CN108233695A - The dead time dynamic regulation circuit and air conditioner of IGBT module - Google Patents
The dead time dynamic regulation circuit and air conditioner of IGBT module Download PDFInfo
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- CN108233695A CN108233695A CN201810143547.5A CN201810143547A CN108233695A CN 108233695 A CN108233695 A CN 108233695A CN 201810143547 A CN201810143547 A CN 201810143547A CN 108233695 A CN108233695 A CN 108233695A
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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
- H02M1/38—Means for preventing simultaneous conduction of switches
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
-
- 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
- H02M1/38—Means for preventing simultaneous conduction of switches
- H02M1/385—Means for preventing simultaneous conduction of switches with means for correcting output voltage deviations introduced by the dead time
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses the dead time dynamic regulation circuit and air conditioner of a kind of IGBT module, the dead time dynamic regulation circuit of the IGBT module includes voltage detecting circuit, signal processing control circuit and dead time and adjusts circuit；Voltage detecting circuit is used to sample the operating current of IGBT module and the operating current sampled is converted to voltage signal, while the voltage signal is exported to the feedback input end of signal processing control circuit；Signal processing control circuit is used for the control signal according to the corresponding control signal of voltage signal output received to dead zone time adjustment circuit；Dead time adjusts circuit and is used to that the dead time of IGBT module to be adjusted according to the control signal that receives, so that the dead time of IGBT module follows the variation of the operating current of IGBT module and dynamic regulation.Present invention greatly enhances the functional reliabilities of IGBT module.
Description
Technical field
The present invention relates to the dead time dynamic regulation circuits and air-conditioning of air-conditioner field more particularly to a kind of IGBT module
Device.
Background technology
Ideally, the upper and lower same bridge arm IGBT pipes of the IGBT module of inverter are staggeredly to lead on and off in air conditioner
It opens, i.e., when upper bridge arm IGBT pipes are connected, the lower bridge arm IGBT pipes of same bridge arm are to disconnect；Conversely, when upper bridge arm IGBT is managed
During disconnection, the lower bridge arm IGBT pipes of same bridge arm are conductings.Since IGBT pipes are in itself there are junction capacity, IGBT pipes are led
On and off is opened all there are certain delay phenomenon, and the IGBT pipes that this delay is likely to result in a bridge arm are not fully disconnected, separately
The IGBT pipes of one bridge arm are in the conduction state, so that the bridge arm is in the state of shoot through, and bridge arm is straight-through
Short circuit can seriously damage IGBT module, so as to influence the reliability of IGBT module.
It, in practical applications, should be by the upper and lower same bridge in IGBT module in order to which IGBT module is enable reliably to work
Arm IGBT pipes open and disconnection is staggered the regular hour, that is, set a dead time, to avoid the break-make due to IGBT pipes
Postpone and cause the shoot through phenomenon of bridge arm.However, dead band time setting must be bigger, the work of IGBT pipes is more reliable, but can lead
It causes the output waveform distortion of IGBT module and reduces the delivery efficiency of IGBT module, therefore, theoretically dead band time setting must be got over
It is small better, but for the reliability that IGBT pipes work in IGBT module, and have to setting dead time.However, the prior art
In, the dead time to IGBT module setting is fixed, therefore there are following defects：If dead band time setting is larger,
The output waveform of IGBT module can be caused to be distorted and reduce the delivery efficiency of IGBT module；If dead band time setting is smaller,
There are the risks of bridge arm direct pass short circuit during high current.
Invention content
It is a primary object of the present invention to provide a kind of dead time dynamic regulation circuit of IGBT module, it is intended to improve
The functional reliability of IGBT module.
To achieve these goals, the present invention provides a kind of dead time dynamic regulation circuit of IGBT module, described
The dead time dynamic regulation circuit of IGBT module includes voltage detecting circuit, signal processing control circuit and dead time and adjusts
Circuit；Wherein：
The voltage detecting circuit, the work for being sampled and being sampled for the operating current to IGBT module
Electric current is converted to voltage signal, while the voltage signal is exported to the feedback input end of the signal processing control circuit；
The signal processing control circuit, for controlling signal extremely according to the voltage signal output received is corresponding
The dead time adjusts the control signal of circuit；
The dead time adjusts circuit, for the dead zone according to the control signal received to the IGBT module
Time is adjusted so that the dead time of the IGBT module follows the variation of the operating current of the IGBT module and dynamic
It adjusts.
