CN106451392B - The over-pressure safety device of IGBT pipe - Google Patents
The over-pressure safety device of IGBT pipe Download PDFInfo
- Publication number
- CN106451392B CN106451392B CN201510486328.3A CN201510486328A CN106451392B CN 106451392 B CN106451392 B CN 106451392B CN 201510486328 A CN201510486328 A CN 201510486328A CN 106451392 B CN106451392 B CN 106451392B
- Authority
- CN
- China
- Prior art keywords
- resistance
- igbt pipe
- signal
- module
- comparator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of over-pressure safety devices of IGBT pipe, comprising: acquisition module, for acquiring the C pole tension of IGBT pipe to export first voltage；Comparison module, for generating comparison signal according to first voltage；Decompression protection module, for output protection signal to control the work of IGBT pipe in magnification region, to carry out decompression protection to IGBT pipe；Switch control module; its pwm signal receiving end controls IGBT pipe for receiving pwm signal in normal operating conditions; there is first path between the pwm signal receiving end being connected with control signal end and signal output end; releasing for being connected with decompression protection module has the second path between signal receiving end and signal output end; switch control module controls first path according to comparison signal or the second path is connected, to correspond to output pwm signal or protection signal by signal output end.Make the work of IGBT pipe in amplification region to carry out pressure release, effective protection IGBT pipe by decompression protection module when IGBT pipe over-voltage as a result, while not influencing the normal work of IGBT pipe.
Description
Technical field
The present invention relates to power electronics field, in particular to a kind of over-pressure safety device of IGBT pipe.
Background technique
IGBT Guan Yinqi driving power is small and is widely used the characteristics of saturation pressure reduces.In the related art, IGBT
Pipe is often damaged because of over-voltage.But none effective method of the relevant technologies is to solve the overpressure problems of IGBT pipe.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
Purpose is to propose a kind of over-pressure safety device of IGBT pipe that can carry out IGBT pipe overvoltage protection.
In order to achieve the above objectives, the embodiment of the present invention proposes a kind of over-pressure safety device of IGBT pipe, comprising: acquisition mould
Block, the acquisition module are used to acquire the C pole tension of IGBT pipe to export first voltage by the output end of the acquisition module；
Comparison module, the comparison module are used to generate comparison signal according to the first voltage；Decompression protection module, the pressure release are protected
Shield module controls the IGBT pipe work for output protection signal in magnification region, to carry out pressure release guarantor to the IGBT pipe
Shield；Switch control module, the switch control module have signal input part, signal output end, pwm signal receiving end and release
Signal receiving end, the pwm signal receiving end control the IGBT pipe for receiving pwm signal and are in normal operating conditions,
The signal input part is connected with the comparison module, and the signal receiving end of releasing is connected with the decompression protection module, institute
Stating has first path between pwm signal receiving end and the signal output end, signal receiving end and the signal of releasing
There is the second path, the switch control module controls the first path or described according to the comparison signal between output end
Second path is connected, to export the pwm signal or the protection signal by the way that the signal output end is corresponding.
The over-pressure safety device of the IGBT pipe proposed according to embodiments of the present invention passes through the pwm signal of switch control module
Receiving end receives pwm signal to control IGBT pipe in normal operating conditions, and passes through decompression protection module output protection signal
Decompression protection is carried out to control the work of IGBT pipe in magnification region, and then to IGBT pipe, switch control module is according to comparison module
The comparison signal control first path of generation or the second path are connected, to correspond to output pwm signal or guarantor by signal output end
Protect signal.As a result, when the overtension of IGBT pipe, make the work of IGBT pipe in amplification region to be let out by decompression protection module
Pressure so that IGBT pipe be effectively protected, while not influencing the normal work of IGBT pipe.
A specific embodiment according to the present invention, the comparison module includes: comparator, the positive input of the comparator
End is connected with the output end of the acquisition module, the negative input end of the comparator and the circuit for providing voltage of offer reference voltage
It is connected, the output end of the comparator is connected with the signal input part of the switch control module, the power end of the comparator
It is connected with the first default power supply, the ground terminal ground connection of the comparator.
