Abstract: A stator assembly structure has a latch and coupling design to assemble every element of the stator so that the stator structure may be disassembled and separated. The separated elements may be recycled according to their material nature to reduce waste of resources.

Abstract: Apparatus for mounting an electric motor, which is adapted to drive an endless belt at a predetermined tension, to a stationary frame, includes a housing that is adapted to receive the motor. A drive shaft extends from the front end of the housing and is adapted to drive the belt. An elongated base mount is integrally formed on the outside surface of the housing and extends from the front of the housing for pivotally coupling the housing to the stationary frame. The base mount has a first end and a second end, and a bore which extends longitudinally at least partially through the base mount from the first end and the second end of the base mount. A substantially rigid tab is fixedly attached to the cylindrical housing at a substantially opposite side from the base mount. The tension on the belt is set by applying a biasing force on the tab to pivot the motor about the axis of the base mount.

Abstract: An electric motor with integral attachment means includes two lever arms spaced equally about the circumference of the motor housing. The lever arms are hingeably connected to the motor housing and are rotatable between clamped and relaxed positions. An attachment foot located at the end of each lever releasably engages a mounting plate, thereby effecting the mounting and dismounting of the motor to the mounting plate. The lever arms are resilient and radially outwardly bowed in the relaxed state so that they can be locked in their clamped position by the snap action between the levers and radially-extending tabs on the motor housing. Feet of the lever arms engage mounting holes in a mounting plate and when in the locked position a heel element of each lever arm foot occupies a slot in the motor housing and thereby the foot of each lever arm resiliently applies a clamp force against the motor housing and the mounting plate.

Abstract: With a motor having a motor housing and a motor shaft, a sleeve of predetermined length is mounted on the motor shaft with a proximal end of the sleeve engaging against a bearing that is mounted in the motor housing and supports the shaft for rotation. The bearing and the sleeve function to simplify the construction of the motor by eliminating a retainer ring and its associated annular groove from the shaft that were previously necessary to hold the shaft and bearing in relative positions, and by eliminating an additional retainer ring and its associated annular groove from the shaft that were used as a locator to positively locate a machined surface on the motor housing relative to the shaft and to positively locate a rotating component on the end of the shaft.

Abstract: An outer rotor type brushless motor comprising an outer rotor having permanent magnets fixed onto an inner periphery of a rotor yoke, a stator including a stator core having a plural of magnetic pole portions protruded on an outer periphery thereof and coils wound on the magnetic pole portions, a cylindrical boss disposed on an inner periphery of an annular portion of the stator core, a rotational shaft extending along an axis of the boss and rotationally supported on the boss through a bearing with a leading end of the shaft having a center portion of the rotor yoke fixed thereto and a mounting plate fixed onto an outer periphery of the boss wherein the boss is formed of resin mold and extending through a hole in the mounting plate and fixed thereto and the annular portion of the stator core is mounted on and fixed to a rising portion on the inner periphery of the mounting plate.

Abstract: A motor has a stator including a coil bobbin with winding sections to be wound by windings and a terminal section. The terminal section outwardly protrudes in a radial direction of the coil bobbin and has fixed protruded terminal pins that are to be connected to winding start sections and wiring end sections of the windings. A curled case is placed over an exterior of the windings of the stator. The curled case has end sections in the peripheral direction and an opening section defined by the end sections of the curled case. The terminal section protrudes through the opening section, and an opening angle of the opening section is less than one half of the entire periphery of a circle.

Abstract: A rotary electric machine such as a fan motor or the like capable of coupling a bearing holder and an insulator to each other without deteriorating accuracy of a diameter of an inner peripheral surface of the bearing holder on which bearings are held. The bearing holder and insulator are coupled to each other by a coupling structure, which is constituted by at least one recess formed on a forward end of the bearing holder and at least one projection provided on the insulator and tightly fitted in the recess. The projection and recess thus fitted together are concurrently heated at a peripheral portion thereof for deformation, resulting in being coupled to each other.

Abstract: A rotor assembly includes at least one superconducting winding assembly positioned within a cryogenic region of the rotor assembly, and a cantilevered member, mechanically coupled between the at least one superconducting winding assembly and the shaft. The cantilevered member extends between the non-cryogenic region and cryogenic region of the rotor assembly. The at least one superconducting winding assembly, in operation, generates a magnetic flux linking the stator assembly.

