CN101609127A - A kind of relay fault detecting circuit - Google Patents

A kind of relay fault detecting circuit Download PDF

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Publication number
CN101609127A
CN101609127A CNA2009100413605A CN200910041360A CN101609127A CN 101609127 A CN101609127 A CN 101609127A CN A2009100413605 A CNA2009100413605 A CN A2009100413605A CN 200910041360 A CN200910041360 A CN 200910041360A CN 101609127 A CN101609127 A CN 101609127A
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CN
China
Prior art keywords
module
relay
control
circuit
voltage
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CNA2009100413605A
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Chinese (zh)
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CN101609127B (en
Inventor
房振
王健全
陈东明
常志强
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美的集团有限公司
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Priority to CN 200910041360 priority Critical patent/CN101609127B/en
Publication of CN101609127A publication Critical patent/CN101609127A/en
Application granted granted Critical
Publication of CN101609127B publication Critical patent/CN101609127B/en

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Abstract

The present invention is the relay field, is specially a kind of relay fault detecting circuit, comprises power module, relay module that low-voltage dc power supply and high-voltage ac power can be provided, also comprises control module and signal feedback module; Control module, relay module provide low-voltage dc power supply by power module respectively, and control module is connected with the control end of relay module, and by the drive control signal of control module the break-make of relay module switch terminals are controlled; The High Level AC Voltage source output terminal of relay module switch terminals one termination power module, the other end is the load link, described load link is connected with control module by signal feedback circuit, and control module is by relatively drive control signal and feedback signal are carried out fault detect and control to relay module.The present invention can can't open the fault that maybe can't turn-off to relay and judge, can also carry out fault detect to a plurality of relays simultaneously, and circuit design is simple, and is easy to use.

Description

A kind of relay fault detecting circuit

Technical field

The present invention relates to the relay field, be specifically related to a kind of relay fault detecting circuit.

Background technology

In the operating circuit of load, control relay circuit is a topworks, open or turn-off relay according to the control signal that receives, thereby reach the purpose of control load operation, as the heated condition of control heater, rotary state of control fan electromotor or the like.In use, two kinds of faults generally can appear in relay: the one, and but relay receives and opens signal can't carry out that relay contact can't adhesive, keeps off state always; The 2nd, but relay receives cut-off signals but can't carry out, and the relay contact adhesion can't disconnect, and keeps opening state always.For first kind of fault, its consequence is that load can not be started working, and can't normally use, but can not bring danger; Second kind of fault then can cause load to continue to carry out not controlled work, continues that heating does not stop etc. as well heater, tends to cause major accident or even catastrophic incident to take place.

In the load circuit that uses relay, all there are not the circuit of design specialized or the malfunction that module detects relay at present, therefore in actual use, the potential safety hazard that controller can't effectively be discerned the state of relay and avoid causing because of the relay fault.And the manufacturer is for the general method of relay and power supply, pilot lamp being connected, detected pilot lamp light on and off state under the state that relay is opened successively that adopts of Performance Detection of relay, this testing circuit can only detect relay and whether be in opening state and make circuit turn-on, can not detect relay and whether can normally open, turn-off between the two states and change, and this testing circuit be suitable on the specific product relay is carried out real-time fault detect.

Summary of the invention

The object of the present invention is to provide a kind of failure detector circuit of relay, both can be used for the performance test before relay uses, also can be used for using on the product of relay, relay is carried out real-time fault detect, and can also carry out the relay fault detecting circuit of fault detect simultaneously to a plurality of relays.

In order to realize above-mentioned technical purpose, the present invention includes following technical characterictic: a kind of relay fault detecting circuit, comprise power module, relay module that low-voltage dc power supply and high-voltage ac power can be provided, it is characterized in that also comprising control module and signal feedback module; Control module, relay module provide low-voltage dc power supply by power module respectively, and control module is connected with the control end of relay module, and by the drive control signal of control module the break-make of relay module switch terminals are controlled; The High Level AC Voltage source output terminal of relay module switch terminals one termination power module, the other end is the load link, described load link is connected with control module by signal feedback circuit, and control module is by relatively drive control signal and feedback signal are carried out fault detect and control to relay module.The present invention carries out signal feedback by the end that the switch terminals to relay module connects load, and with the feedback signal and drive signal compare, thereby judge the failure condition of relay, therefore the present invention has the function that the relay real time fail detects, but also can realize the fault detection capability of a plurality of relays by a plurality of signal feedback inputs.

