CN207117587U - The switch controlled circuit of electromagnetic heater - Google Patents

The switch controlled circuit of electromagnetic heater Download PDF

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Publication number
CN207117587U
CN207117587U CN201721083099.1U CN201721083099U CN207117587U CN 207117587 U CN207117587 U CN 207117587U CN 201721083099 U CN201721083099 U CN 201721083099U CN 207117587 U CN207117587 U CN 207117587U
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China
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triode
voltage
module
output
lever selection
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CN201721083099.1U
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Chinese (zh)
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朱泽春
张伟
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Joyoung Co Ltd
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Joyoung Co Ltd
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Abstract

The utility model provides a kind of switch controlled circuit of electromagnetic heater,Including control module,Drive module and lever selection module,Lever selection module is connected with supply voltage,To be powered for the drive module,Control module includes the first output end being connected with drive module and the second output end being connected with lever selection module,First output end exports the first level signal or second electrical level signal,To control drive module driving switch pipe to be operated in cut-off state or conducting state,Second output end exports three level signal or the 4th level signal,To control lever selection module to produce the first driving voltage or the second driving voltage,Second driving voltage is more than first driving voltage,In the on-state,Drive module is operated in amplification conducting state according to the first driving voltage driving switch pipe,Drive module is operated in saturation conduction state according to the second driving voltage driving switch pipe.This programme can reduce dash current and operating noise.

Description

The switch controlled circuit of electromagnetic heater
Technical field
It the utility model is related to field of kitchen electric appliance, more particularly to a kind of switch controlled circuit of electromagnetic heater.
Background technology
Currently used electromagnetic oven is controlled using single IGBT to electromagnetic resonant circuit more, and in order to realize electromagnetic oven Low-power heating, frequently with the processing mode for losing ripple, i.e., carry out selectable intermittent-heating within each cycle of alternating current. This processing mode, IGBT turn on for big voltage firmly when opening, and this dash current to IGBT is larger, causes IGBT to use the longevity Life reduces, and operating noise is larger.
In order to solve this problem, industry proposes a kind of improvement project, i.e., increases in existing IGBT control circuits One controlling brancher, when the controlling brancher does not work, IGBT control circuits carry out traditional cut-off and ON operation, in the control When branch road works, the controlling brancher carries out partial pressure to the voltage of existing IGBT control circuits, so as to control IGBT decompression conductings.This Kind scheme can solve the problems, such as that above-mentioned IGBT dash currents are larger, operating noise is larger to a certain extent, but due to this The controlling brancher of scheme only plays a part of to be depressured the voltage in existing IGBT control circuits, when the controlling brancher not work When making, IGBT control circuits still can normal work, therefore when the controlling brancher occur damaging or occur by mistake control when, IGBT's Become traditional big voltage turns on situation firmly again for control, and is not easy to find in time.
Thus, it is necessory to provide a kind of technical scheme, the defects of to overcome above-mentioned prior art to exist.
Utility model content
Technical problem to be solved in the utility model is overcome the deficiencies in the prior art and provides a kind of Electromagnetic Heating It the switch controlled circuit of device, to reduce dash current and operating noise, while can avoid when antihypertensive effect fails, switch Manage the risk that can still work and bring.
In order to achieve the above object, a kind of technical scheme of the present utility model is as follows:
A kind of switch controlled circuit of electromagnetic heater, it includes control module and is connected with the switching tube Drive module, wherein, the switch controlled circuit of the electromagnetic heater also includes the level being connected with the drive module Selecting module, the lever selection module are connected with supply voltage, to be powered for the drive module to drive the switch Manage it is in running order, the control module include the first output end for being connected with the drive module and with level choosing The second connected output end of module is selected, first output end exports the first level signal or second electrical level signal, to control Stating drive module drives the switching tube to be operated in cut-off state or conducting state, and second output end exports the 3rd level letter Number or the 4th level signal, to control the lever selection module to produce the first driving voltage or the second driving voltage, described the Two driving voltages are more than first driving voltage, and in the on-state, the drive module drives according to the first driving voltage The switching tube is operated in amplification conducting state, and the drive module drives the switching tube to be operated according to the second driving voltage Saturation conduction state.
As the further improved technical scheme of the utility model, first level signal is high level pulse signal.
