CN111817471A - Stator for three-phase electric motor - Google Patents
Stator for three-phase electric motor Download PDFInfo
- Publication number
- CN111817471A CN111817471A CN202010281344.XA CN202010281344A CN111817471A CN 111817471 A CN111817471 A CN 111817471A CN 202010281344 A CN202010281344 A CN 202010281344A CN 111817471 A CN111817471 A CN 111817471A
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- stator
- contact
- carrier
- preparation
- coil
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- 238000004804 winding Methods 0.000 claims abstract description 115
- 239000012212 insulator Substances 0.000 claims abstract description 19
- 239000004020 conductor Substances 0.000 claims description 54
- 238000003466 welding Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000008358 core component Substances 0.000 claims description 7
- 238000001746 injection moulding Methods 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims 30
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 239000000306 component Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 2
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/15—Mounting arrangements for bearing-shields or end plates
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The present invention relates to a stator for a three-phase electric motor. The stator has a hollow-cylindrical coil carrier and a plurality of stator coils which are each wound on winding projections of the carrier and which are oriented parallel to the longitudinal center axis of the carrier and are arranged distributed around the longitudinal center axis in the carrier. The wire ends of each stator coil form phase winding contact ends for contacting the stator coil with three or winding contact ends for interconnecting the stator coils with each other. At least one end contact unit is formed at an axial switching end of the carrier body, said end contact unit comprising phase winding contact ends of the stator coils of the stator for three phases. The phase winding contact ends of the stator coils in the end contact units are correspondingly electrically contacted by means of the interconnection means. The stator has an electrically insulating insulator which surrounds the interconnection means at least in some regions in a form-fitting manner and electrically insulates the phase winding contact ends, which are in electrical contact with one another via the interconnection means, from one another in a corresponding manner.
Description
Technical Field
The present invention relates to a stator for a three-phase electric motor according to the preamble of claim 1.
Background
Electric motors are known from the prior art. The internal electric motor has a stator and a rotor arranged coaxially in the stator, which is connected in a rotationally fixed manner to the drive shaft. The stator has a plurality of winding coils which are arranged in an electrical insulator so as to be distributed around the rotor in the circumferential direction. The winding coils are interconnected in circuit with each other, whereby the winding coils are in electrical contact with each other (e.g., welded) at a wire end at one axial end of the stator thereof. The three-phase current of the external current source may then be applied to the winding coil, whereby the phase contacts of the current source must be in electrical contact (e.g. soldered) with the interconnected wire ends of the winding coil. If three-phase currents are applied to the wire ends of the respective winding coils, a rotating magnetic field is generated in the stator and the rotor is rotated.
The individual wire ends of the winding coil, as well as the wire ends that are in contact with one another and the phase contacts of the current source, must be electrically contacted and insulated from one another, which is often associated with high outlay.
Disclosure of Invention
The object of the present invention is therefore to propose an improved or at least alternative embodiment for a stator of the generic type, in which the described disadvantages are overcome.
The stator for a three-phase electric motor has a hollow-cylindrical coil carrier and a plurality of stator coils which are each wound on winding projections of the coil carrier and which are oriented parallel to a longitudinal center axis of the coil carrier and are arranged distributed around the longitudinal center axis in the coil carrier. The wire ends of the individual stator coils form phase winding contact ends for contacting the stator coils with three phases or winding contact ends for interconnecting the stator coils to one another. At least one end contact unit is formed at an axial switching end of the coil carrier, said at least one end contact unit comprising phase winding contact ends of a plurality of stator coils of the stator for three phases (U, V, W). The respective phase winding contact ends of the stator coils in the end contact units are correspondingly electrically contacted by means of an interconnection device. According to the invention, the stator has an electrically insulating insulator which surrounds the interconnection means at least in some regions in a form-fitting manner and electrically insulates the phase winding contact ends, which are in electrical contact with one another via the interconnection means, from one another in a corresponding manner.
The insulation carrier body surrounds the interconnection device at least in some areas in a form-fitting manner, so that the respective phase winding contact ends are reliably electrically contacted to one another via the interconnection device and are correspondingly electrically insulated from one another. The phase winding contact ends of the stator coils are formed by the wire ends of the stator coils wound onto the winding overhangs. Suitably, electrically conductive components of the interconnection means protrude from the insulating body in order to interconnect the stator coils to each other by means of the interconnection means and to be connectable to an external current source. The insulating body can be made of an electrically insulating plastic, for example, and can be extruded around the interconnection device in a plastic injection molding process. Subsequently, the insulating carrier body surrounds the interconnection device in a form-fitting manner and is fixed thereto in a non-detachable form-fitting manner. Furthermore, the intermediate space in the interconnection device is filled with an electrically insulating plastic material by means of an insulator and the individual phase winding contact ends are reliably electrically insulated from one another.
The phase winding contact ends of the stator coils are combined into an end contact unit. The stator can have one end contact unit and also a plurality of end contact units and accordingly one interconnection device and also a plurality of interconnection devices. The number of interconnection means then corresponds to the number of end contact units in the stator. The phase winding contact ends in the respective end contact units are then correspondingly electrically contacted to each other via the contact strips of the respective interconnection device. For simplicity, the following description refers to a stator having one end contact unit and one interconnection means. If the stator has a plurality of end contact units and a plurality of interconnection means, they can be constructed identically to one another.
The coil carrier advantageously can have an electrically insulating carrier block and an electrically conductive conductor core block. A plurality of winding projections or stator teeth of the coil carrier are formed by the conductor core block and by an insulating carrier block surrounding the conductor core block, so that the stator coil wound on the respective winding projection is electrically insulated from the conductor core block by the insulating carrier block. The insulating carrier block and the insulating body of the coil carrier can be formed from plastic. The insulating body is then fixed to the insulating carrier block of the coil carrier in a form-fitting, force-fitting or material-fitting manner. Here, in the case of material fitting fixation, ultrasonic welding is preferable. In this advantageous manner, the production of the stator can be significantly simplified.
