CN105430783B - Electromagnetic oven circuit - Google Patents
Electromagnetic oven circuit Download PDFInfo
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- CN105430783B CN105430783B CN201510981530.3A CN201510981530A CN105430783B CN 105430783 B CN105430783 B CN 105430783B CN 201510981530 A CN201510981530 A CN 201510981530A CN 105430783 B CN105430783 B CN 105430783B
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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
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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
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/02—Induction heating
Abstract
The present invention relates to a kind of electromagnetic oven circuits, including：Rectification module, filter module, inverter module, IGBT drive module, control unit, synchronized sampling module, voltage sample module, current sampling module, furnace surface temperature sampling module and IGBT temperature sampling module.Above-mentioned electromagnetic oven circuit, the control unit of circuit core has high-performance reduced instruction set computer, it is designed exclusively for the product for needing A/D to convert, the control unit is applied with circuit of the invention, peripheral circuit uses rectification module, filter module, inverter module, IGBT drive module, synchronized sampling module, voltage sample module, current sampling module, furnace surface temperature sampling module and IGBT temperature sampling module.It compared to traditional electromagnetic oven circuit, eliminates and builds the trouble such as synchronous circuit, integrating circuit and power conditioning circuitry in peripheral circuit, simplify the structure of circuit, the reliability of product work is also improved, and is also beneficial to reduce production cost.
Description
Technical field
The present invention relates to electromagentic furnace technologies, more particularly to a kind of electromagnetic oven circuit.
Background technique
Currently, mainstream Household induction cooker application circuit, is usually used comparator+amplifier+MCU control mode, outside
It is more to enclose element, circuit is complicated.For the electromagnetic oven circuit of this quasi-tradition, the disadvantage is that：Synchronous circuit, integrating circuit and power tune
Economize on electricity road etc. is all made of outer member, and fault point is more, and production, maintenance difficulty are big, and overall cost is high.In the recent period, though there is part
MCU circuit functions such as integrated comparator, amplifier, but peripheral circuit or more complicated, stability is poor.
Summary of the invention
Based on this, the electromagnetic oven circuit that a kind of peripheral circuit is simple and stability is strong is provided.
A kind of electromagnetic oven circuit, including：The input terminal of rectification module, the rectification module is connect with AC power source, and being used for will
The exchange input of AC power source is converted to direct current input；Filter module, the input terminal of the filter module and the rectification module
Output end connection, for being filtered to the direct current input after conversion；Inverter module, the power input of the inverter module and institute
The output end connection for stating filter module, for magnetic field needed for generating electromagnetic oven work；IGBT drive module, the IGBT drive mould
The signal output end of block is connect with the signal input part of the inverter module, for driving the inverter module to work；Control is single
Member, the signal output port of the control unit are connect with the signal input part of the IGBT drive module, the control for circuit；
Synchronized sampling module is connected between the sampling end of the inverter module and the signal input port of described control unit, is used for
The job information of the inverter module is acquired to described control unit；Voltage sample module is connected to adopting for the rectification module
Between sample end and the signal input port of described control unit, for acquiring the supply voltage value of input and being sent to the control
Unit；Current sampling module is connected between the sampling end of the rectification module and the signal input port of described control unit,
For acquiring the current value after rectifying and being sent to described control unit；It is single to be connected to the control for furnace surface temperature sampling module
The signal input port of member, for acquiring the temperature value of the boiler face of electromagnetic oven and being sent to described control unit；IGBT temperature is adopted
Egf block is connected to the signal input port of described control unit, for acquiring the operating temperature of the IGBT drive module simultaneously
It is sent to described control unit.
Above-mentioned electromagnetic oven circuit, the control unit of circuit core have high-performance reduced instruction set computer, exclusively for need A/D turn
The product that changes and design, which is applied with circuit of the invention, peripheral circuit is using rectification module, filtering mould
Block, inverter module, IGBT drive module, synchronized sampling module, voltage sample module, current sampling module, furnace surface temperature sampling
Module and IGBT temperature sampling module.Compared to traditional electromagnetic oven circuit, eliminates and build synchronous circuit, product in peripheral circuit
The trouble such as parallel circuit and power conditioning circuitry, simplifies the structure of circuit, and the reliability of product work is also improved, also has
Conducive to reduction production cost.