Abstract: A rotor structure of a motor is provided. The rotor structure includes a magnet having a first annular wall, a magnet holder having a base and a second annular wall connected with the first annular wall of the magnet for fixing the magnet, a shaft having one end mounted through the base of the magnet holder, and a stopper mounted in the other end of the shaft.

Abstract: An electric motor is disclosed, which has a motor housing (15) and means, disposed on the motor housing (15), for retaining the motor housing (15) in the interior of a hollow-cylindrical receptacle part (13), in particular in a blower housing (10). To achieve a reliable seat of the electric motor (11) in the receptacle part (13) and to avoid damage to the receptacle part (13) as the motor housing (15) is press-fitted into it, the means for retaining the motor housing (15) in the receptacle part (13) are embodied as studs (21, 22), disposed in the motor housing (15), which as the motor housing (15) is press-fitted into the receptacle part (13) press against the inner wall (131) of the receptacle part (13) with nonpositive engagement (FIG. 1).

Abstract: A rotordynamic system includes a vertically arranged motor, rotordynamic device and controller. The rotordynamic device is a centrifugal pump or compressor operated by the motor to drive a fluid from the input to the output. A liquid cooling system operates to maintain the controller and motor at a desired operating temperature. Due to the liquid cooling system, the controller operates the motor at effectively any practical speed. The liquid cooling system is in heat exchange relationship with an oil system contained within the motor to distribute thermal energy therebetween to further increase thermal control of each.

Abstract: The invention relates to a device (10) for fixing an electromotor (18), in particular a fan motor. Said device comprises an essentially pot-shaped receiving housing (12), acting as a motor housing (32) with a receiving opening (14), into which the electromotor (18) at least partially projects and a retaining flange (34) mounted on the receiving housing (12) for fixing the motor housing (32) to a support element (36), for example a motor vehicle heating and/or air conditioning system, in addition to elements for radially and axially fixing the electromotor (18) in the motor housing (32). According to the invention, the receiving housing (12) has at least one elastic retaining element (50, 52, 90) for axial fixation. Said element is at least partially coated with an elastic material (66) on the side that faces the motor (18), is connected to the receiving housing (12) by its first axial end (54) and lies directly against the motor (18) in the vicinity of its second axial end (58).

Abstract: An interconnecting ring and wire guide for an electric machine includes an annular radial ring having a radially inner edge and a radially outer edge. An axial ring projects axially from the radially inner edge of the annular radial ring. A guide positioner positions the annular radial ring and the axial ring relative to the electric machine. Wire dividers are located on a radially outer surface of the radial ring. The wire dividers include a plurality of circumferential projections that are formed on the radially outer surface of the radial ring. A plurality of wire guides are located adjacent to a radially outer edge of the annular radial ring. Indicia on an outer surface of the annular radial ring identifies at least one of a mounting position for the interconnecting ring and wire guide and a wiring schematic for phases wiring of the electric machine.

Abstract: A stator core (20) and manufacturing frame (40) combination, a stator core plate punching member (30), and methods of rolling a core body (22) without risk of significant damage to the core body (22) are provided. The combination preferably includes a stator core (20) having a substantially cylindrical and elongate core body (22). The core body (22) preferably includes a plurality of plate punching members (30). Each of the plurality of plate punching members (30) has a substantially smooth outer surface (32). The combination also preferably includes a manufacturing frame (40) positioned to substantially underlie the core body (22). The frame (40) preferably includes a plurality of spaced-apart rollers (45) each positioned to contact the substantially smooth outer surface (32) of each of the plurality of place punching members (30).

Abstract: A spindle motor (10) including a stator component (16), a rotor component (18), including a hub (14) for supporting one or more discs, and a bearing assembly between tHe components, formed of a journal bearing (54) and a thrust bearing (52), wherein the journal bearing (54) is an aerodynamic bearing and the thrust bearing is adapted to function in a bi-directional manner and includes an annular member (30) projecting radially from one of the components into an associated recess (76) formed in the other of the components. Preferably, the annular member has two opposed bearing faces (68,70) arranged adjacent corresponding bearing surfaces of the recess, and a hydrodynamic bearing is formed between the respective bearing faces and surfaces.