Preferably, the detection input of the voltage detecting circuit is connect with the IGBT module, the voltage detecting electricity
The detection output on road is connect with the feedback input end of the signal processing control circuit, the control of the signal processing control circuit
The control signal that output terminal processed adjusts circuit with the dead time is connect, and the dead time adjusts the driving output of circuit
Driving circuit of the end through the IGBT module is connect with the driving input terminal of the IGBT module.
Preferably, the dead time adjusts circuit and is driven including operating voltage input terminal, the first driving input terminal, second
Input terminal, the first NOT gate, the second NOT gate, the first diode, the second diode, the first pull-up resistor, the second pull-up resistor, first
RC circuit units, the 2nd RC circuit units, first adjust the drive output of circuit with door and second and door, the dead time
Including the first drive output and the second drive output；Wherein：
The input terminal of first NOT gate is connect with the described second driving input terminal, the output terminal of first NOT gate and institute
State the cathode connection of the first diode, the anode of first diode respectively with the first end of first pull-up resistor and institute
The first end connection of the first RC circuit units is stated, the second end of first pull-up resistor connects with the operating voltage input terminal
Connect, the second ends of the first RC circuit units ground connection, the anode of first diode also with described first and the first of door
Input terminal connects, and described first connect with the second input terminal of door with the described first driving input terminal, the first RC circuit lists
The control signal of member is connect with the control output end of the signal processing control circuit；
The input terminal of second NOT gate is connect with the described first driving input terminal, the output terminal of second NOT gate and institute
State the cathode connection of the second diode, the anode of second diode respectively with the first end of second pull-up resistor and institute
The first end connection of the 2nd RC circuit units is stated, the second end of second pull-up resistor connects with the operating voltage input terminal
Connect, the second ends of the 2nd RC circuit units ground connection, the anode of second diode also with described second and the first of door
Input terminal connects, and described second connect with the second input terminal of door with the described second driving input terminal, the 2nd RC circuit lists
The control signal of member is connect with the control output end of the signal processing control circuit.
Preferably, the first driving input terminal is used to input the upper bridge drive input signal of the IGBT module, described
Second driving input terminal is used to input the lower bridge drive input signal of the IGBT module；First drive output is through through institute
The driving circuit for stating IGBT module is connect with the upper bridge of IGBT module driving input terminal, and second drive output is through warp
The driving circuit of the IGBT module is connect with the lower bridge driving input terminal of the IGBT module.
Preferably, the first RC circuit units include first resistor module and the first capacitance；Wherein：
The first end of the first resistor module is connect with the anode of first diode, the first resistor module
Second end is through first capacity earth, control signal and the signal processing control circuit of the first resistor module
Control output end connects.
Preferably, the 2nd RC circuit units include second resistance module and the second capacitance；Wherein：
The first end of the second resistance module is connect with the anode of second diode, the second resistance module
Second end is through second capacity earth, control signal and the signal processing control circuit of the second resistance module
Control output end connects.
Preferably, the first resistor module includes multiple resistance being sequentially connected in series, and each resistance is respectively with one
Controllable switch is in parallel, and the control output end of the control terminal of each controllable switch with the signal processing control circuit is connect.
Preferably, the controllable switch is NMOS tube or PMOS tube.
Preferably, the structure of the second resistance module is identical with the structure of the first resistor module.
In addition, to achieve the above object, the present invention also provides a kind of air conditioner, the air conditioner includes as described above
The dead time dynamic regulation circuit of IGBT module.
The present invention provides a kind of dead time dynamic regulation circuit of IGBT module, the dead time dynamic of the IGBT module
It adjusts circuit and includes voltage detecting circuit, signal processing control circuit and dead time adjusting circuit；The voltage detecting circuit,
It is sampled for the operating current to IGBT module and the operating current sampled is converted into voltage signal, simultaneously will
The voltage signal is exported to the feedback input end of the signal processing control circuit；The signal processing control circuit, is used for
The control signal of circuit is adjusted to the dead time according to the corresponding control signal of voltage signal output received；
The dead time adjusts circuit, for being carried out according to the control signal received to the dead time of the IGBT module
It adjusts, so that the dead time of the IGBT module follows the variation of the operating current of the IGBT module and dynamic regulation.This
Invention can be according to the control signal that the signal processing control circuit exports to described due to dead time adjusting circuit
The dead time of IGBT module is adjusted so that the dead time of the IGBT module can follow the work of the IGBT module
Make the variation of electric current and dynamic regulation, so that the present invention can not only avoid the output waveform of IGBT module from being distorted and IGBT
The phenomenon that delivery efficiency of module reduces, but also can avoid leading to bridge arm direct pass short circuit during the work of IGBT module high current
Risk, and then greatly improve the functional reliability of IGBT module.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Structure according to these attached drawings obtains other attached drawings.
