CN106877291A - A kind of safe torque breaking circuit and system - Google Patents

A kind of safe torque breaking circuit and system Download PDF

Info

Publication number
CN106877291A
CN106877291A CN201710264681.6A CN201710264681A CN106877291A CN 106877291 A CN106877291 A CN 106877291A CN 201710264681 A CN201710264681 A CN 201710264681A CN 106877291 A CN106877291 A CN 106877291A
Authority
CN
China
Prior art keywords
circuit
module
sto
buffer
input
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.)
Granted
Application number
CN201710264681.6A
Other languages
Chinese (zh)
Other versions
CN106877291B (en
Inventor
姚瑱
徐璐
徐瑜
杜鑫
范仁凯
李文龙
陈富
徐小军
钱巍
徐正华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Estun Automation Co Ltd
Original Assignee
NANJING ESTUN AUTOMATIC CONTROL TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NANJING ESTUN AUTOMATIC CONTROL TECHNOLOGY Co Ltd filed Critical NANJING ESTUN AUTOMATIC CONTROL TECHNOLOGY Co Ltd
Priority to CN201710264681.6A priority Critical patent/CN106877291B/en
Publication of CN106877291A publication Critical patent/CN106877291A/en
Application granted granted Critical
Publication of CN106877291B publication Critical patent/CN106877291B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Safety Devices In Control Systems (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses a kind of safe torque breaking circuit and system, including power module, input module, performing module and STO diagnostic modules.Input module uses two-way Redundancy Design with performing module.Output channel uses two-pass design, and the dynamic detection of output module is realized under zero vector state, prevents failure from adding up, and improves diagnosis coverage rate.Input channel uses two-way Redundancy Design, the test burst pulse for having certain phase difference by sending two-way to realize the dynamic monitoring of input module, improves diagnosis coverage rate.

