CN205544904U - Electromagnetic heating device and drive circuit of power switch pipe thereof - Google Patents
Electromagnetic heating device and drive circuit of power switch pipe thereof Download PDFInfo
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- CN205544904U CN205544904U CN201620104592.6U CN201620104592U CN205544904U CN 205544904 U CN205544904 U CN 205544904U CN 201620104592 U CN201620104592 U CN 201620104592U CN 205544904 U CN205544904 U CN 205544904U
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Abstract
The utility model discloses an electromagnetic heating device and drive circuit of power switch pipe thereof, drive circuit includes: with the continuous drive unit of drive end of power switch pipe, drive unit outlet driving signal manages to the power switch and switches on or turn -off with the drive power switch tube, transformation unit, it links to each other with drive unit in order to adjust the driving voltage that drive signal corresponds, control chip, control chip pass through a first control output control signal to drive unit and through the 2nd control signal of second control output to transformation unit so that the power switch plumber do at enlarged state to through a first control output control signal to drive unit and through the 3rd control signal of second control output to transformation unit so that the power switch plumber do at the saturated conduction state. From this, temporal pulse current is opened to the power switch pipe in the time of can reducing the electromagnetic heating device start -up to avoid burning out the power switch pipe, and reduce the start -up noise.
Description
Technical field
This utility model relates to an electro-technical field, particularly to the drive circuit of power switch pipe in a kind of electromagnetic heater and a kind of electromagnetic heater.
Background technology
Electromagnetic heater in correlation technique generally controls power switch pipe and turns in saturation conduction state.But, correlation technique has the drawback that, due to the existence of filter capacitor in power supply circuits, DC voltage after power supply circuits rectifying and wave-filtering is by for 1.4 times of alternating voltage, so, use the conducting of saturation conduction state during startup, it will the momentary pulse electric current making power switch pipe is excessive, even more than it uses limit value, easily makes power switch pipe burn and causes excessive startup noise.
Therefore, correlation technique needs to improve.
Utility model content
One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.To this end, a purpose of the present utility model is to propose a kind of power switch tube drives circuit, when this circuit can reduce startup, power switch pipe opens the pulse current of moment.
Another purpose of the present utility model is to propose a kind of electromagnetic heater.
For reaching above-mentioned purpose, the utility model proposes the drive circuit of power switch pipe in a kind of electromagnetic heater, in described electromagnetic heater, the drive circuit of power switch pipe includes: driver element, described driver element is connected with the drive end of described power switch pipe, and described driver element output drive signal to described power switch pipe is to drive described power switch pipe on or off；Voltage transformation unit, described voltage transformation unit to adjust described driving signal corresponding driving voltage connected with described driver element；Control chip, described control chip has the first control output end and the second control output end, described first control output end is connected with described driver element, described second control output end is connected with described voltage transformation unit, described control chip controls signal to described driver element by described first control output end output first and controls signal to described voltage transformation unit so that described power switch pipe is operated in magnifying state by described second control output end output second, and control signal to described driver element by described first control output end output described first and exported by described second control output end and the 3rd control signal to described voltage transformation unit so that described power switch pipe is operated in saturation conduction state.
According to the drive circuit of power switch pipe in the electromagnetic heater that the utility model proposes, control chip controls signal to driver element by the first control output end output first and controls signal to voltage transformation unit by the second control output end output second so that power switch pipe is operated in magnifying state, and controls signal to driver element by the first control output end output first and control signal to voltage transformation unit so that power switch pipe is operated in saturation conduction state by the second control output end output the 3rd.Thus, in electromagnetic heater, the drive circuit of power switch pipe is by adjusting the duty of power switch pipe, can reduce power switch pipe when electromagnetic heater starts and open the pulse current of moment, thus avoid burning power switch pipe, and reduce startup noise, promote the experience of user.
