EP3357142A2

EP3357142A2 - Electric machine component and electric machine comprising at least one winding

Info

Publication number: EP3357142A2
Application number: EP16770783.5A
Authority: EP
Inventors: Michael NADERER; Nikolaus SCHWEINERT
Original assignee: Dynamic E Flow GmbH
Current assignee: Dynamic E Flow GmbH
Priority date: 2015-10-02
Filing date: 2016-09-27
Publication date: 2018-08-08
Also published as: CN108292873A; WO2017055246A2; KR102016040B1; WO2017055246A3; KR20180059919A

Abstract

The invention relates to an electric machine component (14) comprising at least one winding (U, V, W) for generating a magnetic field, the winding having at least one hollow conductor (3) with a casing (4) and an inner cavity (25), through which a coolant can be passed and said winding (U, V, W) having two ends (U1, U2,...,W1, W2), at which an electric supply voltage (L1, L2, L3, 0) is connected. According to the invention, the hollow conductors (3) are designed as round tubes and have an outer diameter ranging from 1.0 mm to 4 mm, the ends (U1, U2,...,W1, W2) of the winding (U, V, W) can act as a coolant inlet or coolant outlet, and said ends (U1, U2,..., W1, W2) of the winding (U, V, W) are connected to a connection piece (6) that comprises a coolant inflow (8) and/or a coolant outflow (9), multiple hollow conductor connections (7) for connecting hollow conductors (3), a distribution channel, via which the coolant is fed into at least one hollow conductor (3), and/or a collection channel into which the coolant emerging from at least one hollow conductor (3) flows and is conducted to the coolant outflow (9) of the connection piece (6).

Description

Electric machine component and electric machine with at least one

winding

The invention relates to an electrical machine component and an electric machine according to the preamble of the independent claims.

Electric machines, referred to hereinafter, include a winding made of a waveguide through which a coolant is passed to cool the electric machine. The waveguides used for the winding are usually made of an elongated tubular body or shell with an inner cavity, wherein the body is usually made of an electrically conductive material, such as. As copper, is made. The conductive body is usually coated on its outer surface with an electrically insulating material to achieve electrical insulation between adjacent waveguide pieces. The inner cavity is formed as a channel which extends through the entire waveguide in the longitudinal direction.

Various concepts for the hydraulic supply of waveguide windings of an electrical machine are known from the prior art. For example, z. For example, DE 10 2014 201 305 A1 discloses an electric motor having a stator with a plurality of waveguide coils each having a fluid inlet and a fluid outlet with respective ports. The individual waveguide coils are connected to a distributor or a collecting channel, via which the coolant is supplied or removed. A similar hydraulic supply concept is also known from DE 10 2013 205 418 A1, in which the individual hollow conductor coils also have a

common distribution or collection channel are connected to the cooling circuit. The concepts known from the prior art are relatively complicated and complicated. It is therefore an object of the present invention to provide an electric machine with at least one internally cooled winding whose hydraulic system is constructed much simpler and therefore faster and

can be produced more cheaply. This object is achieved according to the invention by the features specified in the independent claims. Further embodiments of

Invention will become apparent from the dependent claims.

According to the invention, an electric machine component is proposed, which comprises at least one internally cooled winding, which is formed from one or more waveguides through which a coolant is passed. The

Winding may comprise one or more coils and has two ends to which an electrical operating voltage is connected. According to the invention, the ends of the winding each serve as a coolant inlet or coolant outlet. The waveguides are round tube-shaped and have an outer diameter in a range of 1, 0 mm to 4 mm. The ends of the winding are connected to at least one connecting piece, which has a coolant inlet and / or a coolant outlet, a plurality

Waveguide connections for connecting waveguides, a distribution channel through which the coolant supplied from the coolant inlet in at least one

Waveguide is fed, and / or comprises a collecting channel, in which flows from at least one hollow conductor exiting coolant and the

Coolant outlet of the connector is passed. The connector also includes at least one electrical phase terminal to which an operating voltage can be applied, wherein the at least one phase terminal is in electrical connection with at least one of the waveguide terminals.