Description

A kind of safe torque breaking circuit and system
Technical field
The present invention relates to Power Electronic Circuit field, more particularly to a kind of safe torque shut-off(Safe Torque Off, STO)Circuit and safe torque turning off system.
Background technology
In the prior art, in order to prevent motor accidental activation, or avoid generation with the accident of damage to person, people are directed to The products such as frequency converter, motor servo driver propose STO functions.The function be prevented from driver produced in motor turn Square, is adapted in the security system for include machine.The IEC61508 standards that International Electrotechnical Commission formally issues(《Electrical/electronic/ The functional safety of programmable electronic security system》), propose safety integrity level(SIL)Concept weigh security function The degree of reliability, and 4 grades are divided into, the highest ranking of industrial circle is SIL3.The STO functions of meeting SIL3 being capable of band Carry out security higher, be the trend of future development.
Two-way Redundancy Design being used current STO functional circuits and system, to improve security of system more.Even if however, double Road is designed, in prolonged continuous operation, it is also possible to because failure accumulation causes security function to fail.Especially since temporarily When the accident such as over-pressed, short-circuit or sporadic component defect trigger the possibility of failure high, it is therefore desirable to security function The each several part of circuit is controlled to be periodically detected in time.
Chinese invention patent application file CN105576952A, discloses a kind of STO functional circuits of two-way Redundancy Design, Including signaling conversion circuit, photoelectric coupled circuit, filter circuit etc., realize being realized while STO functions the self-inspection of partial circuit.This Though self-inspection of the technical scheme comprising STO functional circuits, pertains only to input channel, output channel, power module are not directed to, and Its input channel self-inspection is to send same detection burst pulse to two-way input channel by diagnosis unit to carry out self-inspection, the method without The intersection short circuit of method detection input channel, diagnosis coverage rate is not high.And power module is important in STO functional circuits one Point, the diagnosis to power module is very important.
Chinese utility model patent file CN205319683U, discloses a kind of safe torque turn-off function circuit, its skill Art scheme includes two-way STO signal inputs, and by EMC circuits, under-voltage protecting circuit, light-coupled isolation, control Shang Qiao is with respectively The IGBT of bridge drives the break-make of PWM power supplys, carrys out safe shutdown moment of torsion.It utilizes transistor base, optical coupling secondary edges, voltage-stabiliser tube in string It is coupled structure, realizes the under-voltage protection function of power supply, but the not defencive function such as power supply overvoltage, excessively stream, overload.And its design is defeated Enter passage not diagnose, output channel only has static diagnostic, i.e. diagnosis coverage rate is not low, and part of module is not diagnosed, it is overall SIL grades are not high.
Chinese utility model patent file CN205170091U, discloses a kind of safe torque turn-off function circuit and elevator Safety control system, the emphasis of its technical scheme is application of the STO technologies in elevator safety control system, and traditional is connect Tentaculum mode is compared, and has many advantages, combines the control system of elevator industry, emphasizes a kind of overall design.Its system layer On face, when performing security function, by safety return circuit so that band-type brake dead electricity, motor locking, while the auxiliary contact bullet of double embrace lock Open, cause frequency converter safety return circuit to be input into and disconnect, trigger frequency converter security function.In its frequency converter aspect, doubleway output has deficient Pressure protection, can respectively cut off bridge power supply on IGBT, lower bridge power supply, meanwhile, the state for exporting electronic switch is also patrolled by a series of Whether the connection of volume final control control power supply to be, if power supply is obstructed, will dead electricity safety.This patent only refers to examining for power supply Disconnected and only under-voltage without other diagnosis, diagnosis coverage rate is not high.
The content of the invention
In order to solve prior art presence above-mentioned technical problem, the present invention propose a kind of safe torque breaking circuit and System, its input module uses two-way Redundancy Design with performing module, improves system reliability.To input module and execution mould Block takes the method for dynamic detection to ensure that module has diagnosis coverage rate higher.
In order to realize goal of the invention, the technical scheme for being used is the present invention:
A kind of safe torque breaking circuit, including power module, input module A, input module B, performing module A, performing module B And STO diagnostic modules.Wherein, input module A and performing module A is concatenated, and constitutes first passage, input module B and execution mould Block B is concatenated, and constitutes second channel(Constitute binary-channel redundancy design).
The STO diagnostic modules include diagnosis unit, signaling conversion circuit A, signaling conversion circuit B, undervoltage detection circuit, Over-voltage detection circuit.
Described input module A, B are photoelectric coupled circuit, for receiving, isolation and amplifier STO function trigger signals.