Further, described control module comprises control part and comparing section; The control part output terminal connects relay module; The comparing section input end connects the output terminal of signal feedback module and control part; The output terminal of comparing section connects the input end of control part.

With further, described signal feedback module comprises pressure regulator T51, rectification circuit, bleeder resistance R51 and filtering circuit, rectification circuit and bleeder resistance R51 are connected between two output terminals of pressure regulator T51 successively, and filtering circuit is connected in parallel on bleeder resistance R51 two ends.Being in series with dividing potential drop in the signal feedback module between rectification circuit and the bleeder resistance R51 makes up with resistance or resistance.Rectification circuit in the signal feedback module is commutation diode or full bridge rectifier.When circuit is connected with load and is duty, signal feedback circuit carries out the high-voltage alternating electric signal to feed back to control module after the low pressure arrangement is handled, because the voltage range of control module after to step-down has requirement, signal feedback module among the present invention has been passed through the utilization of pressure regulator T51 and divider resistance or divider resistance combination, and the magnitude of voltage that guarantees output is in the input voltage range of control module.

Further, described power module comprises high-voltage ac power end, decompression rectifier filter circuit 11, the first voltage stabilizer IC11, capacitor C 14, the second voltage stabilizer IC12, capacitor C 15, capacitor C 16, the high-voltage ac power end with connect the first voltage stabilizer IC11 and the second voltage stabilizer IC12 successively, the output terminal shunt capacitance C14 of the first voltage stabilizer IC11 after decompression rectifier filter circuit 11 is connected; The output terminal of the second voltage stabilizer IC12 is parallel with capacitor C 15 and capacitor C 16.

Further, described relay module comprises relay K 31 and driving circuit, and driving circuit comprises triode Q31, is connected resistance R 31 between the base stage of described triode Q31 and the collector, resistance in series R32 between base stage and the control module, emitter connects relay K 31.

The present invention compared with prior art, an end that connects load by the switch terminals to relay module carries out signal feedback, and with the feedback signal and drive signal compare, whether operate thereby can judge relay, realize whether out of order judgement of relay according to the control of drive signal.Because feedback signal of the present invention is fed back in real time, therefore the present invention can implement fault detect to relay, it simultaneously both can be the inspection before the work, also can be when being connected in the load, in the time need detecting, only a plurality of feedback modules need be set signal feedback is got final product to control module the fault of a plurality of relays.Circuit design of the present invention is simple, and is easy to use.

Description of drawings

Fig. 1 is the module principle figure of the embodiment of the invention;

Fig. 2 is the circuit diagram of the embodiment of the invention;

Fig. 3 is the circuit diagram of a kind of embodiment that retrofits of signal feedback module;

Fig. 4 is the circuit diagram of the another kind of remodeling of signal feedback module embodiment.

Embodiment

As shown in Figure 1, the failure detector circuit of present embodiment relay comprises: power module 1, control module 2, relay module 3, load blocks 4 and signal feedback module 5, and wherein load blocks 4 and signal feedback module 5 are connected in parallel; Power module 1 is responsible for providing low-voltage dc power supply to control module 2, relay module 3, is responsible for providing high-voltage ac power to load blocks 4, signal feedback module 5, and is controlled the switching of these AC power by relay module 3; Control module 2 comprises control part 21 and comparing section 22, and control part 21 output terminals connect relay module 3; Comparing section 22 input ends connect the output terminal of signal feedback module 5 and control part 21; The output terminal of comparing section 22 connects the input end of control part 21.Control part 21 is responsible for to relay module 3 and comparing section 22 output drive control signal, comparing section 22 is responsible for the drive control signal that control part 21 is exported and the feedback signal that receives from signal feedback module 5 compares, and comparative result is fed back to control part 21; Load blocks 4 is responsible for finishing the execution of drive control signal final purpose; Signal feedback module 5 is responsible for gathering drive control signal by the signal of relay module 3 implementation status and to control module 2 feedbacks.

