CN109494970A - IGBT (insulated Gate Bipolar transistor) driving circuit, control method thereof and converter - Google Patents
IGBT (insulated Gate Bipolar transistor) driving circuit, control method thereof and converter Download PDFInfo
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- CN109494970A CN109494970A CN201811610318.6A CN201811610318A CN109494970A CN 109494970 A CN109494970 A CN 109494970A CN 201811610318 A CN201811610318 A CN 201811610318A CN 109494970 A CN109494970 A CN 109494970A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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Abstract
The invention discloses an IGBT drive circuit, a control method thereof and a converter, wherein the IGBT drive circuit comprises: the driving module is used for generating a driving signal for driving the IGBT to act; the push-pull module is connected between the driving module and the IGBT and used for amplifying the power of the driving signal and outputting the driving signal after power amplification to the gate pole of the IGBT; the overvoltage feedback module is connected between the gate pole of the IGBT and the push-pull module and is used for generating feedback action when the IGBT is in overvoltage shutdown; and the detection module is connected between the overvoltage feedback module and the driving module and used for generating a detection signal according to the feedback action of the overvoltage feedback module and sending the detection signal to the driving module, and the driving module adjusts the driving signal according to the detection signal so as to adjust the on-off rate of the IGBT. According to the IGBT driving circuit provided by the embodiment of the invention, the problems that the overvoltage breakdown of the IGBT and the overvoltage feedback module are easy to lose efficacy due to continuous action are solved.
Description
Technical field
The present invention relates to electron electric power technical fields, and in particular to a kind of IGBT drive circuit and its control method, unsteady flow
Device.
Background technique
Insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) is wind-powered electricity generation unsteady flow
The core power device of device, for realizing wind power generating set output AC energy to power network current electric energy conversion.Wind-powered electricity generation
The design of current transformator power module mainly serves for ensuring IGBT device work under the working voltage of safety and temperature, IGBT device
The safe and reliable operation of part is mainly from the two dimension designs of electrical characteristics and thermal characteristics.
By in wind electric converter IGBT failure analysis discovery, about 30% power module fail the reason of be electrical characteristics
In IGBT electrical overloads (Electrical Over Stress, EOS) breakdown.
Since copper bar, IGBT terminal are inherently present stray inductance in power module, IGBT device carves collection when off and penetrates grade
It will appear due to voltage spikes, due to voltage spikes will not be very high under normal operation.In wind electric converter operating condition, exist
A lot of reasons leads to that the DC bus-bar voltage of current transformer is excessively high, operating condition of output current overload, and IGBT is in high DC bus
Under voltage, big output electric current operating condition, the shutdown peak voltage of IGBT can be increased, lead to IGBT because collection to penetrate step voltage excessively high
And puncture.
The driving circuit of IGBT mainly penetrates step voltage clamper side by IGBT collection in terms of IGBT turns off over-voltage suppression at present
Formula carries out.Ideal clamp circuit only acts under special operation condition, while after most operating condition active clamp circuit execution movements,
Failure can't be quoted, converter system, which continues to run, passes through such operating condition to trouble-free.
The clamp circuit of the prior art, in above-mentioned special operation condition, clamp circuit perseveration, this point and clamp circuit
Original design intention be it is contradictory, the risk of clamp circuit device fault can be brought in this way.Clamp circuit is in special work in order to prevent
Perseveration under condition, it will usually improve clamp voltage value, but the peak voltage that will lead to real work is excessively high, can bring IGBT
The risk of over-voltage breakdown.
Summary of the invention
The present invention provides a kind of IGBT drive circuit and its control methods, current transformer, further extend the shutdown of IGBT
Duration is to solve the problem of the over-voltage breakdown of IGBT while solve over-voltage feedback module since perseveration is easy failure.
On the one hand, the present invention provides a kind of IGBT drive circuits comprising: drive module, for generating driving IGBT
The driving signal of movement；Module is recommended, is connected between drive module and IGBT, is used for driving signal power amplification, and will
Driving signal after power amplification is exported to the gate pole of IGBT；Over-voltage feedback module is connected to the collector of IGBT and recommends mould
Between block, for generating feedback action when IGBT turns off over-voltage；And detection module, it is connected to over-voltage feedback module and driving
Between module, send for generating detection signal according to the feedback action of over-voltage feedback module to drive module, drive module according to
Signal Regulation driving signal is detected to adjust the on-off rate of IGBT.
