Abstract: There is disclosed a flat motor of reduced length and maximized power output and which is suitable to being disposed in a limited space configuration and a close tolerance within other objects which may be present in such limited space.

Abstract: A control motor comprising an integrated direct current motor and speed control circuit, the speed control circuit controlling a rotational speed of the direct current motor by means of changing a voltage applied to an armature by a chopping of a switching element, the speed control circuit being composed upon a printed circuit board, the printed circuit board being supported in the direct current motor by a case member formed of a heat-conducting material, and a radiation portion of the switching element which is closely contracted with a projection formed integrally with the case member and is installed in the projection.

Abstract: A non-brush D.C. motor with a new improved stator comprises a stator abse whose two side discs have notches and feet so that the polar plates can engage with. By expanding the thinner lips of metal cylinder, the upper and lower polar plates can be fixed firmly with stator base. The central shaft post of housing base can pass through the inner perimeter of metal cylinder.

Abstract: A rotary electric machine comprising a stator and a rotor arranged opposedly of the stator. A magnet is provided on the stator or a frame for holding the stator at a position so as to be constantly opposed during rotation to a portion of the magnetic body of the rotor. The magnet is disposed at a position other than at a portion at which the magnetic action for rotation of the rotor occurs. The rotor is therefore constantly biased so that rotor play is minimized and non-repeatable deflections of the spindle are eliminated.

Abstract: A brushless motor comprising: a rotor constituted by a permanent magnet having a plurality of circumferentially alternately equally magnetized N and S magnetic poles; a stator having a plurality of excitation coils equidistantly disposed around the rotor; a rotor position detecting member such as a magneto-sensitive element; and a printed circuit board having a commutation circuit for switching the electric current for the excitation coils based on a detection signal of the rotor position detecting member; wherein the number of the magnetic poles of the rotor is selected so that the number of the magnetic poles of the rotor located within an area between respective center lines of two adjacent excitation coils is an odd number not smaller than three. The width of each excitation coil is selected so that an angle .alpha. formed between lines connecting the circumferential opposite ends of each excitation coil commonly to a center of the rotor is made equal to an angle .beta.

Abstract: The axial end portions of the insulating members which are used to line the longitudinal channels formed between circumferentially adjacent, radially inwardly projecting poles in a stator (e.g., an electric motor stator) are protected from damage by the wire being wound by providing terminal boards at each axial end of the stator having portions which overhang the axial ends of the insulating members. Temporary wire grippers may also or alternatively be mounted on the axial ends of the stator (e.g., on the above-mentioned terminal boards) for temporarily holding the leads of the stator coils prior to permanent termination of those leads on permanent terminals on the terminal boards.

Abstract: An improved brushless motor apparatus has a first housing section which defines a generally cylindrical chamber enclosed by first and second end walls. A first rotor section is rotatively mounted in the chamber. The chamber has a plurality of formed stators winding in line communication with a first coupler. The rotor having a second rotor section extending beyond said second end wall to which a actuation disk is detachably mounted. The actuator disk has magnetized on one face a commutator ring and a encoder ring. A driver board is detachably mounted to the second end wall and has fixably mounted thereto a second coupler mating with the first coupler. A plurality of commutator sensors are aligned opposite to the commutator ring and a plurality of encoder sensors are aligned opposite the encoder ring. The driver board has mounted to its second face a third coupler and a driver circuit in electronic communication with the commutator and encoder sensors, and the second coupler and the third coupler.

Abstract: A frequency generator includes a circuit board having one surface on which a generating coil pattern and a wiring pattern are printed in stacked relationship via an insulating layer. In a preferred embodiment, the coil is pointed over the wiring pattern.

Abstract: An armature coil has sets of unit coil groups, each comprising an even number of unit coils, which are printed and arranged on a belt-like, thin and pliable insulating material to form a printed coil. The printed coil is wound and fixed into a cylindrical shape, the armature coil being featured in that the gap between adjacent conductors of the unit coil groups located on the outer periphery side of the cylindrical shape is set larger than the gap between adjacent conductors of the unit coil groups located on the inner periphery side thereof such that the conductors of respective unit coils are axially arranged to take the same angle in the circumferential direction.

Abstract: A stator having a stator yoke, a first and second printed substrates, a plurality of drive coils and hall elements mounted on the first substrate, and a group of drive circuits mounted on the second substrate, wherein an end of the drive coil which is to be connected to the group of the drive circuits is directly connected to the second printed substrate.

Abstract: A rotary device is disclosed for use as a precision element such as an optical scanner. The device comprises a rotor which includes a driven element such as a polygon having a plurality of mirror surfaces thereon, an arrangement for supporting the rotor for rotational movement, and a drive motor for the rotor. The rotor supporting arrangement includes a thrust bearing. In order to provide a rotary device having a low profile and a minimum of parts, a planar motor is used as the drive motor, and the permanent magnet of the motor is incorporated in the rotor. The thrust bearing includes an arrangement for directing an axial force against a radial surface of the rotor when the motor is actuated.

