WO2009062536A1 - Dispositif de commutation et procédé de contrôle d'un relais électromagnétique - Google Patents

Dispositif de commutation et procédé de contrôle d'un relais électromagnétique Download PDF

Info

Publication number
WO2009062536A1
WO2009062536A1 PCT/EP2007/009999 EP2007009999W WO2009062536A1 WO 2009062536 A1 WO2009062536 A1 WO 2009062536A1 EP 2007009999 W EP2007009999 W EP 2007009999W WO 2009062536 A1 WO2009062536 A1 WO 2009062536A1
Authority
WO
WIPO (PCT)
Prior art keywords
relay coil
switching
relay
switching device
switching devices
Prior art date
Application number
PCT/EP2007/009999
Other languages
German (de)
English (en)
Inventor
Harald Kapp
Harald Strohmaier
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CN200780101582.0A priority Critical patent/CN101889323B/zh
Priority to EP07846672.9A priority patent/EP2208215B1/fr
Priority to PCT/EP2007/009999 priority patent/WO2009062536A1/fr
Publication of WO2009062536A1 publication Critical patent/WO2009062536A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits

Definitions

  • the invention relates to a switching arrangement for driving a relay coil having a relay relay and having electromagnetic relay in which in a current path with the relay coil two switching devices are arranged such that a first switching device with a first connection of the relay coil and a second switching device with a second connection the relay coil is in communication; a drive device is provided which is set up to close both switching devices in order to produce a current flow through the relay coil and to open both switching devices in order to interrupt a current flow through the relay coil.
  • the invention also relates to a corresponding method for driving an electromagnetic relay.
  • Electromagnetic relays In electrical devices, electromagnetic relays are often used to perform controlled switching operations. Electromagnetic relays usually consist of a relay coil and at least one pair of electrical relay contacts. If an electric current is applied to the relay coil, a magnetic field is generated around the relay coil, whereby - in the case of self-releasing relays - a closing of the relay contacts is effected so that a current flow via the relay contacts is possible. If the current flowing through the relay coil interrupted again, the movable part of the relay contacts is moved back, for example by means of a spring means in its initial position, causing an opening of the relay contacts and interrupts the flow of current through them. For self-closing relays are the contacts closed in the de-energized state of the relay coil and open in the current-carrying state.
  • Electromagnetic relays are usually used where, by means of a comparatively low current from a drive circuit, a comparatively larger current in a switching circuit is to be switched on or off.
  • the electromagnetic relay forms in this case a galvanic decoupling of the drive circuit and the switching circuit.
  • Electromagnetic relays are used for example in electrical protection devices for monitoring electrical energy supply networks to cause in the case of a fault (eg a short circuit) in the electrical energy supply network by closing the relay contacts of a so-called "command relay" a draw of an electrical circuit breaker and so interrupt the fault current.
  • a fault eg a short circuit
  • command relay a draw of an electrical circuit breaker
  • the relay coil is not only driven by a possibly fault-prone single switching device, but instead via two switching devices located in the current path of the relay coil.
  • the relay coil is only activated when both switching devices are closed at the same time.
  • a switching device is opened, the current flow through the relay coil is interrupted.
  • Such a switching arrangement is known for example from German Patent DE 44 09 287 Cl, from which a relay coil emerges, which lies with two switching devices in the form of transistors in a current path.
  • the invention has for its object to provide a circuit arrangement and a method of the type mentioned above, which allow a predictive review of the relay coil and the two switching devices to possibly occurred errors.
  • a switching arrangement of the type mentioned above in which the drive means for emitting test signals to the first and the second switching means is arranged, wherein the test signals are such that they do not the current state of the relay contacts influence; an input of a conversion device is acted upon by a measuring voltage which is tapped between a connection of the relay coil and one of the switching devices, wherein the conversion device is set up to convert the measurement voltage into a binary response signal; and with an output of the conversion device, a monitoring device is connected, which evaluates the course of the binary response signal during the transmission of the Prufsignale by the drive means and an error in the relay coil or one of
  • the particular advantage of the inventive switching arrangement is that a comparatively inexpensive examination of the correct function of the relay coil and the two switching devices is already possible if no faulty switching operation of the relay has yet been carried out. In this way, as it were, a forward check of the relay coil and the two switching devices can be performed for possible errors.
  • the two switching devices are semiconductor switches, in particular transistors. Such semiconductor switches can be switched on and off particularly quickly and with low switching powers.
  • a further advantageous embodiment of the inventive switching arrangement further provides that in the current path of the relay coil in each case between a terminal of the relay coil and a switching device, a terminal of a Dampfungskondensators is arranged. Due to the steaming effect of the capacitors, the course of the measuring voltage and thus the course of the binary response signal can be extended in time such that a particularly simple evaluation is possible.
