CN203027519U - IGBT (Insulated Gate Bipolar Transistor) driving device for electromagnetic heating system - Google Patents
IGBT (Insulated Gate Bipolar Transistor) driving device for electromagnetic heating system Download PDFInfo
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- CN203027519U CN203027519U CN 201220657462 CN201220657462U CN203027519U CN 203027519 U CN203027519 U CN 203027519U CN 201220657462 CN201220657462 CN 201220657462 CN 201220657462 U CN201220657462 U CN 201220657462U CN 203027519 U CN203027519 U CN 203027519U
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Abstract
The utility model discloses an IGBT (Insulated Gate Bipolar Transistor) driving device for an electromagnetic heating system. The IGBT driving device comprises a detecting module, a controller, a first switch module, a second switch module and a third switch module, wherein the detecting module is used for generating a first detecting signal and a second detecting signal; the controller is connected with the detecting module, outputs a first control signal by a first output end, generates a second control signal according to the first detecting signal and the second detecting signal and outputs the second control signal by a second output end; the first switch module and the second switch module are respectively connected with the controller and generate a first driving signal and a second driving signal respectively according to the first control signal and the second control signal; and the third switch module is respectively connected with the first switch module and the second switch module and generates a switching signal according to the first driving signal and the second driving signal so as to control the switching on and the switching off of an IGBT. The IGBT driving device disclosed by the utility model has the advantages that the mistaken driving of the IGBT can be shielded and controlled, so that the IGBT can be protected from being switched on by mistake so as to avoid being damaged, and the reliability is improved.
Description
Technical field
The utility model relates to the electromagnetic heating technique field, particularly a kind of IGBT(Insulated Gate Bipolar Transistor for electromagnetic heating system, insulated gate bipolar transistor) drive unit.
Background technology
In the Electromagnetic Heating control circuit, control chip IC(Integrated Circuit when the C pole tension that normally detects IGBT by sync detection circuit reaches 0V, integrated circuit) just export control signal and make IGBT open-minded.Yet, when sync detection circuit is interfered, can produce rub-out signal, cause control chip IC to produce erroneous judgement, can when being in different value, the C of IGBT pole tension make at random IGBT open-minded, and cause the IGBT immediate current excessive and breakdown.
Wherein, Fig. 1 is the circuit diagram of prior art.As shown in Figure 1, pass through sync detection circuit, the state of real-time magnetic test coil dish both end voltage, detection signal is respectively VA, VB, the inner integrated comparator C MP of control chip IC compares VA and the VB that detects, when VB＜VA being detected, comparator C MP overturns, and output low level, produces interrupt requests, after control chip IC accepts interrupt requests, begin to postpone timing t, and when 0V was arrived in the C of IGBT electrode drop, control chip IC was from PPGO port output high level, drive the IGBT loop, make IGBT open-minded.Wherein, the schematic diagram of normal control signal as shown in Figure 2.That is to say, when PPGO output high level, triode Q121, Q123 conducting, triode Q122, Q124 cut-off, IGBT is driven opens work; When the PPGO output low level, triode Q121, Q123 cut-off, triode Q122, Q124 conducting, IGBT turn-offs.
Yet, when sync detection circuit is interfered, can produce rub-out signal, cause control chip IC to produce erroneous judgement, mistake is opened IGBT, makes IGBT not open-minded when the C pole tension is in 0V, causes that the immediate current of opening of IGBT is excessive punctures inefficacy.particularly, as shown in Figure 1, VA and VB be the inner integrated comparator C MP of access control chip IC respectively, be subject to the EMC(Electro Magnetic Compatibility such as impulse train or surge at sync detection circuit, when Electro Magnetic Compatibility) disturbing, the VA that collects, the VB signal mixes disturbing pulse, perhaps VA, VB voltage is greater than the input voltage maximum of comparator C MP, cause comparator C MP mistake overturn and export interference signal, thereby cause control chip IC output high level, make the IGBT conducting, the electric current that IGBT passes through is along with the time of conducting increases, long when the service time of IGBT, greatly about the 0.1ms left and right, IGBT can the overcurrent punch through damage.Signal schematic representation when wherein, control signal is interfered as shown in Figure 3.
Therefore, the shortcoming of prior art is, can produce rub-out signal when sync detection circuit is interfered, and causes control chip IC produce erroneous judgement and make IGBT mislead, thereby causes IGBT to damage.
The utility model content
The purpose of this utility model be to propose a kind of can shield that the mistake of controlling IGBT drives, protection IGBT can not mislead and damage, the IGBT drive unit that is used for electromagnetic heating system that reliability is high.
