EP3951821A1 - Antrieb für einen nieder-, mittel- und hochspannungs-vakuumschalter - Google Patents

Antrieb für einen nieder-, mittel- und hochspannungs-vakuumschalter Download PDF

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Publication number
EP3951821A1
EP3951821A1 EP20189654.5A EP20189654A EP3951821A1 EP 3951821 A1 EP3951821 A1 EP 3951821A1 EP 20189654 A EP20189654 A EP 20189654A EP 3951821 A1 EP3951821 A1 EP 3951821A1
Authority
EP
European Patent Office
Prior art keywords
cogwheel
pushrod
sun
axis
drive
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
EP20189654.5A
Other languages
English (en)
French (fr)
Other versions
EP3951821B1 (de
Inventor
Dietmar Gentsch
Christian Reuber
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 EP20189654.5A priority Critical patent/EP3951821B1/de
Priority to PCT/EP2021/069746 priority patent/WO2022028845A1/en
Priority to CN202180058134.7A priority patent/CN116057660A/zh
Publication of EP3951821A1 publication Critical patent/EP3951821A1/de
Application granted granted Critical
Publication of EP3951821B1 publication Critical patent/EP3951821B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • 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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • 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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
    • 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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3031—Means for locking the spring in a charged state
    • 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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Definitions

  • the present invention relates to a drive for a low, medium and high voltage vacuum interrupter, a low, medium and high voltage circuit breaker switching pole or switching device, and to a low, medium and high voltage switching system.
  • Low, medium and high voltage switching poles or circuit breakers use for example levers or shafts to connect several switching poles (usually 3) or other devices mechanically to one drive.
  • the poles themselves require a translational movement (like SF6 poles or vacuum poles).
  • levers and shafts it is difficult to connect several switching poles or devices unless they are arranged in one line.
  • a drive for a low, medium and high voltage switch comprising:
  • the pushrod comprises a threaded portion.
  • the sun cogwheel comprises an inner threaded portion located about an axis of the sun cogwheel.
  • the pushrod is connected to the sun cogwheel such that an axis of the pushrod is coaxial with the axis of the sun cogwheel.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • An axis of the cogwheel ring is coaxial with the axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth.
  • Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • a rotation of the at least one planetary cogwheel about the axis of the sun cogwheel in a first rotational direction is configured to rotate the sun cogwheel in the first rotational direction.
  • the rotation of the sun cogwheel in the first rotational direction is configured to move the pushrod along the axis of the pushrod in a first direction.
  • the drive in the first switching action is configured such that the cogwheel ring does not rotate.
  • the rotation of the sun cogwheel in the first rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • the drive comprises a carrier.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • a rotation of the carrier about the axis of the sun cogwheel in the first rotational direction is configured to rotate the at least one planetary cogwheel in the first rotational direction.
  • the carrier can be a ring type structure to which is mounted the planetary cogwheels. Then, the carrier can be stationary and the sun cogwheel and the cogwheel ring can rotate as the individual planetary cogwheels rotate about their own axes. Also, the carrier can rotate, and with the cogwheel ring stationary the individual planetary cogwheels rotate as the carrier rotates in this rotation is coupled to the sun cogwheel which then rotates. Also, the carrier can rotate, and with the sun cogwheel stationary the individual planetary cogwheels rotate as the carrier rotates in this rotation is coupled to the cogwheel ring which then rotates.
  • a first end of a first spring is coupled to the at least one planetary cogwheel.
  • energy release from the first spring is configured to rotate the at least one planetary cogwheel in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end of the first spring is held in a fixed position.
  • the first end of the first spring is coupled to the at least one planetary cogwheel via the carrier.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring.
  • the first switching action can store energy required for a return or second switching action bringing the switch back to its original (initial position) configuration.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the sun cogwheel in a second rotational direction opposite to the first rotational direction.
  • a first end of the second spring is connected to the pushrod or directly to a part of the planetary gear.
  • a second end of the second spring is held in a fixed position.
  • the drive in the second switching action is configured such that the at least one planetary cogwheel does not rotate about the axis of the sun cogwheel.
  • the sun cogwheel rotates, but the individual planetary cogwheels are not rotating about the centre axis but are each rotating about their own axes, and this leads to the cogwheel ring rotating.
  • the second switching movement is not constrained by storing energy in the first spring used to drive the first switching movement because the planetary cogwheels are not rotating as a whole around a centre axis but only rotating about their own axes.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • a low - medium and high voltage switch comprising a drive according to the first aspect.