According to an aspect of an embodiment of the present invention, driving signal includes the first cut-off signals and the second cut-off signals；It drives
Dynamic model block includes the first output end and second output terminal；First output end of drive module and recommending connects useful between module
In the first breaking circuit for transmitting the first cut-off signals, the second output terminal of drive module and recommends to be connected between module and be used for
The second breaking circuit of the second cut-off signals is transmitted, wherein the resistance value of the first breaking circuit is greater than the resistance of the second breaking circuit
Value, so that recommending module receives the movement duration of the first cut-off signals generation movement greater than reception the second cut-off signals generation movement
Movement duration；Recommending module includes that polarity is different and recommend the first of connection and recommend triode, first recommend triode, and first
Cut-off signals, the second cut-off signals control first recommended in module respectively and recommend triode with different movement duration conductings.
According to an aspect of an embodiment of the present invention, detection module includes: detection transistor, and the base stage for detecting triode connects
The feedback end of pressure feedback module is taken over, the collector for detecting triode connects predetermined voltage by reset circuit as signal end
Source, signal end are also connected with the input terminal of drive module；Over-voltage feedback module generation movement is so that detection transistor is connected and is believing
Number end generate first detection signal when, drive module according to first detection signal generate the first cut-off signals；Detection transistor is closed
Break so that reset circuit is when signal end generates the second detection signal, drive module generates second according to the second detection signal and turns off
Signal.
According to an aspect of an embodiment of the present invention, the emitter ground connection of detection transistor, reset circuit is pull-up resistor,
First detection signal is that low level detects signal, and the second detection signal is that high level detects signal.
According to an aspect of an embodiment of the present invention, driving signal further includes Continuity signal, and drive module further includes third
Output end, third output end and recommends and is connected with the turning circuit for being used for transmission Continuity signal between module.
According to an aspect of an embodiment of the present invention, over-voltage feedback module includes the Transient Suppression Diode of multiple concatenations,
Feedback end of the anode of over-voltage feedback module as over-voltage feedback module, the cathode of over-voltage feedback module is as over-voltage feedback module
The first test side, the first test side connect IGBT collector.
According to an aspect of an embodiment of the present invention, the feedback end of over-voltage feedback module is also connected with the gate pole of IGBT.
On the other hand, the present invention provides a kind of control method of IGBT drive circuit, the IGBT applied to any of the above-described
Driving circuit, the control method of the IGBT drive circuit include: to detect the movement of over-voltage feedback module；Detecting over-voltage feedback
Module occurs to obtain first detection signal when feedback action；Enter the first shutdown mode according to first detection signal, is closed first
Disconnected mode, module execution in the first duration is recommended in control, so that IGBT is turned off in the first duration；After the first duration
The second shutdown mode is switched to, in the second shutdown mode, module execution in the second duration is recommended in control, so that IGBT exists
Shutdown in second duration, wherein the first duration is greater than the second duration；Carry out detection over-voltage feedback module again after the first duration
Movement the step of, and the first shutdown mode is entered according to first detection signal, until detect that over-voltage feedback module does not occur
Feedback action is to obtain the second detection signal；Enter the second shutdown mode according to the second detection signal.
According to an aspect of an embodiment of the present invention, control method further include: the first detection signal of acquisition is remembered
Record generates fault message and is sent out when persistently detection obtains first detection signal in scheduled duration.
In another aspect, the present invention provides a kind of current transformer comprising the IGBT drive circuit of any of the above-described.
The IGBT drive circuit provided according to embodiments of the present invention increases detection module to provide detection letter to drive module
Number, drive module learns that the operating condition of IGBT becomes from nominal situation the special operation condition of overvoltage according to detection signal, to adjust
Driving signal to adjust the on-off rate of IGBT, asked with the over-voltage breakdown for solving IGBT by the shutdown duration for further extending IGBT
Topic reduces the action frequency of over-voltage feedback module in the duration of special operation condition, solves over-voltage feedback module due to perseveration
The problem of being easy failure.