Rectification module includes rectifier bridge BR1 in one of the embodiments, and the electrode input end of rectifier bridge BR1, which connects, to be handed over
The firewire in galvanic electricity source, the zero curve of the negative input connection AC power source of rectifier bridge BR1, the anode output of rectifier bridge BR1
The electrode input end of end connection filter module, the cathode output end ground connection of rectifier bridge BR1.
Filter module includes inductance coil L1 and capacitor C2 in one of the embodiments, one end of inductance coil L1 with
The output end of rectification module connects, and the input terminal of the other end and inverter module connects, one end of capacitor C2 and inverter module it is defeated
Enter end connection, other end ground connection.
Inverter module includes electromagnetic stove coil L2, capacitor C3, IGBT, resistance R17 and resistance in one of the embodiments,
R16；The output end of one end connection filter module of electromagnetic stove coil L2, the other end connect the collector C of IGBT；Capacitor C3 is in parallel
At the both ends of electromagnetic stove coil L2；Resistance R16 is connected between the gate pole G of IGBT and the output end of IGBT drive module；IGBT
Emitter E ground connection, one end of resistance R17 and the gate pole G connection of IGBT, the other end is grounded.
IGBT drive module includes resistance R3, electrolytic capacitor C21, resistance R14, resistance in one of the embodiments,
R15, NPN type triode Q1, NPN type triode Q2, PNP type triode Q3, resistance Rx, capacitor Cx and diode D7；Resistance
The one end R13 connects power supply, and the other end is connect with the anode of electrolytic capacitor C21, the cathode ground connection of electrolytic capacitor C21；Resistance R14
It is connected between the anode of electrolytic capacitor C21 and the base stage of NPN type triode Q1；The base stage of NPN type triode Q1 and control are single
The signal output end connection of member, the emitter ground connection of NPN type triode Q1, the collector of NPN type triode Q1 pass through electricity
Resistance R15 is connect with the anode of electrolytic capacitor C21；The collector of NPN type triode Q2 is connect with the anode of electrolytic capacitor C21, should
The base stage of NPN type triode Q2 is connect with the base stage of the collector of NPN type triode Q1 and PNP type triode Q3 respectively, the NPN
The emitter of type triode Q2 is connect by resistance Rx with the emitter of PNP type triode Q3, the collector of PNP type triode Q3
Ground connection, the base stage of PNP type triode Q3 are grounded by capacitor Cx；Diode D7 anode respectively with the input terminal of inverter module
And the emitter connection of PNP type triode Q3, the cathode of diode D7 are connect with the collector of NPN type triode Q2.
Synchronized sampling module includes resistance R7, resistance R9, resistance R10, resistance R11, resistance in one of the embodiments,
R12, capacitor C20 and capacitor C19；One end of resistance R7 is connect with inverter module, and the other end is connect with resistance R9, resistance R9's
Other end ground connection；Resistance R10 is connect with inverter module, and the other end is connect with resistance R11, and one end of resistance R11 and resistance R12 connect
It connects, the other end ground connection of resistance R12；One end of C19 is connected to the connecting pin of resistance R7 Yu resistance R9, and the other end is connected to resistance
The connecting pin of R11 and resistance R12；One end of capacitor C20 is connected to the connecting pin of resistance R19 Yu capacitor C19, other end ground connection；
The both ends of capacitor C19 are connect with the signal port of control unit respectively.