In a development of the insulating body, the insulating body has an annular support ring which surrounds the longitudinal center axis at a radial distance and is fastened at the axial switch end to the coil support at a distance in a plane radial to the longitudinal center axis. At least one insulating cover is integrally formed on the carrier ring, which at least partially surrounds the winding contact ends of the stator coil, which are in direct electrical contact with one another, in an axially positive manner at the switching ends and electrically insulates these winding contact ends to the outside. The winding contact ends are formed by wire ends of the respective stator coils and are provided for interconnecting the stator coils to one another. The winding contact end differs from the phase winding contact end only in its function. The insulating carrier body then surrounds both the interconnection device and the winding contact ends of the stator coils, which are in electrical contact with one another, and eliminates additional means for insulating the winding contact ends. The insulating cover can extend radially outward or radially inward at the carrier ring. Since the carrier ring is fixed to the coil carrier, the interconnection device received by the insulator and the corresponding winding contact end of the stator coil are immovably fixed relative to the coil carrier.
In order to fix the carrier ring at a distance from the coil carrier, a plurality of holding arms can be integrally formed at the carrier ring. The holding arms each have a radial section connected to the carrier ring and extending radially outward and an axial section connected to the radial section and extending axially toward the coil carrier. The holding arm is then fixed to the coil carrier by means of the respective axial section in a form-fitting and/or material-fitting manner. The carrier ring is therefore axially supported at the coil carrier and the interconnection means accommodated by the insulator and the winding contact end of the stator coil are immovably fixed relative to the coil carrier. The electrical contacting of the stator to an external current source can thereby be significantly simplified. Preferably, the plurality of holding arms are evenly distributed in the circumferential direction at the carrier ring in order to evenly support the carrier ring at the coil carrier.
Advantageously, the first positive-fit contour can be shaped at the axial section and the second positive-fit contour can be shaped at the coil carrier, said first and second positive-fit contours engaging axially and positively with one another. Here, the first or second positive contour can be an integrally formed projection and the second or first positive contour can be a recess or a cutout complementary to the projection. In addition, the individual projections and the corresponding recesses or cutouts can also be secured to one another in a material-locking manner, so that an undesired detachment of the insulator from the coil carrier is prevented.
In an advantageous development of the stator according to the invention, the interconnection means of the stator has three elongated and preferably flat shaped contact strips which are oriented at the axial switch ends, preferably perpendicularly to the longitudinal mid axis, and which axially overlap one another at a distance from one another. The respective contact strips are in particular in pairs and in phase correspondence with the phase winding contact ends of a plurality of, in particular six, stator coils. The contact strips are expediently made of an electrically conductive material, so that the phase winding contact ends of the stator coil, which are fastened to the respective contact strips, are in electrical contact with one another via the respective contact strips. Furthermore, the phase winding contact ends of the stator coils are electrically conductively fixed to the contact strips and can be welded or soldered, for example, thereto. The contact strips are elongate and preferably flat and bridge the distance between the phase winding contact ends of the stator coils to be contacted. The electrical contacting of the phase winding contact ends of the stator coils is thereby significantly simplified. Furthermore, the contact strips overlap one another and are thus arranged at the coil carrier in a space-saving manner. The insulating carrier body at least partially surrounds the contact strips of the interconnection device in a form-fitting manner and fills the intermediate spaces between the contact strips. The individual contact strips are thereby spaced apart from one another and are fixed in the insulating body in an electrically insulated manner. Suitably, the respective contact strip projects at least partially outwards from the insulating body, in order to be able to interconnect the stator coils with each other by means of an interconnection device.
Advantageously, each contact strip can have a central overlapping section, to both sides of which receiving sections for the phase winding contact ends of the respective stator coil are connected in each case. The contact strips axially adjacent to the longitudinal center axis overlap one another in an overlap section and the phase winding contact ends of the stator coils are fixed at the receiving section. The phase winding contact ends of the stator coils are electrically conductively fixed to corresponding electrically conductive contact strips. In this way, the phase winding contact ends of the stator coil are correspondingly electrically contacted to each other via the contact strips. In addition, the one contact strip and the other contact strip are arranged at an angle to one another in the overlapping section perpendicular to the longitudinal center axis in order to be able to accommodate the phase winding contact ends of adjacent stator coils. The insulating carrier also fixes the contact strips relative to one another, so that undesired movements of the contact strips are excluded when the interconnection device is in electrical contact with the phase winding contact ends of the stator coil or also during operation of the stator.
Furthermore, the receiving sections of the individual contact strips can advantageously lie in a common receiving plane perpendicular to the longitudinal center axis. The phase winding contact ends of the stator coils can thereby be of identical design and can be brought into electrical contact with the contacts axially in the same receiving plane, thereby significantly reducing the effort required for producing the stator. For this purpose, a step section can be provided between at least one of the receiving sections and the overlapping section of the respective contact strip, which step section axially offsets the receiving section relative to the overlapping section. The individual contact strips can be produced and shaped in a stamping process.
Preferably, the upper one of the axially spaced contact strips has downwardly offset receiving sections on both sides, and the lower one of the axially spaced contact strips has upwardly offset receiving sections on both sides. The central one of the axially spaced contact strips then has no step sections on both sides. The expressions "lower", "middle" and "upper" relate here to the axial distance of the overlapping sections of the respective contact strips from the coil carrier, which increases from the "lower" to the "upper" part. Suitably, the receiving sections of the lower and upper contact strips are axially offset by the distance of the lower and upper contact strips, respectively, from the middle contact strip, so that the axial distance is compensated. The central contact strip and the receiving sections of the lower and upper contact strips then lie in a common receiving plane and the phase winding contact ends of the stator coil can be brought into electrically conductive contact with the contact strips with reduced effort. For this purpose, the receiving section of the respective contact strip suitably projects from the insulating body.
The respective phase winding contact end can be fixed in the receiving section by material fit, preferably by ultrasonic welding, at the respective contact strip. In order to be able to fix the respective phase winding contact end in the receiving section over a large area, the receiving section of the respective contact strip can have axially oriented coupling projections. The respective axially oriented phase winding contact ends, i.e. the wire ends, of the respective stator coils are fixed in large-area contact with the respective coupling projections. Advantageously, the respective phase winding contact ends of the stator coil can thereby be brought into electrical contact with the respective contacts reliably and with reduced effort.
