CN104049166A - Rapid fault detection circuit based on pulse feedback - Google Patents
Rapid fault detection circuit based on pulse feedback Download PDFInfo
- Publication number
- CN104049166A CN104049166A CN201410305673.8A CN201410305673A CN104049166A CN 104049166 A CN104049166 A CN 104049166A CN 201410305673 A CN201410305673 A CN 201410305673A CN 104049166 A CN104049166 A CN 104049166A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power switching
- signal
- detection circuit
- quick detection
- 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.)
- Pending
Links
Landscapes
- Electronic Switches (AREA)
Abstract
The invention discloses a rapid fault detection circuit based on pulse feedback. The rapid fault detection circuit is used for detecting whether a power switch device in power electronic equipment and a driving loop of the power switch device fail or not. The rapid fault detection circuit is composed of an isolation feedback circuit, a signal conversion circuit and a comparison circuit. The isolation feedback circuit is used for detecting and feeding back the on-off state of the power switch device and compares the on-off state with PWM pulses sent out by the driving loop to determine whether the power switch device and the driving coop of the power switch device fail or not. Whether the power switch device in the power electronic equipment and the PWM driving loop of the power switch device fail or not can be rapidly and reliably detected through the rapid fault detection circuit, protection actions are performed in advance, and failure of the power switch device is reduced.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to a kind of fault quick detection circuit based on pulse feedback.
Background technology
Power Electronic Technique is as an emerging technology of rising in recent years, its progressive level that depends primarily on device for power switching, and device for power switching is as a kind of sensitive element, when there is the phenomena of the failure such as overcurrent, overvoltage, very easily damage, restricting to a certain extent the development of power electronics equipment.In recent years for making the more reliable and more stable operation of device for power switching, large quantity research has been done to the correlation technique of device for power switching by many research institutions and enterprise, the internal fault damaged for device for power switching is of paramount importance is to be also the most directly that the drive pulse signal that puts on device for power switching makes a mistake as lost pulse, pulse sequence mistake etc., thereby when drive pulse signal makes a mistake, will cause that device is out of control to be occurred the phenomenons such as over-voltage and over-current and damage device.The loop that produces drive pulse signal in power electronic equipment comprises signal transmission fiber, photoelectric switching circuit, driving circuit; if detect in time, drive loop to occur extremely and carry out corresponding protection action; can protect to a great extent the not damaged raising equipment of device for power switching, based on this, the present invention proposes a kind of fault quick detection circuit based on pulse feedback and whether normally work for detection of the driving loop of power electronic equipment.
Summary of the invention
The present invention proposes a kind of fault quick detection circuit based on pulse feedback in order to detect the device for power switching in power electronic equipment and to drive loop whether normally to work, and can be widely used in all kinds of power electronic equipments, and be applicable to all kind of modulations method.
The following scheme of the concrete employing of the present invention:
A fault quick detection circuit based on pulse feedback, consists of isolation feedback circuit, signaling conversion circuit, comparator circuit; It is characterized in that:
Described isolation feedback circuit is parallel to device for power switching two ends, when device for power switching is opened or when off state changes, isolation feedback circuit output changes thereupon;
Described signaling conversion circuit is for the signal of isolation feedback circuit output is converted to electric signal, and corresponding relation is device for power switching state when opening electric signal is high level, device for power switching state during for shutoff electric signal be low level;
Described comparator circuit receives the driving signal that the signal of described signaling conversion circuit output and the driving circuit of device for power switching send, and to this two-way input signal comparison, described two-way input signal recurs when inconsistent within the time of setting, judge and drive loop or device for power switching to break down, the reversion of comparator circuit output level.
Described driving loop comprises signal transmission fiber, driving circuit.
Described driving signal puts on device for power switching and controls it and open shutoff, and when driving signal to be high level, device for power switching is open-minded, and when driving signal to be low level, device for power switching turn-offs.
There is output level reversion in the comparator circuit of the described fault quick detection circuit based on pulse feedback, and output level is sent to power electronic equipment holding circuit to protect in time action after driving loop fault or device for power switching fault being detected.
The present invention has following useful technique effect:
Please write the beneficial effect that the present invention has with respect to prior art exactly
The described fault quick detection circuit based on pulse feedback can carry out closed loop detection to the driving loop of power electronic equipment and power device; can fast and reliable ground anticipation to loop fault, also send in time guard signal device protected, can greatly reduce the inefficacy of power device.