Further, a specific embodiment according to the present invention, the comparison module includes: first resistor, and described
One end of one resistance is connected with the output end of the comparator, the positive input of the other end of the first resistor and the comparator
End is connected.
According to one embodiment of present invention, when the C pole tension of the IGBT pipe rises above the first predeterminated voltage,
The switch control module controls second path and connects and control the first path disconnection；When the pole C of the IGBT pipe
When voltage drops to less than the second predeterminated voltage, the switch control module controls the first path and connects and control described the
Two paths disconnect, wherein second predeterminated voltage is less than first predeterminated voltage.
Wherein, the circuit for providing voltage includes: concatenated second resistance and 3rd resistor, one end of the second resistance
It is connected with the described first default power supply, the other end of the second resistance is connected with one end of the 3rd resistor, the third
The other end of resistance is grounded, wherein has first node, the first node between the second resistance and the 3rd resistor
It is connected with the negative input end of the comparator.
Further, the comparison module further include: the 4th resistance, one end and the comparator of the 4th resistance
Output end is connected, and the other end of the 4th resistance is connected with the described first default power supply.
A specific embodiment according to the present invention, the acquisition module include: concatenated 5th resistance and the 6th resistance,
One end of 5th resistance is extremely connected with the C of the IGBT pipe, the other end and the 6th resistance of the 5th resistance
One end is connected, the other end ground connection of the 6th resistance, wherein have second between the 5th resistance and the 6th resistance
Node, output end of the second node as the acquisition module.
A specific embodiment according to the present invention, the decompression protection module include: concatenated 7th resistance and pressure stabilizing
One end of diode, the 7th resistance is connected with the second default power supply, the other end of the 7th resistance and the pressure stabilizing two
The cathode of pole pipe is connected, the plus earth of the zener diode, wherein between the 7th resistance and the zener diode
With third node, the third node is connected with the signal receiving end of releasing of the switch control module.
A specific embodiment according to the present invention, the over-pressure safety device of the IGBT pipe further includes described in driving
The driving circuit of IGBT pipe, wherein the driving circuit includes: the 8th resistance；NPN triode and PNP triode, the NPN
The collector of triode is connected by the 8th resistance with the described second default power supply, the emitter of the NPN triode and
The emitter of the PNP triode is connected, and the base stage of the NPN triode is connected with the base stage of the PNP triode, described
The grounded collector of PNP triode, wherein have between the emitter of the NPN triode and the emitter of the PNP triode
Have fourth node, between the base stage of the NPN triode and the base stage of the PNP triode have the 5th node, the described 5th
Node is connected with the signal output end of the switch control module；9th resistance, one end and the described 4th of the 9th resistance
Node is connected, and the other end of the 9th resistance is extremely connected with the C of the IGBT pipe；First capacitor, the one of the first capacitor
End is extremely connected with the C of the other end of the 9th resistance and the IGBT pipe respectively, the other end ground connection of the first capacitor.
Detailed description of the invention
Fig. 1 is the block diagram of the over-pressure safety device of IGBT pipe according to an embodiment of the present invention；
Fig. 2 is the control principle schematic diagram of the over-pressure safety device of IGBT pipe according to an embodiment of the invention；
Fig. 3 is the circuit diagram of the over-pressure safety device of IGBT pipe accord to a specific embodiment of that present invention；And
Fig. 4 is the circuit of power filter in the over-pressure safety device of the IGBT pipe of another specific embodiment according to the present invention
Schematic diagram.
Appended drawing reference:
Acquisition module 10, comparison module 20, decompression protection module 40, switch control module 50, driving circuit 60 and IGBT
Pipe 70；
Comparator LM, first resistor R1, circuit for providing voltage 201, second resistance R2,3rd resistor R3 and the 4th resistance
R4；
5th resistance R5, the 6th resistance R6, the 7th resistance R7 and zener diode ZD；
8th resistance R8, NPN triode Q1, PNP triode Q2, the 9th resistance R9 and first capacitor C1；
Tenth resistance R10, the first filter capacitor C2 and the second filter capacitor C3.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition IGBT ((Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor) pipe over-pressure safety device.
