WO2013076442A2 - Raccordement d'une machine électrique tournante - Google Patents

Raccordement d'une machine électrique tournante Download PDF

Info

Publication number
WO2013076442A2
WO2013076442A2 PCT/GB2012/000851 GB2012000851W WO2013076442A2 WO 2013076442 A2 WO2013076442 A2 WO 2013076442A2 GB 2012000851 W GB2012000851 W GB 2012000851W WO 2013076442 A2 WO2013076442 A2 WO 2013076442A2
Authority
WO
WIPO (PCT)
Prior art keywords
connection unit
stator
electrical machine
coil
wire
Prior art date
Application number
PCT/GB2012/000851
Other languages
English (en)
Other versions
WO2013076442A3 (fr
Inventor
Martin Christopher STEWART
Richard J. Gray
Jim Johnson
Krzysztof Wejrzanowski
Laxman Shah
Abdelslam Mebarki
Andy Hutchinson
Original Assignee
Cummins Generator Technologies Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Generator Technologies Limited filed Critical Cummins Generator Technologies Limited
Priority to GB1409961.8A priority Critical patent/GB2511244B/en
Publication of WO2013076442A2 publication Critical patent/WO2013076442A2/fr
Publication of WO2013076442A3 publication Critical patent/WO2013076442A3/fr

