Abstract: A motor has a stator disposed between a casing and a cap. The casing has a ring and four frame members formed together. Four posts are formed on the cap. The stator has an induction coil and a rotor is rotatedly disposed in the center of the stator. A shaft is fixed to the center of the rotor. The casing, the stator and the cap are fixed together by four screws. The cap and the casing are opened so that the motor has an excellent heat dissipation rate.

Abstract: An axially short solenoid type electric generator comprising a stator attached on the inner circumferential surface of the left half of a short cylindrical case, and a rotor accommodated within the right half of the case. The stator comprises U-shaped magnetic metal blocks attached along the inner circumferential surface of the left half of the case, angularly separated at predetermined intervals, an output conductor (coil) wound in a short solenoid through the slots of the blocks, and magnetic short circuit blocks disposed between the channel-shaped blocks. The rotor comprises a centrifugal fan, a cylindrical supporter, U-shaped magnetic material blocks attached around the cylindrical supporter, and a field coil wound through the slots of opposing U-shaped blocks. The electric generator reduces the resistance loss of the coils, and the eddy current loss and hysteresis loss of the magnetic metals.

Abstract: A dual-face, internally-mounted cooling fan is provided in a dynamoelectric machine, e.g. an alternating current generator. The generator includes a ventilated housing supporting a stator assembly and a rotor assembly. The fan includes a divider disk having a plurality of blades provided on each surface and is mounted to rotate with the rotor assembly. As the fan is rotated, a plurality of separate air currents are drawn axially into the housing for cooling. The divider disk prohibits substantial mixing of currents drawn from opposite ends before they are radially expelled from the housing.

Abstract: In an axial magnet bearing having an axial bearing disc, the axial bearing disc is constructed as a fan impeller for conveying a gaseous coolant. In this way, an effective cooling of the magnet bearing is achieved with a simple structure and, at the same time, it is possible to cool further heat-releasing elements, assemblies or units with the aid of a coolant flow promoted by the axial bearing disc.

Abstract: An electromotor, in particular a drive motor for a barrel or container pump, having an outwardly encapsuled motor housing made of a material having good heat conducting characteristics, such as aluminium. The motor housing is provided on its outer side with a shield of an electrically non-conducting material. The shield is surrounded on its outer side with a mantle which forms, with the housing middle portion, a through-stream gap for the passage of cooling air. This outer mantle includes a pair of housing caps, which overlap the end-support shields of the motor housing, and between which housing caps there extends the mantle which shields the outer surface of the housing middle portion by forming the through-stream gap for the passage of cooling air. The outer shielding of the entire motor housing prevents contact with metallic parts and thereby current conducting parts of the motor by a person servicing the device.

Abstract: A disk-type single-phase brushless motor wherein a reluctance torque having a sufficient magnitude can be generated to assure self-starting and continued rotation of the motor and production of disagreeable noises is minimized. The motor comprises a stator yoke mounted in an opposing relationship to a magnet rotor with an axial air gap left therebetween. The magnet rotor has an equal circumferential pole width .theta.. The stator yoke has a cutaway portion formed therein for enabling self-starting of the motor. The cutaway portion has a specific shape including a first radially extending edge and a second edge extending in a predetermined angular relationship from an inner end of the first edge to an outer circumferential edge of the stator yoke.

Abstract: A brushless alternator for an engine-generator set has a housing for mounting to the engine. Raised ribs define an internal bore of the housing, the bore having a constant diameter to mount the stator and the exciter field assembly, both of which have the same laminations. The ribs also define cooling air flow paths through the housing. A fan is mounted outside of the housing at the free end of the housing to draw air into the engine end, through the housing and out the free end.

Abstract: In an air-cooled type cooling system for an engine working machine assembly in which a working machine such as a generator, a compressor and the like is adapted to be driven by an internal combustion engine, there are provided an air-cooled engine, a working machine and an exhaust muffler in a machine area as well as a centrifugal cooling fan in a fan room within a casing. An exhaust air outlet passage and an exhaust air conduction passage are provided in such a manner as to come out in parallel from the periphery of the fan area. Part of the cooling air sucked into the fan area after cooling the engine and the working machine in the machine area is adapted to be discharged directly outside the casing through the exhaust air outlet passage, and the remaining part thereof is adapted to be discharged outside the casing through the exhaust air conduction passage after cooling the exhaust muffler.

