EP3963617A1 - Drive system for a switch, and method for driving a switch - Google Patents
Drive system for a switch, and method for driving a switchInfo
- Publication number
- EP3963617A1 EP3963617A1 EP20721217.6A EP20721217A EP3963617A1 EP 3963617 A1 EP3963617 A1 EP 3963617A1 EP 20721217 A EP20721217 A EP 20721217A EP 3963617 A1 EP3963617 A1 EP 3963617A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- encoder
- value
- switch
- drive system
- 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
Links
- 238000000034 method Methods 0.000 title claims description 22
- 238000004804 winding Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
-
- 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
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
- H01H2003/266—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor having control circuits for motor operating switches, e.g. controlling the opening or closing speed 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
- H01H9/0005—Tap change devices
- H01H2009/0061—Monitoring tap change switching devices
Definitions
- the invention relates to a drive system for a switch and a method for driving a switch.
- switches for different tasks and with different requirements. To operate the respective switches, they must be driven by a drive system. These switches are, among other things, on-load tap-changers, diverter switches, selector switches, double-turners, reversers, preselectors, circuit-breakers, load switches or disconnectors.
- On-load tap-changers are used, for example, to switch between different winding taps of electrical equipment, such as a power transformer or a controllable choke, without interruption.
- electrical equipment such as a power transformer or a controllable choke
- Double turners are used to reverse the polarity of windings while the power transformer is in operation. All these switches represent a highly safety-relevant component of the electrical equipment. The switchover takes place while the equipment is in operation and is accordingly connected to an energy network, for example. In extreme cases, operational disruptions can have serious technical and economic consequences. It is therefore an object of the present invention to provide an improved concept for driving a switch, by means of which the safety of the operation is increased.
- Another object of the invention is to provide a method, a method for driving at least one switch, which provides an improved concept for driving a switch, by means of which the flexibility of the drive and the safety of the switching are increased.
- a method for driving at least one switch which comprises the features of claim 10.
- the improved concept is based on the idea of equipping a drive shaft for driving the switch with a feedback system which is able to detect at least one value for a position of the drive shaft.
- the operation of the motor is influenced based on a feedback signal which is generated as a function of the value.
- a drive system for the switch is provided.
- the drive system has a drive shaft which connects the drive system to the switch, a motor for driving the drive shaft and a feedback system.
- the feedback system is set up to determine at least one value for a position of the drive shaft and to generate a feedback signal based on the at least one value.
- the drive system has a control device which is set up to act on operation of the motor as a function of the feedback signal.
- the switch can be designed as an on-load tap-changer or a diverter switch or a selector or a double turner or a reverser or a preselector or a circuit breaker or a load switch or a disconnector.
- values for the position of the drive shaft also includes those values of measured variables from which the position of the drive shaft can be clearly determined, possibly within a tolerance range.
- the drive system serves to drive a shaft of the switch, for example an on-load tap-changer or a corresponding component of the on-load tap-changer.
- This causes the on-load tap-changer, for example, to perform one or more operations, for example a switchover between two winding taps of an item of equipment or parts of the switchover, such as a load switchover, a selector actuation, preselector actuation or a double-reverser actuation.
- the drive shaft is connected directly or indirectly, in particular via one or more gears, to the switch, in particular the shaft of the switch.
- the drive shaft is directly or indirectly, in particular via one or more gearboxes, with the diverter switch, selector, double turner, turner, circuit breaker, load switch or disconnector, in particular the shaft of the diverter switch, selector, double turner, reverser, circuit breaker, load switch ters or circuit breaker.
- the drive shaft is connected directly or indirectly, in particular via one or more gears, to the motor, in particular to a motor shaft of the motor.
- a position, in particular an absolute position, of the motor shaft corresponds to a position, in particular an absolute position, of the drive shaft. This means that the position of the motor shaft can be clearly deduced from the position of the motor shaft, possibly within a tolerance range.
- the action includes controlling, regulating, braking, accelerating or stopping the motor.
- the regulation can include, for example, position regulation, speed regulation, acceleration regulation or torque regulation.
- the drive system is a servo drive system.