  • a medium voltage switching system comprising:
  • the first, second and third drives are configured to be driven by a single motor such that simultaneous rotation of each sun cogwheel in the first rotational direction is configured to move the pushrod (or another rod or threaded part to generate forward backward operation) of each drive along the axis of the pushrod in the first direction.
  • a drive for a low - medium or high voltage switch comprising:
  • the pushrod comprises a threaded portion.
  • the sun cogwheel comprises an inner threaded portion located about an axis of the sun cogwheel.
  • the pushrod is connected to the sun cogwheel such that an axis of the pushrod is coaxial with the axis of the sun cogwheel.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • An axis of the cogwheel ring is coaxial with the axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth.
  • a rotation of the cogwheel ring about the axis of the sun cogwheel in a first rotational direction is configured to rotate the sun cogwheel in a second rotational direction opposite to the first rotational direction.
  • the rotation of the sun cogwheel in the second rotational direction is configured to move the pushrod along the axis of the pushrod in a first direction.
  • the drive in the first switching action is configured such that the at least one planetary cogwheel does not rotate about the pushrod axis.
  • the rotation of the sun cogwheel in the second rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • the drive comprises a carrier.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • the drive is configured such that in the first switching action the carrier is configured not to rotate about the axis of the sun cogwheel.
  • the carrier can be a ring type structure to which is mounted the planetary cogwheels. Then, the carrier can be stationary and the sun cogwheel and the cogwheel ring can rotate as the individual planetary cogwheels rotate about their own axes. Also, the carrier can rotate, and with the cogwheel ring stationary the individual planetary cogwheels rotate as the carrier rotates in this rotation is coupled to the sun cogwheel which then rotates. Also, the carrier can rotate, and with the sun cogwheel stationary the individual planetary cogwheels rotate as the carrier rotates in this rotation is coupled to the cogwheel ring which then rotates.
  • a first end of a first spring is coupled to the cogwheel ring.
  • energy release from the first spring is configured to rotate the cogwheel ring in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end of the first spring is held in a fixed position.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring.
  • the first switching action can store energy required for a return or second switching action bringing the switch back to its original configuration.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction (or in case of stepwise movement more positions are possible).
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the cogwheel ring in a second rotational direction opposite to the first rotational direction.
  • a first end of the second spring is connected to the pushrod.
  • a further possibility is to connect the second spring to one end of the planetary gear to provide the needed energy to drive the gear to operate.
  • a second end of the second spring is held in a fixed position.
  • the drive in the second switching action is configured such that the cogwheel ring does not rotate about the axis of the sun cogwheel.
  • the sun cogwheel rotates
  • the planetary cogwheels rotate about the centre axis and each planetary cogwheel is each rotating about its own axes, and this occurs with the cogwheel ring not rotating.
  • the second switching movement is not constrained by storing energy in the first spring used to drive the first switching movement because the cogwheel ring is not rotating.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • a low - medium and high voltage switch comprising a drive according to the fourth aspect.
  • a low, medium and high voltage switching system comprising:
  • the first, second and third drives are configured to be driven by a single motor such that simultaneous rotation of each sun cogwheel in the first rotational direction is configured to move the pushrod of each drive along the axis of the pushrod in the first direction.
  • a drive for a medium voltage switch comprising:
  • the pushrod comprises a threaded portion.
  • the cogwheel ring comprises an inner threaded portion located about an axis of the cogwheel ring.
  • the pushrod is connected to the cogwheel ring such that an axis of the pushrod is coaxial with the axis of the cogwheel ring.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • the axis of the cogwheel ring is coaxial with an axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth.
  • Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • a rotation of the at least one planetary cogwheel about the axis of the sun cogwheel in a first rotational direction is configured to rotate the cogwheel ring in a first rotational direction.
  • the rotation of the cogwheel ring in the first rotational direction is configured to move the pushrod along the axis of the pushrod in a first direction.
  • the drive in the first switching action the drive is configured such that the sun cogwheel does not rotate.
  • the rotation of the cogwheel ring in the first rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive is configured such that the pushrod does not rotate about the pushrod axis.
  • the drive comprises a carrier.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • a rotation of the carrier about the axis of the sun cogwheel in the first rotational direction is configured to rotate the at least one planetary cogwheel in the first rotational direction.
