CN207281632U - A kind of driving voltage regulating device of smooth IGBT variations injunction temperatures - Google Patents
A kind of driving voltage regulating device of smooth IGBT variations injunction temperatures Download PDFInfo
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- CN207281632U CN207281632U CN201721282351.1U CN201721282351U CN207281632U CN 207281632 U CN207281632 U CN 207281632U CN 201721282351 U CN201721282351 U CN 201721282351U CN 207281632 U CN207281632 U CN 207281632U
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Abstract
The utility model discloses a kind of driving voltage regulating device of smooth IGBT variations injunction temperatures, including IGBT module, temperature-measuring module, buffer stock module, temperature comparison module and driving adjustment module.The switching pulse outside the input terminal connection of adjustment module is driven, feedback end connects the output terminal of temperature comparison module, and output terminal connects the control terminal of IGBT module；The output terminal of integrated temperature measurement silicon diode is embedded in the input terminal connection IGBT module of temperature-measuring module, the output terminal of temperature-measuring module is connected to the input terminal of buffer stock module, the input terminal of the output terminal connection temperature comparison module of buffer stock module.The utility model passes through the junction temperature numerical value real-time sampling to IGBT, detect the variation tendency of junction temperature, the amplitude size for driving turning-on voltage is adjusted using controller, and then adjust the power attenuation of IGBT power module, the variations injunction temperature of effectively smooth IGBT, extends the service life of IGBT module on the premise of circuit output performance is not damaged.
Description
Technical field
The utility model belongs to the active thermal control field of power module, more particularly, to a kind of smooth IGBT power
The driving voltage regulating device of module variations injunction temperature.
Background technology
The advantages that modern power electronic circuit because its low noise, high efficiency, high power density, be widely used in industry, army
The fields such as thing, aerospace, carry the important function such as transformation of electrical energy, generation of electricity by new energy.As Power Electronic Circuit is increasingly multiple
Miscellaneous, power grade is continuously improved, and particularly applies in some key areas, the requirement to Power Electronic Circuit reliability is more
It is high.IGBT power module is the core component of power electronics main power circuit, due to the change of its operating condition so that work(
The loss of rate module changes correspondingly, and causes the junction temperature of IGBT also random significantly change, will influence the service life of power module.
By the experience for studying for a long period of time and working, the service life of IGBT power module has closely with the amplitude of variation of its junction temperature
Relation.Variations injunction temperature amplitude is smaller, its service life is longer.Be currently based on the smooth variations injunction temperature of power module active thermal control into
And the research for extending the power module service life is still in infancy, popular method is the switching frequency of adjustment module, is adopted
With different modulation strategies.Both the above means are respectively by varying the switching loss and conduction loss of module, so as to reduce knot
The amplitude of variation of temperature, but all there is the shortcomings that output performance of infringement circuit in both approaches, and practicality is not strong.
IGBT is controlled as voltage controlled switch module, its on off state by the voltage of grid.If IGBT grids and
Voltage between emitter is higher than threshold voltage, and IGBT will be opened, and otherwise IGBT is turned off, but is easy to neglect when use
Slightly influence of the height of grid voltage to IGBT on state characteristics.When positive drive voltage increases, the conducting resistance of IGBT declines,
Conduction voltage drop UCEDecline, and then turn-on consumption and conduction loss will all reduce；When positive drive voltage reduces, the electric conduction of IGBT
Resistance increase, conduction voltage drop UCEIncrease, and then turn-on consumption and conduction loss all will increases.In general, driving turning-on voltage value is
12~18V, representative value 15V.This is also the starting point of the utility model, and electricity is opened by the driving for adjusting IGBT power module
Size is pressed, so as to adjust its power attenuation, module variations injunction temperature amplitude is reduced, extends the service life of module.The utility model it is excellent
One of point is exactly on the premise of not damaging circuit output performance, the effectively smooth change of IGBT power module junction temperature, extension
The service life of module, practicality are stronger.
Utility model content
The defects of for above active thermal control technology, the purpose of this utility model is to provide a kind of smooth IGBT junction temperatures
The driving voltage regulating device and method of change, it is intended to solve the prior art when reducing IGBT power module variations injunction temperature amplitude
The problem of damaging circuit output performance.
The utility model provides a kind of driving voltage regulating device of smooth IGBT variations injunction temperatures, including：IGBT module, temperature
Spend measurement module, buffer stock module, temperature comparison module and driving adjustment module；The input terminal of the driving adjustment module is used
Switching pulse outside connection, the feedback end of the driving adjustment module are used for the output for connecting the temperature comparison module
End, the output terminal of the driving adjustment module are used for the control terminal for connecting IGBT module, the input terminal of the temperature-measuring module
The output terminal of integrated temperature measurement silicon diode is embedded in IGBT module for connecting, the output terminal of the temperature-measuring module is used
In the input terminal of connection buffer stock module, the output terminal of the buffer stock module is used for the input for connecting temperature comparison module
End.