The above-mentioned connector may be in a minimum configuration z. B. include a coolant inlet, a plurality of waveguide terminals and a distribution channel through which the supplied coolant from the coolant inlet in

at least one waveguide is fed. A collection channel and a

additional coolant outlet are not provided in this minimum configuration. According to another minimum configuration, the connector z. B. a plurality of waveguide terminals, a collecting channel, in which the coolant exiting from the Holleitern flows into it, and having a coolant outlet, from which the coolant flows out. A distribution channel and an additional coolant inlet are not provided in this minimal configuration. A winding according to the invention preferably comprises a maximum of four, three or two internal coolant connections. In addition to the coolant connections to the Ends of the winding thus exist a maximum of four more, internal

Coolant connections for supplying and / or removing coolant.

A coolant connection can according to the invention z. B. serve as a fluid inlet or fluid outlet. A coolant port may also include both a fluid inlet and a fluid outlet. In the latter case, the fluid inlet and the fluid outlet may be integrated in a single component or provided in separate components. The term "coolant connection"

in this case designates a device with both connection types. Said internal coolant connection is preferably part of a

Connector, the multiple waveguide terminals for connecting

Waveguide ends and one or more coolant connections comprises.

According to a first embodiment, the connection piece merely produces a fluid connection between the waveguide ends of two successive partial windings and a coolant connection. It is preferably designed as a tee. Such a T-piece may in turn be connected via at least one waveguide with a second connector, on which z. B. the terminal-side ends of windings, or the ends of other waveguides of the coolant system, are connected. Such a second connecting piece preferably comprises a common coolant inlet and a common coolant outlet, a distributor channel via which the coolant is fed into the individual waveguides, and a collecting channel, into which the coolant emerging from the waveguides flows and is led to the coolant outlet of the connecting piece.

According to a second embodiment of the invention, the aforementioned T-piece is dispensed with, and the adjacent waveguide ends of serially successive partial windings are directly on one

common connection piece connected. Such a connecting piece preferably comprises a common coolant inlet and a common coolant outlet, a distributor channel via which the coolant is fed into the individual waveguides, and a collecting channel, into which the coolant emerging from the waveguides flows and is led to the coolant outlet of the connecting piece. The connector according to the invention preferably has a plurality of waveguide connections and at least one coolant line connection. Within the housing, a coolant distribution channel or a coolant collection channel is provided which communicates with at least one of the waveguide terminals. Optionally, the connector also both a

Coolant distribution channel and a coolant collection channel, wherein the coolant distribution channel is then separated hydraulically from the coolant collection channel.

The waveguide connections mentioned serve to connect the thin, tubular tubular waveguides, which have an outer diameter of 1, 0 mm to about 4 mm, preferably at most 3.2 mm or 2.5 mm. The

Coolant line connections serve to connect coolant lines, which generally have a larger cross-section than the waveguide connections. The coolant line connections are z. B. openings, which may have a cross-section or diameter of more than 4 mm or 5 mm.

A winding is preferably an entire one

Phase strand of an electrical machine, at the ends of an electrical supply voltage (electrical phase) is connected. A phase strand may consist of a single or optionally also of a plurality of waveguides electrically connected in series.

In a three-phase electric machine with three windings or

Phase strands, preferably, each of the windings is hydraulically connected to at least one connecting piece. Preferably, all waveguide ends are connected to the same connector. The windings are then supplied exclusively by the connection piece, which acts as a central distribution and collection element. The ends of a winding can either as a coolant inlet or

Coolant outlet can be used. In the course of a winding, one or more coolant branches or internal coolant connections can be provided, via which coolant can be supplied or removed. According to a specific embodiment of the invention is none

Coolant divider provided. In this case, the coolant is at a Fed to the end of the winding and discharged at the other end. The ends of the winding are then, as described above, at one or more

Connecting pieces connected.

According to another embodiment of the invention is within one

Phase strand provided at least one coolant branch, can be added or removed via the coolant. In this case, the ends of the phase string are again at one or more terminals

connected. The branch line (s) is or are preferably also connected to the same connector. Alternatively, they can also be connected to another connector.

According to a preferred embodiment of the invention, the connecting piece is designed such that it has a plurality of waveguide connections - optionally also for adjoining waveguide ends of serially successive partial windings of a phase strand - and preferably a common coolant inlet and a common coolant outlet

Distribution channel through which the coolant is fed into besimmte waveguide, and having a collecting channel, in which flows out of certain waveguides refrigerant flows into and to the coolant outlet of the

Connecting piece is passed.