Specifically, described voltage transformation unit includes: the first resistance, and one end of described first resistance is connected with described second control output end；Photoelectrical coupler, it is connected that the first pin of described photoelectrical coupler and first presets power supply, and the second pin of described photoelectrical coupler is connected with the other end of described first resistance；First stabilivolt, the negative electrode of described first stabilivolt is connected with the three-prong of described photoelectrical coupler, and the anode of described first stabilivolt is connected with the 4th pin of described photoelectrical coupler, and described first stabilivolt is connected in described driver element.
Specifically, described driver element includes: the second resistance, and one end of described second resistance is connected with described first control output end；3rd resistance, one end of described 3rd resistance is connected with one end of described second resistance and described first control output end respectively, the other end ground connection of described 3rd resistance；First audion, the base stage of described first audion is connected with the other end of described second resistance, the grounded emitter of described first audion, and the colelctor electrode of described first audion is preset power supply by the 4th resistance and second and is connected；Second audion, the base stage of described second audion is connected with the colelctor electrode of described first audion, the grounded emitter of described second audion, and the colelctor electrode of described second audion is preset power supply by the 5th resistance with described second and is connected；3rd audion, the base stage of described 3rd audion is connected with the colelctor electrode of described second audion, and the colelctor electrode of described 3rd audion is connected with the anode of described first stabilivolt；6th resistance, one end of described 6th resistance is connected with the negative electrode of described first stabilivolt, and the other end of described 6th resistance is preset power supply with described second and is connected；4th audion, the base stage of described 4th audion is connected with the base stage of described 3rd audion, the grounded collector of described 4th audion；7th resistance, one end of described 7th resistance is connected with the emitter stage of described 4th audion, and the other end of described 7th resistance is connected with the emitter stage of described 3rd audion；8th resistance, one end of described 8th resistance is connected with the emitter stage of described 3rd audion and the other end of described 7th resistance respectively, and the described other end of the 8th resistance is connected with the drive end of described power switch pipe.
Wherein, described first audion, described second audion, described 3rd audion are NPN type triode, and described 4th audion is described PNP type triode.
Further, in described electromagnetic heater, the drive circuit of power switch pipe also includes: the second stabilivolt, the anode of described second stabilivolt be connected with the emitter stage of described power switch pipe after ground connection, the negative electrode of described second stabilivolt is connected with the drive end of described power switch pipe；9th resistance, described 9th resistance is in parallel with described second stabilivolt.
Specifically, described power switch pipe can be IGBT pipe.
Specifically, described first control signal is PPG pulse signal, and described second control signal is high level signal, and described 3rd control signal is low level signal.
Specifically, under described first control signal and described second control signal act on jointly, described driver element exports the driving signal of the first driving voltage, under described first control signal and described 3rd control signal act on jointly, described driver element exports the driving signal of the second driving voltage, wherein, described first driving voltage is less than described second driving voltage.
For reaching above-mentioned purpose, on the other hand this utility model proposes a kind of electromagnetic heater, including the drive circuit of power switch pipe in described electromagnetic heater.
According to the electromagnetic heater that the utility model proposes, by the duty of the drive circuit adjustable power switching tube of power switch pipe in above-mentioned electromagnetic heater, thus power switch pipe when electromagnetic heater starts can be reduced and open the pulse current of moment, avoid burning power switch pipe, extend the service life of electromagnetic heater, and startup noise can be reduced, promote the experience of user.
Specifically, described electromagnetic heater can be electromagnetic oven, prevention electromagnetic pressure cooker or electromagnetic rice cooker.
Accompanying drawing explanation
This utility model combines accompanying drawing to will be apparent from easy to understand in the description of embodiment, wherein:
Fig. 1 is the block diagram of the drive circuit of power switch pipe in the electromagnetic heater according to this utility model embodiment；
Fig. 2 is the principle schematic of the drive circuit of power switch pipe in the electromagnetic heater according to one embodiment of this utility model；
Fig. 3 is the circuit theory diagrams of the drive circuit of power switch pipe in the electromagnetic heater according to one embodiment of this utility model；And
Fig. 4 is the circuit theory diagrams of the electromagnetic heater according to this utility model embodiment.
