Patent Description:
An electrical machine generally comprises a stator having at least one winding which, in the operation of the electrical machine, is actuated by means of a control device. To this end, a busbar device having at least one pin can be employed. The pin customarily constitutes an electrical connection with the control device, and is electrically connected to a terminal of the busbar device, which is electrically connected to at least one associated winding of the stator.

In numerous applications, in particular involving the use of the electrical machine in wet and/or humid environments, it is desirable for the electrical connections of the electrical machine with the control device to be executed in a fluid-tight manner. To this end, it is conceivable for the control device, the stator and the busbar device to be arranged in a common housing. Within the housing, the busbar device can be fitted to an axial end face of the stator. Busbar devices of this type customarily comprise a carrier, which is fastened to the end face of the stator, and from which pins project on the side which is averted from the stator, in order to engage with associated receptacles in the control device, thus forming an electrical connection with the control device. In order to permit a reliable electrical connection of the respective pin with the associated receptacle and the control device, it is necessary for the busbar device and/or the control device to be manufactured with very stringent tolerances. This complicates the manufacture and assembly of the electrical machine.

<CIT> shows an electric motor with a stator and a busbar device. The busbar device has a lower busbar and an upper busbar each with a carrier. The lower busbar is axially attached to the stator and the carrier of the upper busbar is attached to a housing of the electric motor.

<CIT> relates to an electric motor with a stator. The motor comprises and a first support member and an axially neighbouring second support member. Both support members rest on the stator.

The object addressed by the present invention is therefore the disclosure of an improved, or at least an alternative, form of embodiment of an electrical machine of the above-mentioned type, which is in particular characterized by simplified manufacture and/or simplified assembly, with a reliable electrical connection between the busbar device and the control device.

According to the invention, this object is fulfilled by the subject matter of the independent claim <NUM>. Advantageous forms of embodiment are the subject matter of the dependent claims.

The present invention is based upon the general concept whereby a carrier of a busbar device of an electrical machine which is arranged on an end face of a stator is only attached to the stator at an attachment section. Conversely, a connector section of the carrier is detached, in particular loose, from the stator, wherein a connector of the busbar device is arranged on the connector section, for the constitution of an electrical connection with a control device of the electrical machine. Accordingly, notwithstanding the attachment of the carrier to the stator, a relative movement of the connector vis-à-vis the stator is possible, by means of the connector section of the carrier. As a result of the potential relative movement of the at connector vis-à-vis the stator, the connector, upon connection with the control device, in particular upon the insertion thereof with an associated counter connector in the control device, is mobile or movable, thereby permitting a simplified assembly of the electrical machine. Moreover, in this manner, both the busbar device and the control device can be manufactured with greater tolerances, such that the manufacture of the electrical machine is simplified. Moreover, the relative mobility of the connector vis-à-vis the stator permits the reliable maintenance of the electrical connection of the pin with the control device, notwithstanding the permissible tolerances and the simplification of assembly.

In accordance with the concept of the invention, the electrical machine comprises the stator. The stator comprises at least one winding, and extends, in particular in a hollow cylindrical shape, in an axial direction, and runs in a circumferential direction. The electrical machine further comprises the busbar device, the function of which is the electrical connection of the at least one winding of the stator to the control device of the electrical machine. The busbar device comprises the carrier and the connector. The function of the connector of the busbar device is the constitution of an electrical connection with the control device. In particular, the connector is in insertion with an associated counter connector of the control device. The carrier of the busbar device is arranged on an axial end face of the stator, and extends both radially and in a circumferential direction. According to the invention, the carrier comprises an attachment section and a connector section. The connector section, in a first direction which runs transversely to the axial direction, is joined to the attachment section. The attachment section is thus attached to the stator. Conversely, the connector section is detached from the stator. The connector is arranged on the connector section. In particular the connector is mechanically fitted to the connector section.

The connector preferably projects on the side of the connector section which is averted from the stator.