In order to be able to correspondingly connect the contact strips to an external current source, axially oriented phase terminal pins can be integrally formed on the respective contact strips, facing away from the coil carrier. Alternatively, the individual phase connection pins can also be fixed to the contact strips by material fit, preferably by resistance welding. The respective contact strips can be made of copper, for example, in order to achieve a material-locking fixing of the phase winding contact ends in the receiving sections by ultrasonic welding. For example, the individual integrally formed or also material-fittingly fixed phase connection pins can be coated with a nickel-tin layer in order to simplify the material-fittingly fixing of the phase connection pins by soldering at the phase connections of the external current source.
The stator coils can advantageously be interconnected in a first star circuit with three first phase terminals and in a second star circuit parallel to the first star circuit with three second phase terminals. Subsequently, each first phase terminal and each second phase terminal are formed by the phase winding contact end portion of the corresponding stator coil. The contact strips of the interconnection device and the phase winding contact ends of the individual stator coils are in electrical contact with one another in a corresponding manner. Alternatively to a parallel star circuit, the stator coils can advantageously be interconnected in a delta circuit with three phase terminals. The respective phase terminals are formed by the phase winding contact ends of the respective stator coils and are correspondingly electrically contacted to each other via the contact strips.
In an advantageous development of the stator according to the invention, the stator has a housing with a housing wall surrounding the longitudinal center axis and a housing base axially closing the housing wall. The coil carrier is fixed in the housing coaxially and in a rotationally fixed manner by means of a fixing device. The fastening device has a first fastening contour and a second fastening contour. The first fixing contour here comprises a plurality of fixing projections which project radially inward from the housing wall and are arranged distributed in the circumferential direction only in the region of the housing base. The second fastening contour comprises a plurality of fastening recesses oriented radially inward, which are shaped at the coil carrier body towards the housing wall. The fixing projection is complementarily shaped with respect to the fixing recess and radially engages with the fixing recess.
The fastening projections are arranged only in the region of the housing base and project from the housing base in the axial direction and from the housing wall in the radial direction by a few millimeters to a few centimeters. The fixing projections can be integrally formed at the housing wall or at the housing bottom or both. Furthermore, the fastening projections are arranged distributed over the circumference of the housing base such that the coil carrier engages the housing over its entire circumference. Advantageously, the fastening recesses and the fastening projections are also distributed uniformly in the circumferential direction, so that the torque acting on the coil carrier is transmitted uniformly to the plurality of fastening projections engaging with the fastening recesses.
An inner circumferential gap can advantageously be formed between the respective fixing recess and the fixing projection which engages with the fixing recess accordingly. The circumferential gap can simplify the arrangement of the coil carrier in the housing and can compensate for manufacturing tolerances. Preferably, the surrounding gap has a width of 75 μm to 125 μm.
In an advantageous embodiment, the coil carrier can have a plurality of individual segments which each carry a stator coil, said plurality of individual segments being arranged distributed in the circumferential direction around the longitudinal central axis. Each body section has an electrically insulating support and an electrically conductive conductor core component, which is at least partially surrounded by the insulating support. The insulating carrier has a surrounding plate with a routing protrusion protruding radially inward from the surrounding plate. The winding projections are integrally formed at the surrounding plate and the respective stator coils are wound at the winding projections. The body sections of the coil carrier are expediently of identical design, in order to reduce the manufacturing effort. If the coil carrier, as described above, has an electrically insulating carrier block and an electrically conductive conductor core block, the individual insulating carriers suitably form the insulating carrier block of the coil carrier and the conductor core components form the conductor core blocks of the coil carrier.
The respective fixing recess can advantageously be formed by two half recesses at the contact points of adjacent body sections. The respective half-recesses are formed here in each case toward one another at the adjacent body sections. The number of fastening recesses in the coil carrier is then determined by the number of body sections of the coil carrier. The number of fastening projections at the housing then corresponds, as appropriate, to the number of body sections in the coil carrier. Advantageously, the recess halves can be shaped in the surrounding plate of the respective insulating carrier and extend axially groove-like over the entire height of the surrounding plate. Thus, radial semi-bulges in each conductor core part can be shaped, which axially extend over the entire height of the respective conductor core part. The half-projections of the conductor core part can then engage radially inwardly into the half-recesses of the surrounding plate and close the fixing recesses axially over the entire height of the respective conductor core part. The conductor core parts of adjacent body sections then lie against one another over the entire height.
Furthermore, the half-elevations of the individual conductor core parts can be axially adjacent to the respective fixing elevations in the respective fixing recesses. Each fixing recess then partially radially engages with the corresponding fixing projection and partially radially engages with the half projection of the corresponding conductor core member. Suitably then, the half-bulges of the conductor core part only partially close the half-recesses of the insulating carrier and the respective fixing recesses remain axially open on one or both sides. In order to stabilize the coil carrier, the half-projections of the respective conductor core parts of adjacent body sections can be positively engaged in the circumferential direction over the entire height of the conductor core parts via the axial grooves and the complementary axial projections. The adjacent body sections can be secured to one another in a material-fit manner, preferably by ultrasonic welding, at the semi-elevations of the respective conductor core parts and thus form a one-piece coil carrier.
In a development of the coil carrier, the individual insulating carriers can be made of plastic and injection-molded on the respective conductor core part in a plastic injection molding process. Suitably, the plastic is electrically insulating, such that the insulating carrier is electrically insulating. Alternatively, the respective insulating carrier part can be formed in two parts and at least partially surround the respective conductor core part axially on both sides and in a form-fitting manner. The two-part insulating carrier can be produced, for example, from a non-conductive plastic by plastic injection molding.
The coil carrier can advantageously have at least one cutout which is oriented radially outward and in which a winding contact end or a phase winding contact end of the respective stator coil is fixed at least in some regions in a form-fitting manner. In this case, the respective winding contact end or the respective phase winding contact end is formed by a wire end of the wound stator coil, wherein the winding contact end differs from the phase winding contact end only in its function. In addition, the respective winding contact end or the respective phase winding contact end can also be secured in the cutout in a material-locking manner. The cutout is oriented outward and extends axially at the coil carrier. In this way, the respective winding contact end or the respective phase winding contact end of the stator coil can be axially aligned at the axial switch end of the coil carrier. In particular, the electrical contacting of the stator coil with the contact strips of the interconnection device can thereby be simplified.
