CN203708090U - IGBT driving circuit with self-checking function - Google Patents
IGBT driving circuit with self-checking function Download PDFInfo
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- CN203708090U CN203708090U CN201320660172.2U CN201320660172U CN203708090U CN 203708090 U CN203708090 U CN 203708090U CN 201320660172 U CN201320660172 U CN 201320660172U CN 203708090 U CN203708090 U CN 203708090U
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Abstract
The utility model discloses an IGBT driving circuit with a self-checking function. The IGBT driving circuit comprises an IGBT operating module with an IGBT, a detection module for detecting the IGBT operating module, a general switch module for controlling the conduction and cut-off of the IGBT, a first control switch module for controlling the opening and closing of the general switch module, a second control switch module for controlling the opening and closing of the general switch module, and a controller module for respectively controlling the opening and closing of the first control switch module and the second control switch module. Therefore, according to the IGBT driving circuit with the self-checking function, the first control switch module and the second control switch module control the closing and opening of the general switch module so that the conduction or the cut-off of the IGBT of the IGBT operating module 100 is controlled, and the IGBT operating module can be prevented from starting and damages if short circuit faults occur.
Description
Technical field
The utility model relates to self-checking circuit technical field, is specifically related to a kind of IGBT drive circuit with self-checking function.
Background technology
Electrical equipment by Electromagnetic Heating all has IGBT drive circuit, but existing IGBT drive circuit is in the time occurring short trouble, as caused short circuit etc. because of steam or insect, makes IGBT drive circuit works can cause the damage of IGBT drive circuit if start electrical equipment.
Utility model content
The purpose of this utility model is to provide a kind of IGBT drive circuit with self-checking function, is intended to solve that IGBT drive circuit starts in the time there is short trouble and the technical problem damaged.
In order to realize the purpose of this utility model, the utility model provides a kind of IGBT drive circuit with self-checking function, comprising:
There is the IGBT operational module of IGBT;
Detect the detection module of IGBT operational module;
Control total die sinking piece of IGBT turn-on and turn-off;
Control the first control switch module of total die sinking piece open and close;
Control the second control switch module of total die sinking piece open and close; And
Control respectively the controller module of the first control switch module and the second control switch module open and close;
When the equal closure of described controller module control the first control switch module and the second control switch module, the first control switch module and the total die sinking piece of the second control switch module controls closure, and whether the signal of the IGBT operational module of described controller module acquisition testing module detection is in running order to judge IGBT operational module.
Preferably, described total die sinking piece has NPN type triode Q123 and the positive-negative-positive triode Q124 of series connection, the C utmost point of NPN type triode Q123 meets voltage source V CC by resistance R 1234, the E utmost point of NPN type triode Q123 connects the E utmost point of positive-negative-positive triode Q124 and the G utmost point of IGBT, the C utmost point ground connection of positive-negative-positive triode Q124.
Preferably, described the first control switch module has NPN type triode Q125, the C utmost point of this NPN type triode Q125 connects the B utmost point of NPN type triode Q123 and positive-negative-positive triode Q124, the E utmost point ground connection of this NPN type triode Q125, the B utmost point of this NPN type triode Q125 connects direct voltage source by resistance R 1231.
Preferably, described the second control switch module has NPN type triode Q121 and NPN type triode Q122, the C utmost point of this NPN type triode Q122 connects the B utmost point of NPN type triode Q123 and positive-negative-positive triode Q124, the E utmost point ground connection of this NPN type triode Q122, the B utmost point of this NPN type triode Q122 meets voltage source V CC by resistance R 1221; The C utmost point of NPN type triode Q121 connects the B utmost point of NPN type triode Q122, the E utmost point ground connection of this NPN type triode Q121, and the B utmost point of this NPN type triode Q121 connects controller module by resistance R 1211.
Due to, the IGBT drive circuit that the utlity model has self-checking function is closed and open by the first control switch module and the total die sinking piece of the second control switch module controls, thereby control conducting or the shutoff of the IGBT of IGBT operational module, therefore the IGBT drive circuit that the utlity model has self-checking function can avoid starting IGBT operational module in the time there is short trouble, thereby can avoid the IGBT drive circuit with self-checking function to damage.
Brief description of the drawings
Fig. 1 is the block diagram that the utlity model has the IGBT drive circuit of self-checking function;
Fig. 2 is the circuit diagram that the utlity model has the IGBT drive circuit of self-checking function;
Fig. 3 is the self-inspection flow chart that the utlity model has the IGBT drive circuit of self-checking function.
Realization, functional characteristics and the advantage of the utility model object, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of IGBT drive circuit with self-checking function, with reference to Fig. 1, it has disclosed an embodiment of the IGBT drive circuit that the utlity model has self-checking function, in the present embodiment, the IGBT drive circuit that has a self-checking function comprises IGBT operational module 100, detection module 200, total die sinking piece 300, the first control switch module 400, the second control switch module 500 and controller module 600.
