DE102012025049A1 - Method for producing a synchronous motor - Google Patents

Method for producing a synchronous motor

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Publication number
DE102012025049A1
DE102012025049A1 DE201210025049 DE102012025049A DE102012025049A1 DE 102012025049 A1 DE102012025049 A1 DE 102012025049A1 DE 201210025049 DE201210025049 DE 201210025049 DE 102012025049 A DE102012025049 A DE 102012025049A DE 102012025049 A1 DE102012025049 A1 DE 102012025049A1
Authority
DE
Germany
Prior art keywords
stator
groove
windings
synchronous motor
region
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.)
Pending
Application number
DE201210025049
Other languages
German (de)
Inventor
Torsten Schmitz
Roger Tresch
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE201210025049 priority Critical patent/DE102012025049A1/en
Publication of DE102012025049A1 publication Critical patent/DE102012025049A1/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K15/00Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/08Forming windings by laying conductors into or around core parts
    • H02K15/095Forming windings by laying conductors into or around core parts by laying conductors around salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • H02K1/146Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148Sectional cores
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings

Abstract

The invention relates to a method for producing a synchronous motor and a synchronous motor, wherein a stator (100), which is designed as an external stator and at least two poles and grooves (1-12), which are provided with stator windings 37. In order to produce even small, very fast-running synchronous motor with the least possible effort, it is provided that the stator (100) is separated before the application of the stator windings (37) and expanded into a strip, wherein the stator windings (37) in each case axially a groove (1-12) guided, then radially outward and then on an outer side (38) of the stator axially (100) are returned and the strip is then closed annularly