Performing module A, B is comprising filter circuit, shaping circuit, OE diagnostic circuits, logic or circuit, the first buffering Device, the second buffer.
Filter circuit is filtered to the signal that photoelectric coupled circuit is exported, and this design can will monitor target signal filter.
Shaping circuit carries out shaping to the signal that filter circuit is exported, and the output signal of filter circuit receives OE diagnostic circuit controls System, high level is pulled into during OE is diagnosed.
Logic or circuit are carried out or computing to the output signal and power fail signal of shaping circuit.
First buffer and the second buffer series design, the part pwm signal for changing diagnosis unit transmission, are allowed to Can be used to performing module back segment power circuit use.
Signaling conversion circuit A, signaling conversion circuit B in STO diagnostic modules connect with input module A, B respectively.STO is examined Diagnosis unit in disconnected module can respectively send two-way and detect burst pulse to input module A, B by signaling conversion circuit A, B(Two Individual photoelectric coupled circuit), and the output signal of input module A, B is input into diagnosis unit.The dynamic inspection of input module is capable of achieving above Survey.
The input signal and input signal of shaping circuit A, B are input into the diagnosis unit of STO diagnostic modules, for shaping Circuit carries out dynamic diagnosis.
The output signal and logic of shaping circuit A, B or the output signal of circuit A, B are input into the diagnosis of STO diagnostic modules Unit, for carrying out dynamic diagnosis to logic or circuit.
The diagnosis unit output buffer detection signal of STO diagnostic modules to first buffer A, B sense channel, while First buffer A, B sense channel is that output signal is input into diagnosis unit.Connected at the above two and be capable of achieving to the first buffer Dynamic detection.
The detection output signal of the sense channel output signal of first buffer A, B and second buffer A, B is input into respectively To the diagnosis unit of STO diagnostic modules, for realizing the dynamic detection to the second buffer.
Diagnosis unit in STO diagnostic modules includes to the monitoring signal of performing module:The filtered electrical of first, second passage The input signal on road, the input of the shaping circuit of first, second passage, output signal, the logic or circuit of first, second passage Output signal, the sense channel output signal of the first buffer of first, second passage, the sense channel of the second buffer is defeated Go out signal.
Diagnosis unit in STO diagnostic modules includes to the output signal of performing module:First, second passage OE diagnosis electricity The detection signal on road, for the output signal of shaping circuit to be pulled into high level during OE is diagnosed;First second channel is buffered Device electric circuit inspection signal, the sense channel of output to the first buffer.
The power module has three stage power source, comprising STO functional circuits power supply and STO diagnostic module power supplys.STO functions electricity Road power supply is simultaneously that first passage and second channel are powered(Non- Redundancy Design).
The power module includes+5V1 power supplys and+5V2 power supplys.
+ 5V2 power supplys are through over-voltage over-current protection circuit, overvoltage cut-out circuit, final output STO functions in the power module Circuit power.
Undervoltage detection circuit, over-voltage detection circuit in STO diagnostic modules connect+5V2 power supplys, can be respectively by comparison principle Export under-voltage signal, over-pressed signal.
Above-mentioned under-voltage signal, over-pressed signal are input into logic NAND gate simultaneously, defeated through the output signal after NAND gate computing Enter logic sum gate A, the input of logic sum gate B into performing module, the OE letters for controlling the first buffer, the second buffer Number.
Above-mentioned under-voltage signal, over-pressed signal are input into and the monitoring of STO functional circuit power supplys are carried out to diagnosis unit simultaneously.
Above-mentioned over-pressed signal, while circuit is cut off in input to overvoltage, it is ensured that when over-pressed, cut off STO functional circuit power supplys.
Though the non-Redundancy Design of power module, its diagnosis coverage rate can reach 99%, while consider Dual Failures, for every kind of Power failure mode uses two kinds of safeguard measures, meets SIL3 requirements.
1st, overvoltage:+ 5V2 outputs connect over-voltage over-current protection circuit, such as but not limited to fuse and the combination of voltage-stabiliser tube, protect During card overvoltage, by STO functional circuits power good within the specific limits, in order to avoid burn out late-class circuit;2nd, when+5V2 reaches overvoltage When comparing threshold value, alarm and block buffer, and having served as crush-cutting deenergizing and receive over-pressed signal, STO functional circuit power supplys are blocked Output.
2nd, it is under-voltage:Module buffer OE pins are controlled by under-voltage signal, when under-voltage generation, make OE invalid, buffer envelope ripple, System enters safe operating mode;Even if the 2, under-voltage ultimately result in dead electricity, OE pin levels are made to drop in the range of significant level, it is impossible to Feng Bo, because the system is " dead electricity safety ", therefore can still enter safe operating mode.
3 excessively streams:STO functional circuits electric power loop add over-voltage over-current protection circuit, such as but not limited to fuse with it is steady The combination of pressure pipe;2nd, overcurrent protection is carried in itself for generating the chip of STO functional circuit power supplys, show as primary current excessive When, chip restarts hiccup, when accessory power supply cannot start, system dead electricity safety.