Links

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
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby
    • 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
    • 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
    • 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 in general to techniques for connecting windings and other components in a rotating electrical machine.
  • Rotating electrical machines such as motors and generators, generally comprise a rotor and a stator separated by a small air gap. A magnetic flux developed by the rotor crosses the air gap and combines with stator windings.
  • a generator when the rotor is rotated by a prime mover, the rotating magnetic field causes an electrical current to flow in the stator windings, thereby generating the output power.
  • an electrical current is supplied to the stator windings and the thus generated magnetic field causes the rotor to rotate.
  • Known stators comprise a laminated metal core with a number of teeth extending radially inwards, the teeth defining a plurality of slots for accommodating the stator windings.
  • the stator windings may be wound into the slots in situ, or else preformed coils may be slid onto the teeth. In either case, it is necessary to connect the windings to the terminals of the electrical machine.
  • a number of separate coils are provided around the machine, and this can result in a complex arrangement of wires leading to the terminals.
  • connection unit for connecting windings in the stator of a rotating electrical machine, the connection unit having a body formed from an electrically insulating material, the body holding a plurality of electrically conductive rings each of which is arranged to connect to a stator winding, wherein the stator windings comprise coils, and each of the conductive rings comprises a terminal for connecting an end wire of one coil and a start wire of an adjacent coil to the conductive ring and to each other.
  • the present invention may provide the advantage that, by providing a connection unit with a plurality of electrically conductive rings, and by providing each of the conductive rings with a terminal for connecting an end wire of one coil and a start wire of an adjacent coil to the conductive ring and to each other, the number of steps which need to be undertaken during assembly of the machine can be reduced, thereby facilitating assembly.
  • it may be possible to connect the wires to the conductive ring and to each other in one step.
  • the terminals comprise a terminal pad.
  • the wires may be connected to the terminal pad, for example, by means of a soldering or welding process.
  • the terminal pads may be arranged to connect the end wire of one coil with the start wire of an adjacent coil, and to connect both wires to an appropriate one of the conductive rings.
  • the terminals are crimp terminals.
  • the crimp terminals may comprise two malleable terminal posts.
  • the wires may be inserted between the posts, which may then be crimped using a crimping tool in order to connect the wires to the conductive ring and to each other. This may provide a quick and convenient way of connecting the wires.
  • the terminal posts may extend outwards from the conductive rings in an axial direction.
  • the terminal posts are angled so as to be closer to each other at their base (adjacent the conductive ring) than at their distal end.
  • the terminal posts may form a V-shape. This can facilitate insertion of the wires between the terminal posts and thus facilitate manufacture.
  • the wires may be soldered to the and/or each other.
  • hot stake crimping may be used.
  • connection unit may be moulded, for example, from a plastic resin.
  • the body is over-moulded around the conductive rings. This can allow the connection unit to be manufactured in advance, and allow the body to hold the conductive rings in place and provide electrical insulation.
  • the body of the connection unit comprises holes through which wires from the stator windings may pass in order to connect to the electrically conductive rings.
  • the stator windings may comprise coils, and the connection unit may be arranged to connect the end wire of one coil with the start wire of an adjacent coil. This may facilitate connection of the coils in the desired connection arrangement.
  • the body of the connection unit may comprise an electrically insulating bridge which passes over at least some of the electrically conductive rings. This may be achieved, for example, by over-moulding the body of the connection unit around the conductive rings.
  • a terminal pad passes through the electrically insulating bridge, in order to allow a wire from the stator windings to be connected to one of the conductive rings.
  • the electrically-insulating bridge can allow the wire to be insulated from the other conductive rings.
  • the body of the conneaion unit may define a channel in which the electrically conductive rings are accommodated.
  • the connection unit may have an outer rim, a central plate and an inner wall which together form a U-shaped channel for the conductive rings. This can allow the conductive rings to be held in place and electrically insulated from other components.
  • the channel may be arranged to receive an electrically-insulating potting compound.
  • the channel may be filled with a potting resin once the connection unit is in place and the electrical connections have been made. This can allow the electrical components to be held in place and electrically insulated.
  • the walls of the channel can be used to hold the potting compound in place while it sets.
  • connection unit may further comprise an insert arranged to prevent the potting compound from leaking through holes in the connection unit,
  • the insert may be put in place once the electrical connections have been made, and before the potting compound is added.
  • the insert may also hold wires from the stator windings in place and/or provide electrical insulation.
  • connection unit may be annular, and may be designed to interface with an annular stator core.