The control device is appropriately arranged on the side of the connector which is averted from the stator.

The connector or the counter connector is appropriately a male connector with at least one projecting pin. Consequently the other connector is a female connector with a corresponding receptacle for each pin. The female connector is hence in particular a socket. It is thus possible for the electrical connection between the busbar device and the control device to be formed in a simple and reliable manner by means of a plug-in connection.

Preferably the connector of the busbar device is a male connector with at least one pin. The counter connector of the control device is thus a female connector, which, for the respective at least one pin, advantageously comprises an associated receptacle, in which the associated pin is accommodated, and in particular is inserted, in order to constitute an electrical connection with the control device.

The electrical machine appropriately comprises a housing, in which the stator, the busbar device and the control device are accommodated, and is advantageously fluidically sealed, and in particular closed, vis-à-vis the exterior.

The housing of the electrical machine preferably comprises an inner wall, which is advantageously oriented radially in a circumferential direction, and which separates a first chamber, in which the stator is arranged, from a second chamber, in which the control device is arranged. The carrier is appropriately arranged in the first chamber. The inner wall appropriately incorporates a passage, through which the connector is fed.

The electrical machine appropriately comprises a rotor, which is advantageously arranged within the stator, and which cooperates with the stator in a known manner.

In each case, the directions indicated herein refer in particular to the axial direction, which can correspond to an axis of the rotor. The radial direction, or the term "radial", thus means transverse to the axial direction. The circumferential direction runs about the axial direction.

The electrical machine can be any desired electrical machine. In particular, the electrical machine can be of a type which is employed in humid and/or wet environments.

The electrical machine can in particular be an electrical machine of a temperature-control device and/or an air-conditioning installation. In particular, the electrical machine is a compressor of an air-conditioning installation. In electrical machines of this type, which are employed in humid or wet environments, electrical connections are sealed vis-à-vis the humid and/or wet environment. At the same time, a reliable electrical connection of the busbar device to the control device simplifies the assembly and manufacture of the electrical machine.

Advantageously and appropriately, the carrier is electrically insulating. In particular, this means that the carrier, in the operation of the electrical machine, does not constitute any electrical connection between the connector, in particular between the at least one pin, and the respective winding and/or between the connector, in particular between the at least one pin, and the control device.

In preferred forms of embodiment, the connector section of the carrier is formed of a flexible, in particular of an elastic substance or material. Forms of embodiment are preferred, in which the connector section is formed of a flexible, in particular of an elastic, plastic. The flexibility of the connector section per se is such that a greater relative movement of the connector vis-à-vis the stator and vis-à-vis the control device is possible. Consequently, in the manufacture of the busbar device, the stator, the control device and the housing, greater tolerances are possible. This therefore results in a further simplification of the manufacture and assembly of the electrical device.

It is conceivable for the entire carrier to be manufactured from plastic. The carrier can thus be provided in a simple and cost-effective manner.

The carrier is preferably manufactured by a moulding method, in particular by an injection-moulding method. The carrier is thus advantageously an injection-moulded part, in particular an injection-moulded plastic part.

In preferred forms of embodiment, the connector section comprises at least one axially open recess. The recess extends transversely to the axial direction, and with a transverse or inclined orientation to the first direction. As a result of the recess, the connector section thus incorporates localized thinning, and is axially open. In consequence, the connector section is movable relative to the attachment section in a more effective and damage-free manner. Accordingly, relative movements of the connector section to the attachment section about a pivoting axis which runs along the recess and/or relative movements of the connector section to the attachment section about a radially-oriented axis of rotation are possible. A recess of this type thus functions in the manner of an articulated joint, about which the connector section is movable relative to the attachment section. This, in turn, results in a further simplification of the manufacture and assembly of the electrical machine, forming a reliable electrical connection with the control device.

The attachment section advantageously incorporates no such recesses, and is thus free of recesses.

In principle, the respective recess can be axially open on one side only.

