CN102939717A - Device for electric circuit monitoring - Google Patents
Device for electric circuit monitoring Download PDFInfo
- Publication number
- CN102939717A CN102939717A CN2011800141061A CN201180014106A CN102939717A CN 102939717 A CN102939717 A CN 102939717A CN 2011800141061 A CN2011800141061 A CN 2011800141061A CN 201180014106 A CN201180014106 A CN 201180014106A CN 102939717 A CN102939717 A CN 102939717A
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- China
- Prior art keywords
- current
- electric
- control
- control appliance
- splitter
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- 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
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/18—Modifications for indicating state of switch
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch
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- Electronic Switches (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a device for electric circuit monitoring an electrical load circuit comprising at least one electrical load (19), wherein two supply voltage connections (15, 16) are connected to the two load connections (17, 18) by means of current paths (11, 12) each comprising one first semiconductor switch (13, 14). The current detecting means (26, 27) serve to detect the current in each of the two current paths (11, 12). The series connection of a further second semiconductor switch (22, 23) and a low-current shunt (24, 25) is connected in parallel with each high-current shunt in each of the two current paths (11, 12), wherein the two connections of the low-current shunt (24, 25) are each connected to the current detecting means (26, 27).
Description
Technical field
The present invention relates to a kind of device for the customer loop that comprises at least one electric consumption device being carried out electric monitor loop, wherein two supply voltage terminals are connected with two customer terminals via the current path with first semiconductor switch respectively.
Background technology
For example as the safety trip system, when recognizing failure situations or misoperation with box lunch, especially deexcitation is rich in the device assembly of energy to this device.Under these circumstances, especially cut-off current or supply voltage and/or generation failure message and/or fault show.Can the genuine or two passage ground separation consumes devices of single-pass.This safety trip system is for example known by WO 02/095282 A1.In order to guarantee that thyristor in fact also can disconnect safety return circuit under dangerous situation, described thyristor repeatedly disconnected in known manner in short time and monitoring to the effect of detection circuit.This is realized by the voltage at switch-side place by observing.After detecting clearly the shutoff pulse, again connect adaptively customer.But this brings following shortcoming: this shutoff pulse may become so long, thereby so that the reaction of turn-offing may be important for load and in case of necessity also may be harmful to function.The switch path of therefore realizing in known manner the second parallel connection, interrupted supply to load is born in the time of check pulse in the switch path of described the second parallel connection.But this means the raising that expends.
Summary of the invention
Task of the present invention is, realize a kind of device for electric monitor loop, not only can monitor for the switching capability that the electric consumption device is carried out the semiconductor switch of switch by described device, very short hold off interval or current interruptions is possible wherein, and can not affect the operation of customer with perceiveing, measure to be used for identifying unallowed transverse current but also can additionally implement transverse current.
The device of this task feature by having claim 1 according to the present invention solves.
Device according to the present invention especially has the following advantages: except checking or monitoring the transistorized switching capability, can also carry out transverse current and measure, in order to identify and detect horizontal short circuit.Can realize transistorized very short switching time or break time being used for measurement at this by current measurement, and not affect the operation of one or more electric consumption devices.
By mentioned in the dependent claims measure, the favourable improvement of illustrated device and improvement are possible in claim 1.
Advantageously, two the first semiconductor switchs in two current paths can consist of high current splitter simultaneously, so that can abandon independent high current splitter.
Advantageously, described device is constructed to be connected on the electric equipment between supply voltage and at least one the outside electric consumption device, comprises the internal consumption device in parallel with at least one outside customer in described electric equipment.The check of transistorized switching capability is possible with the transverse current measurement at the outside customer place not connection or that turn-off individually that is connected thus.
In order to control two the first semiconductor switchs in two current paths and two the second semiconductor switchs in the parallel branch, be advantageously provided the control electronics that is connected with current sensing means, described control electronics preferably is constructed to microcontroller or comprises at least one such microcontroller.