The control method of the IGBT drive circuit provided according to embodiments of the present invention, when the operating condition of IGBT becomes from nominal situation
For overvoltage special operation condition when, the shutdown of IGBT enters the first shutdown mode, wherein in the first shutdown mode IGBT shutdown
Duration be greater than nominal situation when the second shutdown mode in IGBT shutdown duration, by the shutdown duration solution for further extending IGBT
It has determined the over-voltage breakdown problem of IGBT.In addition, after the first duration, the step of being detected again and according to first detection signal into
Enter the first shutdown mode, until special operation condition is passed through, so that over-voltage feedback module only acts limited in the duration of special operation condition
It is secondary, rather than perseveration, over-voltage feedback module is reduced since perseveration is easy the risk of failure.
A kind of current transformer according to an embodiment of the present invention, solve the problems, such as the over-voltage breakdown of IGBT with improve IGBT operation can
By property, solve the problems, such as that over-voltage feedback module is easy failure due to perseveration to improve IGBT drive circuit and current transformer fortune
Capable reliability.When current transformer is applied in wind power generating set, it is possible to reduce the power generation loss of wind power generating set.
Detailed description of the invention
By reading detailed description of non-limiting embodiments referring to the drawings, other feature of the invention,
Objects and advantages will become more apparent upon, wherein the same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 shows the structural block diagram of IGBT drive circuit according to an embodiment of the present invention；
Fig. 2 shows the circuit structure diagrams of IGBT drive circuit according to an embodiment of the present invention；
Fig. 3 shows the flow chart of the control method of IGBT drive circuit according to an embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, below in conjunction with drawings and the specific embodiments, the present invention is carried out further detailed
Description.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting this hair
It is bright.To those skilled in the art, the present invention can be in the case where not needing some details in these details
Implement.The description of embodiment is preferably managed just for the sake of being provided by showing example of the invention of the invention below
Solution.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
Fig. 1 shows the structural block diagram of IGBT drive circuit according to an embodiment of the present invention, which includes driving
Dynamic model block 110 recommends module 120, over-voltage feedback module 130 and detection module 140.Drive module 110 is for generating driving
The driving signal that IGBT 200 is acted.It recommends module 120 to be connected between drive module and IGBT 200, for driving signal
Power amplification, and the driving signal after power amplification is exported to the gate pole of IGBT 200.Over-voltage feedback module 130 is connected to
It the collector of IGBT 200 and recommends between module 120, for generating feedback action when IGBT 200 turns off over-voltage.
Detection module 140 is connected between over-voltage feedback module 130 and drive module 110, for feeding back mould according to over-voltage
The feedback action of block 130 generates detection signal and send to drive module 110, and drive module 110 is according to detection Signal Regulation driving letter
Number to adjust the on-off rate of IGBT 200.
The IGBT drive circuit provided according to embodiments of the present invention increases detection module 140 to provide to drive module 110
Detect signal, drive module 110 learns that the operating condition of IGBT 200 becomes from nominal situation the spy of overvoltage according to the detection signal
Different operating condition can further extend the pass of IGBT 200 to adjust driving signal 110 to adjust the on-off rate of IGBT 200
Disconnected duration, reduces the shutdown peak voltage of IGBT 200, to solve the problems, such as the over-voltage breakdown of IGBT 200.IGBT under special operation condition
200 shutdown duration is greater than the shutdown duration of IGBT 200 under nominal situation, so as to reduce in the duration of special operation condition
The action frequency of over-voltage feedback module 130 solves the problems, such as that over-voltage feedback module 130 is easy failure due to perseveration.
Fig. 2 shows the circuit structure diagram of IGBT drive circuit according to an embodiment of the present invention, IGBT 200 have gate pole G0,
Collector C0 and emitter E 0.
Recommending module 120 includes that polarity is different and recommend the first of connection and recommend triode Q21, second recommend triode
Q22, recommending module 120 may include base terminal B2 and emitter terminal E2, wherein recommending the emitter terminal E2 connection of module 120
The gate pole G0 of IGBT 200.In some embodiments, it recommends between the gate pole G0 of emitter terminal E2 and IGBT 200 of module 120
First resistor R21 is can connect.
Over-voltage feedback module 130 namely clamp circuit, the Transient Suppression Diode (Transient including multiple concatenations
Voltage Suppressor, TVS) Z1, Z2, Z3, Z4, it can be generated when the peak voltage of IGBT 200 is higher than predetermined value anti-
Feedback movement.Over-voltage feedback module 130 includes the first test side C3 and feedback end A3.The anode conduct of over-voltage feedback module 130
The feedback end A3 of over-voltage feedback module 130, first detection of the cathode of over-voltage feedback module 130 as over-voltage feedback module 130
Hold C3.The wherein collector C0 of the first test side C3 connection IGBT 200 of over-voltage feedback module 130, over-voltage feedback module 130
Feedback end A3 connection recommend module 120.
