• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Insulating profile (220) for a winding slot (210) of a package of magneto-conductive sheets (154, 202) of an electric motor. The insulating profile is made of an electro-insulating synthetic material and its dimensions, within the predefined manufacturing tolerances, correspond to the associated dimensions of the winding notch (210). The insulating profile (220) has a continuous longitudinal aperture (222) for receiving the coil segment at least in segments, and its length (254) is greater than the height (214) of the magneto-conductive sheet package (202).
    公开号:FR3038156A1
    申请号:FR1656006
    申请日:2016-06-28
    公开日:2016-12-30
    发明作者:Ralf Weber；Ortwin Elsaesser；Rainer Silberer；Joerg Maute；Peter Stierle；Peter Nadig
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to an insulating profile for electrically isolating at least one winding notch of a package of magnetoconductive plates of an electric motor, the winding notch receiving at least one less in segments a coil segment of a winding associated with the electric motor. The invention also relates to an electric motor comprising at least one package of magneto-conductive sheets having at least one winding notch for receiving at least in segments a winding segment of a winding associated with the electric motor and an insulating profile for electrically isolating at least one winding notch. STATE OF THE ART According to the state of the art, sheet metal packets are known for stators and electric motor rotors. Such a lamina consists of a large number of lamellae or fried soft iron and is in a segmented or unsegmented form with teeth oriented generally in the radial direction towards the inside or towards the inside. outside and which are occupied by segments of coils of the stator winding or rotor. In order to guarantee the reliability of the electrical insulation of the laminations with respect to the winding segments, it is furthermore known to place insulating paper between the coil segments and the teeth, that is to say pieces of insulating paper in the winding slots, between the adjacent teeth.
    [0002] DESCRIPTION AND ADVANTAGES OF THE INVENTION The subject of the present invention is an insulating profile for the electrical insulation of at least one winding notch of a package of magnetoconductive sheets of an electric motor, the winding notch receiving at least in segments a coil segment of a winding associated with the electric motor, said insulating section being characterized in that it is made of an electro-insulating synthetic material and has dimensions which, within pre-defined manufacturing tolerances, correspond to the associated dimensions of the winding notch, the insulating profile having a continuous longitudinal opening to receive at least in segments, the coil segment and the iso-profile has a length greater than the height of the package of magneto-conductive sheets. Thus the invention realizes a new insulation winding notches in the form of insulating profiles respecting all the required isolation gaps 5 as well as air circulation paths and crawling paths. In addition, the insulating profiles are also economically manufactured as identical parts having a relatively simple geometry; these insulating profiles are inexpensively mounted. This eliminates complex tools to coat the package of sheets.
    [0003] The insulating profile can be applied without difficulty to different motor lengths, for example different length dimensions between the sheet package by cuts to the length of a continuous extruded insulating profile and also allowing to keep the other components such as, for example, the end plates and the connecting plates without having to modify them. In addition, the blocking of the position of the insulating profile in the plate package made with a snap connection to the teeth of the sheet package is a particularly reliable blocking. Preferably, the insulating profile has a geometry 20 of section which is at least substantially a shape of 0. Thus, by realizing the sheet package to function as stator sheets, there will be a very reliable seat of the insulating section. in the winding notch. Preferably, the insulating profile is housed in the winding notch by a connection essentially by the shape, which reduces the cavities filled with air resulting in losses of magnetic flux. According to a development, the insulating section has two branches, the ends of which cling for the peripheral locking each time to opposite edges of two adjacent teeth of the package of 30 magnetoconductive plates. This guarantees the fixing of the insulating profile in the winding notch. According to a development, the length of the insulating profile is predefined so that when it is housed in the winding notch it protrudes from the two axial ends of the sheet package. This allows a passage without leaving an interval of the insulation at the end plate and / or the connection plate of the electric motor. Preferably, the insulating profile which protrudes from the two axial ends of the sheet metal bundle overlaps with at least one electrically insulating axial end plate, the bundle of magnet-conductor plates. This allows a strong electrical insulation of the package of sheets. Preferably, the insulating profile protruding from the two axial ends of the sheet package is connected to at least one electrically insulating branch plate for the electrical connection of the associated coil section of the electric motor. Thus, not only is the electrical insulation of the package of sheets completed, but at the same time the associated winding of the electric motor is electrically terminated externally.
