CN108347238A - The switch controlled circuit of electromagnetic heater - Google Patents
The switch controlled circuit of electromagnetic heater Download PDFInfo
- Publication number
- CN108347238A CN108347238A CN201710750348.6A CN201710750348A CN108347238A CN 108347238 A CN108347238 A CN 108347238A CN 201710750348 A CN201710750348 A CN 201710750348A CN 108347238 A CN108347238 A CN 108347238A
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- China
- Prior art keywords
- triode
- voltage
- module
- lever selection
- selection module
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08112—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in bipolar transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08116—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in composite switches
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0081—Power supply means, e.g. to the switch driver
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The present invention provides a kind of switch controlled circuit of electromagnetic heater, it includes control module and the drive module that is connected with switching tube, the lever selection module being connected with the drive module, lever selection module is connected with supply voltage, control module includes the first output end being connected with drive module and the second output terminal being connected with lever selection module, second output terminal exports third level signal or the 4th level signal to lever selection module, to control, supply voltage is converted to the first different driving voltage of voltage value by lever selection module or the second driving voltage is exported to drive module, and the high level of the first output end output simultaneously replaces the pulse signal changed with low level to the drive module, to drive the switching tube to be operated in cut-off, amplification conducting, or saturation conduction state.The solution of the present invention reduces dash current and operating noise, while can avoid when antihypertensive effect fails, and switching tube can still work and the risk brought.
Description
Technical field
The present invention relates to field of kitchen electric appliance more particularly to a kind of switch controlled circuits of electromagnetic heater.
Background technology
Currently used electromagnetic oven mostly uses single IGBT and controls electromagnetic resonant circuit, and in order to realize electromagnetic oven
Low-power heating carry out selectable intermittent-heating within each period of alternating current frequently with the processing mode for losing wave.
This processing mode, IGBT are connected when opening for big voltage firmly, this is larger to the dash current of IGBT, and IGBT is caused 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 works, which divides the voltage of existing IGBT control circuits, 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 can still work normally, therefore when the controlling brancher occurs damaging or occur accidentally to control, IGBT's
Become traditional big voltage is connected situation firmly again for control, and is not easy to find in time.
Thus, it is necessory to provide a kind of technical solution, to overcome the problems of the above-mentioned prior art.
Invention content
A kind of electromagnetic heater is provided technical problem to be solved by the present invention lies in overcome the deficiencies in the prior art
Switch controlled circuit, to reduce dash current and operating noise, while can avoid when antihypertensive effect fails, switching tube is still
The risk that can be worked and bring.
In order to achieve the above object, a kind of technical solution of the invention is as follows：
A kind of switch controlled circuit of electromagnetic heater comprising control module and be connected with the switching tube
Drive module, wherein the switch controlled circuit of the electromagnetic heater further includes the level being connected with the drive module
Selecting module, the lever selection module are connected with supply voltage, and the control module includes being connected with the drive module
First output end and the second output terminal being connected with the lever selection module, the second output terminal output third level letter
Number or the 4th level signal to the lever selection module, the supply voltage is converted to controlling the lever selection module
The first different driving voltage of voltage value or the second driving voltage are exported to the drive module, and first output end simultaneously
Output high level replaces the pulse signal of variation with low level to the drive module, to drive the switching tube to be operated in cut-off
State or amplification conducting state or saturation conduction state.
As further improved technical scheme of the present invention, the third level signal be high level signal, the described 4th
Level signal is low level signal, and second driving voltage is more than first driving voltage.
As further improved technical scheme of the present invention, the duration of the third level signal is more than 0 and is less than
Equal to 5ms.The dash current and operating noise that switching tube is subject to when can not only reduce inspection pot within this time or start, but also can
Avoiding working long hours in amplification region causes switching tube loss excessive.
As further improved technical scheme of the present invention, the lever selection module includes voltage regulation unit, the first conducting
Branch and the second conducting branches, first conducting branches conducting and second conducting branches are disconnected with by the voltage regulation unit
It accesses between the supply voltage and the output end of the lever selection module, it is defeated to the output end of the lever selection module
Go out the first driving voltage；First conducting branches turn off and second conducting branches conducting is not to connect the voltage regulation unit
Enter between the supply voltage and the output end of the lever selection module, is exported to the output end of the lever selection module
Second driving voltage.