  • connection unit may be designed to fit next to a stator core in an axial direction. This can allow the connection unit to be readily incorporated as part of the overall machine design.
  • the electrically conductive rings may be concentric. This can allow the axial width of the connection unit to be minimised.
  • the number of electrically conductive rings will depend upon the number of phases of the electrical machine and the desired connection arrangement. For example, in a three phase machine which is to be connected in a delta arrangement, three electrically conductive rings may be provided. If a star connection arrangement is to be used, four rings may be provided, with the fourth ring being used for the neutral connection point. However, any other number of conductive rings may be provided as appropriate to the circumstances.
  • the electrical machine may be a three phase machine, and the connection unit may comprise three or four electrically conductive rings each of which is arranged to connect one phase of the electrical machine.
  • each conductive ring is connected to an electrical terminal.
  • the electrical terminals may be located in a recess in the body of the connection unit.
  • the recess may be arranged to accept an external terminal block. This can facilitate the connection of external electrical leads to the stator by the user.
  • a stator assembly for a rotating electrical machine comprising a stator core, stator windings, and a connection unit in any of the forms described above, wherein the stator windings are connected by means of the connection unit.
  • the conductive rings in the connection unit are connected to the stator windings using a suitable connection arrangement.
  • the electrically conductive rings may connect the stator windings in a delta connection, although other connections such as star connections could be used instead.
  • the stator core may comprise a plurality of teeth defining slots for accommodating stator windings.
  • the stator windings may comprise coils wound around the teeth.
  • the slots for accommodating the stator windings may be tapered.
  • the teeth may be desirable for the teeth to have parallel sides in order to ensure that they have sufficient strength and to ensure adequate flux density between the stator and the rotor.
  • the slots may have a width which increases with radial distance from the axis of rotation. With such an arrangement, it may be difficult to insert the coils into the slots and to achieve the desired slot fill factor.
  • the coils are tapered.
  • coils with tapered sides are alternated with coils with parallel sides.
  • the coils with the tapered side may be inserted first. Once the tapered coils have been inserted, the gaps left in the slots may have parallel sides. The parallel coils may then be inserted into the gaps. This arrangement may facilitate insertion of the coils into the slots and help to achieve the desired slot fill factor.
  • a coil with tapered sides may be formed by reducing the number of turns in windings in the coil towards the end of the coil which is to face radially inwards.
  • the coils may be wound in the slots in situ.
  • the coils are wound on bobbins.
  • the coils may be wound in advance on bobbins before the machine is assembled. This may facilitate manufacture of the machine.
  • the bobbins have rear walls which interface with the body of the connection unit.
  • the rear walls of the bobbins may extend beyond the stator in an axial direction, and the connection unit may fit over the protruding parts of the rear walls. This can allow the connection unit to be easily fitted on the stator.
  • the bobbins and/or the connection unit may comprise means for locating the connection unit on the bobbins.
  • at least one of the bobbins may have a recess or a protrusion which mates with a corresponding protrusion or recess on the connection unit. This can help to ensure accurate location of the connection unit on the stator.
  • the bobbins themselves comprise means for interlocking with the stator core.
  • the bobbins may comprise clips which allow them to be held in place on the stator core.
  • the use of pre-wound bobbins can facilitate manufacture and improve the machine's performance.
  • the bobbin is wound such that the windings from any one layer only have physical contact with those in an immediately adjacent layer. This can reduce the voltage which is seen by the wire insulation in comparison to the case where the windings are wound randomly. This in turn may improve reliability and reduce the cost of the machine.
  • the bobbin is wound using a conventional winding process, the wire which is fed to the bottom layer will come into contact with wires in other layers, resulting in an increased voltage across the insulation of these wires.
  • the stator windings comprise at least one coil wound on a bobbin in a plurality of layers
  • the bobbin comprises means for feeding a wire to a bottom layer of the coil such that the wire is electrically insulated from other layers of the coil. This can prevent the wire which is fed to the bottom of the coil from coming into contact with other wires in the coil, thereby reducing the voltage across the wire's insulation.
  • a bobbin for use in the stator of a rotating electrical machine, the bobbin being arranged to receive a coil having a plurality of layers, wherein the bobbin comprises means for feeding a wire to a bottom layer of the coil such that the wire is electrically insulated from other layers of the coil.
  • the bobbin comprises a rear wall with a slot which accommodates the wire. This can help to insulate the wire from other layers of the coil, and may also provide a convenient way of presenting the wire for connection to other components.
  • the rear wall may further comprise a slot for an end wire of the coil.
  • the bobbin may further comprise an insulating member between the coil and the rear wall.
  • the insulating member may be, for example, insulating paper, although other insulating means such as a layer of plastic could be used instead.
  • the insulating member may have a hole adjacent to the bottom layer of the coil through with the wire passes.