  • the carrier can be a ring type structure to which is mounted the planetary cogwheels. Then, the carrier can be stationary and the sun cogwheel and the cogwheel ring can rotate as the individual planetary cogwheels rotate about their own axes. Also, the carrier can rotate, and with the cogwheel ring stationary the individual planetary cogwheels rotate as the carrier rotates in this rotation is coupled to the sun cogwheel which then rotates. Also, the carrier can rotate, and with the sun cogwheel stationary the individual planetary cogwheels rotate as the carrier rotates in this rotation is coupled to the cogwheel ring which then rotates.
  • energy release from a first spring is configured to rotate the at least one planetary cogwheel in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end of the first spring is held in a fixed position.
  • the first end of the first spring is coupled to the at least one planetary cogwheel via the carrier.
  • movement of the pushrod (or another rod part) along the axis of the pushrod is configured to store energy in a second spring.
  • the first switching action can store energy required for a return or second switching action bringing the switch back to its original configuration (position).
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the cogwheel ring in a second rotational direction opposite to the first rotational direction.
  • a first end of the second spring is connected to the pushrod or will be connected to one end of the planetary gear.
  • a second end of the second spring is held in a fixed position.
  • the drive in the second switching action is configured such that the at least one planetary cogwheel does not rotate about the axis of the sun cogwheel.
  • the cogwheel ring rotates, but the individual planetary cogwheels are not rotating about the centre axis but are each rotating about their own axes, and this leads to the sun cogwheel rotating.
  • the second switching movement is not constrained by storing energy in the first spring used to drive the first switching movement because the planetary cogwheels are not rotating as a whole around a centre axis but only rotating about their own axes.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • a medium voltage switch comprising a drive according to the seventh aspect.
  • a medium voltage switching system comprising:
  • the first, second and third drives are configured to be driven by a single motor such that simultaneous rotation of each cogwheel ring in the first rotational direction is configured to move the pushrod of each drive along the axis of the pushrod in the first direction.
  • a drive for a medium voltage switch comprising:
  • the pushrod comprises a threaded portion.
  • the cogwheel ring comprises an inner threaded portion located about an axis of the cogwheel ring.
  • the pushrod is rotationally connected to the cogwheel ring such that an axis of the pushrod is coaxial with the axis of the cogwheel ring.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • the axis of the cogwheel ring is coaxial with an axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth.
  • Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • a rotation of the sun cogwheel in a first rotational direction is configured to rotate the cogwheel ring in a second rotational direction counter to the first rotational direction.
  • the rotation of the cogwheel ring in the second rotational direction is configured to move the pushrod along the axis of the pushrod in a first direction.
  • the at least one planetary cogwheel comprises three planetary cogwheels.
  • the drive in the first switching action is configured such that the at least one planetary cogwheel does not rotate about the axis of the sun cogwheel.
  • the rotation of the cogwheel ring in the second rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • the drive comprises a carrier.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • the drive is configured such that in the first switching action the carrier is configured not to rotate about the axis of the sun cogwheel.
  • a first end of a first spring is coupled to the sun cogwheel.
  • energy release from the first spring is configured to rotate the sun cogwheel in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end of the first spring is held in a fixed position.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the cogwheel ring in the first rotational direction opposite to the second rotational direction.
  • a first end of the second spring is connected to the pushrod.
  • a second end of the second spring is held in a fixed position.
  • the drive in the second switching action is configured such that the sun cogwheel does not rotate about the axis of the sun cogwheel.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • Figs. 1-3 relate to examples of a drive for a low - medium and high voltage switch. There are three embodiments, however only the first embodiment is shown.
  • the drive for a low - medium and high voltage switch comprises a pushrod 10, a sun cogwheel 30, at least one planetary cogwheel 40, and a cogwheel ring 60.
  • the pushrod comprises a threaded portion 20.
  • the sun cogwheel comprises an inner threaded portion located about an axis of the sun cogwheel.
  • the pushrod is rotationally connected to the sun cogwheel such that an axis of the pushrod is coaxial with the axis of the sun cogwheel.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • An axis of the cogwheel ring is coaxial with the axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth. Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • the pushrod of the drive can be the pushrod of for example a movable connector that is moved up against a stationary connector of a vacuum interrupter or circuit breaker.
  • the at least one planetary cogwheel comprises three planetary cogwheels.
  • the low - medium and high voltage switch is a circuit breaker with a vacuum interrupter.
  • the drive in the first switching action is configured such that the cogwheel ring does not rotate. This can be achieved by it being locked in position for example.