In some embodiments, between the collector C0 of the first test side C3 and IGBT 200 of over-voltage feedback module 130
Second resistance R31 is can connect.In some embodiments, module 120 is recommended in the feedback end A3 connection of over-voltage feedback module 130
Base terminal B2, and 3rd resistor R32 can be set between the two.In some embodiments, over-voltage feedback module 130 is anti-
Feedback end A3 is also connected with the gate pole G0 of IGBT 200, and the 4th resistance R33 can be set between the two.
Drive module 110 includes input terminal Pin and output end, and module is recommended in the output end connection of drive module 110
120.In the present embodiment, the base terminal B2 of module 120 is recommended in the output end connection of drive module 110.
Detection module 140 includes the second test side D4 and signal end S4, the second test side D4 connection of detection module 140
The feedback end A3 of over-voltage feedback module 130, the input terminal Pin of the signal end S4 connection drive module 110 of detection module 140.Inspection
Module 140 is surveyed according to the feedback action of the second test side D4 over-voltage feedback module 130 detected generation detection signal, and by
Signal end S4 is sent to the input terminal Pin of drive module 110.
In the present embodiment, driving signal includes the first cut-off signals and the second cut-off signals.Drive module 110 includes the
One output end T1 and second output terminal T2.First output end T1 of drive module 110 and recommending connects useful between module 120
In transmit the first cut-off signals the first breaking circuit 151, the second output terminal T2 of drive module 110 and recommend module 120 it
Between be connected with the second breaking circuit 152 for being used for transmission the second cut-off signals.Wherein, the resistance value of the first breaking circuit 151 is big
In the resistance value of the second breaking circuit 152, grow up so that recommending when module 120 receives the movement of the first cut-off signals generation movement
In the movement duration for receiving the second cut-off signals generation movement.
The module 120 of recommending of the present embodiment includes that polarity is different and recommend the first of connection and recommend triode Q21, second push away
Draw triode Q22.In some embodiments, first triode Q21 is recommended as PNP type triode, second, which recommends triode Q22, is
NPN type triode.Wherein, the first cut-off signals, the second cut-off signals can be controlled separately first recommended in module 120 and recommend
Triode Q21 is connected with different movement durations, and then is controlled IGBT 200 respectively and turned off with different movement durations.First pushes away
It draws triode Q21 and receives the movement duration of the first cut-off signals generation turn-on action greater than reception the second cut-off signals generation conducting
The movement duration of movement, so that the shutdown duration of IGBT 200 is greater than in the second cut-off signals under the driving of the first cut-off signals
Driving under IGBT 200 shutdown duration.
When control IGBT 200 is turned off in normal conditions, shutdown movement is carried out using the second cut-off signals.In IGBT
200 peak voltage is higher than under the overvoltage special operation condition of predetermined value, and driving circuit can be closed using the first cut-off signals
Disconnected movement extends the shutdown duration of IGBT 200 relatively, reduces the shutdown peak voltage of IGBT 200, avoid under nominal situation
The over-voltage breakdown of IGBT 200.
Due to extending shutdown duration significantly using the first cut-off signals, in the duration of entire special operation condition, use
First cut-off signals drive IGBT 200 to turn off, and compared to the shutdown mode under nominal situation, can significantly reduce over-voltage feedback mould
The action frequency of block 130 can be easy the problem of failing due to perseveration to avoid over-voltage feedback module 130.
In the present embodiment, concatenation first turns off resistance R51 on the first breaking circuit 151, goes here and there on the second breaking circuit 152
It meets the second shutdown resistance R52, the first shutdown resistance R51 and turns off resistance R52 much larger than second, so that the first breaking circuit 151
Resistance is much larger than the resistance of the second breaking circuit 152, to reduce the passage current of device included by push-pull circuit 120.
In some embodiments, driving signal further includes Continuity signal, and drive module 110 further includes third output end T3,
It third output end T3 and recommends and is connected with the turning circuit 153 for being used for transmission Continuity signal between module 120.Wherein, some
In embodiment, conducting resistance R53 can be concatenated on turning circuit 153.