As further improved technical scheme of the present invention, the voltage regulation unit includes the first zener diode, and described the
The cathode of one zener diode connects supply voltage, and anode and first conducting branches of first zener diode connect
It connects, first conducting branches include the first triode, the second triode and third transistor, first triode and described
The control pole of second triode is connected with the second output terminal of the control module, first triode and the two or three pole
The emitter of pipe is grounded, and the collector of first triode is connected to supply voltage, and the collector of second triode connects
It is connected to the control pole of the third transistor, the emitter of the third transistor is being connected to first zener diode just
Pole, the collector of the third transistor are connected to the output end of the lever selection module.
As further improved technical scheme of the present invention, second conducting branches include the 4th triode and the five or three
The control pole of pole pipe, the 4th triode is connected with the power circuit, the emitter ground connection of the 4th triode, described
The collector of 4th triode is connected with the control pole of the 5th triode, and the emitter of the 5th triode is connected to institute
Power circuit is stated, the collector of the 5th triode is connected to the output end of the lever selection module.
As further improved technical scheme of the present invention, the lever selection module further includes being connected on the described 2nd 3
First resistor between the collector of pole pipe and the control pole of the third transistor is connected to the control of the third transistor
Second resistance between pole and emitter, the 3rd resistor being connected between the control pole and supply voltage of the 4th triode, even
The 4th resistance being connected between the collector and the control pole of the 5th triode of the 4th triode, and it is connected to the 5th triode
Control pole and emitter between the 5th resistance.
As further improved technical scheme of the present invention, the lever selection module further includes the second zener diode,
The cathode of second zener diode is connected to the emitter of the third transistor with first zener diode just
At the tie point of pole, the plus earth of second zener diode.
As further improved technical scheme of the present invention, first zener diode and second zener diode
It is 9V voltage-stabiliser tubes.
As further improved technical scheme of the present invention, second driving voltage is 15V-18V, first driving
Voltage is 6V-12V.
In technical scheme of the present invention, lever selection module is connected with supply voltage, is driving mould by lever selection module
Block is powered, and when lever selection module does not work because of failure, drive module can not work because being unable to get power supply, is avoided existing
There is drive module in technology still can the tradition defect that the hard conduction mode of voltage works greatly；Further, the lever selection mould
Supply voltage can be also converted to different the first driving voltages or the second driving voltage of voltage value by block, to realize with lower
Voltage-driven switch pipe is operated in amplification conducting state, is operated in saturation conduction state with higher voltage-driven switch pipe,
Examine pot, startup and when low-power heating, control switching tube be operated in amplification conducting state, can reduce electric current to the impact of IGBT,
Reduce operating noise.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to needed for embodiment
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the block diagram representation of the switch controlled circuit of electromagnetic heater in one embodiment of the invention；
Fig. 2 is the schematic diagram of the switch controlled circuit of electromagnetic heater in one embodiment of the invention；
Fig. 3 is the physical circuit figure of the switch controlled circuit of electromagnetic heater in one embodiment of the invention；
Fig. 4 is the switching tube work wave schematic diagram of electromagnetic heater in one embodiment of the invention；
Fig. 5 is the graph of relation of the control pole tension and collector current of switching tube in one embodiment of the invention.
Reference numeral：
100- switching tubes；200- drive modules；300- control modules；400- lever selection modules；The conducting branch of 401- first
Road；The second conducting branches of 402-；403- voltage regulation units；500- entirety driving circuits.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1 to Fig. 2 is referred to, the present invention provides a kind of switch controlled circuit of electromagnetic heater comprising control
Module 300, the drive module 200 being connected with switching tube 100, and the lever selection module that is connected with the drive module 200
400, the lever selection module 400 is connected with supply voltage VCC, and the control module 300 includes and the drive module 200
The first connected output end 31 and the second output terminal 32 being connected with the lever selection module 400, the second output terminal
32 output third level signals or the 4th level signal are to the lever selection module 400, to control the lever selection module
The supply voltage VCC is converted to the first different driving voltage of voltage value or the second driving voltage is exported to the drive by 400
Dynamic model block 200, and first output end 31 exports high level and replaces the pulse signal that changes with low level to the drive simultaneously
Dynamic model block 200, to drive the switching tube 100 to be operated in cut-off state or amplification conducting state or saturation conduction state.