Forms of embodiment are preferred in which at least one of the at least one recesses is axially open on both sides. This means that the recess is axially open on the side facing the stator, and on the side which is averted from the stator. The recess thus comprises two axially-open openings, also described hereinafter as recess openings, averted from one another. The connector section is appropriately thinned between the two recess openings. A recess of this type permits a simplified relative movement of the connector section about the associated pivoting axis and/or about the axis of rotation, in both pivoting directions. The manufacture and assembly of the electrical machine are further simplified accordingly.

In principle, the at least one respective recess can extend over any desired lower section of the connector section.

Forms of embodiment are preferred in which at least one of the at least one recesses, advantageously the respective recess, extends over the entire connector section. This means that at least one of the at least one recesses extends, transversely to the axial direction and with a transverse or inclined orientation to the first direction, over the entire connector section. This results in the improved mobility of the connector section relative to the attachment section, with a consequent simplification of the manufacture and assembly of the electrical machine.

In principle, the connector section can comprise only one such recess.

Forms of embodiment are also conceivable in which the connector section comprises two or more such recesses, which are spaced from one another in the first direction.

The connector section advantageously extends beyond the at least one pin. This means that the connector section occupies a larger region of the carrier than the region in which the at least one pin is arranged.

The connector section advantageously extends, in the circumferential direction, over at least <NUM>°, and preferably over at least <NUM>°, wherein an extension over at least <NUM>° is particularly preferred. Advantageously, the connector section further extends, in the circumferential direction, over less than <NUM>°, and preferably over less than <NUM>°. In particular, the connector section extends between <NUM>° and <NUM>° in the circumferential direction.

The respective pin can be arranged, as required, relative to the attachment section, and mechanically fitted to the connector section.

Forms of embodiment are advantageous in which the connector, in particular at least one of the pins, advantageously the respective pin, is arranged in opposition to the attachment section, in the first direction. As this is the region of the maximum relative mobility of the connector section vis-à-vis the attachment section, such an arrangement of the at connector results in the maximum mobility of the connector relative to the stator. In this manner, the manufacture and assembly of the electrical device is simplified accordingly. In particular, the connector, in particular the at least one pin, is arranged in distal and/or diagonal opposition to the attachment section.

Forms of embodiment are preferred in which the connector comprises a jacket having an opening which opens on the side which is averted from the stator, also described hereinafter as the jacket opening. The jacket opening of the connector is at least partially closed by at least one seal. The seal encloses at least one pin in the jacket, in particular in the jacket opening. The pin, which projects from the jacket opening, is thus at least partially enclosed by the seal in the region of the jacket opening. The seal permits the execution of a sealing function by the connector, to the exterior of the at least one pin.

Analogously, the counter connector of the control device can comprises a jacket having an opening which opens on the side facing the stator. If the counter connector is the male connector having at least one pin, the opening of the counter connector is preferably at least partially closed by at least one seal. The seal encloses at least one pin in the jacket, in particular in the opening. The pin, which projects from the opening, is thus at least partially enclosed by the seal in the region of the opening. The seal permits the execution of a sealing function by the counter connector, to the exterior of the at least one pin.

Forms of embodiment are preferred in which the connector, by means of a corresponding connection, in particular by means of at least one screw connection, is mechanically loaded in the direction of the control device. This means that, upon the assembly of the electrical machine, a corresponding connection, for example at least one screw connection, mechanically loads the connector in the direction of the control device. Accordingly, the seal is also loaded and pressurized in the direction of the control device. A simple and reliable seal is produced as a result.

The connection which loads the connector in the direction of the control device can in particular comprise at least one screw connection. The at least one screw connection can be configured as required. In particular, it is conceivable for the connector to incorporate a bushing, through which an associated screw is fed and mechanically loads the connector in the direction of the control device.

According to preferred forms of embodiment, the connector is axially spaced from the stator. In particular, on the side of the connector which faces the stator, a projecting limit stop is provided, which prevents any direct contact of the connector, in particular the at least one pin, with the stator, in particular with the at least one winding.

