Abstract: In a blower in which an impeller (8), a motor yoke (11) and the like are attached to a shaft which is supported by bearings (4), (5), and a stator core (16) is arranged inside of the motor yoke (11), an annular groove (19) is provided at one end portion of the shaft (6) around its periphery and a central portion of the motor yoke (11) that is formed in a cup-shape is press-fitted and fixed to the annular groove (19). Since a zinc die-cast-made boss that has been conventionally needed may be dispensed with, the structure may be simplified and the assembling work may be performed without fail.

Abstract: A plural motor assembly includes a first motor generating a parameter, a control circuit electrically connected to the first motor for detecting the parameter and outputting a switch signal while the parameter is abnormal, and a second motor electrically connected to the control circuit and operating in response to the switch signal. Thus, when one motor is damaged, the speed of rotation of the other motor is increased to maintain normal operation.

Abstract: A household fan with motor and motor housing for shielding the motor. The electric motor is preferably a four-pole permanent-split capacitor motor with a narrow profile enabling it to fit within a narrow box fan, the motor having a stator including a core of stacked laminations. A first outermost lamination defines a first supporting surface, and a second outermost lamination defines a second supporting surface on which the front and rear casings are supported. Copper windings are wound about the core. A rotor has an output shaft which passes through a central region of the core. The front and rear casings are generally dome-shaped. Each casing has a circumferential side wall and a vented end wall. The front casing has a recessed area around the opening for the output shaft such that a portion of the bladed propeller assembly protrudes within the recessed area, allowing for a narrow profile design. Radially extending legs allow for mounting on parallel brackets along a rear grill of the fan.

Abstract: Coil ends (19) of a stator coil (18) having a cross sectional shape like a flat rectangular are constructed by first portions extending from an outer layer of a pair of slots apart from predetermined pitches in an axial direction and slanting in a circumferential direction, second portions extending from an inner layer of the other of the pair of the slots in the axial direction and slanting in the circumferential direction, and third portions positioned at ends of the coil ends (19) in the axial directions, elongated in the radial direction and connected to ends of the first and second portions in the axial direction, and in all of the first, second and third portions, long sides (300) of the cross sectional flat rectangular view of the stator coil (18) are arranged to be substantially in parallel with an end surface of the stator whereby the coil ends are lowered; and the coils are arranged without a gap.

Abstract: In an air-cooled electrical machine having reverse cooling in a closed cooling circuit, a two-stage blade cascade for the optimum incident flow of cooling air to the rotor (4) and the rotor winding (29) is provided between a rotor cap plate (22) and a rotor shaft (28). The first blade cascade stage (30b) in the direction of flow is a deceleration cascade having pressure-generating properties, and the following blade cascade stage (30a) in the direction of flow is a deceleration cascade having deflecting properties.

Abstract: Front-end and rear-end coil ends constituting front-end and rear-end coil end groups are formed into a connection pattern composed of pairs of root portions extending outwards from pairs of slots 15a three slots apart, pairs of inclined portions bent from each of the pairs of root portions and extending in a circumferential direction, and pairs of joining portions connecting together end portions of the pairs of inclined portions. Inclined portions positioned on an inner circumferential side of the coil ends are inclined forwards relative to a rotational direction of fans.

Abstract: Disclosed is an axial fan motor for air-cooling a heat sink of a heating element and thermally connected to the heat sink. The casing of the axial fan motor is formed of a plurality of laminated metal plates. The plurality of metal plates include a single first metal plate and a plurality of second metal plates. The single first metal plate, which is an outermost layer located at the air exhaust side of the fan, has a peripheral portion, a central portion, and a plurality of arm portions for connecting the peripheral portion and the central portion. A bearing holder for supporting a rotary shaft of the fan is attached to the central portion.

Abstract: A bus cooling fan that operates without an external electrical power supply. The fan is positioned between a pair of bus bars. The fan includes a rotor having fan blades and is mounted on an axle, which is supported by cross-braces in a shroud surrounding the rotor and open at the ends. The fan is fabricated of non-ferrous, non-conducting material with the exception of bent rods that support the fan blades and are mounted on an axle. The bent rods interact with the electromagnetic field created by the current-carrying bus bars and act as a rotor for an induction motor when the fan is placed between bus bars.

