During current vanishes, its induced electromotive force can produce backward voltage to driving switch 51.In the present embodiment, sustained diode 3 is in parallel
At the both ends of coil, to discharge the energy stored in relay T1 coils when relay T1 disconnects, so as to avoid coil from producing
Raw induced electromotive force is too high and breakdown driven switchs 51.In the present embodiment, sustained diode 3 preferably uses fast quick-recovery two
Pole pipe or Schottky diode.
Reference picture 2, in a preferred embodiment, the power supply module 10 include the second rectification unit 11, inductor T1, the
Two electric capacity C2, the 3rd electric capacity C3 and the 6th resistance R6, the first end of the second electric capacity C2 and the AC power 100 and described
The first input end interconnection of second rectification unit 11, the second end of the second electric capacity C2 and the AC power 100 and described
The second input interconnection of second rectification unit 11；First output end of second rectification unit 11 is with the inductor T1's
First end connects, the second output head grounding of second rectification unit 11；The second end of the inductor T1 and the described 3rd
Electric capacity C3 first end and the parallel resonance module 20 interconnect；The second end of the 3rd electric capacity C3 is through the 6th resistance R6
Ground connection.
In the present embodiment, the second rectification unit 11 preferably uses bridge rectifier, and the second rectification unit 11 is by input
AC power 100 is converted into direct current electricity output after over commutation.Second electric capacity C2 is arranged in parallel in AC power 100 and negative electricity
Between pressure side, to reduce input to the voltage noise of power supply module 10, realize that the voltage stabilization of AC power 100 inputs.Inductance
The filter unit of device T1 and the 3rd electric capacity C3 compositions is used to filter out the alternating component in direct current, with the output of stable DC electricity.
It is understood that in order to avoid exception occurs in AC power 100 and causes input to the electric current of power supply module 10
Or overtension and burn the component in power supply module 10 and late-class circuit, in the present embodiment, reference picture 2, supplying
The input of electric module 10 is additionally provided with protective tube FU and piezo-resistance RZ, and protective tube FU is arranged at AC power 100 and supplied
Between the cathode voltage input of electric module 10, piezo-resistance RZ be arranged in parallel in power supply module 10 cathode voltage input and
Between cathode voltage input.
Reference picture 2, in a preferred embodiment, the parallel resonance module 20 include the 4th electric capacity C4 and coil panel L2,
The first end of the 4th electric capacity C4 interconnects with the first end and the power supply module 10 of the coil panel L2, the 4th electric capacity
C4 the second end interconnects with the second end of the coil panel L2 and the colelctor electrode of the IGBT.
In the present embodiment, the 4th electric capacity C4 is resonant capacitance, and parallel resonance module 20 is under IGBT driving by input
Direct current is converted into high-frequency high-voltage, and the high-frequency high-voltage of change, which flows through coil panel L2, at a high speed can produce the alternation magnetic of change at a high speed
, countless small vortex can be produced in metallic object when the magnetic line of force in magnetic field is by magnetic conductive metal container, makes metal material
Material voluntarily generates heat at a high speed in itself, and then the object in heating metal container.
In order to which thought of the present utility model is better described, below in conjunction with Fig. 1 and Fig. 2 to the specific of the utility model circuit
Principle is illustrated：
Such as accompanying drawing 1 and Fig. 2, electromagnetic heating apparatus works on power, and the second rectification unit 11 is electric by the AC power 100 of input
Output is to the filter unit being made up of inductor T1 and the 3rd electric capacity C3 after pressure is converted to direct current, and filter unit is by direct current
Alternating component filter out after output to resonance modules 20, when control module 30 receives heating instructions, output PP G pulse letters
Number to control IGBT to work, so as to drive parallel resonance module 20 that the direct current that power supply module 10 exports is converted into high-frequency and high-voltage
Electricity, the high-frequency high-voltage of change, which flows through coil panel L2, at a high speed can produce the alternating magnetic field of change at a high speed, when the magnetic line of force in magnetic field
By the way that countless small vortex can be produced during magnetic conductive metal container in metallic object, metal material is set voluntarily to generate heat at a high speed in itself,
And then the object in heating metal container.