As the further improved technical scheme of the utility model, the second electrical level signal is low level pulse signal, The three level signal is high level signal, and the 4th level signal is low level signal.
As the further improved technical scheme of the utility model, duration of the three level signal be more than 0 and Less than or equal to 3ms.The dash current and operating noise that switching tube is subject to when can both reduce inspection pot within this time or start, Can avoid working long hours in amplification region again causes switching tube loss excessive.
As the further improved technical scheme of the utility model, the lever selection module includes voltage regulation unit, first Conducting branches and the second conducting branches, first conducting branches conducting and second conducting branches are disconnected with by the voltage stabilizing Unit is accessed between the supply voltage and the output end of the lever selection module, so as to the output of the lever selection module The first driving voltage of end output;First conducting branches shut-off and second conducting branches conducting are with by the voltage regulation unit Do not access between the output end of the supply voltage and the lever selection module, so as to the output end of the lever selection module Export the second driving voltage.
As the further improved technical scheme of the utility model, the voltage regulation unit includes the first voltage-regulator diode, institute State the negative pole connection supply voltage of the first voltage-regulator diode, the positive pole of first voltage-regulator diode and first conducting branches Connection, first conducting branches include the first triode, the second triode and the 3rd triode, first triode and institute State the control pole of the second triode with the second output end of the control module to be connected, first triode and the described 2nd 3 The grounded emitter of pole pipe, the colelctor electrode of first triode are connected to supply voltage, the colelctor electrode of second triode The control pole of the 3rd triode is connected to, the emitter stage of the 3rd triode is connected to first voltage-regulator diode Positive pole, the colelctor electrode of the 3rd triode are connected to the output end of the lever selection module.
As the further improved technical scheme of the utility model, second conducting branches include the 4th triode and the Five triodes, the control pole of the 4th triode are connected with the power circuit, the grounded emitter of the 4th triode, The colelctor electrode of 4th triode is connected with the control pole of the 5th triode, the emitter stage connection of the 5th triode To the power circuit, the colelctor electrode of the 5th triode is connected to the output end of the lever selection module.
As the further improved technical scheme of the utility model, the lever selection module also includes being connected on described the First resistor between the control pole of the colelctor electrode of two triodes and the 3rd triode, is connected to the 3rd triode Second resistance between control pole and emitter stage, the 3rd electricity being connected between the control pole of the 4th triode and supply voltage Resistance, the 4th resistance being connected between the colelctor electrode of the 4th triode and the control pole of the 5th triode, and it is connected to the 5th The 5th resistance between the control pole and emitter stage of triode.
As the further improved technical scheme of the utility model, the lever selection module also includes the pole of the second voltage stabilizing two Pipe, the negative pole of second voltage-regulator diode are connected to the emitter stage of the 3rd triode and first voltage-regulator diode At the tie point of positive pole, the plus earth of second voltage-regulator diode, first voltage-regulator diode and second voltage stabilizing Diode is 9V voltage-stabiliser tubes.
As the further improved technical scheme of the utility model, second driving voltage is 15V-18V, described first Driving voltage is 6V-12V.
In the technical solution of the utility model, lever selection module is connected with supply voltage, is drive by lever selection module Dynamic module for power supply, when lever selection module hinders for some reason not to work, drive module can not work because that can not be powered, and avoid In the prior art drive module still can the hard conduction mode work of the big voltage of tradition the defects of;Further, the level choosing Can also supply voltage be changed into different the first driving voltages or the second driving voltage of magnitude of voltage by selecting module, so as to realize with compared with Low voltage-driven switch pipe is operated in amplification conducting state, is operated in saturation conduction shape with higher voltage-driven switch pipe State, when examining pot, startup and low-power heating, controlling switch pipe is operated in amplification conducting state, can reduce electric current to IGBT's Impact, reduce operating noise.
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 The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only of the present utility model one A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the block diagram representation of the switch controlled circuit of electromagnetic heater in the embodiment of the utility model one;
Fig. 2 is the schematic diagram of the switch controlled circuit of electromagnetic heater in the embodiment of the utility model one;
Fig. 3 is the physical circuit figure of the switch controlled circuit of electromagnetic heater in the embodiment of the utility model one;
Fig. 4 is the switching tube work wave schematic diagram of electromagnetic heater in the embodiment of the utility model one;
Fig. 5 is the control pole tension of switching tube and the graph of relation of collector current in the embodiment of the utility model one.
