Abstract: An armature for a motor comprises a winding and a commutator. Each commutator segment has a brush contacting portion and an integral terminal portion connected to a connector portion of the winding. A commutator base includes housings which receive the terminal portions and which have slots for positioning the connector portions of the winding relative to each housing. Each terminal portion has a slot which straddles and grips the connector portion positioned relative to a respective housing. At least one and preferably all terminal portions have two slots arranged side-by-side so that the two side-by-side slots of one of the terminal portions can straddle and grip the lead end and tail end of the winding, respectively.

Abstract: An apparatus for monitoring hydrogen leakage from a generator frame into the stator coil water cooling system. The monitor is designed to alert the operator should leakage exceed a rate of twenty cubic feet per day (20 cfd). A pressure relief valve set at four (4) psig and orifice are provided, along with a second relief valve having a higher setpoint than the first, such that pressure will increase in the holding tank if leakage exceeds 20 cfd setpoint of the orifice. A high pressure alarm, set at a level higher than the first relief valve but less than that of the second, will then sound to alert the operator to protect the system from an overly large or gross failure of the system. By continusouly monitoring a relatively small steady state leakage rate, the operator can be aware of a minor problem which can be corrected at a scheduled maintenance outage, before a gross failure of the system, requiring a costly shutdown of the turbine-generator, would otherwise occur.

Abstract: A permanent magnet rotor has a plurality of holding projections radially outward projected from a yoke secured to outer periphery of a rotor shaft, the projections being extended in axial direction of the shaft and yoke while expanded at tip end portions in circumferential directions, and a plurality of permanent magnet segments respectively disposed between adjacent ones of the holding projections to have gaps remained at least partly in the periphery of the segments, the gaps being filled with a thermosetting resin so that constant positioning of the segments with respect to the yoke can be attained with the resin filled.

Abstract: The electric motor contemplated by this invention includes an armature having two opposed faces mounted on a shaft. The armature is mounted on the shaft intermediate of the ends of the shaft. A pair of commutators are mounted on the shaft adjacent to each of the opposed armature faces. Each of the commutators includes a plurality of commutator bars, each of which has its circumferential width offset relative to the circumferential width of the commutator bars on the other commutator. Alternately or in combinatrion, with the commutator bar offset the brushes in operative engagement with each of the commutators are arranged with their circumferential width offset, relative to the circumferential width of the brushes in operative engagement with the opposite commutator. The electric motor can also be provided with a redundancy capability by a circuit arrangement in which one of the commutators is held as a backup in the event of a failure of the windings of the other commutator.

Abstract: An eddy-current brake comprising a rotor or rotors made of a ferromagnetic material and electromagnets, in which the rotor is so disposed that it crosses the magnetic flux and a braking force is produced by the eddy current generated in the rotor. The rotor is provided with a metallic layer formed from a non-magnetic material having a greater electroconductivity than the rotor, and the coil of each electromagnet is enclosed by a magnetic pole case made of a ferromagnetic material, so that the device is capable of developing a large braking torque and suited for use as an auxiliary brake for vehicles.

Abstract: An optical pulse generator for an electric-motor drive arrangement, especially for a motor vehicle window lifting drive with an electric motor and a flanged transmission is to be provided in a simple manner which improves the operating reliability of the drive arrangement while the overall size is reduced. To this end it is proposed, according to the invention, to arrange a code wheel (1) within the electric-motor drive arrangement on the rotor shift (4) of the electric motor or on a transmission output gear (5) within the flanged transmission. A protective encapsulation is achieved while the code wheel (1) is arranged on the rotor shaft (4) by a protective housing (3) supported on the code wheel (1). Alternatively, the code wheel is arranged on the transmission output gear (5), by a protective housing formed by transmission housing wall (201), the transmission output gear (5) itself. Sealing rings (8) arranged adjacent to the code wheel.

Abstract: A rotor for an electric motor, energized by a permanent magnet, has an essentially cylindrical rotor body (1), with shaft sections (7, 8) coaxially distant from the rotor body (1). Permanent magnets (21) are fastened to the outer periphery (16) of the rotor body (1). In order to counterbalance the rotor, balance weight rings (6), in which weights (26) are inserted and which are disposed on seat sections (5) formed on the rotor body (1), are mounted on the rotor body (1).

Abstract: A reluctance synchronous electric machine whose rotor is of the kind with a magnetically axial segmentation and includes magnetically axial layers of a ferromagnetic material alternated with intercalary layers of a non-ferromagnetic material. Some permanent magnets are inserted within the intercalary layers and they are oriented in such a way that they produce a magnetic flux oriented along the quadrature axis of the rotor in the sense opposite the magnetic flux produced along the same quadrature axis by the feed current flowing through the stator windings. Preferably the permanent magnets are proportioned in order to compensate at least by approximation the magnetic flux along the quadrature axis when the current flowing through the stator windings is the nominal current of the machine.

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 a rotary actuator including a voice coil motor having a coil fitted to the other end portion of a carriage fixed to a rotary shaft and having a load at one of the end portions thereof, the rotary actuator of the present invention is characterized in that the rotation on the coil side and the rotation on the load side with respect to the rotary shaft are balanced. The weight of the coil is adjusted by forming the coil by at least two kinds of coil wires having different specific gravities, and where a plurality of coils are disposed on the outer side of the rotary shaft, the weight of the coil on the load side is made smaller than that of the coil on the opposite side.

