CN104901281A - Driving protection circuit based on IGBT inverter circuit applications - Google Patents
Driving protection circuit based on IGBT inverter circuit applications Download PDFInfo
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- CN104901281A CN104901281A CN201410832898.9A CN201410832898A CN104901281A CN 104901281 A CN104901281 A CN 104901281A CN 201410832898 A CN201410832898 A CN 201410832898A CN 104901281 A CN104901281 A CN 104901281A
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Abstract
The invention discloses a driving protection circuit based on IGBT inverter circuit applications, which comprises an isolation power supply module, a logic control chip, a signal trigger, a driving protection module and a general power supply module in communication control with the isolation power supply module, the logic control chip, the signal trigger, and the driving protection module respectively, wherein the isolation power supply module comprises a U phase isolation power supply module, a V phase isolation power supply module and a W phase isolation power supply module; the logic control chip is composed of a single chip microcomputer or a CPLD; the driving protection module comprises a U phase driving protection module, a V driving protection module and a W driving protection module, and the driving protection modules are respectively connected onto an output port. Driving signals are detected through the single chip microcomputer or the CPLD, high level and low level of the signals are precisely calculated, protection signals fed back from a high-speed optical coupler are checked again, on and off of the IGBT module are controlled after anti-interference processing is carried out, a filter time is determined precisely, interference is reduced, the IGBT protection range is shortened, the purpose of precisely protecting the IGBT can be achieved, quickness and effectiveness of IGBT overcurrent protection can be ensured, and error actions of the protection circuit can be avoided.
Description
Technical field
The present invention relates to IGBT circuit field, particularly relate to a kind of Drive Protecting Circuit based on the application of IGBT inverter circuit.
Background technology
As shown in Figures 1 and 2, recent two decades comes, and along with the progress of power electronic technology, Digital Signal Processing, frequency converter, servo-driver, wind power generation, solar energy power generating etc. obtain fast development.In these products, IGBT inverter circuit is the of paramount importance part of core the most, carries the conversion of high voltage, big current.In practical application, load occurs that situation that is aging, short circuit happens occasionally.Therefore, IGBT Converting Unit has burnt into one of most common failure, and the driving of IGBT and protective circuit be one of emphasis becoming design also.At present, application-specific integrated circuit (ASIC) is usually adopted to drive and protect IGBT, the PC929 etc. of A316J, SHARP company of such as AVAGO company, shown in typical application circuit following Fig. 1, Fig. 2 both at home and abroad.A316J, PC929 inside is integrated with isolation optocoupler, raster data model and tube voltage drop (Vce) observation circuit, when drive singal is effective, if the too high just trigger protection of Vce detected.There is high dv/dt to bring interference because IGBT has on off delay and main circuit, add RC filtering in circuit to prevent observation circuit misoperation.In practical application, observation circuit misoperation be avoided often to lose rapidity, the validity of overcurrent protection.Trace it to its cause and be that it is an analog quantity comparison circuit, the necessary value of RC is enough large, and guarantee is when the interference signal that experience one is high, and comparator is not triggered.And RC value is too large, cause again overcurrent protection dull, the duration of short circuit that usual IGBT can bear only has 5-10uS.
, if the rapidity improving IGBT overcurrent protection, often there is protective circuit misoperation, cause equipment downtime in current conventional IGBT Drive Protecting Circuit.Conversely, reduce the sensitivity of overcurrent protection, although equipment mistakenly stop machine can be avoided, often occur the fault that IGBT burns.
Summary of the invention
The object of the present invention is to provide a kind of Drive Protecting Circuit based on the application of IGBT inverter circuit, detect drive singal, IGBT conduction voltage drop state by a slice single-chip microcomputer or CPLD, by digital filtering, judge IGBT whether overcurrent.The rapidity of IGBT overcurrent protection, validity can be ensured, protective circuit misoperation can be avoided again.
For effectively solving the problems of the technologies described above, the technical scheme that the present invention takes is as follows:
Based on the Drive Protecting Circuit of IGBT inverter circuit application, comprise insulating power supply module, logic control chip, signal trigger, driving protection module and be communicated with it the general supply module of control respectively; Wherein, described insulating power supply module comprises the isolated power module of U, the isolated power module of V and the isolated power module of W; described logic control chip is made up of single-chip microcomputer or CPLD; described driving protection module comprises U phase and drives protection module, V to drive protection module and W to drive protection module composition, and described driving protection module is connected to output respectively and removes port.
Especially, described general supply module also comprises control panel and the earth terminal be attached thereto, RST input and bus output port.
