Abstract: In a spindle apparatus for a machine tool, a spindle is supported on a housing by support-purpose bearing devices, and is rotated by an electric motor, and a tool is attached to a tool attaching portion formed at a distal end of the spindle. A radial magnetic bearing for vibration suppressing purposes which includes a plurality of electromagnets is provided around the tool attaching portion of the spindle. A plurality of radial displacement sensors for detecting a displacement of the tool attaching portion in radial directions are provided around the tool attaching portion. There is provided an electromagnet control unit for controlling the electromagnets of the radial magnetic bearing on the basis of outputs of the radial displacement sensors so as to support the tool attaching portion in a predetermined position.

Abstract: Taught herein is a controller for a DC brushless motor comprising a control board (3) and a housing (4); wherein the control board (3) is disposed in the housing (4), and the housing (4) is made of metal materials with good thermal conductivity; a plurality of heat sinks (5) are disposed at the bottom of the housing (4), thereby heat generated by the control board (3) will be dissipated fast, and the operating temperature and failure rates are reduced; an integrated power module chip (7) disposed at the bottom of the control board (3) transfers heat to the housing (4) via an insulating heat sink (8), and in doing so prevents electric leakage; the purpose of a plurality of gaps (9) disposed at the top of the housing (4) is to provide ventilation, and to dissipate heat fast; all of these design characteristics make the invention simple in structure, and convenient for mass assembly.

Abstract: The invention comprises an electrical machine with a stator (10) formed of plates, said stator (10) having an outer surface (11) and a first and second end (12) in the axial direction (2) and said stator being supported on the frame (1) of the electrical machine. The stator (10) is supported by necks of material (40a-d) on the outer surface (11) at both ends of the stator. The number of necks (40a-d) at both ends of the stator is even. The stator (10) has a vertical symmetry axis (7) perpendicular to the axial direction (2) and a horizontal symmetry axis (8) perpendicular to the axial direction (2), and the necks (21a-f, 31a-d, 40a-d) are located symmetrically in relation to at least one of the symmetry axes (7, 8).

Abstract: A housing 25 of a stepping motor 1 consists of a pair of case sections 27 arranged in front and rear in the direction of an axial line L of a rotating shaft 3. The case sections 27 are formed of: an end plate 27a to which a bearing 31 for supporting the rotating shaft 3 is fixed, and a base plate 27b and a top plate 27c extending from the end plate 27a in the direction of axial line L of the rotating shaft 3. The case sections 27 are formed by bending a single plate material.

Abstract: An electronic control unit (ECU) for a motor is mounted to a drum housing or the like in a plane parallel to the plane defined by the surface of the drum housing on which the motor is mounted. The housing for the motor includes an aperture window. Power contacts from the ECU mate with contacts from the motor through the window. Hall-effect sensors attached to the ECU can extend through the aperture to be proximate a ring magnet attached to the armature shaft of the motor. Alternatively, flux guides attached to the drum housing to transmit magnetic flux information from the motor to the Hall-effect sensors. Alternatively, optical sensors attached to the ECU can detect rotations of a reflector ring attached to the armature shaft through the window.

Abstract: The production costs of electrical machines are to be reduced. To this end, it should be possible to use standard transmitters for different axis heights of the electrical machine. The invention therefore provides a transmitter cover for an electrical machine, having a pot-like hood (11) for mounting on the electrical machine and for covering a transmitter, wherein the hood (11) has a central axis. The transmitter cover also has a mounting ring (10) which engages on the hood (11) in an interlocking manner. As a result, the hood (11) is pressed against the electrical machine in the axial direction when the mounting ring (10) is fixed to the electrical machine. This can prevent fastening screws (13) colliding with other fastening screws on the motor, this possibly being the case when only the hood (11) is used to cover the transmitter.

Abstract: A sealant containment gasket is provided for use on an electric motor to be used in a moist environment. The inventive gasket includes a first upright wall that covers a power-supply opening in the motor with a wiring passageway and further includes a second upright wall, at least a portion of which is spaced away from the first upright wall. The walls of the gasket cooperate to form a pocket to receive wiring extending through the opening in the motor. The pocket also defines a cavity between the walls with a filling hole disposed along a top margin thereof. Liquid sealant is inserted into the cavity through the filling hole when the motor is disposed right-side-up and on its feet in the assembly position. The liquid sealant is contained within the pocket and forms a barrier around the wiring passageway to prevent moisture from entering the motor.