Accompanying drawing explanation
A kind of fault quick detection circuit based on pulse feedback of Fig. 1;
Fig. 2 isolation feedback circuit schematic diagram;
Fig. 3 signal contrast schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, a kind of fault quick detection circuit embodiment based on pulse feedback of the present invention's design is done to detailed illustrating.
The designed a kind of fault quick detection circuit based on pulse feedback of the present invention, is comprised of isolation feedback circuit, signaling conversion circuit, comparator circuit as shown in Figure 1, and tested circuit comprises Transmission Fibers, driving circuit, device for power switching.Isolation feedback circuit, signaling conversion circuit, comparator circuit connect in turn, the isolation feedback circuit of described fault quick detection circuit is parallel to device for power switching two ends, when device for power switching is opened or when off state changes, isolation feedback circuit output changes thereupon.The signaling conversion circuit of the described fault quick detection circuit based on pulse feedback is for being converted to electric signal by the signal of isolation feedback circuit output, corresponding relation is device for power switching state when opening electric signal is high level, and device for power switching state electric signal when turn-offing is low level.The comparator circuit of the described fault quick detection circuit based on pulse feedback is to the comparison of two-way input signal, and signal one is the signal of signaling conversion circuit output, the driving signal that signal two sends for driving circuit.Described driving signal puts on device for power switching and controls it and open shutoff, and when driving signal to be high level, device for power switching is open-minded, and when driving signal to be low level, device for power switching turn-offs.Described two-way input signal recurs when inconsistent within the time of setting, and judge and drive loop or device for power switching to break down, the reversion of comparator circuit output level, described driving loop comprises signal transmission fiber, driving circuit.
A kind of isolation feedback circuit schematic diagram of the fault quick detection circuit based on pulse feedback as shown in Figure 2, the isolation feedback circuit of testing circuit adopts optocoupler feedback circuit and is parallel to the device for power switching two ends of main circuit, and its output terminal is connected to the input end of signaling conversion circuit by optical fiber.When device for power switching is opened, the input side of optocoupler is low level, and now optocoupler is not opened and is output as low level signal, and corresponding optical fiber is output as and goes out; When device for power switching turn-offs, the input side of optocoupler is high level, and optocoupler is open-minded, is output as high level, and corresponding optical fiber is output as bright.
The signaling conversion circuit of the described fault quick detection circuit based on pulse feedback adopts photoelectric switching circuit in this example, the light signal of optocoupler feedback output is converted to electric signal, by the corresponding conversion of going out of optical fiber output, being high level, is low level by the bright corresponding conversion of optical fiber output.
The comparator circuit of the described fault quick detection circuit based on pulse feedback is to the comparison of two-way input signal, and signal one is the signal of photoelectric switching circuit output in example, the pwm pulse signal that signal two sends for controller.Described pwm pulse signal puts on device for power switching by driving circuit and controls it and open shutoff, and when pwm pulse signal is high level, device for power switching is open-minded, and when pwm pulse signal is low level, device for power switching turn-offs.Signal one and the once-existing t that prolongs of signal two as shown in Figure 3
delta=5us, thereby according to frequency of operation, one rational reduced time ts is set at this, and have ts>t
delta, as ts in the time waveform of signal one and signal two continue inconsistently, can this judge and drive loop and device for power switching operation irregularity, comparator circuit to export a guard signal to the holding circuit trigger protection action of device.
The present patent application people has done detailed explanation and description in conjunction with Figure of description to the present invention; but those skilled in the art should understand that; above embodiment is only the preferred embodiments of the invention; detailed explanation is just in order to help reader to understand better spirit of the present invention; and be not limiting the scope of the invention; on the contrary, any any improvement or modification of doing based on invention spirit of the present invention all should be within protection scope of the present invention.
Claims (4)
1. the fault quick detection circuit based on pulse feedback, is characterized in that, described quick detection circuit is linked in sequence and is formed by isolation feedback circuit, signaling conversion circuit, comparator circuit.