Further important features and advantages of the invention emerge from the dependent claims, the figures and the associated description of the figures in accordance with the figures.
It is to be understood that the features mentioned above and those yet to be explained below can be used not only in the respectively given combination, but also in other combinations or alone without departing from the scope of the present invention.
Drawings
Preferred embodiments of the invention are illustrated in the figures and are set forth in detail in the following description, wherein like reference numerals refer to identical or similar or functionally identical components.
Are respectively schematically shown
Fig. 1 is a view of a stator according to the invention with a coil carrier and an insulator;
fig. 2 is a view of the coil carrier in the housing shown in fig. 1;
fig. 3 and 4 are sectional views of the coil carrier with the fixing device shown in fig. 2;
fig. 5 is an enlarged sectional view of a fixing device of the stator shown in fig. 1;
fig. 6 and 7 are views of the coil carrier of the stator shown in fig. 1;
fig. 8 and 9 are views of the insulated carrier of the coil carrier shown in fig. 6 and 7 or a portion thereof;
FIG. 10 is a view of an interconnect device having a contact strip, the interconnect device being partially surrounded by an insulator;
FIGS. 11 and 12 are views of the interconnect device shown in FIG. 10 with contact strips;
FIGS. 13-15 are views of a contact strip of the interconnect shown in FIGS. 10-12;
FIGS. 16 and 17 are views of the insulator of the stator shown in FIG. 1 with the interconnecting interconnection means surrounding;
FIG. 18 is a schematic illustration of a possible interconnection of stator coils in the stator shown in FIG. 1;
fig. 19 is a view of the stator shown in fig. 1 with stator coils interconnected according to the interconnections of fig. 18.
Detailed Description
Fig. 1 shows a view of a stator 1 according to the invention with a hollow-cylindrical coil carrier 2. The coil carrier 2 is composed of a plurality of body sections 4 which are arranged distributed around a longitudinal center axis 3 of the coil carrier 2, as explained in detail below with reference to fig. 6 to 9. Each body section 4 has an electrically insulating carrier 5 and an electrically conductive conductor core component 6, which is at least partially surrounded by the insulating carrier 5. The insulating carrier 5 has a surrounding plate 7 with winding projections 8 which project radially inwards from the surrounding plate 7. Stator coils 9 are wound on the respective winding overhang 8, which are oriented parallel to the longitudinal center axis 3 within the coil carrier 2 and are arranged distributed around it. Each coil protrusion 8 forms an integral part of each insulating carrier 5 and electrically insulates each wound stator coil 9 from the conductor core component 6. The individual coil projections 8 and the stator coils 9 wound thereon in each case together form stator teeth of the stator 1 which project radially inward. A total of twelve individual segments 4 of the coil carrier 2 are of identical design.
Six of the adjacently arranged stator coils 9 each have a phase winding contact end 11a of one of the three phases U, V, W at the axial switching end 10 of the coil carrier 2. The phase winding contact ends 11a are formed by the wire ends of the wound stator coil 9 and are electrically contacted to one another in a phase-corresponding manner by means of an interconnection device 12. For this purpose, the interconnection means 12 has three flat and elongate shaped contact strips 13, as explained in more detail below with reference to fig. 10 to 15. The contact strips 13 are oriented at the axial switching end 10 perpendicularly to the longitudinal center axis 3 and overlap one another at an axial distance. Furthermore, at the contact strip 13, three phase connection pins 14 for the individual phases U, V, W are integrally formed or fixed in a material-fitting manner, to which phase connection pins an external current source can be connected. In this embodiment the stator 1 has a single end contact unit with six phase winding contact ends 11a and a single interconnection arrangement 12 with three contact strips 13.
Furthermore, the stator 1 has an electrically insulating insulator 15 which surrounds the interconnection device 12 in a partially form-fitting manner and electrically insulates the contact ends 11a of the stator coils 9, which are in electrical contact with one another via the interconnection device 12, from one another in a corresponding manner. The contact strips 13 and the phase connection pins 14 here project partially from the insulating body 15 in order to interconnect the stator coils 9 to one another by means of the interconnection means 12 and to be able to be connected to an external current source. The insulating body 15 has a carrier ring 16 radially surrounding the longitudinal center axis 3 and a plurality of retaining arms 17, as will be explained in more detail below with reference to fig. 16 and 17. The interconnection means 12 with the contact strip 13 is here received by a carrier ring 16. The first positive fit contour 18a is formed at the retaining arm 17 and the second positive fit contour 18b, by means of which the carrier ring 16 is fixed at the coil carrier 2 in a spaced-apart and positive fit, is formed at the coil carrier. Furthermore, the insulating body 15 has two insulating covers 19 which receive the winding contact ends 11b of the stator coils 9 in electrical contact with one another in a form-fitting manner and are electrically insulated to the outside.
Fig. 2 shows a view of the coil carrier 2 in the housing 20 of the stator 2. The pot-shaped housing 20 has a housing wall 21 surrounding the longitudinal center axis 3 and a housing bottom 22 axially closing the housing wall 21. The coil carrier 2 is arranged coaxially in the housing 20 and is fixed in a rotationally fixed manner. The housing base 22 is arranged axially opposite the axial switch end 10 of the coil carrier 2 and is integrally formed on the housing wall 21. A receiving opening 23 for receiving the rotor shaft is also formed at the housing bottom 22, which opening is coaxial with the longitudinal center axis 3.