Forms of embodiment are preferred in which the busbar device, for at least one electrical connection of the connection to the control device, in particular for at least one of the at least one pins of the connector, comprises a respectively associated terminal, which is spaced from the connector and projects from the carrier. By means of the respective terminal, an electrical connection is constituted with an associated mating terminal of the stator, for the electrical connection of the stator, in particular the respective winding, to the control device via the busbar device. The busbar device, for the respective electrical connection of the connection to the control device, in for the respective pin of the connector, and the associated terminal, comprises an associated electrical conductor, which electrically connects the associated electrical connection of the connection to the control device, in particular the associated pin to the associated terminal. The conductor is arranged within the carrier, and is enclosed by the carrier. The respective conductor is thus routed within the carrier. In particular, the respective conductor is encapsulated in the carrier. This permits the simple and cost-effective production of the busbar device, and the reliable mutual electrical isolation of the various pins, terminals and conductors.

The respective conductor is preferably configured with a flat profile. In particular, the respective conductor is configured with a flat profile at least in the connector section. For example, at least one of the at least one conductors is a plate or a plate-like structure. As a result, the conductor, upon the relative movement of the connector section vis-à-vis the attachment section, can be moved in a simple and non-destructive manner, such that an electrical connection between the connector, in particular the pin, and the terminal, and thus between the control device and the at least one winding, continues to be reliably maintained.

The respective terminal of the busbar device can be arranged as desired.

Forms of embodiment are advantageous in which at least one of the at least one terminals, preferably the respective terminal, projects from the attachment section. In particular, the at least one terminal projects radially from the attachment section.

A simple electrical connection is thus possible between the respective terminal and the associated mating terminal of the stator.

In principle, the mail connector, that is the connector or the counter connector, can comprise only one such pin.

Forms of embodiment are preferred in which the male connector, n particular the connector of the busbar device, comprises at least two, and in particular three such pins. One terminal and one conductor are advantageously assigned to the respective pin.

Forms of embodiment are preferred in which the terminals assume a distributed arrangement in the circumferential direction. A clear separation of the terminals is thus provided and, consequently, a simplified assembly of the electrical machine.

In principle, the attachment of the attachment section to the stator can be executed as desired.

Forms of embodiment are preferred in which the attachment section comprises at least two connection means, which are mutually spaced in the circumferential direction, each of which cooperates with an associated mating connection means of the stator, in order to constitute a mechanical connection between the attachment section and the stator, and thus to attach the attachment section to the stator. This means that the stator, for the respective connection means, comprises an associated mating connection means which, in combination with the associated connection means, constitutes a mechanical connection.

Both form-fitted and materially bonded connections with the respective connection means and the associated mating connection means are conceivable. In particular, the respective connection means and the associated mating connection means can be adhesively bonded, welded, soldered or screwed together, or can constitute an adhesive bond, a welded connection, a soldered connection or a screw connection. Naturally, combinations of these connections are also possible.

The terminals and the associated mating terminals are advantageously arranged in the circumferential direction between the connection means and the mating connection means. The manufacture and assembly of the electrical machine are simplified accordingly.

The carrier preferably assumes a flat design in the axial direction. This means that the carrier is preferably configured to a disc-shaped or annular shape. In particular, the carrier is a disc ring, which can be configured in annular segments. The flat design of the carrier results in a simplified relative movement of the connector section vis-à-vis the attachment section.

Further significant characteristics and advantages of the invention proceed from the sub-claims, the drawings and the associated description of the figures, with reference to the drawings.

It is understood that the above-mentioned characteristics, and those to be described hereinafter, are not only applicable in the respective combination indicated, but also in other combinations, or in isolation, without departing from the scope of the present invention, which is defined by the appended claims.

Preferred exemplary embodiments of the invention are represented in the drawings and described in greater detail in the following description, wherein identical reference numbers identify identical, similar or functionally equivalent components.