Especially, described general supply module built-in 5V power supply interface, GND and OC are communicated with described logic control chip corresponding 5V power supply interface, GND and OC, and built-in OC, UP, UN, VP, VN, WP, WN pin of described general supply module is connected to OC, UP, UN, VP, VN, WP, WN incoming end of described logic control chip after being communicated with by the built-in pin of described signal trigger.
Especially; described general supply module provides 100V port of powering to connect the isolated power module of U, the isolated power module of V and the isolated power module of W in described insulating power supply module respectively, and described logic control chip and the insulating power supply module U phase be communicated with respectively in described driving protection module drives the isolated power module of protection module, V and the isolated power module of W.
Especially, described driving protection module is made up of the UN connecting circuit of parallel combination, USN connecting circuit, UP connecting circuit, USP connecting circuit, wherein, the PC assembled unit that described UN connecting circuit and UP connecting circuit are connected by sequential combination respectively, three segments combined electric capacity, triode, parallel gate resistance, voltage stabilizing didoe and series resistance are formed, three sections of outputs after described syllogic combination capacitor, upper-lower section connects shunt capacitance, and upper end electric capacity composes in parallel by two groups, stage casing contact resistance is also communicated with setting; After described USN connecting circuit and USP connecting circuit connect PC composition element by the first resistance and with the earthed circuit of the first electric capacity respectively, two-way input connects the second resistance and the 3rd resistance respectively, its second resistance connects hypomere path and connects electric capacity after voltage stabilizing didoe controlling element, connects the 4th resistance and diode after its 3rd resistance direct bout second resistive path.
Especially; described UN connecting circuit and the connection of USN connecting circuit output arrange IGBT circuit; described UP connecting circuit and the connection of USP connecting circuit arrange another IGBT circuit, and described Drive Protecting Circuit multiplexing protective circuit is identical with the isolated protective circuit of described U.
Especially, described logic control chip one end contact resistance R7 connects triode Q1, its triode Q1 upper end is communicated with OC, lower end ground connection earth resistance R8, the described logic control chip other end connects No. five condenser networks and the first series resistance and the second series resistance, and described logic control chip comprises the earth terminal of a voltage input end and capacitor.
Beneficial effect of the present invention is: the Drive Protecting Circuit based on the application of IGBT inverter circuit provided by the invention; drive singal is detected by a single-chip microcomputer or CPLD; after the low and high level accurate Calculation of signal; reexamine the guard signal that high speed photo coupling feedback is come; and carry out anti-interference process and controlled IGBT module break-make afterwards; accurately determine that filtering time reduces interference; thus reduce the object that IGBT protection range reaches accurately protection IGBT; the rapidity of IGBT overcurrent protection, validity can be ensured, protective circuit misoperation can be avoided again.
Below in conjunction with accompanying drawing, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is driving and the protective circuit schematic diagram of existing IGBT;
Fig. 2 is driving and the another schematic diagram of protective circuit of existing IGBT;
Fig. 3 is the Drive Protecting Circuit theory of constitution figure based on the application of IGBT inverter circuit of the present invention;
Fig. 4 is of the present invention based on U phase Drive Protecting Circuit schematic diagram in the Drive Protecting Circuit of IGBT inverter circuit application;
Fig. 5 is of the present invention based on logic control chip composition schematic diagram in the Drive Protecting Circuit of IGBT inverter circuit application.
Embodiment
Embodiment 1:
In the present embodiment, the composition original paper of described conventional known structure does not do mark display in the drawings.
As shown in Figure 3, the disclosed Drive Protecting Circuit based on the application of IGBT inverter circuit of the present embodiment, based on the Drive Protecting Circuit of IGBT inverter circuit application, comprise insulating power supply module, logic control chip, signal trigger, driving protection module and be communicated with it the general supply module of control respectively; Wherein, described insulating power supply module comprises the isolated power module of U, the isolated power module of V and the isolated power module of W; described logic control chip is made up of single-chip microcomputer or CPLD; described driving protection module comprises U phase and drives protection module, V to drive protection module and W to drive protection module composition, and described driving protection module is connected to output respectively and removes port.
Described general supply module also comprises control panel and the earth terminal be attached thereto, RST input and bus output port.Described general supply module built-in 5V power supply interface, GND and OC are communicated with described logic control chip corresponding 5V power supply interface, GND and OC, and built-in OC, UP, UN, VP, VN, WP, WN pin of described general supply module is connected to OC, UP, UN, VP, VN, WP, WN incoming end of described logic control chip after being communicated with by the built-in pin of described signal trigger.