Fig. 3 and 4 show a sectional view of the stator 1 at the housing base 22. For rotationally fixing the coil carrier 2 in the housing 20, the stator 2 has a fixing device 24 having a first fixing contour 25a and a second fixing contour 25 b. The first fastening contour 25a here comprises a plurality of fastening projections 26a which project radially inward from the housing wall 21 and are integrally formed only in the region of the housing base 22 at the housing wall 21 and at the housing base 22. The second fastening contour 25b comprises a plurality of fastening recesses 26b oriented radially inward, which are shaped at the coil carrier 2 toward the housing wall 21. The fixing projection 26a is complementarily shaped to the fixing recess 26b and radially engages therewith. The fastening projections 26a and the fastening recesses 26b are arranged so as to be distributed uniformly in the circumferential direction and in this case the coil carrier 2 engages the housing 20 over its entire circumference. The torque acting on the coil carrier 2 can thereby be absorbed uniformly.
Fig. 5 shows a sectional view of one fixing projection 26a and one fixing recess 26b of the fixing device 24. An inner circumferential gap 27, which preferably has a width of 75 μm to 125 μm, is formed between the fixing recess 26b and the fixing projection 26a engaging with the fixing recess 26 b. The circumferential gap 27 can simplify the arrangement of the coil carrier 2 in the housing 20 and can compensate for manufacturing tolerances. As is also shown in fig. 3 and 4, the securing device 24 can prevent the coil carrier 2 from rotating clockwise and counterclockwise in the circumferential direction.
According to fig. 3 to 5, the fastening recesses 26b are each formed by two half-recesses 29 at the contact points 28 of adjacent body segments 4. The half-recesses 29 are shaped in the insulating carrier 5 of the adjacent body section 4 and are arranged facing one another. The number of fastening recesses 26b in the coil carrier 2 is therefore determined by the number of body sections 4 or contact points 28 of the coil carrier 2. The number of fastening projections 26a at the housing 20 corresponds, as appropriate, to the number of body sections 4 in the coil carrier 2.
Fig. 6 and 7 show views of the coil carrier 2 in the stator 1 according to the invention from the side of the switch end 10 facing the axial direction. The coil carrier 2 has body sections 4 which are arranged distributed in the circumferential direction around the longitudinal center axis 3 and which abut one another at contact points 28. Each individual segment 4 comprises an insulating carrier 5 and to a conductor core component 6 which is partially surrounded by the insulating carrier 5. A winding overhang 8 for a stator coil 9, not shown here, is integrally formed on the wraparound plate 7 of the insulating carrier 5, said winding overhang projecting radially inward from the wraparound plate 7.
The respective contact points 28 of adjacent body segments 4 are each provided with a fastening recess 26b of the fastening device 24. The fastening recesses 26b are formed by adjacent mutually facing half-recesses 29 in the circumferential plates 7 of adjacent insulating carriers 5 and extend in an axial groove-like manner over the entire height of the respective circumferential plate 7. The conductor core parts 6 adjacent to one another have radial projections 30 which extend axially over the entire height of the respective conductor core part 6. The half-protrusions 30 of the respective conductor core parts 6 engage radially inwardly into the half-recesses 29 of the respective insulating carriers 5 and form fixing projections 26c, respectively. The fixing projections 26c axially close the respective fixing recesses 26b formed by the half recesses 29 over the entire height of the respective conductor core parts 6. According to fig. 1, the height of the conductor core part 6 is smaller than the height of the insulating carrier 5, so that the respective fixing recess 26b remains open on both sides. Subsequently, the respective fastening projections 26a at the housing base 22 engage in the fastening recesses 26b in the region of the housing base 22 and are arranged axially adjacent to the respective fastening projections 26c in the respective fastening recesses 26 b.
The half-protrusion 30 of each conductor core part 6 of the adjacent body section 4 also has an axial protrusion 31a and a complementary axial groove 31 b. The axial projections 31a engage in the axial grooves 31b over the entire height of the conductor core part 6 in the circumferential direction and fix the adjacent body sections 4 radially to one another. Adjacent body sections 4 can be fixed to each other at the half-bulges 30 of the respective conductor core parts 6 by ultrasonic welding. The axial grooves 32 in the individual conductor core parts 6 serve here not only for simplified handling of the conductor core parts 6 during the production of the stator 1, but also for additional positive fixing of the coil carrier 2 in the housing 20.
Furthermore, a second positive-locking contour 18b, which in this exemplary embodiment comprises a plurality of recesses 33b, is formed in each body section 4. According to fig. 1, the first positive-fit contour 18a of the insulator 15 axially engages with some of the recesses 33b of the second positive-fit contour 18 b. In this way, the insulating body 15 is fixed to the coil carrier 2 in a form-fitting manner. Furthermore, each body section 4 of the coil carrier 2 has a cutout 34, which is oriented radially outward and extends axially. According to fig. 1, the phase winding contact ends 11a or the winding contact ends 11b of the respective stator coil 9 are fixed in the respective cutouts 34 in a partially positive and/or material-fitting manner. The individual phase winding contact ends 11a and the respective winding contact ends 11b are oriented axially through the cutouts 34 of the coil carrier 2 toward the axial switch end 10 and can be simply brought into electrical contact with one another.
Fig. 8 shows a view of the insulating carrier 5 from the side of the switch end 10 facing the axial direction and fig. 9 shows one axial component of the insulating carrier 5. The insulating carrier 5 can be produced, for example, from an electrically insulating plastic in a plastic injection molding method. Subsequently, the axial component of the insulating carrier 5 comprises conductor core components 6 axially on both sides, thereby forming the body section 4 of the coil carrier 2. As already explained with reference to fig. 6 and 7, the insulating carrier 6 has a recess 33b and a cutout 34 of the second positive-locking contour 18 b. The two half recesses 29 form, with the adjacent half recess 29 of the insulating carrier 5, on both sides a fixing recess 26b in the coil carrier 2. According to fig. 1, one of the stator coils 9 of the stator 1 is wound at a winding boss 8 protruding radially inward from the surrounding plate 7.
Fig. 10 shows a view of the interconnection means 12 with the contact strip 13, which is partially surrounded by an insulator 15. A view of the interconnect 12 is shown in fig. 11 and 12. Fig. 13 to 15 show views of the contact strip 13. The contact strips 13 are flat and elongate and bridge the distance between the phase winding contact ends 11a of the stator coil 9 to be contacted according to fig. 10. Suitably, the contact strip 13 consists of an electrically conductive material, for example copper, and the phase winding contact end 11a is fixed electrically conductively at the contact strip 13.