During heating, the first diode D1 and the second diode D2 carry out the voltage of AC power 100 of input
DC voltage is converted into after rectification and is exported, resistance R1, R2, R3 connect the detection signal of the DC voltage of input after partial pressure,
Exported through the 4th resistance R4 to control module 30, control module 30 and receiving the detection signal, and in the electricity of AC power 100
When surging signal occurs in pressure signal, stop output PPG pulse signals to control IGBT to turn off, and export discharge control signal to drive
Dynamic switch 51 is to drive driving switch 51 to open, and then trigger relay T1 is closed, by the of the parallel resonance module 20
The electric energy stored on four electric capacity C4 is discharged, so as to drag down the collector voltage of the IGBT, can thus avoid due to
Surge energy in electromagnetic heating apparatus is too high, causes the energy on IGBT too high and breakdown, and then cause Electromagnetic Heating to set
The problem of standby easy operational failure, occurs.
At the end of heating, control module 30 stops output PPG pulse signals to control IGBT to be stopped, and then controls
Parallel resonance module 20 is stopped, while control module 30 exports discharge control signal to driving switch 51 to drive driving to open
Close 51 to open, and then trigger relay T1 is closed, and the energy of the residual in resonance modules is discharged, so as to avoid IGBT
When being stopped, because the energy on IGBT is too high and breakdown, and then cause asking for the easy operational failure of electromagnetic heating apparatus
Topic occurs.
The utility model Electromagnetic Heating control circuit is avoided due to when surge occurs in the AC power 100 of input, surge
Energy is too high and causes the energy on IGBT too high and breakdown, and the problem of causing electromagnetic heating apparatus easy operational failure occurs.
Also the energy of the residual in resonance modules 20 is discharged, so, avoided when electromagnetic heating apparatus stops heating simultaneously
IGBT is when being stopped, because the energy on IGBT colelctor electrodes is too high and breakdown, so as to protect electromagnetic heating apparatus.
The utility model also proposes a kind of electromagnetic heating apparatus, and the electromagnetic heating apparatus includes Electromagnetic Heating control circuit,
The concrete structure of the Electromagnetic Heating control circuit adds with reference to above-described embodiment because this electromagnetic heating apparatus employs above-mentioned electromagnetism
Whole technical schemes of all embodiments of thermal control circuit, therefore at least there is the skill of above-mentioned Electromagnetic Heating control circuit embodiment
All beneficial effects caused by art scheme, this is no longer going to repeat them.
Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model,
Every equivalent structure under utility model of the present utility model design, made using the utility model specification and accompanying drawing content
Conversion, or directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of Electromagnetic Heating control circuit, including the AC conversion for AC power (100) to be inputted are direct current
Power supply module (10), the parallel resonance module (20) being connected successively with the power supply module (10) and IGBT, and described in control
The control module (30) of IGBT work, it is characterised in that the Electromagnetic Heating control circuit also includes surge detection module (40)
And switch discharge module (50), the test side of the surge detection module (40) are connected with the AC power (100), the wave
The output end for gushing detection module (40) is connected with the signal receiving end of the control module (30), and the of the control module (30)
One control terminal is connected with the gate pole of the IGBT；Second control terminal of the control module (30) and the switch discharge module
(50) controlled end connection, the input of the switch discharge module (50) are connected with the colelctor electrode of the IGBT；Wherein,
The surge detection module (40), for detecting the voltage signal of the AC power (100), and exports corresponding surge
Detection signal；
The control module (30), for when receiving the surge detection signal, controlling the IGBT to be stopped, simultaneously
Export discharge control signal；
The switch discharge module (50), for being opened when receiving the discharge control signal, by the parallel resonance
The electric energy of module (20) storage is discharged.
2. Electromagnetic Heating control circuit as claimed in claim 1, it is characterised in that the Electromagnetic Heating control circuit is also wrapped
Include：
Machine open/close module, for exporting starting-up signal/off signal in triggering；
The control module (30), it is additionally operable to, when receiving the off signal, control the IGBT to be stopped, same to time control
The switch discharge module (50) is made to open.
3. Electromagnetic Heating control circuit as claimed in claim 1, it is characterised in that the surge detection module (40) includes the
One rectification unit (41) and partial pressure unit (42), first rectification unit (41) include first input end and the second input,
The first input end and the second input of first rectification unit (41) are connected with the AC power (100) respectively, described
The output end of first rectification unit (41) is connected with the input of the partial pressure unit (42)；The output of the partial pressure unit (42)
Hold as the output end of the surge detection module (40).