    [0004] According to one development, the wall thickness of the insulating profile is substantially constant and is in the range of 0.1 mm to 0.5 mm. This minimizes the magnetic losses and maximizes the available location for the winding associated with the electric motor in conjunction with a particularly strong electrical insulation effect. The synthetic material is preferably polyphenyl sulfide or a crystalline liquid polymer. Thus, the insulating section under the name "Underwriters Laboratories" (UL) has a sufficiently difficult or heavy flammability and corresponds to a class of electrical insulator for the temperature range necessary for the electric motor. For smaller conditions, for example, polyamide 6 may be used. Alternatively, however, other materials may be used which, with a predefined required wall thickness of the corresponding insulating profile, also the UL list.
    [0005] According to an advantageous technical development, the sheet package is in the form of a stack of stator or rotor laminations. Thus, the insulating profile applies universally to the stator and / or rotor laminations of an electric motor and independently of the design of the electric motor, such as inner rotor or outer rotor.
    [0006] According to a development, the sheet package is a pack of lamellar sheets or a pack of fried soft iron sheets. Thus, the insulating profile is universally applicable for different types of plate package construction for electric motors. The invention also relates to an electric motor comprising at least one package of magnetoconductive plates having at least one winding notch for receiving, at least in segments, a segment of a winding associated with the electric motor and an insulating profile for electrically isolating at least one winding notch, said electric motor being characterized in that the insulating profile is made of an electro-insulating synthetic material and has dimensions which, within the predefined manufacturing tolerances, correspond to the dimensions of the notch of coil, the iso-As profile having a continuous longitudinal opening to receive at least in segments, a coil segment and the length of the insulating profile is greater than the height of the package of magneto-conductive sheets. The invention thus makes it possible to significantly improve the method of manufacturing an electric motor while respecting the required insulation in- tervals as well as the air passageways and the crawling paths. Drawings The present invention will be described hereinafter in more detail with the aid of examples of insulating profiles for winding slots and electric motors thus produced, shown in the accompanying drawings, in which: FIG. schematic axial section of an electric motor equipped with a stator core and a rotor core; FIG. 2 is a perspective view of the stator core of FIG. 1 equipped with insulating profiles according to the invention; 3 is a perspective view of an insulating section according to FIG. 2, FIG. 5 is a section along the line VV of FIG. 4, FIG. FIG. 6 shows the detail VI of FIG. 3 with a winding notch and an insulating profile placed therein, FIG. 7 shows the winding notch of FIG. 6 with the insulating profile and the winding placed. in this one, and FIG. partial axial upe of the stator core of Figure 7 according to the section line VIII-VIII with an end plate and a connecting plate. DESCRIPTION OF EMBODIMENTS OF THE INVENTION FIG. 1 shows, by way of example, an electric motor 100 in the form of an internal rotor motor having a substantially cylindrical rotor core 150 and a rotor shaft 152. Rotor core 150 is placed co-axially in the substantially hollow cylindrical stator core 200. The rotor shaft 152 integrally rotating the rotor core 150 is housed on either side of the rotor core 150, for example, in rolling bearings 110, 112 housed in a motor housing 102 for rotating around a longitudinal axis 124. The stator core 200 is preferably in the form of a pack of lamellar or sintered magneto-conductive laminations 202, which functionally constitute a package of 20 stator laminations 204. The rotor core 150 is made, for example, as a permanent magnet device 156. Alternatively, it is also possible to have a rotor core 150 as a sheet package and a stator core 200 as a permanent magnet device. It should be noted that the electric motor 100 of FIG. 1 is shown only schematically because the structure and operation of the electric motors is sufficiently known according to the state of the art so that it is not necessary for the purpose of simplification of the description, to go into the details of the description of the electric motor 100. It should also be noted that the electric motor 100 is shown only by way of non-limiting example of the invention, as a rotor motor interior because the invention is also applicable to an external rotor motor. Fig. 2 shows the stator core 200 of Fig. 1 with the lamina packet 202 constituting the stator lamina packet 204 which is shown here only by way of example with six axially oriented, identical six coil slots 210; and of continuous form. These notches each receive an insulating profile 220 by a connection mainly by the shape. The six insulating profiles 220 each preferably have an axial longitudinal opening 222, continuous.