Abstract: There is provided a totally enclosed electric motor which is effectively cooled by means of an internal ventilation system and an external ventilation system. The internal ventilation system includes an internal fan driven by the rotor which forces internal ventilating air into and along an annular series of longitudinal internal ducts arranged adjacent to the internal cylindrical wall supporting the stator. The internal ventilating air leaving the internal ducts enters a brush compartment where the air is directed axially over the commutator and through the stator-rotor arrangement and back to the internal fan. The external ventilation system includes an external fan driven by the rotor which forces external ventilating air from the atmosphere into and along an annular series of longitudinal external ducts arranged radially outwardly from the series of internal ducts and into exhaust compartments at the far axial end of the motor.

Abstract: An electric motor ventilation structure having an interior fan with a dual concentric set of radially disposed blades located within an endshield of said motor in close proximity to the end of the rotor and stator assemblies within said endshield and to the other peripheral surfaces of said stator assembly within that endshield. The disposition of said blades is such as to break the hot air boundary layer adjacent to each of said windings and cause the movement of heated air through the axial and radial endshield apertures to the external environment and replenishment with cooler air from that environment during motor operation.

Abstract: A fan drive and water slinger seal for a vertically mounted electrical motor. A fan is placed on a motor shaft so opposing flats on the interior surface of the fan hub fan mater with corresponding flats on the shaft to prevent slippage between the fan and shaft during motor operation. The hub contains a spring like finger extending upward axially along a groove in the inner wall of the hub and engaging an annular groove on the shaft to prevent axial movement of the fan along the shaft. The fan is positioned between a motor endshield and an overlying drip pan which encircles the shaft and carries liquid away from the motor. A flexible slinger snugly and adheringly fits on the shaft and has an O-ring type interior seal for sealing within a second annular groove on the motor shaft.

Abstract: A dynamoelectric machine has a housing and a rotor assembly including a rotatable non-stepped shaft which projects through an opening in an end wall of the housing. A fan moves air through the machine to ventilate it and keep it cool. The fan is secured to an end of the shaft extending through the opening by a tab fitting in a groove formed in the shaft and a retention ring fitting over a hub portion of the fan in which the tab is formed.

Abstract: A motor assembly for use in combination with an air handling system such as an automotive blower system for supplying cooling or heating air to a passenger compartment of an automobile. The assembly comprises a support member which is adapted to be mounted on the air handling system. Stationary and annular rotatable assemblies are mounted on one side of the support plate and a printed circuit board including a motor control circuit is mounted on the other side thereof. The stationary assembly has a plurality of winding stages adapted to be electrically energized to generate an electromagnetic field. The annular rotatable assembly has a plurality of permanent magnet elements surrounding the stationary assembly and is adapted to engage a squirrel cage fan for moving air in the air handling system.

Abstract: In an electric motor having a stator with end turn windings on opposed faces thereof and a rotor and shaft extending through the stator, an improved motor cooling arrangement including a baffled cage-like fan separately and proximally surrounding the end turns on one face of the stator and a particulate trap mounted on the shaft in cooperation with the baffled cage-like fan.

Abstract: An electric motor and pump mounting bracket assembly comprising an electric motor and a bracket fastened to the motor for supporting a pump which is driven by the shaft of the electric motor. The electric motor comprises a cylindrical shell which encircles the stator of the motor and a pair of end members engage surfaces on the shell which are accurately positioned longitudinally of the shell relative to one another and relative to the axis of the shell. The end members rotatably support a shaft in concentric relation to the shell. The pump mounting bracket includes a planar surface that is accurately located parallel to and a predetermined accurate distance from the centerline of the shell to form the mounting surface for the pump. The bracket further includes an opening through which the connecting link to the shaft of the motor extends. The accurate surfaces on shell are in predetermined longitudinally spaced relation to the centerline of the opening in the bracket.

Abstract: An apparatus for pumping fluid such as an integral pump/motor is provided. A housing having an inlet and an outlet has a rotatable assembly including an impeller located within and adapted to rotate within the housing to move fluid through the housing from the inlet to the outlet. Secured to the exterior of the housing is a stationary assembly for applying an electromagnetic field through the housing to and around the impeller to rotate the impeller and thereby to cause it to move fluid through the housing.The apparatus is for use in a cooling system, such as a cooling system of an automobile engine, to pump fluid through the cooling system. A temperature sensor is provided for sensing the temperature of the fluid within the cooling system. An electronic control, responsive to the temperature sensor, supplies electrical power to stationary assembly.Also, a method of circulating fluid within a system, such as a cooling system of an automobile engine, is disclosed.

