Classifications

• • 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
  • H02K1/22—Rotating parts of the magnetic circuit
  • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
  • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
• • 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
  • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
  • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation

Definitions

• the invention is based on an armature for a direct current motor, in particular for a permanent magnet excited direct current motor, according to the preamble of claim 1.
• the axial length of the permanent magnets is chosen to be greater than the axial length of the armature body to increase the magnetic flux in the armature body (DE 199 42 903 AI, FIGS. 5 and 12). This effect is further enhanced if the anchor body is also extended in the axial direction. By strengthening the magnetic flux, the power-to-weight ratio of the DC motor can be increased or a shorter axial length of the motor can be achieved with the same motor power.
• the armature body consists of a support part made of resin, which is formed in one piece with the armature shaft and has a shorter axial length than the permanent magnets has, and from a non-rotatably seated core, which is made as a molded part from a soft magnetic powder.
• the core has an integral outer wall made of soft magnetic powder, which is left with an air gap in relation to the permanent magnets and has an approximately identical axial position as the permanent magnets.
• the concave section defined by the outer wall, a step section of the core and a concave section of the core delimited by the supporting part effect the position of the armature winding.
• the armature according to the invention for a DC motor with the features of claim 1 has the advantage that the
• the anchor body in the tooth head area is lengthened in a technically simple and cost-effective manner by the flux guide elements and the desired increase in the magnetic flux is thereby achieved.
• the anchor body has a simple shape that is advantageous in terms of production technology.
• an arbitrary anchor length can be achieved by stacking any number of identically designed laminations in one tool and punching and then the flow can be strengthened by placing the flow guide elements axially.
• connection holes preferably two connection holes spaced apart, and axially projecting connection pins, preferably two spaced connection pins, are provided in the end faces of the tooth heads and can be pressed into the connection holes.
• Inference ring placed a barrier in the form of a ring. This barrier prevents the winding head of the armature winding from protruding into areas of the armature body that have to be kept free for the installation of a bearing or a commutator.
• the ring-shaped barriers are snapped onto the return ring in the same way as the flux guiding elements on the tooth tips of the anchor teeth.
• end faces of the yoke ring are again provided with a plurality of connection holes and corresponding connection pins in the annular barriers for pressing into the connection holes.
• the anchor body is composed of a plurality of identical lamellae arranged in a row, the flow guide elements and / or the annular barriers can also be laminated.
• the thickness or axial width of the lamellae of flow guide elements and / or barriers is preferably selected to be equal to the lamellae thickness of the anchor lamellae.
• FIG. 1 shows a half longitudinal section of a direct current motor
• FIG. 2 shows an end view of an armature body of the armature of the direct current motor in FIG. 1,
• FIG. 3 shows a section along the line II - III in FIG. 2,
• FIG. 6 shows a side view of a flow guide element in FIG. 2,
• FIG. 7 shows a side view of a barrier in FIG. 2.
• the DC motor also called DC motor, shown in FIG. 1 in a longitudinal longitudinal section, has a stator 11 and a rotor 12 designed as an internal rotor.
• the stator 11 has a housing 13 for the magnetic yoke, on the annular inner wall 131 thereof
• Permanent magnets 14 with successively opposite polarity are arranged offset from one another by the same circumferential angle.
• the rotor 12 has a rotor or armature shaft 17 mounted in the stator 11 via two rotary bearings 15, 16 and an armature 18 held on the armature shaft 17 in a rotationally fixed manner.
• the armature 18 has an armature body 19, with several, in the exemplary embodiment six, armature teeth 20, which are connected to one another via a yoke ring 21 (FIGS. 4 and 5), and an armature winding 25. Armature teeth 20 and yoke ring 21 are made in one piece.
• Each armature tooth 20 has a radially extending tooth neck 22 and a tooth head 23 projecting symmetrically on both sides in the circumferential direction over the tooth neck 22.
• An annular coil 24 of the armature winding .25 is wound on each tooth neck 22.
• the ring coils 24 are supported on the one hand in the radial direction
• a commutator 26 is arranged on the armature shaft 17 in a rotationally fixed manner, with the commutator bars 27 of which the coil ends of the ring coils 24 are connected.
• the armature 18 is arranged concentrically to the stator 11, with those facing each other
• An air gap 28 remains on the inner surfaces of the permanent magnets 14 and the outer surfaces of the tooth heads 23.
• the anchor body 19 is composed of a large number of abutting and through