In the figures, schematically in each case:.

An electrical machine <NUM>, as represented in <FIG>, can be a constituent of an air-conditioning installation <NUM>, in particular in a motor vehicle <NUM>. The electrical machine <NUM> can be a compressor <NUM> for the compression of a coolant in a circuit <NUM> of the air-conditioning installation <NUM>. In the circuit <NUM>, in addition to the electrical machine <NUM>, a condenser <NUM> for the condensation of the coolant, an expander <NUM> for the expansion of the coolant, and a vaporizer <NUM> for the vaporization of the coolant can be incorporated. An air flux <NUM> indicated in <FIG>, which is fluidically isolated from the coolant, can flow through the vaporizer <NUM>, and can flow thereafter into an interior space <NUM>, for the purposes of cooling.

<FIG> shows a simplified section through the electrical machine <NUM>. The electrical machine <NUM> accordingly comprises a housing <NUM> which, in the exemplary embodiment represented, delimits a first chamber <NUM> and a second chamber <NUM>. Within the housing <NUM>, the chambers <NUM>, <NUM> are mutually separated by an inner wall <NUM>. In the first chamber <NUM>, a stator <NUM> of the electrical machine <NUM> and an unrepresented rotor, which cooperates with the stator <NUM>, are arranged. In the second chamber <NUM>, a control device <NUM> is arranged, by means of which the stator <NUM> is electrically supplied and controlled in service. The electrical machine <NUM> further comprises a busbar device <NUM>, which comprises a carrier <NUM> and a connector <NUM> for electrical connection with the control device <NUM>. The connector <NUM> engaged with a corresponding connector <NUM> of the control device <NUM>, also referred to a counter connector <NUM> in the following. In the shown exemplary embodiment, the connector <NUM> comprises at least one electrically conductive pin <NUM>. The counter connector <NUM>, for each pin <NUM>, comprises a corresponding receptacle <NUM>. The carrier <NUM> is arranged, in an axial direction <NUM>, on an outer end face <NUM> of the stator <NUM>, and in the first chamber <NUM>. The inner wall <NUM> incorporates a passage <NUM>, through which the at least one pin <NUM> is fed into the second chamber <NUM>, is inserted in the corresponding receptacle <NUM> in the control device <NUM>, and is thus electrically connected to the control device <NUM>.

<FIG> and <FIG> respectively show an isometric view of the stator <NUM> and the busbar device <NUM>, wherein <FIG> shows an exploded representation. <FIG> show different side views, and <FIG> shows an overhead view of the busbar device <NUM>. <FIG> shows an isometric view of the busbar device, in which the carrier <NUM> is represented as transparent. <FIG> shows an isometric interior view of the electrical machine <NUM>, in the region of the second chamber <NUM> and on the inner wall <NUM>.

According to the figures, the stator <NUM> comprises at least one winding <NUM>. In the exemplary embodiment represented, the stator <NUM> comprises a total of three different windings <NUM>, each of which corresponds to one phase, and arranged one after another in a circumferential direction <NUM>. The circumferential direction <NUM> is considered in relation to the axial direction <NUM>, and is thus oriented about the axial direction <NUM>. The stator <NUM> represented thus comprises first windings 24a, second windings 24b and third windings 24c. The first windings 24a, the second windings 24b and the third windings 24c are respectively electrically interconnected. The first windings 24a, the second windings 24b and the third windings 24c can each be differentially actuated by the control device <NUM>. By means of the windings <NUM>, the stator <NUM>, in service, generates an alternating magnetic field, which induces a rotation of the rotor. In an alternative variant, the rotor, in service, might generate a field in the windings <NUM>, which can be tapped off by the control device in the form of an electric voltage.