In addition to a hydraulic connection, the connection piece preferably also establishes an electrical contacting of the waveguides connected thereto. Accordingly, the connector preferably has one or more

Phase terminals or terminals, on which or an operating voltage (electrical phase or 0) can be applied, wherein a phase connection is in each case in electrical connection with at least one of the waveguide terminals .. If a waveguide is attached to the connector according to the invention, thereby preferably a hydraulic connection and at the same time an electrical contacting of the waveguide.

Those waveguide terminals of the connection piece, on which the electrical phases (U, V, W and possibly also the neutral point of a star connection) of the electric machine are present, are preferably electrically insulated from one another. The connector can also have waveguide terminals that are not electrically isolated from each other, since they have the same potential have to. At these waveguide connections z. B. the ends of coils are connected, which are at a star circuit at the same potential, but also branch lines of a phase strand or internal ends of successive, serially connected partial windings, which are at the same electrical potential.

The fitting is preferably not along a circumference of

arranged electrical machine, for. B. not on a front side of the stator along the Statorumfangs. According to the invention that is or are the

Instead, fittings are arranged at a central location laterally on the electric machine, for. B. in a central region of the stator, laterally, at a distance from the stator. The connecting piece is preferably not curved, but preferably runs straight.

According to a preferred embodiment of the invention, a winding made of one or more waveguides, which are formed as a hollow wire.

The hollow wire or wires preferably have a round cross section or outer circumference. The outer circumference could also be like a circle, such. B. be oval. The outer circumference may in principle have the same or a different shape as the inner circumference.

The hollow wires preferably have an outer diameter of less than 10 mm, preferably less than 5 mm and in particular an outer diameter in the range between 1, 0 mm and 3.2 mm.

The fluid channel located in the waveguide preferably has a diameter or a maximum extent of less than 5 mm. The diameter or the maximum extent is preferably about 1 to 3 mm. A winding according to the invention preferably comprises a plurality of coils, such. B. multiple tooth coils or multiple coils of a distributed winding.

According to a first embodiment of the invention, a winding (U, V, W) is connected only at its ends to a coolant circuit. In this case, the winding has no internal coolant connection. One end of the coil serves as a coolant inlet and the other end serves as a coolant outlet. According to a second embodiment of the invention, a winding (U, V, W) comprises a plurality of coils and one or more internal coolant connections. The or the coolant connections are arranged so that the winding is divided into a plurality of partial windings, each comprising at least one coil. One or more of the partial windings may also each comprise a plurality of coils.

A coil preferably has one or more turns, e.g. B. more than 10, 20 or 30 turns.

The partial windings of a winding can in principle be flowed through in the same direction or in the opposite direction of coolant.

The winding of one phase may be made as a single winding having one or more waveguides electrically connected in series. Alternatively, however, a winding can also be designed as a parallel winding, in which one or more windings are electrically connected in parallel. The coils of the parallel windings may be physically parallel, i. it can z. B. two waveguides to be wound in parallel around one or more teeth. However, the coils of the parallel windings may also be physically non-parallel wound. For example, a coil of a first winding may be wound around a first tooth of an electric machine component, and a coil of the parallel winding may be wound around another tooth of the electric machine component. In an embodiment of an electrical machine component with several

Partial windings, each comprising a plurality of coils, the individual coils of a first partial winding are preferably arranged in opposite direction to the coils of a second partial winding on the component according to the invention. The term "direction" refers to the general direction of flow of the coolant through the respective part winding The hollow conductor coils of a first partial winding can be arranged, for example, in the clockwise direction and the hollow conductor coil in a second partial winding in the counterclockwise direction on the teeth or in the grooves of the component while in

flows through the coolant in the opposite direction. Each of the coils of a sub-winding has a ranking corresponding to the position of the respective coil in the series circuit. In a partial winding with a total of four coils, the individual coils z. 1, 2, 3 and 4. According to a particular embodiment of the invention, a coil of a first partial winding, which in terms of their ranking closer to a

Coolant inlet of the first part winding, and a coil of a second

Partial winding, which is arranged with respect to their ranking from the coolant inlet of the second part of the winding further away, preferably arranged adjacent to each other on the electrical machine component. You can z. B. on adjacent teeth. Coils closer to a coolant inlet are generally colder than coils further from one

Coolant inlet are located away. By arranging a colder coil next to a hotter coil can thus be prevented that thermal hot spots arise. According to a preferred embodiment of the invention, a coil of a first partial winding, which is arranged in order of priority next to a coolant inlet of the first part of the winding, and a coil of a second partial winding, with respect to their order of a

Coolant inlet of the second part of the winding is located furthest away, arranged adjacent to each other on the electrical machine component.