Voltage sample module includes diode D1, diode D2, capacitor C4, resistance R2, electricity in one of the embodiments,
Resistance R3, resistance R4, capacitor C5 and diode D10, diode D2, resistance R2 and resistance R4 are sequentially connected in series；Diode D2's
The firewire of AC power source is connect, the anode of diode D2 is connect with resistance R2；Resistance R4 is grounded far from one end of resistance R3；Diode
D1 is connected between the zero curve of AC power source and the cathode of diode D2；Capacitor C4 is connected in parallel on the both ends of resistance R2；Capacitor C5 is simultaneously
It is associated between resistance R4；The cathode of diode D10 connects to power supply, and the anode of diode D10 is connected to resistance R3 and resistance R4
Between, and connect with the signal input port of control unit.
Furnace surface temperature sampling module includes boiler face sensor POT, resistance R23 and capacitor in one of the embodiments,
One end of C16, boiler face sensor POT connect to power supply, and the other end is defeated with the signal of one end of resistance R23 and control unit respectively
Enter end connection, the other end ground connection of resistance R23；Capacitor C16 is parallel to the both ends of resistance R23.
IGBT temperature sampling module includes resistance R22, IGBT temperature sensor and capacitor in one of the embodiments,
C15；A termination power of resistance R22, the other end are defeated with the signal of the anode of IGBT temperature sensor and control unit respectively
Enter end connection, the cathode ground connection of IGBT temperature sensor；Capacitor C15 is parallel to the both ends of IGBT temperature sensor.
Electromagnetic oven circuit further includes radiating module in one of the embodiments, and radiating module includes fan FAN, two poles
Pipe D9, NPN type triode Q4, resistance R24, electrolytic capacitor C18 and buzzer；The anode of fan FAN connects to power supply, fan
The cathode of FAN is connect with the collector of NPN triode Q4；Diode D9 is parallel between the positive electrode and negative electrode of fan FAN；NPN
The emitter of triode Q4 is grounded, and the collector of NPN triode Q4 is connect with resistance R24；The other end of resistance R24 and control are single
The signal output end connection of member；The cathode of electrolytic capacitor C18 and the signal output end of control unit connect, electrolytic capacitor C18's
Anode is connect with the cathode of buzzer, the anode connection power supply of buzzer.
Detailed description of the invention
Fig. 1 is the functional block diagram of electromagnetic oven circuit of the invention；
Fig. 2 is the circuit diagram of electromagnetic oven circuit shown in FIG. 1.
Specific embodiment
To further understand the features of the present invention, technological means and specific purposes achieved, function, parse this hair
Bright advantage and spirit, by being further understood below in conjunction with attached drawing and specific embodiment to detailed description of the invention.
Referring to Fig. 1 to Fig. 2, which show the embodiments of electromagnetic oven circuit of the invention.
As shown in Figure 1, its functional block diagram for the electromagnetic oven circuit of the present embodiment.
A kind of electromagnetic oven circuit, including：
The input terminal of rectification module, the rectification module is connect with AC power source, for turning the exchange input of AC power source
It is changed to direct current input；
Filter module, the input terminal of the filter module is connect with the output end of the rectification module, after to conversion
Direct current input is filtered；
Inverter module, the power input of the inverter module is connect with the output end of the filter module, for generating electricity
Magnetic furnaceman makees required magnetic field；
The signal input part of IGBT drive module, the signal output end of the IGBT drive module and the inverter module connects
It connects, for driving the inverter module to work；
Control unit, the signal output port of the control unit are connect with the signal input part of the IGBT drive module,
Control for circuit；
Synchronized sampling module, be connected to the inverter module sampling end and described control unit signal input port it
Between, for acquiring the job information of the inverter module to described control unit；
Voltage sample module, be connected to the rectification module sampling end and described control unit signal input port it
Between, for acquiring the supply voltage value of input and being sent to described control unit；
Current sampling module, be connected to the rectification module sampling end and described control unit signal input port it
Between, for acquiring the current value after rectifying and being sent to described control unit；
Furnace surface temperature sampling module is connected to the signal input port of described control unit, for acquiring the furnace of electromagnetic oven
The temperature value in face is simultaneously sent to described control unit；
IGBT temperature sampling module is connected to the signal input port of described control unit, drives for acquiring the IGBT
The operating temperature of dynamic model block is simultaneously sent to described control unit.