The lever selection module 400 of the present invention is connected with supply voltage VCC, is drive module by lever selection module 400
200 power supplies, when lever selection module 400 does not work because of failure, drive module 200 can not work because being unable to get power supply,
Avoiding drive module 200 in the prior art still can the tradition defect that the hard conduction mode of voltage works greatly.Further, described
Supply voltage VCC can be also converted to different the first driving voltages or the second driving voltage of voltage value by lever selection module 400,
To realize amplification conducting state is operated in lower voltage-driven switch pipe 100, with higher voltage-driven switch pipe 100
It is operated in saturation conduction state, when examining pot, startup and low-power heating, control switching tube 100 is operated in amplification conducting state,
Can reduce electric current to the impact of IGBT, 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
Road 401 and the second conducting branches 402.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
The second output terminal 32 of the control module 300 is connected, and when one control of the second output terminal 32 of the control module 300 output
It when signal, is cut-off one of in first conducting branches 401 and second conducting branches 402, another shutdown.Example
Such as, when the third level signal of the second output terminal 32 of control module 300 output is high level signal, the first conducting branch
The conducting of road 401, the second conducting branches 402 turn off, at this time the supply voltage VCC, voltage regulation unit 403, the first conducting branches
401, the output terminals A of lever selection module 400 forms access, and the voltage of A points is the first driving voltage at this time, is supply voltage
VCC subtract by voltage regulation unit 403 decline after voltage (the first conducting branches 401 be set as decompression it is smaller, can ignore not
Meter)；When the 4th level signal that the second output terminal 32 of control module 300 exports is low level signal, first conducting
The shutdown of branch 401, the second conducting branches 402 are open-minded, and the supply voltage VCC passes through the second conducting branches 402 and output at this time
A is held to form access, the voltage of A points is the second driving voltage at this time, is that (the second conducting branches 402 are set as supply voltage VCC
Decompression is smaller, can be ignored), i.e., the lever selection module 400 can generate the first different driving voltage of voltage value or
Second driving voltage, when smaller the first driving voltage to the drive module 200 of generation voltage value, controllable switch pipe
100 are operated in amplification conducting state, when larger the second driving voltage to the drive module 200 of generation voltage value, then may be used
Control switching tube 100 is operated in saturation conduction state.Regardless of lever selection module 400 generate be the first driving voltage or
Second driving voltage, drive module 200 need the power supply of lever selection module 400 that could work, and this guarantees switching tubes 100
Work whether power supply with lever selection module 400 whether be direct correlation, it is only to avoid drive module in the prior art
The vertical defect that can be still worked with traditional big hard conduction mode of voltage brought of powering.This programme passes through in lever selection module
400 setting supply voltage VCC ensure that its driving switch pipe 100 is in work shape on the one hand to power for drive module 200
On the other hand supply voltage VCC can be converted to the different driving voltage of at least two voltage values, with driving switch pipe 100 by state
It is operated in amplification conducting or saturation conduction state.And it should be noted that the voltage value at 100 control pole of switching tube can not
It is identical as the voltage value of the output terminals A of lever selection module 400 point, if there is clearly corresponding relationship therewith, for example (,) it is defeated
The exportable one high and one low voltage of outlet A points, the control pole of switching tube 100 is corresponding to be with one high and one low voltage
Can, without requiring the voltage value of 100 control pole of switching tube identical with the voltage value 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 the driving voltage of 9V, IGBT switching tubes are operated in amplification conducting state, impact
Electric current and operating noise are smaller.