Abstract: A motor with a cooling mean is provided which includes a rotation axis, a rotator assembly fixed to the rotation axis, a stator assembly that surrounds the rotator assembly, a bearing attached to both ends of the rotation axis to support the rotation axis, an axial-flow fan or a hybrid fan used as a cooling means places between each bearing and the rotator assembly to cool the stator assembly and the rotator assembly, and an endshield attached to both ends of a housing to protect the structure. The motor with a cooling means further includes a plurality of air intakes; a plurality of through holes attached to the rotator assembly to circulate the air, and a plurality of concave grooves or cooling pins formed in a surface of the endshield to enlarge the cooling area to discharge the heat in the inside of the motor. Thereby, the cooling efficiency is substantially improved, the operation of the motor becomes more stable, and the life span of the motor is increased.

Abstract: The present invention relates to a structure of a rotor for a brushless motor which can improve structural stiffness, restrict noise generation by reducing vibration during the rotation, use cheap materials, reduce a fabrication cost by fabricating a back yoke and a base plate unit in a single body. improve durability, and efficiently cool a heat generated in the motor during the operation by facilitating an external air inflow.

Abstract: A fan motor with an improved inhaling structure so as to enhance ventilation efficiency and performance, as well as cooling performance. An outer housing member 7 has a respective face opposite to a drive unit 11. An intake hole 13 of an arbitrary diameter is provided in a first face of the outer housing member 7, while another intake hole 15 of an arbitrary diameter is provided in a second face thereof. Both intake holes 13 and 15, however, are formed to have a larger diameter than the diameter of a rotor 4 defined by the peripheral side face thereof, thus enabling air to be drawn in directly to the respective faces of the fan blades 3, without being hindered by the rotor 4. Moreover, the intake holes 13 and 15 are formed to define a certain portion in which the air is drawn in from one side of a fan 5 only.

Abstract: A multiple impeller flow inducing device in which driver coils are intermittently energized in timed relation to rotation of the impellers to interact with permanently magnetized portions of the impeller to rotate the same. The impellers can be rotated in opposite directions or in the same direction. A two section impeller construction allows each section to be magnetized in opposite pole orientation and when assembled creating alternate pole orientations of successive portions, arcuate segments forming a shroud or the type of blades can be magnetized to provide the impeller magnetized portions. Stator guide vanes can be interposed between successive impellers.

Abstract: A fuel-fired, forced draft air heating furnace is provided with a draft inducer fan structure which substantially reduces the operational noise of the furnace. The draft inducer fan is disposed within a sealed burner vestibule area of the furnace and is provided with an auxiliary fan blade structure mounted on its drive shaft in a spaced relationship with its main fan impeller. The auxiliary fan blade structure and the fan motor are disposed within an open-ended air transfer duct structure coupled to an air inlet opening in an exterior wall portion of the vestibule. During operation of the draft inducer fan, combustion air is drawn inwardly through the transfer duct structure, across the inducer fan motor, and into the vestibule for supply to the furnace burner section. The use of the transfer duct structure and auxiliary fan blade structure serves to cool the fan motor, preheat the combustion air, and reduce the overall operational noise of the furnace.

Abstract: A rotor for a vehicular a.c. generator comprises a bobbin having a rotor coil for generating a magnetic field wound thereon and including fixing portions for supporting lead wires of the rotor coil; a pair of rotor cores for sandwiching the rotor coil and the bobbin therebetween; slip rings having terminals to be connected to the lead wires; grooves formed in the rotor core for housing the lead wires, the lead wires extending between the fixing portions and the terminals; and a rear fan provided so as to cover the grooves. The fixing portion, the terminal and the groove for each of the lead wires are provided so as to be substantially aligned, and the groove has an inward portion near an inner periphery of the rotor formed in a greater width than an outward portion near an outer periphery of the rotor.

Abstract: An SRE fan has a hub, a carrier extending outwardly of the hub and a plurality of vanes on a first side of the carrier. The carrier has a second side opposite the first side that is configured to contact an engagement surface of a rotor segment. Channels are provided on the second side of the carrier. Rotor coil leads are surrounded by respective compressible insulated sleeves and are each routed through respective channels. The geometry of the channels is adapted to cooperate with the engagement surface of the rotor to enclose the channels and establish a uniform channel depth. The depth is selected to be less than an uncompressed diameter of the sleeves so as to provide a measure of compression when the fan contacts the rotor, holding the leads in place.