  • a further advantageous embodiment of the switch arrangement according to the invention further provides that the conversion device has a voltage divider arranged parallel to the current path of the relay coil, whose voltage divider tap on the one hand is acted upon by the measuring voltage and on the other hand fed to a control input of a further switching device for obtaining the binary response signal becomes. In this way, a binary response signal from the measurement voltage can be generated without much circuit complexity.
  • the further switching device may be, for example, a semiconductor switch, in particular a MOSFET (Metal Oxide Semiconductor Field Effect Transistor). Field-effect transistors are driven by voltages and are therefore particularly suitable in the present case for the conversion of the measured voltage into a binary response signal.
  • MOSFET Metal Oxide Semiconductor Field Effect Transistor
  • the above-mentioned object is achieved by a method for driving an electromagnetic relay having a relay coil and relay contacts, wherein both switching devices are closed to produce a current flow through the relay coil and to interrupt a current flow through the relay coil both switching devices are opened, wherein the switching devices are arranged in a current path with the relay coil such that the first switching device is connected to a first terminal of the relay coil and the second switching device with a second terminal of the relay coil in connection, wherein in the inventive method Control device emits test signals to the two switching devices that do not affect the current state of the relay contacts; between a terminal of the relay coil and one of the switching devices, a measuring voltage is tapped; the measuring voltage is converted into a binary response signal; and an error in the relay coil or one of the two switching devices is displayed if the course of the binary response signal deviates from an expected course.
  • a check of the drive circuit of the electromagnetic relay can advantageously take place in a forward-looking manner.
  • time-delayed Pruf- signals are delivered to the two switching devices, which are shorter than a response time of the relay.
  • the time is regarded as the response time of the relay, which requires a magnetic field generated by the relay coil to react with sudden change in a voltage applied to the relay coil with a change in the switching state of the relay contacts.
  • the relay coil If, for example, the relay coil is switched off in the case of a completely constructed magnetic field, the magnetic field does not build up until a certain time delay has elapsed. Only when the magnetic field strength is no longer sufficient to hold the relay contacts in their previous position, the state of the relay contacts changes. If you switch back on the timely Relay coil, so the magnetic field builds up again and the relay contacts remain in their state without change.
  • a magnetic field of the relay coil in a sudden application of a voltage to the - previously de-energized - relay coil requires a certain amount of time until its magnetic field strength is sufficient to control the relay contacts. If the current flow is interrupted in good time, the state of the relay contacts does not change.
  • test signals must therefore be so short in terms of their duration that no change in the state of the relay contacts occurs due to the inertia of the magnetic field of the relay coil to be built up or reduced.
  • a check of the two switching devices and the relay coil for possible errors can be carried out with the method according to the invention both in the de-energized and in the current-carrying state of the relay coil.
  • a check in the de-energized state of the relay coil and the tap of the measuring voltage between the second terminal of the relay coil and the second switching device for example, be performed by the Pruf signals are issued in the following sequence:
  • a Prufsignal is delivered to the first switching device.
  • a check can be carried out according to an advantageous development in that the first switching device is permanently driven, while the second switching device is controlled via a pulsed test signal.
  • the time profile of the binary response signal can be compared, for example, continuously with the expected course.
  • a particularly advantageous embodiment of the inventive method provides that to determine whether an error in the relay coil or one of the switching devices is present, the binary response signal is compared to at least two characteristic times with the expected course, wherein between the characteristic times at least a change has occurred with respect to the state of at least one check signal.
  • the computing power required for the comparison of the monitoring device is kept relatively low, since the course of the binary response signal and the expected course in the simplest case only at two particularly characteristic times must be compared and thus a continuous comparison is not necessary.
  • the method according to the invention should be repeated at regular intervals.
  • test signals are emitted by the control device depending on the state of the relay contacts.
  • FIG. 1 shows a schematic block diagram of a general embodiment of a switching arrangement for actuating an electromagnetic relay
  • FIG. 2 shows a circuit diagram of a possible embodiment of a switching arrangement for actuating an electromagnetic relay
  • FIG. 3 shows a plurality of diagrams for explaining exemplary test signals and the measurement voltages and binary response signals produced thereby during a check in the currentless state of the relay coil
  • FIG. 4 shows a method flow diagram for explaining an exemplary embodiment of a check in the de-energized state of the relay coil
  • FIG. 5 shows a test signal sequence for monitoring in the current-carrying state of the relay coil
  • FIG. 6 shows a plurality of diagrams for explaining exemplary test signals and the resulting test signals
  • FIG. 7 shows a method flowchart for explaining an exemplary embodiment of a check in the current-carrying state of the relay coil.
  • FIG. 1 shows a schematic block diagram of an exemplary embodiment of a switching arrangement for actuating an electromagnetic relay.