For achieving the above object, the IGBT drive unit that is used for electromagnetic heating system that the utility model proposes comprises: detection module, described detection module detect the voltage at coil panel two ends of electromagnetic heating system to generate the first detection signal and the second detection signal; Controller, described controller is connected with described detection module, described controller has the first output and the second output, described controller is exported the first control signal by described the first output, and generates the second control signal and export by described the second output according to described the first detection signal and the second detection signal; The first switch module and second switch module, described the first switch module is connected with described controller respectively with the second switch module, and described the first switch module and second switch module generate the first driving signal and the second driving signal according to described the first control signal and described the second control signal respectively; The 3rd switch module, described the 3rd switch module is connected with the second switch module with described the first switch module respectively, and described the 3rd switch module drives signal and described second according to described first and drives signal generation switching signal to control the turn-on and turn-off of IGBT.
According to the IGBT drive unit that is used for electromagnetic heating system that the utility model proposes; when detection module is interfered; produce rub-out signal; when making the output of controller mistake drive the IGBT signal; the rub-out signal that detection module produces can shield the mistake of controlling IGBT and drive; thereby protection IGBT can not open by mistake logical the damage, has improved reliability.
Wherein, described controller further comprises: comparing unit, described comparing unit is connected with described detection module, and described comparing unit generates comparison signal to control the second control signal of described the second output output according to described the first detection signal and the second detection signal.
And, described IGBT drive unit for electromagnetic heating system also comprises: power module, described power module is connected with described IGBT with the coil panel of described electromagnetic heating system respectively, and described power module provides working power for coil panel and the described IGBT of described electromagnetic heating system.
In addition, described IGBT drive unit for electromagnetic heating system also comprises: anti-jamming protector, described anti-jamming protector are connected between described IGBT and described the 3rd switch module, and described anti-jamming protector carries out anti-interference protection to described IGBT.
Further, described the first switch module comprises: the first resistance, and an end of described the first resistance is connected with the first output of described controller, receives described the first control signal; The first triode, the base stage of described the first triode is connected with the other end of described the first resistance, the grounded emitter of described the first triode; The second resistance, an end of described the second resistance is connected with the other end of described the first resistance, the other end ground connection of described the second resistance; The second triode, the base stage of described the second triode is connected with the collector electrode of described the first triode, and the collector electrode of described the second triode is as the output of described the first switch module, the grounded emitter of described the second triode; The 3rd resistance and first electric capacity of series connection, node between described the 3rd resistance and described the first electric capacity is connected with the base stage of described the second triode and the collector electrode of described the first triode respectively, one end of described the 3rd resistance is connected with power supply, an end ground connection of described the first electric capacity.
In the utility model, described second switch module further comprises: the 4th resistance, and an end of described the 4th resistance is connected with the second output of described controller; The 5th resistance, an end of described the 5th resistance is connected with the other end of described the 4th resistance, the other end ground connection of described the 5th resistance; The 3rd triode, the base stage of described the 3rd triode is connected with an end of described the 5th resistance, the grounded emitter of described the 3rd triode, the collector electrode of described the 3rd triode is as the output of described second switch module.
And described the 3rd switch module further comprises: the 6th resistance, an end of described the 6th resistance are connected with the collector electrode of described the second triode and the collector electrode of described the 3rd triode respectively; The 7th resistance, an end of described the 7th resistance is connected with the other end of described the 6th resistance, and the other end of described the 7th resistance is connected with described power supply; The 4th triode, the base stage of described the 4th triode is connected with an end of described the 7th resistance, and the collector electrode of described the 4th triode is connected with described power supply, and the emitter of described the 4th triode is connected with described IGBT; The 5th triode, the base stage of described the 5th triode is connected with the base stage of described the 4th triode, the grounded collector of described the 5th triode, the emitter of described the 5th triode is connected with described IGBT.
Wherein, described the 3rd switch module also comprises: the first current-limiting resistance, and an end of described the first current-limiting resistance is connected with the emitter of described the 4th triode, and the other end of described the first current-limiting resistance is connected with the emitter of described the 5th triode; The second current-limiting resistance, an end of described the second current-limiting resistance are connected with the emitter of described the 5th triode and the other end of the first current-limiting resistance respectively, and the other end of described the second current-limiting resistance is connected with described IGBT.