In addition, above-mentioned electromagnetic oven circuit further includes radiating module and communication module.The radiating module is connected to the control
The signal input port of unit processed, for equipment cooling and by the control of described control unit.And communication module is connected to institute
The signal transmission port for stating control unit is exchanged for other module datas with electromagnetic oven, such as keyboard input module or display
Module etc..
Hereinafter, being the circuit diagram of the electromagnetic oven circuit of the present embodiment incorporated by reference to Fig. 2.
AC power source selects 220v AC power source, and meets fuse FUSE in the input of the firewire of the 220v AC power source,
Meanwhile capacitor C1 and resistance RV1 are parallel between firewire and zero curve.Wherein capacitor C1 is X capacitor, for inhibiting power grid dry
In advance；Resistance RV1 is varistor.
Rectification module, including rectifier bridge BR1, the firewire of the electrode input end connection AC power source of rectifier bridge BR1, the rectification
The zero curve of the negative input connection AC power source of bridge BR1, the anode of the cathode output end connection filter module of rectifier bridge BR1
Input terminal, the cathode output end ground connection of rectifier bridge BR1.
Filter module, including one end of inductance coil L1 and capacitor C2, inductance coil L1 and the output end of rectification module connect
It connects, the input terminal connection of the other end and inverter module, one end of capacitor C2 and the input terminal of inverter module connect, another termination
Ground.
Inverter module, including electromagnetic stove coil L2, capacitor C3, IGBT, resistance R17 and resistance R16；Electromagnetic stove coil L2's
One end connects the output end of filter module, and the other end connects the collector C of IGBT；Capacitor C3 is connected in parallel on the two of electromagnetic stove coil L2
End；Resistance R16 is connected between the gate pole G of IGBT and the output end of IGBT drive module；The emitter E of IGBT is grounded, resistance
One end of R17 and the gate pole G connection of IGBT, other end ground connection.Element in above-mentioned inverter module constitutes parallel resonance topology
Circuit.Wherein, resistance R16 is the current-limiting resistance of IGBT, and resistance R17 is pull down resistor, plays the role of stable level.
IGBT drive module, including resistance R3, electrolytic capacitor C21, resistance R14, resistance R15, NPN type triode Q1, NPN
Type triode Q2, PNP type triode Q3, resistance Rx, capacitor Cx and diode D7；The one end resistance R13 connects power supply, the other end
It is connect with the anode of electrolytic capacitor C21, the cathode ground connection of electrolytic capacitor C21；Resistance R14 is being connected to electrolytic capacitor C21 just
Between pole and the base stage of NPN type triode Q1；The base stage of NPN type triode Q1 and the signal output end of control unit connect, should
The emitter of NPN type triode Q1 is grounded, and the collector of NPN type triode Q1 is passing through resistance R15 and electrolytic capacitor C21 just
Pole connection；The collector of NPN type triode Q2 is connect with the anode of electrolytic capacitor C21, the base stage difference of NPN type triode Q2
It is connect with the base stage of the collector of NPN type triode Q1 and PNP type triode Q3, the emitter of NPN type triode Q2 passes through
Resistance Rx is connect with the emitter of PNP type triode Q3, the grounded collector of PNP type triode Q3, PNP type triode Q3's
Base stage is grounded by capacitor Cx；The positive transmitting with the input terminal of inverter module and PNP type triode Q3 respectively of diode D7
Pole connection, the cathode of diode D7 are connect with the collector of NPN type triode Q2.When control unit exports high level, NPN type
Triode Q1 conducting, NPN type triode Q2, PNP type triode Q3 base stage be low level, NPN type triode Q2 cut-off, PNP
Type triode Q3 conducting, IGBT cut-off.When control unit exports low level, NPN type triode Q1 cut-off, NPN type triode
Q2, PNP type triode Q3 base stage be high level, NPN type triode Q2 conducting, PNP type triode Q3 cut-off, IGBT conducting.
