CN206004637U - IGBT drive circuit, half-bridge electromagnetic heating circuit and induction cooker - Google Patents
IGBT drive circuit, half-bridge electromagnetic heating circuit and induction cooker Download PDFInfo
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- CN206004637U CN206004637U CN201620986266.2U CN201620986266U CN206004637U CN 206004637 U CN206004637 U CN 206004637U CN 201620986266 U CN201620986266 U CN 201620986266U CN 206004637 U CN206004637 U CN 206004637U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- 230000006698 induction Effects 0.000 title 1
- 238000001914 filtration Methods 0.000 claims description 10
- 238000002955 isolation Methods 0.000 abstract description 7
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Abstract
The utility model provides a drive circuit, half-bridge electromagnetic heating circuit and electromagnetism stove of IGBT. The drive circuit of the IGBT includes: a first driving unit (10), a pulse isolation unit (20) and a charging unit (30); the charging unit (30) is used for providing a stable voltage difference for the first driving unit (10) and the pulse isolation unit (20); the pulse isolation unit (20) is used for sending a pulse signal to the first driving unit (10) when a pulse input end of the pulse isolation unit (20) receives the pulse signal. The utility model discloses an increase pulse isolation unit and charging unit and can realize the drive of upper bridge arm IGBT, simple structure, the area is less, and the cost is lower.
Description
Technical field
The utility model is related to circuit structure technical field, and more particularly to a kind of drive circuit of IGBT, half-bridge electromagnetism add
Heater circuit and electromagnetic oven.
Background technology
Electromagnetic oven, boiler are common electromagnetic heating apparatus, and the switching device in electromagnetic heating circuit is generally from absolutely
Edge grid bipolar transistor (Insulated Gate Bipolar Transistor, abbreviation IGBT) module, is cost-effective
IGBT module generally selects semi-bridge type, is turned on by controlling the IGBT of upper and lower bridge arm in turn, realizes electromagnetic heating circuit continuous, steady
Fixed heating function.
As the IGBT in upper and lower two brachium pontis is connected in series, the current collection of the actual and lower brachium pontis of the earth terminal of the IGBT of upper brachium pontis
Pole connects, and there is potential difference, therefore in upper and lower two brachium pontis and the earth terminal of the IGBT drive circuit for driving upper brachium pontis between
IGBT when being driven, isolation drive need to be carried out.In existing IGBT drive circuit, generally driven using isolating transformer
The IGBT of lower brachium pontis.But, when carrying out IGBT driving using isolating transformer, as volume of transformer is larger, therefore it is unfavorable for
The miniaturization of firing equipment and integrated, while the power consumption of isolating transformer is also larger.
Utility model content
For at least one problem for solving to mention in background technology, the utility model provides a kind of driving electricity of IGBT
Road, half-bridge electromagnetic heating circuit and electromagnetic oven, using less electronic devices and components, with better simply structure.
On the one hand the utility model provides a kind of drive circuit of IGBT, is applied to half-bridge electromagnetic heating circuit, including：The
One driver element, impulsive quarantine unit and charhing unit；Wherein,
The positive voltage output end of charhing unit positive voltage input and the first driver element respectively with impulsive quarantine unit
The connection of positive voltage input, the negative voltage output end of charhing unit respectively with the negative voltage input of impulsive quarantine unit and the
The negative voltage input connection of one driver element, charhing unit are used for being the first driver element and impulsive quarantine unit, provide steady
Fixed voltage difference；
The output end of the first driver element is connected with the grid of the upper brachium pontis IGBT in half-bridge electromagnetic heating circuit, and first drives
The negative voltage input of moving cell is connected with the emitter stage of upper brachium pontis IGBT, the pulse input end of the first driver element and pulse every
Output end from unit connects；
First driver element is used for when the pulse input end of the first driver element receives pulse signal, upwards brachium pontis
IGBT sends drive signal；
Impulsive quarantine unit is used for, when the pulse input end of impulsive quarantine unit receives pulse signal, driving to first
Unit sends pulse signal.