  • a control circuit of the electromagnetic relay comprises in a current path 10 a series connection of a relay coil 11 with a first switching device 12a and a second switching device 12b, wherein the switching devices 12a and 12b are symbolized in Figure 1 only by way of example by mechanical switching devices.
  • the switching devices 12a and 12b may be formed by mechanical switches or semiconductor switches, such as transistors.
  • the high voltage level V + may be at 10 V while the low voltage level V- is at 0 V.
  • the first switching device 12a is connected to a first terminal IIa the relay coil 11 on the side of the high voltage level V + in conjunction, while the second switching means 12b on the side of the low voltage level V- with a second terminal IIb of the relay coil 11 is in communication.
  • the first and second switching devices 12a and 12b are connected to their drive inputs with a drive device 13 in connection. Via the drive device 13, the switching devices 12a and 12b can be switched on or off.
  • the drive device 13 is set up to supply test signals to the drive input of the first and the second switching devices 12a and 12b, as will be explained in more detail later.
  • a measuring voltage U mess is tapped off via a branch 14 and fed to a converting device 15.
  • the conversion device 15 is adapted to the measurement voltage U mess in a binary
  • Reply signal BS implement and deliver this at its output.
  • the binary response signal BS is fed to a monitoring device 16, which can exchange information with the control device 13.
  • the monitoring device 16 can either - as shown in FIG. 1 - form an independent unit or-in deviation from the representation in FIG. 1-can be integrated into the control device 13.
  • Both the driver 13 and the monitor 16 may include a microprocessor or other logic device (e.g., an ASIC) that controls their operation.
  • the measuring voltage ⁇ / me can also be arranged at the connection between the first switching device 12a and the first connection of the relay coil 11.
  • the sequence of the test signals described below for monitoring the current path 10 is in such a case correspondingly reversed to the two Distribute switching devices 12a and 12b, the error trap described below are also adapted accordingly.
  • a tapping of the measuring voltage U me "according to FIG. 1, that is to say between the second switching device 12b and the second connection of the relay coil 11, should be assumed.
  • a switching arrangement for driving an electromagnetic relay can be constructed, for example, as shown in FIG.
  • FIG. 1 For components corresponding to FIG. 1, the same reference numerals are used in FIG.
  • FIG. 2 shows a relay coil 11 which is connected on the high voltage level V + side to a first switching device 12a with its first connection IIa, while the second connection IIb of the relay coil 11 is on the low voltage V- side with a second switching device 12b communicates.
  • the switching devices 12a and 12b are shown in FIG. 2 as semiconductor switches in the form of transistors.
  • the core piece of the conversion device 15 forms a voltage divider 22, which for example consists of two ohmic resistors 22a and 22b. Between the two ohmic resistors 22a and 22b is apalssmaschinerabgriff 23, on the one hand with the branch 14 for the measuring voltage and on the other hand is in communication with a control input of a further switching device 24.
  • Another ohmic resistor 26 is used to adjust the voltage level of the binary response signal BS.
  • a terminal of a first Dampfungskondensators 27a is connected, which lies with its other terminal at the low voltage level V-. Accordingly, at the connection between the second switching device 12b and the second terminal IIb of the relay coil 11 is connected to its one terminal, a second Dampfungskondensator 27b, whose second terminal is also at the low voltage level V-.
  • the control device 13 initially serves to establish a current flow through the relay coil 1 or to interrupt it by simultaneously opening or closing the switching devices 12a and 12b.
  • a current flow through the relay coil 11 is produced, whereby a developed corresponding magnetic field in the relay coil 11 and from a certain magnetic field strength, causing a change in the state of the (not shown) relay contacts of the electromagnetic relay.
  • the control device 13 opens the two switching devices 12a and 12b, so that the magnetic field generated by the relay coil 11 degrades again. If the field strength generated by the magnetic field is no longer sufficient to hold the relay contacts in their position, they go over to their normal position, for example due to the action of a spring force.
  • the proper control of the relay coil 11 and thus of the arranged on the relay contacts switching circuit can no longer be guaranteed.
  • the electromagnetic relay is a command relay for driving an electric circuit breaker
  • such a malfunction can cause, for example, an unwanted tripping of the circuit breaker or a deliberate triggering of the circuit breaker can be prevented. Therefore, a check of the existing of the two switching devices 12a and 12b and the relay coil current path 10 takes place.
  • test signals P_A, P_B are output by the control device 13 to the switching devices 12a and 12b, which result in a change in the voltage level at the branch 14.
  • the voltage applied to this branch 14 measuring voltage U meiS is fed to the converting device 15, where it is in a binary Response signal BS is implemented.
  • the course of the binary response signal BS is compared by the monitoring device 16 with an expected course, and an error in the current path 10 is detected if the expected course and the actual course of the binary response signal BS differ from each other.
  • the monitoring device 16 is able to use the control device 13 to provide information, for example about the beginning of sending the check signals P__A, P_B to the two switching devices 12a and 12b to be informed.
  • a corresponding error message can be issued that informs an operator of a device in which the electromagnetic relay is installed, about the error.
  • the operator of the corresponding device can then replace the corresponding faulty module, even before it can lead to an actual malfunction of the electromagnetic relay.