4th, overload:Similar with over current fault, simply rotection thresholds are different.Condition according to overload carries out two kinds of safeguard measures Design.
Safe torque turning off system, is made up of, the switch element safe torque breaking circuit of the present invention and switch element, For receiving the output of the second buffer, and it is converted into the torque of controlled motor rotation.
The brief course of work of safe torque breaking circuit of the present invention and system:
For first passage:STO functions trigger signal by photoelectric coupled circuit A, filter circuit A, shaping circuit A, logic sum gate A, The first buffer of final output output control A, the output of the second buffer A enable pin(OE).If STO functions trigger signal is not Triggering, then buffer OE pins enable, the buffer output part pwm signal that sends of diagnosis unit to power circuit, if now Second channel is normal, then realize that controlled motor is rotated, system worked well.If STO function trigger signals are triggered, first delays Rush that device A, the second buffer A OE pins are invalid, PWM is blocked, shut-off motor is realized, into safe operating mode.
For second channel:STO functions trigger signal by photoelectric coupled circuit B, filter circuit B, shaping circuit B, logic or Door B, the first buffer of final output output control B, the output of the second buffer B enable pin(OE).If STO functions triggering letter Number do not trigger, then buffer OE pins are enabled, the part pwm signal that buffer output diagnosis unit sends to power circuit, if Now first passage is normal, then realize that controlled motor is rotated, system worked well.If STO function trigger signals are triggered, the One buffer B, the second buffer B OE pins are invalid, and PWM is blocked, and shut-off motor are realized, into safe operating mode.
Because controlled motor produces the PWM of torque common by the output of first passage and performing module A, B of second channel Determine, as long as therefore security function signal is triggered all the way, so that it may realize STO functions.In other words, the two paths of Redundancy Design, Wherein failure does not interfere with the realization of STO functions all the way.
Advantage of the present invention is as follows:
1st, a kind of new circuit realiration STO functions are devised, realizes that binary-channel redundancy is designed, and each module(Input module, hold Row module, power module)There are the diagnostic measures of diagnosis coverage rate high, improve the security integrity levels of STO functions(Can Up to SIL3).
2nd, output channel uses two-pass design, and the dynamic detection of output module is realized under zero vector state, prevents event Barrier is accumulative, improves diagnosis coverage rate.
3rd, input channel uses two-way Redundancy Design, and the test burst pulse for having certain phase difference by sending two-way is realized defeated Enter the dynamic monitoring of module, improve diagnosis coverage rate.
Though the 4th, the non-Redundancy Design of power module, its diagnosis coverage rate can reach 99%, while consider Dual Failures, for every Plant power failure mode and use two kinds of safeguard measures, meet SIL3 requirements.
Brief description of the drawings
Fig. 1 safe torque breaking circuit schematic block diagrams of the present invention.
Fig. 2 safe torque turning off system block diagrams of the present invention.
Fig. 3 power modules and its diagnosis block diagram.
Fig. 4 input modules and its diagnosis block diagram.
Fig. 5 performing modules and its diagnosis block diagram.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described in further detail, protection scope of the present invention is not limited to Following examples.
As shown in Figure 1, 2, safe torque breaking circuit of the present invention, including power module, input module A, input module B, Performing module A, performing module B and STO diagnostic module.Wherein, input module A and performing module A is concatenated, and is constituted first and is led to Road, input module B and performing module B are concatenated, and constitute second channel(Constitute binary-channel redundancy design).
1st, power module and its diagnostic circuit
(1) power module
As shown in figure 3, power module has three stage power source, for secondary power supply, related to security function is 5V_STO power supplys, is removed Outside this, 5V_DIG power supplys are control electricity, for generating the three stage power source used for STO diagnostic modules.
(2) diagnostic circuit and measure
Due to this module not Redundancy Design, to reach diagnosis coverage rate higher, therefore two kinds are used to every kind of power failure mode Multi-form means improve diagnosis coverage rate, prevent cumulative failure.
1. overvoltage:According to system 5V_STO power supply device operating voltage ranges, overvoltage threshold, design overvoltage detection work(are set Can, when 5V_STO power supplys are more than overvoltage threshold, output overvoltage signal.To prevent overvoltage from causing dangerous failure, design measure is such as Under:1st ,+5V2 outputs connect over-voltage over-current protection circuit, the such as but not limited to combination of fuse and voltage-stabiliser tube, it is ensured that when over-pressed, By STO functional circuits power good within the specific limits, in order to avoid burning out late-class circuit;2nd, threshold value is compared when+5V2 reaches overvoltage, When alarming and block buffer, and having served as crush-cutting deenergizing and receive over-pressed signal, the power supply output of block STO functional circuits.