Diode D7 plays the role of clamping in circuit；Resistance RX is current-limiting resistance, plays smooth (output square wave) rising edge
Effect.Capacitor Cx is for inhibiting interference.
Control unit, shown in Fig. 2 it is used in the examples be 20 needle pins 8-bit microcontroller MCU, model
HT45F12S4.It is designed with high-performance reduced instruction set computer exclusively for the product for needing A/D to convert, such as sensor signal
Input.Such single-chip microcontroller have optional low-power consumption, I/O using flexible, timer function, type of oscillation, multichannel A/D conversion,
It the features such as pause and arousal function, can be widely applied in A/D product, such as sensor signal processing etc..In addition, controlling
Capacitor C14 is connected between the VSS foot and VDD foot of unit, and VSS foot is grounded, VDD foot connects power supply.
Synchronized sampling module, including resistance R7, resistance R9, resistance R10, resistance R11, resistance R12, capacitor C20 and electricity
Hold C19；One end of resistance R7 is connect with inverter module, and the other end is connect with resistance R9, the other end ground connection of resistance R9；Resistance
R10 is connect with inverter module, and the other end is connect with resistance R11, and resistance R11 is connect with one end of resistance R12, and resistance R12's is another
One end ground connection；One end of C19 is connected to the connecting pin of resistance R7 Yu resistance R9, and the other end is connected to resistance R11's and resistance R12
Connecting pin；One end of capacitor C20 is connected to the connecting pin of resistance R19 Yu capacitor C19, other end ground connection；The both ends of capacitor C19 point
It is not connect with the signal port of control unit.The circuit of above-mentioned synchronized sampling module is connected to the both ends of electromagnetic stove coil L2 respectively,
Partial pressure is followed by two in control unit, three feet, and capacitor C19 and capacitor C20 are high-frequency filter capacitor.
Voltage sample module, including diode D1, diode D2, capacitor C4, resistance R2, resistance R3, resistance R4, capacitor C5
And diode D10, diode D2, resistance R2, resistance R3 and resistance R4 are sequentially connected in series；Diode D2's connects AC power source
Firewire, diode D2 anode connect with resistance R2；Resistance R4 is grounded far from one end of resistance R3；Diode D1 is connected to friendship
Between the zero curve in galvanic electricity source and the cathode of diode D2；Capacitor C4 is connected in parallel on the both ends of resistance R2；Capacitor C5 is connected in parallel on resistance R4
Between；The cathode of diode D10 connects to power supply, and the anode of diode D10 is connected between resistance R3 and resistance R4, and with control
The signal input port of unit processed connects.Diode D1, diode D2 are full-wave rectifying circuit, and the alternating voltage of power grid is converted
For the DC voltage of pulsation.Resistance R2, resistance R3, resistance R4 are divider resistance, and capacitor C4 is speed-up capacitor, and capacitor C5 is high frequency
Filter capacitor.Diode D10 is clamp diode.There are two effects (to be made by the 4th foot of control chip for this voltage sample module
For AD input, chip interior is connected with comparator)：One is normal power grid exchange AD voltage sample, and capacitor C4 does not work,
This voltage is used to play the foundation as permanent function calculating with electric current AD.When there is surge interference as external power grid in another, electricity
Hold C4 conducting, be equivalent to and be shorted resistance R2, control the 4th foot voltage of chip increases, and internal comparator movement generates interrupt signal.
Chip shutdown PPG output is controlled, so that switch-off power, plays the purpose of protection IGBT.Since the time of surge is very short, in addition in
Portion's program is to use digital filtering algorithm, therefore do not influence in the short time on the sampling precision of the end AD product.