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, which is all to be in state in the case of energization in switching tube, belongs to working condition；And
Off position refers to that switching tube is not powered on, and cut-off state is not same concept.In addition, the example above is when control mould
When the second output terminal 32 of block 300 exports high level signal, the conducting of the first conducting branches 401, the shutdown of the second conducting branches 402,
Second output terminal 32 exports then opposite when low level signal；It is understood that can certainly be arranged to work as control module 300
Second output terminal 32 export low level signal when, the first conducting branches 401 conducting, the second conducting branches 402 shutdown, second is defeated
Outlet 32 exports then opposite when high level signal.I.e., it can be achieved that the conducting of the first conducting branches 401 and second conducting branches
402 disconnect to access voltage regulation unit 403 between the supply voltage VCC and the output terminals A of the lever selection module, thus
The output end of the lever selection module 400 exports the first driving voltage；Or first conducting branches 401 shutdown and described
Second conducting branches 402 are connected so that the voltage regulation unit 403 is not accessed the supply voltage VCC and the lever selection module
Output terminals A between, to the lever selection module 400 output end export the second driving voltage.
Embodiment two
Fig. 3 and Fig. 4 are please referred to, is that the switch controlled circuit one of electromagnetic heater of the present invention implements circuit diagram
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
Both 200 cooperations constitute a complete whole driving circuit 500, and the output end of whole driving 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 cathode connection supply voltage VCC of the first zener diode ZD303, the first zener diode ZD303 is included, described first is steady
The anode of pressure diode ZD303 is connect with first conducting branches 401, and first conducting branches 401 include the one or three pole
Pipe Q306, the second triode Q304 and third transistor Q302, the first triode Q306 and the second triode Q304
Control pole be connected with the second output terminal 32 of the control module 300, the first triode Q306 and the two or three pole
The emitter of pipe Q304 is grounded, and the collector of the first triode Q306 is connected to supply voltage VCC, second triode
The collector of Q304 is connected to the control pole of the third transistor Q302, and the emitter of the third transistor Q302 is connected to
The anode of the first zener diode ZD303, the emitter Q302 of the third transistor and first zener diode
The connection of the anode of ZD303, and through the second zener diode ZD302 ground connection, the anode of the second zener diode ZD302 connects
The collector on ground, the third transistor Q302 is connected to the output terminals A point of the lever selection module 400.Preferably, described
First zener diode ZD303 and the second zener 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 emitter ground connection of the 4th triode Q305, the collector and the described 5th 3 of the 4th triode Q305
The control pole of pole pipe Q303 is connected, and the emitter of the 5th triode Q303 is connected to the power circuit VCC, and the described 5th
The collector of triode Q303 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 third transistor Q302, the 5th triode
Q303 is PNP type triode.
The lever selection module 400 further includes being connected on the collector and the described 3rd 3 of the second triode Q304
First resistor R309 between the control pole of pole pipe Q302, be connected to the third transistor Q302 control pole and emitter it
Between second resistance R308, the 3rd resistor R311 being connected between the control pole and supply voltage VCC of the 4th triode Q305,
The 4th resistance R312 being connected between the collector and the control pole of the 5th triode Q303 of the 4th triode Q305, is connected to
The 5th resistance R313 between the control pole and emitter of 5th triode Q305, and it is connected to the second of control module 300
The 6th resistance R307 between output end 32 and the first triode Q306.The lever selection module further includes being connected in parallel in electricity
Ground capacity C301 between source voltage VCC and earth point and electrolytic capacitor C300.
The drive module 200 includes the 6th triode Q201, the 7th triode Q300 and the 8th triode Q301, described
The control pole of 6th triode Q201 is connected to the first output end 31 of the control module 300, institute by the 7th resistance R304
The emitter ground connection of the 6th triode Q201 is stated, the collector of the 6th triode Q201 is connected to the 7th triode
The control pole of Q300 and the 8th triode Q301.The emitter of the 7th triode Q300 is with the 8th triode Q301's
Emitter is connected, and the control pole of switching tube 100 is connected to by the 8th resistance R310, and the drive module 200 further includes bearing
Pole is connected to the third voltage-stabiliser tube ZD301 of the switch control pole of control 100, plus earth, and with the third voltage stabilizing
9th resistance R6 of pipe ZD301 parallel connections.The collector of the 7th triode Q300 by a pair of in parallel resistance R305 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
The collector of output terminals A point, the 8th triode Q301 is connected to level by a pair of resistance R306 and R306-1 in parallel
The output terminals A point of selecting module 400.The drive module 200 further includes being connected to the output terminals A point of lever selection module 400
Eleventh resistor R303 and cathode between the first output end 31 of control module 300 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
The output of outlet 32 is low level 4th level signal, and triode Q306, Q304, Q302 ends at this time, triode Q305, Q303
Conducting, at this time the voltage of output terminals A point be the second driving voltage, about supply voltage VCC (because Q303 conduction voltage drops are smaller, can
Ignore)；31 output pulse signal of the first output end of control module 300, the pulse signal can be PPG signals or pwm signal,
When pulse signal is high level, triode Q201, Q300 conducting of drive module 200, Q301 ends, at this time switching tube 100
Control pole at the voltage of B points be low level, switching tube IGBT is in cut-off state；When pulse signal is low level, three poles
Pipe Q201, Q300 cut-off, Q301 conductings, at this time B points voltage be about supply voltage VCC (because triode Q301 and resistance R306,
R306-1, R310 pressure drop are smaller, can be ignored), the supply voltage VCC is set as 15V-18V, and IGBT is special according to figure 5
Linearity curve, at this time IGBT be in saturation conduction state.