By being isolated pulse signal generative circuit with the first driver element using impulsive quarantine unit, while increase charging
Unit, is that the first driver element and impulsive quarantine unit provide stable voltage difference, and the high-low voltage in voltage difference is with upper
The change of the reference ground voltage of brachium pontis IGBT and change, it is achieved thereby that the driving of upper brachium pontis IGBT.Therefore, the utility model leads to
The driving for increasing that impulsive quarantine unit and charhing unit can achieve upper brachium pontis IGBT is crossed, simple structure, area are less, and cost
Relatively low.
The drive circuit of IGBT as above, charhing unit include：Diode, resistance and electric capacity；
The positive pole of diode is connected with dc source, and the negative pole of diode is connected with one end of resistance；
One end of electric capacity other end respectively with resistance, the positive voltage input of impulsive quarantine unit and the first driver element
The connection of positive voltage input, the other end of electric capacity negative voltage input and the first driver element respectively with impulsive quarantine unit
Negative voltage input connection.
The drive circuit of IGBT as above, impulsive quarantine unit are driving photoelectric coupled circuit.
The drive circuit of IGBT as above, the first driver element are push-pull driver circuit.
On the other hand the utility model provides a kind of half-bridge electromagnetic heating circuit, including the driving electricity of IGBT as above
Road, the second driver element, lower brachium pontis IGBT, the first resonant element, the second resonant element and rectification filtering unit；Wherein,
Mains supply is connected with upper brachium pontis IGBT, lower brachium pontis IGBT by rectification filtering unit, forms current supply circuit, upper bridge
The emitter stage of arm IGBT is connected with the colelctor electrode of lower brachium pontis IGBT, the grounded emitter of lower brachium pontis IGBT；
First resonant element is in parallel with upper brachium pontis IGBT, and the second resonant element is in parallel with lower brachium pontis IGBT；
The drive circuit of IGBT is connected with the grid of upper brachium pontis IGBT, and brachium pontis IGBT provides drive signal upwards；
The positive voltage input of the second driver element is connected with dc source, the negative voltage input of the second driver element with
The emitter stage connection of lower brachium pontis IGBT, the output end of the second driver element are connected with the grid of lower brachium pontis IGBT, and second drives list
Unit is used for when the pulse input end of the second driver element receives pulse signal, and downward brachium pontis IGBT sends drive signal.
Half-bridge electromagnetic heating circuit as above, the first resonant element include electric capacity, and the second resonant element includes electric capacity.
The utility model another further aspect provides a kind of electromagnetic oven, including half-bridge electromagnetic heating circuit as above and control
Unit；
Wherein, control unit is connected with the input of impulsive quarantine unit and the pulse input end of the second driver element respectively
Connect；
Control unit is used for input in turn to impulsive quarantine unit and the pulse input end of the second driver element is provided
Pulse signal.
Construction of the present utility model and its other utility model purposes and beneficial effect will be by combining accompanying drawing
Description of preferred embodiments and become apparent from understandable.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the utility model embodiment, below will be to wanting needed for embodiment description
The accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present utility model,
For those of ordinary skill in the art, without having to pay creative labor, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
The structural representation of the drive circuit embodiment one of the IGBT that Fig. 1 is provided for the utility model；
The structural representation of the drive circuit embodiment two of the IGBT that Fig. 2 is provided for the utility model；
The structural representation of the half-bridge electromagnetic heating circuit embodiment one that Fig. 3 is provided for the utility model；
The structural representation of the half-bridge electromagnetic heating circuit embodiment two that Fig. 4 is provided for the utility model；
The structural representation of the electromagnetic oven embodiment one that Fig. 5 is provided for the utility model.
Reference：
10 first driver elements；20 impulsive quarantine units；30 charhing units；
Brachium pontis IGBT on 40；50 second driver elements；60 times brachium pontis IGBT；
70 first resonant elements；80 second resonant elements；90 rectification filtering units；
100 control units；31 diodes；32 resistance；
33 electric capacity；71 electric capacity；81 electric capacity.