    [0007] The geometric dimensions, in particular the contour, of the insulating profiles 220 are sized to correspond at least within the limits of the manufacturing tolerances provided for the dimensions associated in particular with the geometry of the periphery or the geometry of the section of the winding slots 210 of the package. Thus, to a very large extent, the formation of air filled cavities between the insulating profiles 220 and the winding slots 210 and which would weaken the magnetic flux are avoided. The package of magneto-conductive stator plates 204 has a height 214 or axial length dimensioned so that the insulating profiles 220 placed in the winding slots 210 protrude at least one side and preferably both sides at least slightly from the The insulating profiles 220 are preferably of electro-insulating synthetic material and which can be sufficiently mechanically stressed, such as, for example, a phenylene polysulfide or a liquid crystalline polymer and are made by extrusion. continuous plastic and then cut into segments of appropriate length. Alternatively, the insulating profiles 220 may also be manufactured as molded parts. It should be noted, however, that other manufacturing processes are also possible in order to produce insulating profiles 220. In addition, the insulating profiles 220 can be adapted in lengthwise cuts in a simple manner to the plate package. stator with different heights (or axial lengths), which is necessary to achieve electric motors of different powers. Thus, the insulating profile 220 can be applied universally to different types of motors and different power classes. Figure 3 shows the stator core 200 of Figure 2 with the sheet package 202 forming the stator plate package 204 having six winding slots 210 receiving the insulating profiles 220; These profiles preferably each have a substantially 0-shaped cross-sectional geometry. The stator core 200 has six teeth 230 rotated radially inward and spaced evenly in the circumferential direction. The teeth 230 each have two edges 232, 234 oriented substantially apart from each other and each having a substantially circular ring sector sectional geometry; these ridges are one with the teeth. To avoid complicating the drawing, not all edges have references. The winding slots 210 are each in the middle between two adjacent teeth 230 and are perpendicular to the plane of the drawing.
    [0008] FIG. 4 shows the insulating profile 220 of FIG. 3 with the geometric dimensions and in particular the geometry of the O-shaped section or the peripheral contour of the insulating profile 220 defined inter alia by a maximum width 250 and a maximum height 252 for a length 254 and a maximum axial length. The length 254 is chosen so that the insulating profile 220 housed in the winding notch preferably slightly protrudes both sides. The thickness 256 of the wall of the insulating profile 220 is substantially constant and is in a range between 0.1 mm and 0.5 mm including the limits of this gap.