- the drive system comprises a monitoring unit which is set up to use the feedback signal to monitor the one or more operations of the switch, on-load tap-changer, diverter switch, selector, double-reverser, reverser, preselector, circuit breaker, load switch or disconnector.
- the monitoring includes, in particular, a monitoring to determine whether individual operations or parts thereof are being carried out properly, in particular within predefined time windows.
- the control device comprises a control unit and a power unit for the controlled or regulated supply of energy to the motor.
- the control unit is set up to control the power section as a function of at least one setpoint value, in particular a position, speed or acceleration setpoint.
- the power section is designed as a converter or servo converter or as an equivalent electronic, in particular fully electronic, unit for drive machines.
- the control device contains the feedback system in whole or in part.
- the feedback system is set up to determine a first value for the position of the drive shaft according to a first method.
- the value for the position of the drive shaft is a value for an absolute position of the drive shaft.
- the value for the position of the drive shaft is an incremental value for a position of the drive shaft or a value for a relative position of the drive shaft.
- the feedback system is set up to determine a rotor position of the motor and thus to determine a value for the position of the drive shaft as a function of the rotor position.
- the rotor position is an angular range in which a rotor of the motor is located, optionally combined with a number of complete rotations of the rotor.
- the position or absolute position of the motor shaft can thus be determined with an accuracy of at least 180 °, for example by the control device.
- the accuracy of the position of the drive shaft that can be achieved by means of one or more gears is significantly greater.
- the evaluation by the control device corresponds to a certain extent to a virtual encoder function. This combination is also known as a virtual rotary encoder.
- the feedback system includes an encoder that is an absolute encoder and that is set up and arranged to detect the absolute position of the drive shaft or an absolute position of a further shaft that is connected to the drive shaft and based on the detected position generate at least one output signal.
- the feedback system is set up to determine the value for the position of the drive shaft for the absolute position on the basis of the at least one output signal.
- the encoder is attached directly or indirectly to the motor shaft, the drive shaft or a shaft coupled to it.
- the transmitter has a first output for outputting the first value for the absolute position.
- encoder includes both devices that determine two values for the position in different ways and devices that contain two separate encoders, at least one of which is an absolute encoder.
- the encoder comprises an absolute encoder or a multiturn encoder or a singleturn encoder.
- the encoder is set up to detect the position of the drive shaft or the position of the further shaft using a first scanning method.
- the scanning method includes an optical, a magnetic, a capacitive, a resistive or an inductive scanning method.
- the encoder is positively connected to the drive shaft, the motor shaft or the further shaft. According to at least one embodiment, the encoder is additionally connected to the drive shaft, the motor shaft or the further shaft in a force-locking or material-locking manner, for example by an adhesive connection.
- the form-fitting and additional material or force-fitting connection further increases the attachment of the encoder and ultimately the operational reliability.
- the feedback system is set up to determine at least one value for a position of the drive shaft by means of a transmitter and an auxiliary contact and to generate a feedback signal based on the at least one value.
- the transmitter and the auxiliary contact can each generate a separate value, the values then being combined into one value in order to generate a feedback signal based on this value.
- the respective value of the encoder and the value of the auxiliary contact which in combination represent the position of the drive shaft, can directly generate a common feedback signal.
- the drive system has a control device which is set up as a function of the feedback signal, which is based on a common value of the transmitter and the Auxiliary contact or the respective individual values to act on the operation of the motor.
- the inventive idea can be implemented with a wide variety of hardware. Ultimately, this increases the operational reliability of the drive system, the switch and the equipment.
- the feedback system is set up to determine a first value by the transmitter using a first method and to determine the at least second value using the auxiliary contact using a second method. The values are then combined into one value.
- the methods can differ in terms of different technical or physical principles or different components (hardware components).
- the first value of the transmitter for the position of the drive shaft is a first value for an absolute position of the drive shaft.
- the second value of the auxiliary contact for the position of the drive shaft is a second value for a relative position of the drive shaft.
- the first and the second value form a value for the absolute position of the drive shaft.
- the feedback system is set up to determine a rotor position of the motor and to determine one of the at least two values for the position of the drive shaft as a function of the rotor position.