Reference:
Driver element 10, voltage transformation unit 20, control chip 30, power switch pipe the 100, first control output end OUT1 and second control output OUT2；
First resistance R1, photoelectrical coupler U1 and the first stabilivolt Z1；
Second resistance R2, the 3rd resistance R3, the first audion Q1, the second audion Q2, the 3rd audion Q3, the 6th resistance R6, the 4th audion Q4, the 7th resistance R7 and the 8th resistance R8；
Second stabilivolt Z2 and the 9th resistance R9；
The drive circuit 200 of power switch pipe, resonance circuit 300, power supply circuits 400, resonant capacitance C2, heating coil L2, rectifier bridge 401, filtration module 402, filter capacitor C3 and filter inductance L3 in electromagnetic heater.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining this utility model, and it is not intended that to restriction of the present utility model.
Below with reference to the accompanying drawings describe the drive circuit of power switch pipe in the electromagnetic heater that this utility model embodiment proposes and there is the electromagnetic heater of this power switch tube drives circuit.
Fig. 1 is the block diagram of the drive circuit of power switch pipe in the electromagnetic heater according to this utility model embodiment.As it is shown in figure 1, the drive circuit of power switch pipe includes in this electromagnetic heater: driver element 10, voltage transformation unit 20 and control chip 30.
Wherein, driver element 10 and power switch pipe 100 such as IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) pipe drive end be connected, driver element 10 output drive signal to power switch pipe 100 is to drive power switch pipe 100 on or off；Voltage transformation unit 20 is connected to adjust the driving voltage driving signal corresponding with driver element 10；Control chip 30 has the first control output end OUT1 and second and controls output OUT2, first control output end OUT1 is connected with driver element 10, second control output end OUT2 is connected with voltage transformation unit 20, control chip 30 controls signal to driver element 10 by the first control output end OUT1 output first and controls signal to voltage transformation unit 20 so that power switch pipe 100 is operated in magnifying state by the second control output end OUT2 output second, and control signal to driver element 10 by the first control output end OUT1 output first and the 3rd control signal to voltage transformation unit 20 so that power switch pipe 100 is operated in saturation conduction state by the second control output end OUT2 output.
That is, control chip 50 exportable first controls signal to driver element 10, to drive power switch pipe 100 on or off by driver element 10, and exportable second control signal of control chip 50 or the 3rd controls signal to voltage transformation unit 20, to be adjusted the driving voltage driving signal corresponding by voltage transformation unit 20.
Specifically, the driving signal of the exportable first driving voltage V1 of driver element 10 under the first control signal and the second control signal act on jointly, the driving signal of the exportable second driving voltage V2 of driver element 10 under the first control signal and the 3rd control signal act on jointly, wherein, first driving voltage V1 is less than the second driving voltage V2, the V1 gate drive voltage value as power switch pipe magnifying state can be set, the V2 gate drive voltage value as power switch pipe saturation conduction state can be set.
It should be noted that, power switch pipe 100 is operated in different duties under the driving of different driving voltage, such as, when the driving voltage driving signal is the first driving voltage V1, power switch pipe 100 is operated in magnifying state, when the driving voltage driving signal is the second driving voltage V2, power switch pipe 100 is operated in saturation conduction state.
In an embodiment of the present utility model, after electromagnetic heater begins to warm up, the startup stage that electromagnetic heater successively entering and normal heating phases, startup stage time, control chip 30 exports second and controls signal to voltage transformation unit 20 so that power switch pipe 100 is operated in magnifying state, the first driving voltage flowing through the electric current of power switch pipe 100 corresponding with driving signal is relevant, so under the driving driving signal of the first driving voltage, it is possible to decrease power switch pipe 100 opens the pulse current of moment；At normal heating phases, control chip 30 exports the 3rd and controls signal to voltage transformation unit 20 so that power switch pipe 100 is in saturation conduction state, power switch pipe 100 is equivalent to the switch of a conducting when turning on, electromagnetic heater carries out normal resonance heating to pan.