Fig. 1 is the high-level schematic functional block diagram of one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention；
Fig. 2 is the structure diagram of one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention；
Fig. 3 is first resistor module described in one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention
Structure diagram；
Fig. 4 be IGBT module of the present invention one embodiment of dead time dynamic regulation circuit in predetermined voltage threshold with it is described
The mapping relations schematic diagram of the operating current of IGBT module.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of dead time dynamic regulation circuit of IGBT module, for solving existing IGBT module because of it
Dead time it is unadjustable and cause IGBT module output waveform be distorted and IGBT module delivery efficiency reduce the phenomenon that with
And lead to the risk of bridge arm direct pass short circuit when IGBT module high current being avoided to work.
Fig. 1 is the high-level schematic functional block diagram of one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention, is joined
According to Fig. 1, in one embodiment, the dead time dynamic regulation circuit 10 of the IGBT module includes voltage detecting circuit 101, signal
Control and treatment circuit 102 and dead time adjust circuit 103.
Specifically, the voltage detecting circuit 101 is sampled for the operating current to IGBT module 20 and will be sampled
To the operating current be converted to voltage signal Vref, while the voltage signal Vref is exported to the signal processing control
The feedback input end FB of circuit 102 processed；
The signal processing control circuit 102, for the voltage signal received according to the feedback input end FB
Vref exports the control signal that corresponding control signal adjusts circuit 103 to the dead time；
The dead time adjusts circuit 103, for the institute exported according to the signal processing control circuit 102 is received
State control signal, the dead time of the IGBT module 20 be adjusted so that the dead time of the IGBT module 20 with
The dynamic regulation with the variation of the operating current of the IGBT module 20.
In the present embodiment, the detection input of the voltage detecting circuit 101 is connect with the IGBT module 20, the electricity
The detection output of pressure detection circuit 101 is connect with the feedback input end FB of the signal processing control circuit 102, the signal
The control signal that the control output end of control and treatment circuit 102 adjusts circuit 103 with the dead time is connect, the dead zone
Driving circuit 30 of the drive output of time adjustment circuit 103 through the IGBT module 20 and the driving of the IGBT module 20
Input terminal connects.
Fig. 2 is the structure diagram of one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention, is joined together
According to Fig. 1 and Fig. 2, in the present embodiment, the dead time adjusts circuit 103, and to include operating voltage input terminal VCC, the first driving defeated
Enter to hold IN1, the second driving input terminal IN2, the first NOT gate U1, the second NOT gate U2, the first diode D1, the second diode D2, the
One pull-up resistor R1, the second pull-up resistor R2, the first RC circuit units 1031, the 2nd RC circuit units 1032, first and door U3
And second and door U4, the drive output that the dead time adjusts circuit include the drivings of the first drive output OUT1 and second
Output terminal OUT2.
Specifically, in the present embodiment, the dead time adjusts the input terminal of the first NOT gate U1 and institute described in circuit 103
The second driving input terminal IN2 connections are stated, the output terminal of the first NOT gate U1 is connect with the cathode of the first diode D1, institute
State the anode of the first diode D1 respectively with the first end of the first pull-up resistor R1 and the first RC circuit units 1031
First end connection, the second end of the first pull-up resistor R1 connect with the operating voltage input terminal VCC, the first RC
The second end ground connection of circuit unit 1031, the anode of the first diode D1 also with described first and the first input end of door U3
Connection, described first connect with the second input terminal of door U3 with the described first driving input terminal IN1, the first RC circuit units
1031 control signal adjusts the first control signal of circuit 103, the first RC circuit units for the dead time
1031 control signal is connect with the control output end of the signal processing control circuit 102；
In the present embodiment, the input terminal of the second NOT gate U2 is connect with the described first driving input terminal IN1, and described second
The output terminal of NOT gate U2 is connect with the cathode of the second diode D2, and the anode of the second diode D2 is respectively with described
The first end of two pull-up resistor R2 and the connection of the first end of the 2nd RC circuit units 1032, the second pull-up resistor R2's
Second end is connect with the operating voltage input terminal VCC, the second end ground connection of the 2nd RC circuit units 1032, and described second
The anode of diode D2 is also connect with described second with the first input end of door U4, described second with the second input terminal of door U4 with
The second driving input terminal IN2 connections, the control signal of the 2nd RC circuit units 1032 is the dead time tune
Economize on electricity second control signal on road 103, the control signals of the 2nd RC circuit units 1032 also with the signal processing
The control output end connection of control circuit 102.