• each The armature lamella 29 thus has a lamella of the yoke ring 21, the tooth necks 22 and the tooth heads 23.
• a central through-hole 30 serves to plug the laminated armature body 19 onto the armature shaft 17.
• the two outer lamellae on each side of the armature body 19 have a much larger diameter Passage hole 31, so that a recess is formed on the two end faces of the armature body 19, into which components of the motor, such as commutator 26 and pivot bearing 16, protrude in order to achieve an axially compact construction.
• connection holes 32 evenly spaced in the circumferential direction per tooth head 23 and on the other hand in the area of the yoke ring 21 with connection holes 33 which are arranged equidistantly in the circumferential direction.
• the number of connection holes 33 corresponds to the number of anchor teeth 20 present.
• the connection holes 33 and are each arranged centrally between two successive anchor teeth 20 in the yoke ring 21.
• the permanent magnets 14 of the stator 11 are made axially longer than the armature body 19 (FIG. 1) and on the other hand the armature body 19 is additionally extended in the axial direction.
• This extension is achieved with flux guide elements 34 (FIGS. 2 and 7) which are placed on both end faces of the anchor body 19 on each end face of the tooth heads 23.
• the flow guide elements 34 are adapted in their profile to the tooth tip profile, so that they bear congruently with the tooth tips 25.
• For attachment to the Tooth tips 23 carry the flux guide elements 34
• Link pins 35 (FIG. 6) which are at the same distance from one another as the link holes 32 (FIG. 2) in the tooth tip region of the two outer anchor lamellae 29.
• the link pins 35 are designed such that they can be force-fitted into the link holes 32.
• the flow guide elements 34 are laminated and are composed, for example, of three slats 36, so-called flow guide plates, by punching packages.
• the thickness of the lamellae 36 in the axial direction corresponds to the axial thickness or thickness of the anchor lamellae 29. All the flow guiding elements have the same number of lamellae 36.
• the flux guiding element 34 is composed of a number of lamellae 36 at least on a selected tooth head 23, which is smaller than that
• the tooth tip 23 is selected in accordance with the position of the unbalance to be compensated for. In this case one speaks of a statistical unbalance compensation.
• a further flow element 34 which is attached to a tooth head 23, which is arranged diametrically to the tooth head 23 carrying the flow guide element 34 with the reduced number of lamellae, that is to say rotated by 180 ° in relation to the latter, with the same reduced lamella number fitted.
• This flux guide element 34 with the reduced number of lamellae sits on that end face of the tooth head 23 which is different from that other flux guide element 34 with a reduced number of lamella-bearing face of the other tooth head 23 is turned away.
• Flow guide elements 34 with a reduced number of lamellae are of the same size.
• the armature body 19 is in the area on the two end faces an annular barrier 37 is placed on each of the return ring 21.
• a barrier 37 on one end face of the anchor body 19 can be seen in plan view in FIG. 2 and in side view in FIG. 7.
• the barrier 37 is again laminated and e.g. composed of two lamellae 38 by punching packages.
• a total of six connecting pins 39 protrude from one lamella 38, which are arranged equidistantly in the circumferential direction of the lamella 38.
• the angular distance between the connecting pins 39 corresponds to the angular distance between the connecting holes 33 in the area of the yoke ring 21 in the anchor body 19.
• the barriers 37 are fastened to the anchor body 19 by pressing the connecting pins 39 into the connecting holes 33.
• the width of the slats 38 of the barriers 37 in turn corresponds to the slat thickness of the anchor slats 29.
• FIG. 2 Top view (Fig. 2) and in section (Fig. 3) can be seen.
• the lamination of anchor body 19 In the upper half of the section in FIG. 3 is the lamination of anchor body 19, flow guide elements 34 and barriers 37 shown, which has been omitted in the lower half of the cut. 4 and 5, the anchor body 19 with the removed flow guide elements 34 and barriers 37 is shown in a top view (FIG. 4) and in section (FIG. 5). The lamination is again only given in the upper half of the cut.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Dc Machiner (AREA)
• Manufacture Of Motors, Generators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34853625

Family Applications (1)

Country Status (8)

Families Citing this family (14)

Family Cites Families (15)

• 2004
  • 2004-02-25 DE DE102004008936A patent/DE102004008936A1/de not_active Withdrawn
• 2005
  • 2005-01-20 WO PCT/EP2005/050228 patent/WO2005081380A1/de active Application Filing
  • 2005-01-20 CN CNB2005800059803A patent/CN100530896C/zh not_active Expired - Fee Related
  • 2005-01-20 KR KR1020067017179A patent/KR20060123596A/ko not_active Application Discontinuation
  • 2005-01-20 JP JP2007500199A patent/JP2007523588A/ja active Pending
  • 2005-01-20 EP EP05701564A patent/EP1721378A1/de not_active Withdrawn
  • 2005-01-20 BR BRPI0507997-7A patent/BRPI0507997A/pt not_active IP Right Cessation
  • 2005-01-20 US US10/590,736 patent/US7388313B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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