Abstract: A brushless motor of the invention has a plurality of stator members in which arc-shaped magnetic pole portions are arranged around a periphery of a magnet rotor. One of the stator members is constructed such that a plurality of magnetic pole portions are continuously formed. For the number of parts, the number of stator members is smaller than the number of magnetic pole portions.

Abstract: A rotor for printed-wiring motors includes a flat disk-like non-iron armature mounted on a hub secured to a rotating shaft, the armature being composed of at least two sheet coil assemblies bonded together under heat and pressure with a first thin insulating disc disposed therebetween. Each of the sheet coil assemblies is composed of a pair of sheet coils bonded together under heat and pressure with a second thin insulating disc disposed therebetween. Both the first and second insulating disc are formed of a web of aramid fiber coated with an insulating bonded adhesive.

Abstract: An apparatus for transmitting electric power and information signals between a rotating element provided at a rotating shaft and a fixed element provided at the circumference of the rotating shaft. Both the rotating element and fixed element are configured as coils, and they perform transmission by an electromagnetic induction. Each coil is formed in a cylindrical form, and has a split structure comprising plural blocks which can be mounted on the shaft from the circumference of the rotating shaft. The rotating element and fixed element are mounted respectively on a rotating shaft of a machine and a fixed side of the machine, and electric power and information signals needed by the rotating element are transmitted from the fixed element.

Abstract: A stator for a ceiling fan includes a disc with two different depth slots alternately formed on the outer peripheral edge. A primary winding and a secondary winding are respectively wound in the longer slots and the shorter slots. An axle is disposed through the center of the disc and a circuit board including one or more resistors is disposed on a surface of the disc. Two or more contacts are provided for connection to a switch for changing the power supplied to the windings through the contacts in order to change the rotational speed of the ceiling fan. A cavity is formed on the circuit board for receiving the resistors.

Abstract: A permanent magnet rotary dynamo electric machine such as a high speed three phase brushless motor has at least one stator and at least one rotor spaced apart from one another by a cylindrical gap therebetween. A plurality of permanent magnetic poles are provided by a plurality of rare earth magnets positioned side by side on the inside of a cup shaped rotor and oriented parallel to the rotor axis. The stator has a plurality of wound poles of shallow depth which are wound on or close to the surface of a substrate of low magnetic permeability (less than 20 times that of air). The wound poles are positioned adjacent the cylindrical gap so as to intersect the magnetic flux paths between adjacent permanent magnetic poles.

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: There is provided a motor having a frequency generator comprising a frequency generating base plate on which a frequency generating coil pattern and a land are formed, in which a signal of the frequency proportional to the rotational speed of a rotary driving apparatus which is generated from the frequency generating coil pattern is output from the land to another base plate. The land is formed in the frequency generating coil pattern.

Abstract: An electrically commutated, collectorless direct-current motor is disclosed whose stator has a self-supporting drum winding and a cylindrical plastic body which is located concentrically with the drum winding in a winding head. The cylindrical plastic body has recesses which contain eyehooks. The ends of the drum winding are connected with the eyehooks, which are welded to a circuit board. The invention makes it possible to automate the connection of the winding ends to the circuit board.

Abstract: A 1-phase energized disk-type brushless motor or fan motor comprises a single position detecting element located at a position on a printed circuit board corresponding to one of magnetically active conductor portions of one of stator coils of the stator armature. The magnetically active conductor portions include a width substantially equal to the width of each pole of the magnet rotor. A cogging generating magnetic member or plate having a width substantially equal to the pole width is located on the printed circuit board such that it is spaced by about three fourths of the pole width from one of the conductor portions of one of the stator coils so that the magnet rotor may stop with one pole thereof just opposed to the magnetic member, thereby assuring self-starting of the motor and uniform turning torque over the entire rotation of the motor.

Abstract: A wireless slip ring assembly includes inner and outer subassemblies mounted together for undergoing rotation relative to one another. The inner subassembly includes a sleeve composed of axially spaced annular slip rings and a printed circuitboard mounted within the sleeve having spaced longitudinal sides connected at longitudinal edges and spaced conductive paths defined on the longitudinal sides and extending to the edges. The conductive paths are spaced from interior sides of the slip rings except at the longitudinal edges of the circuitboard, where each conductive path is electrically and rigidly connected to one slip ring.