Abstract: A dynamoelectric machine having a single internal centrifugal fan and a bearing design that places a bearing outboard of the pulley to produce a more compact and less expensive device. One bearing is mounted outboard of the pulley, substantially reducing or eliminating cantilever forces on the pulley. The pulley and fan are designed with an inner diameter in a shape to fit splines which are part of the rotor shaft, eliminating the need for any type of axial clamping nut.

Abstract: An electric motor with a permanent-magnet rotor having a viscous coupling to the shaft. In its electric part, the motor can be likened to a permanent-magnet synchronous motor, in which the rotor is mounted freely on the shaft and is contained in a hermetic casing which is rigidly coupled to the shaft and contains a liquid which fills the gap between the rotor and the container. The rotor therefore drives the casing only by virtue of the presence of the interposed liquid, so that the load is not rigidly connected to the shaft and the resulting operation of the motor can be likened to that of an asynchronous motor allowing mutually different rotation rates of the shaft and of the rotating field.

Abstract: A cooling fan for an electric treadmill motor comprising an induced-draft fan of an independently running motor disposed at one side of said treadmill motor and covered with a protection hood and a support, wherein said induced-draft fan keeps at a constant air draft power no matter how fast said treadmill motor runs in order to compulsorily perform a strong cooling operation so that the air rapidly passes from a cooling air inlet at the other side of said treadmill motor through an armature inside of said treadmill motor and completely exhausted from an air outlet of said treadmill motor adjacent to said induced-draft fan in order to achieve a cooling effect and to prevent said armature of said treadmill motor from being burnt down due to being overheated.

Abstract: An electrical machine formed as a fluid-cooled three-phase alternating current generator has a cup-shaped housing, a stator arranged in the housing, a drive system, a shaft driven by the drive system, a claw pole rotor system mounted on the shaft, the claw pole rotor system including a first pole ring which is mounted on the shaft, formed as a pole wheel half and runs in claws, and a second pole ring which is formed as a pole wheel half and runs also in claws, so that tips of the claws of one of the pole rings extend in gaps between the claws of the other pole ring, pole rings producing a cooling air stream in the housing for withdrawing heat which is generated in the machine by convection through an outer casing of the housing to fluid medium which surrounds the housing, a plurality of substantially radially extending blower vanes formed on substantially flat end side of a respective one of the pole rings which is located at a side opposite to the drive system, and a ring chamber closing the blower vanes in

Abstract: A household fan with motor and motor housing for shielding the motor. The electric motor is preferably a four-pole permanent-split capacitor motor with a narrow profile enabling it to fit within a narrow box fan, the motor having a stator including a core of stacked laminations. A first outermost lamination defines a first supporting surface, and a second outermost lamination defines a second supporting surface on which the front and rear casings are supported. Copper windings are wound about the core. A rotor has an output shaft which passes through a central region of the core. The front and rear casings are generally dome-shaped. Each casing has a circumferential side wall and a vented end wall. The front casing has a recessed area around the opening for the output shaft such that a portion of the bladed propeller assembly protrudes within the recessed area, allowing for a narrow profile design. Radially extending legs allow for mounting on parallel brackets along a rear grill of the fan.

Abstract: A brushless DC motor fan includes a rotor, a stator, a drive circuit, and a conversion circuit. An input of the conversion circuit is connected to an AC power source. The conversion circuit drops the voltage of the AC power source before connecting to a sensor element and a drive circuit. The drive circuit outputs alternately conducted current with positive/negative polarity to make the coil of the stator be alternately conducted, thereby generating an alternating magnetic field for driving the rotor.

Abstract: An AC generator comprises a rotor 25 within a stator 24. The rotor carries a fan 27 at one end of the stator. The fan 27 is within a casing 30 which forms volume discharge passages 32. The fan 27 has blades 31 which project from the hub 28 at an angle which is oblique to the radial whereby those blades 31 trail the radial. The stator windings 23 form terminal leads 34 which are led from the end of the stator 24 remote from the fan 27. A circumferential array of cleats 35 which each have the form of a comb, support and guide the terminal leads 34 circumferentially, spaced from one another, to a certain location at the top from which the leads are taken and connected to terminals above. Those terminals are formed by the lower ends of busbars (56 to 58, 61 to 69) which extend through and which are supported by a structural panel of insulating material which forms an insulating barrier between the ends of those busbars.