According to fig. 11 and 12, the contact strip 13 has a central overlapping section 35, to the two sides of which receiving sections 36 are connected. In the overlap section 35, the contact strips 13 which are axially adjacent to the longitudinal center axis 3 overlap one another and can fix the phase winding contact ends 11a of the stator coil 9 to the receiving section 26. The contact strips 13 are arranged in the overlap section 35 at an angle α to one another perpendicular to the longitudinal mid-axis 3 in order to accommodate the phase winding contact ends 11a of adjacent stator coils 9.
The receiving sections 36 of the contact strips 13 lie in receiving planes 37 which are jointly perpendicular to the longitudinal mid axis 3. For this purpose, step sections 38 are formed between the receiving section 36 and the respective overlapping sections 35 at the upper contact strip 13a and the lower contact strip 13c, respectively. The central contact strip 13b has no step sections 38 and is located in the receiving plane 37. The corresponding step portion 38 axially offsets the connected receiving portion 36 relative to the longitudinal center axis 3, so that at least the receiving portion 36 that contacts the belt 13 lies in the receiving plane 37. In contrast, the overlapping sections 35 remain axially offset from one another, so that the contact strips 13 do not have direct contact with one another. According to fig. 10, the interconnection means 12 with the contact strips 13 is partially surrounded by an insulator 15, so that the contact strips 13 are separated and electrically insulated from each other in the insulator 15 by the electrically insulating material of the insulator 15.
The contact strips 13 each have an axially oriented coupling projection 39 in the receiving section 36. The coupling projections 39 are formed from the material of the contact strip 13 and are arranged facing away from the coil carrier 2, as shown in fig. 10. A receptacle 40 is formed around the coupling projection 39 in the receptacle section 36, in which the respective phase winding contact end 11a is radially received and is arranged to bear against the coupling projection 29. The respective phase winding contact end 11a is fixed to the coupling projection 39 in a material-fitting manner, preferably by ultrasonic welding. Furthermore, axially oriented phase connection pins 14 are fastened to the respective contact strips 13 in a material-fitting manner, preferably by resistance welding, away from the coil carrier 2. The respective contact strips 13 can be made of copper, for example, and the respective phase connection pins 14 are coated with a nickel-tin layer.
Fig. 13 shows a view of the upper contact strip 13a, fig. 14 shows a view of the middle contact strip 13b and fig. 15 shows a view of the lower contact strip 13 c. As explained with reference to fig. 10 to 12, the upper contact strip 13a and the lower contact strip 13c each have an overlapping section 35, a receiving section 36 and a step section 38. In contrast, the central contact strip 13b does not have a step section 38, and the overlap section 35 enters directly into the receiving section 37 on both sides. The intermediate contact strips 13a, 13b and 13c can be produced, for example, by stamping. Coupling projections 39 and receptacles 40 for receiving and for fixing the respective phase winding contact ends 11a are formed in the receiving sections 36. The phase connection pins 14 are each secured to the respective phase connection strip 13 in a material-to-material manner, and an external current source can be connected to said phase connection pins.
Fig. 16 shows a view of the insulating body 15 in the stator 1 and fig. 17 shows the insulating body 15 arranged at the coil carrier 2. The insulating body 15 here partially surrounds the interconnection device 12 with the contact strips 13 and supports the axially spaced apart contact strips 13 against one another. Suitably, the receiving section 36 of the phase U, V, W and the phase terminal pin 14 protrude from the insulator 15 so that the phase winding contact end 11a can be electrically contacted with the interconnection means 12 and the stator 1 can be connected to an external current source. Furthermore, the insulating body 15 has an insulating cover 19 which insulates the winding contact ends 11b of the stator coils 9, which are in electrical contact with one another, from the outside according to fig. 17. The insulating cover 19 is integrally formed on the carrier ring 16 and is oriented radially outward.
The carrier rings 16 of the insulating body 15 are fixed at a distance to the coil carrier 2. For this purpose, the retaining arms 17 are integrally formed at the carrier ring 16. The retaining arms 17 each have a radial section 41 and an axial section 42. The radial section 41 is directly connected to the carrier ring 16 and is oriented radially outward. The axial section 42 is directly connected to the radial section 41 and extends axially towards the coil carrier 2. A first positive-fit contour 18a in the form of a projection 33a is formed at the axial section 42 of the respective retaining arm 17, as shown in fig. 16. The protrusions 33a of the first positive-fit contour 18a axially engage with the recesses 33b of the second positive-fit contour 18b of the coil carrier 2 according to fig. 17. Additionally, the projection 33a can be secured in the recess 33b in a material-locking manner. The insulating body 15 has a total of four retaining arms 16, which are distributed uniformly in the circumferential direction on the carrier ring 16.
Fig. 18 shows a schematic illustration of a possible interconnection of the stator coils 9 in the stator 1. Fig. 19 shows a corresponding view of the interconnected stator coils 9 in the stator 1. The stator coils 9 are interconnected into a first star circuit 43 having three first phase terminals 43U, 43V, 43W and a second star circuit 44 parallel to the first star circuit 43 having three second phase terminals 44U, 44V, 44W. Each of the first phase terminals 43U, 43V, and 43W and each of the second phase terminals 44U, 44V, and 44W are formed by the phase winding contact end portion 11a of the corresponding stator coil 9 according to fig. 19. Here, the contact strips 13 of the interconnection device 12 contact the phase winding contact ends 11a of the six stator coils 9 and thereby electrically contact the phase terminals 43U, 43V, 43W and 44U, 44V, 44W in pairs and in phase correspondence with one another. The two star circuits 43 and 44 each have a neutral point 43N and 44N, respectively, in which the three winding contact ends 11b of the stator coil 9 are in electrical contact with each other. The winding contact ends 11b in the neutral points 43N and 44N can be welded or soldered to one another and are electrically insulated to the outside by the insulating cover 19 of the insulator 15 according to fig. 19.