In order in the situation of low and high fault current, to carry out measurement, control appliance eligibly has control device, described control device is used for coming the converted measurement scope by disconnecting the first semiconductor switch when the electric current that detects by high current splitter, and described electric current is positioned at below the value given in advance or can be given in advance.
In order to monitor especially simply transverse current and the horizontal short circuit of identification, control appliance has comparison means and the report that can activate and/or the display unit that compares for the current measurement value to two current paths and/or parallel branch in addition when recognizing deviation.
Realize in the following manner in the particularly advantageous mode of the horizontal short circuit of high ohm at high ohm load place for the turn-off capacity of testing circularly all crystals pipe and detection, be that control appliance has control device, described control device be used for short time repeatedly side by side turn-off two the first semiconductor switchs and two the second semiconductor switchs one of respectively and measure electric current in the parallel branch that is not turned off respectively.Can be respectively alternately and carry out circularly the shutoff of the second semiconductor switch.At this, the time that does not affect the operation of a described electric consumption device or a plurality of electric consumption devices is set to the short turn-off time.
Control appliance is also eligibly via bus system or wirelessly be connected with control appliance with outer monitoring, so that message transfer or carry out parametrization.
Control appliance also eligibly has for the cutoff device that turn-offs all semiconductor switchs when recognizing fault or the value of overstepping the extreme limit.
Description of drawings
Embodiments of the invention are shown in the drawings and set forth in more detail in the following description.The circuit that unique embodiment illustrates for the device of electric monitor loop consists of.
Embodiment
In the embodiment shown in unique figure, the electric equipment 10 that is used for monitor loop comprises two current paths 11,12, respectively access transistor 13,14 switch highway section in described current path 11,12.Two current paths 11,12 are connected on the one hand on two supply voltage terminals 15,16 of in addition unshowned supply-voltage source and are connected on the outside customer 19 via two customer terminals 17,18 on the other hand, wherein also can be a plurality of customers in principle, described a plurality of customers also can be non-ohm customer (for example capacitive character and/or inductive and/or ohm customers).
The first transistor 13,14 and transistor seconds 22,23 be shown as in the figure power MOSFET.But also can use in principle other transistors or other switch elements.In addition, two the first transistors 13,14 internal resistance also side by side are used as high current splitter.To this alternately, independent high current splitter also can be connected with transistor 13,14, so wherein parallel branch 20,21 must be in parallel with this high current splitter.
Shown and described circuit or corresponding equipment 10 are used for utilizing electric current that the scope conversion in the load branch in switch stage makes up and transverse current to measure and are used for check transistor 13,14 or 22,23 turn-off capacity.By turn-offing in short time one or more in the described transistor in the mode of suitable combination and measuring simultaneously the check that electric current carries out transistorized turn-off capacity.If no current flows under off state, the corresponding transistor that then turn-offs successfully or turn-offed is correctly worked.This measurement also must be worked in the situation without the outside customer 19 that connects, and connects the basic load of internal load or the 34 conduct definition of internal consumption device at the output of equipment 10, so wherein the current flowing of definition is evaluated for this reason.
Normally in service, two passages, also namely two current paths 11,12 are connected into symmetrically, and wherein in order to connect load, all crystals pipe 13,14,22,23 is switched on.Load current is directly transistor 13,14 extract as internal resistance place of high current splitter, and via low current splitter 24,25 and circuit shunt transducer 26,27 measured in combination.
If identify according to circuit shunt transducer 26,27 output signal now, load current is too low for high current measuring range, then two the first transistors 13,14 are turned off or end, the transistor seconds 22,23 and low current splitter 24,25 and correspondingly be extracted at these low current splitter places so that load current is only also flowed through.For two measurements effectively: if shunt current transducer 26, two current measurement values of 27 differ from one another, especially significantly differ from one another, the electric current that then flows to load is not equal to the electric current that flows back to, thereby must have the horizontal short circuit that causes fault current.
