EP3422382A1 - Procédé et dispositif de commande pour la commutation d'un contacteur - Google Patents

Procédé et dispositif de commande pour la commutation d'un contacteur Download PDF

Info

Publication number
EP3422382A1
EP3422382A1 EP17178249.3A EP17178249A EP3422382A1 EP 3422382 A1 EP3422382 A1 EP 3422382A1 EP 17178249 A EP17178249 A EP 17178249A EP 3422382 A1 EP3422382 A1 EP 3422382A1
Authority
EP
European Patent Office
Prior art keywords
contactor
control voltage
time
period
measuring interval
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17178249.3A
Other languages
German (de)
English (en)
Other versions
EP3422382B1 (fr
Inventor
Gunnar Johansson
Aravindh VISHNU
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 EP17178249.3A priority Critical patent/EP3422382B1/fr
Priority to PCT/EP2018/062912 priority patent/WO2019001841A1/fr
Priority to CN201880040452.9A priority patent/CN110914949B/zh
Publication of EP3422382A1 publication Critical patent/EP3422382A1/fr
Application granted granted Critical
Publication of EP3422382B1 publication Critical patent/EP3422382B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • H01H47/02—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
    • H01H47/18—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 for introducing delay in the operation of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/86—Means for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H2009/566—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle with self learning, e.g. measured delay is used in later actuations