  • a check of the current path 10 for possible errors can be carried out both in the currentless and in the current-carrying state of the relay coil and correspondingly switched off or switched relay contacts, without affecting the state of the relay contacts thereby.
  • FIG. 3 the course of the test signals P_A and PB are shown for this purpose in the two upper diagrams, while in the two upper diagrams
  • the following ten diagrams each on the left side of the measuring voltages applied to the branch 14, shown for the error-free case and for various error cases, while shown on the right side of each of the respective measured voltages resulting binary response signals for error-free case and for various error cases are.
  • a test signal P_B is first supplied to the second switching device 12b to start a test run.
  • This check signal P_B brings the second switching device 12b into its closed state.
  • the duration of the test signal P_B is in this case such that, even in the event that the first switching device 12a should be permanently short-circuited due to an error, the duration of a current flow resulting from the relay coil 11 has no effect on the state of the relay contacts.
  • the duration of the test signal P_B must therefore be less than the response time of the relay already explained earlier.
  • the duration of a test signal can be chosen between a lower and an upper limit, the lower limit indicating the time required to be used in the test Umsetzz worn 15 to generate a correct binary response signal and the upper limit should be at a sufficiently safe distance from the response time of the relay.
  • the possible range for the duration of the test signals may be between about 40 and about 200 ⁇ s.
  • the delivery of the test signal P_B to the second switching device 12b is ended again after such a short period of time has been selected, followed by a signal pause, during which no test signal is applied to the switching device. facilities 12a or 12b is delivered. Following the switching pause another Prufsignal P_A is delivered to the first switching device 12a, which causes a closing of the switching device 12a.
  • the test signal P_A must also be so short in terms of its duration that even if the second switching device 12b erroneously should be in a permanently short-circuited state, the state of the relay contacts is not affected. The duration of the test signal P_A must therefore also be below the response time of the relay.
  • test signal sequence of the test run is completed; after another pause another test run can be started. For example, it can be provided that a renewed test run is initiated every 250 ⁇ s.
  • the measurement voltage U ⁇ e " s is on a mean voltage level predetermined by the voltage divider 22.
  • the binary response signal BS k0 " is at a high level, since the measurement voltage ⁇ "* is sufficient for the further switching device 24 effetzuêtn.
  • the switching device 12b is closed and the measurement voltage
  • the increase in the measuring voltage ⁇ / * "" is at least not sufficient to cause the further switching device 24 of the converter 15 to be in its current-passing state, so that the binary response signal BS k " n remains at the low level during the signal pause
  • the damping capacitors 27a and 27b are charged comparatively quickly since the upper resistor 22a of the voltage divider 22 is bypassed and the high voltage level V + is directly applied the Dampfungskondensatoren 27 a and
  • the binary response signal is transmitted to the monitoring device 16, which compares the course of the binary response signal with an expected course.
  • Such a comparison can either be carried out continuously during the entire test run or it can be discontinuous only at certain characteristic times in order to save the computation capacity of the monitoring device and to be insensitive to insignificant deviations of the binary response signal from the expected curve Errors in rung 10 were suggestive.
  • the error case Fl is to be considered that the second switching device 12b blocks permanently due to an error.
  • the delivery of a test signal P_B to the second switching device 12b has no effect, since the permanently blocking switching device 12b can not be brought into a current-passing state thereby. Consequently, the corresponding measured voltage U ⁇ ] n remains at the value set by the voltage divider 22 average voltage level and does not decrease as expected by the dashed angege- surrounded course of the correct test voltage U ⁇ k s, to the low voltage level V- from. Accordingly, the binary response signal BS hl remains at its high level.
  • Pruf bornlaufs a binary response signal BS F] which is permanently at the high level.
  • the monitoring device 16 With discontinuous consideration at the times ti and t 2 , the monitoring device 16 detects a deviation of the binary at the time ti
  • the monitoring device 16 closes on a
  • Error in the current path 10 and outputs an error signal to warn the operator of an electrical device containing the electromagnetic relay.
  • the fault case F2 is to be considered that the second switching device 12b is permanently short-circuited, so that a current flow through the switching device 12b is constantly possible.
  • the voltage applied to the branch 14 for this case U TM M is already before the start of the Pruf bornlaufes because of the shorted switching device 12b at the low voltage level V-. Switching on the test signal P_B has no influence on this, since the switching device is in the opened state anyway. Consequently, the resulting binary response signal BS h2 is permanently at its low level before the beginning of the test run as well as during the delivery of the test signal P_B.
  • the state of both the measuring voltage changes M L a -L s auc h the binary response signal BS ri not because the shorted switching device 12 b the branch 14 permanently on the low voltage level V- stop.
  • the delivery of the test signal P_A to the first switching device 12a can not change this; the branch 14 remains permanently at the lower voltage level V- even when the switching device 12a is closed by the short-circuited switching device 12b.