Thus, the drive circuit of power switch pipe in the electromagnetic heater of this utility model embodiment, by adjusting the duty of power switch pipe, power switch pipe when electromagnetic heater starts can be reduced and open the pulse current of moment, thus avoid burning power switch pipe, and reduce startup noise, promote the experience of user.
According to an embodiment of the present utility model, as in figure 2 it is shown, the first control signal can be PPG (Programe Pulse Generator, programmable pulse generator) pulse signal, second control signal can be high level signal, and the 3rd control signal can be low level signal.Wherein, when control chip 30 exports high level signal to voltage transformation unit 20, it is the first driving voltage V1 that driver element 10 exports the driving voltage of the drive end to power switch pipe 100；When control chip 30 output low level signal is to voltage transformation unit 20, it is the second driving voltage V2 that driver element 10 exports the driving voltage of the drive end to power switch pipe 100.
Specifically, the startup stage of as in figure 2 it is shown, T1 is, T2 is normal heating phases.When electromagnetic heater is in startup stage during T1, control chip 30 exports high level signal to voltage transformation unit 20, driver element 10 exports the driving signal of the first driving voltage V1, power switch pipe 100 is in magnifying state, the electric current flowing through power switch pipe 100 is relevant with V1, thus the first driving voltage V1 that output is less, it is possible to decrease power switch pipe opens the pulse current of moment.
When electromagnetic heater is in normal heating phases T2, control chip 50 output low level signal is to voltage transformation unit 20, driver element 10 exports the driving signal of the second driving voltage V2, power switch pipe 100 is in saturation conduction state, power switch pipe 100 is equivalent to the switch of a conducting when turning on, driver element 10 can control power switch pipe 100 normally or shutoff according to PPG pulse signal, and then control electromagnetic heater carries out resonance heating to pan.
According to an embodiment of the present utility model, as it is shown on figure 3, voltage transformation unit 20 includes: the first resistance R1, photoelectrical coupler U1 and the first stabilivolt Z1.
Wherein, one end of the first resistance R1 is connected with the second control output end OUT1 of control chip 30；First pin 1 of photoelectrical coupler U1 is preset power supply VCC with first and is connected, and second pin 2 of photoelectrical coupler U1 is connected with the other end of the first resistance R1；The negative electrode of the first stabilivolt Z1 is connected with the three-prong 3 of photoelectrical coupler U1, and the anode of the first stabilivolt Z1 is connected with the 4th pin 4 of photoelectrical coupler U1, and the first stabilivolt Z1 is connected in driver element 10.
Specifically, after control chip 30 is by the first control output end OUT1 output PPG pulse signal to driver element 10, when control chip 30 exports high level signal by the second control output end OUT2, luminous tube between first pin 1 and second pin 2 of photoelectrical coupler U1 is not turned on, light sensitive diode cut-off between three-prong 3 and the 4th pin 4 of photoelectrical coupler U1, A point voltage is for approximating the first driving voltage V1, and now power switch pipe 100 such as IGBT pipe is in magnifying state；When control chip 30 is by the second control output end OUT2 output low level signal, the luminous tube conducting luminescence of photoelectrical coupler U1, the light sensitive diode causing photoelectrical coupler U1 turns on, first stabilivolt Z1 is ineffective, A point voltage approximates the second driving voltage V2, the pressure drop that pressure drop is light sensitive diode because of the first stabilivolt Z1 two ends, the pressure drop of light sensitive diode is the least to be negligible, therefore the second driving voltage V2 is more than the first driving voltage V1, power switch pipe 100 such as IGBT pipe is in saturation conduction state.
Wherein, it should be appreciated that the first driving voltage V1 approximates the second driving voltage V2 and deducts the pressure drop of the first stabilivolt Z1.
According to an embodiment of the present utility model, as it is shown on figure 3, driver element 10 includes: the second resistance R2, the 3rd resistance R3, the first audion Q1, the second audion Q2, the 3rd audion Q3, the 6th resistance R6, the 4th audion Q4, the 7th resistance R7 and the 8th resistance R8.