The drive module 110 of the present embodiment includes detection transistor Q4.Wherein, the base stage B4 of triode Q4 is detected as the
The feedback end A3 of two test side D4 connection over-voltage feedback modules 130, the collector C4 for detecting triode Q4 are logical as signal end S4
It crosses reset circuit 141 and connects scheduled voltage, as previously mentioned, signal end S4 is also connected with the input terminal Pin of drive module 110.?
In some embodiments, detects and can connect the between the base stage B4 of triode Q4 and the feedback end A3 of over-voltage feedback module 130
Five resistance R41.
According to above-mentioned drive module 110, may be implemented the feedback action of over-voltage feedback module 130 to drive module 110
Feedback, drive module 110 distinguish the judgement of operating condition.The 130 generation movement of over-voltage feedback module is so that detection transistor Q4 is connected
And when signal end S4 generates first detection signal, drive module 110 generates the first cut-off signals according to first detection signal.Inspection
It surveys triode Q4 to turn off so that reset circuit 141 is when signal end S4 generates the second detection signal, drive module 110 is according to second
It detects signal and generates the second cut-off signals.
It can be detected in the form of digital quantity according to the drive module 110 of the present embodiment by the way that detection transistor Q4 is arranged
The movement of over-voltage feedback module 130 in driving circuit is determined with facilitating drive module 110 to distinguish the judgement of operating condition and making correspondence
Plan.
In the present embodiment, the emitter E 4 of detection transistor Q4 is grounded, and reset circuit 141 is pull-up resistor, connection
There is pull-up resistor R42.Above-mentioned first detection signal is that low level detects signal, and the second above-mentioned detection signal is high level inspection
Survey signal.
In the present embodiment, drive module 110 includes controller 111 and buffer 112.Wherein, controller 111 is IGBT
The logic control element of driving circuit, comprising programmable logic device (Field-Programmable Gate Array,
FPGA), input terminal Pin is set to controller 111.Buffer 112 is electrically connected with controller 111, the first above-mentioned output end
T1, second output terminal T2, third output end T3 are set to buffer 112, and pass through the first breaking circuit 151, second respectively
Breaking circuit 152 and turning circuit 153 are electrically connected with module 120 is recommended.
The embodiment of the present invention also provides a kind of control method of IGBT drive circuit, can be applied to control above-mentioned hair
The IGBT drive circuit of bright embodiment.
Fig. 3 shows the flow chart of the control method of IGBT drive circuit according to an embodiment of the present invention.
In step s 110, the movement of over-voltage feedback module is detected, wherein in normal conditions, over-voltage feedback module is not
It acts, in the case where the peak voltage of IGBT is higher than the overvoltage special operation condition of predetermined value, it is dynamic that feedback occurs for over-voltage feedback module
Make.
Step S120 is carried out if detecting that feedback action occurs for over-voltage feedback module, if if detecting that over-voltage is anti-
Feedback module occurs feedback action and then carries out step S140.
In step S120, first detection signal is obtained when detecting that feedback action occurs for over-voltage feedback module.
Then step S130 is carried out, the first shutdown mode is entered according to first detection signal.In the first shutdown mode, control
Module execution in the first duration is recommended, so that IGBT is turned off in the first duration.
The second shutdown mode is switched to after the first duration.Wherein, in the second shutdown mode, control recommends module second
Execution in duration, so that IGBT is turned off in the second duration, wherein the first duration is greater than the second duration.
In the control method of the embodiment of the present invention, after the first duration that step S130 is carried out, step S110 is carried out again
The step of detection, illustrates to be still in special operation condition if feedback action occurs for over-voltage feedback module, is believed according to the first detection
Number enter the first shutdown mode, that is, detect over-voltage feedback module occur feedback action continue step S120.
Above-mentioned steps circulation carries out, until detecting that feedback action does not occur for over-voltage feedback module, illustrates to have worn at this time
More special operation condition and enter nominal situation, that is, detect over-voltage feedback module do not occur feedback action carry out step S140.
In step S140, detect that feedback action does not occur for over-voltage feedback module to obtain the second detection signal.
Then step S150 is carried out, the second shutdown mode is entered according to the second detection signal.As previously mentioned, the second shutdown mould
Formula turns off IGBT in the second duration.