Further, the temperature-measuring module includes drop measurement circuit connected in sequence, simulation input serial ports, Wei Chu
Manage device and signal output serial ports；Wherein microprocessor is made of A/D converter, signal amplifier and microcontroller.
Further, during work, temperature-measuring module is with the junction temperature T of 10K sample frequencys collection IGBTj；Buffer stock mould
Junction temperature data in block storage preset time cycle period T, and flat are asked to the junction temperature data in each preset time cycle period T
Junction temperature average value M is obtained, for detecting the variation tendency of junction temperature, data register is by i-th and i-1 preset time circulating cycle
Average value M in phaseiAnd Mi-1To temperature comparison module, i is positive integer for output；Temperature comparison module compares MiAnd Mi-1Size
Different reference voltage V is exported afterwardsrefInstruction extremely drives the feedback end of adjustment module；Drive reference of the adjustment module according to feedback
Voltage VrefInstruct and combine input switching pulse signal after the adjustable drive voltage signal V of output amplitudeGETo IGBT module
Control terminal, and then control IGBT module turn-on and turn-off.
Further, driving turning-on voltage source is used as using buck converter in the driving adjustment module, by varying
Reference voltage VrefThe size of adjustable output voltage, driving turning-on voltage scope is 12~18V.
Further, the buffer stock module includes：Address compilation device, memory bank, arithmetic unit, data register,
Address compilation device, arithmetic unit, data register are connected with memory bank respectively.
Compared with prior art, the utility model has the following advantages that and remarkable result：
First, control quick and precisely, introduces feedback control, by the junction temperature of real-time sampling IGBT, detects the change of junction temperature
Trend, and then the driving voltage for exporting different amplitudes is controlled, change the loss of IGBT power module, so as to adjust variations injunction temperature.
Secondly, device only adjusts the control terminal of power module, and the output performance of whole circuit is had no effect,
Avoid and carry out impact of the active thermal control to power module by adjusting switching frequency etc..
Brief description of the drawings
Fig. 1 is that a kind of driving voltage regulating device for smooth IGBT variations injunction temperatures that the utility model case study on implementation provides is former
Reason figure.
Fig. 2 is the transmission characteristic for the IGBT that the utility model case study on implementation provides with the variation diagram of different driving voltage.
Fig. 3 is the block diagram that function is realized inside the temperature-measuring module that the utility model case study on implementation provides.
Fig. 4 is the block diagram that the buffer stock inside modules that the utility model case study on implementation provides realize function.
Fig. 5 is the block diagram that function is realized inside the driving adjustment module that the utility model case study on implementation provides.
Fig. 6 is the logical flow chart that the real-time driving voltage that the utility model case study on implementation provides is adjusted.
Fig. 7 is the junction temperature simulation waveform of IGBT before and after the drive adjusting device addition that the utility model case study on implementation provides
Figure.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing to this reality
It is further described with new embodiment.But the implementation not limited to this of the utility model, if it is noted that having not below
Especially describe part in detail, be that those skilled in the art can realize according to the prior art.
In order to solve the problems, such as that traditional active thermal control is with sacrifice circuit output performance.This example design is a set of complete
The scheme of the smooth IGBT variations injunction temperatures of standby closed-loop control, by the real-time detection of the variations injunction temperature trend to IGBT, to IGBT
The big minor adjustment of gate drive voltage of power module carries out closed-loop control.Smooth IGBT variations injunction temperatures provided by the utility model
Driving voltage regulating device, can variations injunction temperatures of effectively smooth IGBT when working under various operating modes.
Fig. 1 is the schematic diagram of the utility model device, and device includes：IGBT module 1, temperature detecting module 2, buffer stock
Module 3, temperature comparison module 4, drives adjustment module 5.Temperature-measuring module is with the junction temperature T of 10K sample frequencys collection IGBTj；
Junction temperature data in buffer stock module storage preset time cycle period T, and to the knot in each preset time cycle period T
Warm data are averaging to obtain junction temperature average value M, detect the variation tendency of junction temperature, and data register is by i-th and i-1 preset time
Computing numerical value M in cycle periodiAnd Mi-1Export to temperature comparison module；Temperature comparison module compares MiAnd Mi-1Size after
Export different reference voltage VrefInstruction extremely drives the feedback end of adjustment module；Drive reference voltage of the adjustment module according to feedback
VrefInstruct and combine input switching pulse signal after the adjustable drive voltage signal V of output amplitudeGETo the control of IGBT module
End processed, and then control the turn-on and turn-off of IGBT module.