As shown in Figures 4 and 5; described general supply module provides 100V port of powering to connect the isolated power module of U, the isolated power module of V and the isolated power module of W in described insulating power supply module respectively, and described logic control chip and the insulating power supply module U phase be communicated with respectively in described driving protection module drives the isolated power module of protection module, V and the isolated power module of W.Described driving protection module is made up of the UN connecting circuit of parallel combination, USN connecting circuit, UP connecting circuit, USP connecting circuit, wherein, the PC assembled unit that described UN connecting circuit and UP connecting circuit are connected by sequential combination respectively, three segments combined electric capacity, triode, parallel gate resistance, voltage stabilizing didoe and series resistance are formed, three sections of outputs after described syllogic combination capacitor, upper-lower section connects shunt capacitance, and upper end electric capacity composes in parallel by two groups, stage casing contact resistance is also communicated with setting; After described USN connecting circuit and USP connecting circuit connect PC composition element by the first resistance and with the earthed circuit of the first electric capacity respectively, two-way input connects the second resistance and the 3rd resistance respectively, its second resistance connects hypomere path and connects electric capacity after voltage stabilizing didoe controlling element, connects the 4th resistance and diode after its 3rd resistance direct bout second resistive path.
Described UN connecting circuit and the connection of USN connecting circuit output arrange IGBT circuit, and described UP connecting circuit and the connection of USP connecting circuit arrange another IGBT circuit, and described Drive Protecting Circuit multiplexing protective circuit is identical with the isolated protective circuit of described U.Described logic control chip one end contact resistance R7 connects triode Q1, its triode Q1 upper end is communicated with OC, lower end ground connection earth resistance R8, the described logic control chip other end connects No. five condenser networks and the first series resistance and the second series resistance, and described logic control chip comprises the earth terminal of a voltage input end and capacitor.
Applicant states, person of ordinary skill in the field is on the basis of above-described embodiment, by above-described embodiment step, combined with the technical scheme of summary of the invention part, thus the new method produced, also be one of record scope of the present invention, the application, for making specification simple and clear, no longer enumerates other execution mode of these steps.
The technology path being different from prior art in the present embodiment is:
1, adopt voltage stabilizing didoe+transistor, compare the conduction voltage drop of IGBT.
2, adopt rapid light coupling, comparative result (higher than set point or lower than set point) isolation is passed to logical circuit.
3, adopt single-chip microcomputer or other Digital Logic, according to drive singal and comparative result, after digital filtering, judge IGBT whether overcurrent, if there is overcurrent to occur, trigger governor circuit closedown IGBT.
The present embodiment technical scheme and technique effect are different from conventional art and are:
1. detect drive singal, IGBT conduction voltage drop state by sheet single-chip microcomputer or CPLD, by digital filtering, judge IGBT whether overcurrent; The rapidity of IGBT overcurrent protection, validity can be ensured, protective circuit misoperation can be avoided again.
2. detect drive singal by sheet single-chip microcomputer or CPLD; after the low and high level accurate Calculation of signal; reexamine the guard signal that high speed photo coupling feedback is come; and carry out anti-interference process and controlled IGBT module break-make afterwards; accurately determine that filtering time reduces interference, thus reduce the object that IGBT protection range reaches accurately protection IGBT.
The another statement of applicant, the present invention illustrates implementation method of the present invention and apparatus structure by above-described embodiment, but the present invention is not limited to above-mentioned execution mode, does not namely mean that the present invention must rely on said method and structure could be implemented.Person of ordinary skill in the field should understand, any improvement in the present invention, replaces and the interpolation of step, concrete way choice etc., all drop within protection scope of the present invention and open scope implementation method equivalence selected by the present invention.
The present invention is not limited to above-mentioned execution mode, and all employings and analog structure of the present invention and method thereof realize all execution modes of the object of the invention all within scope.
Claims (7)
1. based on the Drive Protecting Circuit of IGBT inverter circuit application, it is characterized in that, comprise insulating power supply module, logic control chip, signal trigger, driving protection module and be communicated with it the general supply module of control respectively; Wherein, described insulating power supply module comprises the isolated power module of U, the isolated power module of V and the isolated power module of W; described logic control chip is made up of single-chip microcomputer or CPLD; described driving protection module comprises U phase and drives protection module, V to drive protection module and W to drive protection module composition, and described driving protection module is connected to output respectively and removes port.
2. the Drive Protecting Circuit based on the application of IGBT inverter circuit according to claim 1, it is characterized in that, described general supply module also comprises control panel and the earth terminal be attached thereto, RST input and bus output port.
3. the Drive Protecting Circuit based on the application of IGBT inverter circuit according to claim 1; it is characterized in that; described general supply module built-in 5V power supply interface, GND and OC are communicated with described logic control chip corresponding 5V power supply interface, GND and OC, and built-in OC, UP, UN, VP, VN, WP, WN pin of described general supply module is connected to OC, UP, UN, VP, VN, WP, WN incoming end of described logic control chip after being communicated with by the built-in pin of described signal trigger.