All crystals pipe 13,14,22,23 turn-off capacity are tested with being recycled.For this reason transistor 13,14,22 or transistor 13,14,23 be turned off in short time in the modes that repeat.If switch is worked orderlyly, then this causes respectively that measured current flowing interrupts in the low current branch of another passage respectively or parallel branch 20 or 21.Turn-off so in short time respectively transistor, so that the operation of outside customer 19 is unaffected.
In the low ohmic resistance situation high ohm laterally the detection of short circuit can dynamically identify by turn-offing in short time a passage equally according to the present invention, also namely by turn-offing transistor 13,14,22 or transistor 13,14,23.Load therefore alternately in short time positive side or minus side be turned off and the parallel branch 20 to 21 there in the passage that is not turned off in electric current measured.If this current flowing is not to be zero, then there is out of order horizontal short circuit in all switch combinations.
Control program that be used for to measure circulation is included in control appliance 28 or is included in the microcontroller 33.If identify transistor 13,14,22, one of 23 out of order shutoff or horizontal short circuit, then produce fault-signal or report signal, it is for example to external control or watch-dog report.So there or at electric equipment 10 places, produce warning message acoustics and/or optics or demonstration, wherein also can realize failed storage.Simultaneously turn-off all crystals pipe 13,14,22,23 according to the seriousness of failure condition.
The internal resistance of using in the first transistor 13, the high current splitter of 14 conduct is several milliohms, and be used for low current splitter 24,25 resistance value be selected as from several ohms to kilohm.The transistorized very short turn-off time that for example is used for the measurement turn-off capacity for example is 3 μ s, wherein just can successfully carry out measurement when the short like this time, and the function of outside customer 19 is also unaffected.
Claims (11)
1. device that is used for the customer loop that comprises at least one electric consumption device (19) is carried out electric monitor loop, wherein supply voltage terminals (15 for two, 16) respectively via having the first semiconductor switch (13,14) current path (11,12) with two customer terminals (17,18) connect, has current sensing means (26,27), for detection of at two current paths (11,12) electric current in each, and have each a high current splitter, wherein another second semiconductor switch (22 in each of two current paths (11,12), 23) with low current splitter (24,25) series circuit and described high circuit shunt device consist of parallel branch (20,21), and wherein the low current splitter (24,25) two terminals connect with current sensing means (26,27) respectively.
2. device according to claim 1 is characterized in that, two the first semiconductor switchs (13,14) in two current paths (11,12) consist of high current splitter.
3. device according to claim 1 and 2, it is characterized in that, described device is constructed to be connected on the electric equipment (10) between supply voltage and at least one the outside electric consumption device (19), comprises the internal consumption device (34) in parallel with outside customer (19) in described electric equipment.
4. according to the described device of one of aforementioned claim, it is characterized in that, arrange and current sensing means (26,27) control electronics (28) that connects, be used for two the first semiconductor switchs (13,14) and parallel branch (20 in two current paths of control (11,12), 21) two the second semiconductor switchs (22,23) in.
5. device according to claim 4, it is characterized in that, control appliance (28) has control device, described control device is used for by disconnecting the first semiconductor switch (13 when the electric current that detects by high current splitter, 14) come the converted measurement scope, described electric current is positioned at below the value given in advance or can be given in advance.
6. according to claim 4 or 5 described devices, it is characterized in that, control appliance (28) has for to two current paths (11,12) and/or the current measurement value in the parallel branch (20,21) comparison means and the report that when recognizing deviation, can activate and/or the display unit that compare.
7. according to claim 4 to one of 6 described devices, it is characterized in that, control appliance (28) has control device, described control device is used for short time repeatedly and side by side turn-offs one of difference in two the first semiconductor switchs (13,14) and two the second semiconductor switchs (22 or 23) and the electric current of measurement in the parallel branch that is not turned off respectively (21 or 20).
8. device according to claim 7 is characterized in that, the time that does not affect the operation of electric consumption device (19) is set to the short turn-off time.
9. according to claim 4 to one of 8 described devices, it is characterized in that control appliance (28) comprises at least one microcontroller (33) or is constructed to microcontroller.