The electric machine component may in particular be a rotor or a stator.

The invention also relates to an electric machine with an electric machine component, which is constructed according to one of the aforementioned embodiments.

The electric machine can be a DC motor or an AC motor, in particular a three-phase electric machine or a generator.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described by way of example with reference to the accompanying drawings. Show it: Fig. 1 is a schematic view of a three-phase electric machine with Hohldrahtwicklungen;

Fig. 2 is an electrical and hydraulic circuit diagram of the machine of Fig. 1;

Fig. 3 is a schematic view of a delta connection with opposite

Flow through the individual windings;

4 shows a schematic representation of a connection piece for the individual coil ends of the delta connection of FIG. 3;

Fig. 5 is a schematic representation of a delta connection, in which the

individual windings are largely the same direction flowed through by coolant;

FIG. 6 shows a schematic illustration of a connection piece for the individual coil ends of the delta connection of FIG. 5; FIG.

Fig. 7 is a schematic representation of a parallel winding of two parallel delta circuits;

FIG. 8 shows a schematic representation of a connection piece for the individual coil ends of the parallel circuit of FIG. 7; FIG. Fig. 9 shows another embodiment of a parallel winding with two

Delta connections;

Fig. 10 is a schematic representation of a connector for all

Waveguide ends of the circuit of Fig. 9;

Fig. 1 1 another embodiment of a parallel winding with two

Delta connections;

Fig. 12 is a schematic representation of a connector for all

Waveguide ends of the circuit of Fig. 1 1; 13 shows a schematic illustration of a parallel winding in delta connection, in which each winding has an additional internal coolant connection;

Fig. 14 is a schematic illustration of a common terminal for all waveguide ends of the circuit of Fig. 13;

Fig. 15 is a schematic representation of a star connection, in which the individual windings are flowed through in the direction of the electrical terminals;

16 shows a schematic representation of a common connection piece for the waveguide ends of the individual windings of the star connection of FIG. 15; 17 is a schematic representation of a star connection, in which the individual windings are flowed through in the direction of the zero point;

FIG. 18 shows a schematic illustration of a common connection piece for the waveguide ends of the star connection of FIG. 17; FIG.

Fig. 19 is a schematic representation of a parallel winding in

Star connection, in which the individual windings of the first

Star connection and the corresponding windings of the second

Star circuit in opposite directions flowed through by coolant;

FIG. 20 shows a schematic illustration of a common connection piece for the waveguide ends of the parallel winding of FIG. 19; FIG.

Fig. 21 is a schematic representation of a parallel winding in

Star connection, in which the individual windings of the first

Star connection and the corresponding windings of the second

Star circuit to be flowed through the same direction of coolant;

FIG. 22 shows a schematic illustration of a common connection piece for the waveguide ends of the parallel winding of FIG. 21; FIG. FIG. 23 shows a schematic representation of a parallel winding with two parallel star circuits, in which the windings of the individual star circuits each have an internal coolant connection; FIG.

FIG. 24 shows a schematic view of a common connection piece for the waveguide ends of the parallel winding of FIG. 23; FIG.

Fig. 25 is a schematic representation of a stator of an external rotor motor with a special arrangement of tooth coils; Fig. 26 is a side view of a hollow wire according to a special

Embodiment of the invention;

Fig. 27 is a cross-sectional view of the hollow wire of Fig. 26; and FIG. 28 shows an electrical and hydraulic circuit diagram of a winding for a phase of a polyphase electric machine.

EMBODIMENTS OF THE INVENTION FIG. 1 shows a schematic view of a three-phase synchronous machine 10 with an inboard stator 14 and an outboard rotor (not shown). The electrical phases are designated L1, L2 and L3 or 0 and connected in star connection. The stator 14 here comprises six teeth 16 on which the individual windings U, V and W are arranged. The windings U, V, W each consist of a hollow wire 3, through which a coolant flows in order to cool the electric motor 10.