It should be noted that in the present embodiment, the first driving input terminal IN1 is used to input the IGBT module 20
Upper bridge drive input signal, the second driving input terminal IN2 are used to input the lower bridge driving input letter of the IGBT module 20
Number；Upper bridges of the first drive output OUT1 through the driving circuit 30 through the IGBT module 20 Yu the IGBT module 20
Drive input terminal E connections, the second drive output OUT2 through the driving circuit 30 through the IGBT module 20 with it is described
The lower bridge driving input terminal F connections of IGBT module 20.
In the present embodiment, the first RC circuit units 1031 include 105 and first capacitance C1 of first resistor module.Specifically
Ground, the first end of the first resistor module 105 are connect with the anode of the first diode D1, the first resistor module
105 second end is grounded through the first capacitance C1, and the control signal of the first resistor module 105 is the first RC electricity
The control signal of road unit 1031, control signal and the signal processing control circuit of the first resistor module 105
102 control output end connection.
In the present embodiment, the 2nd RC circuit units 1032 include 106 and second capacitance C2 of second resistance module.Specifically
Ground, the first end of the second resistance module 106 are connect with the anode of the second diode D2, the second resistance module
106 second end is grounded through the second capacitance C2, and the control signal of the second resistance module 106 is the 2nd RC electricity
The control signal of road unit 1032, control signal and the signal processing control circuit of the second resistance module 106
102 control output end connection.
Fig. 3 is first resistor module described in one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention
Structure diagram, together with reference to Fig. 2 and Fig. 3, in the present embodiment, the first resistor in the first RC circuit units 1031
Module 105 includes multiple resistance being sequentially connected in series, and each resistance is respectively in parallel with a controllable switch, each described controllably to open
Control output end of the control terminal of pass with the signal processing control circuit 102 is connect.Specifically, it is described in the present embodiment
First resistor module 1031 includes the resistance R11, the resistance R12 that are sequentially connected in series and resistance R1n, and the resistance R11 is with controllably opening
It is in parallel to close Q11, the resistance R12 is in parallel with controllable switch Q12, and so on, the resistance R1n is in parallel with controllable switch Q1n,
Control output end of the control terminal of each controllable switch with the signal processing control circuit 102 is connect.In the present embodiment,
One end A after the resistance R11, resistance R12 and resistance R1n are sequentially connected in series is the first of the first resistor module 1031
End, the first end of the first resistor module 1031 are connect with the anode of the first diode D1, resistance R11, resistance
R12 and resistance R1n be sequentially connected in series after other end B be the first resistor module 1031 second end, the first resistor
The second end of module 1031 through the first capacitance C1 with being grounded.
It is understood that in the present embodiment, above-mentioned controllable switch can be NMOS tube, can also PMOS tube.In addition, it needs
It is noted that in the present embodiment, the resistance number for the resistance being sequentially connected in series in the first resistor module 1031 and each electricity
The resistance value of resistance can be set according to actual conditions.
In the present embodiment, the operation principle of the first resistor module 105 is：When the signal processing control circuit 102
The corresponding control signal of output is to the control terminal of corresponding controllable switch when controlling the controllable switch to be connected, then controllably to be opened with this
Closing resistance in parallel will be short-circuited, for example, controlling signal accordingly to described when the signal processing control circuit 102 exports
The control terminal of controllable switch Q12 with when controlling the controllable switch Q12 to be connected, then it is in parallel with the controllable switch Q12 described in
Resistance R12 can be short-circuited, i.e., in the present embodiment, the signal processing control circuit 102 is by controlling leading for different controllable switches
It is logical, the quantity of resistance being short-circuited in the first resistor module 105 can be adjusted, so as to fulfill the first resistor mould is adjusted
The purpose of the resistance value of block 105.
In the present embodiment, the structure of the second resistance module 106 in the 2nd RC circuit units 1032 and work
Principle is identical with the first resistor module 105, and details are not described herein again.
In the present embodiment, the resistance value of the first resistor module 105 and the second resistance module 106 is according to the voltage
The voltage signal Uref that detection circuit 101 exports is adjusted into Mobile state, since the voltage signal Uref is the voltage
The current working current of the IGBT module 20 is converted into reading for the signal processing control circuit 102 by detection circuit 101
The voltage signal taken, therefore, the resistance value of the first resistor module 105 and the second resistance module 106 is actually basis
The variation of the current working current of the IGBT module 20 and dynamic adjusts.