  • a housing arrangement for an electrical machine may comprise an inner housing and an outer housing. This can allow the machine to be provided as a self- contained unit suitable for use in different applications.
  • the housing arrangement may therefore comprise an inner housing arranged to accommodate the electrical machine, and an outer housing arranged to fit around the inner housing.
  • the electrical machine may include various internal electrical components to which connections may need to be made-.
  • the machine may comprises one or more sensors, such as temperature sensors or position sensors, in order to monitor various parameters of the machine. In this case it may be necessary to feed a signal from a sensor to the outside of the housing.
  • the outer housing may comprise a passage for connecting an internal electrical component to the outside of the housing.
  • a housing arrangement for an electrical machine comprising an inner housing arranged to accommodate the electrical machine, and an outer housing arranged to fit around the inner housing, the outer housing comprising a passage for connecting an internal electrical component to the outside of the housing.
  • the outer housing comprises a connector, and the passage is arranged to feed a wire from the electrical component to the connector. This can facilitate the connection of the component to the outside of the housing.
  • the connector may be a low voltage connector (in comparison to the high voltage which may be provided to the stator windings).
  • the connector may be arranged to seal the passage. This can provide ingress protection, and avoid the need to seal the passage itself.
  • the passage may be provided inside the outer housing.
  • the passage may be located inside a rib on the outside of the outer housing. This can allow a wire from the component to remain inside the housing, thereby protecting the wire from damage.
  • the internal electrical component may be a sensor.
  • the sensor may sense a parameter of the electrical machine, or some other parameter.
  • the sensor may be a temperature sensor, an interlock sensor, a position sensor, or any other type of sensor.
  • the component is inside the housing.
  • two different types of sensor may be provided inside the housing.
  • temperature sensors and position sensors may be located adjacent to the machine.
  • the housing may include an interlock sensor to detect when an access point is opened.
  • the interlock sensor may detect when a lid to a high voltage connector is opened.
  • the passage may therefore be arranged to connect two separate internal electrical components to the outside of the machine.
  • the passage may be arranged to feed a wire from an interlock sensor to a connector on the outer housing, and to feed a wire from a sensor which senses a machine parameter to the same or a different connector.
  • the machine parameter may be, for example, temperature or position.
  • a method of connecting coils in the stator of a rotating electrical machine comprising placing a connection unit adjacent to the stator, the connection unit having a body formed from an electrically insulating material holding a plurality of electrically conductive rings, and connecting the coils to the conductive rings, wherein the each of the conductive rings comprises a terminal and the method comprises connecting an end wire of one coil and a start wire of an adjacent coil to a terminal, thereby to connect the wires to the conductive ring and to each other.
  • a method of winding a coil on a bobbin comprising locating a start wire of the coil in a slot in a rear wall of the bobbin, placing insulating means against the rear wall of the bobbin, and winding the coil in a plurality of layers on the bobbin.
  • a method of assembling an electrical machine inside in a housing arrangement comprising an inner housing and an outer housing, the method comprising feeding a wire from a sensor which senses a parameter of the electrical machine to a connector on the outer housing through a passage which is arranged to connect an interlock sensor with the or a connector.
  • Figure 1 shows parts of a stator assembly according to an embodiment of the invention
  • Figures 2 and 3 illustrate the process of assembling bobbins on a stator core in an embodiment of the invention
  • Figure 4 is an axial cross section through part of the stator core
  • Figure 5 shows a bobbin for use with stator windings in an embodiment of the invention
  • Figure 6 is an exploded view of the stator core and a connection ring
  • Figure 7 shows a view through part of the connection ring
  • Figure 8 shows parts of the connection ring
  • Figure 9 shows part of the stator assembly with a connection ring insert
  • Figure 10 shows an alternative embodiment of the connection ring
  • Figure 1 1 shows a cross-section through part of an electrical machine unit; and Figure 12 shows another cross-section through part of the electrical machine unit.
  • Figure 1 shows parts of a stator assembly according to an embodiment of the invention.
  • the stator assembly of Figure 1 is part of a rotating electrical machine, which in this example is a three phase motor/generator.
  • a rotor (not shown) is located inside the stator assembly.
  • the stator assembly comprises an annular stator core 10, sometimes referred to as a back iron, which is formed from laminated sheets of metal.
  • the stator core comprises a number of teeth 12 which project radially inwards.
  • the teeth 12 define slots 14, which accommodate stator windings.
  • the electrical machine has eight poles and three phases, with one slot provided per pole per phase.
  • the stator core has a total of 24 slots for the stator windings.
  • stator windings are provided in the form of coils which are wound in advance on bobbins 16, 18.
  • the wound bobbins 16, 18 are pressed over the teeth 12 so that each coil partially occupies two slots.
  • each slot 14 accommodates windings from two adjacent coils.
  • Figures 2 and 3 illustrate the process of assembling the bobbins on the stator core in an embodiment of the invention.
  • the teeth 12 have parallel sides.
  • the slots 14 are tapered, with a width which increases with radial distance from the axis of rotation.