  • the rotation of the sun cogwheel in the first rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • This can be achieved for example through a protrusion on the pushrod sliding within a groove of the drive, or a protrusion in the drive sliding within a groove of the pushrod, thereby inhibiting the pushrod from rotating but enabling it to move longitudinally along its axis.
  • the drive comprises a carrier 50.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • a rotation of the carrier about the axis of the sun cogwheel in the first rotational direction is configured to rotate the at least one planetary cogwheel in the first rotational direction.
  • a first end 74 of a first spring 70 is coupled to the at least one planetary cogwheel.
  • energy release from the first spring 70 is configured to rotate the at least one planetary cogwheel in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end 72 of the first spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • the first end of the first spring is coupled to the at least one planetary cogwheel via the carrier 50.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring 80.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the sun cogwheel in a second rotational direction opposite to the first rotational direction.
  • a first end 84 of the second spring is connected to the pushrod.
  • a second end 82 of the second spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • the drive is configured such that the at least one planetary cogwheel does not rotate about the axis of the sun cogwheel.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • the second end of the first spring is released from its fixed state, moved rotationally about the centre axis of the drive to store energy in the first spring and then fixed in position again.
  • the drive of any of the examples of embodiment 1 can also be part of a low - medium and high voltage switch, e.g. a CB with a vacuum interrupter on another moving device.
  • a low - medium and high voltage switch e.g. a CB with a vacuum interrupter on another moving device.
  • the drives as described in any of the examples of embodiment 1 can also be part of a low - medium and high voltage switching system, for example a three phase system.
  • a low - medium and high voltage switching system for example a three phase system.
  • Such as system then comprises a first drive for a low - medium and high voltage switch according to any of the examples of embodiment 1, a second drive for a low - medium and high voltage switch according to any of the examples of embodiment 1, and a third drive for a low - medium and high voltage switch according to any of the examples of embodiment 1.
  • the first, second and third drives can then be configured to be driven by a single motor such that simultaneous rotation of each sun cogwheel in the first rotational direction is configured to move the pushrod of each drive along the axis of the pushrod in the first direction.
  • the drive for a low - medium and high voltage switch comprises a pushrod 10, a sun cogwheel 30, at least one planetary cogwheel 40, and a cogwheel ring 60.
  • the pushrod comprises a threaded portion 20.
  • the sun cogwheel comprises an inner threaded portion located about an axis of the sun cogwheel.
  • the pushrod is rotationally connected to the sun cogwheel such that an axis of the pushrod is coaxial with the axis of the sun cogwheel.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • An axis of the cogwheel ring is coaxial with the axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth. Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • the pushrod of the drive can be the pushrod of for example a movable connector that is moved up against a stationary connector of a vacuum interrupter or circuit breaker.
  • the at least one planetary cogwheel comprises three planetary cogwheels.
  • the low - medium and high voltage switch is a CB with a vacuum interrupter or another switching device.
  • the drive in the first switching action is configured such that the at least one planetary cogwheel does not rotate about the pushrod axis. This can be achieved by it being locked in position for example.
  • the rotation of the sun cogwheel in the second rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • This can be achieved for example through a protrusion on the pushrod sliding within a groove of the drive, or a protrusion in the drive sliding within a groove of the pushrod, thereby inhibiting the pushrod from rotating but enabling it to move longitudinally along its axis.
  • the drive comprises a carrier 50.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • the drive is configured such that in the first switching action the carrier is configured not to rotate about the axis of the sun cogwheel. This can be achieved by it being locked in position for example.
  • a first end 74 of a first spring 70 is coupled to the cogwheel ring.
  • energy release from the first spring 70 is configured to rotate the cogwheel ring in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end 72 of the first spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring 80.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod (or another switching element a rod or a wheel) along the axis of the pushrod in the second direction is configured to rotate the cogwheel ring in a second rotational direction opposite to the first rotational direction.
  • a first end 84 of the second spring is connected to the pushrod.
  • a second end 82 of the second spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • the drive in the second switching action is configured such that the cogwheel ring does not rotate about the axis of the sun cogwheel.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • the second end of the first spring is released from its fixed state, moved rotationally about the centre axis of the drive to store energy in the first spring and then fixed in position again.
  • the drive of any of the examples of embodiment 1 can also be part of a low - medium and high voltage switch, e.g. a CB with a vacuum interrupter or another switching device.
  • a low - medium and high voltage switch e.g. a CB with a vacuum interrupter or another switching device.
