Classifications

• • 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
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
• • 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
  • H02K2203/12—Machines characterised by the bobbins for supporting the windings

Definitions

• the present invention relates to a coil for an electric machine according to the preamble of claim 1.
• a generic coil is made with plastic wound bodies, which have a winding area for receiving a wire winding and wherein the winding area in each case by a provided for contact with a laminated stator core of an electric machine winding carrier and two the winding area limiting and with the winding carrier connected leg is formed.
• the coil ends are connected there with a plurality of common ring conductors of an immediately adjacent interconnection arrangement, for example in a triangular or star connection, and thus mechanically fixed, the coil ends being guided as short as possible to their interconnection point.
• Such an arrangement is subject to operational reasons, in particular in conjunction with an internal combustion engine occurring in a vehicle drive train vibrations. This can lead to relative movements and to a permanent alternating load of coil winding and interconnection arrangement, in particular, the coil ends are loaded. As a result, an insulating sheath of the winding wire can be damaged and a short circuit between the lying at different potential conductor elements can be generated. In the worst case, wire breaks can occur in this area, which can lead to a performance restriction or failure of an electrical machine.
• the present invention is based on the cited prior art the object of providing a coil of the type mentioned above, which offers greater resistance and greater reliability under the influence of vibrations. This object is achieved by a generic coil with the characterizing features of claim 1. Advantageous embodiments and further developments of the invention will become apparent from the dependent claims.
• the coil proposed here in particular a coil for a stator of an electrical machine, initially comprises a winding body having a winding region, which is formed by a winding carrier and two limbs delimiting the winding region and connected to the winding carrier, and wherein at least one leg has a first wire guiding region. Furthermore, the coil comprises a winding arranged on the coil body of a winding wire having a Wicklungs gardenings Scheme and a Wicklungsend Scheme and each extending from the Wicklungs managings Trial and the Wicklungsend Scheme coil ends, wherein a coil end is disposed on the first wire guide region and there emerges from the coil.
• the winding start region or winding end region is to be understood as meaning that part of the coil winding on which the winding wire enters a circumferential winding coil winding direction or emerges from the coil winding direction and thereby experiences a change in direction with respect to the wire wound around the coil.
• the winding start region and the winding end region represent the immediate beginning or the end of the coil winding.
• These regions can optionally additionally be mechanically fixed by using a baked enamel wire as a winding wire by baking with the remaining winding.
• measures implemented on a limb are to be understood which essentially restrict the winding wire or the coil ends to a predetermined position of the limb in its freedom of movement and guide the coil ends at least in one direction, whereby a certain backlash may be possible.
• a restriction of the freedom of movement can also be given in two or in all three independent spatial directions.
• the coil wire can also pass the first wire guide area without a change of direction, which, in conjunction with a certain amount of play clearance, can happen. a virtually unhindered passage to a coil wiring arrangement allows, at which the coil ends are set or can be.
• the coil is characterized in particular in that a coil end between the winding start region or the winding end region and the first wire guide region has a free-wire section, in which the winding wire is laid cantilevered.
• the basic idea is to allow the spool ends formed on the spool to move freely, in particular free vibration, rather than defining them, as disclosed in the prior art, over their entire length on the spool itself.
• a wire deformation forced thereby is impressed into a comparatively larger length portion, whereby a deformation per unit length becomes smaller.
• a hitherto repeatedly occurring and finally leading to brittle fracture plastic deformation of the winding wire can be largely avoided by the winding wire is at least predominantly mechanically loaded in the elastic deformation region and thus leading to fraction leading damage mechanisms are subordinate.
• a coil end can be routed to direct, that is about the shortest path between the Wicklungs gardenings Scheme and / or the Wicklungsend Scheme and the first wire guide region to create a certain freedom from vibration.
• the free-wire section can advantageously have a length which is greater than the distance from the winding start region or winding end region and the first wire guide region. As a result, the external forces acting per unit length can be further reduced, with a natural vibration frequency of the free-wire section also decreasing. A greater length of the coil ends thus causes a better compensation of motion with respect to mechanical interference.
• the winding body can have a second wire guide region at the leg opposite the first wire guide region, to which the winding start region and / or the winding end region are attached. are / are.
• this second wire guide region serves to deflect the wire from the wire winding direction in the direction of the opposite leg and, on the other hand, causes a strain relief of the winding wire at the winding start region and winding end region.
• a pin, a projection, a Umlenknut or the like may be formed on the leg.
• the free wire section thus extends between the first wire guide region and the second wire guide region.
• the free-wire section may have an approximately U-shaped bay, which may be formed, for example, approximately in a winding plane of the coil winding or perpendicular to the winding plane.
• the formation of such a bay a considerable extension of the free-wire section is possible in a simple manner.
