CN204302422U - The failure detector of the IGBT of wind electric converter and failure protecting device - Google Patents
The failure detector of the IGBT of wind electric converter and failure protecting device Download PDFInfo
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- CN204302422U CN204302422U CN201520006491.0U CN201520006491U CN204302422U CN 204302422 U CN204302422 U CN 204302422U CN 201520006491 U CN201520006491 U CN 201520006491U CN 204302422 U CN204302422 U CN 204302422U
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Abstract
The utility model provides failure detector and the failure protecting device of a kind of IGBT of wind electric converter, wherein failure detector comprises: signal deteching circuit, threshold set circuit, comparison circuit and latch cicuit, signal deteching circuit and threshold set circuit are connected with two inputs of comparison circuit respectively, the output of comparison circuit is connected with latch cicuit, and signal deteching circuit is for detecting the current signal of IGBT or voltage signal or temperature signal; Threshold set circuit is for setting the protection threshold value of current signal or voltage signal or temperature signal; Comparison circuit is used for comparing the protection threshold value of current signal or voltage signal or temperature signal and current signal or voltage signal or temperature signal, exports compare result signal; The compare result signal that latch cicuit is used for comparison circuit exports latches.The utility model realizes fault detect to IGBT, to take corresponding safeguard measure for the master control system of wind electric converter.
Description
Technical field
The utility model relates to a kind of failure detector and failure protecting device, particularly relates to failure detector and the failure protecting device of a kind of IGBT of wind electric converter.
Background technology
In wind electric converter, when IGBT (insulated gate bipolar transistor) works, need to measure IGBT voltage, IGBT electric current, IGBT temperature signal, and these signal feedback are used for realizing IGBT switch motion to control system, realize the power electronic equipment of different structure.When these measuring-signals of IGBT occur abnormal, such as, when electric voltage over press, overcurrent, temperature excess temperature, need to carry out safeguard measure to IGBT, not so will damage IGBT for a long time, and the power generation operation of current transformer is impacted.
Utility model content
Embodiment of the present utility model provides failure detector and the failure protecting device of the IGBT of wind electric converter, with can Timeliness coverage IGBT exist fault, to take corresponding safeguard measure.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
A failure detector of the IGBT of wind electric converter, comprising: signal deteching circuit, threshold set circuit, comparison circuit and latch cicuit,
Described signal deteching circuit and described threshold set circuit are connected with two inputs of described comparison circuit respectively, and the output of described comparison circuit is connected with described latch cicuit,
Described signal deteching circuit is for detecting the current signal of described IGBT or voltage signal or temperature signal;
Described threshold set circuit is for setting the protection threshold value of described current signal or described voltage signal or described temperature signal;
Described comparison circuit is used for comparing the protection threshold value of current signal or voltage signal or temperature signal and described current signal or described voltage signal or described temperature signal, exports compare result signal;
Described latch cicuit is used for latching the compare result signal that described comparison circuit exports.
Further, described threshold set circuit comprises Programmable Logic Device and digital to analog converter, and the output of described digital to analog converter is connected with the input of described comparison circuit,
Described Programmable Logic Device is used for setting described protection threshold value in the mode of digital signal, the protection threshold value of described digital to analog converter for by the protection threshold transition of described digital signal form being analog signal form, and is input to the input of described comparator.
Further, connected by bus between described Programmable Logic Device and described digital to analog converter.
A failure protecting device of the IGBT of wind electric converter, comprising: the failure detector of IGBT and IGBT locking pulse circuit,
The input of described IGBT locking pulse circuit is connected with the output of the latch cicuit of the failure detector of described IGBT, carries out pulse blocking for the compare result signal according to described latch circuit latches to described IGBT.
Further, the failure protecting device of the IGBT of described wind electric converter also comprises the fault processing module be arranged in the master control system of wind electric converter,
Described fault processing module is used for reading described compare result signal from described latch cicuit, and carries out error protection process according to described compare result signal to described IGBT.
The fault detect of the IGBT of wind electric converter of the present utility model, protective circuit; by sensed current signal or voltage signal or temperature signal etc.; and passing threshold initialization circuit sets corresponding threshold value; and then whether utilize comparison circuit to carry out decision signal abnormal; thus the fault detect realized IGBT; and can by signal latch, to take corresponding safeguard measure for the master control system of current transformer.
Accompanying drawing explanation
Fig. 1 is the structural representation of the failure detector of the IGBT of the utility model embodiment;
Fig. 2 is the structural representation of the failure protecting device of the IGBT of the utility model embodiment.