Abstract: In a self-ventilated electric motor such as utilized in a textile spinning mill machine, a fan cowling and cover plate are arranged to define a ventilating air flow pathway by respective support members which are disposed entirely outside the pathway to prevent accumulation of lint and debris on the support members.

Abstract: A rectifier in an alternating current generator for automotive vehicles is disclosed, which comprises a pair of conductive radiators for positive and negative sides, each having embedded therein diode chips arranged in a juxtaposed fashion, an insulated substrate facing the radiators and equipped with a terminal board to be connected with each of lead wires from corresponding diode chips, and cooling fins provided on each of the raidators, and a cooling fan provided on a rotor core for cooling the rectifier, the rectifier being positioned in air course in which air for cooling the radiators is introduced into the inside of the generator from the outside of a case bracket of the generator through air intake ports by the action of cooling fan such that radiators are placed in the radial direction in parallel relation to each other in the air course so that the insulating substrate is placed downstream in the air course.

Abstract: In an electric motor including a rotor on which is mounted a blower and a centrifugal actuator having spring-loaded lever members projecting through a centrally disposed recess in the spaced radial blade carrying back plate of the blower, an improved cover assembly arranged to be mounted on the rotor in interfitting relation with the spaced radial blades of the blower to cover the centrally disposed recess preventing contaminant build-up on the centrifugal actuator.

Abstract: A water-resistant fan motor has a water spray deflector which includes a closed central portion fan blade and a closed, convex, coaxial deflector between the fan blade and the motor housing. This convex deflector establishes a first small gap between the periphery of the rotatable convex deflector and a portion of the housing substantially at the outer diameter thereof. A second small gap between a portion of the rotor and a portion of the housing is unaligned with the first small gap and an enlarged cavity is in series between the first and second small gaps. This construction establishes a labyrinth for any water spray, and hence inhibits any water spray entering the interior of the motor housing. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A hermetic dynamic machine has a main part supporting a rotor shaft and having a main part cooler, an external fan provided on one end of the rotor shaft, an end cover which covers the end of the main part adjacent to the external fan and having a cooling air inlet formed therein, a bearing provided on the portion of the rotor shaft adjacent to the external fan. The dynamic machine further has a cooling air system which is constituted by a first cooling air passage for guiding the flow of the cooling air from the air inlet to the external fan, a second cooling air passage through which air for cooling the bearing flows and a third cooling air passage through which cooling air from the external fan is introduced into the main part cooler. A first connecting pipe provides a communication between the first and second cooling air passages, while a second connecting pipe provides communication between the second and third cooling air passages.

Abstract: An explosion-proof electrical generator includes a generally toroidal casing with one open end and a central circular end wall or plate or cylindrical fan-containing cup extending across and closing the center of the torus; a circular cover closing the open end of the casing; a stator defined by laminated plates and windings located in the annular recess of the casing; and a rotor mounted in the cover and including a shaft, and a bowl-shaped cup carrying a ring of permanent magnets in its side wall, which extends into the casing recess between the stator and the outer side wall of the casing. Cooling fins are provided on the casing and cover for dissipating heat produced in the generator. The generator has a circuitous or small interior flame path for reducing flame temperature and thus the likelihood of fire or explosion outside of the generator.

Abstract: A disk brake motor comprises an electric motor having a housing, an electromagnet, at least one friction surface and a brake wheel which is in contact with the friction surface during braking, the brake wheel including an impeller for drawing in and impelling air so that the air flows tangentially of a surface of the electromagnet into the brake wheel and past the friction surface onto a surface of the housing of the electric motor.

Abstract: An alternate current generator having a housing consisting of directly coupled frame pieces and a stator core fixed directly to the inside surface of one of said frame pieces and a pair of fans fixed to the side surfaces of the pole cores of the rotor, mainly in order to increase the structural strength and the cooling efficiency of the generator. The housing is dimensioned such that stator windings receive a maximum of cooling air.

Abstract: An electrical motor system is provided in which driver means position the motor, control the speed of the motor and control the current delivered to the windings of the motor. The operating parameters of the system are sensed on a moment by moment basis and data concerning these operating parameters is provided to a memory. A user has the ability to provide a plurality of user-stipulated operating parameters during use of the motor system. The user-stipulated operating parameters are sensed on a moment by moment basis and data concerning the user-stipulated operating parameters is provided to the memory. The memory contains limiting parameters, sensed operating parameters and user-stipulated operating parameters and a set of adaptive programs for determining the relationship between these parameters. The various parameters are fed to a computer which operates with them, via the adaptive programs, to create, on a moment by moment basis, a new set of operational limiting parameters.