Abstract: A heat dissipating fan includes a fan housing having an outer frame portion. An air inlet and an air outlet are respectively defined in two ends of the outer frame portion. A hollow motor casing is formed in and integral with the outer frame portion. An inner-rotor-type motor is mounted in the motor casing and includes a rotor and a stator. The rotor is rotatably received in the stator and includes a shaft and a magnetic element. The shaft extends beyond the motor casing. The magnetic element is coupled with the shaft and faces the stator. At least one impeller is coupled to the shaft and located outside the motor casing. A circuit board is electrically connected to the stator.

Abstract: A cover for the motor housing of a ceiling fan includes a flexible wrap for covering the motor housing and a magnetic assemblage for attaching the wrap to the motor housing. The cover can be insulating, have an outer decorative surface for aesthetic effects, or both. A ship lap joint may be included to secure the ends of the cover together.

Abstract: A fan casing, webs, and a motor casing are integrally formed of a resin material by injection molding to configure a fan housing. An electrically grounded electromagnetic noise guard and a bearing holder to which an outer race of a ball bearing are electrically connected by an electrically-conducting path member provided in the fan casing by means of insert molding. Thus, the ball bearing may sufficiently be prevented from suffering electric corrosion in an electric fan of which a fan housing is made of an insulating resin.

Abstract: An electric motor includes a stator, a rotor positioned adjacent the stator and cooperating with the stator to generate a torque, and a bearing support assembly coupled to the rotor to at least partially support the rotor for rotation. An end frame includes a post positioned to engage and support the bearing support assembly. The end frame and the bearing support assembly cooperate to define a space therebetween. A mainframe is coupled to and cooperates with the end frame to substantially enclose the stator, and a set of electronics for controlling the motor is mounted in the space.

Abstract: A motor that includes a motor frame, an end-bell assembly, a stator assembly, and filling material is described. The stator assembly is placed within the frame such that at least one open area is defined between an inner diameter of the stator assembly and an inner diameter of the motor frame. The at least one end-bell assembly is attached to the motor frame, forming an inside area adjacent the motor frame and the stator assembly. The motor also includes a material configured to fill the at least one open area and the inside area of the at least one end-bell assembly for the purpose of sealing the stator assembly and the inside area associated with the at least one end-bell assembly. The material assists in a bonding and attachment between any two or more of the stator assembly, the motor frame, and the at least one end-bell assembly.

Abstract: An encoder assembly includes an encoder, a fixing cover for receiving the encoder, and a protecting cover for receiving the fixing cover. The encoder includes a main body, and a trumpet-shaped rubber collar extending from a first end of the main body. The fixing cover includes a first open end and a second open end opposite to the first open end. The second open end engages with an outer side of the rubber collar. The protecting cover includes an open end and a closed end opposite to the open end. A circular protrusion extends from an inner wall of the closed end to engage with an inner side of the rubber collar.

Abstract: A vibration motor is provided, comprising a case having an upper case and a lower case which are coupled to each other; a shaft installed in the case while being supported by the case; a rotor rotatably coupled with the shaft; a stator arranged around the shaft; a first substrate installed on an upper surface of the lower case; and a second substrate coupled to a lower surface of the lower case and electrically connected to the first substrate. The lower case has a first opening and the first substrate is electrically connected to the second substrate through the first opening.

Abstract: A brushless motor according to the present invention is provided with: a tubular stator case; a stator core fitted into the stator case; and a rotor rotatably supported via a bearing inside the stator core, wherein: an inner flange portion which extends radially inward is formed at a peripheral edge of an opening of one end of the stator case; and a bracket is fixed to the inner flange portion while contacting therewith so as to close the opening.

Abstract: An electric motor and modular system of electric motors includes at least a stator, rotor, and a housing, the modular system including several variants of electric motors, e.g., within one size, the housing having a mechanical interface that is arranged for connection to a bearing support, the bearing support including at least a bearing seat for the B-side bearing of the rotor shaft, at least two different bearing supports being alternatively connectable to the housing, a first bearing support including an additional interface for connection to a bottom part of a terminal box, or alternatively to a bottom part for power electronics, and the first bearing support forming a housing for a brake and/or a fan, a second bearing support being constructed in one piece with a bottom part of a terminal box.