As shown in Figure 2, in the failure detector circuit of present embodiment relay, power module 1 is made up of 220V high-voltage ac power, decompression rectifier filter circuit 11, the first voltage stabilizer IC11, capacitor C 14, the second voltage stabilizer IC12, capacitor C 15, capacitor C 16, first voltage stabilizer IC11 output 12V low-voltage DC, second voltage stabilizer IC12 output 5V low-voltage DC.The high-voltage ac power end with connect the first voltage stabilizer IC11 and the second voltage stabilizer IC12 successively, the output terminal shunt capacitance C14 of the first voltage stabilizer IC11 after decompression rectifier filter circuit 11 is connected; The output terminal of the second voltage stabilizer IC12 is parallel with capacitor C 15 and capacitor C 16.

Control module 2 is integrated little process chip IC21,5V low-voltage dc power supply by second voltage stabilizer IC12 output provides working power, be responsible for drive control signal to relay module 3 output control relay K31 duties, the feedback signal of received signal feedback module 5 output, and drive control signal and feedback signal compared.The output high level indicates to open relay in the present embodiment, and output low level indicates to turn-off relay; Receive high level and represent that relay is open-minded, receive low level and represent that relay turn-offs.

Relay module 3 is made up of relay K 31, diode D31 and driving circuit, is connected resistance R 31 between triode Q31 base stage and the collector in the driving circuit, resistance in series R32 between base stage and the control module 2, and emitter connects relay K 31.

Relay K 31 provides working power by the 12V low-voltage DC of first voltage stabilizer IC11 output, and diode D31 protective relay K31 avoids breakdown.

Load blocks 4 drives the well heater W41 that carries out work for being subjected to relay, signal feedback module 5 is connected in parallel on load blocks 4 two ends, be connected in the 220V High Level AC Voltage power supply switching of opening, turn-offing direct control load module 4 and signal feedback module 5 of relay K 31 with relay K 31.

Signal feedback module 5 comprises pressure regulator T51, commutation diode D51, bleeder resistance R51 and is connected in parallel on filter capacitor C51, the C52 at bleeder resistance R51 two ends that the voltage of bleeder resistance R51 is exported to control module 2 as feedback signal.When relay K 31 is opened, signal feedback module 5 output high level; When relay K 31 is turn-offed, signal feedback module 5 output low levels.Pressure regulator T51 output voltage is 3V in the present embodiment.

Under the normal state of relay, back controller 21 output high level drive control signal power on, driving circuit makes relay K 31 open-minded, signal feedback module 5 is connected high-voltage ac power, high-voltage ac power is converted to the 3V direct current through pressure regulator T51, diode D51, exports the feedback signal of 3V direct currents (high level) then after filtering to control part 21; Controller 21 output low level drive control signal, driving circuit are turn-offed relay K 31, and the power end of signal feedback module 5 can not be connected high-voltage ac power, and signal feedback module 5 is to the feedback signal of comparing section 22 output low levels.

Under the malfunction that the contact occurring at relay can't adhesive, can not open, even controller 21 output high level signals, relay K 31 also is in off state, and the power end of signal feedback module 5 can not be connected high-voltage ac power, and signal feedback module 5 is to comparing section 22 output low levels.

Under malfunction that the contact adhesion can't disconnect, can not turn-off appears in relay, even controller 21 output low level signals, relay K 31 also is in opening state, and signal feedback module 5 is connected high-voltage ac power, to comparing section 22 output 3V direct currents (high level).

Therefore, the comparing section 22 of control module compares the drive control signal of control part 21 outputs and the feedback signal of reception, if two signals logically are consistent, illustrate that relay carried out corresponding action according to drive control signal, judge that relay is working properly; If two signals logically are not consistent, relay is described not according to drive control signal execution corresponding action, operation irregularity judges that relay breaks down, control part 21 can carry out fault alarm according to this judged result.According to actual needs, can in circuit, connect a plurality of relays to be detected and corresponding signal feedback module.

The foregoing description testing circuit is applicable to the malfunction that detects relay on the specific product in real time, if just detect the performance condition of relay, can not want load blocks 4 in the testing circuit, and this does not influence the accuracy of feedback signal and fault judgement.