Reference:
100- switching tubes;200- drive modules;300- control modules;400- lever selection modules;The conducting branch of 401- first Road;The conducting branches of 402- second;403- voltage regulation units;500- entirety drive circuits.
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 the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment one
Fig. 1 to Fig. 2 is referred to, the utility model provides a kind of switch controlled circuit of electromagnetic heater, and it includes Control module 300, the drive module 200 being connected with switching tube 100, and the lever selection being connected with the drive module 200 Module 400, the lever selection module 400 are connected with supply voltage VCC, and the control module 300 includes and the driving mould The first connected output end 31 of block 200 and the second output end 32 being connected with the lever selection module 400, described first is defeated Go out the first level signal of output of end 31 or second electrical level signal, to control the drive module 200 to drive the work of switching tube 100 Make in cut-off state or conducting state, second output end 32 exports three level signal or the 4th level signal to the electricity Flat selecting module 400, to control the lever selection module 400 that the supply voltage VCC is changed into different of magnitude of voltage One driving voltage or the second driving voltage are exported to the drive module 200, in the on-state, the drive module 200 The switching tube 100 is driven to be operated in amplification conducting state according to the first driving voltage, the drive module 200 is according to the second driving Voltage drives the switching tube 100 to be operated in saturation conduction state.
Lever selection module 400 of the present utility model is connected with supply voltage VCC, is driving by lever selection module 400 Module 200 is powered, and when lever selection module 400 hinders for some reason not to work, drive module 200 can not work because it can not be powered Make, avoid in the prior art drive module 200 still can the hard conduction mode work of the big voltage of tradition the defects of.Further, The lever selection module 400 can also change into supply voltage VCC the first different driving voltage of magnitude of voltage or the second driving Voltage, amplification conducting state is operated in, with higher voltage-driven switch with relatively low voltage-driven switch pipe 100 so as to realize Pipe 100 is operated in saturation conduction state, and when examining pot, startup and low-power heating, controlling switch pipe 100 is operated in amplification conducting State, impact of the electric current to IGBT can be reduced, reduce operating noise.
Referring to Fig. 2, in the present embodiment, the lever selection module 400 includes the conducting branch of voltage regulation unit 403, first The conducting branches 402 of road 401 and second.The voltage regulation unit 403 and first conducting branches 401 are connected to the supply voltage Between the output terminals A of VCC and lever selection module 400 point, second conducting branches 402 are connected to the supply voltage VCC Between the output terminals A point of lever selection module 400.First conducting branches 401 and second conducting branches 402 with Second output end 32 of the control module 300 is connected, and when the control of the second output end 32 output one of the control module 300 During signal, one of them in first conducting branches 401 and second conducting branches 402 is cut-off, another shut-off.Example Such as, when the three level signal that the second output end 32 of control module 300 exports is high level signal, the first conducting branch Road 401 turns on, the second conducting branches 402 turn off, now the supply voltage VCC, voltage regulation unit 403, the first conducting branches 401st, the output terminals A of lever selection module 400 forms path, and now the voltage of A points is the first driving voltage, and it is supply voltage VCC subtract by voltage regulation unit 403 decline after voltage (the first conducting branches 401 be arranged to decompression it is smaller, can ignore not Meter);When the 4th level signal that the second output end 32 of control module 300 exports is low level signal, first conducting Branch road 401 turns off, the second conducting branches 402 are open-minded, and now the supply voltage VCC passes through the second conducting branches 402 and output A is held to form path, now the voltage of A points is the second driving voltage, and it is that (the second conducting branches 402 are arranged to supply voltage VCC Decompression it is smaller, can be ignored), i.e., described lever selection module 400 can produce the first different driving voltage of magnitude of voltage or Second driving voltage, when producing less first driving voltage of magnitude of voltage to the drive module 200, controllable switch pipe 100 are operated in amplification conducting state, when larger the second driving voltage to the drive module 200 of generation magnitude of voltage, then may be used Controlling switch pipe 100 is operated in saturation conduction state.Regardless of whether be caused by lever selection module 400 first driving voltage or Second driving voltage, drive module 200 need the power supply of lever selection module 400 to work, and this guarantees switching tube 100 Whether to work with whether powering for lever selection module 400 be direct correlation, it is only to avoid drive module in the prior art It is vertical power bring the defects of can still being worked with the hard conduction mode of traditional big voltage.This programme passes through in lever selection module 400 set supply voltage VCC, on the one hand to be powered for drive module 200, ensure that its driving switch pipe 100 is in work shape State, on the other hand supply voltage VCC can be changed into the different driving voltage of at least two magnitudes of voltage, with driving switch pipe 100 It is operated in amplification conducting or saturation conduction state.And it should be noted that the magnitude of voltage at the control pole of switching tube 100 can not It is identical with the magnitude of voltage of the output terminals A point of lever selection module 400, if there is clearly corresponding relation therewith, for example (,) it is defeated Go out to hold the exportable one high and one low voltage of A points, the control pole of switching tube 100 is corresponding to be with one high and one low voltage Can, without requiring that the magnitude of voltage of the control pole of switching tube 100 is identical with the magnitude of voltage of output terminals A point.