As can in particular be seen from <FIG>, the stator <NUM> assumes a hollow cylindrical shape, and thus extends in a circumferential direction <NUM> and in an axial direction <NUM>. The carrier <NUM> of the busbar device <NUM> extends transversely to the axial direction <NUM>, and thus extends both radially and in the circumferential direction <NUM>. In the exemplary embodiments represented, the carrier <NUM> is configured in the shape of a disc ring, and incorporates a central opening <NUM> which is aligned with the hollow space <NUM> of the stator <NUM>, also described hereinafter as the carrier opening <NUM>. The carrier <NUM> is preferably formed of a plastic, for example by injection-moulding. Accordingly, the carrier <NUM> is in particular an injection-moulded plastic part <NUM>. The carrier <NUM> comprises an attachment section <NUM> and a connector section <NUM> joined to the attachment section <NUM> (c. in particular <FIG>). The attachment section <NUM> is attached to the stator <NUM> whereas, conversely, the connector section <NUM> is detached from the stator <NUM>. The connector <NUM> of the busbar device <NUM> is arranged on the connector section <NUM>, in particular mechanically fitted to the connector section <NUM>, and projects from the connector section <NUM> on the side which is averted from the stator <NUM>.

As can in particular be seen from <FIG>, the connector section <NUM>, in a direction <NUM> which runs transversely to the axial direction <NUM>, also described hereinafter as the first direction <NUM>, connects to the attachment section <NUM>. Moreover, the connector section <NUM> also connects to the attachment section <NUM> in the circumferential direction <NUM>, on both sides. The carrier <NUM> is configured with a flat profile, and thus, in the axial direction <NUM>, comprises an extension which corresponds to a maximum of <NUM>/<NUM>th or <NUM>% of the radial extension of the carrier <NUM>. In the exemplary embodiment represented, the attachment section <NUM> extends over <NUM>° in the circumferential direction <NUM>. The same applies, correspondingly, to the connector section <NUM>, which extends over <NUM>° in the circumferential direction <NUM>. Accordingly, the connector section <NUM> and the attachment section <NUM> respectively comprise one half of the carrier <NUM> in the circumferential direction <NUM>.

The connector section <NUM> can comprise at least one axially open recess <NUM>, which runs transversely to the axial direction <NUM>, and with an inclined or transverse orientation to the first direction <NUM>, in the examples represented, transversely to the first direction <NUM>. The carrier illustrated <NUM> comprises two such recesses <NUM>, which are spaced from one another transversely to the axial direction <NUM>, and with an inclined or transverse orientation to the first direction <NUM>, in the exemplary embodiment represented, transversely to the first direction <NUM>. The respective recess <NUM> in the exemplary embodiment illustrated extends transversely to the axial direction <NUM>, and transversely to the first direction <NUM>, over the entire connector section <NUM>. The respective recess <NUM> in the exemplary embodiment illustrated, as can be seen, for example, in <FIG>, is axially open on both sides. This means that the respective recess <NUM> comprises two axially open openings <NUM>, also described hereinafter as recess openings <NUM>, which are averted from one another and between which the connector section <NUM> is recessed or thinned. The respective recess <NUM> thus functions in the manner of an articulated joint, which permits a pivoting of the connector section <NUM> relative to the attachment section <NUM> about a pivoting axis <NUM> which runs through the respective recess <NUM>. In the exemplary embodiment represented, a first of the recesses 32a runs perpendicularly to the axial direction <NUM>, and thus intersects with the axial direction <NUM>. The other, or second recess 32b is arranged in the first direction <NUM>, on the side of the first recess 32a which is averted from the attachment section <NUM>, and with a spacing to the latter. A first pivoting axis 34a is thus oriented through the first recess 32a and intersects with the axial direction <NUM>. A second pivoting axis 34b is arranged on the side of the first pivoting axis 34a which is averted from the attachment section <NUM>, and with a spacing to the latter. As a result of the annular or annular segmental configuration of the connector section <NUM>, it is further possible for the connector section <NUM> to be rotated, relative to the attachment section <NUM>, about a radial axis of rotation <NUM>, which is in particular oriented along the first direction <NUM>. It is thus possible for the connector <NUM>, in particular the at least one pin <NUM>, to be connected to the control device <NUM> in a simplified manner, and in particular to be inserted in the receptacle <NUM>, such that the manufacture and assembly of the electrical machine <NUM> is simplified. Moreover, the movement of the connector <NUM>, in particular the at least one pin <NUM>, relative to the stator <NUM> and relative to the control device <NUM> thus permitted allows the busbar device <NUM> and/or the stator <NUM> and/or the control device <NUM> to be manufactured with greater tolerances.