Current sampling module, including resistance RT0, resistance R18, capacitor C17, resistance R19 and capacitor C30；The one of resistance RT0
End connects the cathode output end of the rectification module, other end ground connection；One end of resistance R18 is connected to rectification module and resistance
The connecting pin of RT0, the other end are connect with one end of capacitor C17.The both ends of capacitor C17 connect the signal input part of control unit respectively
Mouthful.Resistance R19 is connected in parallel on the both ends of capacitor C17.One end of capacitor C30 is connected to the connecting pin of resistance R18 Yu capacitor C17, separately
One end ground connection.Current sampling module is by resistance RT0, resistance R18, resistance R19, capacitor C17, capacitor C30 and is connected to control list
15,16 feet of member.16 feet connect the input terminal of control chip interior amplifier, and 15 feet connect the defeated of control chip interior amplifier
Outlet.Resistance RT0 is that divider resistance can generate the voltage of very little at resistance both ends, through electricity when there is current flowing resistance RT0
R18 is hindered to 16 feet of control unit, and resistance R19 is negative feedback resistor, and capacitor C17 is speed-up capacitor, for adjusting amplifier
Amplification factor.Capacitor C30 is played a filtering role.
Furnace surface temperature sampling module, including boiler face sensor POT, resistance R23 and capacitor C16, boiler face sensor POT's
One end connects to power supply, and the other end is connect with the signal input part of one end of resistance R23 and control unit respectively, resistance R23's
Other end ground connection；Capacitor C16 is parallel to the both ends of resistance R23.
IGBT temperature sampling module, including resistance R22, IGBT temperature sensor and capacitor C15；One end of resistance R22
Power supply is connect, the other end is connect with the signal input part of the anode of IGBT temperature sensor and control unit respectively, IGBT temperature
The cathode of sensor is grounded；Capacitor C15 is parallel to the both ends of IGBT temperature sensor.IGBT temperature sensor is detected for AD.
Radiating module, radiating module include fan FAN, diode D9, NPN type triode Q4, resistance R24, electrolytic capacitor
C18 and buzzer；The anode of fan FAN connects to power supply, and the cathode of fan FAN is connect with the collector of NPN triode Q4；
Diode D9 is parallel between the positive electrode and negative electrode of fan FAN；The emitter of NPN triode Q4 is grounded, the collection of NPN triode Q4
Electrode is connect with resistance R24；The other end of resistance R24 and the signal output end of control unit connect；The cathode of electrolytic capacitor C18
It is connect with the signal output end of control unit, the anode of electrolytic capacitor C18 is connect with the cathode of buzzer, and the anode of buzzer is even
Connect power supply.The circuit of above-mentioned radiating module is that fan FAN and buzzer circuit share one I/O mouthfuls, and fan FAN is opened when high level
Dynamic, fan FAN stops when low level, and electrolytic capacitor C18 is coupled capacitor, the I/O mouthful square waves for exporting 4KHz when buzzer works
Through electrolytic capacitor C18 to buzzer.
Communication module, including the interface CN1 that three data switching ports with control unit are connect, meanwhile, CN1 is wrapped altogether
Containing five pins, remaining two pins connect power supply and ground connection respectively.
Above-mentioned electromagnetic oven circuit, the control unit of circuit core have high-performance reduced instruction set computer, exclusively for need A/D turn
The product that changes and design, which is applied with circuit of the invention, peripheral circuit is using rectification module, filtering mould
Block, inverter module, IGBT drive module, synchronized sampling module, voltage sample module, current sampling module, furnace surface temperature sampling
Module and IGBT temperature sampling module.Compared to traditional electromagnetic oven circuit, eliminates and build synchronous circuit, product in peripheral circuit
The trouble such as parallel circuit and power conditioning circuitry, simplifies the structure of circuit, and the reliability of product work is also improved, also has
Conducive to reduction production cost.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of electromagnetic oven circuit, which is characterized in that including：
The input terminal of rectification module, the rectification module is connect with AC power source, for being converted to the exchange input of AC power source
Direct current input；
Filter module, the input terminal of the filter module are connect with the output end of the rectification module, for the direct current after conversion
Input is filtered；
Inverter module, the power input of the inverter module is connect with the output end of the filter module, for generating electromagnetic oven