2. it is under-voltage:According to system 5V_STO power supply device operating voltage ranges, brownout threshold is set, design under-voltage detection work( Can, when 5V_STO power supplys are less than brownout threshold, export under-voltage signal.For prevent it is under-voltage cause dangerous failure, design measure is such as Under:1st, module buffer OE pins are controlled by under-voltage signal, when under-voltage generation, make OE invalid, and buffer envelope ripple, system enters peace Full working scope;Even if the 2, under-voltage ultimately result in dead electricity, OE pin levels are made to drop in the range of significant level, it is impossible to Feng Bo, due to The system is " dead electricity safety ", therefore can still enter safe operating mode.
3. excessively stream:To prevent excessively stream from causing dangerous failure, design measure is as follows:1st, STO functional circuits electric power loop addition The combination of over-voltage over-current protection circuit, such as but not limited to fuse and voltage-stabiliser tube;2nd, for generating STO functional circuit power supplys Chip carries overcurrent protection in itself, show as primary current it is excessive when, chip restarts hiccup, when accessory power supply cannot start, is System dead electricity safety.
4. overload:Overload fault is similar with over current fault, and simply rotection thresholds are different.Condition according to overload carries out two kinds The design of safeguard measure.
2nd, input module and its diagnostic circuit
(1) input module circuit
As shown in figure 4, input module, two-way Redundancy Design(Input module A, B).During system worked well, i.e. STO function signals It is not triggered, photoelectric coupled circuit A, photoelectric coupled circuit B are in on-state, and low level is exported respectively;When STO function signals are triggered When, photoelectric coupled circuit A, photoelectric coupled circuit B are cut off, and high level is exported respectively.
(2) input module diagnostic circuit
As shown in figure 4, signaling conversion circuit A, signaling conversion circuit B are used to change the test burst pulse that diagnosis unit sends, and The output signal of input module is input into diagnosis unit and is monitored.
Diagnostic measures are as follows:
Diagnosis unit exports two-way test burst pulse within system response time(Short of width is triggering STO functions), and two-way There are certain phase intervals in test pulse.
1. input module single channel is short-circuit, dynamic detection of opening a way:By taking input module A as an example, if being examined in certain delayed scope The monitoring signal A that disconnected unit is received is identical with test burst pulse A, then input module A is normal;If the monitoring signal A for receiving It is always high level, then input module A open faults.If the monitoring signal A for receiving is always low, input module A short circuits Failure(Short circuit herein refers to optocoupler input short or output short-circuit, and input and output intersect short circuit and will not make thrashing, therefore without inspection Survey);Input module B is similarly.
2. input module intersects short-circuit dynamic detection:Due to test burst pulse A and B do not overlap, if therefore diagnosis unit connect The monitoring signal A for receiving is identical with B, then input module A and B occurs to intersect short trouble.
3rd, performing module and its diagnostic circuit
(1) performing module
As shown in figure 5, performing module A, B(Performing module A, B is referred to as performing module with not differentiating between herein)It is input into for receiving Modules A, the signal of B outputs, determine on or off PWM outputs, so that the generation of controlled motor torque.Performing module leading portion control Circuit processed is composed in series by the first buffer and the second buffer, and upper three pipes pwm signal and lower three pipes pwm signal are controlled respectively Output.Increase switch element behind performing module and then form safe torque turning off system of the present invention.Switch element(Power electricity Road), it is controlled by the 6 road PWM that the second buffer is exported, and the conducting and shut-off of switching tube is determined, so that controlled motor is run.
By taking performing module A as an example, comprising filter circuit A, shaping circuit A, the first buffer A, the second buffer A, two strings Join the OE pins of buffer(Low level is enabled)Controlled after logic or computing by two paths of signals, determine that on or off PWM is defeated Go out, wherein, the first via is that input module A output signals are filtered, the STO function trigger signals after Shape correction(Can be diagnosed " the performing module dynamic detection signal " that unit sends is dragged down);Second tunnel is power module failure signal.Performing module B similarly, The output of its buffer enables pin and is controlled by another road STO functions trigger signal.
(2) performing module diagnostic circuit
Diagnostic measures are as follows:
1. the diagnosis of logic sum gate:Two input signals of gate(Power failure signal, after Isolation, shaping STO function trigger signals), output signal(Buffer OE signals)Unit monitoring is diagnosed, diagnosis unit is enabled in buffer Compare an input for gate and output during pin dynamic detection, gate is diagnosed according to truth table.
2. buffer enables pin(OE)The diagnosis of function:
Broken string, solder joint disengagement for being likely to occur due to OE pins etc., may cause the dangerous failure of security function, therefore do following dynamic Detection:Under zero vector state, one group of buffer that three road PWM are all with 0 is detected diagnosis unit, in system response time Interior realization is once to two groups of detections of buffer.