Abstract: An electric motor and gearbox unit, wherein the gearbox comprises a casing having an integral bearing support for the motor shaft and an epicyclic gear train within the casing, the output shaft of the gearbox being precisely aligned with the motor shaft. The gearbox can be symmetrically designed with respect to the motor axis so that a fan mounted on the motor shaft can create a symmetrical flow of cooling air over the gearbox casing and into the motor. Preferably, the epicyclic gear train comprises a sun gear on the motor shaft, a ring gear integral with the gearbox casing, and a plurality of planet gears that mesh with the sun gear and the ring gear and which are each mounted for rotation with respect to a planet carrier connected to the output shaft of the gearbox. The planet carrier has to be provided with a number of holes, one being a central hole for receiving the output shaft of the gearbox and the others being for receiving stub axles for mounting the planet gears.

Abstract: An alternator for use in an automobile which includes two cooling fans, rear and front, rotatable with the rotor shaft disposed on opposed sides of the rotor, which cooling fans are received in front and rear brackets, respectively. The brackets have inlet ports and outlet ports through which drafts of cooling air are to be drawn in and out of the inner cavity of the alternator through rotation of the fans, attaining cooling of necessary parts e.g. a stator winding, rotor exciting winding, rectifier diode, etc. It is uniquely designed that the one fan on the front side has a suction capacity greater than that of the other fan on the rear side, causing a negative pressure differential between the two suction sections of cooling fans. This results in an additional axial flow of cooling air directed from the rear to the front which contributes to improvement of cooling efficiency for the rectifier diode and rotor exciting winding.

Abstract: An induction motor comprises a stator and rotor totally enclosed in a case with no air communication through the case, an internal shaft mounted fan at each end of the rotor and an external fan and fan shield at one end to direct cooling air along the outer surface of the case. The motor is further provided with hollow, toroidal baffles internally at each end which force the air within the case at each end of the motor to be circulated across the bearing and ends of the windings to pick up heat and along the internal surface of the case to exchange the heat through the case with the fan driven outside air. A further improvement is the provision of an air channel from the fan shield along the outer surface of the case to the other end of the motor and radial ducts from the channel to the interior of the baffle and from the opposite side of the baffle to the case, whereby a portion of the fan driven external cooling air is forced through the interior of the driving end baffle.

Abstract: A friction braking system located entirely inside an induction motor of an appliance quickly stops rotation of the rotor in the appliance motor, for example such as a food processor, whenever the A.C. electrical power is turned off. Thus, rotation of any tool being operated in the appliance is quickly stopped, whenever the electrical power is interrupted. The rotor in the induction motor is axially slidably mounted on the motor shaft and is keyed to the shaft for permitting axial shifting displacement of the rotor relative to the stator while preventing any angular displacement of the rotor relative to the shaft. Consequently, the rotor and shaft always turn and stop as a function unit. A friction brake lining is affixed within the motor housing offset from the axis of the motor shaft as far as practicable. A disc brake mounted onto the rotor has an annular friction braking surface positioned for engagement against the brake lining.

Abstract: In an apparatus for noise reduction and damping in ventilators of electric machines, in particular vehicular alternators, it is proposed that the ventilator support on the rotor shaft be effected by axially staggering inner rubber inlays on both sides and providing adjoining outer spring pressure elements such that the ventilator region is clamped, at least in the axial direction and preferably radially as well with an additional rubber ring. As a result, the transfer of resonant vibrations of the rotor to the ventilator are reliably avoided, and the noise emissions are decisively reduced.

Abstract: An electric motor including an integral ferrofluid bearing provides significant reduction in non-repeatable runout, stray flux, and audible noise over conventional motors using ball bearings. The motor includes a hub and a base, with the base attached to a tapered magnetically permeable shaft which defines an inner bearing race, and the hub attached to an internally tapered, magnetically permeable sleeve which defines an outer bearing race. Permanent magnets surround and are rotatable with the sleeve to provide mangetic fields which interact with the stator winding to cause rotation of the hub and sleeve. In addition, the permanent magnets form magnetic flux paths with the shaft and the sleeve to maintain ferrofluid lubricant between the inner and outer bearing races.