Abstract: An electric motor structure includes an electric motor having a housing and an endcap coupled to an end of the housing. The endcap includes a bearing pocket constructed and arranged to cover a bearing structure. The motor structure also includes a heat shield coupled directly to the motor so as to surround and cover the bearing pocket, with a portion of the heat shield being spaced from the bearing pocket.

Abstract: A motor includes a stator and a rotor having drive permanent magnets and a rotary shaft. The stator supports a core with coils wound thereon and includes a base plate. The base plate is formed with a resin, and is composed of a core supporting section that supports the core, a shaft supporting section that rotatably supports the rotary shaft, and attachment sections for attaching the motor to an apparatus. The core supporting section, the shaft supporting section and the attachment sections of the base plate are formed in one piece.

Abstract: A stepping motor including a rotor (1) having a permanent magnet 1b and magnetized in multipoles, a plurality of coils (2) arranged at a surrounding of the rotor (1) and wound around a radius direction of the rotor (1), a supporter (3) in a cylindrical shape for supporting the coils (2), and a casing (4) for surrounding the permanent magnet (1b), the coils (2) and the supporter (3) and fixed with the supporter (3), characterized in that the supporter (3) comprises an insulating film having a flexibility.

Abstract: A motor includes a surface mountable motor base having (a) a base, (b) a bearing supporter extending from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for supporting a stator, and (d) a terminal for connection to a winding of the stator, the terminal exposed on a bottom of the motor base and extending substantially parallel to the base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements with each other, and time-consuming bonding. A method of assembling the same motor achieves high productivity.

Abstract: A rotor for a high speed permanent magnet motor comprises a central spindle (20), and a plurality of magnet discs (21) stacked on the spindle (20) and axially clamped by a clamping device (24-26, 28) on the spindle (20) to form an axially pre-tensioned disc packet core (16). Each magnet disc (21) has at least one electrically insulating layer, and a reinforcement disc (23) is provided between the magnet discs (21) and/or between at least one of the magnet discs (21) and the clamping device (24-26, 28). The reinforcement discs (23) are clamped such that a clamping force generated frictional engagement is obtained between the reinforcement discs (23) and the magnet discs (21) by which centrifugal forces are transferred from the magnet discs (21) to the reinforcement discs (23) during motor operation, thereby relieving the magnet discs (21) of tensile stress.

Abstract: A motor has plural through-holes punched in a top surface of its frame. A cap made of magnetic material is placed at a location on a stator which corresponds to the through-holes, and the cap is spaced axially from the through holes. An attracting magnet is placed outside the cap. This structure allows a bearing to hold its oil, and generates attracting force in an axial direction without adversely affecting driving-magnetic-circuits. As a result, an apparatus using this motor can be low in profile and run at a high speed.

Abstract: A brushless-type alternator has a rotor, which comprises a pair of pole cores. The pole cores include a plurality of nail parts, respectively. The nail parts are arranged alternately in a rotating direction of the rotor. The nail parts are coupled to-each other with a non-magnetic ring. A permanent magnet is interposed between adjacent two of the nail parts, and fixedly held in position with the non-magnetic ring. The permanent magnets are located radially inside or outside the non-magnetic ring.

Abstract: It is disclosed a device for axial stopping of a rotor, in particular an armature of an electric motor, for balancing machines, the device comprising a thrust unit having an abutment surface (8) adjacent to an end face (4b) of the support shaft (4) of the rotor (5) and adapted to exert on the end face (4b), a repulsive force which is able to keep an interstice (1a) between the abutment surface (8) and the end face (4b), the thrust unit comprising fluid-emitting means (9) suitable to form a layer of fluid between the abutment surface (8) and the end face (4b).

Abstract: A turbine generator with stator windings and a hydrogen pressured stator frame, comprises an annular L-shaped collar flange affixed across a circumference of the stator frame and soldered thereto by a solder bond; a terminal plate anchored to the collar across the circumference of the stator frame and marginally separated from the collar to form a first annulus that contains a first sealant composition that interfaces with the solder bond; and a hardening sealant applied to an upper portion of the solder bond. A high voltage turbine generator is sealed by filling a first annulus formed between an annular L-shaped collar flange affixed across a circumference of the stator frame and soldered thereto by a solder bond and a terminal plate anchored to the collar across the circumference of the stator frame with a first sealant composition; applying a hardening sealant onto the solder bond; and coextensively covering the first sealant composition and the applied hardening sealant with a second sealant composition.