Fig. 1 is the block diagram of the over-pressure safety device of IGBT pipe according to an embodiment of the present invention.Of the invention one
In a preferred embodiment, IGBT pipe 70 be may be provided in the resonance modules of electric heater unit, by the conducting for controlling IGBT pipe 70
Or it turns off so that resonant capacitance and resonance coil in resonance modules carry out resonant operational.Specifically, the pole the E (hair of IGBT pipe 70
Emitter-base bandgap grading) ground connection, the pole C (collector) of IGBT pipe 70 can be connected with resonant capacitance and resonance coil, in this way, passing through acquisition IGBT pipe
70 C pole tension i.e. can determine whether IGBT pipe 70 whether over-voltage, to realize overvoltage protection.It should be noted that implementing above
Although example in be illustrated by taking electric heater unit as an example, IGBT pipe 70 can also using in other electric appliances.
As shown in Figure 1, the over-pressure safety device of IGBT pipe according to an embodiment of the present invention includes: acquisition module 10, compares
Module 20, decompression protection module 40 and switch control module 50.
Wherein, acquisition module 10 is used to acquire the C pole tension of IGBT pipe 70 to export by the output end of acquisition module 10
First voltage；Comparison module 20 is used to generate comparison signal according to first voltage；Decompression protection module 40 is believed for output protection
Number to control the work of IGBT pipe 70 in magnification region, to carry out decompression protection to IGBT pipe 70.
There is switch control module 50 signal input part, signal output end, pwm signal receiving end and signal of releasing to receive
End, pwm signal receiving end control IGBT pipe 70 for receiving pwm signal and be in normal operating conditions, signal input part and than
It is connected compared with module 20, signal receiving end of releasing is connected with decompression protection module 40, between pwm signal receiving end and signal output end
With first path, release between signal receiving end and signal output end have the second path, switch control module 50 according to than
First path is controlled compared with signal or the second path is connected, to correspond to output pwm signal or protection signal by signal output end.?
That is the pwm signal receiving end of switch control module 50 can be connected to receive pwm signal, switch control module with controller
50 can pass through signal output end output pwm signal when controlling first path and connecting；Switch control module 50 is controlling the second tunnel
Diameter can pass through signal output end output protection signal when connecting.
That is, during the pwm signal by receiving controls IGBT pipe 70, it can be by acquiring mould
Block 10 acquires the C pole tension of IGBT pipe 70 in real time and exports first voltage, and comparison module 20 judges that IGBT is managed according to first voltage
70 whether over-voltage and according to judging result export comparison signal, later, switch control module 50 is according to comparison signal in normal work
Make to switch between channel (first path) and decompression protection channel (the second path), if over-voltage, it is logical to switch to protection
Road, if non-over-voltage, switches to realize overvoltage protection and works normally channel.
It should be noted that the C pole tension of IGBT pipe 70 is in IGBT pipe 70 in the case where the pole E of IGBT pipe 70 is grounded
It is substantially equal to ground voltage when conducting, the over-voltage phenomenon of the C pole tension of IGBT pipe 70 will occur during IGBT pipe 70 turns off,
The normal work that decompression protection switching has substantially no effect on IGBT pipe is carried out during IGBT pipe 70 turns off in this way.
The over-pressure safety device for the IGBT pipe that the embodiment of the present invention proposes as a result, passes through the pwm signal of switch control module
Receiving end receives pwm signal to control IGBT pipe in normal operating conditions, and passes through decompression protection module output protection signal
Decompression protection is carried out to control the work of IGBT pipe in magnification region, and then to IGBT pipe, switch control module is according to comparison module
The comparison signal control first path of generation or the second path are connected, to correspond to output pwm signal or guarantor by signal output end
Protect signal.In this way, making the work of IGBT pipe in amplification region to be let out by decompression protection module when the overtension of IGBT pipe
Pressure so that IGBT pipe be effectively protected, while not influencing the normal work of IGBT pipe.