Abstract: A trochoidal speed reduction mechanism forms an integral part of the stator and rotor of an electric motor so that a slow-speed high-torque output is produced without having any high speed rotating component in the motor. A rotor has an epitrochoidal contour with a predetermined number of lobes. Positioned around the rotor are two non-rotating orbiting stator-rings, phased 180 degrees apart, each provided with a number of rollers equal to the number of lobes on the rotor plus one. The rollers are rotatably mounted on the inner surface of the stator-ring and are in continuous contact with the epitrochoidal contour of the shaft rotor. The non-rotating orbital movement of the stator-rings is produced by magnetic forces from a series of stator windings arranged as magnetic poles around the stator-rings. This action causes the rotor to rotate at a speed equal to the orbiting speed of the stator-rings divided by the built-in speed reduction ratio.

Abstract: A dynamoelectric machine includes a rotor assembly and a stator assembly mounted between endshields. The endshields have axial and radial apertures to assist in motor cooling. A motor shaft extends through one endshield. A mounting plate is provided for mounting the motor. The shaft extends vertically downward through the mounting plate, to which the transmission of a machine also is mounted. A drive pulley is attached to the motor shaft and a driven pulley is attached to the transmission shaft. The pulleys are maintained in planar alignment to permit transfer of power between the pulleys and to minimize belt wear. A second endshield has a bearing housing design which provides a flush endshield surface facing upwards towards the bottom of the machine. Motor height can be varied by increasing stator assembly stack height between the endshields to the extent permitted by the overall space available between the flush surface of the one endshield and the bottom of the machine.

Abstract: With respect to an armature for use in an electric motor of an engine starter, or the like, an annular steel-plate ring (11) is fitted on the outer circumference of commutator segments (2) through insulating paper (12) for the purpose of stably maintaining strength in the connection between each of the commutator segments (2) to which armature coils (6) are connected and a resinmolding member (3) fixed to an armature rotary shaft (5).

Abstract: A rotor for an electric motor energized by permanent magnet means comprises positioning devices for permanent magnets. These positioning devices consist of positioning rings disposed in the region of each end face of a rotor body and at least one inner positioning ring disposed on the rotor body between the two. The positioning rings comprise positioning webs which extend only over a small part of the length of the outer peripheral surface of the rotor body and which partially define compartments for in each case a permanent magnet. On the one hand, this ensures accurate and simple mounting of the permanent magnet while at the same time it reduces the moment of inertia of the rotor.

Abstract: A stator of a rotary electric machine is supported in a housing structure and is secured therein against relative rotation or axial movement by angularly spaced fasteners. A circumferential passage in the stator communicates with a supply passage for liquid coolant. The temperature coefficients of expansion of the materials of the housing and the stator differ so that below a predetermined temperature those parts are an interference fit, and above that temperature channels are created between the fasteners, through which channels coolant can flow axially from the passage.

Abstract: A spindle motor for rotating magneto-optical discs that are attracted and held on a fixed position at an end of a motor driven shaft by means of a clamping rotor with internal field magnets. The spindle motor has a set of stator coils and a set of field magnets held internally mounted on the shaft side of the clamping rotor. The field magnet and stator coil sets are arranged at a regular interval in a ring around the circumference of the clamping rotor and of a shield member of the spindle motor respectively, leaving a thin gap between the stator coils and the field magnets. The saucer-like clamping rotor is made of a non-magnetic material and applied at the disc side, on which side a magneto-optical disc is charged, of the rotary shaft. The field magnets, being fitted on the face of the clamping rotor opposed to the magneto-optical disc mounted face, function both as a means for driving the clamping rotor for motor operation, and as a disc-attracting device.

Abstract: A commutator 4 for a starter motor comprises a plurality of segments 4a electrically connected to armature coils 3, an insert member 4b fitted to an armature shaft 2, and a glass-fiber-reinforced phenol resin 4c molded to integrate the segments with the insert member, wherein mica particles in a range of 5%-10% by weight are uniformly contained in the resin.

Abstract: The end turn portions of the saddle-shaped coils of a superconducting field winding in the rotor of an electric machine are clamped in an axial direction by a wedge device positioned in an annular recess between its wall and the nearest end turn portion. The wedge device comprises two rings mounted coaxially with the recess and having their sides facing each other bevelled so that the distance therebetween increases toward the axis of the rings. These sides are provided with radial depressions. Bolts with heads tapering toward the threaded portions are positioned in the depressions. When the bolts are radially shifted the rings are forced apart thus pressing the end turn portions one to another and to the wall of the recess.

Abstract: A coaxial starter motor comprising a d.c. motor having a hollow rotary shaft extended forward and a planetary speed reduction gear having a sun gear disposed on the outer periphery of the rotary shaft. The starter motor comprises an over-runing clutch of which inner sleeve rotates in one direction and is provided at the inner circumference with helical splines, the over-runing clutch being disposed on the front side of the rotary shaft and rotated at a reduced speed by the planetary gear speed reduction gear. Also provided is an output sleeve mounted on the front end portion of the rotary shaft and having a pinion at its front end portion and axially movably and relatively rotatably supported by a bearing, in which helical splines formed close to the rear portion of the outer periphery is in mesh with helical splines of the inner sleeve. A solenoid switch is disposed on the rear end portion of the d. c.

Abstract: The invention provides an armature rotor for electromagnetic retarder, comprising at least one disc (2) extended axially on one of its faces by a plurality of fins (9), each fin being defined by two parallel or substantially parallel faces slanted with respect to the corresponding radii, the tips of the fins being connected together by an annular flange (11) and the assembly formed by the disc, the fins and the flange being made as a single moulded block from ferromagnetic material. The fins (9) of said rotor are particularly thin, numerous and so close together, the thickness of each fin being less than 5 mm and the width of the gap between two consecutive fins, in its narrowest zone, considered perpendicularly to the facing faces of the fins, being less than 10 mm.