Abstract: A matrix converter for the conversion of a polyphase alternating current into a desired alternating output current in which m phases of the polyphase alternating current are converted into alternating output current with n (n<m) phases of a load by a multiple number of controllable bidirectional switches. The converter includes at least one stage, and in that at least one stage of the converter each phase of the polyphase alternating current is controlled by a controllable bidirectional switch. The at least one stage of the converter is formed by a two-dimensional array of stage stacks of switching elements which stage stacks are arranged substantially parallel to each other along a stack direction perpendicular to the plane of the matrix converter, and wherein the input of the stage stacks is provided by bus bars located on one side of the stage stacks.

Abstract: An electric machine which has an arched stator and a cylindrical rotor fitted inside it and in which the flux flows in the radial direction between the stator and the rotor as in a permanent-magnet radial-flux synchronous electric machine, and in which the stator of the machine consists of stator segments (2), each of which has an independent stator core and winding, and the stator segments are arranged to be physically separate from each other so that the stator consists of stator segments arched according to the radius of the rotor and working electromagnetically independently like a linear machine, each stator segment having a stator core and a winding separate from the other stator segments, and that it comprises an overhead supporting frame structure separate from the stator cores and consisting of several longitudinal ribs (41) and parts (42) between them.

Abstract: An electric motor includes a stator and a rotor having a rotor shaft with a longitudinal axis. The rotor shaft has a locating groove formed substantially continuously around the rotor shaft. The locating groove has a base and a pair of opposing sidewalls. The base is arranged substantially parallel to the axis of rotation. The pair of opposing sidewalls extends from the base wall substantially perpendicular to the axis of rotation. The motor includes a thrust system mounted on the rotor shaft, and a locator disposed in the groove for locating the thrust system in a predetermined position along the rotor shaft.

Abstract: A method for assembling an electric motor of the type comprising a stator unit (5) and a rotary unit (6) housed in a containment compartment (2a) delimited by a casing (2), comprises the step of exposing the compartment (2a) to a different pressure relative to the outside environment and the step of checking for the passage of fluid between the outside environment and the compartment (2a) in order to test the motor (1) hermetic seal.

Abstract: The present invention provides a linear motor 1 that can prevent a magnet member 2 from falling down when a power supply is turned off. A linear motor 1 includes a magnet member 2 composed of permanent magnets having alternately arranged respective N poles and S poles and a coil member 3 which surrounds a periphery of the magnet member 2 and trough which the magnet member 2 is movable in an axial direction relative to the coil member 3. A magnetic substance 3 is provided in the vicinity of one end of the coil member 3 to allow the magnet member 2 to exert a magnetic attractive force.

Abstract: A shaft, a circular plate portion and a cylindrical portion are integrally formed with one another through cutting operations to provide a rotor hub of a motor. An inner region on the lower surface of the circular plate portion is formed continuously with the outer peripheral surface of the shaft, and a hub thrust portion is provided in the inner portion so as to axially face a sleeve thrust portion on a sleeve main body. A stepped portion on the lower surface of the circular plate portion is disposed on the outer side of thrust dynamic pressure grooves on the sleeve thrust portion. In this manner, the stepped portion is disposed in a region where a thrust bearing portion is not provided, so that the hub thrust portion can be formed at a low cost in manufacturing the rotor hub by cutting.

Abstract: A motor module is configured for attachment to a transmission housing of a modular transmission assembly. The motor module includes a motor and a support structure. The motor is configured for rotation about a central axis and extends between a first end and a second end. The support structure is operatively connected to the motor such that the support structure at least partially supports the motor. The support structure at least partially extends across the second end of the motor. The support structure is configured for internal attachment to the housing.

Abstract: In an alternating-current generator, an end wall of a frame is provided with a plurality of fin supports separately arranged on the outer surface of the end wall. The cooling fin is mounted on the plurality of fin supports. The end wall is provided with a plurality of reinforcements each arranged between a corresponding one of the plurality of fin supports and another one thereof and each configured to reinforce a rigidity of a portion of the end wall. The corresponding one of the plurality of fin supports and another one thereof are adjacent to each other in a circumferential direction of the axis of the rotor. The rigidity-reinforced portion of the end wall is located between the corresponding one of the plurality of fin supports and another one thereof.