Embodiment
The utility model embodiment provides fault detect, the protective circuit of a kind of IGBT of wind electric converter; its know-why is by sensed current signal or voltage signal or temperature signal etc.; and passing threshold initialization circuit sets corresponding threshold value; and then whether utilize comparison circuit to carry out decision signal abnormal; thus the fault detect realized IGBT; and can by signal latch, to take corresponding safeguard measure for the master control system of current transformer.
Below in conjunction with accompanying drawing, the fault detect of the IGBT of the wind electric converter that the utility model embodiment provides, protective circuit are described in detail.
Fig. 1 is the structural representation of the failure detector of the IGBT of the utility model embodiment.As shown in Figure 1, this failure detector 200 comprises: signal deteching circuit 210, threshold set circuit 220, comparison circuit 230 and latch cicuit 240.
Signal deteching circuit 210 and threshold set circuit 220 are connected (such as with two inputs of comparison circuit 230 respectively, as shown in Figure 1, signal deteching circuit 210 can be connected with the positive input of comparison circuit 230, and threshold set circuit 220 is connected with the negative input of comparison circuit 230), the output of comparison circuit 230 is connected with latch cicuit 240.
Signal deteching circuit 210 is for detecting the current signal of IGBT, voltage signal or temperature signal; Threshold set circuit 220 is for setting the protection threshold value of current signal or voltage signal or temperature signal; Comparison circuit 230, for comparing the protection threshold value of current signal, voltage signal or temperature signal and current signal or voltage signal or temperature signal, exports compare result signal; Latch cicuit 240 latches for the compare result signal exported comparison circuit 230.
Here, comparison circuit 230 can have various ways, such as comparison circuit 230 is comparator, the protection threshold value of current signal or voltage signal or temperature signal and current signal or voltage signal or temperature signal is compared, when current signal or voltage signal or temperature signal are less than the protection threshold value of current signal or voltage signal or temperature signal, such as protect threshold value to be 8V, output logic 0 level, represent and do not exceed protection restriction; When current signal or voltage signal or temperature signal are greater than the protection threshold value of current signal or voltage signal or temperature signal, output logic 1 level, represents and exceedes protection restriction.
Latch cicuit 240 is latched by compare result signal, because the compare result signal of comparison circuit 230 output is through disappearing after a while, needs latch cicuit 240 to be latched by compare result signal, to avoid the disappearance of compare result signal.
Further, threshold set circuit 220 comprises Programmable Logic Device 221 and digital to analog converter 222, and the output of digital to analog converter 222 is connected with the input of comparison circuit 230.
Programmable Logic Device 221 for setting protection threshold value in the mode of digital signal, the protection threshold value of digital to analog converter 222 for by the protection threshold transition of digital signal form being analog signal form, and be input to the input of comparator.
Here; Programmable Logic Device 221 can be connected by bus with digital to analog converter 222; Programmable Logic Device 221 refers to the device that can be used for programming; protection threshold value is set in the mode of digital signal; the protection threshold transition set in the mode of digital signal is with the protection threshold value of analog signaling setting by digital to analog converter 222; for different defencive functions, can arrange and protect threshold value accordingly.Programmable Logic Device 221 can also be connected with external computer by communication interface, is set protection threshold value by human-computer interaction interface.
The utility model embodiment provides the failure detector of a kind of IGBT of wind electric converter; by sensed current signal or voltage signal or temperature signal etc.; and passing threshold initialization circuit sets corresponding threshold value; and then whether utilize comparison circuit to carry out decision signal abnormal; thus the fault detect realized IGBT; and can by signal latch, to take corresponding safeguard measure for the master control system of current transformer.
Fig. 2 is the structural representation of the failure protecting device of the IGBT of the utility model embodiment.As shown in Figure 2, failure protecting device comprises: the failure detector 200 of IGBT and the locking pulse circuit 310 of IGBT,
The input of locking pulse circuit 310 of IGBT is connected with the output of the latch cicuit of the failure detector of IGBT, carries out pulse blocking for the compare result signal according to latch circuit latches to IGBT.Locking pulse circuit 310 is such as the switching circuit of the signal input part being arranged on IGBT, when detecting that the signal level latched in latch cicuit is signal level (being such as high level) representing IGBT exception, then cut-off switch, make IGBT signal end not have pwm signal to input, thus IGBT is quit work.
Further, also comprise the fault processing module 320 be arranged in the master control system of wind electric converter, fault processing module 320 for reading compare result signal from latch cicuit 240, and carries out error protection process according to compare result signal to IGBT.Here error protection process refers to the control that current transformer master control system carries out from the angle of whole current transformer, the logic control of such as current transformer and shutting down control and with the connection control etc. of load.