It is carried out below with reference to circuit structure of the Fig. 2 and Fig. 3 to the over-pressure safety device of the IGBT pipe of the embodiment of the present invention detailed
Thin description.
A specific embodiment according to the present invention, as shown in figure 3, comparison module 20 includes: comparator LM.
Wherein, the positive input terminal of comparator LM is connected with the output end of acquisition module 10, the negative input end of comparator LM with
The circuit for providing voltage 201 for providing reference voltage Vref is connected, the output end of comparator LM and the signal of switch control module 50
Input terminal, that is, pin 1 is connected with pin 16, and the power end of comparator LM is connected with the first default power vd D (such as+8.2V), than
Ground terminal ground connection compared with device LM.
Further, as shown in figure 3, comparison module 20 further include: first resistor R1, wherein one end of first resistor R1
It is connected with the output end of comparator LM, the other end of first resistor R1 is connected with the positive input terminal of comparator LM.It needs to illustrate
It is that first resistor R1 is the positive feedback resistor of comparator LM, can determines the length of comparison signal flip-flop transition.
According to one embodiment of present invention, the variation of the C pole tension of IGBT pipe can be as illustrated by the waveforms in figure 2.Such as Fig. 2
Shown, when the C pole tension of IGBT pipe 70 rises above the first predeterminated voltage such as voltage value A, switch control module 50 is controlled
It makes the second path and connects and control first path disconnection, carry out decompression protection；When the C pole tension of IGBT pipe 70 drops to less than
When two predeterminated voltages such as voltage value B, switch control module 50 controls first path and connects and control the disconnection of the second path, stops
Decompression protection, wherein the second predeterminated voltage is less than the first predeterminated voltage.
That is, can prolong after the guiding path of switch control module 50 switches to the second path by first path
When the regular hour, until the C pole tension of IGBT pipe is released to lower than voltage value B, opened with carrying out pressure release within the regular hour
The guiding path for closing control module 50 switches to first path by the second path.
Further, as shown in figure 3, comparison module LM further include: the 4th resistance R4, one end of the 4th resistance R4 is compared with
The output end of device LM is connected, and the other end of the 4th resistance R4 is connected with the first default power vd D.It should be noted that the 4th electricity
Hinder the pull-up resistor that R4 is comparator LM.
Specifically, as shown in figure 3, circuit for providing voltage 201 includes: second resistance R2 and 3rd resistor R3.Second resistance
R2 and 3rd resistor R3 series connection, one end of second resistance R2 is connected with the first default power vd D, the other end of second resistance R2 and
One end of 3rd resistor R3 is connected, the other end ground connection of 3rd resistor R3, wherein have between second resistance R2 and 3rd resistor R3
There is first node, first node is connected with the negative input end of comparator LM, and first node can provide reference voltage Vref extremely in other words
The negative input end of comparator LM.In other words, the reference voltage Vref of the negative input end of comparator LM is by second resistance R2 and third
The partial pressure of resistance R3 provides.
A specific embodiment according to the present invention, as shown in figure 3, acquisition module 10 includes: the 5th resistance R5 and the 6th
Resistance R6.Wherein, the 5th resistance R5 and the 6th resistance R6 series connection, one end of the 5th resistance R5 are extremely connected with the C of IGBT pipe 70, the
The other end of five resistance R5 is connected with one end of the 6th resistance R6, the other end ground connection of the 6th resistance R6, wherein the 5th resistance R5
There is second node between the 6th resistance R6, second node is as the output end of acquisition module 10 and the positive input of comparator LM
End is connected.