Specific embodiment
Purpose, technical scheme and advantage for making the utility model embodiment is clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described to the technical scheme in the utility model embodiment, it is clear that retouched
The embodiment that states is a part of embodiment of the utility model, rather than whole embodiments.Based on the enforcement in the utility model
Example, the every other embodiment obtained under the premise of creative work is not made by those of ordinary skill in the art, belong to
The scope of the utility model protection.
On the one hand the utility model provides a kind of drive circuit of IGBT, the drive of the IGBT that Fig. 1 is provided for the utility model
The structural representation of dynamic circuit embodiments one.As shown in figure 1, being applied to the drive circuit bag of the IGBT of half-bridge electromagnetic heating circuit
Include：First driver element 10, impulsive quarantine unit 20 and charhing unit 30；Wherein,
The positive voltage output end of charhing unit 30 is driven with the positive voltage input and first of impulsive quarantine unit 20 respectively
The positive voltage input connection of unit 10, the negative voltage output end of charhing unit 30 negative voltage respectively with impulsive quarantine unit 20
The negative voltage input connection of input and the first driver element 10, charhing unit 30 are used for as the first driver element 10 and pulse
Isolated location 20, provides stable voltage difference；
The output end of the first driver element 10 is connected with the grid of the upper brachium pontis IGBT40 in half-bridge electromagnetic heating circuit, the
The negative voltage input of one driver element 10 is connected with the emitter stage of upper brachium pontis IGBT50, the pulse input of the first driver element 10
End is connected with the output end of impulsive quarantine unit 20；
First driver element 10 is used for when the pulse input end of the first driver element 10 receives pulse signal, upwards bridge
Arm IGBT50 sends drive signal；
Impulsive quarantine unit 20 is used for when the pulse input end of impulsive quarantine unit 20 receives pulse signal, to first
Driver element 10 sends pulse signal.
Specifically, in half-bridge electromagnetic heating circuit, including upper and lower two brachium pontis, two brachium pontis were turned in the different moment,
So that the different piece of resonance circuit is worked respectively, heating is realized.As upper brachium pontis IGBT, lower brachium pontis IGBT connect, upper brachium pontis
The earth terminal (i.e. emitter stage) of IGBT does not have actual ground connection, but is connected with the colelctor electrode of lower brachium pontis IGBT, with actual ground
There is potential difference in current potential.Current potential at the emitter stage of upper brachium pontis IGBT is the ground reference for whole upper brachium pontis IGBT.
As upper brachium pontis IGBT can be turned on, the voltage of the grid and transmitting interpolar that are applied to brachium pontis IGBT is depended on to deposit
In certain voltage difference, therefore, when the current potential of the ground reference of upper brachium pontis IGBT is raised, the grid of upper brachium pontis IGBT, send out
The current potential of emitter-base bandgap grading also synchronously should be raised.
Exemplary, the output end of the first driver element 10 is connected with the pulse input end of upper brachium pontis IGBT40, for
Upper brachium pontis IGBT40 provides driving, and the low-voltage input of the first driver element 10 is connected with the emitter stage of upper brachium pontis IGBT40,
So that the ground reference of the first driver element 10 is consistent with the ground reference of upper brachium pontis IGBT40, is now applied to
The voltage of the positive voltage input of one driver element 10 also should be raised with the rising of ground reference.
The positive voltage output end of charhing unit 30 is driven with the positive voltage input and first of impulsive quarantine unit 20 respectively
The positive voltage input connection of unit 10, the negative voltage output end of charhing unit 30 negative voltage respectively with impulsive quarantine unit 20
The negative voltage input connection of input and the first driver element 10, so that charhing unit 30 is to 10 He of the first driver element
Impulsive quarantine unit 20, provides stable voltage difference.
Exemplary, charhing unit 30 can be using the circuit structure arbitrarily with charge function, such as electric capacity etc..
When charhing unit 30 is required to the voltage difference satisfaction that the first driver element 10 is provided, charhing unit 30 is driven to first
The voltage of the negative voltage input of moving cell 10 and positive voltage input should also meet requirement.By by the low electricity of charhing unit 30
Pressure output end is connected with the low-voltage input of the first driver element 10, upper brachium pontis IGBT40, so that charhing unit 30
The current potential (i.e. the reference ground voltage of charhing unit 30) at low-voltage output end, with the liter of the reference ground voltage of upper brachium pontis IGBT40
High and raise.