In the illustrated embodiment, each coolant is supplied to the waveguide ends of the individual windings U, V, W and at the neutral point 0. Each of the windings U, V, W further comprises an internal connection piece 20, which the respective winding U, V, W in two partial windings U01, U02; V01, V02; W01, W02 divided. Each partial winding comprises exactly one coil, which is arranged on a respective tooth 16 of the rotor 14. The fittings 20 are T-pieces in the present case, each providing a coolant outlet. The synchronous machine shown in Fig. 1 further comprises a cooling system with a coolant pump 17 and a heat exchanger 18. The pump 17 pumps coolant through various coolant lines 19 to the phase-side ends of the windings U, V, W, and the neutral point 0, where the coolant in the windings U, V, W enters. The coolant then flows in each case through the individual partial windings U01,... W02 and via the connecting pieces 20 in the direction of the heat exchanger 8, where it is cooled and flows back to the pump 17.

The electrical and hydraulic circuit diagram of the synchronous machine of Fig. 1 is shown schematically in Fig. 2. The arrows 1 1 indicate a

Coolant input and the arrows 12 a coolant outlet. The

Coolant connections of the individual connecting pieces 20 are each designated by the reference numeral 5.

In the exemplary embodiment illustrated, all the coolant connections 5 serve as coolant outlets 12. In the case of a polyphase electrical machine having a plurality of phase windings (eg U, V, W), the individual windings U, V, W can, in principle, be flowed through in any direction by coolant. It is up to the skilled person to choose the arrangement of the individual waveguide coils and the flow direction so that the best possible cooling is achieved.

3 shows a schematic view of a delta connection, in which the individual windings are flowed through in opposite directions. In this case, "counteracting" means that the winding ends (for example, U1) connected to a specific electrical phase (eg, L1) In the example shown, the waveguide end U1 is a coolant outlet 12 and the waveguide end W2 is a coolant inlet 11. The flow direction, as can be seen, is also in the opposite direction at the other phase connections L2 and L3 a schematic representation of a connector 6 for all waveguide ends (IM, W2) of the individual windings U, V, W. The

Connecting piece 6 has a common coolant inlet 8 and a common coolant outlet 9. The coolant supplied to the coolant inlet 8 is conducted via a distributor to the individual waveguide ends U2, V2, W2, where it enters the respective winding U, V, W. The am

opposite end V1, W1, U1 exiting coolant is in one Sannnnelkanal sannnnelt and the common output 9 of the connector 6 is supplied. In Fig. 4, the inflow of coolant is represented by arrows which are directed from the respective waveguide end U1, W2 to the outside, and the outflow of coolant is represented by arrows pointing to the respective waveguide end U1, W2.

5 and 6 show a delta connection or a connecting piece 6, in which the flow direction is substantially the same. "In this case" "parallel" means that the coolant is in each case connected to at least two of the three phase connections L1, L2, L3 only flows out or only flows in. The

Flow direction is again shown by arrows.

Fig. 7 shows a schematic representation of a parallel winding of two parallel delta circuits, in which the windings U, V, W of a first delta connection and the corresponding windings IT, V, W of a second delta connection are electrically connected in parallel. As can be seen from the illustrated arrows, the first delta circuit A is in opposite directions and the second delta circuit B also flows in opposite directions of coolant.

In addition, the flow direction in a winding U, V, W of the first

Delta connection A always opposite to the direction of flow in the parallel

Winding IT, V, W of the second delta connection A i

An associated connector 6 is shown in Fig. 8.

Fig. 9 shows a parallel winding similar to Fig. 7, in which the individual

However, triangular circuits are flowed through in the same direction. The

However, the flow direction of the first delta connection A is opposite to the flow direction of the second delta connection B. At each phase point of the delta circuits A, B, coolant thus flows into two waveguide ends and out of two waveguide ends. The associated connector 6 is shown in Fig. 10.

Fig. 1 1 shows a parallel winding, similar to Fig. 9, in which the two

Triangle circuits A, B are each flowed through in the same direction. The

Flow direction through the individual windings U, V, W of the first

Delta circuit A is in the same direction as the flow direction through the respective parallel windings IT, V, W of the second delta connection B. The associated connector is shown in Fig. 12.

13 shows a parallel winding of two parallel-connected delta-type circuits, in which each of the windings U, IT W, W has an internal coolant connection 5 in the form of a T-piece 20, whereby the

Windings U ... W, U '... W are divided into two partial windings U01, U02 ... W01, W02. In the case of the delta connection shown on the left, in each case coolant is supplied to the phase-side waveguide ends U1, U2... W1, W2 and discharged to the coolant connections 5 or Ut1, Ut2... Wt1, Wt2 of the connection pieces 20. In the case of the delta connection shown on the right, it is exactly the opposite.