  • the drives as described in any of the examples of embodiment 2 can also be part of a low - medium and high voltage switching system, for example a three phase system. Such as system then comprises a first drive for a low - medium and high voltage switch according to any of the examples of embodiment 2, a second drive for a low - medium and high voltage switch according to any of the examples of embodiment 2, and a third drive for a low - medium and high voltage switch according to any of the examples of embodiment 2.
  • the first, second and third drives can then be configured to be driven by a single motor such that simultaneous rotation of each sun cogwheel in the first rotational direction is configured to move the pushrod of each drive along the axis of the pushrod in the first direction.
  • the drive for a medium voltage switch comprises a pushrod 10, a sun cogwheel 30, at least one planetary cogwheel 40, and a cogwheel ring 60.
  • the pushrod comprises a threaded portion 20.
  • the cogwheel ring comprises an inner threaded portion located about an axis of the cogwheel ring.
  • the pushrod is rotationally connected to the cogwheel ring such that an axis of the pushrod is coaxial with the axis of the cogwheel ring.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • the axis of the cogwheel ring is coaxial with an axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth. Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • the pushrod of the drive can be the pushrod of for example a movable connector that is moved up against a stationary connector of a vacuum interrupter or circuit breaker.
  • the at least one planetary cogwheel comprises three planetary cogwheels.
  • the low - medium and high voltage switch is a CB with a vacuum interrupter or the other switching element.
  • the drive in the first switching action is configured such that the sun cogwheel does not rotate. This can be achieved by it being locked in position for example.
  • the rotation of the cogwheel ring in the first rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • This can be achieved for example through a protrusion on the pushrod sliding within a groove of the drive, or a protrusion in the drive sliding within a groove of the pushrod, thereby inhibiting the pushrod from rotating but enabling it to move longitudinally along its axis.
  • the drive comprises a carrier 50.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • the drive is configured such that in the first switching action a rotation of the carrier about the axis of the sun cogwheel in the first rotational direction is configured to rotate the at least one planetary cogwheel in the first rotational direction.
  • This operation can be even achieved by using the planetary gear from the other direction where the sun cogwheel is connected to the first spring 70 and the cogwheel ring is connected to the movable device to switch on and of even if the movement will be done stepwise forward or backward. This is discussed with respect to embodiment 4.
  • a first end 74 of a first spring 70 is coupled to the at least one planetary cogwheel.
  • energy release from the first spring 70 is configured to rotate the at least one planetary cogwheel in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end 72 of the first spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • the first end of the first spring is coupled to the at least one planetary cogwheel via the carrier.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring 80.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the cogwheel ring in a second rotational direction opposite to the first rotational direction.
  • a first end 84 of the second spring is connected to the pushrod.
  • a second end 82 of the second spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • the drive is configured such that the at least one planetary cogwheel does not rotate about the axis of the sun cogwheel.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • the second end of the first spring is released from its fixed state, moved rotationally about the centre axis of the drive to store energy in the first spring and then fixed in position again.
  • the drive of any of the examples of embodiment 3 can also be part of a low - medium and high voltage switch.
  • the drives as described in any of the examples of embodiment 3 can also be part of a low - medium and high voltage switching system, for example a three phase system. Such as system then comprises a first drive for a low - medium and high voltage switch according to any of the examples of embodiment 3, a second drive for a low - medium and high voltage switch according to any of the examples of embodiment 3, and a third drive for a medium voltage switch according to any of the examples of embodiment 3.
  • the first, second and third drives can be configured to be driven by a single motor such that simultaneous rotation of each cogwheel ring in the first rotational direction is configured to move the pushrod of each drive along the axis of the pushrod in the first direction.
  • the drive for a medium voltage switch comprises a pushrod 10, a sun cogwheel 30, at least one planetary cogwheel 40, and a cogwheel ring 60.
  • the pushrod comprises a threaded portion 20.
  • the cogwheel ring comprises an inner threaded portion located about an axis of the cogwheel ring.
  • the pushrod is rotationally connected to the cogwheel ring such that an axis of the pushrod is coaxial with the axis of the cogwheel ring.
  • the sun cogwheel comprises a plurality of outward facing teeth.
  • the axis of the cogwheel ring is coaxial with an axis of the sun cogwheel.
  • the cogwheel ring comprises a plurality of inward facing teeth.
  • the at least one planetary cogwheel is located between the sun cogwheel and the cogwheel ring.
  • the at least one planetary cogwheel comprises a plurality of outward facing teeth. Some teeth of the at least one planetary cogwheel are engaged with some teeth of the sun cogwheel and some other teeth of the at least one planetary cogwheel are engaged with some teeth of the cogwheel ring.
  • the pushrod of the drive can be the pushrod of for example a movable connector that is moved up against a stationary connector of a vacuum interrupter or circuit breaker.
  • the at least one planetary cogwheel comprises three planetary cogwheels.
  • the low, medium and high voltage switch is a CB with a vacuum interrupter or another switching element.
  • the drive in the first switching action is configured such that the at least one planetary cogwheel does not rotate about the axis of the sun cogwheel. This can be achieved by it being locked in position for example.
  • the individual planetary cogwheels can rotate about their own axes, but they do not rotate as a group around the central axis.
  • the rotation of the cogwheel ring in the second rotational direction is configured to move the pushrod along the axis of the pushrod in the first direction away from the sun cogwheel.
  • the drive in the first switching action is configured such that the pushrod does not rotate about the pushrod axis.
  • This can be achieved for example through a protrusion on the pushrod sliding within a groove of the drive, or a protrusion in the drive sliding within a groove of the pushrod, thereby inhibiting the pushrod from rotating but enabling it to move longitudinally along its axis.
  • the drive comprises a carrier 50.
  • An axis of the carrier is coaxial with the axis of the sun cogwheel.
  • Each planetary cogwheel of the at least one planetary cogwheel is rotational connected to the carrier.
  • the drive is configured such that in the first switching action the carrier is configured not to rotate about the axis of the sun cogwheel. This can be achieved by it being locked in position for example.
  • a first end 74 of a first spring 70 is coupled to the sun cogwheel.
  • energy release from the first spring 70 is configured to rotate the sun cogwheel in the first rotational direction about the axis of the sun cogwheel.
  • the drive in the first switching action is configured such that a second end 72 of the first spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • movement of the pushrod along the axis of the pushrod is configured to store energy in a second spring 80.
  • energy release from the second spring is configured to move the pushrod along the axis of the pushrod in a second direction opposite to the first direction.
  • the movement of the pushrod along the axis of the pushrod in the second direction is configured to rotate the cogwheel ring in the first rotational direction opposite to the second rotational direction.
  • a first end 84 of the second spring is connected to the pushrod.
  • a second end 82 of the second spring is held in a fixed position. This can be achieved by it being locked in position for example.
  • the drive in the second switching action is configured such that the sun cogwheel does not rotate about the axis of the sun cogwheel.
  • the drive in the second switching action is configured such that the second end of the first spring is held in the fixed position.
  • the drive prior to the first switching action the drive is configured such that a rotation of the second end of the first spring in the first rotational direction is configured to store energy in the first spring.
  • the second end of the first spring is released from its fixed state, moved rotationally about the centre axis of the drive to store energy in the first spring and then fixed in position again.
  • the drive of any of the examples of embodiment 4 can also be part of a low, medium and high voltage switch.
  • the drives as described in any of the examples of embodiment 4 can also be part of a low, medium and high voltage switching system, for example a three phase system. Such as system then comprises a first drive for a low, medium and high voltage switch according to any of the examples of embodiment 4, a second drive for a low, medium and high voltage switch according to any of the examples of embodiment 4, and a third drive for a medium voltage switch according to any of the examples of embodiment 4.
  • the first, second and third drives can be configured to be driven by a single motor such that simultaneous rotation of each cogwheel ring in the first rotational direction is configured to move the pushrod of each drive along the axis of the pushrod in the first direction.
  • Figure 1 shows three instants of the closing operation, from left to right: OFF position, intermediate position, ON position.
  • the energy for the operation is stored in the closing spring 70.
  • both the planetary cogwheel carrier 50 and the hollow cogwheel ring 60 are locked against rotation by their relevant locking features shown as 52, 62 and locking devices shown as 90,100.
  • the closing spring 70 is charged to drive the closing operation while the opening spring 80 is discharged.
  • the locking device 90 For closing, the locking device 90 is unlocked, so that the closing spring 70 can drive the carrier 50 counter-clockwise.
  • the outer end 72 of the closing spring 70 is currently locked in the shown position.
  • the sun cogwheel 30 is connected or coupled to the pushrod 10 by for example a high helix thread 20 (or another thread type) so that a counter-clockwise rotation of the sun cogwheel 30 shifts the pushrod 10 away from the OFF-position towards the ON-position.
  • This motion of the pushrod 10 charges the opening spring 80, as its upper end 82 is permanently locked in the shown position while the lower end of 80 is connected to the pushrod 10.
  • the sun cogwheel 30 can have a male thread and the pushrod 10 have a female thread, or the sun cogwheel 30 can have a female thread and the pushrod 10 have a male thread.
  • the closing spring 70 has rotated the carrier 50 by 45° counter-clockwise. According to the chosen number of teeth, this corresponds to a counter-clockwise rotation of 180° of the sun cogwheel 30. Due to the high helix thread 20, the pushrod was moved half of its way upwards from OFF to ON. The opening spring was charged by the movement of the pushrod. In the ON-position shown at the right side of figure 1 , the closing spring 70 has rotated the planetary carrier 50 by 90° counter-clockwise. According to the chosen number of teeth, this corresponds to a rotation of 360° counter-clockwise of the sun cogwheel 30.
  • the pushrod was moved its complete way upwards from OFF to ON.
  • the opening spring was fully charged.
  • the next locking feature 52 is in a position where the locking device 90 can push a pin, e.g. driven by a spring, into the locking feature 52 and so stop and latch the closing operation.
  • the closing operation can also be stopped and latched by separate devices.
  • locking features 52 are not only provided at the OFF and the ON positions of the cogwheel planetary carrier 50, but also in the intermediate position.
  • the pushrod 10 is again threaded but is not connected or coupled to the sun cogwheel 30.
  • the hollow cogwheel ring 60 has a top cover that can be for example a disk, and a centre of this disk is threaded.
  • the sun cogwheel 30 and planetary cogwheels 40 in this example are underneath the top cover of the cogwheel ring 60.
  • the closing spring 70 can again drive the carrier 50 and the planetary cogwheels 40 around the axis of the sun cogwheel 30.
  • the sun cogwheel 30 can then be locked in position and not rotate and the hollow cogwheel ring 60 then rotates in a clockwise direction.
  • the pushrod 10 can then be threaded in the opposite direction to that described above, and again the pushrod moves away from the off position towards the on position.
  • the closing spring 70 can be in effect rotated 180° and the energy release can rotate the carrier in the opposite direction to that described above and again rotation of the cogwheel ring 60 now again in the counter clockwise direction leads to movement of the pushrod from the opposition to the on position.
  • the cogwheel ring 60 can have a male thread and the pushrod 10 have a female thread, or the cogwheel ring 60 can have a female thread and the pushrod 10 have a male thread.
  • the pushrod 10 is again threaded and connected or coupled to the sun cogwheel 30.
  • the closing spring 70 is coupled to the cogwheel ring 60 and now drives rotation of the cogwheel ring 60 rather than driving rotation of the carrier 50 of the planetary cogwheels 40.
  • the carrier 50 of the planetary cogwheels 40 is then held in a fixed position, and does not rotate, but the individual planetary cogwheels 40 then rotate about their axes with rotation of the cogwheel ring 60 then rotating the sun cogwheel 30, which then drives the pushrod 10.
  • Figure 2 shows three instants of the opening operation, from left to right: ON position, intermediate position, OFF position.
  • the energy for the operation is stored in the opening spring 80.
  • ON position both the planetary cogwheel carrier 50 and the hollow cogwheel ring 60 are locked against rotation by their relevant locking features shown as 52, 62 and locking devices shown as 90,100.
  • the closing spring 70 is discharged, and the opening spring 80 is charged to drive the opening operation.
  • the locking device 100 is unlocked, so that the hollow cogwheel ring 60 is freely rotatable.
  • the opening spring 80 can drive the pushrod 10 downwards, away from the ON position towards the OFF-position.
  • the pushrod is connected by a high helix thread 20 (or another thread type) to the sun cogwheel 30, so that a downward movement of 10 results in a clockwise rotation of 30.
  • the planetary cogwheel carrier 50 is not rotating, as it is locked by locking device 90, 52, but the planetary cogwheels 40 are rotating then counter-clockwise. Also the hollow cogwheel ring 60 is rotating counter-clockwise.
  • the closing spring 70 is idle in this phase.
  • the opening spring 80 has moved the pushrod 10 half of its way downwards from ON to OFF. Due to the high helix thread 20 (or another thread type), the sun cogwheel 30 was rotated by 180° clockwise. According to the chosen number of teeth, this corresponds to a counter-clockwise rotation of 60° of the hollow cogwheel ring 60.
  • the opening spring 80 has moved the pushrod 10 its complete way downwards from ON to OFF. Due to the high helix thread 20 (or another thread type), the sun cogwheel 30 was rotated by 360° clockwise. According to the chosen number of teeth, this corresponds to a counter-clockwise rotation of 120° of the hollow cogwheel ring 60. Now the next locking feature 62 is in a position where the locking device 100 can push a pin, e.g. driven by a spring, into the locking feature 62 and so stop and latch the opening operation. Alternatively, the opening operation can also be stopped and latched by separate devices.
  • the closing spring drives the planetary cogwheel carrier 50 and the pushrod 10 is driven by the sun cogwheel 30.
  • the planetary cogwheel 50 can be driven with the closing spring to drive pushrod 10 with the hollow cogwheel ring 60, and alternatively the hollow cogwheel ring 60 can be driven with the closing spring to drive the pushrod 10 with the sun cogwheel 30.
  • additional locking features 62 are provided in the hollow cogwheel ring 60.
  • the corresponding locking device 90 or 100
  • the drive will be stopped when the pin of the locking device finds the next locking feature 52 (or 62).
  • the intermediate position can for example be in the middle of the total stroke, or it can be closer to the OFF position or closer to the ON position.
  • the drive 1 could then e.g. operate from the OFF position to an intermediate position, and then further to ON or back to OFF.
  • the switch drive could then also operate from the ON position to said intermediate position and further to OFF or back to ON.
  • the drive can have more than one intermediate position.
  • the drive can be utilized in a circuit breaker or two position switch, and having an intermediate position can also be used as the drive for a three-position switch.
  • the drive for a drive for a low, medium and high voltage vacuum interrupter uses a planter gear system, where there are three main elements of the planetary gear. These are the sun cogwheel 30, the at least one planetary cogwheel 40 (and planetary carrier 50) and the cogwheel ring 60.
  • Figure 3 shows the recharging of the closing spring 70 from left to right: discharged, intermediate, charged.
  • the outer end 72 is rotated counter-clockwise.
  • the main axis of the drive can be in line with the main axis of the switching pole, so that compact designs of complete switching poles including the mechanical drives are possible and derived from it the switchgear will be smaller.
  • the drive does not require means for driving forth and back - the rotation of springs and main drive parts is always the same. This reduces the complexity of the drive, and so also overall costs and size.
  • a planetary gear system is used for driving a switching device such as an interruption device e.g. a vacuum interrupter with springs, for obtaining a small and less complex in-axis design of drive and pole.
  • a switching device such as an interruption device e.g. a vacuum interrupter with springs

Landscapes

  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Structure Of Transmissions (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP20189654.5A 2020-08-05 2020-08-05 Antrieb für einen nieder-, mittel- und hochspannungs-vakuumschalter Active EP3951821B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20189654.5A EP3951821B1 (de) 2020-08-05 2020-08-05 Antrieb für einen nieder-, mittel- und hochspannungs-vakuumschalter
PCT/EP2021/069746 WO2022028845A1 (en) 2020-08-05 2021-07-15 Drive for a low, medium and high voltage vacuum interrupter
CN202180058134.7A CN116057660A (zh) 2020-08-05 2021-07-15 用于低压、中压和高压真空断续器的驱动器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20189654.5A EP3951821B1 (de) 2020-08-05 2020-08-05 Antrieb für einen nieder-, mittel- und hochspannungs-vakuumschalter

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EP3951821A1 true EP3951821A1 (de) 2022-02-09
EP3951821B1 EP3951821B1 (de) 2024-05-29

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EP (1) EP3951821B1 (de)
CN (1) CN116057660A (de)
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT339417B (de) * 1974-04-25 1977-10-25 Naimer H L Vorrichtung zur entkupplung einer schalterantriebswelle
US20030089683A1 (en) * 2000-02-03 2003-05-15 Per-Olof Thuresson Circuit breaker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ290316B6 (cs) * 1995-11-20 2002-07-17 Ivep A. S. Pohonová jednotka, zejména elektrických spínacích přístrojů

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT339417B (de) * 1974-04-25 1977-10-25 Naimer H L Vorrichtung zur entkupplung einer schalterantriebswelle
US20030089683A1 (en) * 2000-02-03 2003-05-15 Per-Olof Thuresson Circuit breaker

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EP3951821B1 (de) 2024-05-29
WO2022028845A1 (en) 2022-02-10

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