  • This arrangement may be advantageous in terms of maximising the magnetic flux between the stator and the rotor.
  • two types of wound bobbin are used, one with tapered sides and one with parallel sides.
  • the tapered bobbins 16 are formed by reducing the number of turns in the windings towards the end of the bobbin which is to face radially inwards.
  • the parallel bobbins 18 are formed with all the windings having the same number of turns.
  • the tapered bobbins 16 are first inserted over alternate teeth, as shown in Figure 2. Once the tapered bobbins have been inserted, the gaps left in the slots have parallel sides. The parallel bobbins 18 are then inserted in the gaps, over the remaining teeth, as shown in Figure 3.
  • Figure 4 is an axial cross section through part of the stator core 10 with the bobbins 16, 18 in place. As can be seen from Figure 4, with this arrangement a high slot fill factor can be achieved despite the tapered sides of the slots 14. This can help to improve the machine's efficiency and power density.
  • the bobbins 16, 18 are pre-wound.
  • FIG. 5 shows a bobbin for use with stator windings in an embodiment of the invention.
  • the bobbin 18 comprises a front wall 22, a rear wall 24, and a core 26.
  • the rear wall 24 includes a slot 28 for the start wire of the coil, and a slot 30 for the end wire of the coil.
  • a piece of insulation paper 32 Prior to winding, a piece of insulation paper 32 is inserted over the bobbin against the rear wall 24.
  • a hole 34 is provided in the insulation paper 32 at the bottom of the slot 28.
  • the start wire of the coil is fed through the hole 34 in the insulation paper, and clipped into the slot 28.
  • the bobbin is then wound with the appropriate number of turns.
  • the start wire is insulated from all but the first layer of windings by virtue of the slot 28 and the insulation paper 32.
  • the end wire of the coil is clipped into slot 30.
  • the stator assembly includes a connection ring 40 which is used to connect the stator windings.
  • the connection ring 40 is positioned adjacent to the stator core 10 and the bobbins 16, 18 in an axial direction.
  • the connection ring 40 has a body which is moulded from an electrically non-conductive material such as a plastic resin. Inside the body are three electrically conductive rings 42. Each of the conductive rings 42 provides one of the three phases of the electrical machine. Each of the conductive rings 42 is connected to a terminal in a terminal block 44.
  • the terminal block 44 provides the high voltage electrical connections for the stator.
  • FIG. 6 is an exploded view of the stator core and connection ring.
  • the connection ring 40 has an outer rim 46 which fits over the protruding parts of the bobbins.
  • Each of the bobbins 16, 18 is wound with a coil having a start wire 36 and an end wire 38.
  • the wires 36, 38 are held in place with the slots 28, 30 shown in Figure 5.
  • Holes 48 are provided at spaced locations around the connection ring which coincide with the wires 36, 38. During assembly, as the connection ring is brought towards the stator core, the wires 36, 38 are passed through the holes 48.
  • connection ring 40 when in place on the stator core.
  • the connection ring has an outer rim 46 around its circumference. The lower part of the outer rim 46 fits over the rear walls 24 of the bobbins.
  • a central plate 50 extends radially inwards from the centre of the outer rim, and connects with an inner wall 52.
  • FIG. 8 shows parts of the connection ring in more detail. Referring to Figure 8, an end wire 38 from one coil and a start wire 36 from the adjacent coil in the same slot pass through hole 48 in the central plate 50. The end wire 38 and start wire 36 are bent over on top of an electrically insulating bridge 56.
  • the bridge 56 passes over the three conductive rings 42 at the point where the wires 36, 38 exit the hole 48.
  • a terminal pad 58 passes through the bridge 56 at one of three possible locations and is electrically connected to one of the conductive rings 42.
  • the end wire 38 and start wire 36 are both connected to the terminal pad 58 by means of a welding process, such as ultrasonic welding. In this way, the start wire 36 and end wire 38 are connected to each other and to an appropriate one of the three conductive rings 42.
  • each coil in the bobbins 16, 18 are connected in a parallel delta arrangement.
  • each coil is connected across two of the three conductive rings 42, with coils of the same phase being connected in parallel with each other.
  • connection ring has four conductive rings. This enables the coils to be connected in a star arrangement with one ring used for the neutral connection point.
  • a connection ring insert 60 is inserted into the connection ring 40 once the wires 36, 38 have been connected to the terminal pads 58.
  • the connection ring insert 60 is used to cover the holes 48, and well as to insulate the wires 36, 38 and to hold them in place.
  • Figure 9 shows part of the stator assembly with the connection ring insert 60 in place. As indicated in Figure 9, once the connection ring 40 and connection ring insert 60 have been assembled on the stator, a potting resin is used to fill the gaps in the connection ring and to provide insulation for the electrical components.
  • connection ring insert 60 prevents the potting resin from leaking out of the holes 48 and onto the bobbin windings below.
  • Figure 10 shows an alternative embodiment of the connection ring. In the embodiment of Figure 10, a crimp terminal is used in place of the terminal pad of Figure 8.
  • an end wire 38 from one coil and a start wire 36 from the adjacent coil in the same slot pass through hole 48 in the central plate 50.
  • the end wire 38 and start wire 36 are bent over on top of an electrically insulating retainer, which comprises slots 55 for retaining the wires.
  • a bridge 56 is formed over the conductive rings to which the wires are not connected.
  • the conductive rings are provided with crimping terminals 59.
  • the crimping terminals 59 comprise two malleable posts which are initially formed in a V-shape.