  • the significance of the duration of the test signals can be recognized from this error case F2, since the response time of the relay was exceeded in the case of a test circuit signal P_A which was too long when the switching device 12b was permanently short-circuited and thus the state of the relay contacts was changed unintentionally.
  • the monitoring device 16 is supplied with a permanently low-level binary response signal BS F2 in this error case F2.
  • a deviation is detected at the time t 2 , where the binary response signal BS 12 is at a low level instead of the expected high level.
  • the monitoring device 16 therefore emits an error signal for indicating a fault in the current path 10.
  • the next fault F3 includes the two faults that the switching device 12a permanently locks or a line break in the relay coil 11 is present (or both), so that a current flow through the relay coil 11 is not possible.
  • the delivery of a test signal P_A to the first switching device 12a can not generate a current flow through the switching device 12a and the relay coil 11, so that the charging process the Dampfungskondensatoren continues correspondingly slowly through the resistor 22a 27a and 27b, so that even during the discharge of the voltage present at Prufsignals P_A branch 14 measurement voltage U F ⁇ s is not sufficient in order to control the further switching device 24th
  • the binary response signal BS F3 consequently remains at a low level.
  • the monitoring device 16 is supplied at the times ti and t 2 respectively a low level of the binary response signal BS Fi so that it detects a deviation from the expected course at time t2 and emits an error signal.
  • the fault case F4 should be considered that the first switching device 12a permanently short-circuited is.
  • the measurement voltage C / TM starts already at the high voltage level V + before the start of the test run. Accordingly, the binary response signal BS 1 "4 is at the high level
  • Output of the test signal P_B closes the second switching device 12b and thus lowers the voltage level at the branch 14 to the low voltage level V-. This jump can be recognized correspondingly on the course of the measuring voltage U m ' 4 ss and also on the resulting binary response signal BS r4 .
  • Termination of the test signal P_B blocks the second switching device 12b again, so that the capacitors 27a and 27b are charged very quickly via the permanently short-circuited switching device 12a to the high voltage level V +.
  • the binary response signal BS 14 thus jumps back to the high level already in the signal pause.
  • a delivery of the test signal P_A to the first switching device 12a consequently no longer has any effect on the measuring voltage U F4 SS and the resulting binary response signal BS F4 , since the first switching device 12a is permanently short-circuited anyway and the branch 14 is already at the high voltage level V + located.
  • the Uberwachungsemcardiide 16 is thus supplied in this case error of the course shown in Figure 3 of the binary response signal BS h4 .
  • the monitoring device 16 detects a deviation of the binary response signal BS F4 from the expected course at time ti and outputs an error signal.
  • test start the test signal P_B is first output from the drive device 13 to the second switching device 12b according to step 40.
  • a certain time duration for example 40 ⁇ s
  • P_B is again switched off in step 43.
  • a predetermined time duration for example 40 ⁇ s
  • Step 44 checks to see if the binary response signal is at the expected low level (denoted as "0" in Figure 4), if not, then an error message is output, but if the check in step 44 indicates that the binary response signal is on the the test device PA is turned on in step 45.
  • the test signal P_A is maintained in step 46 for a predetermined period of time, for example 40 ⁇ s again, before being checked by the monitoring device 16 in step 47, whether the binary response signal is at the expected high level (the high level is exemplified by "1" in Figure 4). If a deviation of the binary response signal is detected, an error message is again output. If a correct binary response signal is detected, the test signal P_A is turned off in a next step 48 and the test run is successfully completed ("TEST OK").
  • test procedure can be initiated again with activation of the sequence "TEST start" in order to ensure a permanent check of the current path 10.
  • sequence "TEST start” the sequence "TEST start" in order to ensure a permanent check of the current path 10.
  • the monitoring of the current path 10 for the case of a (wanted) current-carrying relay coil 11 will now be illustrated with reference to FIGS. 5 to 7. Again, the requirement that the check must have no influence on the state of the relay contacts applies again.
  • a so-called pulse-width-modulated holding current can be driven through the relay coil 11 which, averaged over time, produces less power (and thus also less power dissipation in the relay coil) and is sufficient to supply the relay contacts in their activated state.
  • the inertia of the electromagnetic relay is exploited, since the magnetic field in the relay coil 11 - as described above - has degraded so far only after a certain response time that the relay contacts were switched back to their deactivated state, so that with a correspondingly short pulsation, this Talk time is always below and the relay contacts permanently in their activated state.
  • the already pulsed activation of the second switching device 12b is advantageously used as a pulsed test signal PB for monitoring the corresponding measuring voltage U mes at the branch 14.
  • test signal P_A is continuously output while the test signal P B is pulsed.
  • the resulting correct course of the measuring voltage U mus and the resulting correct course of the binary response signal BS corr ' is shown in FIG. 6 in the two diagrams in the second line.
  • the course of the measuring voltage UZ k l 'and the binary response signal BS corr ' will be explained with reference to FIG.
  • the switching device 12a is in its closed state at the beginning of the checking sequence, while the switching device 12b is disabled due to the missing check signal P_B.