Specifically, in the present embodiment, the signal processing control circuit 102 is according to the voltage signal Uref received
And the mapping relations of the operating current of predetermined voltage threshold and the IGBT module 20, determine predetermined voltage threshold, Ran Housuo
Signal processing control circuit 102 is stated further according to identified predetermined voltage threshold to control the first resistor module 105 and institute
State the resistance value of second resistance module 106.Specifically, the signal processing control circuit 102 exports corresponding control signal to institute
The control terminal of corresponding controllable switch in first resistor module 105 and the second resistance module 106 is stated, to control first electricity
The conducting of corresponding controllable switch in module 105 and the second resistance module 106 is hindered, so as to adjust the first resistor module
105 and the second resistance module 106 in be short-circuited the quantity of resistance, and then adjust the first resistor module 105 and described
Resistance value in second resistance module 106.
Fig. 4 is predetermined voltage threshold U and institute in one embodiment of dead time dynamic regulation circuit of IGBT module of the present invention
The mapping relations schematic diagram of the operating current Ic of IGBT module is stated, together reference Fig. 2, Fig. 3 and Fig. 4, in the present embodiment, in order to keep away
Exempt from controllable switch perseveration in the first resistor module 105 and the second resistance module 106, the predetermined voltage threshold
U is set using staged, i.e., is in the range of certain stage current in the operating current Ic of the IGBT module 20, corresponding default
Voltage threshold U is set as some definite value.Specifically, in the present embodiment, be more than as the operating current Ic of the IGBT module 20 or
During equal to I1 and less than I2, corresponding predetermined voltage threshold is U1；When the operating current Ic of the IGBT module 20 is more than or waits
In I2 and less than I3 when, corresponding predetermined voltage threshold be U2；And so on, when the operating current Ic of the IGBT module 20 is big
In or equal to It and less than In when, corresponding predetermined voltage threshold be Un.It is understood that in the present embodiment, above-mentioned I1,
The size of I2, I3 and It and the size of above-mentioned U1, U2 and Un can be set according to actual conditions.
In the present embodiment, the dead time of the IGBT module 20 is to adjust circuit 103 by adjusting the dead time
In the first RC circuit units 1031 described in first resistor module 105 resistance value and adjust the 2nd RC circuit lists
The resistance value of second resistance module 106 described in member 1032 realizes, institute in circuit 103 is adjusted by adjusting the dead time
The resistance value for stating the first resistor module 105 in the first RC circuit units 1031 adjusts the first RC circuit units 1031
Described in the first capacitance C1 charge constant, and adjust the dead time and adjust the 2nd RC electricity in circuit 103
The resistance value of the second resistance module 106 in road unit 1032 is adjusted second described in the 2nd RC circuit units 1032
The charge constant of capacitance C2.The present embodiment is by adjusting charging time of the first capacitance C1 and the second capacitance C2
The purpose of the dead time of IGBT module 20 described in dynamic regulation can be realized in constant.
Due to charge constant θ=RC of capacitance, charging timeWherein, u1 is finally filled for capacitance
Piezoelectric voltage, u0 are capacitance initial voltage, and ut is t moment capacitance voltage.The present embodiment passes through the signal processing control circuit 102
The conducting of corresponding controllable switch in the first resistor module 105 and the second resistance module 106 is controlled, so as to adjust described
It is short-circuited in first resistor module 105 in resistance quantity and the adjustment second resistance module 106 and is short-circuited resistance quantity, into
And the resistance value of the first resistor module 105 and the resistance value of the second resistance module 106 are adjusted, it is achieved thereby that described in adjustment
The purpose of the charge constant of first capacitance C1 and the second capacitance C2.
Together with reference to Fig. 2, Fig. 3 and Fig. 4, the operation principle of the dead time dynamic regulation circuit of the present embodiment IGBT module
It is described in detail below：The voltage detecting circuit 101 samples the current working current of the IGBT module 20, and will adopt
Sample to the operating current be converted to voltage signal Uref, while the voltage detecting circuit 101 is by the voltage signal
Uref is exported to the feedback input end FB of the signal processing control circuit 102, and the signal processing control circuit 102 is according to institute
State the voltage signal Uref and predetermined voltage threshold U and the work of the IGBT module 20 that feedback input end FB receives
The mapping relations of electric current Ic determine predetermined voltage threshold, and then the signal processing control circuit 102 is further according to identified pre-
If voltage threshold controls the resistance value of the first resistor module 105 and the second resistance module 106.Specifically, the letter
Number control and treatment circuit 102 exports corresponding control signal to the first resistor module 105 and the second resistance module 106
In corresponding controllable switch control terminal, accordingly may be used with controlling in the first resistor module 105 and the second resistance module 106
The conducting of switch is controlled, so as to adjust the number of resistance is short-circuited in the first resistor module 105 and the second resistance module 106
Amount, and then adjust the resistance value in the first resistor module 105 and the second resistance module 106 so that the first resistor
The charge constant of second capacitance C2 described in first capacitance C1 described in module 105 and the second resistance module 106 expires
The requirement of IGBT pipe on-off delays in the foot IGBT module 20, i.e., in the present embodiment, the dead time adjusts 103 energy of circuit
Enough control signals exported according to the signal processing control circuit 102 adjust the dead time of the IGBT module 20
Section, so that the dead time of the IGBT module 20 follows the variation of the operating current of the IGBT module 20 and dynamic regulation.