Definitions

  • the technology disclosed herein relates generally to the field of contactors used in electrical networks, and in particular to a method for switching a contactor, a control device for controlling the contactor, computer program and computer program product.
  • a contactor is an electrically controlled switch device that is used for switching an electrical load connected to an electric circuit.
  • the electrical load may, for instance, be a three-phase load.
  • the contactor comprises a contact unit, in turn comprising a number of main contacts, for instance, three main contacts.
  • the main contacts are configured such as to connect or disconnect the electrical load to/from a main electric network.
  • the contactor further comprises an actuating unit comprising a coil for actuating the main contacts.
  • the electronic control circuit of the contactor is used for controlling the voltage supplied to the coil.
  • a control voltage of the electronic control circuit is supplied by an electric circuit drawn from, for instance, one or two of three phases.
  • each of the main contacts connected to a respective one of the three phases may switch, i.e. open or close, at almost the same phase angle in many of its switching operations.
  • the electrical load or burden on each of the main contacts will therefore differ substantially, which results in substantially different arc energies. Consequently, the main contact that is the most electrically affected one is subject to higher erosion than the other two main contacts. Therefore, the thickness of the contact material of the most affected main contact may decrease faster. This leads to different, i.e. uneven, erosion levels of different main contacts.
  • the service time of the contactor is therefore limited by the main contact that fails first.
  • EP 2 856 483 B1 discloses a low voltage contactor and is an example on the above described contactor.
  • the contactor is used for disconnecting a three phase load from an electric power source.
  • the electronic control circuit controlling the voltage that is supplied to the coil implements a pre-arranged time point selection scheme and is adapted to select a time point from the pre-arranged time point selection scheme as a time delay and initiate an instant opening command based on the selected time point.
  • An objective of the present invention is to provide improvements in switching of a contactor. It is a particular objective to ensure uniform wear of all contacts of the contactor, thereby prolonging the service time of the contactor.
  • the objective is according to an aspect achieved by a method for switching a contactor.
  • the method is performed by a control device controlling a control voltage supplied to a coil of the contactor.
  • the coil is energized and de-energized to control the switching of contacts of the contactor.
  • the method comprises: determining a reference point of time t1 based on a delay time ⁇ T wherein a starting point of the delay time ⁇ T is set in relation to a start-up of the method, estimating a period Tp of the control voltage, determining a duration of a measuring interval Tm based on the estimated period Tp of the control voltage, setting starting point of a first measuring interval Tm based on the reference point of time t1, and setting starting points of subsequent measuring intervals equal to end point of an immediately preceding measuring interval, obtaining measurements on the control voltage for the duration of the measuring interval Tm, and switching the contactor based on measurements made during the measuring interval Tm.
  • the method provides a number of advantages. For instance, erosions and heat generated by electric arcs are distributed evenly on each of the contacts in a deterministic way, which increases the service life of the contactor.
  • the method also provides a reduced product cost by enabling a decrease of the amount of silver typically used in these contacts.
  • the method comprises obtaining the delay time ⁇ T from a predetermined set of N values, by selecting from the set a delay time ⁇ T that is different than the preceding selected delay time ⁇ T.
  • This gives non-random, i.e. deterministic, starting points, which in turn ensures switching at different points along the voltage forms, thereby ensuring to largest extent equal wear on the main contacts.
  • the starting point of the delay time ⁇ T may thus be related to, for instance, the start up-time and an off-set time, which, for instance, may comprise time for initiation of electronics etc.
  • the estimating the period Tp of the control voltage comprises one of:
  • the period Tp of the control voltage is determined independently of the reference point of time t1.
  • the obtaining measurements on the control voltage for the duration of the measuring interval Tm is de-synchronized with zero crossings of the period of the control voltage.
  • the obtaining measurements comprise accumulating root means square, RMS, values. In other embodiments, the obtaining measurements comprise accumulating mean values.
  • the criterion for switching the contactor is one of: the control voltage falling below a lower bound nominal voltage value for a predetermined time period, the control voltage falling below a lower bound nominal voltage value for more than 30 ms, a switch command having been stable for a predefined time period and a switch command having been stable for 4 ms.
  • the objective is according to an aspect achieved by a computer program for a control device for controlling a contactor.
  • the computer program comprises computer program code, which, when run on at processing circuitry of the control device causes control device to perform the method as above.
  • a computer program product comprises a computer program as above and a computer readable means on which the computer program is stored.
  • the objective is according to an aspect achieved by a control device for switching a contactor.
  • the control device controls a control voltage supplied to a coil of the contactor.