Abstract: In order to assure in a simple manner and with the smallest axial mounting space, a low-noise bearing support having little radial unbalance, two axial ball bearings (2, 3) are provided with a firm fit relative to the rotor shaft (1) and mutually braced axially by an interposed spring washer. Advantageously, ball bearing (3) next to the open end face of the bearing hole is designed as a stationary bearing with a press lift between its inner ring (31) and the rotor shaft (1) as well as between its outer ring (32) and the bearing hole.

Abstract: A miniature motor having a metallic case with a printed circuit board installed therein. The printed circuit board has an electronic circuit, mounted thereon, for controlling the miniature motor. A lug portion is provided protruding from the edge of an open end of the metallic case. An engaging portion is provided for engaging the lug portion with an earth terminal of the printed circuit board. The earth terminal and the lug portion are electrically joined by means of soldering in a state the printed circuit board is fitted to the metallic case in such a manner as to engage the lug portion with the engaging portion.

Abstract: In construction of a peripheral-magnetization type magnetic encoder having a rotary spindle and a magnetic head, a resin housing is formed by insert moulding so as to embrace the spindle leaving a slight tubular clearance to allow free axial rotation of the spindle, thereby providing direct, simple and stable support to the rotary spindle for enhanced precision in direction.

Abstract: A brush holder assembly for an electric motor and a method of making it. The assembly comprises a unitary structure formed of a molded plastic housing in which a stamped and formed metal circuit plate is encapsulated. Separate circuit strips are formed by punching circuit bridges out of the plate after it is encapsulated. The separate circuit strips are embedded in one face of a web spanning the housing. On the opposite face of the web, brush holder channels are molded. The separate circuit strips each have a terminal formed unitarily with them, the terminals being embedded in a socket extending radially, outward from the web through a skirt encircling the web.

Abstract: The rotary actuator comprises sector-shaped magnets, with a coil located therebetween. A flexible printed cable is fixed on one surface of the coil, and opposes the magnets. The flexible printed cable extends inside the coil. The innermost end of a conductive wire constituting the coil is connected to the flexible printed cable inside the coil, without being guided between the coil and the magnets. Power is supplied to the coil through a cable located between the coil and the magnets. The coil generates a magnetic flux in response to the input current. A force acts on the coil by way of an interaction between the magnetic flux from the coil and the magnetic flux from the magnets. For this reason, the coil rotates about a rotating shaft of a head-support mechanism mounted on the coil. The head is then moved and positioned at a target track.

Abstract: The method of forming a compact resolver/encoder assembly which is impervious to moisture, comprises several steps. First a number of electronic components of the resolver/encoder are mounted on a flexible printed circuit board. The circuit board is then folded into a generally cylindrical envelope and placed in a generally cylindrical container having a closed bottom end and an upper open end. The folded circuit board tens to unfold against the inner surface of the cylindrical wall of said container. Then a form made of stiff but flexible paperboard is inserted within the cylindrical envelope and tends to unfold to take on a tear drop cross section. Next a heat insulating potting compound is inserted into the generally annular space in the container between the form and the cylindrical wall of the container where the folded, printed circuit board is located.

Abstract: In order to be able to decrease the axial height, while simultaneously simplifying the manufacture, and also increasing the operational safety of printed circuit boards with electrical structural elements, such as Hall transducers affixed and electrically contacted to it further:(a) the printed circuit board contains, at least on one side, a supporting board (2) with recesses (21-23) in the area of each Hall transducer (4; 5; 6) and its connection legs (41-43; 51-53; 61-63) and on the other side a conductive foil (3) fastened to the surface of the supporting board (2), which covers the recesses (21-23) at least in the area of the free ends of the connection legs (41-43; 51-53; 61-63) and lands (44-46; 54-56; 64-66) for the connection legs of the Hall transducers; and(b) each Hall transducer and its connection legs is placed in a recess and the connection legs extend within the recess and include angle-bent ends connected to the lands.

Abstract: A motor comprises a rotor made of a permanent magnet and pairs of yokes having pairs of magnetic pole parts arranged round the circumference of the rotor. The rotor is arranged to be pivotally carried by a bearing part disposed at one end of the yoke. A position detecting element which detects the magnetic pole position of the rotor is carried by the yoke. An exciting coil is wound round each pair of the yokes.

Abstract: A flat brushless motor having magnetoresistive elements includes a flat multipole permanent magnet mounted on a rotary shaft, a yoke member positioned in such a manner as to face the permanent magnet, and coils. The brushless motor also incorporates a plurality of zig-zag patterns of magnetoresistive elements which are formed on a plane perpendicular to the axis of the rotary shaft.

Abstract: A circuit board containing control mechanisms for operation of an electric fan motor is fixedly assembled exteriorly to an end flange of the motor in only one position so that electrical contacts on the board extend through apertures in the end flange to cooperate with contacts on the motor side of the end flange to provide a completed motor. Assembly of the circuit board can be done without disassembly of the fan or motor, so that testing prior to insertion is possible.