Fig. 13 shows connectors 20 in the form of T-pieces. However, these are not absolutely necessary, because the adjacent ends of two series successive partial windings U01, U02 ... W01, W02 can, for. B. also be connected directly to a common connector 6.

14 shows a schematic representation of an associated connection piece 6 for the individual coolant connections 7. In the present case, all the waveguide ends U1, U2... W1, W2, Ut1, Ut2... Wt1, Wt2 of the circuit are on

Connector 6 connected. Alternatively, but could also less

Connections 7 may be provided. The waveguide ends U1, U2 ... W1 could z. B. at a first connector 6 and the waveguide ends Ut1, Ut2 ... Wt1, Wt2 z. B. be connected to a second connector 6. Various hydraulic flow schemes for a star connection are shown in Figs. FIGS. 15 to 18 relate to a simple winding and FIGS. 19 to 24 to a parallel winding. The

Flow direction of the coolant is indicated by arrows and is self-explanatory.

FIG. 25 shows a schematic view of a stator 14 of an electric machine 10, on whose outer circumference a number of teeth 16 are provided. For clarity, only the winding diagram of one of the windings (here U) is shown here. The winding U here comprises a total of eight coils S1 -S4, which are each arranged on one of the teeth 16. Four of the

Coils S1 -S4 belong to a first partial winding U01, and another four coils to a second sub-winding U02. The two partial windings U01, U02 are electrically connected in series and form a winding U.

The serially connected coils S1 -S4 each partial winding U01, U02 are each offset by 90 °. The end U01 _{1 of} the winding U is connected to the phase L1, and the other end U02 ₂ at the neutral point 0. In addition, the individual coils S1 -S4 of the two partial windings U01, U02 are arranged such that the coolant flows in the opposite direction through the partial windings U01, U02. With respect to the first partial winding U01 ₁ coolant is supplied at the waveguide end U01 and ₂ discharged coolant at the waveguide end UOI. With respect to the second partial winding U02 coolant is supplied at the waveguide end U02i and on

Waveguide end U02 ₂ Coolant removed. The individual coils S1 -S4 of the two partial windings U01, U02 are arranged on the circumference of the stator 14 so that the coolant flows in the opposite direction through the partial windings U01, U02.

In addition, a coil (eg S1), which is located closer to the coolant inlet 1 1 of the associated part winding (U01), is arranged immediately adjacent to a coil (eg S4) of the other part winding (U2), which is farther from the Coolant inlet 1 1 of the second partial winding (U02) is removed. As a result, a thermally cooler coil (S1) is arranged next to a thermally hot coil (S4), so that no thermal hotspots are produced at the stator 14. In the enlarged view of two teeth 16 shown on the right, it can also be seen that the direction of winding in adjacent teeth 16 is preferably in opposite directions, so that a north pole N and a south pole S are formed.

Fig. 26 shows a schematic side view of a hollow wire 3, as it can be used to produce a winding U, V, W. The hollow wire 3 has a jacket 4 with an inner cavity 25, which forms a longitudinally continuous fluid channel.

In Fig. 27 it can be seen that both the jacket 4 and the cavity 25 have a round cross-section. The cross-sectional shape of shell 4 and cavity 25th could also be different, z. Round and square or oval and angular, etc ..

Finally, FIG. 28 also shows an electrical and hydraulic circuit diagram of the winding U of FIG. 25. The winding U has an internal cowl middle connection 5 which divides the winding into two partial windings U01, U02, each having four coils S1-S4. By parallel lines 21 is indicated in each case which of the coils S1 - S4 of the individual partial windings U01, U02 are arranged adjacent. The flow direction of the coolant is again indicated by arrows 1 1, 12, wherein 1 1 denotes a coolant outlet and 12 a coolant inlet. The flow direction could also be chosen differently. Of the

Coolant connection 5 here provides both a coolant inlet 1 1 and a coolant outlet 12 and is part of a connection piece 6 (common connection piece with distributor and collecting channel) or 20 (T piece). Alternatively, the coolant inlet 1 1 and the coolant outlet 12 could of course also be provided on separate connecting pieces.

The skilled person is clear that he by a variation of various parameters, such as. B. the number of coolant connections 5, the partial windings U01, U02, the number of individual coils S1 -S4 per partial winding U01, U02, the

Flow direction of the coolant or the physical arrangement of the individual coils S1 -S4 on the electric machine component 14 various other

Can produce embodiments that also the basic principle of

realize present invention. The illustrated in the figures

Embodiments represent only a limited number of examples of possible embodiments.