Abstract: Since a structure of a cooling fan of an alternative current generator for a vehicle is formed with a resin molding product having an insert metal fitting, a freedom degree on said fan design shape configuration and said installation performance of said fan to a core can be compatible. A cooling fan structure having a high shape configuration design freedom degree and having an installation strength similar to that of said fan according to said prior art can be obtained.

Abstract: In a generator with a cooling system which draws in, from the generator, cooling medium heated by the heat-generating elements of the generator and which guides the hot cooling medium to at least two cooling units (23), which cooling units (23) operate in parallel and cool the cooling medium before it is led back to the heat-generating elements of the generator, operation substantially uninfluenced by failures of the cooling units (23) is made possible by means being provided which mix together the cooling medium flows (31) flowing from the different cooling units (23) after they emerge from the cooling units (23) and before they are supplied to the heat-generating elements of the generator.

Abstract: A vacuum generating apparatus for a vacuum cleaner is provided, in which an axial type coreless brushless direct-current (DC) motor is implemented in the form of a rotor-impeller integration structure. The vacuum generating apparatus includes an axial type brushless DC motor in which disc-shaped upper and lower rotors are symmetrically disposed facing the upper and lower portions of a disc-shaped stator at either end of a rotating shaft rotatably supported in the inner circumferential portion of the stator, upper and lower impellers integrally fixed in the upper and lower rotors, respectively, and upper and lower housings whose outer circumferential portions are combined with the outer circumferential portions of the respective disc-shaped stator such that air sucked via sucking inlets formed at the center of the housings is guided to a discharging outlet together with the stator. A single rotor structure can also be adopted.

Abstract: A household fan with motor and motor housing for shielding the motor. The electric motor is preferably a four-pole permanent-split capacitor motor with a narrow profile enabling it to fit within a narrow box fan, the motor having a stator including a core of stacked laminations. A first outermost lamination defines a first supporting surface, and a second outermost lamination defines a second supporting surface on which the front and rear casings are supported. Copper windings are wound about the core. A rotor has an output shaft which passes through a central region of the core. The front and rear casings are generally dome-shaped. Each casing has a circumferential side wall and a vented end wall. The front casing has a recessed area around the opening for the output shaft such that a portion of the bladed propeller assembly protrudes within the recessed area, allowing for a narrow profile design. Radially extending legs allow for mounting on parallel brackets along a rear grill of the fan.

Abstract: A gas-fired forced draft air heating furnace is provided with a specially designed self-cooling draft inducer fan that overlies an inshot-type burner section of the furnace and is operatively supported on a heat exchanger plenum portion of the furnace housing. The fan motor is supported on an outboard housing side of the fan, and an umbrella cooling fan is coaxially secured to an outboard end of the fan drive shaft. During operation of the draft inducer fan, the umbrella fan is rotationally driven to direct a flow of ambient cooling air toward the outboard side of the draft inducer fan housing in a manner causing the air flow to sequentially contact and cool the outer shaft end bearing area, the motor windings and the inner shaft end bearing area at the outer side of the draft inducer fan housing.

Abstract: A shaftless rotor (12) for a dynamoelectric machine includes a stack (20) of ferrous laminations (22) provided with a central opening (110) extending through the stack (20) and adapted to be located on the axis of rotation (14) of the rotor (12). A sleeve (112) is located in the central opening (110) for orienting the laminations (22) with respect to one another. Manifold and vane clamping pieces (52) are located on opposite sides of the stack (20) and engage the endmost laminations (22) and the sleeve (112). A pair of spaced shaft segments (24,26) engage respective ones of the clamping pieces (52) and a single tie bolt (32) extends through the sleeve (112) between the shaft segments (24,26) to interconnect the same. The tie bolt is in tension to apply clamping force to the shaft segments (24,26) for transmittal to the clamp pieces (52) to the laminations (22) in the stack (20).