As described above, being preset when the C pole tension of IGBT pipe 70 does not occur the over-voltage i.e. C pole tension of IGBT pipe 70 lower than first
When voltage such as voltage value A, the reference voltage of negative input end of the voltage less than comparator LM of the positive input terminal of comparator LM
The output end of Vref, comparator LM export low level, and one end of first resistor R1 can regard ground connection as at this time, and first resistor R1's is another
One end is also connected with second node, and such first resistor R1 is in parallel with the 6th resistance R6, and the C pole tension of IGBT pipe 70 will be by the 5th
The positive input terminal of comparator LM is input to after resistance R5 and parallel connection first resistor R1 and the 6th resistance R6 partial pressure again.
It later, is more than the first predeterminated voltage when the over-voltage i.e. C pole tension of IGBT pipe 70 occurs in the C pole tension of IGBT pipe 70
When, the reference voltage Vref of negative input end of the voltage greater than comparator LM of the positive input terminal of comparator LM, comparator LM's is defeated
Outlet exports high level, and first resistor R1 will be no longer in parallel with the 6th resistance R6, and the C pole tension of IGBT pipe 70 will be by the 5th resistance
The positive input terminal of comparator LM is input to after R5 and the 6th resistance R6 partial pressure again, is prolonged in this way by the positive feedback of first resistor R1
When comparator LM will export the high level of certain time；Comparator LM exports high level to switch control module 50, switch simultaneously
Control module 50 controls the second path and connects, and is released by decompression protection module 40, the C pole tension of IGBT pipe 70 will gradually
It reduces, when the C pole tension of IGBT pipe deteriorates to less than the second predeterminated voltage such as voltage value B, the positive input terminal of comparator LM
Negative input end of the voltage less than comparator LM reference voltage Vref, the output end of comparator LM exports low level to switching control
Molding block 50, switch control module 50 control first path and connect, and IGBT pipe 70 is restored to normal operating conditions.It is understood that
It is the time of high level can be exported by adjusting the resistance value adjustment of first resistor R1, i.e., between adjustment inverse time.
A specific embodiment according to the present invention, as shown in figure 3, decompression protection module 40 include: the 7th resistance R7 and
Zener diode ZD.Wherein, the 7th resistance R7 and zener diode ZD series connection, one end of the 7th resistance R7 and the second default power supply
VCC (such as+18V) is connected, and the other end of the 7th resistance R7 is connected with the cathode of zener diode ZD, the sun of zener diode ZD
Pole ground connection, wherein there is third node, third node and switch control module 50 between the 7th resistance R7 and zener diode ZD
Release signal receiving end i.e. pin 7 be connected.
That is, the exportable stable voltage of decompression protection module 40 is so that control IGBT pipe 70 works in amplification region
Domain.Had after switching tube and push-pull circuit 0.7V~1.5V or so the stable voltage of loss may be about 7V~
8V。
In addition, power end, that is, pin 14 of switch control module 50 is connected with the second default power supply VCC, switch control module
50 ground terminal, that is, pin 15 is grounded.
A specific embodiment according to the present invention, as shown in figure 3, the over-pressure safety device of IGBT pipe further include: driving
The driving circuit 60 of IGBT pipe 70, wherein driving circuit 60 include: the 8th resistance R8, NPN triode Q1, PNP triode Q2,
9th resistance R9 and first capacitor C1.
The collector of NPN triode Q1 is connected by the 8th resistance R8 with the second default power supply VCC, NPN triode Q1
Emitter is connected with the emitter of PNP triode Q2, and the base stage of NPN triode Q1 is connected with the base stage of PNP triode Q2, PNP
The grounded collector of triode Q1, wherein have the between the emitter of NPN triode Q1 and the emitter of PNP triode Q2
Four nodes, have the 5th node between the base stage of NPN triode Q1 and the base stage of PNP triode Q2, the 5th node and switch are controlled
Signal output end, that is, pin 8 of molding block 50 is connected；One end of 9th resistance R9 is connected with fourth node, and the 9th resistance R9's is another
One end is extremely connected with the C of IGBT pipe 70；One end of first capacitor C1 C with the other end of the 9th resistance R9 and IGBT pipe 70 respectively
Extremely it is connected, the other end ground connection of first capacitor C1.