4. the Drive Protecting Circuit based on the application of IGBT inverter circuit according to claim 1; it is characterized in that; described general supply module provides 100V port of powering to connect the isolated power module of U, the isolated power module of V and the isolated power module of W in described insulating power supply module respectively, and described logic control chip and the insulating power supply module U phase be communicated with respectively in described driving protection module drives the isolated power module of protection module, V and the isolated power module of W.
5. the Drive Protecting Circuit based on the application of IGBT inverter circuit according to claim 1, it is characterized in that, described driving protection module is by the UN connecting circuit of parallel combination, USN connecting circuit, UP connecting circuit, USP connecting circuit forms, wherein, the PC assembled unit that described UN connecting circuit and UP connecting circuit are connected by sequential combination respectively, three segments combined electric capacity, triode, parallel gate resistance, voltage stabilizing didoe and series resistance are formed, three sections of outputs after described syllogic combination capacitor, upper-lower section connects shunt capacitance, and upper end electric capacity composes in parallel by two groups, stage casing contact resistance is also communicated with setting, after described USN connecting circuit and USP connecting circuit connect PC composition element by the first resistance and with the earthed circuit of the first electric capacity respectively, two-way input connects the second resistance and the 3rd resistance respectively, its second resistance connects hypomere path and connects electric capacity after voltage stabilizing didoe controlling element, connects the 4th resistance and diode after its 3rd resistance direct bout second resistive path.
6. the Drive Protecting Circuit based on the application of IGBT inverter circuit according to claim 5; it is characterized in that; described UN connecting circuit and the connection of USN connecting circuit output arrange IGBT circuit; described UP connecting circuit and the connection of USP connecting circuit arrange another IGBT circuit, and described Drive Protecting Circuit multiplexing protective circuit is identical with the isolated protective circuit of described U.
7. the Drive Protecting Circuit based on the application of IGBT inverter circuit according to claim 1; it is characterized in that; described logic control chip one end contact resistance R7 connects triode Q1; its triode Q1 upper end is communicated with OC; lower end ground connection earth resistance R8; the described logic control chip other end connects No. five condenser networks and the first series resistance and the second series resistance, and described logic control chip comprises the earth terminal of a voltage input end and capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832898.9A CN104901281A (en) | 2014-12-29 | 2014-12-29 | Driving protection circuit based on IGBT inverter circuit applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832898.9A CN104901281A (en) | 2014-12-29 | 2014-12-29 | Driving protection circuit based on IGBT inverter circuit applications |
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| CN104901281A true CN104901281A (en) | 2015-09-09 |
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| CN201410832898.9A Pending CN104901281A (en) | 2014-12-29 | 2014-12-29 | Driving protection circuit based on IGBT inverter circuit applications |
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| US20100315024A1 (en) * | 2009-06-11 | 2010-12-16 | Kabushiki Kaisha Toyota Jidoshokki | Inverter device |
| CN102594104A (en) * | 2012-02-22 | 2012-07-18 | 武汉正远铁路电气有限公司 | Digital intelligent driving device of high-power IGBT (insulated gate bipolar translator) |
| CN103802841A (en) * | 2012-11-05 | 2014-05-21 | 中国北车股份有限公司 | Electric locomotive traction control unit and control method |
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- 2014-12-29 CN CN201410832898.9A patent/CN104901281A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050190094A1 (en) * | 2002-04-17 | 2005-09-01 | Danfoss Drives A/S | Method for measuring currents in a motor controller and motor controller using such method |
| CN101055991A (en) * | 2006-04-14 | 2007-10-17 | 广东工业大学 | 380V system active power filtering device |
| CN1917369A (en) * | 2006-08-30 | 2007-02-21 | 广州金升阳科技有限公司 | IGBT drive, and process method for driving signal |
| CN101249582A (en) * | 2008-03-28 | 2008-08-27 | 北京工业大学 | Complete digital PWM controlled AC pulse MIG welding system |
| US20100315024A1 (en) * | 2009-06-11 | 2010-12-16 | Kabushiki Kaisha Toyota Jidoshokki | Inverter device |
| CN102594104A (en) * | 2012-02-22 | 2012-07-18 | 武汉正远铁路电气有限公司 | Digital intelligent driving device of high-power IGBT (insulated gate bipolar translator) |
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| PB01 | Publication | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiao Guoxun Inventor after: Zhang Yong Inventor before: Xiao Guoxun |
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| COR | Change of bibliographic data | ||
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| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150909 |
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| WD01 | Invention patent application deemed withdrawn after publication |