Claims (5)

1. a kind of safe torque breaking circuit, including power module, input module A, input module B, performing module A, execution mould Block B and STO diagnostic module;It is characterized in that:
The input module A and performing module A are concatenated, and constitute first passage, and input module B and performing module B is concatenated, and constitute the Two passages;
The power module includes STO functional circuits power supply and STO diagnostic module power supplys, and STO functional circuits power supply is simultaneously the One passage and second channel are powered;
The STO diagnostic modules are used for the dynamic detection to first passage and second channel, while for diagnosing power module.
2. a kind of safe torque breaking circuit according to claim 1, it is characterized in that:Described input module A, B are light Coupling circuit, for receiving, isolation and amplifier STO function trigger signals.
3. a kind of safe torque breaking circuit according to claim 1, it is characterized in that:Performing module A, B is included Filter circuit, shaping circuit, OE diagnostic circuits, logic or circuit, the first buffer, the second buffer;
Filter circuit is used to be filtered the signal of photoelectric coupled circuit output, will monitor target signal filter;
Shaping circuit is used to carry out shaping to the signal of filter circuit output;
Logic or circuit are used to carry out or computing the output signal and power fail signal of shaping circuit, the output of shaping circuit Signal is controlled by OE diagnostic circuits, and high level is pulled into during OE is diagnosed;
First buffer is connected with the second buffer, the pwm signal for changing diagnosis unit transmission, is allowed to for performing module Back segment power circuit.
4. a kind of safe torque breaking circuit according to claim 1, it is characterized in that:The STO diagnostic modules, including examine Disconnected unit, signaling conversion circuit A, signaling conversion circuit B, undervoltage detection circuit, over-voltage detection circuit;
The signaling conversion circuit A, signaling conversion circuit B connect with input module A, B respectively;The diagnosis unit passes through signal Change-over circuit A, B send two-way and detect burst pulse to input module A, B respectively, and input module A, B output signal be input into Diagnosis unit;
The output signal of the output signal, power fail signal and logic or circuit A, B of shaping circuit A, B is input into STO diagnosis The diagnosis unit of module, for carrying out dynamic diagnosis to logic or circuit;
The diagnosis unit output buffer detection signal of STO diagnostic modules to first buffer A, B sense channel, while first Buffer A, B sense channel is that output signal is input into diagnosis unit, realizes the dynamic detection to the first buffer;
The detection output signal of the sense channel output signal of first buffer A, B and second buffer A, B is separately input into STO The diagnosis unit of diagnostic module, for realizing the dynamic detection to the second buffer;
STO functional circuits power input is to undervoltage detection circuit, over-voltage detection circuit, undervoltage detection circuit, over-voltage detection circuit Output signal be input into diagnosis unit, realize over-pressed, the under-voltage detection to STO functional circuit power supplys.
5. a kind of safe torque turning off system, by one of claim 1-4 described safe torque breaking circuit and switch element Constitute, the switch element, for receiving the output of the second buffer, and be converted into the torque of controlled motor rotation.
CN201710264681.6A 2017-04-21 2017-04-21 A kind of safe torque breaking circuit and system Active CN106877291B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710264681.6A CN106877291B (en) 2017-04-21 2017-04-21 A kind of safe torque breaking circuit and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710264681.6A CN106877291B (en) 2017-04-21 2017-04-21 A kind of safe torque breaking circuit and system