10. according to claim 4 to one of 9 described devices, it is characterized in that control appliance (28) is via bus system (35) or wirelessly be connected with outer monitoring or control appliance.
11. to one of 10 described devices, it is characterized in that control appliance (28) has for the cutoff device that turn-offs all semiconductor switchs (13,14,22,23) when recognizing fault or the value of overstepping the extreme limit according to claim 4.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010004524.1 | 2010-01-14 | ||
| DE102010004524.1A DE102010004524B4 (en) | 2010-01-14 | 2010-01-14 | Device for electrical circuit monitoring |
| PCT/EP2011/000070 WO2011085958A1 (en) | 2010-01-14 | 2011-01-11 | Device for electric circuit monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102939717A true CN102939717A (en) | 2013-02-20 |
Family
ID=43858076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800141061A Pending CN102939717A (en) | 2010-01-14 | 2011-01-11 | Device for electric circuit monitoring |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2524432A1 (en) |
| CN (1) | CN102939717A (en) |
| DE (1) | DE102010004524B4 (en) |
| WO (1) | WO2011085958A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013000846A1 (en) * | 2013-01-21 | 2014-08-14 | Phoenix Contact Gmbh & Co. Kg | I / O device with a current flow monitoring unit and use of such |
| DE102015003925A1 (en) * | 2015-03-25 | 2016-09-29 | Festo Ag & Co. Kg | Safety-related load switching device and method for operating a safety-related load switching device |
| DE102015213156A1 (en) | 2015-07-14 | 2017-02-02 | Festo Ag & Co. Kg | Safety-related load switching device and method for operating a safety-related load switching device |
| DE102020113822A1 (en) | 2019-06-13 | 2020-12-17 | Turck Holding Gmbh | Device and method for electrical circuit monitoring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5539602A (en) * | 1994-10-19 | 1996-07-23 | Gte Airfone Incorporated | Ground fault interrupter |
| US20040160131A1 (en) * | 2001-05-22 | 2004-08-19 | Richard Veil | Safety switching module and method for testing the switching-off ability of a switching element in a safety switching module |
| US20040184208A1 (en) * | 2003-03-19 | 2004-09-23 | Daniel Liu | Power protecting device for electrical power source and load |
| US7411317B2 (en) * | 2005-09-28 | 2008-08-12 | Prodigit Electronics Co., Ltd. | Electrical load status detection and control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10154158A1 (en) * | 2001-11-03 | 2003-05-22 | Bosch Gmbh Robert | Device for controlling an electrical load and control device |
| DE102006040737A1 (en) * | 2006-08-31 | 2008-03-06 | Robert Bosch Gmbh | Electromagnetic valve output stage shunt recognizing device for motor vehicle`s brake circuit, has test pad arranged parallel to output stage-transitor to adjust current flow via coil, and comprising voltage comparator to measure variables |
-
2010
- 2010-01-14 DE DE102010004524.1A patent/DE102010004524B4/en not_active Expired - Fee Related
-
2011
- 2011-01-11 CN CN2011800141061A patent/CN102939717A/en active Pending
- 2011-01-11 EP EP11702919A patent/EP2524432A1/en not_active Withdrawn
- 2011-01-11 WO PCT/EP2011/000070 patent/WO2011085958A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5539602A (en) * | 1994-10-19 | 1996-07-23 | Gte Airfone Incorporated | Ground fault interrupter |
| US20040160131A1 (en) * | 2001-05-22 | 2004-08-19 | Richard Veil | Safety switching module and method for testing the switching-off ability of a switching element in a safety switching module |
| US20040184208A1 (en) * | 2003-03-19 | 2004-09-23 | Daniel Liu | Power protecting device for electrical power source and load |
| US7411317B2 (en) * | 2005-09-28 | 2008-08-12 | Prodigit Electronics Co., Ltd. | Electrical load status detection and control device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011085958A1 (en) | 2011-07-21 |
| DE102010004524A1 (en) | 2011-07-21 |
| EP2524432A1 (en) | 2012-11-21 |
| DE102010004524B4 (en) | 2017-01-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130220 |