  • the control device is configured to energize and de-energize the coil to control the switching of contacts of the contactor, the control device being further configured to obtain a time point from a time point selection scheme comprising a plurality of time points distributed in a half period of the control voltage, initiate switching of the contactor using the obtained time point as a time delay, and upon determining that a criterion for switching the contactor is met, initiate an instant switching command at same time point on the half period of the control voltage as the obtained time point.
  • the method comprises: determining a reference point of time t1 based on a delay time ⁇ T wherein a starting point of the delay time ⁇ T is set in relation to a start-up of the method, estimating a period Tp of the control voltage, determining a duration of a measuring interval Tm based on the estimated period Tp of the control voltage, setting starting point of a first measuring interval Tm based on the reference point of time t1, and setting starting points of subsequent measuring intervals equal to end point of an immediately preceding measuring interval, obtaining measurements on the control voltage for the duration of the measuring interval Tm, and switching the contactor based on measurements made during the measuring interval Tm.
  • FIG. 1 illustrates a contactor 1 and a control device 20 for switching the contactor 1 according to embodiments of the invention.
  • the contactor 1 is a low-voltage contactor and is used for connecting and disconnecting an electric load 2.
  • the electric load 2 may, for instance, be a motor, but it is noted that the electric load 2 can be of any type.
  • the electric load 2 is connected to a main electric network having one or more phases. In the particular illustrated case the main electric network has three phases L1, L2, L3, but it may, in other embodiments, have one, two, four or more phases.
  • the contactor 1 is thus an electrically controlled switch used for switching an electrical circuit or electrical device with high current ratings.
  • the contactor 1 is controlled by an electronic control device 20 (in the following also denoted control circuit 20) having a much lower power level than the electric circuit or device (i.e. load 2) that is being switched by the contactor 1.
  • the control circuit 20 is configured to control a voltage, or more generally a power, that is supplied to a coil 10 of the contactor 1.
  • the contactor 1 comprises contacts, i.e. the current carrying part of the contactor 1, and a mechanism (for instance an electromagnet or coil) for closing and opening these contacts.
  • the contactor 1 illustrated in figure 1 comprises three main contacts 12 1 , 12 2 , 12 3 (although it is noted that there could be more or fewer main contacts as well) connected to a respective one of the three phases L1, L2, L3 of the main electric network.
  • the contactor 1 further comprises an actuating unit 3 comprising a coil 10 and a first magnet core 16 and a second magnet core 14.
  • the first magnet core 16 is a fixed magnet core 16 and the second magnet core 14 is a movable magnet core 14.
  • the coil 10 is typically wound around a part of the fixed magnet core 16.
  • Each of the main contacts 12 1 , 12 2 , 12 3 comprises a fixed contact and a movable contact, wherein each movable contact is connected to the movable core 14.
  • the coil 10, the fixed magnet core 16 and the movable magnet core 14 are arranged for actuating the main contacts 12 1 , 12 2 , 12 3 and thereby perform connection and disconnection operations.
  • the contactor 1 may also comprise a demagnetization circuit, which speeds up the opening of the contactor 1.
  • the contactor 1 When the contactor 1 is "open” it is in a non-conducting position, and when it is “closed” it is conducting, i.e. the main electric network (and hence the electric load) are in normal operation. It is noted that the contactor 1 may be "normally-open” or "normally-closed”; the “normal” state is when the coil 10 is de-energized. As long as current passes through the coil 10 a magnetic field is produced, which attracts the movable magnet core 14 to the fixed magnet core 16. When the contactor coil 10 is de-energized, gravity or a spring returns the movable magnet core 14 to its initial position and opens the main contacts 12.
  • the main electric network is used as supplier of a voltage to the control circuit 20, wherein the voltage supply is shown (in figure 1 ) to comprise a connection to a neutral and a connection to one of the phases L1.
  • the voltage to the electronic control circuit 20 can be provided in other ways as well, for example from two of the three phases or from a transformer (not shown) that is connected between the control circuit 20 and e.g. two of the phases of the main electric network.
  • the present invention provides a method and a control device for switching the contactor 1 as described above, for operating a load 2, for instance a three-phase load.
  • the contactor 1 comprises an actuating unit 3 comprising a coil 10, wherein main contacts 12 1 , 12 2 , 12 3 are operated by the coil 10 and the control circuit 1 for controlling a control voltage supplied to the coil 10.
  • the invention provides an improved way of initiating switching commands when controlling the coil 10 of the contactor 1.
  • Low voltage is commonly defined in a range of up to about 1000V AC.
  • FIG. 2 illustrates a phase voltage (among y-axis) of the main electric network as a function of time (x-axis).
  • This phase voltage is the voltage that the main contacts 12 1 , 12 2 , 12 3 are exposed to.
  • the voltage used for controlling the contactor 1 (denoted control voltage) is typically derived from the main voltage U mains (of the electric network).
  • the decision to switch the contactor 1, i.e. decision to close or open the contactor 1, is based on measurements on the control voltage. For instance, a mean value or a Root-Mean-Square (RMS) value of the main electric network instantaneous voltage or true RMS value or RMS value based on the amplitude of U mains or RMS value based on the mean value can be calculated based on the measurements, so the switching command (opening/closing command) can only be given when the RMS or mean value (or other suitable value). has been calculated.