    [0009] FIG. 5 shows the insulating profile 220 of FIG. 4, whose geometry of the substantially 0-shaped section or the peripheral contour of the insulating profile 220 has a head segment 260 as well as a base segment 262 with the opening 222. The head segment 260 preferably consists of a horizontal base segment 264 continuing on both sides by a base wall 266, 268 both of which are inclined at an angle α. The two base walls 266, 268 are preferably continued by a side wall 270, 272 inclined in opposite directions each at an angle 13 which is, here, equal to about 90 °. The two side walls 270, 272 are preferably continued by two branches 274, 276 of the base segment 262 which are at least substantially horizontal in segments. These branches are terminated by curved hook-shaped ends 278, 280 facing each other and leaving free the longitudinal opening 222. The base walls 266, 268, the side walls 270, 274 and the branches 274, 276 with their hook-shaped ends 278 are preferably symmetrical with respect to a plane. The geometry of the 0-shaped section (or peripheral contour) of the insulating profile 220 is preferably designed to be substantially substantially bonded by the shape in the winding notch 5 of the stator plate package 204 according to FIG. FIG. 6 shows the stator lamina 204 coil winding groove 210 of FIG. 2 in which the insulating profile 220 of FIG. 2 has been placed with its longitudinal opening 222 opening radially inwards. In order to ensure that the insulating profile 220 is reliably secured in the winding notch 210, the hook-shaped leg ends 278, 280 engage respectively with the front edges 232, 234 facing one towards the other. 230. For this, the front edges 232, 234 of the teeth preferably each have a slight undercut 240, 242 behind which the hook-shaped branch ends 278, 280 of the insulating profile 220 cling. The two undercuts 240, 242 are preferably each made by a slight radial thickening oriented outwards. In order to achieve a termination as level as the insulating profile 220 with the cylindrical opening 206 for the rotating rotor core 154 according to FIG. 1 in the stator plate package 204, the area of the front ridges 232, 234 teeth preferably each have a groove-like recess 244, 246, slightly inclined on one side and receiving the longitudinal ridges 282, 284 slightly at an angle to the branch ends 278, 280 to also engage with a slight undercut so that the branch ends 278, 280 of the insulating profile 220 terminate flush with the opening 206; in cooperating with the undercuts 240, 242 a particularly guaranteed fastening of the insulating profile 220 in the notch 30 of the winding 210 of the stator laminations 204. FIG. 7 shows the winding notch 210 of FIG. of the stator plate package 204 of the stator core 200 receiving the insulating profile 220 showing by way of illustration, the introduction of two coil segments 300, 302 forming part of the winding 350 of the stator core 200. On both sides of the longitudinal opening 222 of the insulating profile 220 there remains between the stator lamina 204 and the two coil segments 300, 302 of the winding 350, preferably each time an isolation gap. 400, 402 particularly long which guarantees a reliable electric motor operation and particularly without creeping current and without breakdown, even at operating temperatures and / or high rotational speeds. Fig. 8 shows the lamina 202 of the stator lamina 204 of the stator core 200 of Fig. 2 with the winding segment 300 of height 214 or axial length which is preferably slightly less than the length 254 the insulating profile 202 of Figure 2. The axial orientation of the insulating profile 220 in relation to the winding notch 210 of the stator plate package 204 is preferably sized so that the first and the second axial ends 286, 288 of the insulating profile 220 substantially exceed the same length 290, 292 of the first and second axial ends 216, 218 of the stator laminations 204. In addition, and preferably, there is provided a plate of the electrically insulating end 130 which overlaps the first axial end 286 of the insulating profile 220 or engages therewith. Correspondingly and preferentially, an electrically insulating branch plate 140 overlaps the second axial end 288 of the insulating section 220. The end plate 130 preferably serves to terminate the front side of the stator core 200 as well. that the rear connection plate 140 not only secures the stator core 200 rearward but at the same time its electrical connection or electrical connection with an external power source. In addition, the end plate 130 and the connecting plate 140 block the position of the free axial ends 286, 288 of the insulating profile 220 and 30 to guide the winding segment 300.