Abstract: A pinion shaft starter for internal combustion engines having its pinion coupled to the shaft of the starter motor through an overruning clutch is disclosed in which a dividing wall member is mounted to define in the starter housing a first chamber located on the side of the pinion and a second chamber on the side of the starter motor, with a dust discharging vent formed in the first chamber, at a circumferential point externally of the wall member. The wall member is provided to encircle the external circumference of the overrunning clutch regardless of the position of the clutch which is axially moved by the solenoid switch to bring the pinion into or out of engagement with the ring gear on the flywheel through an opening formed in the starter housing. To insure sealing between the outside clutch circumference and wall member, an annular ring is provided along the inside periphery of the wall member.

Abstract: A method is provided of securing a stator in an electrical machine which includes a casing, a rotor mounted within the casing and a stator which is axially slidable with respect to the casing. The method comprises the steps of wedging the stator in position by means of co-operating annular chamfer surfaces formed in mounting rings located at each end of the stator which co-operate with opposed chamfer surfaces formed on a plurality of mounting bars and a hollow cylindrical sleeve both of which form part of the casing. When the casing and stator assembly is pressed together, such as when the end plates of the motor are secured to the casing, the stator is wedged in position between the chamfer surfaces. The method can be utilized for reconditioning existing motors.

Abstract: An inexpensive semi enclosed alternator provides high power prolonged operation in environments having particle contamination in the ambient atmosphere. An alternator housing has front and rear housing portions, and a drive shaft carrying a rotor assembly is within the housing. A drive shaft extension from the housing holds a fan assembly. The rear housing portion has cylindrical sidewalls joined to a closed end portion 27 and forms an air sealed cavity except for an open end facing the front housing portion. The front housing portion comprises cylindrical sidewalls, having through-openings therein, which terminate in a first end opening 31, facing rear housing open end 28, and a substantially open second end opening 30 facing the fan assembly and the ambient atmosphere. Preferably rotor and stator assemblies, and rectifying diodes, are positioned within the housing substantially between the through openings and the closed end portion of the rear housing.

Abstract: An improved electric motor ventilation structure including a "pull through" fan associated with a motor endshield including a shaft for supporting a fan on one end thereof, and defining a preselectively spaced and contoured air inlet and air circulating chamber adjacent the stator and rotor assembly of the electric motor to cause the circulating air to break the "hot" boundary layer of air immediately adjacent the motor windings.

Abstract: A rotary electrical machine is disclosed in which a cylindrical portion is provided at the outer surface of at least one of a pair of claw-shaped poles, and a cooling blade is positioned and fitted to the cylindrical portion through an opening formed in the cooling blade, concentrically with respect to the cylindrical portion, and fixed to the claw-shaped pole by caulking and welding.

Abstract: A motor cooling fan housing for a by-pass vacuum motor is presented. The fan housing includes a top plate connected to a cylindrical side portion. The top plate is characterized by a plurality of uniformly spaced tear-drop shaped slots therein. The slots provide for the entry of cooling air to the motor maintained therein. The slots are elongated and have a major axis which is non-collinear with the center point of the top plate of the housing.

Abstract: An oil scavenge system for use in a generator or the like which includes a housing having a plurality of isolated compartments into which oil may leak from the coolant flow passages of the generator. A plurality of fluid jet pumps are mounted in respective internal cavities about the housing of the generator. At least one internal passageway in the housing communicates each isolated compartment with one of the fluid jet pumps, whereby oil leaking into a compartment can be withdrawn therefrom by the respective jet pump. An internal conduit in the housing delivers oil under pressure to each fluid jet pump for operating the pump. An internal flow passage in the housing from the jet pump returns the oil to an engine gearbox pump.

Abstract: A molded plastic housing for a small electric motor having a radial end wall and an axially projecting portion for mounting the stator and journalling the motor shaft. An annular stator is mounted on and about the projecting portion and shaft bearings are mounted in axially spaced relationship in interference fit respectively at end sections of the housing portion and in direct engagement with the molded plastic. Reduced diameter and reduced thickness zones at the end sections provide for resilient and firm bearing retention and alignment. Four (4) circumaxially spaced slots at each end section with flats radially inwardly thereof provide for the reduced thickness and reduced diameter. The bearings engage the flats in an interference fit.

Abstract: A ventilating arrangement for a vehicle generator is proposed where a rotor-stator unit is arranged in a housing equipped with air-guiding ducts. A fan wheel is connected in front of this rotor-stator unit which by means of a pulley is drivingly held on a shaft of the rotor. The pulley is developed as an air delivery wheel and comprises supporting ribs forming radial guide blades. The air delivery wheel serves to partially compress and assist the air flow to the fan wheel.