  • the RMS or mean value is calculated at the end of a sliding window (shown in figure 3 ).
  • an initial variable delay ⁇ T is used. In figure 2 , this delay is illustrated as a time period ⁇ T.
  • the contactor switching command is given by the control circuit 20.
  • the duration of the delay ⁇ T should be evenly distributed within the control voltage half period.
  • the delay ⁇ T should have a different value than the delay ⁇ T used in the preceding switching.
  • FIG. 3 illustrate main aspects and different embodiments of the present invention.
  • the control circuit 20 In order to determine if the contactor 1 should be switching, the control circuit 20 is arranged to keep track of the supply voltage. Therefore, the control circuit 20 continuously measures the control voltage (which, as noted, is a fraction of the voltage U mains ) and determines the RMS value of the voltage amplitude. As has been noted earlier, an alternative to determining the RMS value is to instead determine the mean value or some other measure, but in the following the RMS value is used as an example for describing embodiments of the invention. A first process continuously measures and filters the half period of the control voltage waveform and a second process uses the filtered period as input for calculating an updated, i.e. a current, RMS value.
  • a demagnetization circuit is activated. For example, it may be decided to switch the contactor 1 when the voltage has been below 55% of the lower bound nominal voltage for more than 1, 2, 3 or more measurement intervals (each of which may, for instance, be about 30 ms) or when a programmable logic controller (PLC) switch command has been stable for a defined time period, e.g. stable for 4ms. It is however noted that other criteria may be used for deciding when the contactor 1 should open the electrical circuit, and such criteria may, for instance, depend on the application at hand.
  • PLC programmable logic controller
  • the control voltage values are accumulated during a measuring interval Tm.
  • the half period Tp of the control voltage is measured and filtered (denoted "first process" earlier). This may, for instance, be done by use of an infinite impulse response (IIR) filter.
  • the half period Tp is simply the time that passes between, for instance, two consecutive zero crossings (or between two consecutive maximum values) and this value is fed into the IIR filter.
  • half Period filt 1 4 ⁇ half Period new + 3 4 ⁇ half Period prev wherein:
  • the half period Tp is continuously calculated and is used as input in order to know for how long time the control voltage values should be accumulated during the measuring interval Tm (denoted "second process" earlier). Since the voltage waveform is either alternating current (AC) or rectified AC or direct current (DC), the voltage values accumulated during the (sliding) measuring interval Tm would be equal to voltage values accumulated between two consecutive zero crossings (or, as noted earlier, between two consecutive maximum values).
  • the case with DC may be treated with a time-out period that is longer than an expected maximum period for possible AC voltages, and time-out value may then set equal to the period. As a particular example: the period for a 50 Hz AC voltage is 20 ms, i.e. the half period is 10 ms, and the time-out value may then be set e.g. to about 12 ms.
  • the lowermost graph of figure 3 illustrates that in a subsequent initiation of the method 30, a different delay value ⁇ T is obtained from the set of N such delay values.
  • the measuring interval Tm therefore starts at a different point on the voltage waveform (later point in the illustrated example).
  • the voltage is only positive because it is rectified in, for instance, a printed circuit board (PCB) and then input to control device 20.
  • PCB printed circuit board
  • An advantage of the method is that as soon as the measuring result is obtained and a switching command (opening or closing command) should to be issued, the command can be issued immediately.
  • Figure 4 is a flow chart over steps of an embodiment of a method for switching a contactor according to an embodiment of the invention.
  • a method 30 for switching a contactor 1 is provided.
  • the method 30 is performed by a control device 20 arranged for controlling a control voltage supplied to a coil 10 of the contactor 1, wherein the coil 10 is energized and de-energized to control the switching of the contactor 1.
  • the method 30 comprises determining 31a reference point of time t1 based on a delay time ⁇ T wherein a starting point of the delay time ⁇ T is set in relation to a starting point to of the method 30.
  • the reference point of time t1 (see e.g. figure 3 ) may, for instance, be set equal to the sum of the time point to at start-up of the method 30 (e.g. at initial start-up of the contactor 1 or when performing a switching operation) and the value of the delay time ⁇ T.
  • the reference point of time t1 will be at a different point along the half period graph over the control voltage.
  • the delay time ⁇ T may have a value within the interval of 0-10 ms.
  • the method 30 comprises estimating 32 a period Tp of the control voltage.
  • the half period and hence the period can be estimated by determining time period between two consecutive zero crossings or the time period between two consecutive maximum values of the control voltage waveform.
  • the estimation of the period Tp of the control voltage is made essentially independently of the reference point of time t1. That is, there is essentially no synchronization, which gives a more even wear of the main contacts.
  • the method 30 comprises determining 33 a duration of a measuring interval Tm based on the estimated period Tp of the control voltage.
  • the duration of the measuring interval Tm, during which measurements are to be made, may be set equal to the duration of the estimated period Tp of the control voltage.