Publications (2)

Publication Number Publication Date
CN106877291A true CN106877291A (en) 2017-06-20
CN106877291B CN106877291B (en) 2019-06-28

Family

ID=59162974

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710264681.6A Active CN106877291B (en) 2017-04-21 2017-04-21 A kind of safe torque breaking circuit and system

Country Status (1)

Country Link
CN (1) CN106877291B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108233685A (en) * 2018-03-07 2018-06-29 深圳市禾望电气股份有限公司 A kind of safe torque switches off control circuit and transmission system
CN109428585A (en) * 2017-08-31 2019-03-05 浙江海利普电子科技有限公司 Control circuit and its method based on optocoupler
CN111220841A (en) * 2018-11-26 2020-06-02 皮尔茨公司 Safe voltage monitoring
CN111355428A (en) * 2018-12-21 2020-06-30 上海辰竹仪表有限公司 Safe torque turn-off circuit and motor control system applying same
CN111404423A (en) * 2020-03-27 2020-07-10 苏州汇川技术有限公司 Safe torque turn-off control method and circuit and motor controller
CN112117952A (en) * 2019-06-20 2020-12-22 台达电子工业股份有限公司 Motor driving system and control method
CN112947387A (en) * 2021-03-29 2021-06-11 苏州伟创电气科技股份有限公司 Diagnostic device and safe torque shutoff system
US11133770B2 (en) 2019-06-20 2021-09-28 Delta Electronics, Inc. Motor drive system and control method therefor
CN113692702A (en) * 2018-11-30 2021-11-23 伦茨欧洲股份公司 Method for monitoring the operation of a frequency converter and frequency converter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203827308U (en) * 2013-03-08 2014-09-10 控制技术有限公司 Device for preventing output of input signal, device for providing output voltage for driving motor, and motor driving system
JP2016052146A (en) * 2014-08-28 2016-04-11 ローム株式会社 Protection circuit, control circuit for switching power source employing the same, power supply circuit, electronic apparatus and base station
CN105576952A (en) * 2015-12-30 2016-05-11 深圳市英威腾电气股份有限公司 Safe torque off (STO) control circuit and system
CN205319683U (en) * 2015-12-14 2016-06-15 宁波安信数控技术有限公司 Safe torque shutoff functional circuit
CN206685883U (en) * 2017-04-21 2017-11-28 南京埃斯顿自动控制技术有限公司 A kind of safe torque breaking circuit and system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203827308U (en) * 2013-03-08 2014-09-10 控制技术有限公司 Device for preventing output of input signal, device for providing output voltage for driving motor, and motor driving system
JP2016052146A (en) * 2014-08-28 2016-04-11 ローム株式会社 Protection circuit, control circuit for switching power source employing the same, power supply circuit, electronic apparatus and base station
CN205319683U (en) * 2015-12-14 2016-06-15 宁波安信数控技术有限公司 Safe torque shutoff functional circuit
CN105576952A (en) * 2015-12-30 2016-05-11 深圳市英威腾电气股份有限公司 Safe torque off (STO) control circuit and system
CN206685883U (en) * 2017-04-21 2017-11-28 南京埃斯顿自动控制技术有限公司 A kind of safe torque breaking circuit and system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109428585A (en) * 2017-08-31 2019-03-05 浙江海利普电子科技有限公司 Control circuit and its method based on optocoupler
CN109428585B (en) * 2017-08-31 2022-09-06 浙江海利普电子科技有限公司 Control circuit based on optical coupler and method thereof
CN108233685B (en) * 2018-03-07 2023-09-29 深圳市禾望电气股份有限公司 Safe torque turn-off control circuit and transmission system
CN108233685A (en) * 2018-03-07 2018-06-29 深圳市禾望电气股份有限公司 A kind of safe torque switches off control circuit and transmission system
CN111220841A (en) * 2018-11-26 2020-06-02 皮尔茨公司 Safe voltage monitoring
CN113692702A (en) * 2018-11-30 2021-11-23 伦茨欧洲股份公司 Method for monitoring the operation of a frequency converter and frequency converter
CN111355428A (en) * 2018-12-21 2020-06-30 上海辰竹仪表有限公司 Safe torque turn-off circuit and motor control system applying same
CN111355428B (en) * 2018-12-21 2024-05-14 上海辰竹仪表有限公司 Safety torque turn-off circuit and motor control system using same
CN112117952B (en) * 2019-06-20 2022-04-19 台达电子工业股份有限公司 Motor driving system and control method
US11133770B2 (en) 2019-06-20 2021-09-28 Delta Electronics, Inc. Motor drive system and control method therefor
CN112117952A (en) * 2019-06-20 2020-12-22 台达电子工业股份有限公司 Motor driving system and control method
CN111404423A (en) * 2020-03-27 2020-07-10 苏州汇川技术有限公司 Safe torque turn-off control method and circuit and motor controller
CN112947387A (en) * 2021-03-29 2021-06-11 苏州伟创电气科技股份有限公司 Diagnostic device and safe torque shutoff system