Wherein, one end of the second resistance R2 is connected with the first control output end OUT1 of control chip 30；One end of 3rd resistance R3 is connected with one end and the first control output end OUT1 of the second resistance R2 respectively, the other end ground connection of the 3rd resistance R3；The base stage of the first audion Q1 is connected with the other end of the second resistance R2, the grounded emitter of the first audion Q1, the colelctor electrode of the first audion Q1 is preset power vd D by the 4th resistance R4 and second and is connected, and wherein, second presets power vd D also by the first electric capacity C1 ground connection；The base stage of the second audion Q2 is connected with the colelctor electrode of the first audion Q1, the grounded emitter of the second audion Q2, and the colelctor electrode of the second audion Q2 is preset power vd D by the 5th resistance R5 and second and is connected；The base stage of the 3rd audion Q3 is connected with the colelctor electrode of the second audion Q2, and the colelctor electrode of the 3rd audion Q3 and the anode of the first stabilivolt Z1 are connected；One end of 6th resistance R6 is connected with the negative electrode of the first stabilivolt Z1, and the other end of the 6th resistance R6 and second is preset power vd D and is connected；The base stage of the 4th audion Q4 is connected with the base stage of the 3rd audion Q3, the grounded collector of the 4th audion Q4；One end of 7th resistance R7 is connected with the emitter stage of the 4th audion Q4, and the other end of the 7th resistance R7 and the emitter stage of the 3rd audion Q3 are connected；One end of 8th resistance R8 is connected with the emitter stage of the 3rd audion Q3 and the other end of the 7th resistance R7 respectively, and the other end of the 8th resistance R8 is connected with the grid of the drive end such as IGBT pipe of power switch pipe 100.
Such as the example of Fig. 3, power switch pipe 100 can be IGBT pipe.First switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3 can be all NPN type triode, and the 4th switching tube Q4 can be PNP type triode.
According to such as the embodiment of Fig. 3, in electromagnetic heater, the drive circuit of power switch pipe also includes: the second stabilivolt Z2 and the 9th resistance R9.
Wherein, the anode of the second stabilivolt Z2 be connected with the emitter stage of power switch pipe 100 after ground connection, the negative electrode of the second stabilivolt Z2 is connected with the drive end of power switch pipe 100；9th resistance R9 and the second stabilivolt Z2 is in parallel.
Example in conjunction with Fig. 3, the operation principle of the drive circuit of this utility model embodiment is as follows: when the PPG pulse signal that control chip 30 exports to driver element 10 is high level, this high level is by the base stage of the second resistance R2 input to the first switching tube Q1, make the first switching tube Q1 conducting, second switch pipe Q2 ends, 3rd switching tube Q3 conducting, 4th switching tube Q4 cut-off, if now control chip 30 exports high level signal to voltage transformation unit 20, the then light sensitive diode cut-off of photoelectrical coupler U1, first driving voltage V1 of A point is the 6th resistance R6, first stabilivolt Z1, 3rd switching tube Q3, 8th resistance R8 and the 9th resistance R9 is to the second dividing potential drop presetting power vd D, IGBT pipe turns at magnifying state；If control chip 30 output low level signal is to voltage transformation unit 20, the then light sensitive diode conducting of photoelectrical coupler U1, the resistance of light sensitive diode is ignored because of the least, second driving voltage V2 of A point is that the 6th resistance R6, the 3rd switching tube Q3, the 8th resistance R8 and the 9th resistance R9 are to the second dividing potential drop presetting power vd D, firstth driving voltage V1 is less than two driving voltage V2, and IGBT pipe turns in saturation conduction state.
When the PPG pulse signal of control chip 30 output to driving module 10 is low level, this low level is by the base stage of the second resistance R2 input to the first switching tube Q1, make the first switching tube Q1 cut-off, second switch pipe Q2 conducting, the 3rd switching tube Q3 cut-off, the 4th switching tube Q4 conducting, now A point voltage is the cut-off of 0V, IGBT pipe.