  • the wires 36, 38 are placed between the two posts inside the V. When the wires are in place, a crimping tool is used to compress the posts, thereby forming an electrical connection.
  • the wires may also be soldered to each other and/or the posts.
  • hot stake crimping may be used, which is a combination of mechanical crimping and fusion.
  • the start wire 36 and end wire 38 are connected to each other and to an appropriate one of the three conductive rings 42.
  • a recess 45 is provided on the connection ring outer surface in which the terminals 44 are located. The recess is arranged to accept a terminal block which is used for the high voltage connections to the electrical machine. The accuracy of this location is important to ensure that the user can accurately fit high voltage leads to the electrical machine.
  • connection ring described above is provided as a unitary component. This can remove the need to undertake various assembly steps to bring together the necessary components in the right orientation and the correct position with the desired accuracy. This arrangement therefore ensures that the assembly operations can be easily achieved in volume production.
  • connection ring has been found to be glass-filled plastic resin.
  • the plastic resin is selected for its stability across a wide range of temperatures, for example between -40 °C and 150 °C, to ensure that it can perform without damage or any degradation over the life of the product.
  • the connection ring may be formed by over- moulding the plastic resin around the conductive rings.
  • the plastic resin provides a physical support for each of the three concentric conductive rings, and positions them correctly above the bobbins and stator core.
  • the plastic resin also provides electrical insulation between each of the three concentric conductive rings, as well as between the conductive rings and the stator core, and the conductive rings and the stator windings.
  • the plastic resin provides electrical insulation between the wires from the bobbins and the other two conductive rings to prevent shorting across the electrical phases.
  • the plastic resin walls of the connection ring provide a natural channel to physically contain a potting compound which is applied inside the channel once the welded connections are complete.
  • a suitable material for the conductive rings is a metal such as copper.
  • the grade of copper is selected for its electrical properties, and the sire of the rings is chosen to ensure the current carrying capacity of each ring is sufficient for the size of electrical machine.
  • Figure 1 1 shows a cross-section through part of an electrical machine unit.
  • the electrical machine unit comprises a stator core 10, a rotor 70, and a two-part housing arrangement comprising an inner housing 62 and an outer housing 64.
  • the inner housing 62 and the outer housing 64 are both cup-shaped.
  • the inner housing 62 is arranged to support the stator core 10, and the outer housing 64 is arranged to slide over the inner housing in order to close off the electrical machine.
  • the outer housing 64 includes two circumferential ribs 66, 68 on its inner surface. The circumferential ribs 66, 68 are used to hold the connection ring 40 in place in the assembled machine.
  • a cooling passage 72 is formed between the inner housing 62 and outer housing 64.
  • O-rings 74, 76 are provided on either side of the cooling passage 72 in order to prevent coolant from leaking out of the passage.
  • the O- rings 74, 76 also provide good ingress protection for the machine's internal components.
  • this arrangement can make it difficult to connect low voltage components to the outside of the machine.
  • Figure 12 shows another cross-section through part of the electrical machine unit.
  • the connection ring 40 is located on the left hand side.
  • a high voltage connector 78 is used to provide high voltage connections to the connection ring 40.
  • a low connector 80 is used to provide low voltage connections to internal electrical components.
  • the high voltage connector 78 comprises a main body 82 and a lid 84.
  • the main body and lid are sealed by means of seal 86.
  • a high voltage interlock 88 is provided, in order to monitor whether the lid is in place for reasons of safety.
  • the high voltage interlock is a press-switch which produces a signal when the lid is removed.
  • a wire 94 runs from the high voltage interlock 88, through a passage 90 in the outer housing 64, to the low voltage connector 80.
  • the passage 90 is internal, and is located inside a rib on the outer housing.
  • the passage 90 is sealed by the low voltage connector 80. This arrangement protects the wire, and provides good ingress protection.
  • temperature sensor 92 which in this case is a resistive thermal device (RTD).
  • RTD resistive thermal device
  • the temperature sensor 92 is used to measure the temperature of the stator in order to ensure that it does not overheat. In this arrangement, it is necessary to bring a signal from the temperature sensor 92 to the low voltage connector 80. However, the presence of the cooling passage 72 and O-rings 74, 76 makes this difficult.
  • a wire 96 from the temperature sensor 92 is run around the top of the machine, through the high voltage connector 78, through the passage 90, and to the low voltage connector 80. This allows the wire to avoid the cooling passage 72 and O-rings 74, 76. Since the passage 90 is internal and is sealed by the low voltage connector 80, the wire is protected from damage and ingress protection is achieved. Furthermore, since the passage 90 is used by wires from both the high voltage interlock 88 and the temperature sensor 92, this avoids the need to create separate passages for two devices.
  • the passage 90 can also be used to bring wires from other electrical devices, such as position sensors or additional temperature sensors, to the low voltage connector 80. While preferred embodiments of the invention have been described with reference to ⁇ specific examples, it will be appreciated that modifications of detail are possible within the scope of the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

