DE102018207787B3 - Electric machines and manufacture of an electric machine - Google Patents

Electric machines and manufacture of an electric machine

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Publication number
DE102018207787B3
DE102018207787B3 DE102018207787.8A DE102018207787A DE102018207787B3 DE 102018207787 B3 DE102018207787 B3 DE 102018207787B3 DE 102018207787 A DE102018207787 A DE 102018207787A DE 102018207787 B3 DE102018207787 B3 DE 102018207787B3
Authority
DE
Germany
Prior art keywords
busbars
tabs
busbar
electric machine
stator windings
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.)
Active
Application number
DE102018207787.8A
Other languages
German (de)
Inventor
Christian Heine
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.)
Magna Powertrain Bad Homburg GmbH
Original Assignee
Magna Powertrain Bad Homburg GmbH
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 Magna Powertrain Bad Homburg GmbH filed Critical Magna Powertrain Bad Homburg GmbH
Priority to DE102018207787.8A priority Critical patent/DE102018207787B3/en
Application granted granted Critical
Publication of DE102018207787B3 publication Critical patent/DE102018207787B3/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/46Fastening of windings on the stator or rotor structure
    • H02K3/50Fastening of winding heads, equalising connectors, or connections thereto
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2203/00Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Abstract

The invention relates to an electrical machine, which is electrically connected for contacting the stator windings, an end region of a respective stator winding wire of the respective stator winding with an associated busbars, wherein in each case a busbar has a bent from the planes of the busbars tab, wherein the tabs of the busbar of Furthermore, the invention relates to a method for producing such a machine.