  • the method 30 comprises setting 34 starting point of a first measuring interval Tm based on the reference point of time t1 and setting starting points of subsequent measuring intervals equal to the end point of an immediately preceding measuring interval.
  • the starting point of the first measuring interval Tm is equal to t1, which in turn is equal to to + delay ⁇ T.
  • the end point t2 of the first measuring interval is also the starting point of the second measuring interval, and so on.
  • the method 30 comprises obtaining 35 measurements on the control voltage for the duration of the measuring interval Tm.
  • the method 30 comprises switching 36 the contactor 1 based on measurements made during the measuring interval Tm.
  • a decision to switch (open or close) the contactor 1 is based on the measurements on the control voltage. This decision is taken at the end of the measuring interval Tm.
  • the delay time ⁇ T is obtained from a predetermined set of N values, from which set a delay time ⁇ T different than the preceding delay time ⁇ T is selected.
  • another value from the set of values is selected. This can be made by cyclically traversing all values, or by ensuring in some other deterministic way that the same delay time ⁇ T is not used for consecutive switching operations.
  • the obtaining of the delay time ⁇ T may, for instance, comprise retrieving a value from a predetermined table (stored in e.g. a database or data storage accessible to the control device), and then traversing all available values in any order until all values have been used before starting to re-use the delay time ⁇ T values.
  • a predetermined table stored in e.g. a database or data storage accessible to the control device
  • the method 30 initiates the switching of the contactor 1 and instant switching commands based on a pre-arranged time point selection scheme that comprises a plurality of time points distributed in a half period of the control voltage of the control circuit 1, the instant switching commands are distributed to each of the main contacts 12. Erosions and heat generated by arcs are thereby distributed evenly on each of the one or more main contacts 12 1 , 12 2 , 12 3 in a deterministic way, which increases the service life of the contactor 1.
  • the time point selection scheme for a half period of control voltage may comprise following time points corresponding to the sequence: ⁇ (0°, 60°, 120°), (10°, 70°, 130°) (20°, 80°, 140°) (30°, 90°, 150°), (40°, 100° 160°), (50°, 110°, 170°) ⁇ .
  • the scheme comprises six groups.
  • the pre-determined interval in this sequence in each group is 60°, while the pre-defined offset for the corresponding time points of two successive groups is 10°.
  • the pre-defined offset is calculated based on a phase angle in a range of 5°-15° in order to have a complete coverage of the main contacts 12 1 , 12 2 , 12 3 so that opening commands are initiated and distributed on each of the main contacts 12 1 , 12 2 , 12 3 .
  • an offset calculated based on a phase angle 30° will result in only two different groups, which does not enable well-distributed opening commands on each of the main contacts 12 1 , 12 2 , 12 3 .
  • control device 20 is provided.
  • the control device 20 is configured to perform the embodiments of the described method 30.
  • the control device 20 comprises processing circuitry 21, which may be any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), etc., capable of executing software instructions stored in a computer program product 22, e.g. in the form of a storage medium 22.
  • the processing circuitry 21 may further be provided as at least one application specific integrated circuit (ASIC), or field programmable gate array (FPGA).
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the processing circuitry 21 is configured to cause the control device 20 to perform a set of operations, or steps, e.g. as described in relation to figure 4 .
  • the storage medium 22 may store the set of operations
  • the processing circuitry 21 may be configured to retrieve the set of operations from the storage medium 22 to cause the control device 20 to perform the set of operations.
  • the set of operations may be provided as a set of executable instructions.
  • the processing circuitry 21 is thereby arranged to execute the various embodiments of the method 30 as disclosed herein.
  • the storage medium 22 may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.
  • the control device 20 may also comprise an input/output means 24 for receiving data input and for outputting data, e.g. receiving information and/or sending commands/instructions.
  • the control device 20 may also comprise circuitry such as voltage and threshold accumulators.
  • a control device 20 is thus provided for switching a contactor 1.
  • the control device 20 is arranged for controlling a control voltage supplied to a coil 10 of the contactor 1.
  • the control device 20 is configured to energize and de-energize the coil 10 to control the switching of contacts 12 1 , 12 2 , 12 3 of the contactor 1.
  • the control device 20 is further configured to:
  • the control device 20 may be configured to perform the above steps, and implement any of the described embodiments of the method 30, e.g. by comprising one or more processors 20 (or processing circuitry) and memory 21, the memory 21 containing instructions executable by the processor 20, whereby the control device 20 is operative to perform the steps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Keying Circuit Devices (AREA)
  • Relay Circuits (AREA)
EP17178249.3A 2017-06-28 2017-06-28 Procédé et dispositif de commande pour la commutation d'un contacteur Active EP3422382B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17178249.3A EP3422382B1 (fr) 2017-06-28 2017-06-28 Procédé et dispositif de commande pour la commutation d'un contacteur
PCT/EP2018/062912 WO2019001841A1 (fr) 2017-06-28 2018-05-17 Procédé et dispositif de commande de commutation d'un contacteur
CN201880040452.9A CN110914949B (zh) 2017-06-28 2018-05-17 用于切换接触器的方法及控制装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17178249.3A EP3422382B1 (fr) 2017-06-28 2017-06-28 Procédé et dispositif de commande pour la commutation d'un contacteur