2. the fault quick detection circuit based on pulse feedback, consists of isolation feedback circuit, signaling conversion circuit, comparator circuit; It is characterized in that:
Described isolation feedback circuit is parallel to device for power switching two ends, when device for power switching is opened or when off state changes, isolation feedback circuit output changes thereupon;
Described signaling conversion circuit is for the signal of isolation feedback circuit output is converted to electric signal, and corresponding relation is device for power switching state when opening electric signal is high level, device for power switching state during for shutoff electric signal be low level;
Described comparator circuit receives the driving signal that the signal of described signaling conversion circuit output and the driving circuit of device for power switching send, and to this two-way input signal comparison, described two-way input signal recurs when inconsistent within the time of setting, judge and drive loop or device for power switching to break down, the reversion of comparator circuit output level.
3. fault quick detection circuit according to claim 2, is characterized in that:
Described driving signal puts on device for power switching and controls it and open shutoff, and when driving signal to be high level, device for power switching is open-minded, and when driving signal to be low level, device for power switching turn-offs.
4. fault quick detection circuit according to claim 3, is characterized in that:
There is output level reversion in the comparator circuit of the described fault quick detection circuit based on pulse feedback, and output level is sent to power electronic equipment holding circuit to protect in time action after driving signal fault or device for power switching fault being detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305673.8A CN104049166A (en) | 2014-06-30 | 2014-06-30 | Rapid fault detection circuit based on pulse feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305673.8A CN104049166A (en) | 2014-06-30 | 2014-06-30 | Rapid fault detection circuit based on pulse feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104049166A true CN104049166A (en) | 2014-09-17 |
Family
ID=51502258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410305673.8A Pending CN104049166A (en) | 2014-06-30 | 2014-06-30 | Rapid fault detection circuit based on pulse feedback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104049166A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649778A (en) * | 2018-07-19 | 2018-10-12 | 贵州电网有限责任公司 | A kind of pwm pulse detection circuit and detection method |
| CN109802581A (en) * | 2017-11-16 | 2019-05-24 | 核工业西南物理研究院 | A kind of power supply unit driving protection controller |
| CN110261752A (en) * | 2018-03-09 | 2019-09-20 | 深圳市禾望电气股份有限公司 | Semiconductor devices fault detection method and device, converter |
| CN111983447A (en) * | 2020-09-01 | 2020-11-24 | 深圳市英威腾电动汽车驱动技术有限公司 | Motor controller and fault detection method and circuit of three-phase bridge arm inverter circuit thereof |
| WO2021036958A1 (en) * | 2019-08-30 | 2021-03-04 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method for electric control device, and electric car |
| WO2021036959A1 (en) * | 2019-08-30 | 2021-03-04 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method for electric control device, and electric car |
| CN112698189A (en) * | 2019-10-22 | 2021-04-23 | 国家电网有限公司 | Circuit breaker fault detection method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703410A (en) * | 1986-04-07 | 1987-10-27 | Tektronix, Inc. | Power failure indicator |
| US5648920A (en) * | 1994-11-22 | 1997-07-15 | Texas Instruments Incorporated | Method and apparatus for deriving total lateral diffusion in metal oxide semiconductor transistors |
| WO1999030407A1 (en) * | 1997-12-08 | 1999-06-17 | Semi-Tech Design, Inc. | Method and circuit for detection of primary switches status in isolated dc/dc converters |
| CN2773702Y (en) * | 2004-04-29 | 2006-04-19 | 江苏省电力公司泰州供电公司 | Switch fault deteting controller of compensated capacitance |
| CN2884219Y (en) * | 2005-07-19 | 2007-03-28 | 洛阳智超机电科技有限公司 | On-line testing device for faults of three-phase full control bridge of crystal valve |
| CN201369668Y (en) * | 2008-12-03 | 2009-12-23 | 天津华云自控股份有限公司 | IGBT driving circuit driven by optical fiber through isolation |
-
2014
- 2014-06-30 CN CN201410305673.8A patent/CN104049166A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703410A (en) * | 1986-04-07 | 1987-10-27 | Tektronix, Inc. | Power failure indicator |