- the feedback system here has an encoder, which is a so-called virtual rotary encoder.
- the feedback system includes a transmitter and an auxiliary contact which are set up and arranged to detect the absolute position of the drive shaft or an absolute position of a further shaft connected to the drive shaft in combination and based on the detected position generate at least one output signal.
- the transmitter and the auxiliary contact are attached directly or indirectly to the motor shaft, the drive shaft or a shaft coupled to it.
- the transmitter has a first output for output if the first value and the auxiliary contact would give a second output for outputting the second value, the values forming the absolute position of the drive shaft.
- the auxiliary contact is set up to additionally detect the position of the drive shaft or the position of the further shaft with the aid of a scanning method.
- the scanning method includes a mechanical, an optical, a magnetic, a capacitive, a resistive or an inductive scanning method.
- the auxiliary switch is additionally connected to the drive shaft, the motor shaft or the further shaft in a non-positive manner or materially, for example by means of an adhesive connection.
- a method for driving an on-load tap-changer comprises determining at least one value for an absolute position of a drive shaft for driving the on-load tap-changer, generating a feedback signal based on the at least one value, and controlling a motor for driving the on-load tap-changer as a function of the feedback signal.
- Further configurations and implementations of the method result directly from the various configurations of the tap changer arrangement.
- one or more of the components and / or arrangements described with regard to the tap changer arrangement can be implemented accordingly for carrying out the method.
- the invention is explained in detail on the basis of exemplary embodiments with reference to the drawings. Components that are identical or functionally identical or have an identical effect can be provided with identical reference symbols. Identical components or components with identical functions may only be explained with reference to the figure in which they first appear. The explanation is not necessarily repeated in the following figures.
- FIG. 1 shows a schematic representation of an exemplary embodiment of a drive system according to the improved concept
- FIG. 2 shows a schematic representation of a further exemplary embodiment of a drive system according to the improved concept.
- FIG. 1 shows a schematic illustration of an exemplary embodiment of a drive system 3 for a switch 1.
- the drive system 3 is connected to the switch 1 via a drive shaft 16.
- the drive system 3 includes a motor 12 which can drive the drive shaft 16 via a motor shaft 14 and optionally via a gearbox 15.
- a control device 2 of the drive system 3 comprises a power unit 1 1, which contains, for example, a converter (not shown) for the controlled or regulated supply of energy to the motor 12, as well as a control unit 10 to control the power unit 1 1, for example via a bus 18.
- the drive system 3 has a transmitter 13 which serves as a feedback system 4 or is part of the feedback system 4 and is connected to the power unit 11. Furthermore, the encoder 13 is coupled directly or indirectly to the drive shaft 16.
- the transmitter 13 is set up to detect at least one first value for a position, in particular an angular position, for example an absolute angular position of the drive shaft 16.
- the encoder 13 can include, for example, an absolute encoder, in particular a multi-turn absolute encoder, which is attached to the drive shaft 16, the motor shaft 14 or another shaft whose position is clearly linked to the absolute position of the drive shaft 16 is.
- the position of the drive shaft 16 can be clearly determined from the position of the motor shaft 14, for example via a transmission ratio of the transmission.
- the feedback system 4 is set up to detect a value for the position of the drive shaft 16.
- the control device 2 in particular the control unit 10 and / or the power unit 1 1, are set up to control or regulate the motor 12 as a function of a feedback signal which the feedback system 4 generates based on the value.
- FIG. 2 shows another schematic representation of an exemplary embodiment of a drive system 3.
- an auxiliary switch 9 can be provided in addition to the encoder 13, which is designed as an absolute encoder, multi-turn absolute encoder, single-turn absolute encoder or single-turn encoder or incremental encoder or virtual encoder.
- the drive system 3 thus has a transmitter 13 and an auxiliary switch 9, which serve as a feedback system 4 or are part of the feedback system 4 and are connected to the power unit 11.
- the auxiliary switch 9 can be designed as at least one microswitch or a resolver or a sin-cos encoder.
- the position of the drive shaft 16 can be clearly determined by means of the transmitter 13 in connection with the auxiliary switch 9.