Abstract: Reaction force transfer system includes a frame and a machine base supported by the frame through passive isolation structure. A carriage is supported for motion with respect to the machine base and a motor is provided having a stator coupled to the frame and a forcer coupled to the carriage to move the carriage with respect to the machine base.

Abstract: A method of forming a winding support structure for use with a superconducting rotor wherein the method comprises providing an inner support ring, arranging an outer support ring around the inner support ring, coupling first and second support blocks to the outer support ring and coupling a lamination to the first and second support blocks. A slot is defined between the support blocks and between the outer support ring and the lamination to receive a portion of a winding. An RTV fills any clearance space in the slot.

Abstract: A stepper motor with bearing mechanism comprised by a sole-singular bearing element is developed. The sole-singular bearing element is mounted and fixed at a hole of the motor frame-cup and/or motor-mount-plate for the fixation. The bearing element is with elongated length extended inward to the internal space within the inner part of the rotor of the stepper motor.

Abstract: A balancing plate comprises an axial hole for engagement with a stator and at least two induction edges symmetrically arranged with respect to the axial hole. Each induction edge includes an arc length that is not greater than a length of one of plural poles of an annular permanent magnet of a rotor. When the motor rests, the induction edges of the balancing plate face at least two of the poles of the annular permanent magnet having the same polarity, forming a mating therebetween to thereby allow easy restarting of the motor.

Abstract: A bearing supporter and stator supporter concentric with the bearing supporter and for being mounted with a stator assembly are provided on a motor base. Around the bearing supporter, lower faces of metal terminals are exposed from a bottom face of a base section. The stator assembly is fit on and fixed to the stator supporter. Further the motor base has a stator stopper protruded from the base section, and the stator stopper faces closely a lower end face of an outer wall of the stator assembly in axial direction. This structure allows a motor to be reflow-soldered to a board of an apparatus using this motor, and increases impact-resistance against radial load and thrust load applied to a radial and thrust bearings, a coupling section of the bearing supporter and the motor base, a coupling section of a shaft, a coupling section of the motor and the apparatus.

Abstract: A power generation system (10) including an apparatus for attaching a generator stator core (20) to a frame support (30) and associated methods are provided. The system (10) preferably includes a stator core frame support member (30) and a generator stator core (20) including a plurality of keybars (22) positioned spaced-apart and extending along outer peripheral portions of the generator stator core (20). The generator stator core (20) is positioned to overlie the stator core frame support member (30). The system (10) further includes a core supporter (40) connected to the stator core frame support member (30) and positioned to contact the generator stator core (20). The core supporter (40) includes first (43) and second (44) core connectors (42) for stabilizing the power generation system and relieving vibration and eliminating lateral movement of the generator stator core (20) during operation.

Abstract: A method and apparatus for mounting a generator to an engine to concentrically align a stator with a rotor is disclosed. The engine powered generator includes an engine and a plate or wall mounted to the engine. A generator is mounted to the plate. The stator is secured in a generator housing having a circular cross section. A plurality of pins, preferably six or more, on the plate contact a surface of the housing. The pins may be dowels and/or cylindrical, and contact an inner and/or outer housing surface, tangentially or otherwise. The wall is substantially normal to the axis about which the engine shaft rotates. The pins protrude from the wall parallel to the axis, and the stator may be permanently affixed to the housing.

Abstract: A rotor for an automotive alternator comprises a cylindrical bobbin fitted over the base portions of a pair of field cores having a cylindrical portion and a pair of first and second annular flange portions projecting perpendicularly from both ends of the cylindrical portion, and a field winding wound a predetermined number of turns into multiple layers on the cylindrical portion of the bobbin, wherein the field winding has a flat shape in which a pair of opposite flat surfaces are parallel, the field winding being wound onto the cylindrical portion of the bobbin such that the pair of opposite flat surfaces face the inner circumferential side and the outer circumferential side, respectively, relative to the radial direction.

Abstract: An axle tube structure for a motor includes a casing having an axle tube. An inner periphery of the axle tube includes plural grooves each having an open upper end. An annular groove is defined in a bottom of the inner periphery of the axle tube. An engaging member includes a ring engaged in the annular groove of the axle tube and plural legs extending from the ring. Each leg is engaged in an associated one of the grooves of the axle tube.