In addition; described anti-jamming protector further comprises: the 8th resistance and voltage stabilizing didoe parallel with one another; one end of described the 8th resistance and the negative pole end of described voltage stabilizing didoe are connected between described IGBT and described the 3rd switch module, and the other end of described the 8th resistance and the positive terminal of described voltage stabilizing didoe be ground connection respectively.
Adopt the electronic components such as resistance, triode, circuit performance is stable, and reliability is high, also greatly reduces simultaneously cost.
The aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or the additional aspect of the utility model and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the IGBT drive circuit figure of prior art;
Fig. 2 is normal control signal schematic diagram in prior art;
Fig. 3 is the signal schematic representation when in prior art, control signal is interfered;
Fig. 4 is the structural representation according to the IGBT drive unit that is used for electromagnetic heating system of the utility model embodiment;
Fig. 5 is the circuit diagram according to the IGBT drive unit that is used for electromagnetic heating system of an embodiment of the utility model;
Fig. 6 is the circuit diagram according to the comparing unit of the IGBT drive unit middle controller that is used for electromagnetic heating system of an embodiment of the utility model; And
Fig. 7 is the control signal schematic diagram according to an embodiment of the utility model.
Reference numeral:
controller 10, detection module 20, the first switch module 11, second switch module 12 and the 3rd switch module 13, coil panel 21, the first detection signal VA and the second detection signal VB, the first output I/O1 and the second output I/O2, power module 22, anti-jamming protector 14 and current limliting unit 15, comparing unit 16, the first resistance R 1, the first triode Q1, the second resistance R 2, the second triode Q2, the 3rd resistance R 3 and the first capacitor C 1, the 4th resistance R 4, the 5th resistance R 5 and the 3rd triode Q3, the 6th resistance R 6, the 7th resistance R 7, the 4th triode Q4 and the 5th triode Q5, the 8th resistance R 8 and voltage stabilizing didoe D1, the first current-limiting resistance Ra and the second current-limiting resistance Rb, comparator 60, first selector 61 and second selector 62.
Embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter parts and the setting of specific examples are described.Certainly, they are only example, and purpose does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between the various embodiment that discuss of institute and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the present utility model, need to prove, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, can be also the connection of two element internals, can be directly to be connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to following description and accompanying drawing, with these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, specifically disclose some specific implementations in embodiment of the present utility model, represent to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and interior all changes, modification and the equivalent of intension scope that falls into additional claims.
The IGBT drive unit that is used for electromagnetic heating system that proposes according to the utility model embodiment is described with reference to the accompanying drawings.
Fig. 4 is used for the structural representation of the IGBT drive unit of electromagnetic heating system for this.As shown in Figure 4, this IGBT drive unit comprises controller 10, detection module 20, the first switch module 11, second switch module 12 and the 3rd switch module 13.
Wherein, detection module 20 for detection of the voltage at coil panel 21 two ends of electromagnetic heating system to generate the first detection signal VA and the second detection signal VB.Controller 10(namely controls IC) have the first output I/O1 and the second an output I/O2, and controller 10 is connected with detection module 20, controller 10 is exported the first control signal by the first output I/O1, and generates the second control signal and pass through the second output I/O2 output according to the first detection signal VA and the second detection signal VB.
In the present embodiment, as shown in Figure 4, the first switch module 11 is connected with controller 10 respectively with second switch module 12, and the first switch module 11 generates first according to the first control signal and drives signal, namely say, the first switch module 11 is controlled break-make by the first control signal.Second switch module 12 generates second according to the second control signal and drives signal, namely says, second switch module 12 is controlled break-make by the second control signal.And the 3rd switch module 13 is connected with second switch module 12 with the first switch module 11 respectively, and the 3rd switch module 13 drives signal and second according to first and drives signal generation switching signal to control the turn-on and turn-off of IGBT, namely say, the 3rd switch module 13 is by the first control signal and the second control signal co-controlling break-make.
In an embodiment of the present utility model, as shown in Figure 4, above-mentioned IGBT drive unit for electromagnetic heating system also comprises power module 22, power module 22 is connected with IGBT with the coil panel 21 of electromagnetic heating system respectively, and power module is used for providing working power to coil panel 21 and the IGBT of electromagnetic heating system.
Further; in an embodiment of the present utility model, as shown in Figure 5, this IGBT drive unit also comprises anti-jamming protector 14; and anti-jamming protector 14 is connected between IGBT and the 3rd switch module 13, and anti-jamming protector 14 is used for IGBT is carried out anti-interference protection.Particularly; as shown in Figure 5; anti-jamming protector 14 comprises the 8th resistance R 8 and voltage stabilizing didoe D1 parallel with one another; one end of the 8th resistance R 8 and the negative pole end of voltage stabilizing didoe D1 are connected between IGBT and the 3rd switch module 13, and the positive terminal of the other end of the 8th resistance R 8 and voltage stabilizing didoe D1 is ground connection respectively.