Specifically, it is assumed that the dead time dynamic regulation circuit of the present embodiment IGBT module is described dead in original state
The upper bridge drive input signal of first driving input terminal IN1 input of area's time adjustment circuit 103 is low level, during the dead zone
Between adjust circuit 103 the lower bridge drive input signal of the second driving input terminal IN2 input be high level, then during NextState,
The upper bridge drive input signal of the first driving input terminal IN1 inputs is changed into high level, first driving by low level
The lower bridge drive input signal of input terminal IN2 inputs is changed into low level by high level.
During original state, the upper bridge driving that the dead time adjusts the second driving input terminal IN2 inputs of circuit 103 is defeated
When entering signal for high level, which becomes low level after the first NOT gate U1 so that the first diode D1
Forward conduction, the first capacitance C1 discharge by the first resistor module 105, after a period of time, described first with
The first input end of door U3 is changed into low level from high level；
The second driving input terminal IN2 is from original state when entering NextState (when becoming low level), and described the
The output signal of one NOT gate U1 is changed into high level by low level before, and the first diode D1 is changed by forward conduction
Reversely by, the operating voltage input terminal VCC by the first pull-up resistor R1 and the first resistor module 105 to
One capacitance C1 charges.Although at this point, the first driving input terminal IN1 is changed into high level (i.e. described the via low level
The second input terminal of one and door U3 is high level), but since the first input end of described first and door U3 is still low level, because
This, described first is defeated with the output terminal (namely the dead time adjusts the first drive output OUT1 of circuit 103) of door U3
The upper bridge drive output signal gone out is still low level, this state maintains to charge to described first and door U3 to the first capacitance C1
The identifiable minimum high level of first input end.The present embodiment is realized in the IGBT module 20 up and down by above-mentioned flow
Bridge arm IGBT pipe (not shown) is staggered conducting.
Similarly, it is assumed that the dead time dynamic regulation circuit of the present embodiment IGBT module is in original state, the dead zone
The first of time adjustment circuit 103 drives the upper bridge drive input signal that input terminal IN1 is inputted as high level, the dead time
The lower bridge drive input signal for adjusting the second driving input terminal IN2 inputs of circuit 103 is low level, then during NextState, institute
The upper bridge drive input signal for stating the first driving input terminal IN1 inputs is changed into low level by high level, and first driving is defeated
Enter to hold the lower bridge drive input signal that IN2 is inputted to be changed into high level by low level.
During original state, when the first driving input terminal IN1 that the dead time adjusts circuit 103 is high level, the height
Level becomes low level after the second NOT gate U2 so that the second diode D2 forward conductions, second capacitance
C2 discharges by the second resistance module 106, and after a period of time, described second is electric from height with the first input end of door U4
Flat turn becomes low level；
The first driving input terminal IN1 is from original state when entering NextState (when becoming low level), and described the
The output signal of two NOT gate U2 is changed into high level by low level before, and the second diode D2 is changed by forward conduction
Reversely by, the operating voltage input terminal VCC by the second pull-up resistor R2 and the second resistance module 106 to
Two capacitance C2 charge.Although at this point, the second driving input terminal IN2 is changed into high level (i.e. described the via low level
The second input terminal of two and door U4 is high level), but since the first input end of described second and door U4 is still low level, because
This, described second is defeated with the output terminal (namely the dead time adjusts the second drive output OUT2 of circuit 103) of door U4
The lower bridge drive output signal gone out is still low level, this state maintains to charge to described second and door U4 to the second capacitance C2
The identifiable minimum high level of first input end.The present embodiment is realized in the IGBT module 20 up and down by above-mentioned flow
Bridge arm IGBT pipe (not shown) is staggered conducting.