• This measure can be applied in particular to a coil in which the winding start region and / or the winding end region are formed spatially adjacent to the limb with the first wire guide region through which the winding wire leaves the coil.
• the free-wire section can also be designed to be at least partially helical in order to facilitate the degradation of an externally impressed vibration energy.
• Such an embodiment may be particularly, but not exclusively, applied to coils in which the winding start region and / or the winding end region is formed remote from the leg with the first wire guide region through which the winding wire leaves the coil and the winding wire at the other leg a second wire guide portion is guided.
• 1 a, b show two different representations of single tooth coils for a stator of an electric machine with two coil ends fixed to form a free wire section on a leg of a winding body;
• Fig. 2a-d different representations of single-tooth coils for a stator of an electric machine with two fixed to form a free-wire section on two legs of a bobbin coil ends.
• FIGS. 2 a - d each show a coil 10, in particular for arrangement on teeth of a stator of an electric machine (not shown here), for example for a stator of a permanently excited synchronous machine.
• the coil 10 comprises two end faces, as end caps on a stator tooth can be arranged winding body 20, 60 made of a plastic, each having a winding region 22, 62.
• the winding area 22, 62 is defined by a winding carrier 24, 64 intended for engagement with a stator tooth and two limbs 30, 40 bounding the winding area 22, 62 and connected to the winding carrier 24, 64; 70, 80 formed.
• the winding body 20 corresponds to an already known winding body. Between the winding bodies 20, 60, a further winding region 12a is formed on both sides, which extends in the mounted state of the coil 10 on the stator to a stator tooth.
• a wire winding 82 or coil winding 82 is arranged from a bendable and relatively dimensionally stable winding wire 82d, in particular a copper enameled wire.
• the wire winding 82 thus occupies the space formed by the winding areas 12a, 22 and 62.
• the coil 10 has two free coil ends 82a, 82e or winding ends 82a, 82e, which are both fixed on the winding body 20 and also together on the leg 40 or guided there. When viewed from the outside, the coil ends 82a, 82e pass over the coil 10 into a winding start region 84a and a winding end region 84e.
• the winding start region 84a or the winding end region 84e should be understood to mean that part of the coil winding 82 at which the winding wire 82d enters a circumferential winding coil winding direction or emerges from the coil winding direction and experiences a change in direction with respect to the wire 82d wound around coil 10d ,
• the winding start region 84a and the winding end region 84e represent the immediate start and the end of the coil winding 82, respectively.
• the reference numeral 42a designates a wire insertion portion and 42b a wire lead-out portion.
• the determination or guidance of the winding ends 82a, 82e serves on the one hand the shape retention of the wire winding 82, on the other hand, thereby the free coil ends or winding ends 82a, 82e are spatially aligned in a predetermined manner, so as for interconnection, for example by welding, soldering, crimping or similar methods to stand ready at a location outside of the coil 10. Allen with Figs.
• the free-wire section 86 also has a length that is greater than the distance from the winding start region 84a or the winding end region 84e and the first wire guide region 42.
• the free-wire sections 86a-d additionally in each case a U-shaped bay 88, which is formed in Fig. 1 a approximately in the winding plane of the coil winding 82 and in Fig. 1 b perpendicular to the winding plane.
• the winding plane is to be understood as the plane defined by a rotation of the winding wire 82d on the coil winding 82.
• the winding start region 84 a and the winding end region 84 b are spatially adjacent to the leg 40 with the first wire guide region 42 through which the winding wire 82 d leaves the coil 10.
• the winding body 20 has a second wire guide region 44 on the leg 30 opposite the first wire guide region 42; 44a, b, on which the winding start region 84a and the winding end region 84e are arranged.
• This second wire guide region 44 on the one hand serves to deflect the wire from the wire winding direction in the direction of the opposite leg 40 and on the other hand causes a strain relief of the winding wire 82d at the winding start region 84a and at the winding end region 84e.
• the second wire guide region 44 in FIG. 2a comprises two pins 45a, b projecting from the leg 30 and, in FIGS. 2b-d, respectively protruding hooks 46a, b.
• the free-wire sections 86e-m thus each extend between the first wire guide region 42 and the second wire guide region 44. While the free-wire sections 86e, f in Fig. 2a extend in the shortest path between the wire guide portions 42 and 44, the free-wire sections 86g, h in Fig. 2b on a bay 88, in particular a widened U-shaped bay, which in the present case approximately perpendicular to Winding plane of the coil winding 82 is formed.
• the free-wire sections 86i, k; 86I, m for facilitating the degradation of externally imprinted oscillations helical regions 90, 92 with different orientation on the winding body 20 on.
• the regions 90 are simply coiled in FIG. 2c and formed with a helical plane arranged perpendicular to the winding plane of the coil 10.
• the regions 92 in FIG. 2 d are coiled several times, their spiral plane coinciding approximately with the winding plane of the coil 10.
• a helical plane is to be understood as meaning a mean plane resulting in one revolution of the winding wire 82d.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Windings For Motors And Generators (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (6)

Families Citing this family (10)

Citations (1)

Family Cites Families (12)

• 2014
  • 2014-07-04 DE DE102014213025.5A patent/DE102014213025A1/de not_active Withdrawn
• 2015
  • 2015-06-01 US US15/321,433 patent/US20170207675A1/en not_active Abandoned
  • 2015-06-01 EP EP15725358.4A patent/EP3164930A1/de not_active Withdrawn
  • 2015-06-01 JP JP2016575911A patent/JP6622729B2/ja active Active
  • 2015-06-01 WO PCT/EP2015/062053 patent/WO2016000882A1/de active Application Filing
  • 2015-06-01 CN CN201580036173.1A patent/CN106663983B/zh active Active

Patent Citations (1)

Non-Patent Citations (1)

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