In an embodiment of the present utility model, as shown in Figure 5, the first switch module 11 further comprises the first resistance R 1, the first triode Q1, the second resistance R 2, the second triode Q2, the 3rd resistance R 3 and the first capacitor C 1.
Wherein, an end of the first resistance R 1 is connected with the first output I/O1 of controller 10, receives the first control signal, and the base stage of the first triode Q 1 is connected with the other end of the first resistance R 1, the grounded emitter of the first triode Q1.One end of the second resistance R 2 is connected with the other end of the first resistance R 1, the other end ground connection of the second resistance R 2.The base stage of the second triode Q2 is connected with the collector electrode of the first triode Q1, and the collector electrode of the second triode Q2 is as the output of the first switch module 11, the grounded emitter of the second triode Q2.The 3rd resistance R 3 and the first capacitor C 1 are connected in series mutually, and the node between the 3rd resistance R 3 and the first capacitor C 1 is connected with the base stage of the second triode Q2 and the collector electrode of the first triode Q1 respectively, one end of the 3rd resistance R 3 is connected with power supply (for example voltage is the power supply of 20V), an end ground connection of the first capacitor C 1.
In embodiment of the present utility model, as shown in Figure 5, second switch module 12 further comprises the 4th resistance R 4, the 5th resistance R 5 and the 3rd triode Q3.Wherein, an end of the 4th resistance R 4 is connected with the second output I/O2 of controller 10, and an end of the 5th resistance R 5 is connected with the other end of the 4th resistance R 4, and the other end ground connection of the 5th resistance R 5.The base stage of the 3rd triode Q3 is connected with an end of the 5th resistance R 5, the grounded emitter of the 3rd triode Q3, and the collector electrode of the 3rd triode Q3 is as the output of second switch module 12.
As shown in Figure 5, the 3rd switch module 13 further comprises the 6th resistance R 6, the 7th resistance R 7, the 4th triode Q4 and the 5th triode Q5.Wherein, one end of the 6th resistance R 6 is connected with the collector electrode of the second triode Q2 and the collector electrode of the 3rd triode Q3 respectively, one end of the 7th resistance R 7 is connected with the other end of the 6th resistance R 6, and the other end of the 7th resistance R 7 is connected with power supply (for example voltage 20V).The base stage of the 4th triode Q4 is connected with an end of the 7th resistance R 7, and the collector electrode of the 4th triode Q4 is connected with above-mentioned power supply, and the emitter of the 4th triode Q4 is connected with IGBT, namely is connected with the control end of IGBT.The base stage of the 5th triode Q5 is connected with the base stage of the 4th triode Q4, the grounded collector of the 5th triode Q5, and the emitter of the 5th triode Q5 is connected with IGBT, namely is connected with the control end of IGBT.
And in an embodiment of the present utility model, as shown in Figure 5, the 3rd switch module 13 also comprises the first current-limiting resistance Ra and the second current-limiting resistance Rb.The end of the first current-limiting resistance Ra is connected with the emitter of the 4th triode Q4, the other end of the first current-limiting resistance Ra is connected with the emitter of the 5th triode Q5, the end of the second current-limiting resistance Rb is connected with the emitter of the 5th triode Q5 and the other end of the first current-limiting resistance Ra respectively, and the other end of the second current-limiting resistance Rb is connected with the control end of IGBT.Wherein, the first current-limiting resistance Ra and the second current-limiting resistance Rb formation current limliting unit 15.
Wherein, in an embodiment of the present utility model, as shown in Figure 5, controller 10 further comprises comparing unit 16, comparing unit 16 is connected with detection module 20, is used for generating comparison signal to control the second control signal of the second output I/O2 output according to the first detection signal VA and the second detection signal VB.
Particularly, as shown in Figure 6, comparing unit 16 comprises comparator 60, first selector 61 and second selector 62.The second output I/O2 by second selector 62 selection controls 10 is to export the second control signal.
That is to say, the first detection signal VA of detection module 20 outputs and the second detection signal VB process second output I/O2 output the second control signal of backward controller 10 through comparing unit 16.
Therefore, as shown in Figure 5, the IGBT drive unit that is used for electromagnetic heating system that the utility model embodiment proposes in the course of the work, when the first output I/O1 output high level of controller 10, triode Q1 conducting, Q2 cut-off; With the second output I/O2 output low level of Time Controller 10, triode Q3 cut-off, triode Q4 conducting, IGBT is driven opens work.
When the first output I/O1 output low level of controller 10, triode Q1 cut-off, Q2 conducting; With the second output I/O2 output high level of Time Controller 10, triode Q3 conducting, triode Q4 cut-off, triode Q5 conducting, IGBT is turned off.
Thus, in above-mentioned work engineering, opening of IGBT must meet the following conditions: the first output I/O1 output high level of controller 10, with the second output I/O2 output low level of Time Controller 10, this is to belong to the logical “and” relation.
in embodiment of the present utility model, IGBT is controlled simultaneously by two port I/O1 of controller 10 and the control signal of I/O2 output, even the first detection signal VA and the second detection signal VB are interfered, the mistake upset occurs in comparator 60, the of short duration low level A of the second output I/O2 output that causes controller 10, also can change at short notice the output high level, when the first output I/O1 of controller 10 exports high level B, the second output I/O2 of controller 10 has also exported high level, the 3rd switch module 13 can not opened, thereby protection IGBT can not open by mistake logical the damage.Wherein, control signal as shown in Figure 7, when upset occurs in comparator 60, and output low level, produce interrupt requests, after controller 10 is accepted interrupt requests, begin to postpone timing t, and when 0V was arrived in the C of IGBT electrode drop, controller 10 was from the first output I/O1 output high level.
In addition, circuit all adopts the simple electronic component such as resistance, triode, and connection is simple, and circuit performance is stable, also greatly reduces simultaneously cost.
In embodiment of the present utility model, the first switch module 11, second switch module 12 and the 3rd switch module 13 can also be comprised of or integrated device the amplifier device respectively.
The IGBT drive unit that is used for electromagnetic heating system according to the utility model embodiment; when detection module 20 is interfered; produce rub-out signal; when making controller 10 mistake outputs drive the IGBT signal; the rub-out signal that detection module 20 produces can shield the mistake of controlling IGBT and drive; thereby protection IGBT can not open by mistake logical the damage, has improved reliability.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that do not break away from principle of the present utility model and spirit can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is by claims and be equal to and limit.
Claims (9)
1. an IGBT drive unit that is used for electromagnetic heating system, is characterized in that, comprising:
Detection module, described detection module detect the voltage at coil panel two ends of electromagnetic heating system to generate the first detection signal and the second detection signal;
Controller, described controller is connected with described detection module, described controller has the first output and the second output, described controller is exported the first control signal by described the first output, and generates the second control signal and export by described the second output according to described the first detection signal and the second detection signal;
The first switch module and second switch module, described the first switch module is connected with described controller respectively with the second switch module, and described the first switch module and second switch module generate the first driving signal and the second driving signal according to described the first control signal and described the second control signal respectively;
The 3rd switch module, described the 3rd switch module is connected with the second switch module with described the first switch module respectively, and described the 3rd switch module drives signal and described second according to described first and drives signal generation switching signal to control the turn-on and turn-off of IGBT.
2. the IGBT drive unit for electromagnetic heating system as claimed in claim 1, is characterized in that, described controller further comprises:
Comparing unit, described comparing unit is connected with described detection module, and described comparing unit generates comparison signal to control the second control signal of described the second output output according to described the first detection signal and the second detection signal.
3. the IGBT drive unit for electromagnetic heating system as claimed in claim 1, is characterized in that, also comprises:
Power module, described power module are connected with described IGBT with the coil panel of described electromagnetic heating system respectively, and described power module provides working power for coil panel and the described IGBT of described electromagnetic heating system.
4. the IGBT drive unit for electromagnetic heating system as described in claim 1-3 any one, is characterized in that, also comprises:
Anti-jamming protector, described anti-jamming protector are connected between described IGBT and described the 3rd switch module, and described anti-jamming protector carries out anti-interference protection to described IGBT.
5. the IGBT drive unit for electromagnetic heating system as claimed in claim 1, is characterized in that, described the first switch module further comprises:
The first resistance, an end of described the first resistance is connected with the first output of described controller, receives described the first control signal;
The first triode, the base stage of described the first triode is connected with the other end of described the first resistance, the grounded emitter of described the first triode;
The second resistance, an end of described the second resistance is connected with the other end of described the first resistance, the other end ground connection of described the second resistance;
The second triode, the base stage of described the second triode is connected with the collector electrode of described the first triode, and the collector electrode of described the second triode is as the output of described the first switch module, the grounded emitter of described the second triode;
The 3rd resistance and first electric capacity of series connection, node between described the 3rd resistance and described the first electric capacity is connected with the base stage of described the second triode and the collector electrode of described the first triode respectively, one end of described the 3rd resistance is connected with power supply, an end ground connection of described the first electric capacity.
6. the IGBT drive unit for electromagnetic heating system as claimed in claim 5, is characterized in that, described second switch module further comprises:
The 4th resistance, an end of described the 4th resistance is connected with the second output of described controller;
The 5th resistance, an end of described the 5th resistance is connected with the other end of described the 4th resistance, the other end ground connection of described the 5th resistance;
The 3rd triode, the base stage of described the 3rd triode is connected with an end of described the 5th resistance, the grounded emitter of described the 3rd triode, the collector electrode of described the 3rd triode is as the output of described second switch module.
7. the IGBT drive unit for electromagnetic heating system as claimed in claim 6, is characterized in that, described the 3rd switch module further comprises:
The 6th resistance, an end of described the 6th resistance are connected with the collector electrode of described the second triode and the collector electrode of described the 3rd triode respectively;
The 7th resistance, an end of described the 7th resistance is connected with the other end of described the 6th resistance, and the other end of described the 7th resistance is connected with described power supply;
The 4th triode, the base stage of described the 4th triode is connected with an end of described the 7th resistance, and the collector electrode of described the 4th triode is connected with described power supply, and the emitter of described the 4th triode is connected with described IGBT;
The 5th triode, the base stage of described the 5th triode is connected with the base stage of described the 4th triode, the grounded collector of described the 5th triode, the emitter of described the 5th triode is connected with described IGBT.
8. the IGBT drive unit for electromagnetic heating system as claimed in claim 7, is characterized in that, described the 3rd switch module also comprises:
The first current-limiting resistance, an end of described the first current-limiting resistance is connected with the emitter of described the 4th triode, and the other end of described the first current-limiting resistance is connected with the emitter of described the 5th triode;
The second current-limiting resistance, an end of described the second current-limiting resistance are connected with the emitter of described the 5th triode and the other end of the first current-limiting resistance respectively, and the other end of described the second current-limiting resistance is connected with described IGBT.
9. the IGBT drive unit for electromagnetic heating system as claimed in claim 4, is characterized in that, described anti-jamming protector further comprises:
The 8th resistance and voltage stabilizing didoe parallel with one another, one end of described the 8th resistance and the negative pole end of described voltage stabilizing didoe are connected between described IGBT and described the 3rd switch module, and the other end of described the 8th resistance and the positive terminal of described voltage stabilizing didoe be ground connection respectively.
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| CN 201220657462 CN203027519U (en) | 2012-12-03 | 2012-12-03 | IGBT (Insulated Gate Bipolar Transistor) driving device for electromagnetic heating system |
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| CN 201220657462 CN203027519U (en) | 2012-12-03 | 2012-12-03 | IGBT (Insulated Gate Bipolar Transistor) driving device for electromagnetic heating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857083A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | IGBT drive device for electromagnetic heating system |
| CN107306459A (en) * | 2016-04-20 | 2017-10-31 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit |
| CN107404779A (en) * | 2016-05-19 | 2017-11-28 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic Heating cooking system and its heating control apparatus |
| CN107707248A (en) * | 2017-11-01 | 2018-02-16 | 成都声立德克技术有限公司 | Same OR circuit, adjusting method and NOR gate circuit |
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2012
- 2012-12-03 CN CN 201220657462 patent/CN203027519U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857083A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | IGBT drive device for electromagnetic heating system |
| CN107306459A (en) * | 2016-04-20 | 2017-10-31 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit |
| CN107306459B (en) * | 2016-04-20 | 2020-06-30 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and heating control circuit thereof |
| CN107404779A (en) * | 2016-05-19 | 2017-11-28 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic Heating cooking system and its heating control apparatus |
| CN107404779B (en) * | 2016-05-19 | 2020-09-18 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating cooking system and heating control device thereof |
| CN107707248A (en) * | 2017-11-01 | 2018-02-16 | 成都声立德克技术有限公司 | Same OR circuit, adjusting method and NOR gate circuit |
| CN107707248B (en) * | 2017-11-01 | 2024-01-26 | 成都声立德克技术有限公司 | exclusive-OR gate circuit, adjusting method and exclusive-OR gate circuit |
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