Classifications

• • 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
  • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Definitions

• Prefabricated toroidal winding head disc for an electrical machine in particular a permanent magnet motor with stator and rotor
• the invention relates to a prefabricated ring sector-shaped winding head disk for an electrical machine, in particular a permanent magnet motor with stator and rotor, at least one laminated core being provided which has grooves for receiving conductor bars, the winding head disk having conductor elements for electrical connection to the conductor bars.
• Known electric motors consist of a stator and a rotor, and a laminated core must be present in the stator or in the rotor.
• This laminated core has grooves in which current conductors are inserted, insulated from one another.
• the connection of the current conductors lying in the individual slots is made by winding head elements.
• the elements for connecting the individual grooves to one another form the end winding.
• Wires or so-called form coils are used as current conductors; This means that when using wires the winding heads consist of semicircular bent wire strands or when using form coils, corresponding semicircular slot bars are used.
• the winding conductor elements connect the current conductors of one slot to the current conductors of the slot of another pole pitch.
• Another disadvantage is that a large wire length or form coil length is required due to the large bending radii, which is reflected directly in the weight and thus also in the price.
• the invention is therefore based on the object of developing an electric motor of the type mentioned in such a way that the connection of the current-carrying conductors lying in the grooves can be implemented clearly, in a space-saving manner and with low weight.
• the object is achieved according to the invention in that the end winding disc consists only of insulated conductor elements without a separate carrier, ie the individual conductor elements are designed to be self-supporting.
• Several ring sectors form an annular disc (end winding disc). Due to the disc-shaped design of the winding head, cumbersome winding of wires or the cumbersome use of form coils is avoided.
• a winding head disk sector or a winding head disk has the function of the electrical connection of at least two grooves with different pole pitches.
• winding head disk sector package In the case of a large number of usages, it may make sense to combine the individual sectors of the ring-shaped winding head disc or the winding head discs itself into one unit, so that this unit also has a disc-shaped appearance; Such a unit is referred to below as a winding head disk sector package or as
• winding head disc package a package arranged on both sides of the laminated core is referred to as a pair of packages.
• a pair of sectors or a pair of disks each consist of a sector or disk arranged on one side of the laminated core.
• a pair of sectors corresponds to a machine circuit, with all pairs of sectors being constructed identically.
• the ring sectors or disks can be produced from a material that is different from the current conductors and that has a lower weight than the material for the current conductors, such as aluminum.
• the connection of the current conductors lying in the grooves to the corresponding sector or disk can advantageously be carried out by plug connections in order to facilitate assembly.
• the number of disk-shaped sectors or winding head disks arranged one behind the other in the axial direction corresponds to the number of grooves per pole pitch or a multiple thereof, the winding head disk sectors or the winding head disks arranged on both sides of the sheet stack are.
• a ring sector preferably consists of loop, connection and connecting elements which form the conductor elements and which are connected in series within a ring sector of the end winding disc.
• the connecting elements in a disk are designed as connecting elements when they are divided. Only the conductor bars of two slots of different pole pitch can be connected by a loop segment. A plurality of conductor or slot bars of a slot can also be connected to the conductor bars or slot bars of the slot of the next pole pitch by means of a sector or a disk.
• the winding head disk sectors or winding head disks themselves can be U-shaped, the current conductors being connected to the legs of the U-shaped conductor elements or the loop segment, and the electrical connection of the two legs being connected by the web he follows.
• a pair of sectors or a pair of disks has at least one connection element; the connecting element, which consists of a supply and discharge, is required to ensure the power supply;
• the function of the connection elements is comparable to that of the brush pair of a DC motor with mechanical commutation.
• the pair of sector packs or a pair of disk packs has at least one number of connection elements corresponding to the slots per pole pitch, or only the pair of disk packs a multiple thereof.
• connection terminals With an increasing number of connection elements, the number of connection terminals is increased, as a result of which the excitation of the motor and consequently its efficiency is increased.
• the excitation must increase with the same number of conductor bars; associated with this is the increase in the magnet length or the motor length; At the same time, however, the overall height decreases because the groove height can be reduced disproportionately with a linear increase in the number of terminals, or quadratic if the conductor length remains the same.
• a minimum of the motor volume when increasing the number of terminals results when the groove height is approximately equal to the magnet height plus twice the yoke thickness.
• the loop elements of a loop segment or a pair of loop segments are connected in series; the same applies to a pair of sector packs consisting of two sector packs arranged on both sides of the laminated core.
• a pair of disks connects a slot number per slot corresponding to twice the number of pole pairs, the series connection being interrupted by connecting terminals; the connected grooves each have the same position with respect to the corresponding rotor magnet.
• the heat generated in the engine is dissipated by cooling the laminated core.
• connection elements are connected to, according to one embodiment, radially arranged to the laminated core, sleeve-shaped conductors.