Abstract: A vehicle AC generator includes a rotor, a stator having a stator core and a stator winding, a pair of front and rear frames and electric components including a rectifier unit and other electrical parts disposed rear of the rear frame. The stator winding is connected to the rectifier unit by one of means of welding, soldering and clamping, and the rear frame has a stay having a fixing surface disposed rear of the electric components. Therefore, it is not necessary to provide a space for screwing a screw bolt to connect the stator winding and the rectifier unit. Because cooling air is discharged from a discharge window along the stay, heated air will not return to any of air intake window.

Abstract: An axle tube structure for a motor comprises a casing having an axle tube. An inner periphery of the axle tube includes plural grooves each having an open upper end. An annular groove is defined in a bottom of the inner periphery of the axle tube. An engaging member includes a ring engaged in the annular groove of the axle tube and plural legs extending from the ring. Each leg is engaged in an associated one of the grooves of the axle tube.

Abstract: A motor includes a cylindrical rotor having a magnet, a stator having a cylindrical inner peripheral surface opposing to an outer periphery of the rotor, an output shaft projecting from one axial end side of the stator, and a frame fixed to the one axial end side of the stator to pivotally support the output shaft at a distal end thereof. Holes having diameters identical to the inner diameter of the stator are formed in the frame for pivotally supporting the distal end of the output shaft and for fixing the stator. A positioning jig of a diameter slightly smaller than those of the holes are simultaneously inserted into a hole defining the inner peripheral surface of the stator and into the two holes in the frame, and the positioning jig are caused to abut against the inner peripheral surfaces of the holes to effect positioning.

Abstract: Disclosed is an outer rotor type induction motor. The present invention includes a driving shaft, a stator core fixed to a frame and having a plurality of stator slots so that the driving shaft penetrates a center of the stator core, a coil wound on the stator slots so as to form a rotatory magnetic field, a rotor housing installed outside the stator core so as to maintain a predetermined slit with the stator core wherein the driving shaft is coupled through a bottom center of the rotor housing, a rotor conductor coupled with an inner circumference face of the rotor housing so as to generate a torque by the rotatory magnetic field of the coil, and a plurality of upper blades installed at an upper end of the rotor housing so as to leave a predetermined interval therebetween wherein an external air is forcibly sucked in to cool the coil when the rotor housing revolves.

Abstract: A motor mounting platform for use in a small appliance such as a vacuum cleaner. The motor mounting platform includes a platform with a hole extending therethrough, at least one motor support mounted to the platform at least two pair of brush holder guides mounted directly on the platform and at least two brush holders constructed of electrically non-conductive material, removably engaged to the platform within the brush holder guides. A method for manufacturing a commutator brush assembly having a commutating brush within a commutator brush holder involving the steps of providing a commutator brush holder having an opening between a first end and a second end in which the opening receives a commutator brush and a top side having a first slot therealong in communication with the opening and positioning a lead wire for connecting to the commutator brush through the first slot is also disclosed.

Abstract: In the embodiments described in the specification, permanent magnets are retained on a permanent magnet rotor rim by inverted U-shaped retainers and in one embodiment the outer surfaces of the retainers converge inwardly in the radially outward direction and engage corresponding surfaces of adjacent pole pieces which converge inwardly in the radially outward direction. In another embodiment the U-shaped retainers are affixed to the rotor rim by screws accessible through openings in the radially outer wall of the retainers and a further embodiment each retainer has outwardly projecting flanges which are affixed to the rotor rim by screws.

Abstract: An angle measuring system that includes a stator and a rotor for measuring an angular position between a stationary first object and a second object, which is rotatable about an axis of rotation. A coupling couples the stator to the stationary first object so that the stator is fixed against relative twisting, but is also radially and/or axially resilient. A mounting element that clamps a face of the stationary first object by expanding in a radial direction with respect to the axis of rotation. An expansion element that interacts with the mounting element so as to cause the expanding in a radial direction and a screw that actuates the expansion element, wherein the screw is screwed into the stationary first object.