With reference to Fig. 2, IGBT operational module 100 passes through the conducting of IGBT or turn-offs the turn-on and turn-off in the loop to form between control port 1 and port 2.In the time of IGBT conducting, the conducting in the loop forming between port one and port 2, thus the alternating current of port one input charges to capacitor C 112; In the time that IGBT turn-offs, the shutoff in loop forming between port one and port 2, thus C112 and coil H1121 form charging and discharging circuit, therefore coil H1121 release heat and realize Electromagnetic Heating.
Detection module 200 detects the operating state of IGBT operational module 100, two test sides of this detection module 200 are connected to the two ends of the capacitor C 112 of IGBT operational module 100, thereby can judge that by the charge and discharge process of Detection capacitance C112 whether IGBT operational module 100 is in running order.
The NPN type triode Q123 of total die sinking piece 300 by series connection and positive-negative-positive triode Q124 control the turn-on and turn-off of the IGBT of IGBT operational module 100.The C utmost point of NPN type triode Q123 meets voltage source V CC by resistance R 1234, the E utmost point of NPN type triode Q123 connects the E utmost point of positive-negative-positive triode Q124 and the G utmost point of IGBT, the C utmost point ground connection of positive-negative-positive triode Q124, thus control NPN type triode Q123 and positive-negative-positive triode Q124 turn-on and turn-off are controlled conducting or the shutoff of IGBT.
The first control switch module 400 has NPN type triode Q125, the C utmost point of this NPN type triode Q125 connects the B utmost point of NPN type triode Q123 and positive-negative-positive triode Q124, the E utmost point ground connection of this NPN type triode Q125, the B utmost point of this NPN type triode Q125 connects 5V direct voltage source by resistance R 1231.
The second control switch module 500 has NPN type triode Q121 and NPN type triode Q122.The C utmost point of this NPN type triode Q122 connects the B utmost point of NPN type triode Q123 and positive-negative-positive triode Q124, the E utmost point ground connection of this NPN type triode Q122, and the B utmost point of this NPN type triode Q122 meets voltage source V CC by resistance R 1221.The C utmost point of NPN type triode Q121 connects the B utmost point of NPN type triode Q122, the E utmost point ground connection of this NPN type triode Q121, and the B utmost point of this NPN type triode Q121 connects controller module 600 by resistance R 1211.
Controller module 600 has the first control end 610 and the second control end 620 and the first collection terminal 630 and the second collection terminal 640, the first control end 610 connects the B utmost point of the NPN type triode Q125 of the first control switch module 400, and the second control end 620 connects the B utmost point of NPN type triode Q121 by the resistance R 1211 of the second control switch module 500.The first collection terminal 630 and the second collection terminal 640 two outputs of connection detection module 200 respectively, thus whether controller module 600 is in running order to judge IGBT operational module 100 by the signal of 200 liang of outputs of acquisition testing module.
The operation principle of IGBT drive circuit that the utlity model has self-checking function is as follows.
When the first control end 610 of controller module 600 is output as low level, NPN type triode Q125 turn-offs, and now the level of the B utmost point of NPN type triode Q123 is determined by the second control switch module 500, and the first control switch module 400 is opened; When the first control end 610 is output as high level, NPN type triode Q125 conducting, i.e. the first control switch module 400 closures, the very low level of B of NPN type triode Q123, positive-negative-positive triode Q124 conducting, the IGBT of IGBT operational module 100 turn-offs.
When the second control end 620 of controller module 600 is output as low level, NPN type triode Q121 turn-offs, NPN type triode Q122 conducting, the very low level of B of NPN type triode Q123, positive-negative-positive triode Q124 conducting, the IGBT of IGBT operational module 100 turn-offs, and the second control switch module 500 is opened; When the second control end 620 is output as high level, NPN type triode Q121 conducting, NPN type triode Q122 turn-offs, and the B utmost point level of NPN type triode Q123 is determined by the first control switch module 400, i.e. the second control switch module 500 closures.
Therefore, the utlity model has the IGBT drive circuit of self-checking function in normal operating conditions, when controller module 600 is controlled the first control switch module 400 and the second control switch module 500 equal closure, total die sinking piece 300 sides make the conducting of the IGBT of IGBT operational module 100 in closure state.
Refer to Fig. 3, the flow process that the IGBT drive circuit that the utlity model has self-checking function carries out self-inspection is as follows.
Controller module 600 is controlled the first control switch module 400 and is opened and control the second control switch module 500 closures, and controller module 600 whether detect IGBT operational module 100 by detection module 200 in running order; If detect, IGBT operational module 100 is in running order, controller module 600 is again controlled the first control switch module 400 and is opened and control the second control switch module 500 closures, and whether controller module 600 detects IGBT operational module 100 more in running order, if still detect, GBT operational module 100 is in running order, IGBT operational module 100 is in abnormal operating state, and controller module 600 is carried out report troubleshooting.
