EP3671798A1 - Dispositif de commutation mv de type électromagnétique - Google Patents

Dispositif de commutation mv de type électromagnétique Download PDF

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Publication number
EP3671798A1
EP3671798A1 EP18215166.2A EP18215166A EP3671798A1 EP 3671798 A1 EP3671798 A1 EP 3671798A1 EP 18215166 A EP18215166 A EP 18215166A EP 3671798 A1 EP3671798 A1 EP 3671798A1
Authority
EP
European Patent Office
Prior art keywords
switching device
coil arrangement
conditioning circuit
reference position
circuit
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.)
Withdrawn
Application number
EP18215166.2A
Other languages
German (de)
English (en)
Inventor
Massimiliano Villano
Roberto Penzo
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP18215166.2A priority Critical patent/EP3671798A1/fr
Publication of EP3671798A1 publication Critical patent/EP3671798A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • 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
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil

Definitions

  • the present invention relates to the field of switching devices for medium voltage applications, such as circuit breakers, contactors, disconnectors, reclosers or the like.
  • the present invention relates to a medium voltage switching device of electromagnetic type.
  • medium voltage identifies voltages higher than 1 kV AC and 1.5 kV DC up to tens of kV, e.g. 72 kV AC and 100 kV DC.
  • a MV switching device of the electromagnetic type comprises an electromagnetic actuator for coupling or uncoupling the electric contacts of the switching device during switching operations.
  • the electromagnetic actuator comprises a magnetic core provided with an excitation coil operatively associated to a movable plunger mechanically coupled to the mobile contacts of the switching device.
  • suitably arranged power supply means provide an excitation current to the excitation coil.
  • the magnetic field which is induced by the excitation current circulating in the excitation coil, generates a force that operates the movable plunger to carry out a switching operation.
  • the movable plunger can be reversibly moved between two stable operative positions, each corresponding to a coupling or uncoupling position of the electric contacts and, therefore, to a closing or opening condition of the switching device.
  • control unit of the switching device which controls switching operations, generally needs to obtain data related to the actual position of the movable contact.
  • proximity sensors such as magnetic sensors
  • micro-switches are adopted to sense the position of the movable plunger. This solution shows drawbacks in term of sensing reliability and wiring complexity and entails high industrial costs as well.
  • the actual position of the movable contact is determined in a sensorless manner (i.e. without the arrangement of dedicated position sensors) by suitably processing diagnostic information indicative of the operating status of the electromagnetic actuator of the switching device.
  • these devices perform their functions in a satisfying way, there are some aspects to improve.
  • these devices have proven to be able to determine the position of the movable contact with a relatively low level of accuracy in certain critical conditions, e.g. during an opening manoeuvre of the switching device, in particular when the movable contact is at a certain distance from the fixed contact (e.g. at a distance higher than 15 mm).
  • the switching device comprises: A switching device for medium voltage applications comprising:
  • said electromagnetic actuator comprises a conditioning circuit adapted to modify the electric behaviour of said coil arrangement when said conditioning circuit is electrically connected with said coil arrangement.
  • said conditioning circuit is electrically connected with or disconnected from said coil arrangement, when said movable contact reaches or overruns a reference position during a switching operation of said switching device.
  • said conditioning circuit is electrically connected with said coil arrangement, when said movable contact reaches or overruns said reference position, during an opening manoeuvre of said switching device.
  • said conditioning circuit is electrically disconnected from said coil arrangement, when said movable contact reaches or overruns said reference position, during a closing manoeuvre of said switching device.
  • said conditioning circuit is adapted to cause variations of the impedance and the inductance values of said coil arrangement with respect to characteristic inductance values of said coil arrangement, when said conditioning circuit is electrically connected with said coil arrangement.
  • said conditioning circuit consists of a RLC circuit including a conditioning coil, a capacitor and a resistor electrically connected in series.
  • said electromagnetic actuator comprises a micro-mechanical switch actuatable by said movable plunger to electrically connect or electrically disconnect said conditioning circuit with or from said coil arrangement.