It should be noted that, the resistance of the 6th resistance R6 and the 8th resistance R8 can be much smaller than the resistance of the 9th resistance R9, so, when the light sensitive diode of photoelectrical coupler U1 ends, A point voltage can be evaluated whether to be the second voltage presetting power vd D voltage of first deducting the first stabilivolt Z1, then deducts the voltage between colelctor electrode and the emitter stage of the 3rd switching tube Q3；When the light sensitive diode of photoelectrical coupler U1 turns on, A point voltage can be evaluated whether to be the second voltage presetting power vd D voltage of deducting between colelctor electrode and the emitter stage of the 3rd switching tube Q3, when the 3rd switching tube Q3 saturation conduction, voltage between colelctor electrode and the emitter stage of the 3rd switching tube Q3 is minimum, and therefore the second driving voltage V2 is slightly less than VDD.
To sum up, according to the drive circuit of power switch pipe in the electromagnetic heater that this utility model embodiment proposes, control chip controls signal to driver element by the first control output end output first and controls signal to voltage transformation unit by the second control output end output second so that power switch pipe is operated in magnifying state, and controls signal to driver element by the first control output end output first and control signal to voltage transformation unit so that power switch pipe is operated in saturation conduction state by the second control output end output the 3rd.Thus, in electromagnetic heater, the drive circuit of power switch pipe is by adjusting the duty of power switch pipe, can reduce power switch pipe when electromagnetic heater starts and open the pulse current of moment, thus avoid burning power switch pipe, and reduce startup noise, promote the experience of user.
Finally, this utility model embodiment also proposed a kind of should the electromagnetic heater of the drive circuit of power switch pipe in electromagnetic heater.According to a concrete example of the present utility model, electromagnetic heater can be electromagnetic oven, prevention electromagnetic pressure cooker or electromagnetic rice cooker.
As shown in Figure 4, the drive circuit 200 of power switch pipe during the electromagnetic heater of this utility model embodiment includes above-mentioned electromagnetic heater.Wherein, in electromagnetic heater, the drive circuit 200 of power switch pipe is connected with the drive end of power switch pipe 100, and in electromagnetic heater, the drive circuit 200 of power switch pipe for adjusting the duty of power switch pipe according to the operation phase residing for electromagnetic heater.
Specifically, the drive circuit 200 of power switch pipe can include driver element 10, voltage transformation unit 20 and control chip 30 etc., control chip 30 exports first and controls signal to driver element 10 and output second controls signal to voltage transformation unit 20 so that power switch pipe 100 is operated in magnifying state, and exports first and control signal to driver element 10 and output the 3rd controls signal to voltage transformation unit 20 so that power switch pipe 100 is operated in saturation conduction state.
As shown in Figure 4, the electromagnetic heater of this utility model embodiment also includes: resonance circuit 300 and power supply circuits 400.Wherein, resonance circuit 300 includes that the resonant capacitance C2 being connected in parallel and heating coil L2, the resonant capacitance C2 being connected in parallel are connected with the colelctor electrode of power switch pipe 100 with one end of heating coil L2, the grounded emitter of power switch pipe 100；Power supply circuits 400 and the resonant capacitance C2 being connected in parallel and the other end of heating coil L2, power supply circuits 400 are for powering for resonance circuit 300.
Specifically, power supply circuits 400 can include rectifier bridge 401 and filtration module 402, and rectifier bridge 401 is for carrying out rectification with the unidirectional current after output rectification to the alternating current of alternating current power supply AC input；Filtration module 402 includes filter capacitor C3 and filter inductance L3, the filtration module 402 unidirectional current after being filtered the unidirectional current after rectification with output rectification filter, and the unidirectional current supply resonance circuit 300 after rectifying and wave-filtering.