Publications (2)

Publication Number Publication Date
EP3422382A1 true EP3422382A1 (fr) 2019-01-02
EP3422382B1 EP3422382B1 (fr) 2020-03-25

Family

ID=59284999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17178249.3A Active EP3422382B1 (fr) 2017-06-28 2017-06-28 Procédé et dispositif de commande pour la commutation d'un contacteur

Country Status (3)

Country Link
EP (1) EP3422382B1 (fr)
CN (1) CN110914949B (fr)
WO (1) WO2019001841A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113937771A (zh) * 2020-06-29 2022-01-14 北京金风科创风电设备有限公司 风力发电机组变流器滤波电容投切控制方法、装置和系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001001431A1 (fr) * 1999-06-25 2001-01-04 Siemens Aktiengesellschaft Procede de declenchement pour un contacteur et circuit contacteur correspondant
US20030174457A1 (en) * 2000-06-16 2003-09-18 Reinhard Herbst Method for operating an electromagnetic switching device and electromagnetic switching device
US6671157B1 (en) * 1999-07-26 2003-12-30 Moeller Gmbh Method for effecting an electronic drive control
WO2013178255A1 (fr) 2012-05-30 2013-12-05 Abb Research Ltd Procédé et dispositif de commutation d'un contacteur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10141143B2 (en) * 2014-11-06 2018-11-27 Rockwell Automation Technologies, Inc. Wear-balanced electromagnetic motor control switching

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001001431A1 (fr) * 1999-06-25 2001-01-04 Siemens Aktiengesellschaft Procede de declenchement pour un contacteur et circuit contacteur correspondant
US6671157B1 (en) * 1999-07-26 2003-12-30 Moeller Gmbh Method for effecting an electronic drive control
US20030174457A1 (en) * 2000-06-16 2003-09-18 Reinhard Herbst Method for operating an electromagnetic switching device and electromagnetic switching device
WO2013178255A1 (fr) 2012-05-30 2013-12-05 Abb Research Ltd Procédé et dispositif de commutation d'un contacteur
US20150155115A1 (en) * 2012-05-30 2015-06-04 Gunnar Johansson Method And Device For Switching A Contactor

Also Published As

Publication number Publication date
EP3422382B1 (fr) 2020-03-25
WO2019001841A1 (fr) 2019-01-03
CN110914949A (zh) 2020-03-24
CN110914949B (zh) 2021-03-12

Similar Documents

Publication Publication Date Title
US10866284B2 (en) Temperature-based electromagnetic switching
US10361051B2 (en) Single pole, single current path switching system and method
US10074497B2 (en) Operator coil parameter based electromagnetic switching
US10141143B2 (en) Wear-balanced electromagnetic motor control switching
US9806642B2 (en) Modular multiple single-pole electromagnetic switching system and method
US20160134205A1 (en) Detection of electric motor short circuits
US9722513B2 (en) Torque-based stepwise motor starting
US5440180A (en) Microprocessor based electrical contactor with distributed contactor opening
US9748873B2 (en) 5-pole based wye-delta motor starting system and method
EP3422382B1 (fr) Procédé et dispositif de commande pour la commutation d'un contacteur
EP2062347B1 (fr) Procede et dispositif de reduction de l'influence d'une composante continue dans un courant de charge d'un moteur asynchrone triphase
MXPA06002635A (es) Monitor para ciclo de trabajo y derivacion para mantenimiento preventivo para un regulador de voltaje.
CN101897114B (zh) 用于借助于相位截止控制来运行电驱动装置的方法和装置
EP3439165B1 (fr) Démarreur de moteur à pcb
EP2299459A1 (fr) Dispositif et procédé pour contrôler l'état de contact électrique
CA2495606C (fr) Dispositif de regulation de puissance commande a phase et procede pour reduire les ondes harmoniques
CN106898512A (zh) 用于多相开关装置的电弧能量减少方法及设备
KR20170122005A (ko) 차단기 시험장치
CN113421794A (zh) 一种智能交流接触器自适应分断控制方法
JPH06301430A (ja) 電力制御装置
AU2015282647A1 (en) Method and device for testing a tap changer of a transformer
EP4297216A1 (fr) Réduction de courant d'appel d'un transformateur
CN110880398B (zh) 用于低压和中压应用的线圈致动器
CN117293778A (zh) 减少变压器浪涌电流
JP3059505B2 (ja) トライアックの耐久試験装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190702

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20191024

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAL Information related to payment of fee for publishing/printing deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR3

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

GRAR Information related to intention to grant a patent recorded

Free format text: ORIGINAL CODE: EPIDOSNIGR71

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

INTC Intention to grant announced (deleted)
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

INTG Intention to grant announced

Effective date: 20200217

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1249540

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200415

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602017013477

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200625

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200625

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200626

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200325

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200818

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200725

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1249540

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200325

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602017013477

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

26N No opposition filed

Effective date: 20210112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200628

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200628

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200630

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20210628

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210628

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200325

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240619

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20240628

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20240625

Year of fee payment: 8