  • said micro-mechanical switch electrically connects said conditioning circuit with said coil arrangement, when said movable contact reaches or overruns said reference position during an opening manoeuvre of said switching device.
  • said micro-mechanical switch electrically disconnects said conditioning circuit from said coil arrangement, when said movable contact reaches or overruns said reference position during a closing manoeuvre of said switching device.
  • said electromagnetic actuator comprises an energy discharger circuit that is electrically connectable with or disconnectable from said conditioning circuit.
  • said energy discharger circuit is electrically connected with said conditioning circuit, when said conditioning circuit is electrically disconnected from said coil arrangement.
  • said energy discharger circuit is electrically disconnected from said conditioning circuit, when said conditioning circuit is electrically connected with said coil arrangement.
  • said micro-mechanical switch is actuatable by said movable plunger to electrically connect or electrically disconnect said energy discharger circuit with or from said conditioning circuit.
  • said micro-mechanical switch electrically disconnects said energy discharger circuit from said conditioning circuit, when said movable contact reaches or overruns said reference position during an opening manoeuvre of said switching device.
  • said micro-mechanical switch electrically connects said energy discharger circuit with said conditioning circuit, when said movable contact reaches or overruns said reference position during a closing manoeuvre of said switching device.
  • said control unit is adapted to carry out a determination method of the position of said mobile contact during an opening operation of said switching device, said determination method comprising the following steps:
  • said control unit may be adapted to carry out a determination method of the position of said mobile contact during a closing operation of said switching device, said determination method comprising the following steps:
  • the present invention is related to a switching device 1 for medium voltage applications (here referred to as "MV switching device” or “switching device” for the sake of simplicity).
  • the MV switching device 1 comprises one or more electric poles, each of which comprises a movable contact 11 and a fixed contact 12, which are electrically connectable to a conductor (e.g. a phase conductor) of a power distribution line (not shown).
  • a conductor e.g. a phase conductor
  • the movable contact 11 and the fixed contact 12 are adapted to be coupled or uncoupled respectively during switching operations of the switching device 1.
  • a switching operation may be a closing manoeuvre ( figure 5 ), in which the contacts 11, 12 are brought from an uncoupled condition to a coupled condition, or an opening manoeuvre ( figure 4 ), in which the contacts 11 and 12 are brought from a coupled condition to an uncoupled condition.
  • the switching device 1 When the contacts 11, 12 are in a coupled or uncoupled condition, the switching device 1 is in a closing condition ( figure 3 ) or in an opening condition ( figure 2 ), respectively.
  • the switching device 1 comprises an electromagnetic actuator 13 that comprises a magnetic core 131, a coil arrangement 132 wound around the magnetic core 131 and a movable plunger 133 operatively coupled to each movable contact 11 of each electric pole through a corresponding kinematic chain 15.
  • the coil arrangement of the electromagnetic actuator 13 comprises at least an excitation coil wound around the magnetic core 131.
  • an excitation current I E circulates in the coil arrangement 132 (namely in said excitation coil) in order to generate a magnetic flux.
  • the magnetic core 131 properly directs the streamlines of the magnetic flux so generated, in such a way that the movable plunger 133 is operated by a force generated by the magnetic flux enchained with the magnetic core 131 and the movable plunger 133.
  • the above-mentioned coil arrangement 132 includes only said excitation coil.
  • said excitation coil may operate as a test coil and it may be supplied also with one or more test signals ST to check the electric behaviour of said coil arrangement, e.g. to measure the impedance values Z T and inductance values L T of said coil arrangement.
  • the above-mentioned coil arrangement 132 may include a dedicated test coil in addition to said excitation coil. In this case, such a test coil may be supplied also with the test signals ST to measure the impedance values Z T and inductance values L T of said coil arrangement.
  • the movable plunger 133 is operated between two positions, which correspond to a coupled condition or an uncoupled condition of the electric contacts 11, 12 and, therefore, to a closing condition or an opening condition of the switching device 1.