Magnetic field needed for work；
IGBT drive module, the signal output end of the IGBT drive module are connect with the signal input part of the inverter module, are used
In the driving inverter module work；The IGBT drive module includes resistance R13, electrolytic capacitor C21, resistance R14, resistance
R15, NPN type triode Q1, NPN type triode Q2, PNP type triode Q3, resistance Rx, capacitor Cx and diode D7；It is described
The one end resistance R13 connects power supply, and the other end is connect with the anode of the electrolytic capacitor C21, and the cathode of electrolytic capacitor C21 connects
Ground；The resistance R14 is connected to the positive between the base stage of the NPN type triode Q1 of the electrolytic capacitor C21；The NPN
The emitter of type triode Q1 is grounded, and the collector of NPN type triode Q1 passes through the resistance R15 and the electrolytic capacitor
The anode connection of C21；The collector of the NPN type triode Q2 is connect with the anode of the electrolytic capacitor C21, the NPN type three
The base stage of pole pipe Q2 is connect with the base stage of the collector of the NPN type triode Q1 and the PNP type triode Q3 respectively, should
The emitter of NPN type triode Q2 is connect by resistance Rx with the emitter of the PNP type triode Q3, three pole of positive-negative-positive
The base stage of the grounded collector of pipe Q3, PNP type triode Q3 is grounded by capacitor Cx；The diode D7 anode respectively with
The emitter of the signal input part of the inverter module and the PNP type triode Q3 connection, the cathode of the diode D7 with
The collector of the NPN type triode Q2 connects；
Control unit, the signal output port of the control unit connect with the signal input part of the IGBT drive module, are used for
The control of circuit；The base stage of the NPN type triode Q1 and the signal output end of described control unit connect；
Synchronized sampling module is connected between the sampling end of the inverter module and the signal input port of described control unit,
For acquiring the job information of the inverter module to described control unit；The synchronized sampling module includes resistance R7, resistance
R9, resistance R10, resistance R11, resistance R12, capacitor C20 and capacitor C19；One end of the resistance R7 and the inverter module
Connection, the other end are connect with the resistance R9, the other end ground connection of the resistance R9；The resistance R10 and the inverter module
Connection, the other end are connect with the resistance R11, and the resistance R11 is connect with one end of the resistance R12, the resistance R12's
Other end ground connection；One end of the capacitor C19 is connected to the connecting pin of the resistance R7 Yu the resistance R9, and the other end is connected to
The connecting pin of the resistance R11 and the resistance R12；One end of the capacitor C20 is connected to the resistance R19 and the capacitor
The connecting pin of C19, other end ground connection；The both ends of the capacitor C19 are connect with the signal port of described control unit respectively；
Voltage sample module is connected between the sampling end of the rectification module and the signal input port of described control unit,
For acquiring the supply voltage value of input and being sent to described control unit；
Current sampling module is connected between the sampling end of the rectification module and the signal input port of described control unit,
For acquiring the current value after rectifying and being sent to described control unit；
Furnace surface temperature sampling module is connected to the signal input port of described control unit, for acquiring the boiler face of electromagnetic oven
Temperature value is simultaneously sent to described control unit；
IGBT temperature sampling module is connected to the signal input port of described control unit, for acquiring the IGBT driving mould
The operating temperature of block is simultaneously sent to described control unit.
2. electromagnetic oven circuit according to claim 1, which is characterized in that the rectification module includes rectifier bridge BR1, described
The firewire of the electrode input end connection AC power source of rectifier bridge BR1, the negative input connection AC power source of rectifier bridge BR1
Zero curve, the cathode output end of rectifier bridge BR1 connect the electrode input end of the filter module, and the cathode of rectifier bridge BR1 is defeated
Outlet ground connection.
3. electromagnetic oven circuit according to claim 1, which is characterized in that the filter module includes inductance coil L1 and electricity
Hold C2, one end of the inductance coil L1 is connect with the output end of the rectification module, the input terminal of the other end and inverter module
Connection, one end of the capacitor C2 are connect with the input terminal of the inverter module, other end ground connection.