As charhing unit 30 is with charge function, stable voltage difference can be provided, therefore, when the reference of charhing unit 30
The current potential of ground voltage is raised, and the current potential of the high-voltage output terminal of charhing unit 30 is raised simultaneously, so that charhing unit 30
High-voltage output terminal provides satisfactory high voltage to the first driver element 10 and impulsive quarantine unit 20.
The output end of impulsive quarantine unit 20 is connected with the pulse input end of the first driver element 10, when impulsive quarantine unit
When 20 input receives pulse signal, as the high voltage that is applied on impulsive quarantine unit 20 and low-voltage are rising
Voltage afterwards, therefore, the pulse that impulsive quarantine unit 20 is generated is also the pulse after voltage rising, meets the first driver element 10
Pulse input end needed for voltage.
Impulsive quarantine unit 20, can be by the of the pulse signal generative circuit of ground connection and real ground connection with isolation features
One driver element 10, charhing unit 30 are kept apart, it is to avoid the first driver element 10, the rising of the reference ground voltage of charhing unit 30
And cause the voltage of pulse signal generative circuit to be raised, cause pulse signal generative circuit to damage.
Exemplary, impulsive quarantine unit 20 can adopt any isolated form circuit structure, for example, can drive for optocoupler type
Dynamic circuit, or sound control type drive circuit, the utility model are not limited to this.
The utility model is by being isolated pulse signal generative circuit with the first driver element using impulsive quarantine unit, same
Shi Zengjia charhing unit, is that the first driver element and impulsive quarantine unit provide stable voltage difference, and high and low in voltage difference
Voltage changes with the change of the reference ground voltage of upper brachium pontis IGBT, it is achieved thereby that the driving of upper brachium pontis IGBT.Therefore, originally
Utility model can achieve the driving of upper brachium pontis IGBT, simple structure, area by increasing impulsive quarantine unit and charhing unit
Less, and cost is relatively low.
Further, on the basis of embodiment illustrated in fig. 1, the circuit structure to charhing unit 30 is described in detail.
The structural representation of the drive circuit embodiment two of the IGBT that Fig. 2 is provided for the utility model, as shown in Fig. 2 fill
Electric unit 30 includes：Diode 31, resistance 32 and electric capacity 33；
The positive pole of diode 31 is connected with dc source, and the negative pole of diode 31 is connected with one end of resistance 32；
One end of electric capacity 33 other end respectively with resistance 32, the positive voltage input of impulsive quarantine unit 20 and first drive
The positive voltage input connection of moving cell 10, the other end of electric capacity 33 respectively with the negative voltage input of impulsive quarantine unit 20 and
The negative voltage input connection of the first driver element 10.
Specifically, it is contemplated that electric capacity have storage electric energy function, electric capacity be located loop there is power supply when, power supply to
Electric capacity charges, and when the loop that electric capacity is located does not have power supply, electric capacity is powered to other devices.
Exemplary, as shown in Fig. 2 charging circuit 30 includes diode 31, resistance 32 and electric capacity 33, dc source, two
Pole pipe 31, resistance 32 and electric capacity 33 are sequentially connected in series.Wherein, the positive pole of diode is connected with dc source, electric capacity also with upper brachium pontis
The emitter stage connection of IGBT40.
Therefore, when brachium pontis IGBT conducting instantly, upper brachium pontis IGBT40 are turned off, dc source, diode 31, resistance 32, electricity
Hold 33 and lower brachium pontis IGBT and current supply circuit is formed, the voltage of dc source is higher than the voltage of the earth terminal of lower brachium pontis IGBT, therefore,
Diode 31 is turned on, and dc source is charged to electric capacity 33 by resistance 32 so that the voltage at 33 two ends of electric capacity and dc source phase
With.Exemplary, the magnitude of voltage of dc source can be 5 volts, 18 volts etc..The magnitude of voltage more than the first driver element 10 just,
Voltage difference needed for negative voltage input.