Description

  • The invention relates to a method for producing a synchronous motor according to the preamble of patent claim 1 and to a synchronous motor produced by such a method according to claim 9.
  • Synchronous motors are used in many areas of technology. Small, very fast-running synchronous motors have a small number of poles, typically two poles and relatively large copper cross sections. This leads to large winding heads and thus, since an axial length between the motor bearings is limited, to a reduction of the axial length of iron.
  • Although a winding around each tooth of the synchronous motor would avoid this problem, but this would lead to significant losses, with only a limited power density would be achievable, since only a small portion of about half of the total flux is coupled to the winding.
  • For small, very fast synchronous motors is typically a uniform, especially sinusoidal field distribution is desired. This requires a distributed three-phase winding, which is longed for if possible. This can be, for example, a classic two-layer winding. However, in the case of small synchronous motors, this leads to the fact that the copper cross section to be introduced is greater than the free cross section of the stator bore due to the combination of large copper cross section and small diameter of the stator bore. An introduction of the winding from the inside is then associated with very high costs.
  • The invention has for its object to provide a simple manufacturing process for producing in particular small, very fast-running synchronous motor with low winding lengths.
  • This is achieved with the features of claim 1 and claim 9 according to the invention. Advantageous developments can be found in the dependent claims. In a method for producing a synchronous motor, wherein a stator, which is formed as an external stator and having at least two poles and grooves, which are provided with stator windings, is provided according to the invention that the stator is separated before the application of the stator windings and expanded into a strip wherein the stator windings each guided axially through a groove, then returned radially outwardly and then axially on an outer side of the stator and the strip is then closed annularly.
  • By such a procedure, even small, very fast rotating synchronous motors with speeds of, for example, over 100,000 min -1 can be produced with relatively little effort. By a separation and unwinding of the stator, the windings can be easily generated, with a copper cross-section can easily be greater than a diameter of the stator bore. The radial outward guiding and an axial return outside a yoke of the stator results in a coil with a relatively short wire length. In the region of the return on the outer peripheral surface of the stator can then be influenced without great effort, a leakage inductance. For example, depending on the design of the iron core of the stator, the leakage inductance is reduced or amplified in the region of the feedback without substantially changing the fundamental functions of the synchronous motor. As a result, for example, otherwise required throttles can be replaced. In operation, it may be provided to actively or passively reheat the returned winding in a relatively short path.
  • In order to achieve a uniform, in particular sinusoidal field distribution, the stator windings are advantageously designed as three-phase windings, in particular as two-layer windings. These windings can be longing.
  • Preferably, the stator is separated in the region of a groove. Such a separation is relatively easy to carry out, especially since the stator in the region of the grooves has a smaller cross-sectional area than in the region of the poles. In order to be able to unwind the stator well, it is advantageous in addition to the complete separation in the region of a groove to make partial separations, which begin radially inside, in the region of further grooves. For example, such a partial separation can take place in the region of every other groove. Windings with different phases are then preferably placed in these grooves.
  • In an alternative embodiment, the stator is completely separated in a pole and in other poles are partially provided on a radial inner side separations, in particular in every second pole a separation is made.
  • Although this increases the expense of producing the separations, the risk of winding defects is reduced.
  • In a preferred embodiment, each groove is divided into a right half and a left half, in each of which a coil layer is arranged side by side in the circumferential direction. This can reduce the required wire length.
  • The object is achieved according to the invention in a synchronous motor with a stator, which is designed as an external stator and having at least two poles and grooves, which are wound with stator windings, that it is produced by the method described above, wherein the stator at least one in particular having closed separation point, wherein stator windings are each guided axially back axially through a groove and radially outwards and on an outer side of the stator. Such a synchronous motor can be designed as a small, very fast-running synchronous motor, which has sufficiently large copper cross-sections and a uniform field distribution. A combination of large copper cross section and small diameter of the stator bore is easily possible. In this case, such a synchronous motor with little effort and, accordingly, inexpensive to produce.
  • For a uniform as possible, in particular sinusoidal field distribution, it is advantageous if the stator windings are formed as three-phase windings, in particular as two-layer windings.
  • A particularly simple embodiment results from the fact that the separation point is formed in the region of a groove, wherein in particular in the region of each second groove, an at least partial separation point is formed, which extends radially outward on a radial inner side of the stator.
  • In an alternative embodiment, which requires only a slightly higher effort, the separation point can also be formed in the region of a pole, wherein in particular in the region of each second pole, an at least partial separation point is formed.
  • A pole number of the synchronous motor is preferably equal to two. This small, very fast-running synchronous motors can be formed.
  • With a corresponding ratio between an axial length of the synchronous motor to its diameter can be achieved in connection with the winding according to the invention short wire lengths.
  • Advantageous embodiments, which are described in connection with the manufacturing process, naturally also apply to the synchronous motor produced by this method and vice versa.
  • The drawing illustrates an embodiment of the invention. It shows
  • 1 : A spatially developed stator in a spatial representation,
  • 2 a stator provided with stator windings,
  • 3 : a classic winding scheme and
  • 4 an inventive winding scheme.
  • In 1 one recognizes a strip developed as a strip 100 with grooves 1 - 12 between pole teeth 13 - 24 of the stator 100 are formed. A complete separation point 25 forms ends of the unwound strip. In every second groove 2 . 4 . 6 . 8th . 10 , is a partial separation point 26 . 27 . 28 . 29 . 30 formed so that the stator through the separation points in part-circular segments 31 . 32 . 33 . 34 . 35 . 36 is divided.
  • The groove 1 is located in the segment following the complete separation point 31 that in the illustration according to 1 located on the left. The individual segments 31 - 36 can now be wound from left to right with the phases 1 positive, 2 negative, 3 positive, 1 negative, 2 positive and 3 negative.
  • After winding, the stator becomes 100 closed in a circle and thus brought into its final form. The finished wound stator 100 is in 2 shown. It can be seen that stator windings 37 are axially guided by a groove and then extend radially outward to then axially over an outer side 38 of the stator 100 to be returned axially. Then the stator windings are again guided radially inward back into the respective groove.
  • It can be seen that a diameter of a stator bore 39 relatively small in relation to the copper cross-section. The inventive manufacturing method, such a synchronous motor can still be produced with relatively little effort.
  • In 3 a classical winding diagram of a shortened two-layer winding is shown. A coil goes into groove 1 off and goes in a positive, axial direction through the groove 1 , The coil reaches the groove over a circumference 6 and goes there in a negative axial direction. Then it is over the circumference back to the groove 1 guided.
  • In such a winding, a wire length of a coil is twice the axial length and twice the distance at the end sides along the circumference. For this length, it leads the current in groove 1 in positive direction and in groove 6 in a negative direction.
  • In the winding scheme according to the invention, as in 4 is shown, now follows the same coil of phase 1 in groove 1 in positive axial direction through groove 1 , then goes radially outward and returns via an outer side of the yoke or the stator in the negative axial direction and then radially inwardly back into the groove 1 , In this case, each groove can be divided into two circumferentially adjacent halves, for example, in a right half and a left half. The wire length of such a wound coil then corresponds to twice the axial length plus two times the radial length. The current is passed through a groove either positive or negative. In order to obtain the same effect as according to the classical winding scheme, two coils are therefore required.
  • In the grooves, the separation points for unrolling the stator 100 advantageously lie layers with different phases. This corresponds in the embodiment of the grooves with even numbers.
  • The inventive combination of providing at least one separation point in the stator with the special winding scheme small, very fast-running synchronous machines can be produced with little effort, in which additionally the wire lengths of the windings can be kept small. In this case, the copper cross-sections can easily be formed larger than a cross-section of the stator bore and designed accordingly powerful.
  • LIST OF REFERENCE NUMBERS
  • 1-12
    groove
    13-24
    pole teeth
    25
    complete separation point
    26-30
    partial separation points
    31-36
    segments
    37
    stator windings
    38
    outside
    39
    stator
    100
    stator