Fig. 2 is the output characteristics for the IGBT that the utility model case study on implementation provides with the variation diagram of different driving voltage.With
Grid-emitter voltage UGERise, collector current ICBecome larger, conduction voltage drop UCEDecrease, and then on-state loss also reduces.
Fig. 3 is the block diagram that function is realized inside the temperature-measuring module that the utility model case study on implementation provides.Temperature is examined
Module is surveyed by drop measurement device, simulation input serial ports, microprocessor (A/D converter, signal amplifier, microcontroller), letter
Number output serial ports form.The embedded integrated temperature measurement silicon diode of IGBT is usually used in the junction temperature measurement of the PN junction of IGBT, can lead to
The conduction voltage drop that drop measurement circuit obtains silicon diode is crossed, which is proportional to the junction temperature of IGBT.The conducting pressure of measurement
Drop result obtains the junction temperature numerical value of IGBT after being calculated by a series of processing of microprocessor.The pressure drop of silicon diode and temperature
Relation is approximately 1.7mV/K, i.e., junction temperature often raises 1K, silicon diode pressure drop increase 1.7mV, then the junction temperature of IGBT is：Tj=K ×
(VF-VFref)+T0, wherein：K is coefficient of relationship, T0For rated temperature, VFPressure drop, V are actually turned on for silicon diodeFrefTo be specified
At a temperature of conduction voltage drop.
Fig. 4 is the block diagram that the buffer stock inside modules that the utility model case study on implementation provides realize function.Buffering is posted
Storing module is made of address compilation device, memory bank, arithmetic unit, data register.Address compilation device and memory bank are to temperature survey
The junction temperature data that module is sent temporarily are stored, and arithmetic unit handles junction temperature data in each preset time cycle period T, number
It is used for temporarily storage according to register and is sent to exterior operation result.
Fig. 5 is to drive the block diagram that function is realized inside adjustment module.Drive in adjustment module：By buck converter conduct
Voltage source, its input voltage are 24V, can be by varying reference voltage VrefThe size of its output voltage is adjusted, electricity is opened in driving
Pressure scope is 12~18V.Increase reference voltage V when receivingrefDuring instruction, driving turning-on voltage is adjusted to 18V；Maintained when receiving
Reference voltage VrefDuring instruction, driving turning-on voltage is adjusted to 15V；Reduce reference voltage V when receivingrefDuring instruction, driving is open-minded
Voltage is adjusted to 12V.
Fig. 6 is the logical flow chart that real-time driving voltage is adjusted, and is included the following steps：
(1) the junction temperature numerical value T of real-time sampling IGBTj；
(2) the junction temperature data in a preset time cycle period T are averaging to obtain junction temperature average value Mi, and with it is previous
Numerical value M in a preset time cycle period Ti-1Compare, detect the variation tendency of junction temperature, exported according to comparative result different
Reference voltage instructs；
(3) provided after the reference voltage instruction of feedback to be combined to the switching pulse signal of input for the control terminal of IGBT module
The adjustable driving voltage of amplitude；
(4) repeat step (1)-(3), achieve the purpose that smooth variations injunction temperature.
Junction temperature statistical average M in a preset time cycle period TiMore than Mi-1When, show that junction temperature is rising,
Temperature comparison module output increase reference voltage VrefInstruction to the feedback end for driving adjustment module, i.e. increase drives turning-on voltage
Amplitude, reduce power attenuation increased with smooth junction temperature；Work as MiEqual to Mi-1When, show that junction temperature is gentle, temperature comparison module it is defeated
Go out original reference voltage VrefInstruction maintains to drive the amplitude of turning-on voltage to the feedback end for driving adjustment module；Work as MiIt is less than
Mi-1When, show that junction temperature is declining, the output of temperature comparison module reduces reference voltage VrefInstruction is anti-to driving adjustment module
End is presented, that is, reduces the amplitude of driving turning-on voltage, increase power attenuation is reduced with smooth junction temperature.The preset time circulating cycle
Phase T value can be adjusted between 0.01~0.1s according to different circuit output states.
The junction temperature numerical value T of real-time sampling IGBTj, arithmetic unit seeks the junction temperature sampled data in preset time cycle period T
Averagely obtain junction temperature average value M, the M in more two neighboring preset time cycle periodiAnd Mi-1Size, to detect junction temperature
Variation tendency.Work as MiMore than Mi-1When, show that junction temperature is rising, temperature comparison module output increase reference voltage VrefInstruction is extremely
The amplitude of the feedback end of adjustment module, i.e. increase driving turning-on voltage is driven, reduces power attenuation and is increased with smooth junction temperature.Work as Mi
Equal to Mi-1When, show that junction temperature is gentle, the output original reference voltage V of temperature comparison modulerefInstruction extremely driving adjustment module
Feedback end, that is, maintain the amplitude of driving turning-on voltage.Work as MiLess than Mi-1When, show that junction temperature is declining, temperature comparison module it is defeated
Go out to reduce reference voltage VrefInstruction reduces the amplitude of driving turning-on voltage, increases power to the feedback end for driving adjustment module
Loss is reduced with smooth junction temperature.