According to the foregoing description content, if the output voltage of the pressure regulator T51 that selects is not suitable for control module, can make following remodeling: resistance in series is carried out dividing potential drop between commutation diode D51 and bleeder resistance R51, makes the signal of output be suitable for control module 2.Show that as Fig. 3 the output voltage of pressure regulator T51 is 12V, pressure regulator T51 connects with resistance R52, bleeder resistance R51 with diode D51, dividing potential drop, and the resistance of resistance R 51 is 1k Ω, and the resistance of resistance R 52 is 3k Ω, and output signal is 3V, is suitable for control module 2.Or show as Fig. 4, the output voltage of pressure regulator T51 is 12V, pressure regulator T51 connects with diode D51, resistance R 53, resistance R 54, in parallel behind the bleeder resistance R51 resistance in series R52 with resistance R 54, the resistance of resistance R 51, R52, R53, R54 is 1k Ω, output signal is 3V, is suitable for control module 2.

According to the foregoing description content, replace the commutation diode D51 in the signal feedback module 5 also should belong to protection scope of the present invention with full bridge rectifier.

Claims (7)

1, a kind of relay fault detecting circuit comprises power module (1), relay module (3) that low-voltage dc power supply and high-voltage ac power can be provided, it is characterized in that also comprising control module (2) and signal feedback module (5);
Control module (2), relay module (3) provide low-voltage dc power supply by power module (1) respectively, control module (2) is connected with the control end of relay module (3), and by the drive control signal of control module (2) break-make of relay module (3) switch terminals is controlled;
The High Level AC Voltage source output terminal of relay module (3) switch terminals one termination power module (1), the other end is load (a 4) link, described load link is connected with control module (2) by signal feedback circuit (5), and control module (2) is by relatively drive control signal and feedback signal are carried out fault detect and control to relay module (3).
2, relay fault detecting circuit according to claim 1 is characterized in that described control module (2) comprises control part (21) and comparing section (22); Control part (21) output terminal connects relay module (3); Comparing section (22) input end connects the output terminal of signal feedback module (5) and control part (21); The output terminal of comparing section (22) connects the input end of control part (21).
3, relay fault detecting circuit according to claim 1, it is characterized in that described signal feedback module (5) comprises pressure regulator T51, rectification circuit, bleeder resistance R51 and filtering circuit, rectification circuit and bleeder resistance R51 are connected between two output terminals of pressure regulator T51 successively, and filtering circuit is connected in parallel on bleeder resistance R51 two ends.
4, relay fault detecting circuit according to claim 3 is characterized in that being in series with dividing potential drop between middle rectification circuit of signal feedback module (5) and the bleeder resistance R51 makes up with resistance or resistance.
5,, it is characterized in that the rectification circuit in the signal feedback module (5) is commutation diode or full bridge rectifier according to claim 3 or 4 each described relay fault detecting circuits.
6, relay fault detecting circuit according to claim 1, it is characterized in that described power module (1) comprises high-voltage ac power end, decompression rectifier filter circuit 11, the first voltage stabilizer IC11, capacitor C 14, the second voltage stabilizer IC12, capacitor C 15, capacitor C 16, the high-voltage ac power end with connect the first voltage stabilizer IC11 and the second voltage stabilizer IC12 successively, the output terminal shunt capacitance C14 of the first voltage stabilizer IC11 after decompression rectifier filter circuit 11 is connected; The output terminal of the second voltage stabilizer IC12 is parallel with capacitor C 15 and capacitor C 16.
7, relay fault detecting circuit according to claim 1, it is characterized in that described relay module (3) comprises relay K 31 and driving circuit, driving circuit comprises triode Q31, be connected resistance R 31 between the base stage of described triode Q31 and the collector, resistance in series R32 between base stage and the control module (2), emitter connects relay K 31.
CN 200910041360 2009-07-24 2009-07-24 Relay fault detecting circuit CN101609127B (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200910041360 CN101609127B (en) 2009-07-24 2009-07-24 Relay fault detecting circuit

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CN101609127A true CN101609127A (en) 2009-12-23
CN101609127B CN101609127B (en) 2012-12-05

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Cited By (23)