  • One or more permanent magnets may be conveniently arranged in the proximity of the magnetic core to generate a permanent magnetic force always directed at steadily maintaining the movable plunger 133 in the position reached at the end of its run, when a switching operation is carried out.
  • the switching device 1 comprises power supply means 17 that supply the electric energy needed to generate the excitation current I E for the coil arrangement 132 during a switching operation.
  • the switching device 1 comprises control unit 14 for controlling the operation of the switching device 1.
  • control unit 14 when a switching operation (i.e. a closing or an opening operation) has to be carried out, the control unit 14 provides control signals to a driving circuit (not shown) to supply the excitation current I E to the coil arrangement 132 by exploiting electric energy provided by the power supply means 17.
  • control unit 14 comprises computerised means (not shown) including digital processing resources (such as one or more microprocessors) adapted to execute suitable software instructions to generate command/data signals to manage the operating life of the switching device 1.
  • digital processing resources such as one or more microprocessors
  • control unit 14 comprises said driving circuit (not shown) electrically connected with the coil arrangement 132.
  • said driving circuit may be directly controlled by the above-mentioned computerised means.
  • it may be controlled by a dedicated control circuit that is in turn controlled by the above-mentioned computerised means.
  • control unit 14 is capable of providing one or more test signals ST to the coil arrangement 132.
  • test signals ST have a completely different nature with respect to the excitation current I E provided to the excitation coil 132 to operate the movable plunger 133 during a switching operation of the switching devices 1.
  • the test signals ST are electric signals (voltage or current signals) having a very small magnitude (amplitude or intensity) and a completely different waveform with respect to the excitation current I E .
  • the test signals ST may be pulsed voltage signals having an amplitude of 200 V and a frequency of 100 Hz.
  • the electromagnetic actuator 13 comprises a conditioning circuit 135 adapted to modify the electric behaviour of the coil arrangement 132, when electrically connected with said coil arrangement.
  • the conditioning circuit 135 is electrically connected with the coil arrangement 132, when the movable contact 11 reaches or overruns a reference position P, during a switching operation of the switching device 1.
  • the reference position P is set in proximity of position reached by the movable contact 11 when the switching device 1 is in an opening condition.
  • the reference position P may be set at a distance of 15-20 mm from the fixed contact 12.
  • the conditioning circuit 135 is electrically connected with the coil arrangement 132, when the movable contact 11 reaches or overruns the reference position P while moving away from the fixed contact 12, during an opening manoeuvre of the switching device 1 ( figure 4 ).
  • the conditioning circuit 135 is electrically connected with the coil arrangement 132 ( figure 2 ).
  • the conditioning circuit 135 is electrically disconnected from the coil arrangement 132, when the movable contact 11 reaches or overruns the reference position P while moving towards the fixed contact 12, during a closing manoeuvre of the switching device 1 ( figure 5 ).
  • the conditioning circuit 135 is electrically disconnected with the coil arrangement 132 ( figure 3 ).
  • the electromagnetic actuator 13 comprises a micro-mechanical switch 136 actuatable to electrically connect or electrically disconnect the conditioning circuit 135 with or from said coil arrangement 132.
  • micro-mechanical switch 136 is actuated by the movable plunger 133.
  • the micro-mechanical switch 136 may be directly actuated by the movable plunger 133, for example by means of an actuating element (not shown) coupled with the movable plunger, e.g. an actuating ring or plate or rod solidly fixed with the movable plunger.
  • micro-mechanical switch 136 may be indirectly actuated by the movable plunger 133, for example by means of a suitable actuation mechanism operatively coupleable with said movable plunger or by the movable contact 11.
  • the micro-mechanical switch 136 may be of known type, e.g. a spring micro-switch, and it will not be described in further details for the reasons of brevity.
  • the micro-mechanical switch 136 is actuatable in a first switching position A, at which it electrically connects the conditioning circuit 135 in parallel with the coil arrangement 132, or in a second switching position B, at which it electrically disconnects the conditioning circuit 135 from the coil arrangement 132.