Description

  • The invention relates to an electrical machine, which is electrically connected for contacting the stator windings, an end region of a respective Statorwicklungsdrahtes the respective stator winding with an associated busbar, each having a busbar bent from the planes of the busbars tabs, wherein the tabs of the busbar of the respective stator windings are offset from one another in the circumferential direction. Furthermore, the invention relates to a method for producing such a machine.
  • State of the art
  • In BLDC motors, such as those used as fan motors, the electrical phases are connected to the engine electronics via a busbar.
    Conventionally, an annular bus bar is provided on an axial end surface of a cylindrical stator core. Such busbar is for example in the DE 11 2008 001 219 T5 described.
  • Usually, the rail parts of the busbar each have a stamped contact, which are arranged radially in a plastic carrier. The radial arrangement requires three different punching and bending tools for the production of the three rail parts for the phases of the motor.
  • From the DE 10 2011 100 843 A1 an electric motor is known, which has bent, in particular bent-up tabs, which protrude from the potting compound, wherein the tabs of the rail parts of the respective stator windings offset from one another in the circumferential direction, in particular in the circumferential direction spaced apart, are arranged. Statorwickeldrähte are guided directly into a slot of the busbars.
  • From the DE 10 2012 023 477 A1 a switching element is known, which forms a hybrid element with which both the motor windings switched as well as the contacts to the electric motor and the controller made as well as in the electric motor, the area between the engine and the electronics compartment can be sealed. The switching element consists of three identical bodies with spring tongues, which are bent out of the plane of the body.
  • From the US 2016 0 028 286 A1 is a shift rail is known, which is also composed of several parts. In this case, tabs extend out of the plane of the base body.
  • It is an object of the invention to produce busbars for the phase connection of an electrical machine simply and cost-effectively and to position them appropriately to one another.
  • Description of the invention
  • The object is achieved with an electrical machine, which is electrically connected for contacting the stator windings in the end region of a respective Statorwicklungsdrahtes the respective stator winding with an associated busbars, each having a busbar bent from the planes of the busbars tabs, wherein the tabs of the busbars respective stator windings are circumferentially offset from each other, wherein the stator windings are connected to a second set of tabs, which are also bent out of the plane of the busbars and arranged rotated by 180 ° to the first set of tabs.
  • The inventive solution to the problem is that both the contacts to the winding heads and the contacts for electrical supply are arranged axially.
    Due to the axial arrangement, the individual contacts may consist of identical parts and no different punching and bending tools will be used. By the invention, identical parts can be used. This results in reduced tooling costs. By a suitable choice of geometry, the waste can be kept low during punching.
  • The advantageous embodiment is such that the busbar has at least one central web, wherein a first and a second arm are arranged offset relative to the plane of the central web via bending points.
  • Advantageously, the busbar shows adjacent tabs at least at one end.
  • The embodiment is such that the tabs are bent over a respective bending point from the respective plane.
  • In this case, the bus bar on a web-shaped tab and two fork-shaped tabs.
  • For the construction of the electric machine it is necessary that three busbars are stackable over and in one another.
  • It is advantageous that each bus bar has two tabs for connection to the stator windings in the end region of the respective stator winding wire, wherein the two stator windings are offset by 180 ° to one another.
  • The method according to the invention for producing an electric machine with busbars proceeds in the following steps: punching the busbars, bending the busbars at the bending points, mounting and connecting the busbars on the stator windings and casting the stator against the busbars for insulation against each other.
  • In an alternative method, the bus bars are suitably insulated from each other prior to mounting on the stator windings.
  • list of figures
  • The invention will now be described by way of example with reference to the accompanying drawings.
    • 1 shows a schematic representation of the exemplary embodiment as a stamped part,
    • 2 shows the busbar in the bent state,
    • 3 shows three busbars in the assembly.
  • 1 shows a bus bar according to the invention, as it is produced as a stamped part. The busbar 1 consists of a central pier 2e from the arms on both sides depart at an obtuse angle. It is a first arm 6 and a second arm 7 , The two arms 6 . 7 At the end also run over obtuse angles in tabs. The first arm ends here 6 in a pair of straps, a tab 3 a first set of latches and a tab 4 ,
  • The two tabs 3,4 extend parallel to each other in the flat stamped part. The second arm 7 ends in a tab 4 of the second set of latches. The tab 3 has a web-shaped training. The tabs 4 In contrast, have a forked connection 5 on.
  • The flat stamped part already indicates bending points 2 which are used for the further manufacturing process. Here is the middle bridge 2e connected to the arms via bending points. About the bend 2 B becomes the first arm 6 bent, over the bend 2c the second arm 7 , The tabs are over the bend 2a . 2d connected with the respective arms.
  • With this choice of geometry, busbars can be arranged with the same amount of common parts.
    In 2 a busbar is shown after the bending process. It is clear that all tabs from the level of the respective arms 6 . 7 be bent out by 90 °. The bar-shaped flap 3 for electrically contacting the busbar and the stator windings 10 serves is at the bend 2a right-angled from the plane of the first arm 6 bent. The parallel to this tab 3 lying tab 4 became perpendicular from the plane of the arm 6 bent down. On the other side of the busbar is the tab 4 of the second set of latches over the bending point 2d from the level of the second arm 7 bent 90 ° downwards.
    The two tabs 4 are always bent in the same direction, the tab 3 of the first set of latches is rotated by 180 ° upwards.
  • Furthermore, at the bend 2c the central pier 2e the busbar 1 bent down, at the bend 2 B becomes the first arm 6 bent down again.
  • In the 3 schematically an assembly of the busbars is shown.
  • It is an electric machine 20 outlined, among others, stator windings 10 a stator contains. The stator winding wires 11 , which are also indicated only schematically, are tabs 4 , the second set of latches contacted.
  • In the 3 is based on an electric machine that operates with three phases, one phase are each associated with two Statorwicklungspakete.
  • An example is a busbar 1 over tabs 4a and 4b each with a stator winding package 10a or 10b connected. The fork-shaped design of the tabs 4a and 4b allows easy connection with the stator winding wires 11 , The tab for the electrical connection 3a is in this figure from above and can be contacted in a simple manner to the outside. The busbars are made completely identical and are - as shown in the figure - arranged after their isolation by a Umspritzungs-operation on each other. In each case, a second arm engages over a first arm of the adjacent busbar.
  • For the production of the busbar follows a bending process on the inventory process. The curved bus bar must be insulated, and any overmolding operation known to those skilled in the art can be selected.
  • Subsequently, the busbars are connected to the respective stator windings and are thus prepared for electrical contacting of the stator winding packages.
  • In an alternative manufacturing process, the busbars are not encapsulated from one another in an insulating manner before being assembled on the stator. In doing so, the busbars must not touch each other directly when they are arranged one on top of the other.
  • When contacting over the tabs 4 is selected on the stator so that no contact between the busbars takes place with each other, the stator with the tabs 4 and the busbars 1 be poured together.
  • In this case, the insulating material penetrates between the arms of the busbars and prevents electrical contact.
  • Alternatively, it is also conceivable to provide suitable spacers between the arms of the busbars, which are encapsulated with and perhaps melt as lost spacers in the potting compound.
  • LIST OF REFERENCE NUMBERS
  • 1
    bus
    2a, 2b, 2c, 2d
    bends
    2e
    center web
    3
    Laschen first sentence
    4, 4a, 4b
    Flap second sentence
    5
    Fork-shaped connector
    6
    first arm
    7
    second arm
    10, 10a, 10b
    stator windings
    11
    Statorwickeldraht
    20
    Electric machine

Claims (7)