The dead time dynamic regulation circuit of the present embodiment IGBT module, by the voltage detecting circuit 101 to described
The current working current of IGBT module 20 is sampled, and the operating current sampled is converted to voltage signal Uref,
The voltage signal Uref is exported to the feedback input end FB of the signal processing control circuit 102 simultaneously, at the signal
Manage control circuit 102 according to the feedback input end FB voltage signal Uref received and predetermined voltage threshold U with
The mapping relations of the operating current Ic of the IGBT module 20, determine predetermined voltage threshold, then the signal processing control electricity
Road 102 controls the first resistor module 105 and the second resistance module 106 further according to identified predetermined voltage threshold
Resistance value (namely the signal processing control circuit 102 can export corresponding according to the voltage signal Uref received
Signal is controlled to adjust the control signal of circuit 103 to the dead time, to control the first resistor module 105 and described
The resistance value of second resistance module 106) so that the first capacitance C1 and the second resistance described in the first resistor module 105
What the charge constant of the second capacitance C2 described in module 106 met IGBT pipe on-off delays in the IGBT module 20 will
It asks, i.e., in the present embodiment, the dead time adjusts what circuit 103 can be exported according to the signal processing control circuit 102
The dead time of the IGBT module 20 is adjusted in control signal, so that the dead time of the IGBT module 20 follows institute
The variation of the operating current of IGBT module 20 is stated and dynamic regulation, so that the present invention can not only avoid the defeated of IGBT module
The phenomenon that going out the delivery efficiency of wave distortion and IGBT module reduces, but also when IGBT module high current can be avoided to work lead
The risk of bridge arm direct pass short circuit is caused, and then greatly improves the functional reliability of IGBT module.
The present invention also provides a kind of air conditioner, which includes the dead time dynamic regulation circuit of IGBT module, should
The structure of the dead time dynamic regulation circuit of IGBT module can refer to above-described embodiment, and details are not described herein.Naturally,
It, should since the air conditioner of the present embodiment employs the technical solution of the dead time dynamic regulation circuit of above-mentioned IGBT module
Air conditioner has all advantageous effects of the dead time dynamic regulation circuit of above-mentioned IGBT module.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. the dead time dynamic regulation circuit of a kind of IGBT module, which is characterized in that the dead time of the IGBT module is moved
State adjusts circuit and includes voltage detecting circuit, signal processing control circuit and dead time adjusting circuit；Wherein：
The voltage detecting circuit, the operating current for being sampled and being sampled for the operating current to IGBT module
Voltage signal is converted to, while the voltage signal is exported to the feedback input end of the signal processing control circuit；
The signal processing control circuit, for according to the corresponding control signal of voltage signal output received to described
Dead time adjusts the control signal of circuit；
The dead time adjusts circuit, for the dead time according to the control signal received to the IGBT module
It is adjusted, so that the dead time of the IGBT module follows the variation of the operating current of the IGBT module and dynamically adjusts
Section.
2. the dead time dynamic regulation circuit of IGBT module as described in claim 1, which is characterized in that the voltage detecting
The detection input of circuit is connect with the IGBT module, the detection output of the voltage detecting circuit and the signal processing
The feedback input end connection of control circuit, the control output end of the signal processing control circuit adjusts electricity with the dead time
The control signal connection on road, the dead time adjust driving circuit of the drive output of circuit through the IGBT module with
The driving input terminal connection of the IGBT module.
3. the dead time dynamic regulation circuit of IGBT module as claimed in claim 1 or 2, which is characterized in that the dead zone
Time adjustment circuit includes operating voltage input terminal, the first driving input terminal, the second driving input terminal, the first NOT gate, second non-
Door, the first diode, the second diode, the first pull-up resistor, the second pull-up resistor, the first RC circuit units, the 2nd RC circuits
Unit, first with door and second and door, the dead time adjust circuit drive output include the first drive output and
Second drive output；Wherein：
The input terminal of first NOT gate connect with the described second driving input terminal, the output terminal of first NOT gate and described the
The cathode connection of one diode, the anode of first diode respectively with the first end of first pull-up resistor and described the
The first end connection of one RC circuit units, the second end of first pull-up resistor are connect with the operating voltage input terminal, institute
State the second end ground connection of the first RC circuit units, the anode of first diode also with described first and the first input end of door
Connection, described first connect with the second input terminal of door with the described first driving input terminal, the control of the first RC circuit units
Input terminal processed is connect with the control output end of the signal processing control circuit；
The input terminal of second NOT gate connect with the described first driving input terminal, the output terminal of second NOT gate and described the
The cathode connection of two diodes, the anode of second diode respectively with the first end of second pull-up resistor and described the
The first end connection of two RC circuit units, the second end of second pull-up resistor are connect with the operating voltage input terminal, institute
State the second end ground connection of the 2nd RC circuit units, the anode of second diode also with described second and the first input end of door
Connection, described second connect with the second input terminal of door with the described second driving input terminal, the control of the 2nd RC circuit units
Input terminal processed is connect with the control output end of the signal processing control circuit.