In the present embodiment, it the output end of the drive module of IGBT drive circuit and recommends and is connected with the first pass between module
Deenergizing and the second breaking circuit, wherein the resistance of the first breaking circuit is greater than the resistance of the second breaking circuit.
It is turned off by the first breaking circuit to module transfer first is recommended in the output end of the first shutdown mode, drive module
Signal；Believed by the second breaking circuit to the shutdown of module transfer second is recommended in the output end of the second shutdown mode, drive module
Number.
Due to the first breaking circuit resistance be greater than the second breaking circuit resistance (resistance of usual first breaking circuit is remote
Greater than the resistance of the second breaking circuit) so that the first shutdown mode is with respect to the second shutdown mode, device included by push-pull circuit
Passage current is lower, so that the speed of actions of device in push-pull circuit is reduced, correspondingly, the shutdown of IGBT under the first shutdown mode
Duration is greater than the shutdown duration of IGBT under the second shutdown mode, reduces the shutdown peak voltage of IGBT, the over-voltage of IGBT is avoided to hit
It wears.
In the present embodiment, in the duration of entire special operation condition, driving circuit carries out primary or circulation and rewritten a limited number of times enters
First shutdown mode, in identical special operation condition duration, since IGBT turns off duration much larger than second under the first shutdown mode
IGBT turns off duration under shutdown mode, and the limitation of pattern switching number is reduced, and can substantially reduce over-voltage feedback module or even whole
The action frequency of a driving circuit can be easy the problem of failing due to perseveration to avoid over-voltage feedback module.
In some embodiments, control method can also include: to record to the first detection signal of acquisition, when pre-
When lasting detection obtains first detection signal in timing is long, generates fault message and be sent out.
Such as in the driving circuit of the embodiments of the present invention, if whithin a period of time, the input of drive module 110
End Pin is continuously detected first detection signal, then generates fault message, when foregoing circuit is applied to the unsteady flow of wind power generating set
When in device, which can be sent to inverter controller, inverter controller is shut down according to the fault message
Detection.
The embodiment of the present invention also provides a kind of current transformer comprising the IGBT drive circuit of any of the above-described embodiment.
A kind of current transformer according to an embodiment of the present invention adjusts the on-off rate of IGBT by adjusting driving signal, can
It further to extend the shutdown duration of IGBT, reduces it and turns off peak voltage, to solve the problems, such as the over-voltage breakdown of IGBT, improve
IGBT reliability of operation.The action frequency for additionally reducing over-voltage feedback module solves over-voltage feedback module due to persistently moving
Make the problem of being easy failure, improves IGBT drive circuit and current transformer reliability of operation.It is driven improving IGBT and IGBT
On the basis of dynamic circuit and current transformer reliability of operation, when current transformer is applied in wind power generating set, it is possible to reduce wind
The power generation loss of power generator group.
According to present invention embodiment as described above, these embodiments details all there is no detailed descriptionthe, also not
Limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is principle and practical application in order to better explain the present invention, thus belonging to making
Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.The present invention is only by right
The limitation of claim and its full scope and equivalent.
Claims (10)
1. a kind of IGBT drive circuit characterized by comprising
Drive module (110), for generating the driving signal of driving IGBT (200) movement；
Module (120) are recommended, are connected between the drive module (110) and the IGBT (200), for believing the driving
Number power amplification, and the driving signal after power amplification is exported to the gate pole of (200) the IGBT (G0)；
Over-voltage feedback module (130), be connected to (200) the IGBT collector (C0) and it is described recommend between module (120),
For generating feedback action when the IGBT (200) turn off over-voltage；And
Detection module (140) is connected between the over-voltage feedback module (130) and the drive module (110), is used for basis
The feedback action of the over-voltage feedback module (130) generates detection signal and send to the drive module (110), the drive module
(110) driving signal described in Signal Regulation is detected to adjust the on-off rate of the IGBT (200) according to described.