  • the micro-mechanical switch 136 is actuated in the switching position A when the movable contact 11 reaches or overruns the reference position P, while moving away from the fixed contact 12, during an opening manoeuvre of the switching device 1 ( figure 4 ).
  • the micro-mechanical switch 136 is actuated in the switching position B when the movable contact 11 reaches or overruns the reference position P, while moving towards the fixed contact 12, during a closing manoeuvre of the switching device 1 ( figure 5 ).
  • the conditioning circuit 135 is adapted to modify the electric behaviour of the coil arrangement 132, when it is electrically connected (preferably in parallel) with this latter.
  • the conditioning circuit 135, when electrically connected in parallel with the coil arrangement 132, is adapted to cause variations ⁇ Z and ⁇ L of the impedance values and inductance values of said coil arrangement with respect to its characteristic impedance values Z TC and characteristic inductance values L TC .
  • characteristic impedance values and “characteristic inductance values” intend respectively the impedance values Z TC and the inductance values L TC , which are measured in response to the application of a test signal with given voltage and operating frequency and expected for the coil arrangement 132 in absence of the conditioning circuit 135.
  • the conditioning circuit 135 comprises a conditioning coil 1350 wound around the magnetic core 131 in parallel with the coil arrangement 132.
  • the conditioning circuit 135 is formed by a RLC circuit including the conditioning coil 1350, a capacitor 1352 and a resistor 1351 electrically connected in series with the conditioning coil 1350.
  • the arrangement of the RLC circuit is quite advantageous as it allows a suitable control of the overall impedance shown by the conditioning circuit 135 when an AC test voltage V L (at a given operating frequency) is applied at its terminals.
  • the capacitor 1352 allows interrupting or limiting the flow of currents in case of failures (safety self-healing) whereas the resistor 1351 allows limiting the current circulating along the conditioning coil 1350.
  • the conditioning circuit 135 (namely the RLC circuit thereof) is designed in such a way to cause relevant variations ⁇ Z and ⁇ L of impedance and inductance values of the coil arrangement 132 (i.e. variations ⁇ Z and ⁇ L exceeding given corresponding threshold values Z TH and L TH ) in such a way to be easily detectable when an AC test voltage V L (at a given operating frequency) is applied to said coil arrangement.
  • Figures 8 , 9 schematically represent the electric behaviour of the coil arrangement 132 and the conditioning circuit 135 for different switching positions A, B of the micro-mechanical switch 136.
  • the conditioning circuit 135 is electrically connected in parallel with the coil arrangement 132.
  • the conditioning circuit 135 causes a variation of the characteristic impedance and inductance values Z TC and L TC of the coil arrangement 132.
  • the conditioning circuit 135 is electrically disconnected from the coil arrangement 132.
  • the conditioning circuit 135 does not cause any variation of the characteristic impedance and inductance values Z TC and L TC of the coil arrangement 132.
  • the electromagnetic actuator 13 comprises an energy discharger circuit 137 adapted to be electrically connected with or disconnected from the conditioning circuit 135.
  • the energy discharger circuit 137 is electrically connected (preferably in parallel) with the conditioning circuit 135, when this latter is electrically disconnected from the coil arrangement 132.
  • the energy discharger circuit 137 is adapted to form a closed loop circuit in cooperation with the conditioning circuit 135, when it is electrically connected in parallel with this latter.
  • the conditioning coil 1350 and the capacitor 1352 included in the conditioning circuit 135 may be suitably discharged after having been excited (when the conditioning circuit 135 is electrically connected in parallel with the coil arrangement 132).
  • the energy discharger circuit 137 may be of known type. As an example, it may include one or more shunt resistors.
  • the micro-mechanical switch 136 is actuatable by the movable plunger 133 to electrically connect or disconnect the energy discharger circuit 137 with or from the conditioning circuit 135.