When electromagnetic heater stops heating, due to the existence of filter capacitor C3, the collector voltage of power switch pipe 100 is by 1.4 times of alternating current power supply AC voltage.After electromagnetic heater begins to warm up, the startup stage that electromagnetic heater successively entering and normal heating phases, startup stage time, the drive circuit 200 of power switch pipe exports the first driving voltage V1 to power switch pipe 100, power switch pipe 100 is in magnifying state, the electric current flowing through power switch pipe 100 is relevant with V1, thus the first driving voltage V1 that output is less, it is possible to decrease power switch pipe opens the pulse current of moment；At normal heating phases, the drive circuit 200 of power switch pipe exports the second driving voltage V2 to power switch pipe 100, power switch pipe 100 is in saturation conduction state, and power switch pipe 100 is equivalent to the switch of a conducting when turning on, electromagnetic heater carries out normal resonance heating to pan.
To sum up, the electromagnetic heater proposed according to this utility model embodiment, by the duty of the drive circuit adjustable power switching tube of power switch pipe in above-mentioned electromagnetic heater, thus power switch pipe when electromagnetic heater starts can be reduced and open the pulse current of moment, avoid burning power switch pipe, extend the service life of electromagnetic heater, and startup noise can be reduced, promote the experience of user.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", on " ", D score, " front ", " afterwards ", " left ", " right ", " vertically ", " level ", " push up ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumferential " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood as the case may be.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment of the present utility model or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combine by those skilled in the art.
Although above it has been shown and described that embodiment of the present utility model, it is understandable that, above-described embodiment is exemplary, it is not intended that to restriction of the present utility model, above-described embodiment can be changed in the range of this utility model, revises, replace and modification by those of ordinary skill in the art.
Claims (10)
1. the drive circuit of power switch pipe in an electromagnetic heater, it is characterised in that including:
Driver element, described driver element is connected with the drive end of described power switch pipe, and the output of described driver element drives letter
Number to described power switch pipe to drive described power switch pipe on or off；
Voltage transformation unit, described voltage transformation unit to adjust described driving signal corresponding driving voltage connected with described driver element；
Control chip, described control chip has the first control output end and the second control output end, and described first controls output
End is connected with described driver element, and described second control output end is connected with described voltage transformation unit, and described control chip passes through institute
State the first control output end output first and control signal to described driver element and by described second control output end output second
Control signal to described voltage transformation unit so that described power switch pipe is operated in magnifying state, and control output by described first
End output described first is controlled signal to described driver element and is controlled signal to by described second control output end output the 3rd
Described voltage transformation unit is so that described power switch pipe is operated in saturation conduction state.
The drive circuit of power switch pipe in electromagnetic heater the most according to claim 1, it is characterised in that described
Voltage transformation unit includes:
First resistance, one end of described first resistance is connected with described second control output end；
Photoelectrical coupler, the first pin of described photoelectrical coupler and first presets power supply and is connected, the of described photoelectrical coupler
Two pins are connected with the other end of described first resistance；
First stabilivolt, the negative electrode of described first stabilivolt is connected with the three-prong of described photoelectrical coupler, described first steady
The anode of pressure pipe is connected with the 4th pin of described photoelectrical coupler, and described first stabilivolt is connected in described driver element.
The drive circuit of power switch pipe in electromagnetic heater the most according to claim 2, it is characterised in that described
Driver element includes:
Second resistance, one end of described second resistance is connected with described first control output end；
3rd resistance, one end of described 3rd resistance respectively with one end of described second resistance and described first control output end phase
Even, the other end ground connection of described 3rd resistance；
First audion, the base stage of described first audion is connected with the other end of described second resistance, described first audion
Grounded emitter, the colelctor electrode of described first audion by the 4th resistance and second preset power supply be connected；
Second audion, the base stage of described second audion is connected with the colelctor electrode of described first audion, described two or three pole
The grounded emitter of pipe, the colelctor electrode of described second audion is preset power supply by the 5th resistance with described second and is connected；
3rd audion, the base stage of described 3rd audion is connected with the colelctor electrode of described second audion, described three or three pole
The colelctor electrode of pipe is connected with the anode of described first stabilivolt；
6th resistance, one end of described 6th resistance is connected with the negative electrode of described first stabilivolt, another of described 6th resistance
End is preset power supply with described second and is connected；
4th audion, the base stage of described 4th audion is connected with the base stage of described 3rd audion, described 4th audion
Grounded collector；
7th resistance, one end of described 7th resistance is connected with the emitter stage of described 4th audion, described 7th resistance another
One end is connected with the emitter stage of described 3rd audion；
8th resistance, one end of described 8th resistance another with the emitter stage of described 3rd audion and described 7th resistance respectively
One end is connected, and the described other end of the 8th resistance is connected with the drive end of described power switch pipe.