When electromagnetic oven, which is in small-power, to be started or examine pot state, the output of second output terminal 32 of control module 300 is
The third level signal of high level, at this time triode Q306, Q304, Q302 conductings, Q305, Q303 cut-off, the electricity of output terminals A point
Pressure be the first driving voltage, about supply voltage VCC subtract voltage-stabiliser tube ZD303 voltage value (because Q302 conduction voltage drops are smaller, can
Ignore)；First output end 31 of control module 300 exports PPG signals, and when pulse signal is high level, Q201, Q300 are led
Logical, Q301 cut-offs, B points voltage is low level at this time, and IGBT is in cut-off state；When pulse signal is low level, Q201,
Q300 ends, and Q301 conductings, B points voltage is about A point voltages VCC-ZD303 at this time, and first driving voltage may be configured as 6V-
12V, preferably 9V, IGBT characteristic curves according to figure 5, at this time IGBT be in amplification conducting state.When in third level
After so that IGBT is operated in amplification conducting state for a period of time under the control of signal, second output terminal 32 can export low level the again
Four level signals make electromagnetic oven heat a period of time under IGBT saturation conduction states, ensure whole heating power；The third
The duration of level signal is more than 0 and is less than or equal to 5ms, preferably 1ms, 2ms, 3ms, because can both subtract within this time
Dash current when small startup and operating noise, but can avoid amplification region work long hours cause switching tube loss it is excessive.
Illustrate the switch controlled circuit it is found that electromagnetic heater provided by the invention by above example,
Lever selection module 400 is connected with supply voltage VCC, is that drive module 200 is powered by lever selection module 400, when level selects
When selecting module 400 and not working because of failure, drive module 200 can not work due to being unable to get power supply, avoid in the prior art
Drive module 200 still can the tradition defect that the hard conduction mode of voltage works greatly.Further, the lever selection module 400
Supply voltage VCC can be also converted to voltage value different the first driving voltage or the second driving voltage, to realize with relatively low
Voltage-driven switch pipe 100 be operated in amplification conducting state, with higher voltage-driven switch pipe 100 be operated in saturation conduction
State, when examining pot, startup and low-power heating, control switching tube 100 is operated in amplification conducting state, can reduce electric current pair
The impact of IGBT reduces operating noise.The switch controlled circuit of the electromagnetic heater can be used in electromagnetic oven, electromagnetic heating lunch
In the culinary cuisines electric appliances such as pot, electromagnetic heating pressure pot and electromagnetic heating cooking machine.
In the description of the present invention, it is to be understood that, term "center", " transverse direction ", " thickness ", "upper", "lower", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside", " radial direction ", " circumferential direction " is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, do not indicate or imply the indicated
Device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as to the present invention's
Limitation.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ",
The terms such as " connection ", " fixation " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or at one
Body；It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements or two members
The interaction relationship of part.For the ordinary skill in the art, it can understand that above-mentioned term exists as the case may be
Concrete meaning in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, all answer by the change or replacement that can be readily occurred in
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of switch controlled circuit of electromagnetic heater comprising control module and the drive being connected with the switching tube
Dynamic model block, which is characterized in that the switch controlled circuit of the electromagnetic heater further includes being connected with the drive module
Lever selection module, the lever selection module are connected with supply voltage, and the control module includes and the drive module phase
The first output end even and the second output terminal being connected with the lever selection module, the second output terminal output third electricity
Ordinary mail number or the 4th level signal are turned the supply voltage with controlling the lever selection module to the lever selection module
The first different driving voltage of formation voltage value or the second driving voltage are exported to the drive module, and described first defeated simultaneously
Outlet output high level replaces the pulse signal of variation with low level to the drive module, to drive the switching tube to be operated in
Cut-off state or amplification conducting state or saturation conduction state.