Further, second driving voltage is 15V-18V;First driving voltage is 6V-12V, preferably 9V. Referring to Fig. 5, when driving IGBT switching tubes with 9V driving voltage, IGBT switching tubes are operated in amplification conducting state, impact Electric current and operating noise are smaller.
Herein it should be noted that the switching tube is in running order to specifically include cut-off state, amplification conducting state With saturation conduction state, three states are all to be in the state in the case of being powered in switching tube, belong to working condition;And Off position refers to that switching tube is not powered on, and itself and cut-off state are not same concepts.In addition, the example above is when control mould During the second output end 32 output high level signal of block 300, the first conducting branches 401 turn on, the second conducting branches 402 turn off, Second output end 32 exports then opposite during low level signal;It is understood that it can certainly be arranged to work as control module 300 The second output end 32 output low level signal when, the first conducting branches 401 turn on, the second conducting branches 402 turn off, and second is defeated Go out then opposite during the output high level signal of end 32.That is, achievable first conducting branches 401 turn on and second conducting branches Between 402 disconnect so that voltage regulation unit 403 is accessed into the output terminals A of the supply voltage VCC and the lever selection module, so as to The output end of the lever selection module 400 exports the first driving voltage;Or first conducting branches 401 turn off and described Second conducting branches 402 are turned on so that the voltage regulation unit 403 is not accessed into the supply voltage VCC and the lever selection module Output terminals A between, so as to the lever selection module 400 output end export the second driving voltage.
Embodiment two
Fig. 3 and Fig. 4 are referred to, it implements electricity for the switch controlled circuit one of the utility model electromagnetic heater Road figure and switching tube work wave schematic diagram.Its circuit structure is described more fully below.
Wherein, control module 300 is specifically as follows miniature control chip MCU, lever selection module 400 and drive module 200 both cooperations form a complete overall drive circuit 500, and the output end of overall drive circuit 500 is connected to switching tube 100 Control pole with driving switch pipe 100.First output end 31 of the control module 300 is connected to the drive module 200, the Two output ends 32 are connected to lever selection module 400.The lever selection module 400 is connected with supply voltage VCC, the level Selecting module 400 includes voltage regulation unit 403, the first conducting branches 401 and the second conducting branches 402, and the voltage regulation unit 403 wraps The first voltage-regulator diode ZD303, the first voltage-regulator diode ZD303 negative pole connection supply voltage VCC is included, described first is steady Pressure diode ZD303 positive pole is connected with first conducting branches 401, and first conducting branches 401 include the one or three pole Pipe Q306, the second triode Q304 and the 3rd triode Q302, the first triode Q306 and the second triode Q304 Control pole be connected with the second output end 32 of the control module 300, the first triode Q306 and the two or three pole Pipe Q304 grounded emitter, the colelctor electrode of the first triode Q306 are connected to supply voltage VCC, second triode Q304 colelctor electrode is connected to the control pole of the 3rd triode Q302, and the emitter stage of the 3rd triode Q302 is connected to The positive pole of the first voltage-regulator diode ZD303, emitter stage Q302 and first voltage-regulator diode of the 3rd triode The connection of ZD303 positive pole, and be grounded through the second voltage-regulator diode ZD302, the positive pole of the second voltage-regulator diode ZD302 connects Ground, the colelctor electrode of the 3rd triode Q302 are connected to the output terminals A point of the lever selection module 400.Preferably, it is described First voltage-regulator diode ZD303 and the second voltage-regulator diode ZD302 is 9V voltage-stabiliser tubes.Second conducting branches 402 Including the 4th triode Q305 and the 5th triode Q303, control pole and the power circuit of the 4th triode Q305 VCC is connected, the grounded emitter of the 4th triode Q305, the colelctor electrode and the described 5th 3 of the 4th triode Q305 Pole pipe Q303 control pole is connected, and the emitter stage of the 5th triode Q303 is connected to the power circuit VCC, and the described 5th Triode Q303 colelctor electrode is connected to the output terminals A point of the lever selection module 400.Wherein, first triode Q306, the second triode Q304, the 4th triode Q305 are NPN type triode, the 3rd triode Q302, the 5th triode Q303 is PNP type triode.