The drive circuit of power switch pipe in electromagnetic heater the most according to claim 3, it is characterised in that described
First audion, described second audion, described 3rd audion are NPN type triode, and described 4th audion is institute
State PNP type triode.
5. according to the drive circuit of power switch pipe in the electromagnetic heater according to any one of claim 1-4, its feature
It is, also includes:
Second stabilivolt, the anode of described second stabilivolt be connected with the emitter stage of described power switch pipe after ground connection, described the
The negative electrode of two stabilivolts is connected with the drive end of described power switch pipe；
9th resistance, described 9th resistance is in parallel with described second stabilivolt.
The drive circuit of power switch pipe in electromagnetic heater the most according to claim 1, it is characterised in that described
Power switch pipe is IGBT pipe.
The drive circuit of power switch pipe in electromagnetic heater the most according to claim 1, it is characterised in that described
First control signal is PPG pulse signal, and described second control signal is high level signal, and described 3rd control signal is low
Level signal.
The drive circuit of power switch pipe in electromagnetic heater the most according to claim 1, it is characterised in that in institute
State the first control signal and described second control signal jointly acts on down described driver element and exports the driving letter of the first driving voltage
Number, under described first control signal and described 3rd control signal act on jointly, described driver element exports the second driving voltage
Driving signal, wherein, described first driving voltage be less than described second driving voltage.
9. an electromagnetic heater, it is characterised in that include according to the Electromagnetic Heating according to any one of claim 1-8
The drive circuit of power switch pipe in device.
Electromagnetic heater the most according to claim 9, it is characterised in that described electromagnetic heater be electromagnetic oven,
Prevention electromagnetic pressure cooker or electromagnetic rice cooker.
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| CN201620104592.6U CN205544904U (en) | 2016-02-02 | 2016-02-02 | Electromagnetic heating device and drive circuit of power switch pipe thereof |
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| CN201620104592.6U CN205544904U (en) | 2016-02-02 | 2016-02-02 | Electromagnetic heating device and drive circuit of power switch pipe thereof |
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| CN205544904U true CN205544904U (en) | 2016-08-31 |
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| CN108024406A (en) * | 2016-11-03 | 2018-05-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its control method and device |
| CN108347237A (en) * | 2017-08-28 | 2018-07-31 | 九阳股份有限公司 | The control method of electromagnetic heater |
| CN108347238A (en) * | 2017-08-28 | 2018-07-31 | 九阳股份有限公司 | The switch controlled circuit of electromagnetic heater |
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| CN108419322B (en) * | 2017-02-10 | 2020-12-22 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating system and heating control method and device thereof |
| CN108347237A (en) * | 2017-08-28 | 2018-07-31 | 九阳股份有限公司 | The control method of electromagnetic heater |
| CN108347238A (en) * | 2017-08-28 | 2018-07-31 | 九阳股份有限公司 | The switch controlled circuit of electromagnetic heater |
| CN108378689A (en) * | 2017-09-13 | 2018-08-10 | 九阳股份有限公司 | The abundant boiling method that electromagnetic heating pressure stews |
| CN108371471A (en) * | 2017-09-15 | 2018-08-07 | 九阳股份有限公司 | Electromagnetic heating electric rice cooker and its cooking methods |
| CN109691867A (en) * | 2017-10-24 | 2019-04-30 | 佛山市顺德区美的电热电器制造有限公司 | Split cooking apparatus and its method for heating and controlling and device |
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