Abstract: A fan motor having a fan frame, a portion of which is formed by the extension of a motor base member on which a rotor axis bearing, a stator, a cup-shaped housing and another fan frame portion are mounted and a fan fixed on the rotor axis and incorporated in a space formed by both fan frame portions.

Abstract: A charging generator for a vehicle has a cooling means for a stator coil and a bearing held at the front bracket side in addition to a cooling means for the rear bracket. A partition plate is provided in the front bracket to separate a window for cooling into an air intake window and an air discharge window, and air is sucked from the air intake window to be discharged through the air discharge window in which the front bearing and the front side coil are cooled.

Abstract: The control circuitry of a brushless blower motor is mounted on the stator of the motor and is cooled during operation of the blower by a portion of the air moved by the blower. A rotor cup member which covers and protects the control circuitry has at least a pair of radially displaced openings formed therein, and air is conveyed through the openings due to an air pressure differential therebetween created by the movement of air by the blower.

Abstract: A pancake, d.c., brushless electric motor 10 and pump 32 in which the rotating parts of the pump 32 are integral with the rotor 18 of the motor 10. The motor and pump housing is hermetically sealed from the flow of the pumped fluid. A small portion of fluid is leaked through a seal 38 and acts to cool the motor 10 and to lubricate a sleeve bearing 24 which supports the rotor 18 on the motor's stationary shaft 26. The rotor 18 has permanent magnets 22 divided into two sets which lie on opposite sides of the poles of the stator coils 14 and, therefore, the magnetic thrust between stator and rotor is balanced out.

Abstract: Cooling air is introduced through an opening in a wall portion of the motor housing radially opposing the commutator. A deflecting surface is provided for deflecting the cooling air entering the motor through the opening away from the commutator and toward the armature so as to prevent direct contact of dust and moisture in the cooling air with the commutator.

Abstract: A brushless d.c. motor is equipped with a stator armature, which is composed of a stator yoke and at least one armature coil arranged on the stator yoke, and a 2p(p: a positive integer of 1 or more)-pole magnetic rotor facing the stator armature, rotatable relative to the stator armature and having alternating N and S poles. The motor can self-start by utilizing a cogging torque produced upon feeding a direct current to a position sensor. The stator yoke defines at such a point as permitting self-starting of the magnet rotor a cut-off portion of such a shape that ensures the self-starting of the magnet rotor and provides an ideal composite torque curve. The brushless d.c. motor enjoys easy assembly work, low manufacturing cost, compact size, good performance, good mass productivity, etc. It is suited particularly as a disk-type brushless motor or disk-type burshless fan motor.

Abstract: The fan motor according to this invention is made of a base plate in the form of almost square plate. At a center of the base is provided a large enough opening. Within the central opening are mounted radially extending fixed blades, and at a center of the fixed blades a stator of the electric motor is fixed. On the other hand, to a rotor of the motor movable blades are fixed, so that the movable blades face the fixed blades. In this structure, the fixed blades serve also as holding or supporting members for the motor, and increases the airflow as well as the efficiency of the fan motor. Since the base and the fixed blades are made integral with each other by molding synthetic resin material, the number of parts as well as the assembly processes can much be reduced, thus enabling to reduce the manufacturing cost.

Abstract: A dynamoelectric machine having a rotor formed from a continuous strip of ferrous material and a continuous helically formed conductor thereon. The rotor having a rectangular cross section is mounted on the periphery of a web member. The web member is axially mounted for rotation about a frame and supports a fan. The stator of the machine is axially aligned with the outer circumferential surface of the rotor and provides support for pairs of permanent magnets and an equal number of pairs of brushes. The field magnets are positioned to magnetically link with the winding on the rotor. The brushes are equally and angularly spaced in the frame and operative contact with a commutator integrally formed with the rotor winding.

Abstract: A rotor for an alternating current generator in which the rotor shaft carries a pair of pole members and a core member. A spool that is formed of electrical insulating material is carried by the core member and has ribs that fit within slots formed in the core member. The spool supports a field coil, the inner turns of which engage the ribs and portions of the core disposed between the ribs. The rotor shaft supports a cooling fan that is formed of electrical insulating material. The fan is connected to a plurality of posts that extend axially from the spool. The fan supports a pair of lead wires that connect the field coil to the slip rings of a slip ring assembly.

Abstract: A variable output generator for supplying electrical power to a specific load is cooled by a plurality of motor driven fans 112, 113, 114, 115 disposed in a generator pit 2. An appropriate number of motor driven fans for providing cooling air for the generator are energized in response to the instantaneous generator output, to thereby avoid wasteful power consumption.