Abstract: A DC driven fan with blades made of magnetized material and permanently magnetized in the radial direction and cooperating with a plurality of electromagnetic stator coils mounted external to the outer fan edges. Adjacent blades have alternate N-S, S-N radial magnetic orientations. In one embodiment, the blades are mounted in a non-ferrous hub and in an alternate embodiment they are mounted in a ferrous hub so that adjacent blades function like a U or V-shaped magnet. Blades can be made of magnetized ferrous, ferromagnetic, or magnetized plastic depending upon the application and blade strength specifications.

Abstract: In order to assure efficient cooling and a temperature balance between the stator and the rotor, an asynchronous electric motor is provided containing a closed cooling liquid circuit which passes successively into the stator (1) and into the shaft (3) of the rotor, over the entire length of the stator and the rotor. A pump (15) is incorporated in the rotor shaft. The liquid is injected into the pump by a stationary axial tube (16) and comes out again between the shaft and this tube. The pump includes a centrifugal pumping member (20) fixed to the bottom of the bore of the shaft, and longitudinal-blades (21) fixed to the shaft facing an external helicoid rib (17) of the injection tube. The liquid is cooled by the ambient air along the periphery of the stator.

Abstract: A bypass motor/fan assembly for use in applications where moisture laden air is encountered. A motor with a motor cooling fan has a fan end bracket received at one end thereof to isolate the motor and motor cooling fan from a working air fan received on the opposite side of the fan end bracket. A diffuser matingly engages with the fan end bracket. The diffuser and fan end bracket have ramped surfaces thereon which are circumferentially aligned with the working air fan. The ramped surfaces define air flow paths of uniform cross section which pass to exhaust ports which are circumferentially spaced about a fan shell which is received over the fan end brackets, diffuser and working air fan. The fan shell has an air intake aperture at an end thereof. Air passes from the air intake aperture, into the eye of the work air fan, and out of the fan at the circumference thereof into the air paths of uniform cross section and to the exhaust ports.

Abstract: A motor-driven tool is provided with a grip on which a switch is placed, and the grip is coupled to the middle of a cylindrical housing which houses a motor in its rear end and a motor output decelerator in front of the motor in its front end. A deceleration rotation output shaft is provided in the front of the housing. The motor houses an axial flow fan for air intake in the rear and a centrifugal fan for exhaust in the front and has intake air openings in the rear side and an exhaust air opening in a front side surface. The cylindrical housing also has an intake opening that connects to the intake air opening in the rear side of the motor and an exhaust opening that connects to the motor exhaust air opening at the position where the front of the motor is located.

Abstract: In a generator which is operated according to the induced-draft-cooling principle and in which a main fan (11), attached to the rotor shaft (12) of the generator, draws cooling medium, which is heated by the heat-generating elements of the generator, out of the generator and transports it essentially perpendicularly to the axis of this rotor shaft (12) to a cooling arrangement (23), the drawn-in cooling medium, which is expelled with a swirl at high velocity by the main fan (11), being received by a cooling-duct casing (33), which directs the cooling medium to the cooling arrangement (23) via at least one fluidic constriction (41), the directing of the cooling medium, while efficiently avoiding vortices and pressure drops, is achieved in that the cooling-duct casing (33) has at least one overflow duct (66), which receives the cooling medium, expelled into the cooling-duct casing (33) by the main fan (11), via an inflow zone (58) upstream of the constriction (41), diverts the cooling medium around the constric

Abstract: Disclosed is a motor and pump which operate completely submerged in the pump fluid which uses surrounding fluid to cool the heat generated within the motor. The motor is also built with the intention that it can run in non-submerged applications by placing a cooling jacket around the stator portion of the motor and passing a cooling fluid through the jacket to absorb the motor heat. The cooling system disclosed is such that it can be filled with a fluid circulated within the system but not in direct contact with the fluid being pumped within the pump. Preferably the cooling system includes a flow control tube for use in controlling the flow rate of the cooling liquid and an expansion tank for use in limiting the pressure of the cooling fluid in the cooling system.