If controller module 600 is controlled the first control switch module 400 and is opened and control the second control switch module 500 when closed, after controller module 600 detects that IGBT operational module 100 is not in running order, it is closed and control the second control switch module 500 and open that controller module 600 is controlled the first control switch module 400, and controller module 600 whether detect IGBT operational module 100 by detection module 200 in running order; If detect, IGBT operational module 100 is in running order, controller module 600 is again controlled the first control switch module 400 closures and is controlled the second control switch module 500 and open, and whether controller module 600 detects IGBT operational module 100 in running order, if still detect, GBT operational module 100 is in running order, IGBT operational module 100 is in abnormal operating state, and controller module 600 is carried out report troubleshooting.
If controller module 600 is controlled the first control switch module 400 and is opened and control the second control switch module 500 when closed, after controller module 600 detects that IGBT operational module 100 is not in running order, controller module 600 is controlled the first control switch module 400 and all closures of the second control switch module 500, and whether controller module 600 detects IGBT operational module 100 by detection module 200 in running order, if after detecting that IGBT operational module 100 is in running order, controller module 600 judges IGBT operational module 100 for normal operating conditions and carries out next program, if detect, IGBT operational module 100 is not in running order, controller module 600 judges that IGBT operational module 100 breaks down and carries out report troubleshooting.
Because the IGBT drive circuit that the utlity model has self-checking function is controlled total die sinking piece 300 closures and opened by the first control switch module 400 and the second control switch module 500, thereby control conducting or the shutoff of the IGBT of IGBT operational module 100, therefore the IGBT drive circuit that the utlity model has self-checking function can avoid starting IGBT operational module 100 in the time there is short trouble, thereby can avoid the IGBT drive circuit with self-checking function to damage.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (4)
1. an IGBT drive circuit with self-checking function, is characterized in that, comprising:
There is the IGBT operational module of IGBT;
Detect the detection module of IGBT operational module;
Control total die sinking piece of IGBT turn-on and turn-off;
Control the first control switch module of total die sinking piece open and close;
Control the second control switch module of total die sinking piece open and close; And
Control respectively the controller module of the first control switch module and the second control switch module open and close;
When the equal closure of described controller module control the first control switch module and the second control switch module, the first control switch module and the total die sinking piece of the second control switch module controls closure, and whether the signal of the IGBT operational module of described controller module acquisition testing module detection is in running order to judge IGBT operational module.
2. the IGBT drive circuit with self-checking function as claimed in claim 1, it is characterized in that, described total die sinking piece has NPN type triode Q123 and the positive-negative-positive triode Q124 of series connection, the C utmost point of NPN type triode Q123 meets voltage source V CC by resistance R 1234, the E utmost point of NPN type triode Q123 connects the E utmost point of positive-negative-positive triode Q124 and the G utmost point of IGBT, the C utmost point ground connection of positive-negative-positive triode Q124.
3. the IGBT drive circuit with self-checking function as claimed in claim 2, it is characterized in that, described the first control switch module has NPN type triode Q125, the C utmost point of this NPN type triode Q125 connects the B utmost point of NPN type triode Q123 and positive-negative-positive triode Q124, the E utmost point ground connection of this NPN type triode Q125, the B utmost point of this NPN type triode Q125 connects direct voltage source by resistance R 1231.
4. the IGBT drive circuit with self-checking function as claimed in claim 3, it is characterized in that, described the second control switch module has NPN type triode Q121 and NPN type triode Q122, the C utmost point of this NPN type triode Q122 connects the B utmost point of NPN type triode Q123 and positive-negative-positive triode Q124, the E utmost point ground connection of this NPN type triode Q122, the B utmost point of this NPN type triode Q122 meets voltage source V CC by resistance R 1221; The C utmost point of NPN type triode Q121 connects the B utmost point of NPN type triode Q122, the E utmost point ground connection of this NPN type triode Q121, and the B utmost point of this NPN type triode Q121 connects controller module by resistance R 1211.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320660172.2U CN203708090U (en) | 2013-10-24 | 2013-10-24 | IGBT driving circuit with self-checking function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320660172.2U CN203708090U (en) | 2013-10-24 | 2013-10-24 | IGBT driving circuit with self-checking function |
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| Publication Number | Publication Date |
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| CN203708090U true CN203708090U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320660172.2U Expired - Fee Related CN203708090U (en) | 2013-10-24 | 2013-10-24 | IGBT driving circuit with self-checking function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067966A (en) * | 2020-09-19 | 2020-12-11 | 哈尔滨理工大学 | Simulation type IGBT failure mechanism analysis system |
-
2013
- 2013-10-24 CN CN201320660172.2U patent/CN203708090U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067966A (en) * | 2020-09-19 | 2020-12-11 | 哈尔滨理工大学 | Simulation type IGBT failure mechanism analysis system |
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| C14 | Grant of patent or utility model | ||
| 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: 20140709 Termination date: 20201024 |