Abstract: An assembly mechanism is provided to press an inner stator into a receiving space of an outer stator. The assembly mechanism includes a pressing unit and a first positioning plate. The pressing unit includes a supporting device to support the outer stator, and a pressing device movable relatively to the supporting device. The first positioning plate is attached to a top of the outer stator. The first positioning plate defines an opening forming a clearance fit with the inner stator. The opening receives the inner stator and guides the inner stator to move into the receiving space of the outer stator under a pressing action of the pressing device. An assembly method is also provided.

Abstract: The invention teaches a ceiling fan motor, and specifically, a brushless DC external rotor motor, comprising an electrical control member and a motor structural member, wherein the motor structural member comprises a shaft 1, a stator 2, and a rotator 3, the stator is fit over the shaft 1, the rotator is fit over the stator 2, and the stator 3 is engaged with the shaft 1 via a pair of bearings 4. The rotator 3 comprises a top end cover 5, a bottom end cover 6, an outer shell cover ring 7, and a plurality of magnets 8, wherein the magnets 8 are positioned along the circumferential direction of the inner wall of the outer shell cover ring 7. The top end cover 5 and the bottom end cover 6 are installed on the top and bottom of the cover ring 7, respectively, and are connected to each other by means of a plurality of bolts and nuts. The ceiling fan motor of the invention provides the advantages of efficient energy consumption, low noise, and high operational stability at low speeds.

Abstract: A motor for a plate of a labelling machine comprises a housing with a connecting portion for connecting the motor to a carousel of the labelling machine, a motor shaft pivotally supported within the housing, a coupling flange having a first end connected to the motor shaft and a second end that can be connected to the plate. The motor defines a through opening, which is substantially parallel to the motor shaft that allow alignment means to have access to the plate through the motor.

Abstract: According to one or more aspects of the present disclosure, a motor protector comprises a housing defining a compensator chamber; a compensator disposed in the housing having a motor fluid end in fluid communication with a motor fluid and a well fluid end, the compensator axially moveable relative to the housing in response to the expansion and contraction of the motor fluid; and a port formed through the housing to provide fluid communication from exterior of the housing to the well fluid end of the compensator. The compensator may be one selected from the group of a bellows and a plunger.

Abstract: This disclosure relates to transient energy systems for supplying power to a load substantially instantaneously on demand. Transient energy systems may include a flywheel coupled the rotor of an induction motor generator. One embodiment of the disclosure refers to systems and methods for reducing loads on a bearing in a transient energy system. In another embodiment, the disclosure refers to an induction motor generator that is optimized for high power transient power generation, yet low power motor operation. Yet another embodiment of the disclosure refers to using a flywheel as a drag pump to cool components of a transient energy system. In yet another embodiment, a slip control scheme is discussed for regulating a DC bus. In yet a further embodiment of the disclosure a method is provided for reducing unnecessary turbine starts by making turbine start a function of the rotational velocity of a flywheel.

Abstract: A motor includes a stator core that forms a magnetic path and has a plurality of tooth parts along a circumferential direction; a tooth provided in each tooth part to wind a coil there around; and an extension part alternated with the tooth part along a circumferential direction of the stator core, convexly extending to an inner radial direction.

Abstract: Provided is a cover-integrated stator that is used to make a BLDC Brushless Direct-Current motor having a stator of a division core structure and a double rotor for use in a drum-washing machine, a slim type motor, and a direct drive apparatus for use in the drum-washing machine.

Abstract: A technique is provided to facilitate pumping of fluids in a well. A submersible pumping system utilizes a submersible motor to power a submersible pump. A motor protector works in cooperation with the submersible motor to protect motor fluid within the submersible motor and to reduce differential pressures between the internal motor fluid and the external well fluid. The motor protector incorporates a piston slidably sealed within an interior cavity of the motor protector for movement to reduce undue differential pressures.

Abstract: A securing structure for a stator includes the stator having a stator core, and a housing having an opening portion containing the stator core, and the housing includes a portion A where the clearance between the inner circumferential surface of the opening portion and the stator core is relatively smaller and the inner diameter of the opening portion is constant, and a portion B located adjacent to the portion A in the axial direction of the stator core where the clearance between the inner circumferential surface of the opening portion and the stator core is relatively larger.