2. IGBT drive circuit according to claim 1, which is characterized in that the driving signal includes the first cut-off signals
With the second cut-off signals；
The drive module (110) includes the first output end (T1) and second output terminal (T2)；The drive module (110)
First output end (T1) and described recommend are connected with the be used for transmission first cut-off signals first shutdown between module (120)
Circuit (151), the second output terminal (T2) of the drive module (110) and it is described recommend to be connected between module (120) be used for
The second breaking circuit (152) of second cut-off signals is transmitted, wherein the resistance value of first breaking circuit (151) is greater than
The resistance value of second breaking circuit (152) so that it is described recommend module (120) receive first cut-off signals generate it is dynamic
The movement duration of work is greater than the movement duration for receiving the second cut-off signals generation movement；
The module (120) of recommending includes that polarity is different and recommend the first of connection and recommend triode (Q21), second recommend three poles
Manage (Q22), first cut-off signals, second cut-off signals control respectively described in recommend in module (120) first push away
Triode (Q21) is drawn to be connected with different movement durations.
3. IGBT drive circuit according to claim 2, which is characterized in that the detection module (140) includes:
The base stage (B4) of detection transistor (Q4), detection triode (Q4) connects the anti-of the over-voltage feedback module (130)
It presents end (A3), the collector (C4) of detection triode (Q4) is pre- by reset circuit (141) connection as signal end (S4)
Constant voltage source, the signal end (S4) are also connected with the input terminal (Pin) of the drive module (110)；
Over-voltage feedback module (130) generation acts so that the detection transistor (Q4) is connected and at the signal end (S4)
When generating first detection signal, the drive module (110) generates first cut-off signals according to the first detection signal；
The detection transistor (Q4) turns off so that the reset circuit (141) generates the second detection letter at the signal end (S4)
Number when, the drive module (110) generates second cut-off signals according to the second detection signal.
4. IGBT drive circuit according to claim 3, which is characterized in that the emitter of the detection transistor (Q4)
(E4) it being grounded, the reset circuit (141) is pull-up resistor, and the first detection signal is that low level detects signal, described the
Two detection signals are that high level detects signal.
5. IGBT drive circuit according to claim 2, which is characterized in that the driving signal further includes Continuity signal,
The drive module (110) further includes third output end (T3), the third output end (T3) and it is described recommend module (120) it
Between be connected with the turning circuit (153) for being used for transmission the Continuity signal.
6. IGBT drive circuit according to any one of claims 1 to 5, the over-voltage feedback module (130) includes multiple
The anode of the Transient Suppression Diode (Z1, Z2, Z3, Z4) of concatenation, the over-voltage feedback module (130) is fed back as the over-voltage
The feedback end (A3) of module (130), the cathode of the over-voltage feedback module (130) is as the over-voltage feedback module (130)
First test side (C3), first test side (C3) connect the collector (C0) of the IGBT (200).
7. IGBT drive circuit according to any one of claims 1 to 5, which is characterized in that the over-voltage feedback module
(130) feedback end (A3) is also connected with the gate pole (G0) of (200) the IGBT.
8. a kind of control method of IGBT drive circuit drives electricity applied to the IGBT as described in any one of claims 1 to 7
Road, which is characterized in that the control method of the IGBT drive circuit includes:
Detect the movement of over-voltage feedback module；
First detection signal is obtained when detecting that feedback action occurs for the over-voltage feedback module；According to the first detection letter
Number enter the first shutdown mode, in first shutdown mode, module execution in the first duration is recommended in control, so that institute
IGBT is stated to turn off in first duration；
The second shutdown mode is switched to after first duration, in second shutdown mode, module is recommended described in control and exists
Execution in second duration, so that the IGBT is turned off in second duration, wherein first duration is greater than described
Second duration；
The step of carrying out the movement of the detection over-voltage feedback module again after first duration, and according to first inspection
It surveys signal and enters first shutdown mode, until detecting that feedback action does not occur for the over-voltage feedback module to obtain second
Detect signal；
Enter second shutdown mode according to the second detection signal.
9. control method according to claim 8, which is characterized in that further include:
The first detection signal of acquisition is recorded, when persistently detection obtains the first detection letter in scheduled duration
Number when, generate fault message simultaneously be sent out.
10. a kind of current transformer, which is characterized in that including IGBT drive circuit according to any one of claims 1 to 7.
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| CN201811610318.6A CN109494970B (en) | 2018-12-27 | 2018-12-27 | IGBT (insulated Gate Bipolar transistor) driving circuit, control method thereof and converter |
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| CN201811610318.6A CN109494970B (en) | 2018-12-27 | 2018-12-27 | IGBT (insulated Gate Bipolar transistor) driving circuit, control method thereof and converter |
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| CN109494970B (en) | 2020-08-07 |
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