| US5648920A (en) * | 1994-11-22 | 1997-07-15 | Texas Instruments Incorporated | Method and apparatus for deriving total lateral diffusion in metal oxide semiconductor transistors |
| WO1999030407A1 (en) * | 1997-12-08 | 1999-06-17 | Semi-Tech Design, Inc. | Method and circuit for detection of primary switches status in isolated dc/dc converters |
| CN2773702Y (en) * | 2004-04-29 | 2006-04-19 | 江苏省电力公司泰州供电公司 | Switch fault deteting controller of compensated capacitance |
| CN2884219Y (en) * | 2005-07-19 | 2007-03-28 | 洛阳智超机电科技有限公司 | On-line testing device for faults of three-phase full control bridge of crystal valve |
| CN201369668Y (en) * | 2008-12-03 | 2009-12-23 | 天津华云自控股份有限公司 | IGBT driving circuit driven by optical fiber through isolation |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802581A (en) * | 2017-11-16 | 2019-05-24 | 核工业西南物理研究院 | A kind of power supply unit driving protection controller |
| CN110261752A (en) * | 2018-03-09 | 2019-09-20 | 深圳市禾望电气股份有限公司 | Semiconductor devices fault detection method and device, converter |
| CN108649778A (en) * | 2018-07-19 | 2018-10-12 | 贵州电网有限责任公司 | A kind of pwm pulse detection circuit and detection method |
| WO2021036958A1 (en) * | 2019-08-30 | 2021-03-04 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method for electric control device, and electric car |
| WO2021036959A1 (en) * | 2019-08-30 | 2021-03-04 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method for electric control device, and electric car |
| US11435389B2 (en) | 2019-08-30 | 2022-09-06 | Contemporary Amperex Technology Co., Limited | Electrical control device detection circuit, detection method, and electric vehicle |
| US12025666B2 (en) | 2019-08-30 | 2024-07-02 | Contemporary Amperex Technology Co., Limited | Detection circuit and detection method of electrical control device, and electric vehicle |
| CN112698189A (en) * | 2019-10-22 | 2021-04-23 | 国家电网有限公司 | Circuit breaker fault detection method and system |
| CN112698189B (en) * | 2019-10-22 | 2023-08-15 | 国家电网有限公司 | Breaker fault detection method and system |
| CN111983447A (en) * | 2020-09-01 | 2020-11-24 | 深圳市英威腾电动汽车驱动技术有限公司 | Motor controller and fault detection method and circuit of three-phase bridge arm inverter circuit thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104049166A (en) | Rapid fault detection circuit based on pulse feedback | |
| CN103928909B (en) | The short-circuit protection method of Switching Power Supply fast and reliable and circuit | |
| CN205787014U (en) | A kind of D.C. contactor main contacts testing circuit | |
| CN108075630B (en) | Power switch control circuit and its open circuit method for detecting | |
| CN102565662B (en) | State detection device for high-potential thyristor | |
| CN203405528U (en) | Grounding detection apparatus | |
| CN203587754U (en) | Thyristor trigger pulse fault detection circuit | |
| CN203941249U (en) | A kind of lightning protection detection module | |
| CN203278204U (en) | IGBT module parallel-connection protection circuit applied to high-power inverter | |
| CN202929127U (en) | Circuit for detecting three-phase electricity phase sequence and open phase | |
| CN108649778A (en) | A kind of pwm pulse detection circuit and detection method | |
| CN103825260A (en) | Power supply surge protective device | |
| CN208691136U (en) | A kind of pwm pulse detection circuit | |
| CN102957133A (en) | IGBT (Insulated Gate Bipolar Translator) over-current withdraw protection circuit of frequency converter | |
| CN103731018B (en) | Inversion module active driving protection device | |
| CN105021930A (en) | Converter valve reverse recovery phase protective characteristic test method and corresponding system | |
| CN203166465U (en) | Overvoltage protection circuit | |
| CN204463336U (en) | Based on the board antiwithdrawal device of optical signal detecting | |
| CN205123231U (en) | High -temperature early warning surge protector | |
| CN205429688U (en) | Track traffic safety door electromagnetic lock short -circuit protection circuit and system | |
| CN204205547U (en) | Overcurrent protection circuit for high-power supply input end | |
| CN102931631A (en) | Output earth leakage protection device for high-voltage and direct-current power supply system | |
| CN203849387U (en) | Switch power supply repetition switch testing circuit of power supply adapter | |
| CN110867825A (en) | Overvoltage protection circuit of constant power output power supply | |
| CN207426965U (en) | A kind of high-voltage DC power supply energy with failure feedback is released control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |
|
| WD01 | Invention patent application deemed withdrawn after publication |