Specifically, the output end of comparator LM exports low level when the C pole tension of IGBT pipe 70 over-voltage does not occur,
Switch control module 50 controls first path and connects, and pwm signal is input to the pole G of IGBT pipe 70 by driving circuit 60, at this time
By the current limliting of NPN triode Q1 and PNP triode the Q2 push-pull circuit and the 9th resistance R9 constituted, it is in IGBT pipe 70 just
Normal working condition.
When over-voltage occurs in the C pole tension of IGBT pipe 70, the output end of comparator LM exports high level, switch control module
50 the second paths of control are connected, and protection signal is input to the pole G of IGBT pipe 70 by driving circuit 60, passes through tri- pole NPN at this time
The current limliting of push-pull circuit and the 9th resistance R9 that pipe Q1 and PNP triode Q2 are constituted, makes IGBT pipe 70 be in magnification region, with into
Row pressure release.
In addition, a specific embodiment according to the present invention, as shown in figure 3, the over-pressure safety device of IGBT pipe further include:
Tenth resistance R10, wherein pwm signal receiving end, that is, pin 4 of switch control module 50 passes through the tenth resistance R10 and controller
It is connected,.
Another specific embodiment according to the present invention, as shown in figure 4, the over-pressure safety device of IGBT pipe further include: the
One filter capacitor C2, one end of the first filter capacitor C2 are connected with the first default power vd D, the other end of the first filter capacitor C2
Ground connection, the first filter capacitor C2 is for being filtered the first default power vd D.Preferably, the first filter capacitor C2 can be electricity
Capacitor is solved, the anode of electrolytic capacitor is connected with the first default power vd D, the cathode ground connection of electrolytic capacitor.
Another specific embodiment according to the present invention, as shown in figure 4, the over-pressure safety device of IGBT pipe further include: the
Two filter capacitor C3, one end of the second filter capacitor C3 are connected with the second default power supply VCC, the other end of the second filter capacitor C2
Ground connection, the second filter capacitor C3 is for being filtered the second default power supply VCC.Preferably, the second filter capacitor C3 can be electricity
Capacitor is solved, the anode of electrolytic capacitor is connected with the second default power supply VCC, the cathode ground connection of electrolytic capacitor.
In conclusion the over-pressure safety device of the IGBT pipe proposed according to embodiments of the present invention, passes through switch control module
Pwm signal receiving end receive pwm signal to control IGBT pipe in normal operating conditions, and exported by decompression protection module
Protection signal with control IGBT pipe work in magnification region, and then to IGBT pipe carry out decompression protection, switch control module according to
The comparison signal control first path or the second path that comparison module generates are connected, to pass through the corresponding output PWM of signal output end
Signal or protection signal.As a result, when the overtension of IGBT pipe, make the work of IGBT pipe in amplification region by decompression protection module
To carry out pressure release, so that IGBT pipe be effectively protected, while the normal work of IGBT pipe is not influenced.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (8)
1. a kind of over-pressure safety device of IGBT pipe characterized by comprising
Acquisition module, the acquisition module are used to acquire the C pole tension of IGBT pipe with defeated by the output end of the acquisition module
First voltage out；
Comparison module, the comparison module are used to generate comparison signal according to the first voltage；
Decompression protection module, the decompression protection module control the IGBT pipe work for output protection signal in amplification region
Domain, to carry out decompression protection to the IGBT pipe；And
Switch control module, the switch control module have signal input part, signal output end, pwm signal receiving end and let out
Discharge signal receiving end, the pwm signal receiving end control the IGBT pipe for receiving pwm signal in normal work shape
State, the signal input part are connected with the comparison module, and the signal receiving end of releasing is connected with the decompression protection module,
There is first path, signal receiving end and the letter of releasing between the pwm signal receiving end and the signal output end
There is the second path, the switch control module controls the first path or institute according to the comparison signal between number output end
The connection of the second path is stated, to export the pwm signal or the protection signal by the way that the signal output end is corresponding；
Wherein, the decompression protection module includes:
One end of concatenated 7th resistance and zener diode, the 7th resistance is connected with the second default power supply, and the described 7th
The other end of resistance is connected with the cathode of the zener diode, the plus earth of the zener diode, wherein the described 7th
There is third node, the signal of releasing of the third node and the switch control module between resistance and the zener diode
Receiving end is connected.