The lever selection module 400 also includes the colelctor electrode and the described 3rd 3 for being connected on the second triode Q304 First resistor R309 between pole pipe Q302 control pole, be connected to the 3rd triode Q302 control pole and emitter stage it Between second resistance R308, the 3rd resistor R311 being connected between the 4th triode Q305 control pole and supply voltage VCC, The 4th resistance R312 being connected between the 4th triode Q305 colelctor electrode and the 5th triode Q303 control pole, is connected to The 5th resistance R313 between 5th triode Q305 control pole and emitter stage, and it is connected to the second of control module 300 The 6th resistance R307 between the triode Q306 of output end 32 and first.The lever selection module also includes being connected in parallel in electricity Ground capacity C301 and electrochemical capacitor C300 between source voltage VCC and earth point.
The drive module 200 includes the 6th triode Q201, the 7th triode Q300 and the 8th triode Q301, described 6th triode Q201 control pole is connected to the first output end 31 of the control module 300, institute by the 7th resistance R304 The 6th triode Q201 grounded emitter is stated, the colelctor electrode of the 6th triode Q201 is connected to the 7th triode Q300 and the 8th triode Q301 control pole.The emitter stage of the 7th triode Q300 is with the 8th triode Q301's Emitter stage is connected, and the control pole of switching tube 100 is connected to by the 8th resistance R310, and the drive module 200 also includes negative Pole is connected to the switch control pole of control 100, the 3rd voltage-stabiliser tube ZD301 of plus earth, and with the 3rd voltage stabilizing 9th resistance R6 in parallel pipe ZD301.The colelctor electrode of the 7th triode Q300 by a pair of resistance R305 in parallel and R305-1 is grounded, and the control pole of the 8th triode Q301 is connected to lever selection module 400 by the tenth resistance R302 Output terminals A point, the colelctor electrode of the 8th triode Q301 are connected to level by a pair resistance R306 and R306-1 in parallel The output terminals A point of selecting module 400.The drive module 200 also includes the output terminals A point for being connected to lever selection module 400 The 11st resistance R303 between the first output end 31 of control module 300, and negative pole are connected to the of control module 300 4th voltage-stabiliser tube ZD300 of one output end 31, plus earth.Wherein, the 6th triode Q201 and the 8th triode Q301 For NPN type triode, the 7th triode Q300 is PNP type triode.
Also referring to Fig. 4, when electromagnetic heater is in high-power heated condition, the second of control module 300 is defeated It is low level 4th level signal to go out the output of end 32, and now triode Q306, Q304, Q302 ends, triode Q305, Q303 Conducting, now the voltage of output terminals A point is the second driving voltage, and about supply voltage VCC (because Q303 conduction voltage drops are smaller, can Ignore);The output pulse signal of the first output end 31 of control module 300, the pulse signal can be that PPG signals or PWM believe Number, illustrated below by taking PPG signals as an example, when PPG signals are the first level signal of high level, drive module 200 Triode Q201, Q300 are turned on, and Q301 cut-offs, now the voltage of B points is low level at the control pole of switching tube 100, switching tube IGBT is in cut-off state;When PPG signals are low level second electrical level signal, triode Q201, Q300 cut-off, Q301 are led It is logical, now B points voltage be about supply voltage VCC (because triode Q301 and resistance R306, R306-1, R310 pressure drop are smaller, can Ignore), the supply voltage VCC is arranged to 15V-18V, the IGBT characteristic curves according to Fig. 5, and now IGBT is in saturation Conducting state.