Abstract: A motor includes a rotor portion including a shaft and a rotor magnet rotatable about a center axis, an armature arranged opposite to the rotor magnet to generate a torque therebetween, a circuit board arranged below the armature in an axial direction substantially parallel to the center axis and including a control circuit controlling rotation of the rotor portion, and a base portion including a bearing holder which supports the armature on its outer side surface and the shaft on its inner side surface via a bearing member. The armature is pressed against the bearing holder in the axial direction with an elastic member.

Abstract: A motor case, including at least a body forming a housing cavity; a pair of end shields, having a uniform thickness, directly attached one to each end of the body; a pair of stopping plates directly attached one to each the end shield, the stopping plates being coplanar with the end shields; and a pair of flanges directly attached one to each the end shield and together with the stopping plates forming a hollow sleeve-shaped bearing housing, the flanges extending from the end shields fully into the housing cavity, and the flanges being profiled in part at an acute angle with respect to the stopping plates, in part in parallel to the stopping plates, and in part in perpendicular to the stopping plates.

Abstract: A housing for an external rotor with a side wall; an end cover directly connected to the side wall; a cavity formed between the side wall and the end cover; a plurality of openings formed in the side wall; a plurality of wind wheels; a plurality of air inlets, each of the air inlets disposed one between adjacent wind wheels; a base disposed at the center of the end cover and connected to the side wall via the wind wheels; and a center hole disposed at the center of the base, the center hole for forming connection to a drive shaft of the external rotor. An external rotor with the housing, a magnetic conductive housing; and a plurality of magnetic tiles.

Abstract: A brushless motor includes an external stator where a magnetic circuit is electrically formed by winding electric wires around an iron core; a bus bar bundling the electric wires and forming an external input terminal; and an internal rotor formed by integrating a permanent magnet and rotatably supported through a bearing with respect to the external stator, wherein an insulation plate is held on one end of the external stator and attached thereto a magnetic pole sensor detecting a magnetic pole of the permanent magnet.

Abstract: An electric motor, e.g., a fan motor for an air conditioning fan of a motor vehicle, includes a receiving housing serving as a motor housing, which has a receiving opening into which the electric motor at least partially extends, as well as including connection elements for supplying power to the electric motor, and attachment means for the electrical connection elements. The attachment for the electrical connection elements is provided on the electric motor.

Abstract: In manufacturing of the stator unit 2 according to one preferred embodiment of the present invention, a plurality of terminal pins are arranged in an axially spaced manner from a plurality of the coils during a twining process of the wires from the coils 232 to the terminal pins 241. Then, after the wire is twined to the terminal pins, the terminal pins connected to the coils are moved along the outer side face of the sleeve housing, functioning to as a guide portion 2201 for the terminal pins. By virtue of the configuration, the terminal pins 241 may be approximated to the coils without applying the tension on wire, and the stator unit may be made thin with preventing the open circuit of the wires.

Abstract: A driving device (100) is provided with first and second rotating electrical machines (MG1, MG2); an inverter (30); a first storing case (23) having a first rotating electrical machine storing section (21) for storing the first rotating electrical machine (MG2), and an inverter storing section (300) for storing the inverter (30); and a second storing case (13) which can store the second rotating electrical machine (MG1) and can be attached to the first storing case (23); a first terminal section (121) connected to the inverter; and a second terminal section (15) which is arranged on the second storing case (13) and is connected to the second rotating electrical machine (MG1). The first terminal section (121) and the second terminal section (15) are arranged so that one protrudes toward the other.

Abstract: A motor for HVAC applications, has a stator; a motor housing forming a part of the stator; an end cap fixed to the motor housing, and a rotor rotatably mounted confronting the stator. The end cap has an opening formed by a ring-shaped collar, the collar being at least partly disposed inside the motor housing. A plurality of projections on an outer circumferential surface of the collar are received in a plurality of receiving cutouts in the motor housing. Two fingers formed at the opening of each receiving cutout are deformed to lock the received projection inside the respective receiving cutout. At least three of the projections being pressed against the axially inner end of the respective receiving cutout.

Abstract: A motor includes a rotor having a permanent magnet fitted thereon, and a stator having an inner peripheral surface spaced a predetermined distance from an outer peripheral surface of the rotor in opposed relation thereto, and the stator is press-fitted in a motor case to be fixed thereto with its outer peripheral surface. A plurality of projecting portions are formed on an inner peripheral surface of the motor case. Recess portions for engagement with the respective projecting portions are formed in the outer peripheral surface of the stator. When the stator is press-fitted into the motor case, the stator is fixed to the motor case with inner bottom surfaces of the recess portions serving as press-fitting surfaces. The projecting portions of the motor case are engaged respectively in the recess portions of the stator, thereby preventing the rotation of the stator relative to the motor case.