  1. An electric machine (20), which is electrically connected to an associated busbar (1) for contacting the stator windings (10) in the end region of a respective stator winding wire (11) of the respective stator winding (10), one busbar (1) each of the planes the busbars (1) have bent tabs (3), wherein the tabs (3) of the busbars of the respective stator windings (10) are offset from one another in the circumferential direction, the stator windings (10) being connected to a second set of tabs (4), which are also bent out of the plane of the busbars (1) and the first set of tabs (3) rotated by 180 °, wherein the busbar (1) at least one central web (2e), wherein via bending points (2b, 2c) a first and a second arm (6, 7) offset from the plane of the central web (2e) are arranged and wherein the tabs (3,4) via a respective bending point (2a, 2d) from the respective plane the poor (6,7) are bent ..
  2. Electric machine (20) after Claim 1 , characterized in that the busbar (1) has at least at one end adjacent tabs (3,4).
  3. Electric machine (20) after a Claim 1 or 2 , characterized in that the busbar (1) has a web-shaped tab (3) and two fork-shaped tabs (4).
  4. Electric machine (20) after a Claim 1 to 3 Characterized in that three busbars (1) and are nestable.
  5. Electric machine (20) after a Claim 1 to 4 , characterized in that each busbar (1) has two tabs (4a, 4b) for connection to the stator windings (10a, 10b) in the end region of the respective stator winding wire (11), the two stator windings (10a, 10b) being offset by 180 ° to stand by each other.
  6. Method for producing an electric machine (20) with busbars according to Claims 1 to 5 characterized by the step of: punching the busbars (1), bending the busbars (1) at the flexures (2), assembling and connecting the busbars (1) to the stator windings (10), and casting the stator around the busbars (1) for isolation against each other.
  7. Method for producing an electric machine (20) with busbars according to Claims 1 to 5 characterized by the step of: stamping the busbars (1), bending the busbars (1) at the flexures (2), overmolding the busbars (1) for isolation from each other, assembling and connecting the busbars (1) to the stator windings (10) ,
DE102018207787.8A 2018-05-17 2018-05-17 Electric machines and manufacture of an electric machine Active DE102018207787B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102018207787.8A DE102018207787B3 (en) 2018-05-17 2018-05-17 Electric machines and manufacture of an electric machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018207787.8A DE102018207787B3 (en) 2018-05-17 2018-05-17 Electric machines and manufacture of an electric machine
PCT/EP2019/055555 WO2019219256A1 (en) 2018-05-17 2019-03-06 Electrical machine and production of an electrical machine

Publications (1)

Publication Number Publication Date
DE102018207787B3 true DE102018207787B3 (en) 2019-10-10

Family

ID=65686883

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (2)

Country Link
DE (1) DE102018207787B3 (en)
WO (1) WO2019219256A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347483A1 (en) * 2003-09-30 2005-05-12 Bosch Gmbh Robert Electric machine
DE212006000034U1 (en) * 2005-07-28 2008-01-31 Thyssenkrupp Presta Ag Stator for an electric motor
DE102007061107A1 (en) * 2006-12-25 2008-06-26 Mitsubishi Cable Industries, Ltd. Insulating motor housing
DE112008001219T5 (en) 2007-05-29 2010-03-04 Toyota Jidosha Kabushiki Kaisha, Toyota-shi Connection module for a rotating electrical machine, rotating electrical machine and method of making the same
DE102011008386A1 (en) * 2010-01-15 2011-07-21 Gate S.R.L. Stand connector
DE102011100843A1 (en) 2011-05-06 2012-11-08 Sew-Eurodrive Gmbh & Co. Kg Electromotor, has rail parts encapsulated by casting material and associated with stator windings, where high-curved flaps of rail parts of respective windings are arranged at distance from each other in circumferential direction
DE102012023477A1 (en) 2012-11-28 2014-05-28 Ziehl-Abegg Se Shift element for electromotor has base having outer rim and/or edge of passage opening designed as sealing edge
US20160028286A1 (en) 2013-03-08 2016-01-28 Kayaba Industry Co., Ltd. Bus bar unit
US20160036187A1 (en) * 2013-03-08 2016-02-04 Kayaba Industry Co., Ltd. Manufacturing method of bus bar unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5930801B2 (en) * 2012-03-30 2016-06-08 日立オートモティブシステムズ株式会社 In-vehicle motor and electric power steering apparatus using the same
CN105099036A (en) * 2014-05-12 2015-11-25 舍弗勒技术股份两合公司 Motor and manufacturing method thereof, and vehicle driving apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347483A1 (en) * 2003-09-30 2005-05-12 Bosch Gmbh Robert Electric machine
DE212006000034U1 (en) * 2005-07-28 2008-01-31 Thyssenkrupp Presta Ag Stator for an electric motor
DE102007061107A1 (en) * 2006-12-25 2008-06-26 Mitsubishi Cable Industries, Ltd. Insulating motor housing
DE112008001219T5 (en) 2007-05-29 2010-03-04 Toyota Jidosha Kabushiki Kaisha, Toyota-shi Connection module for a rotating electrical machine, rotating electrical machine and method of making the same
DE102011008386A1 (en) * 2010-01-15 2011-07-21 Gate S.R.L. Stand connector
DE102011100843A1 (en) 2011-05-06 2012-11-08 Sew-Eurodrive Gmbh & Co. Kg Electromotor, has rail parts encapsulated by casting material and associated with stator windings, where high-curved flaps of rail parts of respective windings are arranged at distance from each other in circumferential direction
DE102012023477A1 (en) 2012-11-28 2014-05-28 Ziehl-Abegg Se Shift element for electromotor has base having outer rim and/or edge of passage opening designed as sealing edge
US20160028286A1 (en) 2013-03-08 2016-01-28 Kayaba Industry Co., Ltd. Bus bar unit
US20160036187A1 (en) * 2013-03-08 2016-02-04 Kayaba Industry Co., Ltd. Manufacturing method of bus bar unit

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