Fig. 7 is the junction temperature simulation waveform of IGBT before and after the drive adjusting device addition that the utility model case study on implementation provides.
By taking three-phase inverter plus resistance inductive load as an example, it can be seen that after addition driving voltage regulating device, the rising of IGBT junction temperatures becomes
Gesture and downward trend all become slow, and the average value of junction temperature about reduces 15%, the positive effect of smooth variations injunction temperature.
Claims (5)
- A kind of 1. driving voltage regulating device of smooth IGBT variations injunction temperatures, it is characterised in that including：IGBT module (1), temperature Measurement module (2), buffer stock module (3), temperature comparison module (4) and driving adjustment module (5)；The driving adjustment module Input terminal be used for the switching pulse for connecting outside, the feedback end of the driving adjustment module compares for connecting the temperature The output terminal of module, the output terminal of the driving adjustment module are used for the control terminal for connecting IGBT module, the temperature survey mould The input terminal of block is used to connect the output terminal that integrated temperature measurement silicon diode is embedded in IGBT module, the temperature-measuring module Output terminal be used to connecting the input terminal of buffer stock module, the output terminal of the buffer stock module, which is used to connecting temperature, to be compared The input terminal of module.
- A kind of 2. driving voltage regulating device of smooth IGBT variations injunction temperatures as claimed in claim 1, it is characterised in thatIt is defeated that the temperature-measuring module includes drop measurement circuit connected in sequence, simulation input serial ports, microprocessor and signal Go out serial ports；Wherein microprocessor is made of A/D converter, signal amplifier and microcontroller.
- A kind of 3. driving voltage regulating device of smooth IGBT variations injunction temperatures as claimed in claim 1, it is characterised in that work When, temperature-measuring module is with the junction temperature of 10K sample frequencys collection IGBTT j ；Buffer stock module stores preset time cycle period Junction temperature data in T, and the junction temperature data in each preset time cycle period T are averaging to obtain junction temperature average valueM, it is used for Detect the variation tendency of junction temperature, data register is by theiWithiAverage value in -1 preset time cycle periodM i WithM i-1It is defeated Go out to temperature comparison module,iFor positive integer；Temperature comparison module comparesM i WithM i-1Size after export different reference voltagesV refInstruction extremely drives the feedback end of adjustment module；Drive reference voltage of the adjustment module according to feedbackV refInstruct and combine input Switching pulse signal after the adjustable drive voltage signal of output amplitudeV GETo the control terminal of IGBT module, and then control IGBT The turn-on and turn-off of module.
- A kind of 4. driving voltage regulating device of smooth IGBT variations injunction temperatures as described in claim 1 or 3, it is characterised in that Using buck converter as driving turning-on voltage source in the driving adjustment module, by varying reference voltageV refIt is adjustable The size of output voltage, driving turning-on voltage scope is 12 ~ 18V.
- 5. the driving voltage regulating device of a kind of smooth IGBT variations injunction temperatures as claimed in claim 1, it is characterised in that described Buffer stock module include：Address compilation device, memory bank, arithmetic unit, data register, address compilation device, arithmetic unit, data Register is connected with memory bank respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721282351.1U CN207281632U (en) | 2017-09-30 | 2017-09-30 | A kind of driving voltage regulating device of smooth IGBT variations injunction temperatures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721282351.1U CN207281632U (en) | 2017-09-30 | 2017-09-30 | A kind of driving voltage regulating device of smooth IGBT variations injunction temperatures |
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| CN207281632U true CN207281632U (en) | 2018-04-27 |
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| CN201721282351.1U Expired - Fee Related CN207281632U (en) | 2017-09-30 | 2017-09-30 | A kind of driving voltage regulating device of smooth IGBT variations injunction temperatures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656567A (en) * | 2017-09-30 | 2018-02-02 | 华南理工大学 | A kind of the driving voltage adjusting means and method of smooth IGBT variations injunction temperatures |
| CN108680848A (en) * | 2018-06-14 | 2018-10-19 | 山东阅芯电子科技有限公司 | Second grade power circulation test method and device |
-
2017
- 2017-09-30 CN CN201721282351.1U patent/CN207281632U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656567A (en) * | 2017-09-30 | 2018-02-02 | 华南理工大学 | A kind of the driving voltage adjusting means and method of smooth IGBT variations injunction temperatures |
| CN108680848A (en) * | 2018-06-14 | 2018-10-19 | 山东阅芯电子科技有限公司 | Second grade power circulation test method and device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180427 Termination date: 20190930 |