Claims (12)

  1. Method for producing a synchronous motor, wherein a stator ( 100 ), which is designed as an external stator and at least two poles and grooves ( 1 - 12 ), which with stator windings 37 be provided, characterized in that the stator ( 100 ) before applying the stator windings ( 37 ) is separated and expanded into a strip, wherein the stator windings ( 37 ) each axially through a groove ( 1 - 12 ), then radially outward and then on an outer side ( 38 ) of the stator axially ( 100 ) are returned and the strip is then closed annularly.
  2. Method according to claim 1, characterized in that the stator windings ( 37 ) are designed as three-phase windings, in particular as two-layer windings.
  3. Method according to claim 1 or 2, characterized in that the stator ( 100 ) in the region of a groove ( 12 ) is separated.
  4. Method according to claim 3, characterized in that the stator ( 100 ) in a groove ( 12 ) completely and in further grooves ( 2 . 4 . 6 . 8th . 10 ) is partially separated starting at a radial inner side, wherein in each case a second separation is made in each second groove.
  5. Method according to one of claims 3 or 4, characterized in that in grooves ( 2 . 4 . 6 . 8th . 10 . 12 ), which have a separation, windings ( 37 ) with different phases.
  6. Method according to one of claims 1 or 2, characterized in that the stator ( 100 ) is separated in the region of a pole.
  7. Method according to claim 6, characterized in that the stator ( 100 ) is separated completely in one pole and partially in a second poles at a radial inner side, wherein in each case a separation is made in each second pole.
  8. Method according to one of the preceding claims, characterized in that each groove ( 1 - 12 ) is divided into a right half and a left half, in each of which a coil layer is arranged.
  9. Synchronous motor with a stator ( 100 ), which is designed as an external stator and at least two poles and groove ( 1 - 12 ), which are connected to stator windings ( 37 ), characterized in that it is produced by a method according to one of the preceding claims, wherein the stator ( 100 ) at least one in particular closed separation point ( 25 ), wherein stator windings ( 37 ) each axially through a groove ( 1 - 12 ), radially outward and on an outside ( 38 ) of the stator ( 100 ) are returned axially.
  10. Synchronous motor according to claim 9, characterized in that the stator windings ( 37 ) are designed as three-phase windings, in particular as two-layer windings.
  11. Synchronous motor according to claim 9 or 10, characterized in that the separation point ( 25 ) in the region of a groove ( 12 ) is formed, wherein in particular in the region of each second groove ( 2 . 4 . 6 . 8th . 10 ) an at least partial separation point ( 26 - 30 ) is trained.
  12. Synchronous motor according to claim 9 or 10, characterized in that the separation point is formed in the region of a pole, wherein in particular in the region of each second pole, an at least partial separation point is formed
DE201210025049 2012-12-20 2012-12-20 Method for producing a synchronous motor Pending DE102012025049A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201210025049 DE102012025049A1 (en) 2012-12-20 2012-12-20 Method for producing a synchronous motor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201210025049 DE102012025049A1 (en) 2012-12-20 2012-12-20 Method for producing a synchronous motor
PCT/EP2013/076774 WO2014095768A2 (en) 2012-12-20 2013-12-16 Method for producing a synchronous motor
JP2015548418A JP6080977B2 (en) 2012-12-20 2013-12-16 Synchronous motor manufacturing method