Claims (30)
1. A stator (1) for a three-phase electric motor,
-wherein the stator (1) has a hollow-cylindrical coil carrier (2) and a plurality of stator coils (9) which are respectively wound on winding projections (8) of the coil carrier (2) and which are oriented parallel to a longitudinal center axis (3) of the coil carrier (2) and are arranged distributed around the longitudinal center axis (3) within the coil carrier (2),
-wherein the wire ends of the respective stator coils (9) form phase winding contact ends (11a) for contacting the stator coils (9) with three phases (U, V, W) or form winding contact ends (11b) for interconnecting the stator coils (9) to each other,
-wherein at least one end contact unit is formed at an axial switching end (10) of the coil carrier (2), which comprises the phase winding contact ends (11a) for three phases (U, V, W) of a plurality of stator coils (9) of the stator (1), and
-wherein each of said phase winding contact ends (11a) of said stator coils (9) in said end contact unit is correspondingly electrically contacted by means of an interconnection means (12),
it is characterized in that the preparation method is characterized in that,
-the stator (1) has an electrically insulating insulator (15) which surrounds the interconnection means (12) at least in sections with a form fit and electrically insulates the phase winding contact ends (11a) which are in electrical contact with one another via the interconnection means (12) from one another in a corresponding manner.
2. The stator as set forth in claim 1, wherein,
it is characterized in that the preparation method is characterized in that,
the insulating body (15) is made of plastic and is extruded around the interconnection device (12) by means of a plastic injection molding method.
3. The stator according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the insulating body (15) has an annular support ring (16) which surrounds the longitudinal center axis (3) in a radially spaced manner and is fastened at the axial switching end (10) to the coil carrier (2) in a plane which is radial to the longitudinal center axis (3) in a spaced manner.
4. The stator as set forth in claim 3,
it is characterized in that the preparation method is characterized in that,
at least one insulating cover (19) is integrally formed on the carrier ring (16), said cover surrounding at least some winding contact ends (11b) of the stator coils (9) that are in direct electrical contact with one another at the axial switching ends (10) in an at least partially form-fitting manner and electrically insulating said contact ends towards the outside.
5. The stator according to claim 3 or 4,
it is characterized in that the preparation method is characterized in that,
-integrally forming a plurality of retaining arms (17) at the carrier ring (16), each having a radial section (41) connected to the carrier ring (16) extending radially outwards and an axial section (42) connected to the radial section (41) extending axially towards the coil carrier (2), and
-the retaining arm (17) is fixed to the coil carrier (2) by means of the respective axial section (42) in a form-fitting and/or material-fitting manner.
6. The stator as set forth in claim 5, wherein,
it is characterized in that the preparation method is characterized in that,
-a first positive-fit contour (18a) is shaped at the axial section (42) and a second positive-fit contour (18b) is shaped at the coil carrier (2), the first and second positive-fit contours being in axial and positive-fit engagement with each other, and
-the first or second positive contour (18a, 18b) is an integrally formed protrusion (33a) and the second or first positive contour (18a, 18b) is a recess (33b) or cut-out complementary to the protrusion (33 a).
7. The stator according to claim 5 or 6,
it is characterized in that the preparation method is characterized in that,
the plurality of holding arms (17) are evenly distributed at the carrier ring in the circumferential direction.
8. The stator according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
-the interconnection device (12) has three elongate, shaped contact strips (13) which are oriented at the axial switching end (10), preferably perpendicularly to the longitudinal mid-axis (3), and overlap axially at a distance from one another, and
-each of said contact strips (13) is in electrical contact with said phase winding contact ends (11a) of a plurality, in particular six, of stator coils (9), in particular in pairs and in phase correspondence with each other.
9. The stator as set forth in claim 8,
it is characterized in that the preparation method is characterized in that,
-each of the contact strips (13) has a central overlapping section (35) at which receiving sections (36) of the phase winding contact ends (11a) of the stator coils (9) are connected on both sides, and
-one of the contact strips (13) and the other contact strip (13) are arranged in the overlapping section (35) at an angle (a) relative to each other perpendicular to the longitudinal mid-axis (3).
10. The stator as set forth in claim 9, wherein,
it is characterized in that the preparation method is characterized in that,
the receiving sections (36) of the respective contact strips (13) are located in a common receiving plane (37) perpendicular to the longitudinal center axis (3).
11. The stator according to claim 9 or 10,
it is characterized in that the preparation method is characterized in that,
a step section (38) is provided between at least one of the receiving sections (36) and the overlapping section (35) of the respective contact strip (13), said step section axially offsetting the receiving section (36) relative to the overlapping section (35).
12. The stator as set forth in claim 11, wherein,
it is characterized in that the preparation method is characterized in that,
-an upper one (13a) of the axially spaced apart contact strips has downwardly offset receiving sections (36) on both sides and a lower one (13c) of the axially spaced apart contact strips has upwardly offset receiving sections (36) on both sides, and
-the middle one (13b) of the axially spaced contact strips has no step sections (38) on both sides.
13. The stator according to any one of claims 9 to 12,
it is characterized in that the preparation method is characterized in that,
the respective phase winding contact end (11a) is secured in the receiving section (36) to the respective contact strip (13) by material bonding, preferably by ultrasonic welding.
14. The stator as set forth in claim 13, wherein,
it is characterized in that the preparation method is characterized in that,
the receiving section (36) of each contact strip (13) has at least one axially oriented coupling projection (39) against which the respective axially oriented phase winding contact end (11a) of each stator coil (9) bears over a large area.
15. The stator according to any one of claims 8 to 14,
it is characterized in that the preparation method is characterized in that,
the axially oriented phase connection pins (14) are integrally formed away from the coil carrier (2) or are fastened to the respective contact strips (13) by means of a material fit, preferably by means of resistance welding.
16. The stator according to any one of claims 8 to 15,
it is characterized in that the preparation method is characterized in that,
-the stator coils (9) are interconnected in a first star circuit (43) with three first phase terminals (43U, 43V, 43W) and a second star circuit (44) parallel to the first star circuit (43) with three second phase terminals (44U, 44V, 44W),
-each of the first phase terminals (43U, 43V, 43W) and each of the second phase terminals (44U, 44V, 44W) is formed by the phase winding contact end portion (11a) of the corresponding stator coil (9), and
-the contact strip (13) and the phase winding contact end (11a) of the respective stator coil (9) are in electrical contact with each other in correspondence.