On décrit une unité de raccordement servant à raccorder des enroulements présents dans le stator d'une machine électrique tournante. L'unité de raccordement (40) présente un corps formé d'un matériau électro-isolant, le corps contenant une pluralité de bagues électroconductrices (42) agencées chacune pour se raccorder à un enroulement du stator. Les enroulements du stator comprennent des bobines, et chaque bague conductrice comporte une borne qui raccorde un fil terminal (38) d'une bobine et un fil de départ (36) d'une bobine adjacente à la bague conductrice, et l'un à l'autre. Cela peut faciliter l'assemblage de la machine.
PCT/GB2012/000851 2011-11-22 2012-11-21 Raccordement d'une machine électrique tournante WO2013076442A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1409961.8A GB2511244B (en) 2011-11-22 2012-11-21 Connecting a rotating electrical machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1120177.9 2011-11-22
GBGB1120177.9A GB201120177D0 (en) 2011-11-22 2011-11-22 Connecting a rotating electrical machine

Publications (2)

Publication Number Publication Date
WO2013076442A2 true WO2013076442A2 (fr) 2013-05-30
WO2013076442A3 WO2013076442A3 (fr) 2015-02-26

Family

ID=45475567

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2012/000851 WO2013076442A2 (fr) 2011-11-22 2012-11-21 Raccordement d'une machine électrique tournante

Country Status (2)

Country Link
GB (2) GB201120177D0 (fr)
WO (1) WO2013076442A2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015104283A (ja) * 2013-11-27 2015-06-04 タイコエレクトロニクスジャパン合同会社 モータ用コネクタ及びモータ用コネクタ組立体
CN105720722A (zh) * 2014-12-22 2016-06-29 马涅蒂-马瑞利公司 电机以及相关的组装方法
WO2016134895A1 (fr) * 2015-02-25 2016-09-01 Zf Friedrichshafen Ag Stator pour une machine électrique avec dispositif d'interconnexion scellé et machine électrique équipée d'un tel stator
CN109787391A (zh) * 2019-01-03 2019-05-21 珠海仲华智能制造技术有限公司 一种连接端子及电机
TWI742512B (zh) * 2019-07-15 2021-10-11 南韓商Ｌｇ電子股份有限公司 馬達
CN114498991A (zh) * 2021-12-30 2022-05-13 西安中车永电捷力风能有限公司 一种双馈风力发电机的定子绕组联接结构
DE102021205233A1 (de) 2021-05-21 2022-11-24 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Verfahren zur Bewicklung von Statorzähnen, Stator und Elektromotor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018149132A1 (fr) * 2017-02-16 2018-08-23 博迪加科技(北京)有限公司 Connecteur et vêtement intelligent

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1117931A (en) 1965-01-19 1968-06-26 Marconi Instruments Ltd Improvements in or relating to wave form generators

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1107429A3 (fr) * 1999-12-01 2005-06-15 Kabushiki Kaisha MORIC Connexions des enroulements de stator d'une machine électrique rotative
JP4789676B2 (ja) * 2006-03-29 2011-10-12 トヨタ自動車株式会社 回転電機用端末モジュールおよび回転電機
DE102006021898A1 (de) * 2006-05-11 2007-11-22 Zf Friedrichshafen Ag Stator für eine elektrische Maschine
DE202006012075U1 (de) * 2006-08-04 2007-12-27 Ebm-Papst Mulfingen Gmbh & Co. Kg Stator mit Schaltscheibe
DE102009045551A1 (de) * 2008-11-05 2010-05-06 Zf Friedrichshafen Ag Stator für eine elektrische Maschine mit einer Verschaltungseinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1117931A (en) 1965-01-19 1968-06-26 Marconi Instruments Ltd Improvements in or relating to wave form generators