Abstract: The motor and the heat sink apparatus using the motor according to the present invention include a frame having a cup-shaped frame housing; a stator mounted to an outer circumference of the frame housing; a sleeve fitted into the frame housing such that one end of the sleeve is supported on a seat formed inside the frame housing; a shaft rotatably fitted into the sleeve; a rotor having a magnet disposed opposite to the stator; oil filled into a clearance between the shaft and the sleeve; and a fixing ring inserted into the frame housing to hold the sleeve against the seat. Because the sleeve is fixedly sandwiched between the seat and the fixing ring, the stress acting on the sleeve in the radial direction is reduced, preventing an inner diameter deformation of the sleeve. This in turn produces a quiet motor with a long life and a heat sink apparatus incorporating this motor which is small, quiet, of long-life and excellent in cooling efficiency.

Abstract: A bushing for combining a fan and heat sink avoids a rack usually required in a conventional combination of fan and heat sink for CPU cooling, and thereby minimizes assembly height and forms a super-thin heat dispersion mechanism. A honeycomb heat sink is designed to increase heat dispersion area for a better heat dispersion efficacy, and a fan body can be fixed at the heat sink directly in virtue of the bushing construction.

Abstract: A motor cooling and sound absorbing system includes a housing (10) forming a chamber (13) around a motor (11). The shaft (12) of the motor (11) carries a fan (40) positioned in a chamber (38) formed by a recess (36) cut in a foam block (35). The fan (40) draws air into the chamber (13) through inlet apertures (33) in the housing (10) and this air is directed past the motor (11) to cool it. The air exits the fan (40) generally radially against an angled surface (37) of the recess (36) of the foam block (35). The air is then received in a diffuser passageway (41) defined by the angled surface (37) and an angled surface (42) of a choke plate (19) positioned above the foam block (35). The diffuser passageway (41) reduces the velocity of the air to assist the foam block (35) in absorbing the noise generated thereby, while at the same time reducing the pressure at the exit of the fan (40) to increase the cooling air flow past the motor (11).

Abstract: A centrifugal fan for a motor vehicle has a fan rotor driven in rotation by an electric motor and lodged in a central part of a casing. The outer walls of the casing define, in conjunction with a peripheral portion of the rotor, a volute for channeling air which is delivered by the rotor in a tangential direction. The outer wall of the casing includes a longitudinal side wall portion formed with through apertures constituting diversion ports, for taking off some of the air delivered by the rotor and diverting this air through an external duct fixed to the casing and open into the central region of the latter, so as to cool the motor.

Abstract: A pump including a pump casing having an inlet and an outlet, and an impeller having a rotary axis and being rotatably mounted within the pump casing for rotation about the rotary axis is provided. The impeller is configured and positioned relative to the pump casing so that the rotation of the impeller is effective to urge fluid from the inlet to flow through the outlet. A rotor assembly, coupled to and rotatable with the impeller, is provided with a plurality of permanent magnetic poles which are arranged in a generally flat array. A stator assembly is spaced apart from and generally facing the generally flat array of magnetic poles and includes a stator and a plurality of magnetic windings positioned and adapted to effect rotation of the rotor and the impeller upon energization thereof. A bulkhead is positioned between the rotor and the stator. The bulkhead includes a centrally located mounting feature.

Abstract: In an electric motor which includes an electronic control device and an armature within a closed motor casing, the electronic control device is arranged within the casing, in a position offset axially from but close to the armature. The motor includes a thermal screen which is interposed axially between the armature and the control device, and the screen includes means for dissipating heat outside the casing.

Abstract: In an alternating current generator and fans thereof in accordance with the invention, the cooling efficiency of the alternating current is improved by fans fixed to a rotor. When the fans are formed during a press working operation, the blades are formed directly from the fans by cut-raising the fans toward a bracket side to form blades and simultaneously cut-raising protruding portions toward a rotor side to form protrusions. This design allows for both improvement in cooling efficiency of the alternating current generator and ease of manufacture of the fans.

Abstract: An improved design for a switched reluctance motor is disclosed that keeps the motor cool during operation and thereby improves the performance and reliability of the motor. The improved design employs three centrifugal fans mounted to the motor shaft, which are used to create two independent airflow paths, one of which cools the electronic components of the motor. The improved design also divides the functions performed by a single printed circuit board into two circuit boards, an upper circuit board and a lower circuit board. Another feature of the improved design includes locating the position/speed sensing encoder immediately below one of the centrifugal cooling fans. The disclosed construction provides for increased dissipation of heat that is generated by the motor and its electronic components. In this configuration, the printed circuit boards and other electronic components are located in such a manner that air can be circulated in a path to remove heat from these components.