The utility model embodiment provides the failure protecting device of a kind of IGBT of wind electric converter; pulse blocking is carried out by locking pulse circuit compared result signal; and carry out error protection process by fault processing module compared result signal, thus realize the error protection to IGBT and converter system.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (5)
1. a failure detector of the IGBT of wind electric converter, is characterized in that, comprising: signal deteching circuit, threshold set circuit, comparison circuit and latch cicuit,
Described signal deteching circuit and described threshold set circuit are connected with two inputs of described comparison circuit respectively, and the output of described comparison circuit is connected with described latch cicuit,
Described signal deteching circuit is for detecting the current signal of described IGBT or voltage signal or temperature signal;
Described threshold set circuit is for setting the protection threshold value of described current signal or described voltage signal or described temperature signal;
Described comparison circuit is used for comparing the protection threshold value of current signal or voltage signal or temperature signal and described current signal or described voltage signal or described temperature signal, exports compare result signal;
Described latch cicuit is used for latching the compare result signal that described comparison circuit exports.
2. the failure detector of the IGBT of wind electric converter according to claim 1, is characterized in that, described threshold set circuit comprises Programmable Logic Device and digital to analog converter, and the output of described digital to analog converter is connected with the input of described comparison circuit,
Described Programmable Logic Device is used for setting described protection threshold value in the mode of digital signal, the protection threshold value of described digital to analog converter for by the protection threshold transition of described digital signal form being analog signal form, and is input to the input of described comparator.
3. the failure detector of the IGBT of wind electric converter according to claim 2, is characterized in that, is connected between described Programmable Logic Device and described digital to analog converter by bus.
4. a failure protecting device of the IGBT of wind electric converter, is characterized in that, comprising: the failure detector of the IGBT as described in as arbitrary in claims 1 to 3 and the locking pulse circuit of IGBT,
The input of the locking pulse circuit of described IGBT is connected with the output of the latch cicuit of the failure detector of described IGBT, carries out pulse blocking for the compare result signal according to described latch circuit latches to described IGBT.
5. the failure protecting device of the IGBT of wind electric converter according to claim 4, is characterized in that, also comprises the fault processing module be arranged in the master control system of wind electric converter,
Described fault processing module is used for reading described compare result signal from described latch cicuit, and carries out error protection process according to described compare result signal to described IGBT.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006491.0U CN204302422U (en) | 2015-01-06 | 2015-01-06 | The failure detector of the IGBT of wind electric converter and failure protecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520006491.0U CN204302422U (en) | 2015-01-06 | 2015-01-06 | The failure detector of the IGBT of wind electric converter and failure protecting device |
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| CN204302422U true CN204302422U (en) | 2015-04-29 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807159A (en) * | 2016-03-14 | 2016-07-27 | 广东明阳龙源电力电子有限公司 | IGBT power module unit load testing method |
| CN108051234A (en) * | 2017-12-26 | 2018-05-18 | 北京金风科创风电设备有限公司 | Fan fault detection method and device, converter and computer readable storage medium |
| CN108804365A (en) * | 2017-04-26 | 2018-11-13 | 上海芯龙半导体技术股份有限公司 | The integrated circuit of realization temperature switch function on universal serial bus |
| CN110488206A (en) * | 2019-08-13 | 2019-11-22 | 科华恒盛股份有限公司 | A kind of failure monitoring system |
| CN111474438A (en) * | 2020-05-11 | 2020-07-31 | 苏州信义大时代网络科技有限公司 | Reliability failure analysis and detection method for electronic product |
| CN111900699A (en) * | 2020-08-03 | 2020-11-06 | 珠海格力电器股份有限公司 | Sampling protection device, frequency converter and sampling protection method thereof |
-
2015
- 2015-01-06 CN CN201520006491.0U patent/CN204302422U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807159A (en) * | 2016-03-14 | 2016-07-27 | 广东明阳龙源电力电子有限公司 | IGBT power module unit load testing method |
| CN105807159B (en) * | 2016-03-14 | 2019-03-08 | 广东明阳龙源电力电子有限公司 | A kind of IGBT power module unit band load detection method |
| CN108804365A (en) * | 2017-04-26 | 2018-11-13 | 上海芯龙半导体技术股份有限公司 | The integrated circuit of realization temperature switch function on universal serial bus |
| CN108051234A (en) * | 2017-12-26 | 2018-05-18 | 北京金风科创风电设备有限公司 | Fan fault detection method and device, converter and computer readable storage medium |
| CN110488206A (en) * | 2019-08-13 | 2019-11-22 | 科华恒盛股份有限公司 | A kind of failure monitoring system |
| CN111474438A (en) * | 2020-05-11 | 2020-07-31 | 苏州信义大时代网络科技有限公司 | Reliability failure analysis and detection method for electronic product |
| CN111900699A (en) * | 2020-08-03 | 2020-11-06 | 珠海格力电器股份有限公司 | Sampling protection device, frequency converter and sampling protection method thereof |
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