  • the high voltage level V + which controls the further switching device 24, is established causes and the binary response signal BS corr 'thus halted at a high level.
  • the test signal P_B is output, the then closed switching device 12b pulls the measuring voltage on the branch 14 to the lower voltage level V- since here the lower resistance 22b of the voltage divider 22 is bridged. Accordingly, both the measuring voltage U ⁇ 'and the resulting binary response signal BS korr ' abruptly decrease. As long as the test signal P_B is output, the measuring voltage at the low voltage level V and the binary response signal BS corr ' remain at the low level.
  • Termination of the test signal P_B blocks the second switching device 12b again.
  • an overvoltage is induced by the sudden interruption of the current flow and the therefore degrading magnetic field, which is a current flow through the resistor 25a and the diode
  • the switching device 12a Since the switching device 12a is kept permanently in its closed state by the delivery of a continuous test signal P_A anyway, a state of the first switching device 12a permanently short-circuited by an error can not be detected by means of the test sequence when the relay coil 11 is current-carrying. However, since this would initially lead to any malfunction of the electromagnetic relay - the first switching device 12a should be permanently short-circuited anyway - the undetectability of such a fault is not a disadvantage of the test run. Such an error was in the above-described review in the de-energized state of the relay coil it can easily be ⁇ known. First, the error case F5 should be treated so that the second switching device 12b is in a permanently locked state.
  • the branch 14 would remain permanently at the high voltage level V + by the intentionally short-circuited switching device 12a. Since outputting the test signal P_B due to the faulty permanently locked second switching device 12b has no influence on the switching state of this second switching device 12b, the measuring voltage f / v at the branch 14 remains independent of the state of the test signal PB at the high voltage level V +. The resulting binary response signal BS F5 thus remains continuously at the high level, so that the monitoring device 16 detects a deviation of the course of the binary response signal BS FS from the expected course. In a discontinuous view of the
  • BS FS which is high instead of low, and may generate an error signal.
  • the error case F6 is to be dealt with that the second switching device 12b is permanently short-circuited.
  • the measuring voltage ⁇ / ⁇ w is independent of the test signal PB at the low voltage level V-, so that the resulting binary response signal BS F6 remains permanently at a low level.
  • the monitoring device 16 can be used in both continuous and discontinuous monitoring of the course of the binary response. Signal thus determine a deviation from the expected course; in a discontinuous view, the monitoring device 16 detects a low level of the binary response signal BS F6 at time t 4 instead of an expected high level, so that an error signal can be output.
  • the fault F7 should be considered that either the relay coil 11 has a line break or the first switching device 12a permanently locks.
  • the measuring voltage U m r e ⁇ ss starts at the branch 14 initially at a set via the voltage divider 22 average voltage level, since the second switching device 12 b blocks the flow of current.
  • the binary response signal BS fl thus starts at a high level.
  • the measuring voltage UJ ' iS at the branch 14 is pulled to the low voltage level V-. This also results in a decrease of the binary response signal BS 11 to the low level.
  • the measuring voltage U ⁇ remains at the low voltage level V- as long as the test signal PB holds the second switching device 12b in the closed state.
  • the steaming capacitor 27b (in the case of a line break in the relay coil 11) or both steaming capacitors (with the first switching device 12a permanently locked) recharge to the average voltage level through the upper resistor 22a of the voltage divider 22.
  • the monitoring device 16 thus detects a Deviation of the binary response signal BS F1 from the expected
  • the monitor 16 detects a low level at time t 4 instead of an expected high level of the binary response signal and may issue an error signal.
  • FIG. 7 shows the sequence of the test passage in the case of a relay coil 11 through which current flows, in the event of a discontinuous monitoring of the binary response signal at the times t 3 and t 4 .
  • the test signal P_B is turned on in a first step 71. After waiting for a short period of time in step 72, a check is made in step 73 as to whether the binary response signal BS has reached a low level ("0").
  • step 72 only has to be dimensioned so long that the response of the binary response signal BS to the second switching device 12b switched on by the test signal P_B can be detected correctly.
  • step 73 If a deviation of the binary response signal BS from the expected low level is detected in step 73 at time t 3 , an error message is output. If, however, the binary response signal BS corresponds to the expected course in step 73, the test signal P_B is switched off again in step 74 after the expiry of a time period sufficient for the generation of the necessary holding current, and a further short period of time is waited in step 76, which is dimensioned such that a reaction of the binary response signal is detectable. In step 77, it is checked whether the binary response signal BS is at the expected high level. If this is not the case, an error is again output. However, if the binary response signal is at the expected high level, the test run is successfully completed and can be restarted after a predetermined period of time.
  • the monitoring device 16 Due to the enabled information exchange between the control device 13 and the monitoring device 16, it is possible for the monitoring device 16 to include the expected course of the binary response signal matching the respective desired state of the relay coil 11 (either currentless or current flowing through) in its check.