Abstract: A vehicle rotary electric machine to be mounted in an engine is comprised of a rotor having a shaft, a stator, a front housing, a rear housing and a pulley. The front housing has a first mounting stay disposed at a side of the front housing to be fixed to a cylinder block of an engine by a bolt and a second mounting stay disposed at the opposite side of the front housing with respect to the shaft to be fixed to a cylinder head of the engine by a bolt having the same outside diameter. The rear housing has a third mounting stay to be fixed to the cylinder head at the same side of the rear housing as the second mounting stay. The first mounting stay has an elliptical first bolt-hole extending perpendicularly to the stack direction. The a major axis of the elliptical hole extends in parallel to the stack direction.

Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor core, said coil winding having a side section adjacent a side of the rotor core; at least one tension rod extending through a conduit in said rotor core; at least one tension bolt extending between an end of the tension rod and abutting the side section of the coil winding; and a channel housing attached to the tension bolt and the coil winding.

Abstract: Disclosed is a vibration motor having a connector header coupled to an outer face of a housing via welding to maintain a securely fixed position even under external impact or dropping.

Abstract: A cooling system for a vehicle includes a shroud attachable to a fixed portion of the vehicle. A stator assembly for a brushless DC ring motor is attached to at least one mounting support of the shroud. A cooling fan is piloted on the stator assembly, and includes a ring supporting a plurality of fan blades for sweeping an area inside the shroud. A rotor assembly for the brushless DC ring motor is attached to the ring of the cooling fan. The rotor assembly confronts the stator assembly around an outer diameter of the stator assembly. The cooling system is controlled by an electronic controller to rotate the cooling fan to provide appropriate cooling for the vehicle.

Abstract: A superconducting machine of the type having a stator assembly and a rotor assembly that rotates within the stator assembly and is spaced from the stator assembly by a gap is disclosed. This arrangement can be used, for example, to produce a superconducting motor or generator. In one aspect of the invention, the superconducting rotating machine includes at least one HTS superconducting winding assembly which, in operation, generates a magnetic flux linking the stator assembly and rotor assembly, a refrigeration system for cooling the at least one superconducting winding of the rotor assembly and the superconducting rotating machine has a torque density of approximately 75 Nm/Kg or more at 500 RPM or less.

Abstract: A stator and a method of forming the stator comprises providing a stator frame having a frame plate, and connecting key bars to the frame plate at respective connection points, each of the key bars having a dovetail. The stator and method further includes providing a stator core comprising laminations each having a dovetail slot formed therein. Each dovetail is engaged into a respective dovetail slot so that at least some of the dovetails contact respective laminations at respective contact points. The locations of the contact points are controlled such that a force load transmitted by the contact points is evenly distributed among the contact points to thus minimize the maximum force transmitted. The location of the contact points is controlled such that a key bar stress at the connection points is also minimized.

Abstract: Disclosed is a vibration motor.

Abstract: An electronically commutated brushless motor including a housing for accurately angularly aligning a position sensor relative to a position of a stator. The housing includes an integrally formed bridge for precisely situating the position sensor within the bridge, and a plurality of integrally formed locating ribs formed on an internal surface of a circumferential wall portion of the housing for precisely angularly situating the stator within the housing. Since the locating ribs and the bridge are all integrally formed on the housing, this eliminates the possibility of angular misalignment of the position sensor relative the stator during assembly of the motor.

Abstract: A housing for a motor is described. The housing extends between a pair of endshields and includes an inner surface, an outer surface, and at least one raised projection extending outwardly from at least one of the housing inner and outer surfaces. The projection includes at least one opening extending therethrough and at least one fastener configured to attach to the inner surface and extend outwardly through the housing opening.

Abstract: A heat sink structure is provided for a rectifier assembly of an air-cooled generator. The heat sink structure comprises a substantially annular base having inner and outer edges. The inner and/or outer edges have (has) a cooling fin arrangement projecting out from the base. The heat sink structure is provided with diode mounts. Each diode mount is adapted to retain a respective diode in a thermally conductive (and preferably press-fit) manner. Heat from each diode is transferred to the base and cooling fin arrangement, to provide a heat sink effect. Also provided is a method of manufacturing a heat sink structure. The method comprises the steps of configuring a sheet of thermally conductive material to include a substantially annular base and radial extensions of the base, and bending the radial extensions so that the radial extensions are substantially perpendicular to the annular base. Perpendicular extensions or prongs thus are defined. A rectifier assembly is provided.