4. the dead time dynamic regulation circuit of IGBT module as claimed in claim 3, which is characterized in that first driving
Input terminal is used to input the upper bridge drive input signal of the IGBT module, and the second driving input terminal is described for inputting
The lower bridge drive input signal of IGBT module；First drive output through the driving circuit through the IGBT module with it is described
The upper bridge driving input terminal connection of IGBT module, second drive output is through the driving circuit through the IGBT module and institute
State the lower bridge driving input terminal connection of IGBT module.
5. the dead time dynamic regulation circuit of IGBT module as claimed in claim 4, which is characterized in that the first RC electricity
Road unit includes first resistor module and the first capacitance；Wherein：
The first end of the first resistor module is connect with the anode of first diode, and the second of the first resistor module
End is through first capacity earth, the control signal of the first resistor module and the control of the signal processing control circuit
Output terminal connects.
6. the dead time dynamic regulation circuit of IGBT module as claimed in claim 5, which is characterized in that the 2nd RC electricity
Road unit includes second resistance module and the second capacitance；Wherein：
The first end of the second resistance module is connect with the anode of second diode, and the second of the second resistance module
End is through second capacity earth, the control signal of the second resistance module and the control of the signal processing control circuit
Output terminal connects.
7. the dead time dynamic regulation circuit of IGBT module as claimed in claim 6, which is characterized in that the first resistor
Module includes multiple resistance being sequentially connected in series, and each resistance is respectively in parallel with a controllable switch, each controllable switch
Control output end of the control terminal with the signal processing control circuit connect.
8. the dead time dynamic regulation circuit of IGBT module as claimed in claim 7, which is characterized in that the controllable switch
For NMOS tube or PMOS tube.
9. the dead time dynamic regulation circuit of IGBT module as claimed in claim 7, which is characterized in that the second resistance
The structure of module is identical with the structure of the first resistor module.
10. a kind of air conditioner, which is characterized in that the air conditioner includes the IGBT module described in any one of claim 1 to 9
Dead time dynamic regulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143547.5A CN108233695A (en) | 2018-02-10 | 2018-02-10 | The dead time dynamic regulation circuit and air conditioner of IGBT module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143547.5A CN108233695A (en) | 2018-02-10 | 2018-02-10 | The dead time dynamic regulation circuit and air conditioner of IGBT module |
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| Publication Number | Publication Date |
|---|---|
| CN108233695A true CN108233695A (en) | 2018-06-29 |
Family
ID=62661747
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810143547.5A Pending CN108233695A (en) | 2018-02-10 | 2018-02-10 | The dead time dynamic regulation circuit and air conditioner of IGBT module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366932A (en) * | 2020-10-22 | 2021-02-12 | 西安爱科赛博电气股份有限公司 | IGBT driving dead zone and interlocking circuit capable of adjusting hardware dead zone time |
| CN112532121A (en) * | 2020-12-03 | 2021-03-19 | 中国电子科技集团公司第二十四研究所 | Three-phase brushless motor driving circuit, three-phase brushless motor driver and compensation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207452A (en) * | 2015-09-14 | 2015-12-30 | 江苏物联网研究发展中心 | IGBT drive circuit |
| CN107171543A (en) * | 2017-07-03 | 2017-09-15 | 华域汽车电动系统有限公司 | A kind of IGBT drive signals hardware interlock and the dead time circuit |
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2018
- 2018-02-10 CN CN201810143547.5A patent/CN108233695A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207452A (en) * | 2015-09-14 | 2015-12-30 | 江苏物联网研究发展中心 | IGBT drive circuit |
| CN107171543A (en) * | 2017-07-03 | 2017-09-15 | 华域汽车电动系统有限公司 | A kind of IGBT drive signals hardware interlock and the dead time circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366932A (en) * | 2020-10-22 | 2021-02-12 | 西安爱科赛博电气股份有限公司 | IGBT driving dead zone and interlocking circuit capable of adjusting hardware dead zone time |
| CN112366932B (en) * | 2020-10-22 | 2023-09-08 | 西安爱科赛博电气股份有限公司 | IGBT driving dead zone and interlocking circuit capable of adjusting hardware dead zone time |
| CN112532121A (en) * | 2020-12-03 | 2021-03-19 | 中国电子科技集团公司第二十四研究所 | Three-phase brushless motor driving circuit, three-phase brushless motor driver and compensation method |
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