Landscapes

  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Relay Circuits (AREA)

Abstract

La présente invention concerne un dispositif de commutation pour contrôler un relais électromagnétique présentant une bobine de relais (11) et des contacts de relais, deux dispositifs de commutation (12a, 12b) étant disposés dans une branche de circuit (10) avec la bobine de relais (11). Un dispositif de contrôle (13) est conçu, lors de la création un courant électrique à travers la bobine de relais (11), pour fermer les deux dispositifs de commutation (12a, 12b) et, lors de l'interruption d'un courant électrique à travers la bobine de relais (11), pour ouvrir les deux dispositifs de commutation (12a, 12b). L'objectif de la présente invention est de créer un dispositif de commutation et un procédé de l'art cité ci-dessus. Pour concevoir un tel dispositif de commutation permettant la vérification prévisionnelle des défauts éventuels de la bobine de relais (11) et des deux dispositifs de commutation (12a, 12b), le dispositif de contrôle (13) est disposé pour l'envoi de signaux de contrôle (P_A, P_B) aux premier et second dispositifs de commutation (12a, 12b). Un dispositif de conversion (15) est alimenté par une tension de mesure (Umess) qui est convertie en un signal de réponse binaire (BS). Un défaut dans la bobine de relais (11) ou dans un des dispositifs de commutation (12a, 12b) est affiché si l'évolution du signal de réponse binaire (BS) diverge de l'évolution attendue. La présente invention concerne également un procédé correspondant pour contrôler un relais électromagnétique.
PCT/EP2007/009999 2007-11-15 2007-11-15 Dispositif de commutation et procédé de contrôle d'un relais électromagnétique WO2009062536A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN200780101582.0A CN101889323B (zh) 2007-11-15 2007-11-15 用于控制电磁继电器的开关设备和方法
EP07846672.9A EP2208215B1 (fr) 2007-11-15 2007-11-15 Dispositif de commutation et procédé de contrôle d'un relais électromagnétique
PCT/EP2007/009999 WO2009062536A1 (fr) 2007-11-15 2007-11-15 Dispositif de commutation et procédé de contrôle d'un relais électromagnétique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/009999 WO2009062536A1 (fr) 2007-11-15 2007-11-15 Dispositif de commutation et procédé de contrôle d'un relais électromagnétique

Publications (1)

Publication Number Publication Date
WO2009062536A1 true WO2009062536A1 (fr) 2009-05-22

Family

ID=39560885

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/009999 WO2009062536A1 (fr) 2007-11-15 2007-11-15 Dispositif de commutation et procédé de contrôle d'un relais électromagnétique

Country Status (3)

Country Link
EP (1) EP2208215B1 (fr)
CN (1) CN101889323B (fr)
WO (1) WO2009062536A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084002A1 (fr) 2010-12-20 2012-06-28 Siemens Aktiengesellschaft Circuit de commande pour un relais électromagnétique
WO2013189527A1 (fr) 2012-06-20 2013-12-27 Siemens Aktiengesellschaft Surveillance d'un relais électromagnétique
CN104022763A (zh) * 2014-06-06 2014-09-03 北京国网富达科技发展有限责任公司 一种便携式升降设备
CN104483883A (zh) * 2014-12-25 2015-04-01 南京因泰莱电器股份有限公司 一种继电器控制单元

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013110993A1 (de) 2013-10-02 2015-04-02 Knorr-Bremse Gmbh Verfahren und Vorrichtung zum Überwachen zumindest eines elektronischen Schaltkontakts für ein Fahrzeug
JP5660236B1 (ja) * 2014-02-27 2015-01-28 オムロン株式会社 電磁継電器の異常検出方法、電磁継電器の異常検出回路、及び、異常検出システム
JP2016011201A (ja) * 2014-06-30 2016-01-21 東芝エレベータ株式会社 乗客コンベア
DE102019209811A1 (de) * 2019-07-04 2021-01-07 Robert Bosch Gmbh Schaltelement, Schaltvorrichtung und Verfahren zum Betrieb der Schaltvorrichtung
CN113053696A (zh) * 2019-12-26 2021-06-29 施耐德电气工业公司 用于接触器的控制电路及其控制方法
CN113285424A (zh) * 2021-05-27 2021-08-20 广东美的厨房电器制造有限公司 供电电路、供电电路的控制方法、烹饪设备和存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0673050A2 (fr) * 1994-03-18 1995-09-20 Schneider Electric Gmbh Circuit pour la commande de relais à sécurité intrinsèque pour des circuits électroniques
DE19632347A1 (de) * 1996-08-10 1998-02-12 Kaco Elektrotechnik Gmbh Schalter, insbesondere Relais
US5748427A (en) * 1996-12-19 1998-05-05 Physio-Control Corporation Method and system for detecting relay failure
JP2000121685A (ja) * 1998-10-13 2000-04-28 Nec Corp リレー故障検出装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19944461C1 (de) * 1999-09-16 2001-01-11 Siemens Ag Überwachungsverfahren für ein elektromagnetisches Schaltgerät und hiermit korrespondierendes elektromagnetisches Schaltgerät