• a heat sink is provided between the laminated core and the conductors, which are also arranged in the form of a sleeve.
• Each pair of winding head disks is assigned a conductor which is connected to a commutation device.
• the sleeve-shaped conductors are combined radially one above the other to form a ring which is axially upstream of the laminated core.
• the ring can act as a holder for the laminated core, because such a ring has a high strength, so that this ring can be used to fix the entire motor to the inner wall of the tube.
• the winding head with the connection elements acts as part of the holder for the stator core.
• This embodiment is particularly useful for an electric motor that is housed in a tube.
• the yoke of the rotor can rest against the inner wall of the tube, the magnet being fixed to the yoke of the rotor, the laminated core being mounted opposite the rotor and a sector package or disk package extending on both sides of the stator laminated core.
• connection elements are arranged on one side of the stator sheet metal compact, in which case the current is also supplied via this side through the conductors forming the ring.
• Fig.l shows the basic structure of an engine with
• Fig. Shows an embodiment of a U-shaped
• FIG. 6 shows the structure of a winding head disk package or a ring sector package
• Fig. 8 shows the motor as a drive for a pump wheel installed in a tube.
• the motor shown in Fig.l consists of a stator 1 and a rotor 2.
• the stator 1 has the stator core, designated 3, which has grooves for receiving slot bars or conductor bars.
• the inner yoke 6 begins as part of the core 3.
• Below the inner yoke 6 is the heat sink 7, which rests on the sleeve-shaped conductors 8, which via the leads 9, 10 to supply power to the winding head disks 4, 4a, 4b, 4c, 4d and 5, 5a, 5b, 5c, 5d serve.
• With 8a the ground conductor is designated.
• a section of a side view of a winding head disk or a winding head disk sector is shown in FIG.
• This sector shown in Fig.2 covers four slot bars 11-14 per slot and 5 slots 15-19 per pole pitch.
• two connecting element halves 20, 21 result.
• a complete connecting element consists of two halves, each half forming the beginning or the end of adjacent sectors.
• Loop elements 22 are always required if there is more than one slot bar in each slot.
• Pair of winding head disks are connected in series via the slots.
• connection is completely different if more than one slot bar is provided per slot; in this case the slot bars of one slot are connected to those of the slot of the next pole pitch.
• 4a, 4b and 5a, 5b show in detail the connection of the slot bars of two corresponding slots of different pole pitch using a pair of loop segments.
• the loop segment (Fig. 4b, Fig. 5b) is part of a sector; the other loop segment (Fig. 4a, Fig. 5a) forms an independent Segment as part of a pair of sectors.
• 4a, 4b and 5a, 5b each show a pair of segments, that is, one segment on one side of the laminated core, 4 or 5 grooved bars being provided, designated I-VIII and IX, respectively.
• the power supply lines are referred to in each case with 24 and 25; through the lead 24, the grooved rod I receives its current from an upstream connecting element; the flow takes place through the grooved bar designated I there through the stator core (not shown) to the other loop segment (FIGS. 4-a). From - o the river is led to the grooved rod II. From the slot bar II of the loop segment (FIG. 4a) the flow is led through the stator core up to the first loop segment (FIG. 4b) and then connected there with the slot bar III. This continues until all slot rods are connected to one another.
• FIG. 6 three spatially shown winding head disc sectors 4, 4a, 4b are combined to form a sector package or a ring sector package.
• the first winding head disk sector 4 has a bushing piece 4a ', 4b' compared to the other two winding head disk sectors 4a, 4b;
• This socket piece 4a ', 4b' serves for the pluggable reception of the slot bars guided by the individual in the stator core package.
• These socket pieces attached to the winding head disk sectors are of different lengths, so that with an offset arrangement of three
• the socket piece 4b 'of the first sector 4b protrudes through the two other sectors 4, 4a in order to be connected to the corresponding slot bars.
• the type of connector is shown in section.
• the plug elements of the slot bars 11, 12, 13 are in this case visibly connected to the winding head disk sector 4b via the socket piece 4b '.
• the connection of the other winding head disk sectors with the corresponding slot bars cannot be seen from this figure.
• FIG. 8 An application example of the motor according to the invention can be found as a pump motor in a pipe for conveying liquids (FIG. 8).
• the motor shown there is an inner rotor, the rotor designated by 26 being supported by a bearing 27 with respect to the tube wall of the tube 28 and with respect to the stator 29.
• the rotor 26, with the integrated laminated core, has the permanent magnets 30.
• the stator designated as a whole by 29, consists of the stator laminated core 31 and the winding head disk packages 32 arranged on both sides.
• the design of the winding head disk packs 32 can be such that the one winding head disk pack consists only of loop segments and the other packet, in addition to loop segments, also has connecting and connecting elements which are connected to the ring-shaped conductors 33 for the power supply.
• This ring-shaped conductor pack can be designed to be extremely stable and can therefore be used to fasten the entire motor to the tube.
• the conductors 33 which are also provided for receiving the bearing 27, are connected to a sleeve-shaped power supply device 34 which receives the commutation device 35 for the motor.
• This motor lies in particular in its extremely slim design, the motor being cooled by the conveying medium when this motor is used in a pipe.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Windings For Motors And Generators (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6429241

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (6)

Citations (7)

Family Cites Families (2)

• 1991
  • 1991-04-10 DE DE19914111626 patent/DE4111626A1/de active Granted
• 1992
  • 1992-04-09 WO PCT/DE1992/000286 patent/WO1992019036A1/de active Application Filing

Patent Citations (7)

Also Published As

Similar Documents

Legal Events