    [0010] 3038156 10 100 NOMENCLATURE OF MAIN ELEMENTS 102 Electric motor Motor housing 5 110, 112 Roller bearing 124 Longitudinal axis 150 Rotor core 152 Rotor shaft 156 Permanent magnet device 10 200 Stator core 202 Metal package 204 Plate package 210 Winding notch 214 Height of stator laminations 15 216, 218 Axial ends 220 Insulating section 222 Longitudinal opening 230 Tooth 232, 234 Front edge of a tooth 20 240, 242 Small undercut of the front edges of the teeth 244, 246 Slot-like retraction 250 Maximum width of insulating profile 252 Maximum height of insulating section 254 Maximum length of insulating section 25 256 Thickness of insulating section wall 260 Head segment 262 Base segment 264 Base segment 266, 268 Walls base 30 270, 272 Lateral walls 274, 276 Branches of base segment 278, 280 Ends of hook-shaped bent leg 282, 284 Longitudinal edges 29 0, 292 Exceeding the insulating profile of the first and second axial ends of the stator lamina 3038156 300, 302 Coil segments 350 Coiling 400, 402 Isolation intervals 11 5
    权利要求:
    Claims (5)
    [0001]
    CLAIMS1 °) Insulating profile (220) for the electrical insulation of at least one winding notch (210) of a package of laminations (154, 202) of an electric motor (100), the notch winding device (210) receiving at least in segments, a coil segment (300, 302) of a winding (350) associated with the electric motor (100), insulating profiled characterized in that it is made of an electro-synthetic material and insulating dimensions which, within the predefined manufacturing tolerances, correspond to the associated dimensions of the winding notch (210), the insulating section (220) having a continuous longitudinal aperture (222) for receiving at least in segments, the coil segment (300, 302) and its length (254) is greater than the height (214) of the package of magneto-conductive sheets (154, 202).
    [0002]
    2 °) insulating profile according to claim 1, characterized in that it has a section geometry at least close to a shape in 0.
    [0003]
    3 °) insulating profile according to claim 1 or 2, characterized in that it is housed in the winding notch (210) substantially by a connection in the form.
    [0004]
    4 °) insulating profile according to any one of claims 1 to 3, characterized in that it has two branches (274, 276) whose ends (278, 280) cling for the peripheral locking each time to the front edges (232, 234) two adjacent teeth (230) of the package of sheets (154, 202) magneto-conductive.
    [0005]
    5 °) insulating profile according to any one of claims 1 to 4, characterized in that 3038156 13 the length (254) of the insulating profile (220) is predefined so that the insulating profile (220) housed in the winding notch (210) protrudes from both axial ends (216, 218) of the sheet package (154, 202). 6. Insulating profile according to claim 5, characterized in that the insulating profile (220) protruding from the two axial ends (216, 218) of the sheet package (154, 202) is covered at least with a plate of the electrically insulating end (130) of the package of magneto-conductive sheets (154, 202). 7 °) insulating profile according to claim 5 or 6, characterized in that the insulating profile (220) protruding from the two axial ends (216, 218) of the sheet package (154, 202) is connected by at least one plate electrically insulating connection (140) for electrically connecting the associated winding (350) of the electric motor (100). 8 °) insulating profile according to any one of claims 1 to 7, characterized in that the wall thickness (256) of the insulating profile (220) is at least substantially constant and is within a range of between 0.1 mm and 0.5 mm. 9 °) insulating profile according to any one of claims 1 to 8, characterized in that the synthetic material is a phenylene polysulfide or a liquid crystal polymer. 10 °) insulating profile according to any one of claims 1 to 9, characterized in that the sheet package (154, 202) is formed as a package of stator or rotor laminations (156, 204). An insulating profile according to any one of claims 1 to 10, characterized in that the sheet package (154, 202) is a roll of rolled sheets or a package of fried sheets from mild steel. Electric motor (100) comprising at least one magnetoid-conducting lamellae (154, 202) having at least one coiling notch (210) for receiving at least in segments a segment (300, 302) of a winding (300) associated with the electric motor (100) and an insulating profile (220) for electrically insulating at least one winding slot (210), an electric motor characterized in that the insulating section (220) is made of an electrically insulating synthetic material and having dimensions within the predetermined manufacturing tolerances corresponding to the dimensions of the winding notch (210), the insulating profile (220) having a longitudinal opening (222) continuous to receive at less in segments, a coil segment (300, 302) and has a length (254) greater than the height (214) of the package of magneto-conductive sheets (154, 202). 20
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    引用文献:
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    法律状态:
    2017-06-21| PLFP| Fee payment|Year of fee payment: 2 |
    2018-06-25| PLFP| Fee payment|Year of fee payment: 3 |
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    2021-06-22| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
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    DE102015212011.2A|DE102015212011A1|2015-06-29|2015-06-29|Insulating profile and electric motor|
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