2. the over-pressure safety device of IGBT pipe as described in claim 1, which is characterized in that the comparison module includes:
Comparator, the positive input terminal of the comparator are connected with the output end of the acquisition module, the negative input of the comparator
It holds and is connected with the circuit for providing voltage for providing reference voltage, the signal of the output end of the comparator and the switch control module
Input terminal is connected, and the power end of the comparator is connected with the first default power supply, the ground terminal ground connection of the comparator.
3. the over-pressure safety device of IGBT pipe as claimed in claim 2, which is characterized in that the comparison module includes:
First resistor, one end of the first resistor are connected with the output end of the comparator, the other end of the first resistor
It is connected with the positive input terminal of the comparator.
4. the over-pressure safety device of IGBT pipe as claimed in claim 3, which is characterized in that
When the C pole tension of the IGBT pipe rises above the first predeterminated voltage, switch control module control described the
Two paths are connected and control the first path and disconnect；And
When the C pole tension of the IGBT pipe drops to less than the second predeterminated voltage, switch control module control described the
One path is connected and controls second path and disconnects, wherein second predeterminated voltage is less than first predeterminated voltage.
5. the over-pressure safety device of IGBT pipe as claimed in claim 3, which is characterized in that the circuit for providing voltage includes:
Concatenated second resistance and 3rd resistor, one end of the second resistance are connected with the described first default power supply, and described
The other end of two resistance is connected with one end of the 3rd resistor, the other end ground connection of the 3rd resistor, wherein described second
There is first node, the first node is connected with the negative input end of the comparator between resistance and the 3rd resistor.
6. the over-pressure safety device of IGBT pipe as claimed in claim 3, which is characterized in that the comparison module further include:
One end of 4th resistance, the 4th resistance is connected with the output end of the comparator, the other end of the 4th resistance
It is connected with the described first default power supply.
7. such as the over-pressure safety device of IGBT pipe of any of claims 1-6, which is characterized in that the acquisition module
Include:
One end of concatenated 5th resistance and the 6th resistance, the 5th resistance is extremely connected with the C of the IGBT pipe, and the described 5th
The other end of resistance is connected with one end of the 6th resistance, the other end ground connection of the 6th resistance, wherein the 5th electricity
There is second node, output end of the second node as the acquisition module between resistance and the 6th resistance.
8. the over-pressure safety device of IGBT pipe as described in claim 1, which is characterized in that the over-pressure safety device further includes
Drive the driving circuit of the IGBT pipe, wherein the driving circuit includes:
8th resistance；
The collector of NPN triode and PNP triode, the NPN triode is default with described second by the 8th resistance
Power supply is connected, and the emitter of the NPN triode is connected with the emitter of the PNP triode, the base stage of the NPN triode
It is connected with the base stage of the PNP triode, the grounded collector of the PNP triode, wherein the transmitting of the NPN triode
There is fourth node, the base stage of the NPN triode and the PNP triode between pole and the emitter of the PNP triode
Base stage between there is the 5th node, the 5th node is connected with the signal output end of the switch control module；
One end of 9th resistance, the 9th resistance is connected with the fourth node, the other end of the 9th resistance with it is described
The G of IGBT pipe is extremely connected；And
First capacitor, one end of the first capacitor pole G phase with the other end of the 9th resistance and the IGBT pipe respectively