When the reference ground voltage of the emitter stage of upper brachium pontis IGBT40 is raised, the voltage at 33 two ends of electric capacity is raised simultaneously, but
Be 33 two ends of electric capacity voltage difference be maintained as identical with dc source.
Instantly when brachium pontis IGBT is turned off, upper brachium pontis IGBT40 is turned on, dc source, diode 31, resistance 32,33 and of electric capacity
The current supply circuit that lower brachium pontis IGBT is formed disconnects, and dc source cannot be charged to electric capacity 33, now, electric capacity 33 be connected in parallel on pulse every
From unit 20 and the two ends of the first driver element 10, discharge loop is defined, electric capacity 33 can be to impulsive quarantine unit 20 and first
Driver element 10 provides stable voltage difference.
Optionally, on the basis of any of the above-described embodiment, the first driver element 10 can adopt push-pull driver circuit.
On the other hand the utility model also provides a kind of half-bridge electromagnetic heating circuit, Fig. 3 be the utility model provide partly
The structural representation of bridge electromagnetic heating circuit embodiment one.As shown in figure 3, the driving electricity including IGBT as shown in Figure 1 or 2
Road, the second driver element 50, lower brachium pontis IGBT60, the first resonant element 70, the second resonant element 80 and rectification filtering unit 90；
Wherein,
Mains supply is connected with upper brachium pontis IGBT40, lower brachium pontis IGBT60 by rectification filtering unit 90, is formed and is powered back
Road, the emitter stage of upper brachium pontis IGBT40 are connected with the colelctor electrode of lower brachium pontis IGBT60, the grounded emitter of lower brachium pontis IGBT60；
First resonant element 70 is in parallel with upper brachium pontis IGBT40, and the second resonant element 80 is in parallel with lower brachium pontis IGBT60；
The drive circuit of IGBT is connected with the grid of upper brachium pontis IGBT40, and brachium pontis IGBT40 provides drive signal upwards；
The positive voltage input of the second driver element 50 is connected with dc source, the negative voltage input of the second driver element 50
End is connected with the emitter stage of lower brachium pontis IGBT60, and the output end of the second driver element 50 is connected with the grid of lower brachium pontis IGBT60,
Second driver element 50 is used for when the pulse input end of the second driver element 50 receives pulse signal, downward brachium pontis IGBT60
Send drive signal.
Specifically, as shown in figure 3, half-bridge electromagnetic heating circuit includes the first resonant element 70 of parallel connection and upper brachium pontis
IGBT40, and the second resonant element 80 and the lower brachium pontis IGBT60 of parallel connection, two parallel branch series connection.Mains supply is by whole
Stream filter unit 90 is converted to dc source, and dc source is powered to two parallel branches of series connection.
When upper brachium pontis IGBT40 conducting, lower brachium pontis IGBT60 are turned off, mains supply after rectification, upper brachium pontis IGBT40,
Second resonant element 80 is connected, and forms current supply circuit, and the heating of the second resonant element 80 is operated.When upper brachium pontis IGBT40 is closed
When disconnected, lower brachium pontis IGBT60 is turned on, the mains supply after rectification, the first resonant element 70, lower brachium pontis IGBT60 series connection, formed and supply
Electrical circuit, the heating of the first resonant element 70 are operated.
As the emitter stage of lower brachium pontis IGBT60 is directly grounded, which refers to ground voltage and provides the pulse signal of pulse signal
The reference ground voltage of generative circuit is identical, because the positive voltage input of the second driver element 50 can be connected with dc source, the
The negative voltage input of two driver elements 50 is connected with the emitter stage of lower brachium pontis IGBT60, that is, be grounded.Second driver element 50
Output end is connected with the grid of lower brachium pontis IGBT60, when the pulse input end of the second driver element 50 receives pulse signal,
Brachium pontis IGBT60 sends drive signal downwards.
Exemplary, rectification filtering unit 90 can be made up of rectifier bridge and filtering device.Rectification filtering unit 90 is used for
Realize for AC power being converted into dc source, and filtering interference signals, protection circuit.Exemplary, mains supply is usually
220 volts of alternating voltage.
Optionally, on the basis of embodiment illustrated in fig. 3, the half-bridge electromagnetic heating circuit that Fig. 4 is provided for the utility model
The structural representation of embodiment two.As shown in figure 4, the first resonant element 70 includes electric capacity 71, the second resonant element 80 includes electricity
Hold 81.
The utility model another further aspect also provides a kind of electromagnetic oven, the electromagnetic oven embodiment that Fig. 5 is provided for the utility model
One structural representation.As shown in figure 5, electromagnetic oven includes half-bridge electromagnetic heating circuit and the control unit 100 as Fig. 3 or Fig. 4；
Control unit 100 is connected with the input of impulsive quarantine unit 20 and the pulse input end of the second driver element 50 respectively
Connect；
Control unit 100 is used in turn to the input of impulsive quarantine unit 20 and the pulse input of the second driver element 50
End provides pulse signal.
Exemplary, the upper brachium pontis IGBT40 and lower brachium pontis IGBT60 of the control of control unit 100 is turned in turn, specifically, first
First control lower brachium pontis IGBT60 conducting, then control upper brachium pontis IGBT40 to turn on.
Specifically, control unit 100 respectively with the input of impulsive quarantine unit 20 and the pulse of the second driver element 50
Input connects, and the pulse input end of the input to impulsive quarantine unit 20 and the second driver element 50 provides pulse letter in turn
Number.
When control unit 100 sends pulse signal to the second driver element 50, the second driver element 50 drives lower brachium pontis
IGBT60 is turned on, and now, upper brachium pontis 40 disconnects, and the mains supply after rectification flows through the first resonant element 70 and lower brachium pontis
IGBT60, and charhing unit 30 is grounded by lower brachium pontis 60, forms charge circuit, and charhing unit 30 is started to charge up.
When control unit 100 sends pulse signal to impulsive quarantine unit 20, lower brachium pontis IGBT60 disconnects, charhing unit 30
Charge circuit disconnect, charhing unit 30 provides stable voltage difference, arteries and veins to impulsive quarantine unit 20 and the first driver element 10
Rush isolated location 20 pulse signal, the first driver element is provided according to the voltage that charhing unit 30 is provided to the first driver element 10
10 according to pulse signal brachium pontis IGBT40 offer driving upwards, brachium pontis IGBT40 conducting in driving, and now, the civil power after rectification is electric
Source stream is through upper brachium pontis IGBT40 and the second resonant element 80.
Specifically, control unit 100 controls the time that upper brachium pontis IGBT40 and lower brachium pontis IGBT60 is turned in turn concrete root
The ability of stable voltage difference is kept to determine according to charhing unit 30.
Finally it should be noted that：Various embodiments above is only in order to illustrating the technical solution of the utility model, rather than which is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：Which still can be modified to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of each embodiment technical scheme of type.
Claims (7)
1. a kind of drive circuit of IGBT, is applied to half-bridge electromagnetic heating circuit, it is characterised in that include：First driver element
(10), impulsive quarantine unit (20) and charhing unit (30)；Wherein,
The positive voltage output end of charhing unit (30) respectively with the positive voltage input of impulsive quarantine unit (20) and
The positive voltage input connection of the first driver element (10), the negative voltage output end of charhing unit (30) respectively with institute
The negative voltage input of impulsive quarantine unit (20) and the negative voltage input connection of first driver element (10) is stated, described
Charhing unit (30) provides stable voltage for being the first driver element (10) and the impulsive quarantine unit (20)
Difference；
The grid of upper brachium pontis IGBT (40) in the output end of the first driver element (10) and the half-bridge electromagnetic heating circuit
Pole connects, and the negative voltage input of the first driver element (10) is connected with the emitter stage of upper brachium pontis IGBT (50), institute
The pulse input end for stating the first driver element (10) is connected with the output end of impulsive quarantine unit (20)；
Described first driver element (10) are used for the pulse input end in the first driver element (10) and receive pulse signal
When, drive signal is sent to described upper brachium pontis IGBT (50)；
Described impulsive quarantine unit (20) are used for the pulse input end in impulsive quarantine unit (20) and receive pulse signal
When, pulse signal is sent to described first driver element (10).
2. drive circuit according to claim 1, it is characterised in that charhing unit (30) include：Diode (31),
Resistance (32) and electric capacity (33)；
The positive pole of diode (31) is connected with dc source, the negative pole of diode (31) and the one of the resistance (32)
End connection；
The one end of electric capacity (33) other end respectively with the resistance (32), the positive voltage of the impulsive quarantine unit (20)
The positive voltage input connection of input and first driver element (10), the other end of electric capacity (33) respectively with described
The negative voltage input connection of the negative voltage input of impulsive quarantine unit (20) and first driver element (10).
3. drive circuit according to claim 1 and 2, it is characterised in that described impulsive quarantine unit (20) are driving
Photoelectric coupled circuit.
4. drive circuit according to claim 1 and 2, it is characterised in that described first driver element (10) are for recommending drive
Dynamic circuit.
5. a kind of half-bridge electromagnetic heating circuit, it is characterised in that include the drive of the IGBT as described in any one of Claims 1-4
Dynamic circuit, the second driver element (50), lower brachium pontis IGBT (60), the first resonant element (70), the second resonant element (80) and whole
Stream filter unit (90)；Wherein,
Mains supply is connected with upper brachium pontis IGBT (40), described lower brachium pontis IGBT (60) by rectification filtering unit (90)
Connect, current supply circuit is formed, the emitter stage of upper brachium pontis IGBT (40) is connected with the colelctor electrode of lower brachium pontis IGBT (60), institute
State the grounded emitter of lower brachium pontis IGBT (60)；
First resonant element (70) are in parallel with upper brachium pontis IGBT (40), the second resonant element (80) with described under
Brachium pontis IGBT (60) is in parallel；
The drive circuit of the IGBT is connected with the grid of upper brachium pontis IGBT (40), is provided to described upper brachium pontis IGBT (40)
Drive signal；
The positive voltage input of the second driver element (50) is connected with dc source, the second driver element (50) negative
Voltage input end is connected with the emitter stage of lower brachium pontis IGBT (60), the output end of the second driver element (50) with described
The grid connection of lower brachium pontis IGBT (60), described second driver element (50) are used for the pulse in the second driver element (50)
When input receives pulse signal, drive signal is sent to described lower brachium pontis IGBT (60).
6. half-bridge electromagnetic heating circuit according to claim 5, it is characterised in that the first resonant element (70) include
Electric capacity (71), described second resonant element (80) include electric capacity (81).
7. a kind of electromagnetic oven, it is characterised in that include half-bridge electromagnetic heating circuit as described in claim 5 or 6 and control single
First (100)；
Wherein, described control unit (100) drives single respectively with the input of impulsive quarantine unit (20) and described second
The pulse input end connection of first (50)；
Described control unit (100) is used for input and second driver element in turn to impulsive quarantine unit (20)
(50) pulse input end provides pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620986266.2U CN206004637U (en) | 2016-08-30 | 2016-08-30 | IGBT drive circuit, half-bridge electromagnetic heating circuit and induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620986266.2U CN206004637U (en) | 2016-08-30 | 2016-08-30 | IGBT drive circuit, half-bridge electromagnetic heating circuit and induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206004637U true CN206004637U (en) | 2017-03-08 |
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ID=58194731
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620986266.2U Active CN206004637U (en) | 2016-08-30 | 2016-08-30 | IGBT drive circuit, half-bridge electromagnetic heating circuit and induction cooker |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027207A (en) * | 2017-05-25 | 2017-08-08 | 浙江绍兴苏泊尔生活电器有限公司 | IGBT protection circuit and electromagnetism stove |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027207A (en) * | 2017-05-25 | 2017-08-08 | 浙江绍兴苏泊尔生活电器有限公司 | IGBT protection circuit and electromagnetism stove |
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