Abstract: A vertical actuator has a stationary part that includes an upper part made of magnetic material which is magnetically separated from a yoke which bears a coil. The upper magnetic part generates an overall reluctance force on the movable part of the actuator which, over the entire functional range of the actuator, is slightly greater than the gravitational force. When the coil is not energized, the movable part has a position of stable equilibrium which is in the upper section of this functional range.

Abstract: The energy storage device has an electrical machine (12) comprising a rotor (14) and a stator (16), the stator (16) being separated from the rotor (14) by an air gap (18) and having at least one stator coil (20). The rotor (14), moreover, has a fly-mass (22) and, together with the latter, constitutes a rotating body. The rotor (14) or the rotating body consists of a multiplicity of thin sheet-metallic discs (30), which have the form, substantially, of an annular disc having an outer edge and an inner edge. There has been applied to these sheet-metal discs (30), at their outer edge, a first tensile stress and, at their inner edge, a first shear stress.

Abstract: A terminal box for a use with a generator set is provided. The terminal box may have a customer connection, a first housing piece configured to be mounted proximate a generator of the generator set, and at least one cable housed within the first housing piece to electrically connect the generator with the customer connection. The terminal box may also have a second housing piece mounted to the first housing piece distal the generator, and at least one control component housed within the second housing piece to regulate a characteristic of electrical power produced by the generator.

Abstract: A motor module includes a bearing housing having a loading base, an electric unit, a bearing, and a magnetic rotor unit disposed on the bearing. In addition, a protruding portion is extending from the loading base, and the electric unit includes a printed circuit board (PCB) and sensing elements, wherein the PCB is utilized for disposing the loading base thereon. Moreover, signal circuits and motor windings are formed on the PCB around the loading base, the sensing elements are disposed around the motor windings, and the bearing is disposed at the protruding portion. Besides, the magnetic rotor unit is disposed on the motor windings, keeping a gap with the PCB; therefore, when electric current passes the motor windings, the magnetic rotor unit and the motor windings generate a flux linkage induction, so as to drive the magnetic rotor unit to rotate relative to the PCB.

Abstract: An end cover for an external rotor motor. The external rotor motor has a stator core having a center hole, and the end cover including a body, a cylindrical connecting portion, and multiple protruding bars each having an arc-shaped top surface. The cylindrical connecting portion is extended from the center of the body and received in the center hole of the stator core, the protruding bars are disposed on outer surface of the cylindrical connecting portion and extended in an axial direction, and the arc-shaped top surface of the protruding bar is fit with inner wall of the center hole of the stator core. The end cover is accurately fit with a stator core, requires no further processing after die-casting and thus reducing production cost, and is capable of preventing aluminum scraps from entering a stator.

Abstract: The housing of an electrical machine should, despite efficient cooling, be provided with a more compact design. To this end, the invention provides that the cooling ducts (2) of a housing (1), which is preferably provided in the form of an aluminum extruded profile, are left open toward the inside. The inner walls of the cooling ducts (2) are then formed by an inserted stator pack (4). This enables the corner areas of the housing to be kept free for assembly and the reduction of material for manufacturing the housing (1). In addition, due to the open cooling air ducts (2), thin wall thicknesses in the profile and thus small motor dimensions while simultaneously having a large cooling duct cross-section can be realized.

Abstract: A centrifugal blower comprising a cooling air path having an inlet communicating with a blower space and an outlet communicating with the inlet of the motor airflow path, the cooling air path having an upstream portion that extends axially in the direction from the opposite end of the motor toward the drive end of the motor, and the cooling air path having a downstream portion that extends axially in the direction from the drive end of the motor toward the opposite end of the motor.

Abstract: A pump unit includes an electric motor, located in a stator housing (6), a terminal box being arranged on an axial face of the stator housing (6). The terminal box (12) includes a tubular housing element (44) having a first axial face to which the axial face of the stator housing (6) is connected. An opposite second axial face (46) of the tubular housing element (44) is closed by at least one cover element (40) into which operating and/or display elements (38) are integrated. An electrical connecting element (42) is arranged on the outer periphery of the tubular housing element (44).