2. the switch controlled circuit of electromagnetic heater as described in claim 1, which is characterized in that the third level letter
Number be high level signal, the 4th level signal be low level signal, second driving voltage be more than it is described first drive
Voltage.
3. the switch controlled circuit of electromagnetic heater as claimed in claim 2, which is characterized in that the third level letter
Number duration be more than 0 and be less than or equal to 5ms.
4. the switch controlled circuit of electromagnetic heater as claimed any one in claims 1 to 3, which is characterized in that institute
It includes voltage regulation unit, the first conducting branches and the second conducting branches to state lever selection module, the first conducting branches conducting and
Second conducting branches are disconnected so that the voltage regulation unit to be accessed to the output of the supply voltage and the lever selection module
Between end, the first driving voltage is exported to the output end of the lever selection module；The first conducting branches shutdown and institute
The conducting of the second conducting branches is stated so that the voltage regulation unit not accessed to the output of the supply voltage and the lever selection module
Between end, the second driving voltage is exported to the output end of the lever selection module.
5. the switch controlled circuit of electromagnetic heater as claimed in claim 4, which is characterized in that the voltage regulation unit packet
The first zener diode is included, the cathode of first zener diode connects supply voltage, and first zener diode is just
Pole is connect with first conducting branches, and first conducting branches include the first triode, the second triode and the three or three pole
The control pole of pipe, first triode and second triode is connected with the second output terminal of the control module, described
The emitter of first triode and second triode is grounded, and the collector of first triode is connected to supply voltage,
The collector of second triode is connected to the control pole of the third transistor, the emitter connection of the third transistor
To the anode of first zener diode, the collector of the third transistor is connected to the output of the lever selection module
End.
6. the switch controlled circuit of electromagnetic heater as claimed in claim 5, which is characterized 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
The emitter of four triodes is grounded, and the collector of the 4th triode is connected with the control pole of the 5th triode, described
The emitter of 5th triode is connected to the power circuit, and the collector of the 5th triode is connected to the lever selection
The output end of module.
7. the switch controlled circuit of electromagnetic heater as claimed in claim 6, which is characterized in that the lever selection mould
Block further includes the first resistor being connected between the collector and the control pole of the third transistor of second triode, even
The second resistance being connected between the control pole and emitter of the third transistor 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 collector and the control pole of the 5th triode of the 4th triode
It hinders, and the 5th resistance being connected between the control pole and emitter of the 5th triode.
8. the switch controlled circuit of electromagnetic heater as claimed in claim 5, which is characterized in that the lever selection mould
Block further includes the second zener diode, the cathode of second zener diode be connected to the emitter of the third transistor with
At the tie point of the anode of first zener diode, the plus earth of second zener diode.
9. the switch controlled circuit of electromagnetic heater as claimed in claim 8, which is characterized in that first voltage stabilizing two
Pole pipe and second zener diode are 9V voltage-stabiliser tubes.
10. the switch controlled circuit of electromagnetic heater as described in claim 1, which is characterized in that second driving
Voltage is 15V-18V, and first driving voltage is 6V-12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710750348.6A CN108347238A (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 |
|---|---|---|---|
| CN201710750348.6A CN108347238A (en) | 2017-08-28 | 2017-08-28 | The switch controlled circuit of electromagnetic heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108347238A true CN108347238A (en) | 2018-07-31 |
Family
ID=62961996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710750348.6A Pending CN108347238A (en) | 2017-08-28 | 2017-08-28 | The switch controlled circuit of electromagnetic heater |
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| CN (1) | CN108347238A (en) |
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| CN109769317A (en) * | 2019-02-18 | 2019-05-17 | 九阳股份有限公司 | A kind of heating control circuit and the electromagnetic heater with it |
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