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CN101867228A (en) * 2010-07-22 2010-10-20 上海思源弘瑞自动化有限公司 Outlet loop online detection system for relay protection device
CN101980418A (en) * 2010-11-11 2011-02-23 上海思源弘瑞自动化有限公司 System for detecting secondary wiring of relay protection system in transformer substation on line
CN102269790A (en) * 2011-04-22 2011-12-07 上海恒动汽车电池有限公司 Fault diagnosis circuit for high-voltage relay of power storage battery
CN102540070A (en) * 2012-02-08 2012-07-04 广东易事特电源股份有限公司 Control and detection circuit for four relays and detection method thereof
CN102565691A (en) * 2011-12-14 2012-07-11 广州三晶电气有限公司 Relay failure detection device and method for grid-connected inverter
CN102628925A (en) * 2012-04-24 2012-08-08 杭州浙大桑尼能源科技有限公司 Method and device for detecting faults of relays of photovoltaic inverter
CN102798817A (en) * 2011-05-26 2012-11-28 比亚迪股份有限公司 Relay fault detection circuit and fault detection method thereof
CN102818992A (en) * 2012-08-07 2012-12-12 宁波吉江汽车制造有限责任公司 Relay detection device
CN103149530A (en) * 2013-01-25 2013-06-12 合肥市英唐科技有限公司 Relay tester
CN103278769A (en) * 2013-06-27 2013-09-04 北京铁路信号有限公司 Detection device for relay
CN103364720A (en) * 2013-07-16 2013-10-23 赵明 Relay cabinet detector for airplane
CN103424690A (en) * 2012-05-22 2013-12-04 Ls产电株式会社 Apparatus for diagnosing relay contact of electric vehicle and method thereof
CN103503290A (en) * 2010-06-04 2014-01-08 Abb公司 Detection of welded switch contacts in a line converter system
CN103713258A (en) * 2012-10-08 2014-04-09 力铭科技股份有限公司 Relay failure detection circuit
CN103913703A (en) * 2013-01-08 2014-07-09 广州汽车集团股份有限公司 Start stop system and device and method for diagnosing faults of relays of start stop device
CN104237609A (en) * 2013-06-06 2014-12-24 重庆金美通信有限责任公司 Fault diagnosis method for direct-current brushed motor drive circuit
CN105021979A (en) * 2015-06-08 2015-11-04 江苏林洋电子股份有限公司 A built-in relay state detection circuit
CN105301489A (en) * 2015-11-06 2016-02-03 许继电源有限公司 DC contactor contact detection device
CN105424997A (en) * 2015-10-23 2016-03-23 江苏林洋能源股份有限公司 Relay with state detection circuit and anti-electricity-theft method
CN106772013A (en) * 2016-12-29 2017-05-31 北京经纬恒润科技有限公司 A kind of relay fault detection method and system
CN109073703A (en) * 2016-11-25 2018-12-21 株式会社Lg化学 System for diagnosing the insulation component in BMS
CN109347313A (en) * 2018-10-25 2019-02-15 大禹电气科技股份有限公司 Bypass module for high voltage transducer power unit
CN110262352A (en) * 2019-07-03 2019-09-20 中车株洲电力机车有限公司 The judgment method and device of miniature circuit breaker state

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CN1996031A (en) * 2006-01-05 2007-07-11 苏州宇达电通有限公司 Fault detection system and method therefor
US7298148B2 (en) * 2006-03-02 2007-11-20 Emerson Electric Co. Relay controller
CN201215788Y (en) * 2008-05-21 2009-04-01 深圳和而泰智能控制股份有限公司 Driving circuit for electric relay
CN201274022Y (en) * 2008-09-09 2009-07-15 美的集团有限公司 Voltage stabilizing negative feedback circuit
CN201438207U (en) * 2009-07-24 2010-04-14 美的集团有限公司 Relay fault detection circuit