In the exemplary embodiment represented, the connector <NUM> of busbar device <NUM> comprises an associated pin <NUM> for the respective winding <NUM>. This means that the connector <NUM> comprises a first pin 19a for the first windings 24a, a second pin 19b for the second windings 24b, which is electrically isolated from the first pin 19a, and a third pin 19c for the third windings 24c, which is electrically isolated from the first pin 19a and from the second pin 19b. The connector <NUM> and thus the respective pin <NUM> is spaced in a first direction <NUM> vis-à-vis the attachment section <NUM>, and is in particular arranged opposite the attachment section <NUM> in said first direction <NUM>.

In the exemplary embodiment represented, the connector <NUM> is spaced from the stator. The pins <NUM> are accommodated in the connector <NUM>, and project from the connector <NUM> on the side which is averted from the stator <NUM>. The connector <NUM> comprises a jacket <NUM> which, in <FIG>, is represented as transparent. The jacket <NUM> is open on the side which is averted from the stator <NUM>, and thus comprises a jacket opening <NUM>. The pins <NUM> project from the jacket opening <NUM>, and are enclosed by a seal <NUM> which closes the jacket opening <NUM>. The connector <NUM> of the exemplary embodiment represented further comprises two ducts <NUM>, through each of which an unrepresented screw can be fed, in order to mechanically load and pressurize the connector <NUM> in the direction of the control device <NUM>, in particular in the direction of the receptacle <NUM>. The pins <NUM> are arranged between the ducts <NUM>. Two hard stops <NUM> are arranged on the side of the connector <NUM> facing the stator <NUM>. The hard stops <NUM> are two part. Each of the hard stops <NUM> can be arranged coaxial to one of the ducts <NUM> and can comprise an inner thread <NUM>. The hard stops <NUM> prevent any direct electrical connection of the respective pin <NUM> with the stator <NUM>, in particular with the windings <NUM>.

For each pin <NUM>, the busbar device <NUM> further comprises, for the electrical connection of the respective pin <NUM> to the associated windings <NUM>, an associated terminal <NUM>, which is spaced from the pin <NUM>. In the exemplary embodiment represented, the terminals <NUM> are arranged on the attachment section <NUM>, and project radially outwards from the attachment section <NUM>. This means that the busbar device <NUM> comprises an associated first terminal 43a for the first pin 19a, an associated second terminal 43b for the second pin 19b, and an associated third terminal 43c for the third pin 19c. In each case, the terminals <NUM> are electrically isolated from one another by the carrier <NUM>. The respective terminal <NUM> is electrically connected to the associated pin <NUM> by means of an associated electrical conductor <NUM>. This means that a first conductor 44a electrically connects the first pin 19a to the first terminal 43a, a second conductor 44b electrically connects the second pin 19b to the second terminal 43b, and a third conductor 44c electrically connects the third pin 19c to the third terminal 43c. In the exemplary embodiment represented, the respective conductor <NUM> is configured with a flat profile, in particular as a plate <NUM>. The conductors <NUM> are respectively arranged within the carrier <NUM>, are enclosed by said carrier <NUM> and are electrically isolated from one another. In the exemplary embodiment represented, the respective terminal <NUM> is integrally configured with the associated conductor <NUM>, in particular by the reshaping of an outwardly projecting end of the conductor <NUM>. The terminals <NUM> are arranged with a mutual spacing in the circumferential direction <NUM>.