- control device 2 can be set up to determine a value for the position of the drive shaft 16 from a rotor position of the motor 12. This would be the aforementioned encoder 13, which is designed as a virtual rotary encoder.
- inductive feedback through the movement of the rotor in the motor windings of the motor 12 can be used. Since the strength of the feedback varies periodically, the rotor position can be determined approximately by means of signal analysis, for example FFT analysis. Since one full revolution of the drive shaft 16 corresponds to a large number of revolutions of the rotor, the position of the drive shaft 16 can be inferred therefrom with much greater accuracy.
- an auxiliary switch 9 can supplement the determination of the position of the drive shaft 16.
- the control device 2 in particular the control unit 10 and / or the power unit 11, is set up to control or regulate the motor 12 as a function of a feedback signal which the feedback system 4 generates based on the first value.
- the value is generated by an output signal from a transmitter 13 or by an output signal from a transmitter 13 in conjunction with an auxiliary switch 9.
- control unit 11 power unit 12 motor
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019112716.5A DE102019112716A1 (en) | 2019-05-15 | 2019-05-15 | Drive system for a switch and a method for driving a switch |
PCT/EP2020/061293 WO2020229130A1 (en) | 2019-05-15 | 2020-04-23 | Drive system for a switch, and method for driving a switch |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3963617A1 true EP3963617A1 (en) | 2022-03-09 |
EP3963617B1 EP3963617B1 (en) | 2023-11-01 |
EP3963617C0 EP3963617C0 (en) | 2023-11-01 |
Family
ID=70456784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20721217.6A Active EP3963617B1 (en) | 2019-05-15 | 2020-04-23 | Drive system for a switch, and method for driving a switch |
Country Status (8)
Country | Link |
---|---|
US (1) | US11908642B2 (en) |
EP (1) | EP3963617B1 (en) |
JP (1) | JP2022533533A (en) |
KR (1) | KR20220006644A (en) |
CN (1) | CN113795901A (en) |
BR (1) | BR112021020588A2 (en) |
DE (1) | DE102019112716A1 (en) |
WO (1) | WO2020229130A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021101237B3 (en) * | 2021-01-21 | 2022-06-09 | Maschinenfabrik Reinhausen Gmbh | SWITCH ARRANGEMENT WITH LOAD TAP SWITCH AND DRIVE SYSTEM |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1147531B1 (en) * | 1998-12-16 | 2005-07-06 | Abb Ab | Operating device for driving and controlling an electrical switching apparatus |
US7109670B1 (en) * | 2005-05-25 | 2006-09-19 | Rockwell Automation Technologies, Inc. | Motor drive with velocity-second compensation |
WO2008024048A1 (en) | 2006-08-25 | 2008-02-28 | Abb Technology Ltd | Electric motor drive unit for on-load tap-changers |
WO2012135209A1 (en) * | 2011-03-27 | 2012-10-04 | Abb Technology Ag | Tap changer with an improved drive system |
-
2019
- 2019-05-15 DE DE102019112716.5A patent/DE102019112716A1/en active Pending
-
2020
- 2020-04-23 WO PCT/EP2020/061293 patent/WO2020229130A1/en unknown
- 2020-04-23 US US17/610,725 patent/US11908642B2/en active Active
- 2020-04-23 CN CN202080034531.6A patent/CN113795901A/en active Pending
- 2020-04-23 BR BR112021020588A patent/BR112021020588A2/en unknown
- 2020-04-23 EP EP20721217.6A patent/EP3963617B1/en active Active
- 2020-04-23 KR KR1020217040957A patent/KR20220006644A/en unknown
- 2020-04-23 JP JP2021563635A patent/JP2022533533A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
EP3963617B1 (en) | 2023-11-01 |
JP2022533533A (en) | 2022-07-25 |
CN113795901A (en) | 2021-12-14 |
US11908642B2 (en) | 2024-02-20 |
KR20220006644A (en) | 2022-01-17 |
US20220223356A1 (en) | 2022-07-14 |
BR112021020588A2 (en) | 2021-12-07 |
EP3963617C0 (en) | 2023-11-01 |
DE102019112716A1 (en) | 2020-11-19 |
WO2020229130A1 (en) | 2020-11-19 |
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