Claims

claims

Electric machine component (14) having at least one winding (U, V, W) for generating a magnetic field comprising at least one waveguide (3) having a jacket (4) and an internal cavity (25) through which Coolant is conductive, wherein the winding (U, V, W) has two ends (U1, U2, ..., W1, W2), where an electrical

Operating voltage (L1, L2, L3, 0) is connected, thereby

marked that

- The waveguide (3) are round tube-shaped and a

Outer diameter in a range of 1, 0 mm to 4 mm,

- The ends (U1, U2, ..., W1, W2) of the winding (U, V, W) each as

Coolant inlet or coolant outlet serve, and that

- The ends (U1, U2, ..., W1, W2) of the winding (U, V, W) on a

Connecting piece (6) are connected, the one coolant inlet (8) and / or a coolant outlet (9), a plurality of waveguide terminals (7) for connecting waveguides (3), a distribution channel through which the coolant in at least one waveguide (3) fed is, and / or comprises a collecting channel, in which the at least one waveguide (3) exiting coolant flows into and to the coolant outlet (9) of

Connecting piece (6) is passed.

2. electrical machine component (14) according to claim 1, characterized in that the connecting piece (6) at least one electrical

Phase terminal (L1, L2, L3, 0), to which an operating voltage can be applied, wherein the phase connection (L1, L2, L3, 0) is in electrical connection with at least one of the waveguide terminals (7).

3. electrical machine component (14) according to claim 1 or 2, characterized

characterized in that at least two of the waveguide terminals (7) are electrically isolated from each other.

Electric machine component (14) according to claim 1 or 2, characterized

characterized in that the winding (U, V, W) has no internal

Having coolant connection (5).

Electric machine component (14) according to claim 1 or 2, characterized

characterized in that the winding (U, V, W) comprises a plurality of coils (S1 -S4) and one or more internal coolant connections (5) arranged such that the winding (U, V, W) in several

Partial windings (U01, ..., W02) is divided, each comprising at least one coil (S1 -S4).

Electric machine component (14) according to claim 5, characterized in that at least one of the partial windings (U01 W02) comprises a plurality of coils (S1 -S4).

Electric machine component (14) according to claim 5 or 6, characterized

in that the individual partial windings (U01, ..., W02) are each a component of various coolant circuits through which coolant flows in the same direction or in the opposite direction.

Electric machine component (14) according to one of the preceding claims, characterized in that the winding (U, V, W) comprises a plurality of coils (S1 - S4).

Electric machine component (14) according to one of the preceding claims, characterized in that the waveguide (3) has an outer diameter of less than 10 mm, in particular about 1 mm to 3.5 mm Electric machine component (14) according to any one of the preceding claims, characterized in that a connecting piece (6) is provided, on which the adjoining hollow conductor ends of serially

successive part windings are directly connected ,. 1 1. Electric machine component (14) according to one of the preceding claims, characterized in that the ends (U1, U2, ..., W1, W2) of all

Windings on a single common connector (6)

are connected. 12. electrical machine component (14) according to claim 5, characterized in that serially connected coils (S1 -S4) of a partial winding (U01, ..., W02) each have a ranking that the position of the respective coil (S1 -S4 ) in the series circuit, and that a coil (S1) of a first partial winding (U01, ..., W02), with respect to their ranking closer to a coolant inlet (1 1) of the first partial winding (U01, ..., W02) , and a coil

(S4) of a second partial winding (U01 W02) which is arranged with respect to their order of a Kühlmitteileinlass (1 1) of the second partial winding (U01, ..., W02) farther on the electric machine engine component (14) are arranged adjacent to each other.

13. electrical machine component (14) according to claim 12, characterized in that said coils (S1 -S4) on adjacent teeth (13) of the electric machine component (14) are arranged. 14. electrical machine component (14) according to claim 12 or 13, characterized

characterized in that a coil (S1 -S4) of a first part winding (U01, ..., W02), which is arranged in order of priority next to a coolant inlet (1 1) of the first part winding (U01 W02), and a coil ( S4) of a second sub-winding (U01, ..., W02), which is arranged with respect to their ranking from a Kühlmitteileinlass (1 1) of their part winding (U01, ..., W02) farthest on the electric machine component (14) are arranged adjacent to each other.

15. Elektronnasch ine (10) with an electrical machine component (14) according to any one of the preceding claims.