Even, the other end ground connection of the first capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510486328.3A CN106451392B (en) | 2015-08-10 | 2015-08-10 | The over-pressure safety device of IGBT pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510486328.3A CN106451392B (en) | 2015-08-10 | 2015-08-10 | The over-pressure safety device of IGBT pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106451392A CN106451392A (en) | 2017-02-22 |
| CN106451392B true CN106451392B (en) | 2019-04-02 |
Family
ID=58092784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510486328.3A Active CN106451392B (en) | 2015-08-10 | 2015-08-10 | The over-pressure safety device of IGBT pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106451392B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786368A (en) * | 2020-07-13 | 2020-10-16 | 珠海格力智能装备有限公司 | Power-off protection circuit and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009207294A (en) * | 2008-02-28 | 2009-09-10 | Fuji Electric Systems Co Ltd | Overvoltage protection device for voltage drive type semiconductor element |
| CN102208800A (en) * | 2011-06-09 | 2011-10-05 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN102324835A (en) * | 2011-10-14 | 2012-01-18 | 广东易事特电源股份有限公司 | Insulated gate bipolar transistor (IGBT) driving circuit |
| CN102931960A (en) * | 2012-10-24 | 2013-02-13 | 华为技术有限公司 | IGBT (insulated gate bipolar translator) protection method and protection circuit |
| CN104659757A (en) * | 2014-12-25 | 2015-05-27 | 深圳青铜剑电力电子科技有限公司 | IGBT overvoltage protection circuit and IGBT overvoltage protection method |
-
2015
- 2015-08-10 CN CN201510486328.3A patent/CN106451392B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009207294A (en) * | 2008-02-28 | 2009-09-10 | Fuji Electric Systems Co Ltd | Overvoltage protection device for voltage drive type semiconductor element |
| CN102208800A (en) * | 2011-06-09 | 2011-10-05 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN102324835A (en) * | 2011-10-14 | 2012-01-18 | 广东易事特电源股份有限公司 | Insulated gate bipolar transistor (IGBT) driving circuit |
| CN102931960A (en) * | 2012-10-24 | 2013-02-13 | 华为技术有限公司 | IGBT (insulated gate bipolar translator) protection method and protection circuit |
| CN104659757A (en) * | 2014-12-25 | 2015-05-27 | 深圳青铜剑电力电子科技有限公司 | IGBT overvoltage protection circuit and IGBT overvoltage protection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106451392A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107943182B (en) | Band gap reference start-up circuit | |
| CN108092496A (en) | For the active-clamp overvoltage protection of Switching power device | |
| CN101102075A (en) | Switch element driving circuit | |
| CN103280765A (en) | Overvoltage protection circuit | |
| CN109768789B (en) | GaN HEMT drain electrode control circuit and device | |
| CN102882358A (en) | Methods and systems for operating power converters | |
| CN107404778B (en) | Electromagnetic heating cooking system and driving control circuit and detection method thereof | |
| CN102842886A (en) | Overvoltage protection circuit | |
| CN207612045U (en) | A kind of protection chip | |
| CN106451392B (en) | The over-pressure safety device of IGBT pipe | |
| CN105680839B (en) | A kind of three level driving circuit of I types | |
| CN104218519A (en) | Overvoltage protection circuit and lamp | |
| CN108668392A (en) | The Drive Protecting Circuit and method of electromagnetic heating apparatus and its power switch tube | |
| CN108323218A (en) | A kind of driving circuit and electronic equipment | |
| CN203289075U (en) | Overvoltage protection circuit | |
| CN203225658U (en) | Self-conduction boost switch power supply | |
| CN107635299B (en) | Electromagnetic heating cooking system and driving chip of power switch tube thereof | |
| CN104124949A (en) | Bootstrap circuit, inverter and air conditioner | |
| CN208092580U (en) | Vehicle and sensor are for electric installation | |
| CN104714581B (en) | Based on the star loaded camera power supply system of transformer | |
| CN210927073U (en) | Overvoltage protection device and vehicle | |
| CN206947944U (en) | Printer head power supply circuit and printer | |
| CN209134294U (en) | A kind of started with high voltage and constant current circuit with temperature-compensating | |
| CN110224696B (en) | Drive protection circuit | |
| CN209313421U (en) | A kind of accessory power supply voltage regulator circuit of included overheat protector function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |