EP3132534A2 - Schaltvorrichtung für eine stern-dreieck-umschaltung bei einem mehrphasigen motor - Google Patents
Schaltvorrichtung für eine stern-dreieck-umschaltung bei einem mehrphasigen motorInfo
- Publication number
- EP3132534A2 EP3132534A2 EP15706825.5A EP15706825A EP3132534A2 EP 3132534 A2 EP3132534 A2 EP 3132534A2 EP 15706825 A EP15706825 A EP 15706825A EP 3132534 A2 EP3132534 A2 EP 3132534A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- motor winding
- movable
- star
- bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004804 winding Methods 0.000 claims abstract description 46
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000006870 function Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/002—Details of electromagnetic relays particular to three-phase electromagnetic relays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2209—Polarised relays with rectilinearly movable armature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/32—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by star/delta switching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2209—Polarised relays with rectilinearly movable armature
- H01H2051/2218—Polarised relays with rectilinearly movable armature having at least one movable permanent magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/546—Contact arrangements for contactors having bridging contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/005—Inversing contactors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
- H01H53/01—Details
- H01H53/015—Moving coils; Contact-driving arrangements associated therewith
Definitions
- the invention relates to a switching device for a star-delta switching in a multi-phase motor.
- a star-delta switchover is used, for example, for starting up 3-phase (electric) motors.
- the three motor windings are connected during a start-up phase of the motor to a star connection in which the three phases L1 to L3 for the power supply of the motor connected to the terminals U1, V1 and W1 of the motor windings and the terminals U2, V2 and W2 are interconnected. This interconnection reduces the overall power of the engine when starting up to one third of the operating power.
- the motor windings are connected in a triangle by the terminals U1, W2 and V1, U2 and W1, V2 are connected together and connected to the phase L1 and L2 or L3.
- three contactors Q1 1 line contactor
- Q12 delta contactor
- Q13 star contactor
- the contactors Q12 and Q13 realize the star-delta switchover.
- the contactor Q13 is closed, and the contactor Q12 is opened.
- the delta connection it is vice versa.
- these contactors are locked against each other, which is ensured by auxiliary contacts.
- a switching device for a star-delta contactor in which three contact levels are provided so that network, - can be integrated with a time relay and star contactor in an assembly.
- the star-delta switchover takes place via a bimetal, which unlocks a mechanical lock and the contactor of the star and the Triangular operation forces when the network level contacts are closed.
- a bimetal is not very accurate, so the switching timing from the star to the delta connection can not be determined accurately.
- many springs are used to build up the force to hold the contacts in position or bring in this known construction. Since the elasticity of the springs can decrease over time, this suffers the reliability of the switching device.
- the international patent application WO00 / 57444A1 also describes an integrated star-delta switching device comprising two contactor drives in the form of coils, by means of which a lever can move movable, spring-held contacts between two positions in order to switch from star to delta.
- this lever design is structurally complex and also requires many springs with the aforementioned disadvantages.
- two contactor drives are required.
- Object of the present invention is therefore to provide an improved switching device for a star-delta switching in a multi-phase motor.
- An underlying idea of the present invention is to provide a contact device per motor winding of a polyphase motor, which is designed such that it integrates the switching functions of the mains, delta and star contactors and has a contact bridge coupled to a drive axis of an electro-magnetic drive , which can be moved via the drive axle between three defined axial positions.
- a contact device per motor winding of a polyphase motor which is designed such that it integrates the switching functions of the mains, delta and star contactors and has a contact bridge coupled to a drive axis of an electro-magnetic drive , which can be moved via the drive axle between three defined axial positions.
- no springs for force build-up or for holding the contact bridge is required because their position or axial position can be controlled precisely with the electro-magnetic drive.
- An embodiment of the invention relates to a switching device for a star-delta switching in a polyphase motor with a motor winding per phase, each motor winding each having a motor winding terminal pair U1, U2, V1, V2, W1, W2, and wherein the switching device following comprising: an electro-magnetic drive for moving a drive axis between three defined axial positions and per motor winding a contact device having a first and a second motor winding terminal contact, a phase terminal contact and a movable contact bridge, which is coupled to the drive axle and via this in the three defined positions can be moved.
- the movable contact bridge is located in a first and axially located between the other two positions position in an open-Steil, in which none of the terminals is electrically connected to another of the terminal contacts via the contact bridge.
- the movable contact bridge In a second of the three defined positions, the movable contact bridge is in a star contact position, in which the contact bridge electrically connects the phase connection contact with the first motor winding connection contact and the second motor winding connection contact via a star contact coupled to the drive axis the second motor winding terminal contacts of all other contact devices is electrically connected.
- the movable contact bridge is in a triangular contact position in which the contact bridge electrically connects the phase terminal contact to the first and second motor winding terminal contacts.
- the contact device may comprise: a conductive contact arm emanating from the first motor winding terminal contact and extending to the level of the star contact position, which is contacted by the contact bridge in the star contact position; a conductive contact arm extending from the first motor winding terminal contact and extending to the level of the triangle contact position contacted by the contact bridge in the triangular contact position; a conductive contact arm extending from the phase termination contact and extending to the level of the star contact position contacted by the contact bridge in the star contact position; a conductive contact arm extending from the phase termination contact and extending to the level of the triangular contact position, the contact arm in the Triangle contact position is contacted; and a conductive contact arm extending from the second motor winding terminal contact and extending to the level of the triangle contact position contacted by the contact bridge in the triangular contact position and the star contact in the star contact position.
- the two conductive contact arms respectively starting from the first motor winding connection contact and from the phase connection contact may form a U or V, other contact points are provided at each other, to which corresponding contact points of the contact bridge for contacting in the corresponding position of the contact bridge are pressed.
- the electro-magnetic drive may comprise a movable permanent magnet coupled to the drive axle and a fixed electromagnet.
- the movable permanent magnet can be held by springs in the de-energized state of the fixed electromagnet in a first position, so that the drive axle is in the first defined position, and the movable permanent magnet can in the energized state of the fixed electromagnet depending on the current direction in a second or a third position against the force of the springs are pressed against a stop or on poles of the fixed electromagnet, so that the drive axle is in the second or third defined position.
- the electro-magnetic drive may also have a movable electromagnet coupled to the drive axle and a fixed electromagnet.
- the movable electromagnet can be held by springs in the de-energized state of the movable or fixed electromagnet in a first position, so that the drive axle is in the first defined position, and the movable electromagnet can in the energized state of both electromagnets depending on the current direction in a second or third position against the force of the springs are pressed against a stop or to poles of the fixed electromagnet, so that the drive axle is in the second or third defined position.
- the springs can be provided here as electrical leads for energizing the movable electromagnet.
- the contactor may also include semiconductor switches connected between the movable contact bridge and the first and second motor winding terminal contacts and the phase terminal contact.
- FIG. 1 shows a conventional star-delta switching in a three-phase motor with three contactors.
- Fig. 2 is a sectional view of an embodiment of a contact device of a switching device according to the invention
- Fig. 3 shows a first embodiment of an electro-magnetic drive with a movable permanent magnet of a switching device according to the invention
- Fig. 4 shows a second embodiment of an electro-magnetic drive with a movable electromagnet of a switching device according to the invention.
- the switching device for a star-delta switching in a 3-phase motor with a motor winding per phase integrates the three contactors Q1 1, Q12 and Q13 of the conventional star-delta switching shown in Fig. 1 by a special contact device 20th , from the in Fig. 2 a Section view is shown.
- a separate contact device 20 is provided per motor winding, so that three of the contact device 20 shown in FIG. 2 are required in the 3-phase motor.
- the contact device 20 is characterized in particular by the fact that the axially movable (see the double arrow in Fig. 2) movable contact bridge 28 in three defined and different positions can be moved: an open position or - position 14 (middle position of the contact bridge as 2), a star contact position 16 and a triangle contact position 18.
- the three positions 14, 16, 18 correspond to three different planes.
- the contact bridge 28 is axially moved between the three axial positions 14, 16 and 18 via a drive shaft 12 connected to it made of a non-electrically conductive material, in particular an insulator. The movement takes place via an electromagnetic drive. As shown in FIG. 2, the contact device 20 does not require springs for holding the contact bridge 28 in its three positions 14, 16, 18.
- the contact device 20 shown in FIG. 2 has a first motor winding connection contact 22, a second motor winding connection contact 24 and a phase connection contact 26.
- the connection contact 22 In the first of the three contact devices, the connection contact 22 is connected to U1, the connection contact 24 to V2 and the connection contact 26 to L1.
- the connection contact 22 In the second of the three contact devices, the connection contact 22 is connected to V1, the connection contact 24 to W2 and the connection contact 26 to L2.
- the connection contact 22 is connected to W1, the connection contact 24 to U2 and the connection contact 26 to L3. From the terminal contact 22 extend two electrically conductive contact arms 44 and 46 to the plane of the star contact position 16 and the triangular contact position 18. As shown in Fig. 2 form the contact arms 44 and 46 in section about a U.
- this contact arm 52 is provided at its end with a double contact, whereby the terminal contact 24 in the star contact Position 16 is contacted by a fixed to the drive shaft 12 star contact 30 and in the triangular contact position 18 of the contact bridge 28. If the contact bridge 28 is thus moved from the open position 14, in which none of the connection contacts 22, 24 and 26 is connected to another contact, into the star contact position 16, the connection contacts 22 and 26 are electrically connected to one another (ie U1 and L1, V1 and L2, W1 and L3), and the terminal contact 24 with the star contact 30, which is electrically connected to the star contacts of the other contact devices (ie V2 with W2 and U2).
- the star contact position 16 corresponds to the closing of the contactors Q1 1 and Q13 in the circuit shown in FIG.
- the contact bridge 28 closes all three connection contacts 22, 24 and 26 electrically short (ie U1 with L1 and V2, V1 with L2 and W2, W1 with L3 and U2).
- the triangle contact position 18 corresponds to the closing of the contactors Q1 1 and Q12 in the circuit shown in FIG.
- Fig. 3 shows an electromagnetic drive 10 for the drive shaft 12 with a movably mounted and fixed to the drive shaft 12 permanent magnet 32 which is held by springs 36 in a first position between stops 38 and poles 40 of a fixed electromagnet 34, provided the electromagnet 34th is de-energized and exerts no magnetic force on the permanent magnet 32.
- the first position of the permanent magnet 32 is the coupled with the drive shaft 12 contact bridge 28 in the open position 14.
- the permanent magnet 32 can be attracted or repelled by the electromagnet 34 .
- the electromagnet 34 is energized in such a way that the permanent magnet 32 is repelled and pressed against the stops 38.
- the electromagnet 34 is energized so that the permanent magnet 32 is attracted and pressed onto the poles 40.
- a permanent magnet 32 and a movable electromagnet 42 may be used, such as the electro-magnetic drive 1 shown in FIG.
- the energization of the movable electromagnet 42 can take place via the springs 36 (voltage U2 in FIG. 4) in order to avoid additional electrical lines.
- semiconductor switches can be connected between the movable contact bridge and the terminal contacts 22, 24 and 26 which are turned on to prevent arcing when the contacts 22, 24 and 26 are opened become.
- the switching device could, for example, be controlled as follows: a timer could be used to specify a time after which the operating mode should be changed, for example, from a star to a delta circuit.
- the switching can also make a control that controls the electro-magnetic drive accordingly. Since no auxiliary switches as in the conventional star-delta switching shown in Fig. 1 must be queried, the programming effort for a control of the switching can be significantly reduced with the invention.
- a predetermined electrical voltage could be checked, for example with ramp function, to distinguish between the switching states.
- the Heidelbergvornchtung invention is particularly suitable for use in motor starters.
- the switching device according to the invention only requires the connection of the motor and the phases of the three-phase power supply.
- the electromagnetic drive of the switching device according to the invention can optionally be controlled by a memory programmable controller (SPS) or by simply applying an electrical voltage.
- SPS memory programmable controller
- the switching device according to the invention allows a compact design due to its high functional density.
- the switching device according to the invention allows a reduction of the material costs in production, since only an electromagnetic drive, only an electronics for driving, no pre-wiring of multiple contactors in production and only one housing are required.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
- Linear Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014105579.9A DE102014105579A1 (de) | 2014-04-17 | 2014-04-17 | Schaltvorrichtung für eine Stern-Dreieck-Umschaltung bei einem mehrphasigen Motor |
PCT/EP2015/054154 WO2015158457A2 (de) | 2014-04-17 | 2015-02-27 | Schaltvorrichtung für eine stern-dreieck-umschaltung bei einem mehrphasigen motor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3132534A2 true EP3132534A2 (de) | 2017-02-22 |
Family
ID=52595344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15706825.5A Withdrawn EP3132534A2 (de) | 2014-04-17 | 2015-02-27 | Schaltvorrichtung für eine stern-dreieck-umschaltung bei einem mehrphasigen motor |
Country Status (6)
Country | Link |
---|---|
US (1) | US10283297B2 (de) |
EP (1) | EP3132534A2 (de) |
CN (1) | CN106233611B (de) |
CA (1) | CA2945545A1 (de) |
DE (1) | DE102014105579A1 (de) |
WO (1) | WO2015158457A2 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014105579A1 (de) * | 2014-04-17 | 2015-10-22 | Eaton Electrical Ip Gmbh & Co. Kg | Schaltvorrichtung für eine Stern-Dreieck-Umschaltung bei einem mehrphasigen Motor |
CN106849442A (zh) * | 2017-04-26 | 2017-06-13 | 合肥巨动力系统有限公司 | 一种可变匝数扁线电机定子绕组 |
DE102017109210B4 (de) * | 2017-04-28 | 2023-10-12 | Tdk Electronics Ag | Relais |
CN111262499A (zh) * | 2018-11-30 | 2020-06-09 | 上海海立电器有限公司 | 一种电机控制结构及具有其的一体化电机 |
US10741313B1 (en) * | 2019-02-06 | 2020-08-11 | Eaton Intelligent Power Limited | Bus bar assembly with integrated surge arrestor |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE744556C (de) * | 1941-04-23 | 1944-11-16 | Karl Schroeder | Stern-Dreieckschalter fuer Drehstrommotoren |
DE864711C (de) * | 1944-03-28 | 1953-01-26 | Brown Ag | Schalter zur Beeinflussung des Betriebszustandes von Elektromotoren, insbesondere Drehstrommotoren |
US3624471A (en) * | 1970-04-22 | 1971-11-30 | Smith Corp A O | Apparatus for progressive phase switching from wye to delta connection of three-phase motor |
CN85102382B (zh) * | 1985-04-01 | 1988-06-08 | 华中工学院 | 谐波起动方法及按该方法起动的电动机 |
JPH01164294A (ja) * | 1987-12-19 | 1989-06-28 | Fanuc Ltd | 工作機械のスピンドル駆動制御装置 |
DD268569A1 (de) | 1988-01-26 | 1989-05-31 | Thueringer Moebel | Schaltvorrichtung fuer einen stern-dreieck-schuetz |
US5142213A (en) * | 1991-04-16 | 1992-08-25 | Master Control Systems, Inc. | Wye-delta open transition motor starter with leading phase monitor and method of use |
US5686774A (en) * | 1995-01-03 | 1997-11-11 | The United States Of America As Represented By The Department Of Energy | Reduced vibration motor winding arrangement |
US6025693A (en) * | 1997-10-20 | 2000-02-15 | Smith; Otto J. M. | Motor starter |
SI20293A (sl) | 1999-03-24 | 2000-12-31 | Alojz Lovren�i� | Preklopni element zvezda - trikot |
KR20000073458A (ko) * | 1999-05-11 | 2000-12-05 | 권수영 | 스타-델타 결선용 전자개폐기 |
JP3948009B2 (ja) * | 2001-10-03 | 2007-07-25 | 株式会社安川電機 | 3相交流電動機の巻線切換装置 |
US6894455B2 (en) * | 2003-04-30 | 2005-05-17 | Remy Inc. | Performance improvement of integrated starter alternator by changing stator winding connection |
IL188884A (en) * | 2008-01-20 | 2010-11-30 | Ilya Rabinovich | Star-delta many levels starter for an ac induction motor |
DE102014105579A1 (de) * | 2014-04-17 | 2015-10-22 | Eaton Electrical Ip Gmbh & Co. Kg | Schaltvorrichtung für eine Stern-Dreieck-Umschaltung bei einem mehrphasigen Motor |
US9746521B2 (en) * | 2014-11-06 | 2017-08-29 | Rockwell Automation Technologies, Inc. | 6-pole based wye-delta motor starting system and method |
US9806642B2 (en) * | 2014-11-06 | 2017-10-31 | Rockwell Automation Technologies, Inc. | Modular multiple single-pole electromagnetic switching system and method |
US9893644B1 (en) * | 2016-11-15 | 2018-02-13 | International Business Machines Corporation | Electric power devices with automatically established input voltage connection configuration |
-
2014
- 2014-04-17 DE DE102014105579.9A patent/DE102014105579A1/de not_active Ceased
-
2015
- 2015-02-27 US US15/303,740 patent/US10283297B2/en active Active
- 2015-02-27 EP EP15706825.5A patent/EP3132534A2/de not_active Withdrawn
- 2015-02-27 WO PCT/EP2015/054154 patent/WO2015158457A2/de active Application Filing
- 2015-02-27 CN CN201580019781.1A patent/CN106233611B/zh not_active Expired - Fee Related
- 2015-02-27 CA CA2945545A patent/CA2945545A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE102014105579A1 (de) | 2015-10-22 |
US10283297B2 (en) | 2019-05-07 |
CN106233611B (zh) | 2018-12-04 |
WO2015158457A3 (de) | 2016-01-07 |
CA2945545A1 (en) | 2015-10-22 |
US20170032916A1 (en) | 2017-02-02 |
CN106233611A (zh) | 2016-12-14 |
WO2015158457A2 (de) | 2015-10-22 |
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