When electromagnetic oven, which is in small-power, to be started or examine pot state, the second output end 32 output of control module 300 is The three level signal of high level, now triode Q306, Q304, Q302 conductings, Q305, Q303 cut-off, the electricity of output terminals A point Press as the first driving voltage, about supply voltage VCC subtract voltage-stabiliser tube ZD303 magnitude of voltage (because Q302 conduction voltage drops are smaller, can Ignore);The first output end 31 output PPG signals of control module 300, when PPG signals are the first level signal of high level, Q201, Q300 are turned on, and Q301 cut-offs, now B points voltage is low level, and IGBT is in cut-off state;When PPG signals are low level Second electrical level signal when, Q201, Q300 cut-off, Q301 conducting, now B points voltage is about A point voltages VCC-ZD303, described First driving voltage may be configured as 6V-12V, preferably 9V, the IGBT characteristic curves according to Fig. 5, and now IGBT is in and put Big conducting state.After IGBT is operated in amplification conducting state for a period of time under the control in three level signal, second is defeated Low level 4th level signal can be exported again by going out end 32, electromagnetic oven is heated a period of time under IGBT saturation conduction states, Ensure overall heating power;The duration of the three level signal is more than 0 and is less than or equal to 5ms, preferably 1ms, 2ms, 3ms, dash current and operating noise during because can both reduce startup within this time, it can avoid again in amplification region for a long time Work causes switching tube loss excessive.
By the explanation of above example, the switch controlled electricity of electromagnetic heater provided by the utility model Road, its lever selection module 400 are connected with supply voltage VCC, are that drive module 200 is powered by lever selection module 400, work as electricity Flat selecting module 400 hinders for some reason when not working, and drive module 200 can not work because that can not be powered, and avoid existing skill In art drive module 200 still can the hard conduction mode work of the big voltage of tradition the defects of.Further, the lever selection module 400 can also change into supply voltage VCC magnitude of voltage different the first driving voltage or the second driving voltage, so as to realize with compared with Low voltage-driven switch pipe 100 is operated in amplification conducting state, is operated in saturation with higher voltage-driven switch pipe 100 and leads Logical state, when examining pot, startup and low-power heating, controlling switch pipe 100 is operated in amplification conducting state, can reduce electric current pair IGBT impact, reduce operating noise.The switch controlled circuit of the electromagnetic heater can be used in electromagnetic oven, electromagnetic heating lunch Stew, electromagnetic heating pressure pot, and in the culinary cuisine electrical equipment such as Electromagnetic Heating cooking machine.
In description of the present utility model, it is to be understood that term " " center ", " transverse direction ", " thickness ", " on ", " under ", The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " radial direction ", " circumference " are based on attached Orientation or position relationship shown in figure, it is for only for ease of and describes the utility model and simplify to describe, rather than instruction or hint Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this The limitation of utility model.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally;Can be Be joined directly together, can also be indirectly connected by intermediary, can be two element internals connection or two elements it is mutual Interactively.For the ordinary skill in the art, it can understand that above-mentioned term is new in this practicality as the case may be Concrete meaning in type.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to In this, any one skilled in the art is in the technical scope that the utility model discloses, the change that can readily occur in Change or replace, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with right It is required that protection domain be defined.

Claims (10)

1. a kind of switch controlled circuit of electromagnetic heater, it includes control module and the drive being connected with the switching tube Dynamic model block, it is characterised in that the switch controlled circuit of the electromagnetic heater also includes what is be connected with the drive module Lever selection module, the lever selection module are connected with supply voltage, described to drive to be powered for the drive module Switching tube is in running order, the control module include the first output end for being connected with the drive module and with the electricity The second connected output end of flat selecting module, first output end export the first level signal or second electrical level signal, with control Making the drive module drives the switching tube to be operated in cut-off state or conducting state, the electricity of the second output end output the 3rd Ordinary mail number or the 4th level signal, to control the lever selection module to produce the first driving voltage or the second driving voltage, institute State the second driving voltage and be more than first driving voltage, in the on-state, the drive module is according to the first driving voltage The switching tube is driven to be operated in amplification conducting state, the drive module drives the switch plumber according to the second driving voltage Make in saturation conduction state.