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CN103503290A (en) * 2010-06-04 2014-01-08 Abb公司 Detection of welded switch contacts in a line converter system
CN103503290B (en) * 2010-06-04 2016-06-15 Abb公司 The detection of welding switch contact in circuit converter system
CN101867228B (en) * 2010-07-22 2012-05-09 上海思源弘瑞自动化有限公司 Outlet loop online detection system for relay protection device
CN101867228A (en) * 2010-07-22 2010-10-20 上海思源弘瑞自动化有限公司 Outlet loop online detection system for relay protection device
CN101980418A (en) * 2010-11-11 2011-02-23 上海思源弘瑞自动化有限公司 System for detecting secondary wiring of relay protection system in transformer substation on line
CN101980418B (en) * 2010-11-11 2012-09-26 上海思源弘瑞自动化有限公司 System for detecting secondary wiring of relay protection system in transformer substation on line
CN102269790A (en) * 2011-04-22 2011-12-07 上海恒动汽车电池有限公司 Fault diagnosis circuit for high-voltage relay of power storage battery
CN102798817A (en) * 2011-05-26 2012-11-28 比亚迪股份有限公司 Relay fault detection circuit and fault detection method thereof
CN102798817B (en) * 2011-05-26 2015-08-26 比亚迪股份有限公司 A kind of relay fault detecting circuit and fault detection method thereof
CN102565691A (en) * 2011-12-14 2012-07-11 广州三晶电气有限公司 Relay failure detection device and method for grid-connected inverter
CN102540070A (en) * 2012-02-08 2012-07-04 广东易事特电源股份有限公司 Control and detection circuit for four relays and detection method thereof
CN102540070B (en) * 2012-02-08 2013-11-13 广东易事特电源股份有限公司 Control and detection circuit for four relays and detection method thereof
CN102628925A (en) * 2012-04-24 2012-08-08 杭州浙大桑尼能源科技有限公司 Method and device for detecting faults of relays of photovoltaic inverter
US9052364B2 (en) 2012-05-22 2015-06-09 Lsis Co., Ltd. Apparatus for diagnosing relay contact of electric vehicle and method thereof
CN103424690A (en) * 2012-05-22 2013-12-04 Ls产电株式会社 Apparatus for diagnosing relay contact of electric vehicle and method thereof
CN103424690B (en) * 2012-05-22 2016-06-29 Ls产电株式会社 For diagnosing the devices and methods therefor of the high-voltage relay contact of electric vehicle
CN102818992A (en) * 2012-08-07 2012-12-12 宁波吉江汽车制造有限责任公司 Relay detection device
CN102818992B (en) * 2012-08-07 2015-06-24 浙江南车电车有限公司 Relay detection device
CN103713258A (en) * 2012-10-08 2014-04-09 力铭科技股份有限公司 Relay failure detection circuit
CN103913703A (en) * 2013-01-08 2014-07-09 广州汽车集团股份有限公司 Start stop system and device and method for diagnosing faults of relays of start stop device
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CN103149530B (en) * 2013-01-25 2015-01-21 合肥市英唐科技有限公司 Relay tester
CN104237609A (en) * 2013-06-06 2014-12-24 重庆金美通信有限责任公司 Fault diagnosis method for direct-current brushed motor drive circuit
CN103278769B (en) * 2013-06-27 2016-05-11 北京铁路信号有限公司 A kind of checkout gear of relay
CN103278769A (en) * 2013-06-27 2013-09-04 北京铁路信号有限公司 Detection device for relay
CN103364720A (en) * 2013-07-16 2013-10-23 赵明 Relay cabinet detector for airplane
CN105021979A (en) * 2015-06-08 2015-11-04 江苏林洋电子股份有限公司 A built-in relay state detection circuit
CN105424997A (en) * 2015-10-23 2016-03-23 江苏林洋能源股份有限公司 Relay with state detection circuit and anti-electricity-theft method
CN105301489A (en) * 2015-11-06 2016-02-03 许继电源有限公司 DC contactor contact detection device
CN105301489B (en) * 2015-11-06 2018-05-29 许继电源有限公司 A kind of D.C. contactor contact detection device
CN109073703A (en) * 2016-11-25 2018-12-21 株式会社Lg化学 System for diagnosing the insulation component in BMS
CN106772013A (en) * 2016-12-29 2017-05-31 北京经纬恒润科技有限公司 A kind of relay fault detection method and system
CN106772013B (en) * 2016-12-29 2019-08-06 北京经纬恒润科技有限公司 A kind of relay fault detection method and system
CN109347313A (en) * 2018-10-25 2019-02-15 大禹电气科技股份有限公司 Bypass module for high voltage transducer power unit
CN109347313B (en) * 2018-10-25 2020-08-04 大禹电气科技股份有限公司 Bypass module for power unit of high-voltage frequency converter
CN110262352A (en) * 2019-07-03 2019-09-20 中车株洲电力机车有限公司 The judgment method and device of miniature circuit breaker state

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