  • the micro-mechanical switch 136 electrically disconnects the energy discharger circuit 137 from the conditioning circuit 135, when it is actuated in the first switching position A, i.e. when the movable contact 11 reaches or overruns the reference position P, while moving away from the fixed contact 12, during an opening manoeuvre of the switching device 1 ( figures 4 , 12 ).
  • the micro-mechanical switch 136 electrically connects the energy discharger circuit 137 with the conditioning circuit 135, when it is actuated in the first switching position B, i.e. when the movable contact 11 reaches or overruns the reference position P, while moving away from the fixed contact 12, during an opening manoeuvre of the switching device 1 ( figures 5 , 13 ).
  • Figures 12 , 13 schematically represent the electric behaviour of the coil arrangement 132, the conditioning circuit 135 and the energy discharger circuit 137 for different switching positions of the micro-mechanical switch 136.
  • the conditioning circuit 135 When the micro-mechanical switch 136 is in the switching position A, the conditioning circuit 135 is electrically connected in parallel with the coil arrangement 132 whereas the energy discharger circuit 137 is electrically disconnected from the conditioning circuit 135.
  • the conditioning circuit 135 causes a variation of the characteristic impedance and inductance values of the coil arrangement 132, as discussed above, whereas the energy discharger circuit 137 does not impact of the operation of the conditioning circuit 135 and the coil arrangement 132.
  • the conditioning circuit 135 When the micro-mechanical switch 136 is in the switching position B, the conditioning circuit 135 is electrically disconnected from with the coil arrangement 132 and it is electrically in parallel with the energy discharger circuit 137 to form a closed loop circuit in cooperation with this latter.
  • a transient discharge current I D thus temporarily flows along the conditioning circuit 135, in particular along the conditioning coil 1350 and the capacitor 1352.
  • the energy discharger circuit 137 is designed to allow the discharge current I D to flow and dissipate the energy stored in the conditioning coil 1350. In this way, the conditioning circuit 135 will not influence the next opening manoeuvre of the switching device.
  • control uni 14 are adapted to execute suitable software instructions to execute the determination methods 100, 101.
  • control unit 14 is adapted to carry out a determination method 100 of the position of said mobile contact 11, during an opening operation of said switching device.
  • the determination method 100 comprises the following steps:
  • > L TH , where Z T , Z TC are respectively the measured impedance values and the characteristic values of the coil arrangement 132 and L T , L TC are respectively the measured inductance values and the characteristic values of the coil arrangement 132.
  • the mobile contact 11 has not reached the reference position P while moving away from the fixed contact 12.
  • the actual position of the mobile contact 11 may be estimated or determined in a known manner.
  • the actual position of the mobile contact 11 may thus be determined, even if no dedicated position sensors are arranged. To this aim, it is sufficient to properly set the reference position P.
  • the determination method 100 allows exactly determining when the movable contact 11 is almost at the end of its run and the switching device 1 is close to an opening condition.
  • the step of measuring the impedance values Z T and inductance values L T of the coil arrangement 132 comprises the following sub-steps:
  • the test signal ST has a waveform capable of exciting the magnetic circuit 131, 132, 133 of the electromagnetic actuator 13 to generate a magnetic flux.
  • the test signal ST is a signal having a pulsed waveform.
  • the frequency, duty-cycle and amplitude of the pulses of the test signal ST are advantageously selected on the base of the magnetic characteristics of the magnetic circuit 131, 132, 133.
  • the test signal ST is a voltage signal applied at the terminals of the coil arrangement 132.
  • the transmission of the test signal ST causes the application of an AC test voltage V L (having the same frequency of the test signal ST) at the terminals of the coil arrangement 132, thereby causing the circulation of a current I L (having the same frequency of the test signal ST) along this latter.
  • a current I L3 (having the same frequency of the test signal ST) circulates along the conditioning circuit 135.
  • a current I L3 does not need to be measured as its basic function is to excite the conditioning coil 1350 and determine relevant variations of the overall inductance seen at the terminals of the coil arrangement 132.
  • the coil arrangement 132 is constantly fed with the test signal ST during the observation period of time T O , which may be, as an example, of 20 ms.