4. Electromagnetic Heating control circuit as claimed in claim 3, it is characterised in that first rectification unit (41) includes the
One diode (D1) and the second diode (D2), the anode of first diode (D1) is first rectification unit (41)
First input end, negative electrode and the partial pressure unit of the negative electrode of first diode (D1) with second diode (D2)
(42) input connection；The anode of second diode (D2) is the second input of first rectification unit (41).
5. Electromagnetic Heating control circuit as claimed in claim 3, it is characterised in that the partial pressure unit (42) includes the first electricity
Hinder (R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4) and the first electric capacity (C1), the first resistor (R1)
First end be the partial pressure unit input, the second end of the first resistor (R1) is successively through the second resistance (R2)
And 3rd resistor (R3) ground connection；The first end of 4th resistance (R4) and the second resistance (R2) and the 3rd electricity
The common port connection of (R3) is hindered, the second end of the 4th resistance (R4) is the output end of the partial pressure unit, and with described the
The first end connection of one electric capacity (C1)；The second end ground connection of first electric capacity (C1).
6. Electromagnetic Heating control circuit as claimed in claim 1, it is characterised in that the switch discharge module (50) includes driving
Dynamic switch (51), relay (T1) and the 5th resistance (R5), the relay (T1) include coil, stationary contact and movable contact, institute
State driving switch (51) controlled end be the switch discharge module (50) controlled end, the first end of the driving switch (51)
It is connected with the first end of the coil, the second end of the driving switch (51) is connected with the emitter stage of the IGBT, and is grounded；
Second end of the coil is connected with the first dc source, collection of the movable contact through the 5th resistance (R5) Yu the IGBT
Electrode connects, the stationary contact ground connection.
7. Electromagnetic Heating control circuit as claimed in claim 6, it is characterised in that the switch discharge module (50) also includes
Fly-wheel diode (D3), the negative electrode of the fly-wheel diode (D3) are connected with the dc source, the fly-wheel diode (D3)
The first end of anode and the coil and the first end of the driving switch (51) interconnect.
8. Electromagnetic Heating control circuit as claimed in claim 1, it is characterised in that it is whole that the power supply module (10) includes second
Flow unit (11), inductor (L1), the second electric capacity (C2), the 3rd electric capacity (C3) and the 6th resistance (R6), second electric capacity
(C2) first end interconnects with the first input end of the AC power (100) and second rectification unit (11), and described the
Second end of two electric capacity (C2) interconnects with the second input of the AC power (100) and second rectification unit (11)；
First output end of second rectification unit (11) is connected with the first end of the inductor (L1), second rectification unit
(11) the second output head grounding；Second end of the inductor (L1) and the first end of the 3rd electric capacity (C3) and it is described simultaneously
Join resonance modules (20) interconnection；Second end of the 3rd electric capacity (C3) is grounded through the 6th resistance (R6).
9. Electromagnetic Heating control circuit as claimed in claim 1, it is characterised in that the parallel resonance module (20) includes the
Four electric capacity (C4) and coil panel (L2), the first end of the 4th electric capacity (C4) and the first end of the coil panel (L2) and described
Power supply module (10) interconnects, the second end of the 4th electric capacity (C4) and the second end of the coil panel (L2) and the IGBT's
Colelctor electrode interconnects.
10. a kind of electromagnetic heating apparatus, it is characterised in that controlled including the Electromagnetic Heating as described in claim 1 to 9 any one
Circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720543383.6U CN207150872U (en) | 2017-05-12 | 2017-05-12 | Electromagnetic Heating control circuit and electromagnetic heating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720543383.6U CN207150872U (en) | 2017-05-12 | 2017-05-12 | Electromagnetic Heating control circuit and electromagnetic heating apparatus |
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| CN207150872U true CN207150872U (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882422A (en) * | 2017-05-12 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control circuit, method and electromagnetic heating apparatus |
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2017
- 2017-05-12 CN CN201720543383.6U patent/CN207150872U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882422A (en) * | 2017-05-12 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control circuit, method and electromagnetic heating apparatus |
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