Also Published As

Publication number Publication date
CN106877291B (en) 2019-06-28

Similar Documents

Publication Publication Date Title
CN106877291A (en) A kind of safe torque breaking circuit and system
CN102118018B (en) Protection circuit with functions of upper limit and lower limit
CN104133131B (en) A kind of IGBT driving malfunctions detection and diagnostic method
CN102497002B (en) Fully-duplicated protective redundancy system for direct-current transmission project
KR100807342B1 (en) Multi-protection system using operation signals of protection components in separate relays
CN110794805B (en) Robot safety circuit and control method thereof
CN108493904A (en) IGBT Safety Shutdown Systems and method for automobile motor shutdown
CN106253651A (en) A kind of numerically controlled modularized microcomputer source over under-voltage protection circuit
CN106864270A (en) Relay control system with fault diagnosis functions
CN107069668A (en) A kind of frequency converter failure protection device and frequency converter
CN206685883U (en) A kind of safe torque breaking circuit and system
CN109733374A (en) Controller power supply system
CN102080627A (en) Safety chain unit for double-fed wind generating set
CN105931679B (en) Reactor protection system two takes one to meet maintenance bypass device
CN205509845U (en) Quick isolating device of MMC direct current trouble
TWI740940B (en) Fault current limiter and method thereof
CN106647351A (en) Redundancy switching circuit
CN203071901U (en) Three-phase solid-state relay
CN206133294U (en) Controller fault protection system
CN105788687B (en) Reactor protection system two from three meets maintenance bypass system
CN105067927A (en) Servo driver brake resistor loop detection method
CN108429537A (en) A kind of photovoltaic DC-to-AC converter fault logic circuits and electronic equipment
CN205160031U (en) Device for detecting disconnection
CN104794844A (en) Converter station valve hall fire signal extension device
CN206834729U (en) A kind of frequency converter failure protection device and frequency converter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20190409

Address after: 211100 No. 155 General South Road, Jiangning Economic and Technological Development Zone, Nanjing City, Jiangsu Province

Applicant after: Nanjing Estun Automation Co., Ltd.

Address before: 211100 No. 155 General Avenue, Jiangning Economic Development Zone, Nanjing City, Jiangsu Province

Applicant before: Nanjing Estun Automatic Control Technology Co., Ltd.

GR01 Patent grant
GR01 Patent grant