17. The stator according to any one of claims 8 to 15,
it is characterized in that the preparation method is characterized in that,
-the stator coils (9) are interconnected in a triangular circuit with three phase terminals,
-each of the phase terminals is formed by the phase winding contact end (11a) of the corresponding stator coil (9), and
-the contact strip (13) and the phase winding contact end (11a) of the respective stator coil (9) are in electrical contact with each other in correspondence.
18. The stator according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the stator (1) has a housing (20) having a housing wall (21) surrounding the longitudinal mid-axis (3) and having a housing bottom (22) axially closing the housing wall (21),
-the coil carrier (2) is fixed coaxially and by means of a fixing device (24) having a first fixing profile (25a) and a second fixing profile (25b) in the housing (20),
-the first fixing contour (25a) comprises a plurality of fixing projections (26a) projecting radially inwards from the housing wall (21), which are arranged distributed in the circumferential direction only in the region of the housing bottom (22),
-the second fixing contour (25b) comprises a plurality of radially inwardly directed fixing recesses (26b) which are shaped at the coil carrier (2) towards the housing wall (21) and which are shaped
-said fixing projection (26a) is complementarily shaped and radially engaged with said fixing recess (26 b).
19. The stator as set forth in claim 18, wherein,
it is characterized in that the preparation method is characterized in that,
an inner circumferential gap (27) is formed between each of the fastening recesses (26b) and the fastening projection (26a) which engages in each case with the fastening recess (26b), said circumferential gap preferably having a width of 75 μm to 125 μm.
20. The stator according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
-the coil carrier (2) has a plurality of body sections (4) which each carry a stator coil (9), which are arranged distributed in the circumferential direction around the longitudinal central axis (3), and
-each of said body segments (4) having: an electrically insulating part (5) having a wraparound plate (7) and having winding projections (8) directed radially inwardly from the wraparound plate (7) for the respective stator coils (9); and an electrically conductive conductor core component (6) at least partially surrounded by the insulating carrier (5).
21. The stator according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
-the coil carrier (2) has an electrically insulating carrier block and an electrically conductive conductor core block, and
-the plurality of winding overhangs (8) of the coil carrier (2) are formed by the conductor blocks and by the insulating carrier blocks encasing the conductor core blocks, such that the stator coil (9) wound on each winding overhang (8) is electrically insulated from the conductor core blocks by the insulating carrier blocks.
22. The stator as set forth in claim 21, wherein,
it is characterized in that the preparation method is characterized in that,
-the insulating carrier block and the insulator (15) of the coil carrier (2) are formed of plastic, and
-the insulating body (15) is fixed to the insulating carrier block of the coil carrier (2) in a form-fitting, force-fitting or material-fitting manner.
23. The stator as claimed in claim 20 and 21,
it is characterized in that the preparation method is characterized in that,
each insulating carrier (5) forms the insulating carrier block of the coil carrier (2) and the conductor core parts (6) form the conductor core blocks of the coil carrier (2).
24. The stator as claimed in claims 18 and 20,
it is characterized in that the preparation method is characterized in that,
the body sections (4) are arranged in the housing (20) so as to be distributed in the circumferential direction around the longitudinal center axis (3), and the respective fastening recesses (26b) are each formed at the contact points (28) of adjacent body sections (4) by two half-recesses (29) which are each formed toward one another at adjacent body sections (4).
25. The stator as set forth in claim 24, wherein,
it is characterized in that the preparation method is characterized in that,
-the half-recesses (29) are shaped in the surrounding plate (7) of the respective insulating carrier (5) and extend axially groove-like over the entire height of the surrounding plate (7),
-shaping a semi-bulge (30) radially in each conductor core part (6), which semi-bulge extends axially over the entire height of the respective conductor core part (6), and
-the half-projections (30) of the conductor core part (6) engage radially into the half-recesses (29) of the surrounding plate (7) and close the fixing recesses (26b) axially over the entire height of the respective conductor core part (6).
26. The stator as set forth in claim 25, wherein,
it is characterized in that the preparation method is characterized in that,
the half-protrusion (30) of each conductor core part (6) is axially adjacent to the corresponding fixing protrusion (26a) in each fixing recess (26 b).
27. The stator according to claim 25 or 26,
it is characterized in that the preparation method is characterized in that,
the half-projections (30) of the individual conductor core parts (6) of adjacent body sections (4) are joined in a material-fit manner in the circumferential direction over the entire height of the conductor core part (6) via axial projections (31a) and complementary axial grooves (31 b).
28. The stator according to any one of claims 25 to 27,
it is characterized in that the preparation method is characterized in that,
the adjacent body sections (4) are fixed to one another in a material-fit manner, preferably by ultrasonic welding, on the half-elevations (30) of the respective conductor core part (6).
29. The stator according to any one of claims 20 to 28,
it is characterized in that the preparation method is characterized in that,
-each insulating carrier (5) is composed of plastic and is injection-molded at the respective conductor core part (6) in a plastic injection-molding process, or
-each insulating carrier (5) is formed in two parts and surrounds the respective conductor core part (6) at least partially axially on both sides and in a form-fitting manner.
30. The stator according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the coil carrier (2) has at least one cutout (34) oriented radially outward, in which a phase winding contact end (11a) or a winding contact end (11b) of each stator coil (9) is respectively fixed in an at least partially form-fitting manner.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019205121.9A DE102019205121A1 (en) | 2019-04-10 | 2019-04-10 | Stator for a three-phase electric motor |
| DE102019205121.9 | 2019-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111817471A true CN111817471A (en) | 2020-10-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010281344.XA Pending CN111817471A (en) | 2019-04-10 | 2020-04-10 | Stator for three-phase electric motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111817471A (en) |
| DE (1) | DE102019205121A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020132144A1 (en) * | 2020-12-03 | 2022-06-09 | Bühler Motor GmbH | Electric motor stator and method of manufacturing same |
| DE102022115852A1 (en) * | 2022-06-24 | 2024-01-04 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Switching disk for contacting windings with a circuit board |
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| DE102019205121A1 (en) | 2020-10-15 |
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