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015104283A (ja) * 2013-11-27 2015-06-04 タイコエレクトロニクスジャパン合同会社 モータ用コネクタ及びモータ用コネクタ組立体
CN105720722A (zh) * 2014-12-22 2016-06-29 马涅蒂-马瑞利公司 电机以及相关的组装方法
EP3038236A1 (fr) * 2014-12-22 2016-06-29 Magneti Marelli S.p.A. Machine électrique et son procédé d'assemblage
US10069364B2 (en) 2014-12-22 2018-09-04 MAGNETI MARELLI S.p.A. Electric machine and related assembly method
CN105720722B (zh) * 2014-12-22 2019-07-05 马涅蒂-马瑞利公司 电机以及相关的组装方法
WO2016134895A1 (fr) * 2015-02-25 2016-09-01 Zf Friedrichshafen Ag Stator pour une machine électrique avec dispositif d'interconnexion scellé et machine électrique équipée d'un tel stator
CN109787391A (zh) * 2019-01-03 2019-05-21 珠海仲华智能制造技术有限公司 一种连接端子及电机
TWI742512B (zh) * 2019-07-15 2021-10-11 南韓商Ｌｇ電子股份有限公司 馬達
US11563349B2 (en) 2019-07-15 2023-01-24 Lg Electronics Inc. Motor
DE102021205233A1 (de) 2021-05-21 2022-11-24 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Verfahren zur Bewicklung von Statorzähnen, Stator und Elektromotor
CN114498991A (zh) * 2021-12-30 2022-05-13 西安中车永电捷力风能有限公司 一种双馈风力发电机的定子绕组联接结构
CN114498991B (zh) * 2021-12-30 2024-06-07 西安中车永电捷力风能有限公司 一种双馈风力发电机的定子绕组联接结构

Also Published As

Publication number Publication date
GB201120177D0 (en) 2012-01-04
WO2013076442A3 (fr) 2015-02-26
GB2511244A (en) 2014-08-27
GB2511244B (en) 2018-09-19
GB201409961D0 (en) 2014-07-16

Similar Documents

Publication Publication Date Title
WO2013076442A2 (fr) Raccordement d'une machine électrique tournante
US7952245B2 (en) Power distribution unit for rotary electric machine with linear conductor connecting ring having terminal section with axially extending hole for connecting stator coil, and method for assembling rotary electric machine
US8390159B2 (en) Stator for electric rotating machine
JP6068625B2 (ja) セグメント式ステータアセンブリ
US7663287B2 (en) Motor
JP6178869B2 (ja) 自動車部品用の電気モータ
JP6079944B2 (ja) 内燃機関用回転電機およびそのステータ
US7598637B2 (en) Stator for an electrical machine
TW200934062A (en) Stator and rotating electrical machine using the same
US8407881B2 (en) Process of manufacturing a stator
US20090146513A1 (en) Rotary electric machine stator assembly design and manufacturing method
JP2016015798A (ja) 回転電機ステータ
CN111245164B (zh) 旋转电机及其制造方法
US20140001914A1 (en) Stator for an electric motor and method for producing a stator for an electric motor
US10454348B2 (en) Stator for rotating electrical machine
JP2017093072A (ja) 回転電機ステータ
CN110504780B (zh) 旋转电机
JP6853149B2 (ja) ステータ構造およびレゾルバ
JP2005168289A (ja) ステータアセンブリ
CN110571965B (zh) 旋转电机及其制造方法
EP3048704B1 (fr) Stator de machine électrique rotative
JP6852639B2 (ja) ステータ
JP2021111999A (ja) モータ
JP2020167843A (ja) 回転電機用ステータ
CN109672275B (zh) 定子构造以及旋转变压器

Legal Events

Date Code Title Description
NENP Non-entry into the national phase in:

Ref country code: DE

ENP Entry into the national phase in:

Ref document number: 1409961

Country of ref document: GB

Kind code of ref document: A

Free format text: PCT FILING DATE = 20121121

WWE Wipo information: entry into national phase

Ref document number: 1409961.8

Country of ref document: GB

122 Ep: pct app. not ent. europ. phase

Ref document number: 12797956

Country of ref document: EP

Kind code of ref document: A2