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0673050A2 (fr) * 1994-03-18 1995-09-20 Schneider Electric Gmbh Circuit pour la commande de relais à sécurité intrinsèque pour des circuits électroniques
DE19632347A1 (de) * 1996-08-10 1998-02-12 Kaco Elektrotechnik Gmbh Schalter, insbesondere Relais
US5748427A (en) * 1996-12-19 1998-05-05 Physio-Control Corporation Method and system for detecting relay failure
JP2000121685A (ja) * 1998-10-13 2000-04-28 Nec Corp リレー故障検出装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084002A1 (fr) 2010-12-20 2012-06-28 Siemens Aktiengesellschaft Circuit de commande pour un relais électromagnétique
US8988844B2 (en) 2010-12-20 2015-03-24 Siemens Aktiengesellschaft Drive circuit for an electromagnetic relay
RU2553274C2 (ru) * 2010-12-20 2015-06-10 Сименс Акциенгезелльшафт Схема управления для электромагнитного реле
WO2013189527A1 (fr) 2012-06-20 2013-12-27 Siemens Aktiengesellschaft Surveillance d'un relais électromagnétique
CN104022763A (zh) * 2014-06-06 2014-09-03 北京国网富达科技发展有限责任公司 一种便携式升降设备
CN104483883A (zh) * 2014-12-25 2015-04-01 南京因泰莱电器股份有限公司 一种继电器控制单元
CN104483883B (zh) * 2014-12-25 2017-04-05 南京因泰莱电器股份有限公司 一种继电器控制单元

Also Published As

Publication number Publication date
EP2208215A1 (fr) 2010-07-21
CN101889323B (zh) 2013-06-19
CN101889323A (zh) 2010-11-17
EP2208215B1 (fr) 2016-01-13

Similar Documents

Publication Publication Date Title
EP2208215B1 (fr) Dispositif de commutation et procédé de contrôle d'un relais électromagnétique
DE102005055325B3 (de) Sicherheitsschaltvorrichtung zum fehlersicheren Abschalten eines elektrischen Verbrauchers
EP2519960B1 (fr) Dispositif de contrôle de circuit électrique, dispositif de commutation pour l'alimentation d'un récepteur et procédé de fonctionnement d'un dispositif de commutation
EP1269274B2 (fr) Interrupteur de securite et procede pour ajuster un mode de fonctionnement pour interrupteur de securite
WO2001037302A1 (fr) Commutateur de securite servant a la mise sous tension et a la mise hors tension de securite d'un recepteur electrique, en particulier d'une machine a entrainement electrique
EP2089653B1 (fr) Procédé et montage permettant une commande fiable d'actionneurs, de capteurs et/ou de récepteurs dans un appareil électro-ménager les contenant
DE102016102417B4 (de) Schutzschaltung für ein Photovoltaik (PV)-Modul, Verfahren zum Betrieb der Schutzschaltung und Photovoltaik (PV)-Anlage mit einer derartigen Schutzschaltung
DE102016216331B3 (de) Trennvorrichtung zur Stromunterbrechung, Schutzschalter mit einem Sensor und einer Trennvorrichtung sowie Verfahren zum Betrieb einer Trennvorrichtung
DE10210920A1 (de) Leistungsschalter mit elektronischem Auslöser und Bypass-Schaltung
EP3043220A1 (fr) Dispositif et procédé de surveillance fonctionnelle d'un moyen de commutation de sécurité
DE1513708C3 (de) Phasenvergleich-Schutzanordnung
DE102020111941B3 (de) Bordnetz für ein Kraftfahrzeug sowie Verfahren zum Betreiben eines Bordnetzes
EP2656365B1 (fr) Circuit de commande d'un relais électromagnétique
DE102016119877A1 (de) Vorrichtung zur Detektion und Kommunikation
EP0505774A1 (fr) Dispositif de commutation de sécurité
WO2002011165A1 (fr) Commutateur de securite pour la mise hors-circuit sure d'une charge electrique, en particulier d'une machine a entrainement electrique
EP2215533B1 (fr) Dispositif de commande pour un système de commutation de sécurité à surveillance intégrée de la tension d'alimentation
DE10261454A1 (de) Motorsteuerung mit sicherem Halt
EP3742466B1 (fr) Ensemble de circuit permettant de commuter de manière sécurisée un consommateur électrique selon une mesure de sécurité
EP3288057A1 (fr) Commutateur oriente vers la securite
DE10261452A1 (de) Motorsteuerung mit einer Steuereinrichtung und einer Sicherheitsvorrichtung zum sicheren Abschalten eines Motors
DE102018109107B3 (de) Überwachungsvorrichtung und Verfahren zum Überwachen eines Solargenerators auf Erdfehler
DE10218806B4 (de) Gleichstrom-Schnellschalteinrichtung für Bahnstromversorgungen und Verfahren zur Abschaltung von Gleichströmen
DE10261451A1 (de) Anordnung aus einer Sicherheits-Schaltvorrichtung und einer Vorrichtung zum selbsttätigen Prüfen der Funktionsfähigkeit der Sicherheits-Schaltvorrichtung
WO2023011768A1 (fr) Unité de disjoncteur

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780101582.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07846672

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2007846672

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 1616/KOLNP/2010

Country of ref document: IN

NENP Non-entry into the national phase

Ref country code: DE