  • the switching device 1 comprises sensing means 16 operatively coupled with the control unit 14 and adapted to acquire the measuring data M.
  • Such sensing means may comprise a current sensor and/or a voltage sensor configured to provide suitable sensing signals to the computerised means of the control unit 14.
  • the sensing signals provided by the current and voltage sensors are respectively indicative the sum of the current I L circulating in the coil arrangement 132 and the current I L3 circulating in the conditioning circuit 135 and indicative of the voltage V L actually applied at the terminals of the coil arrangement 132 in response to the transmission of the test signal ST.
  • the control unit 14 is adapted to receive the sensing signals transmitted by the sensing means 16 and obtain the measuring data M by processing the sensing signals received from the sensing means 16.
  • the measuring data M are obtained at a plurality of subsequent sampling instants comprised in the observation period T O , which have a sampling period T S (e.g. 0.1 ms) set by the computerised means of the control unit 14
  • the calculation of the impedance values Z T and inductance values L T of the coil arrangement 132, basing on said measuring data M, may conveniently employ calculation algorithms of known type.
  • the step of checking whether the measured the impedance values Z T and inductance values L T show relevant variations with respect to the characteristic impedance values Z TC and inductance values L TC of the coil arrangement 132 comprises comparing the measured the impedance values Z T and inductance values L T with the characteristic impedance values Z TC and inductance values L TC , which may be stored in a memory.
  • control unit 14 is adapted to carry out a determination method 101 of the position of said mobile contact 11, during a closing operation of said switching device.
  • determination method 101 comprises the following steps:
  • the mobile contact 11 has not reached the reference position P while moving towards the fixed contact 12.
  • the actual position of the mobile contact 11 may be estimated or determined in a known manner.
  • the actual position of the mobile contact 11 may thus be determined, even if no dedicated position sensors are arranged. To this aim, it is sufficient to properly set the reference position P.
  • determination method 101 may be carried out by the control unit 14 in a similar way with respect to the steps of the above-described determination step 100.
  • control unit 14 is adapted to carry out at least the above-described determination method 100 of the position of said mobile contact 11, during an opening operation of said switching device.
  • control unit 14 is adapted to carry out the determination method 101 of the position of said mobile contact 11, during a closing operation of said switching device.
  • the switching device 1 is initially supposed to be in a closing condition ( figure 3 ).
  • the micro-mechanical switch 136 is in the switching position B and the conditioning circuit 135 is electrically disconnected from the coil arrangement 132.
  • control unit 14 can execute the determination process 100.
  • the micro-mechanical switch 136 remains in the switching position B and the conditioning circuit 135 remains electrically disconnected from the coil arrangement 132.
  • the conditioning circuit 135 does not cause any variations of the electric behaviour of the coil arrangement 132.
  • the impedance values Z T and the inductance values L T of the coil arrangement 132 which are measured by the control unit 14, do not show relevant variations with respect to characteristic values Z TC and L TC of said coil arrangement.
  • the control unit 14 determines that the movable contact 11 has not reached the reference position P while moving away from the fixed contact 12.
  • the conditioning circuit 135 is electrically connected in parallel with the coil arrangement 132.
  • the conditioning circuit 135 is now capable of modifying the electric behaviour of the coil arrangement 132.
  • the impedance values Z T and inductance values L T of the coil arrangement 132 which are continuously measured by the control unit 14, show relevant variations with respect to the characteristic values Z TC and L TC .
  • the control unit 14 determines that the movable contact 11 has reached (and possibly overrun) the reference position P while moving away from the fixed contact 12. Conveniently, the conditioning circuit 135 remains electrically connected in parallel with the coil arrangement 132 up to the completion of the opening manoeuvre and while the switching device 1 is in the opening condition ( figure 2 ).
  • the switching device 1 is now supposed to be in an opening condition ( figure 2 ).
  • the micro-mechanical switch 136 is in the switching position A and the conditioning circuit 135 is electrically connected with the coil arrangement 132.