2. the switch controlled circuit of electromagnetic heater as claimed in claim 1, it is characterised in that the first level letter Number it is high level pulse signal.
3. the switch controlled circuit of electromagnetic heater as claimed in claim 1, it is characterised in that the second electrical level letter Number it is low level pulse signal, the three level signal is high level signal, and the 4th level signal is low level signal.
4. the switch controlled circuit of electromagnetic heater as claimed in claim 3, it is characterised in that the 3rd level letter Number duration be more than 0 and be less than or equal to 3ms.
5. the switch controlled circuit of the electromagnetic heater as any one of Claims 1-4, it is characterised in that institute Stating lever selection module includes voltage regulation unit, the first conducting branches and the second conducting branches, the first conducting branches conducting and Second conducting branches are disconnected so that the voltage regulation unit is accessed into the supply voltage and the output of the lever selection module Between end, the second driving voltage is exported so as to the output end of the lever selection module;The first conducting branches shut-off and institute The conducting of the second conducting branch is stated so that the voltage regulation unit not accessed to the output end of the supply voltage and the lever selection module Between, export the first driving voltage so as to the output end of the lever selection module.
6. the switch controlled circuit of electromagnetic heater as claimed in claim 5, it is characterised in that the voltage regulation unit bag The first voltage-regulator diode is included, the negative pole connection supply voltage of first voltage-regulator diode, first voltage-regulator diode is just Pole is connected with first conducting branches, and first conducting branches include the first triode, the second triode and the three or three pole Pipe, first triode and the control pole of second triode are connected with the second output end of the control module, described The grounded emitter of first triode and second triode, the colelctor electrode of first triode are connected to supply voltage, The colelctor electrode of second triode is connected to the control pole of the 3rd triode, the emitter stage connection of the 3rd triode To the positive pole of first voltage-regulator diode, the colelctor electrode of the 3rd triode is connected to the output of the lever selection module End.
7. the switch controlled circuit of electromagnetic heater as claimed in claim 6, it is characterised in that the second conducting branch Road includes the 4th triode and the 5th triode, and the control pole of the 4th triode is connected with the power circuit, and described The grounded emitter of four triodes, the colelctor electrode of the 4th triode is connected with the control pole of the 5th triode, described The emitter stage of 5th triode is connected to the power circuit, and the colelctor electrode of the 5th triode is connected to the lever selection The output end of module.
8. the switch controlled circuit of electromagnetic heater as claimed in claim 7, it is characterised in that the lever selection mould Block also includes the first resistor being connected between the colelctor electrode of second triode and the control pole of the 3rd triode, even The second resistance being connected between the control pole of the 3rd triode and emitter stage, it is connected to the control pole and electricity of the 4th triode 3rd resistor between the voltage of source, the 4th electricity being connected between the colelctor electrode of the 4th triode and the control pole of the 5th triode Resistance, and the 5th resistance being connected between the control pole of the 5th triode and emitter stage.
9. the switch controlled circuit of electromagnetic heater as claimed in claim 6, it is characterised in that the lever selection mould Block also includes the second voltage-regulator diode, the negative pole of second voltage-regulator diode be connected to the emitter stage of the 3rd triode with At the tie point of the positive pole of first voltage-regulator diode, the plus earth of second voltage-regulator diode, wherein described first Voltage-regulator diode and second voltage-regulator diode are 9V voltage-stabiliser tubes.
10. the switch controlled circuit of electromagnetic heater as claimed in claim 1, it is characterised in that second driving Voltage is 15V-18V, and first driving voltage is 6V-12V.
CN201721083099.1U 2017-08-28 2017-08-28 The switch controlled circuit of electromagnetic heater Active CN207117587U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721083099.1U CN207117587U (en) 2017-08-28 2017-08-28 The switch controlled circuit of electromagnetic heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721083099.1U CN207117587U (en) 2017-08-28 2017-08-28 The switch controlled circuit of electromagnetic heater

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CN207117587U true CN207117587U (en) 2018-03-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
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CN (1) CN207117587U (en)

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