As can in particular be seen from <FIG>, the stator <NUM>, for each terminal <NUM>, comprises an associated mating terminal <NUM>, which is electrically connected to the associated terminal <NUM>, in order to electrically connect the latter, and thus the associated pin <NUM>, to the associated windings <NUM>. The stator thus comprises an associated first mating terminal 46a for the first terminal 43a, an associated second mating terminal 46b for the second terminal 43b, and an associated third mating terminal 46c for the third terminal 43c, wherein the mating terminals <NUM>, in a corresponding manner to the terminals <NUM>, are mutually spaced in the circumferential direction <NUM>. The first mating terminal 46a is electrically connected to the first windings 24a, the second mating terminal 46b is electrically connected to the second windings 24b, and the third mating terminal 46c is electrically connected to the third windings 24c.

In the exemplary embodiment represented, the attachment of the attachment section <NUM> to the stator <NUM> is executed by means of connection means <NUM> of the attachment section <NUM>, each of which, by means of an associated mating connection means <NUM> of the stator <NUM>, constitutes a mechanical connection. In the exemplary embodiment represented, the connection means <NUM> project radially outwards from the attachment section <NUM>, and are mutually spaced in the circumferential direction <NUM>. The terminals <NUM> are thus arranged in the circumferential direction <NUM> between the connection means <NUM>. Accordingly, the mating connection means <NUM> are also arranged with a mutual spacing in the circumferential direction <NUM>, wherein the mating terminals <NUM> are arranged in the circumferential direction <NUM> between the mating connection means <NUM>. The mechanical connection between the respective connection means <NUM> and the associated mating connection means <NUM> can be executed in any manner desired. Adhesive bonding, welding, soldering, screwing or similar are in particular conceivable.

As can be seen from <FIG>, two collars <NUM> projecting into the second chamber <NUM> are provided adjacent to the passage <NUM>, wherein the respective collar <NUM> is aligned with one of the bushings <NUM>. An unrepresented screw, which is fed through the respective collar <NUM> and the associated bushing <NUM>, thus mechanically loads the connector <NUM> in the direction of the inner wall <NUM> and the control device <NUM>. This results in a simple and reliable assembly of the electrical machine <NUM>, and in particular in a stable electrical connection of the respective pins <NUM> with the control device <NUM>. In this manner, moreover, the seal <NUM> is loaded and pressurized against the inner wall <NUM> and the control device <NUM>, such that a reliable seal is achieved.

Claim 1:
Electrical machine (<NUM>), in particular an electrical compressor (<NUM>),
- having a stator (<NUM>), which comprises at least one winding (<NUM>),
- wherein the stator (<NUM>) extends in an axial direction (<NUM>) and runs in a circumferential direction (<NUM>),
- having a busbar device (<NUM>) comprising at least one electrical conductor (<NUM>) for the electrical connection of the at least one winding (<NUM>) to a control device (<NUM>),
- wherein the busbar device (<NUM>) comprises a carrier (<NUM>) encapsulating the at least one electrical conductor (<NUM>) and a connector (<NUM>) which is electrically connected to the control device (<NUM>),
- wherein the carrier (<NUM>) is arranged on an axial end face (<NUM>) of the stator (<NUM>),
- wherein the carrier (<NUM>) extends radially and in a circumferential direction (<NUM>),
- wherein the carrier (<NUM>) comprises an attachment section (<NUM>) and a connector section (<NUM>) which is joined to the attachment section (<NUM>) in a first direction (<NUM>) which runs transversely to the axial direction (<NUM>),
- wherein the attachment section (<NUM>) is attached to the stator (<NUM>),
- wherein the connector section (<NUM>) is detached from the stator (<NUM>) and the connector (<NUM>) is arranged on the connector section (<NUM>), characterized in that the connector (<NUM>) is relatively movable vis-à-vis the stator (<NUM>) by means of the connector section (<NUM>).