  • the conditioning circuit 135 electrically disconnects from the coil arrangement 132 and it remains in this switching position B.
  • the energy discharger circuit 137 suitably facilitates the transient discharging process of the conditioning coil 1350 and of the capacitor 1352 included in the conditioning circuit 135.
  • control unit 100 may execute the determination process 101.
  • the control unit 14 determines that the movable contact 11 has not reached the reference position P while moving towards the fixed contact 12.
  • the control unit 14 determines that the movable contact 11 has reached or overrun the reference position P while moving towards the fixed contact 12.
  • the position of the mobile contact 11 may be determined with a high level of accuracy even in critical operating, e.g. during an opening manoeuvre when the mobile contact 11 is at a large distance from the fixed contact.
  • the conditioning circuit 135 allows determining the position of the mobile contact 11 in the above-mentioned critical conditions without adopting dedicated position sensors.
  • the determination methods 100, 101 of the position of the movable contact 11 can be easily implemented in practice and they require relative small calculation resources for being carried out by the processing unit 14.
  • the conditioning circuit 135 has a compact structure that and it may be produced at industrial level at competitive costs.
  • Th switching device 1 is thus relatively simple and cheap to produce at industrial level with respect to similar devices of the state of the art.

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EP18215166.2A 2018-12-21 2018-12-21 Dispositif de commutation mv de type électromagnétique Withdrawn EP3671798A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18215166.2A EP3671798A1 (fr) 2018-12-21 2018-12-21 Dispositif de commutation mv de type électromagnétique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18215166.2A EP3671798A1 (fr) 2018-12-21 2018-12-21 Dispositif de commutation mv de type électromagnétique

Publications (1)

Publication Number Publication Date
EP3671798A1 true EP3671798A1 (fr) 2020-06-24

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EP18215166.2A Withdrawn EP3671798A1 (fr) 2018-12-21 2018-12-21 Dispositif de commutation mv de type électromagnétique

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113612411A (zh) * 2021-07-13 2021-11-05 湖南科太电气有限公司 一种移磁调压软起动及定位装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2983187A2 (fr) * 2014-08-05 2016-02-10 Tyco Electronics (Shanghai) Co. Ltd. Contacteur, ensemble contacteur et circuit de commande
EP2998977A1 (fr) 2014-09-19 2016-03-23 ABB Technology AG Procédé permettant de déterminer le statut de fonctionnement d'un dispositif de commutation (mv) de type électromagnétique
FR3054369A1 (fr) * 2016-07-20 2018-01-26 Zodiac Aero Electric Contacteur electromagnetique dote de moyens de detection de la position ouverte ou fermee de commutateurs commandes
EP3319110A1 (fr) * 2016-11-03 2018-05-09 Rockwell Automation Switzerland GmbH Circuit de filtrage destiné à supprimer le courant d'appel, circuit de commande de bobine à courant continu et contacteur électromagnétique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2983187A2 (fr) * 2014-08-05 2016-02-10 Tyco Electronics (Shanghai) Co. Ltd. Contacteur, ensemble contacteur et circuit de commande
EP2998977A1 (fr) 2014-09-19 2016-03-23 ABB Technology AG Procédé permettant de déterminer le statut de fonctionnement d'un dispositif de commutation (mv) de type électromagnétique
FR3054369A1 (fr) * 2016-07-20 2018-01-26 Zodiac Aero Electric Contacteur electromagnetique dote de moyens de detection de la position ouverte ou fermee de commutateurs commandes
EP3319110A1 (fr) * 2016-11-03 2018-05-09 Rockwell Automation Switzerland GmbH Circuit de filtrage destiné à supprimer le courant d'appel, circuit de commande de bobine à courant continu et contacteur électromagnétique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113612411A (zh) * 2021-07-13 2021-11-05 湖南科太电气有限公司 一种移磁调压软起动及定位装置
CN113612411B (zh) * 2021-07-13 2024-03-08 湖南科太电气有限公司 一种移磁调压软起动及定位装置

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