Publications (1)

Publication Number Publication Date
DE102012025049A1 true DE102012025049A1 (en) 2014-06-26

Family

ID=49765538

Family Applications (1)

Application Number Title Priority Date Filing Date
DE201210025049 Pending DE102012025049A1 (en) 2012-12-20 2012-12-20 Method for producing a synchronous motor

Country Status (3)

Country Link
JP (1) JP6080977B2 (en)
DE (1) DE102012025049A1 (en)
WO (1) WO2014095768A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3358715A4 (en) * 2015-09-30 2018-11-07 Nidec Sankyo Corporation Stator, motor, and pump device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69735741T2 (en) * 1996-02-23 2006-09-14 Matsushita Electric Industrial Co., Ltd., Kadoma Engine

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
JPS6259538B2 (en) * 1979-04-13 1987-12-11 Shibaura Eng Works Ltd
JPH03285541A (en) * 1990-03-30 1991-12-16 Hitachi Ltd Capacitor induction motor
JP2000023397A (en) * 1998-07-07 2000-01-21 Shibaura Mechatronics Corp Stator core of motor and manufacturing method of motor using the same
JP2000175386A (en) * 1998-12-03 2000-06-23 Mitsubishi Electric Corp Toroidal stator
JP3983423B2 (en) * 1999-07-23 2007-09-26 松下電器産業株式会社 Electric motor
JP3607849B2 (en) * 2000-02-21 2005-01-05 三菱電機株式会社 Electric motor stator core
TW508891B (en) * 2000-02-21 2002-11-01 Misubishi Electric Corp Stator iron core of electric motor, manufacturing method thereof, electric motor, and compresor
JP2007028703A (en) * 2005-07-12 2007-02-01 Mitsubishi Electric Corp Toroidal winding rotary electric machine
WO2008139531A1 (en) * 2007-04-27 2008-11-20 Mitsui High-Tec, Inc. Laminated iron core and production of the same
JP2010068686A (en) * 2008-09-12 2010-03-25 Honda Motor Co Ltd Stator for electrical rotating machine
JP5253098B2 (en) * 2008-11-07 2013-07-31 トヨタ自動車株式会社 Rotating electric machine
JP4828666B2 (en) * 2009-08-06 2011-11-30 パナソニック株式会社 Synchronous motor and synchronous motor drive system
JP5652305B2 (en) * 2011-04-07 2015-01-14 トヨタ自動車株式会社 Stator for rotating electrical machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69735741T2 (en) * 1996-02-23 2006-09-14 Matsushita Electric Industrial Co., Ltd., Kadoma Engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3358715A4 (en) * 2015-09-30 2018-11-07 Nidec Sankyo Corporation Stator, motor, and pump device

Also Published As

Publication number Publication date
WO2014095768A3 (en) 2015-03-26
JP6080977B2 (en) 2017-02-15
WO2014095768A2 (en) 2014-06-26
JP2016500510A (en) 2016-01-12

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