Abstract: A frame for the housing of an electric motor having a top cavity that extends axially along the upper interior portion of the frame and beneath the top wall of the frame. The top cavity functions as a conduit box through which access is provided to the electrical leads of the motor, thus eliminating the need for a separate conduit box attached to the exterior of the housing. The frame also includes an axially extending, corner channel along each of its four corners. The frame is adaptable for both closed and open housing cooling arrangements.

Abstract: The hydraulic components of a cooling circuit for a dynamoelectric machine are eliminated in a totally air cooled dynamoelectric machine which includes a rotor (12) rotatable about an axis (14) and including a central stack (20) of ferrous laminations (22) defining a plurality of radially outwardly directed circumferentially spaced poles (132), spaced shaft ends (24,26) on the axis (14) and extending from opposite sides of the stack (20) and a first air passage (46) in the stack (20). Magnetic journal bearings (54,56) and a magnetic thrust bearing (58,60) are provided for the shaft segments (24,26) and impellers (62) are located on opposite sides of the stack (20). A stator (16) surrounds the rotor (12) and includes windings (76) connected by end turns (94) located exteriorally of the stator (16).

Abstract: A motor-driven tool is provided with a grip on which a switch is placed, and the grip is coupled to the middle of a cylindrical housing which houses a motor in its rear end and a motor output decelerator in front of the motor in its front end. A deceleration rotation output shaft is provided in the front of the housing. The motor houses an axial flow fan for air intake in the rear and a centrifugal fan for exhaust in the front and has intake air openings in the rear side and an exhaust air opening in a front side surface. The cylindrical housing also has an intake opening that connects to the intake air opening in the rear side of the motor and an exhaust opening that connects to the motor exhaust air opening at the position where the front of the motor is located.

Abstract: An electrical machine has a stator, and a rotor defining an axis of rotation, the stator including laminations located along that axis, the laminations having protrusions, the protrusions on each lamination being circularly spaced apart about the axis to define cooling air flow passages, and a fan mounted on the rotor to effect flow of cooling air into and through such passages as the rotor rotates.

Abstract: A vehicle alternator is provided with a metal plate 133a to allow a resin fan 133 to be secured to an end surface of a polar core by welding. The metal plate may comprise an flat annular plate insertion molded into the resin fan, or disks disposed in a circle concentric to the resin fan, which is insertion molded into the resin fan an annular flange portion 343b which clamps the resin fan to the polar core and a cylindrical portion 343a may be provided, or a flange portion 443b and a cylindrical portion 443a may be provided. An annular flange portion 543b which clamps the resin fan to the polar core and a hollow cylindrical portion 543a and a flat annular plate portion 543d which extends radially inwards therefrom may be provided.

Abstract: A compact engine-operated generator unit having a high soundproof effect in which a generator thereof can be cooled efficiently as well as an engine and a muffler thereof. The engine-operated generator has an engine and a generator driven by the engine arranged in a row with a common rotary axis and accommodated in a soundproof case.

Abstract: An alternator for a vehicle which maintains or improves the cooling performance and which reduces the fan noise caused by the interference between the cooling winds and the stator windings. An armature coil provided on a stator of the alternator includes an X-phase coil group, a Y-phase coil group, and a Z-phase coil group. Coil end groups are sets of coil ends forming bridge wires between slots. The coil end groups have stationary blade shapes which form passages for the cooling winds directed from a cooling fan on a rotor toward outlets in a frame. The sound of the interference between the cooling winds and the coil end groups is reduced while the cooling performance is enhanced.

Abstract: An alternator disposed in the engine compartment of a vehicle is composed of a rotor having magnetic poles and a field coil, a cooling fan member, a stator disposed around the rotor and having a stator core and a multi-phase stator winding. The multi-phase stator winding has a plurality of conductor segments each having a U-turn portion to form a first coil-end group and a pair of joint portions to form a second coil-end group. The first coil-end group is disposed where temperature is higher than the other end, and the second coil-end group is disposed on the other end. The cooling fan member sends less cooling air to the second coil-end group than the first coil-end group.