4. electromagnetic oven circuit according to claim 1, which is characterized in that the inverter module include electromagnetic stove coil L2,
Capacitor C3, IGBT, resistance R17 and resistance R16；One end of the electromagnetic stove coil L2 connects the output end of the filter module,
The other end connects the collector C of the IGBT；The capacitor C3 is connected in parallel on the both ends of the electromagnetic stove coil L2；The resistance
R16 is connected between the gate pole G of the IGBT and the output end of the IGBT drive module；The emitter E of the IGBT is grounded,
One end of the resistance R17 is connect with the gate pole G of the IGBT, other end ground connection.
5. electromagnetic oven circuit according to claim 1, which is characterized in that the voltage sample module include diode D1,
Diode D2, capacitor C4, resistance R2, resistance R3, resistance R4, capacitor C5 and diode D10, the diode D2, the electricity
Resistance R2, the R3 and the resistance R4 are sequentially connected in series；The anode of the diode D2 connects the firewire of AC power source, two pole
The cathode of pipe D2 is connect with the resistance R2；The resistance R4 is grounded far from one end of the resistance R3；The diode D1 connects
It is connected between the zero curve of AC power source and the cathode of the diode D2；The capacitor C4 is connected in parallel on the both ends of the resistance R2；
The capacitor C5 is connected in parallel between the resistance R4；The cathode of the diode D10 connects to power supply, the diode D10's
Anode is connected between the resistance R3 and the resistance R4, and connect with the signal input port of described control unit.
6. electromagnetic oven circuit according to claim 1, which is characterized in that the furnace surface temperature sampling module includes that boiler face passes
Sensor POT, resistance R23 and capacitor C16, one end of the boiler face sensor POT connect to power supply, the other end respectively with it is described
One end of resistance R23 and the signal input part connection of described control unit, the other end ground connection of the resistance R23；The capacitor
C16 is parallel to the both ends of the resistance R23.
7. electromagnetic oven circuit according to claim 1, which is characterized in that the IGBT temperature sampling module includes resistance
R22, IGBT temperature sensor and capacitor C15；A termination power of the resistance R22, the other end respectively with the IGBT temperature
Spend the anode of sensor and the signal input part connection of described control unit, the cathode ground connection of the IGBT temperature sensor；
The capacitor C15 is parallel to the both ends of the IGBT temperature sensor.
8. electromagnetic oven circuit according to claim 1, which is characterized in that the electromagnetic oven circuit further includes radiating module,
The radiating module includes fan FAN, diode D9, NPN type triode Q4, resistance R24, electrolytic capacitor C18 and buzzer；
The anode of the fan FAN connects to power supply, and the cathode of the fan FAN is connect with the collector of NPN triode Q4；Described two
Pole pipe D9 is parallel between the positive electrode and negative electrode of the fan FAN；The emitter of the NPN triode Q4 is grounded, the NPN tri-
The collector of pole pipe Q4 is connect with resistance R24；The other end of the resistance R24 and the signal output end of described control unit connect
It connects；The cathode of the electrolytic capacitor C18 and the signal output end of described control unit connect, the anode of the electrolytic capacitor C18
It is connect with the cathode of the buzzer, the anode connection power supply of the buzzer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105662117A (en) * | 2016-04-13 | 2016-06-15 | 浙江大学 | Boiling-free energy-saving hot pot device and boiling-free control method thereof |
| CN108811214A (en) * | 2017-05-04 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Power supply anomaly protection method, device and electromagnetic heating system |
| CN107949090B (en) * | 2017-09-11 | 2018-10-09 | 中山市科卓尔电器有限公司 | A kind of frequency hopping power driving circuit and method |
| CN107734729B (en) * | 2017-10-18 | 2024-01-30 | 广东格兰仕集团有限公司 | Circuit with double IH heating functions |
| CN110118369A (en) * | 2018-02-05 | 2019-08-13 | 乐金电子研发中心(上海)有限公司 | Electromagnetism burner and electromagnetic oven |
| CN110801160B (en) * | 2018-08-06 | 2021-06-18 | 佛山市顺德区美的电热电器制造有限公司 | Control method and system of cooking device and cooking device |
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