Abstract: A bearing structure, preferably for supporting a rotary table (4) in metrological apparatus, includes both a journal bearing (34,36,38) and a thrust bearing (56,66). The journal bearing is made up of three dry pads (34,36,38), one (38) of which is radially adjustable, and the thrust bearing (56,66) comprises first and second air bearings. The axis of rotation of the bearing is vertical, and the lower (66) of the air bearings is less stiff than the upper one (56).

Abstract: An electronic control and regulation device for a machine or like apparatus has a plurality of printed circuit boards in a housing, each of the printed circuit boards having interconnected analog and digital circuitry with respective analog and digital terminals. The analog and digital terminals of all of the boards are interconnected respectively by analog and digital conductor bundles, the analog conductor bundle running to the machine or apparatus to be controlled, and serving as well to supply the electric current to the analog part of each printed circuit board.

Abstract: A strip of electrically insulating foil (15) is subdivided into successive foil parts (23) separated by folding lines (21) and folded against each other along the folding lines. Each foil part has on one of its major surfaces a conductor track (25) which forms a curved meander-like line extending in a number of pole-forming curves (33) connected by connection members (31). The conductor tracks (25) on the foil parts (23) are connected together by connection tracks (27). The curves (33) cooperate with the connection tracks (27) and the connection members (31) to form coils arranged in a circle. The winding is particularly suitable as a stator winding for a flat direct current motor.

Abstract: A wheel mounted hub containing an electrical generator which is pivotally supported in arms of a yoke. The yoke and generator have an offset center of gravity, tending to give the yoke and generator a pendulum-like behavior within the housing. During wheel rotation, the generator tends to remain along a gravitational line of force, forcing a small wheel associated with the generator to turn against the hub. Around the outer periphery of the yoke, yet within the hub housing, is a circuit board which carries a power utilization circuit, so that the electrical path between the generator and the utilization circuit is very short. The circuit board may carry auxiliary circuits such as a current limiter, a generator disengaging circuit, a daylight deactivating circuit and a circuit for allowing operation regardless of direction of rotation.

Abstract: Linear motor having a plurality of individually energizable coils along an axis. An armature member moves along the axis, and the coils are selectively energized to position the armature member along the axis. The motor is constructed in modular form and can be extended to any desired length by adding coil units and switching elements.

Abstract: A 1-phase energized disk-type brushless motor or fan motor comprises a single position detecting element located at a position on a printed circuit board corresponding to one of magnetically active conductor portions of one of stator coils of the stator armature. The magnetically active conductor portions include a width substantially equal to the width of each pole of the magnet rotor. A cogging generating magnetic member or plate having a width substantially equal to the pole width is located on the printed circuit board such that it is spaced by about three fourths of the pole width from one of the conductor portions of one of the stator coils so that the magnet rotor may stop with one pole thereof just opposed to the magnetic member, thereby assuring self-starting of the motor and uniform turning torque over the entire rotation of the motor.

Abstract: A hybrid integrated circuit substrate for a motor is formed by an iron substrate (1), a resin layer (2) adhered on the same and a copper foil layer (3) adhered on the same. The resin layer (2) is formed of epoxy resin, and Kevlar fiber belonging to aromatic polyamide fiber is mixed therein in the form of cloth or paper. Thus, a clad formed by the resin layer (2) and the copper foil layer (3) has a thermal expansion coefficient close to that of the iron substrate (1), thereby to prevent warping caused in manufacturing of the hybrid integrated circuit substrate. The copper foil layer (3) is etched in prescribed configurations to form conductive paths (13), to which stator coils (5) and various circuit elements (14, 15) are connected.

Abstract: The compact digital resolver/encoder assembly comprises a resolver and a flexible printed circuit board having a number of electronic components for decoding the resolver mounted on the flexible printed circuit board. A generally cylindrical container is provided having a cylindrical wall, a closed end and an open end. The circuit board is folded into a generally cylindrical shape and received in the container separate from the resolver. The circuit board is insulated from the container by an electrical insulating potting compound situated in the container and surrounding the circuit board. The resolver is received in the container and is spaced a predetermined distance from the encapsulated circuit board. Preferably a voltage regulator is mounted to an inside wall of the container and electrically coupled to the circuit board.

Abstract: A collectorless direct-current motor with a stator mounted on a motor flange and a rotor mounted so that it can rotate on a shaft, in which case power semiconductors for the purpose of commutating the currents of the stator are attached to parts of the motor for the purpose of dissipating the heat and a circuit board with electronic components is provided for the purpose of controlling the commutation, and the power semiconductors are electrically connected to the circuit board, in which case the power semiconductors (39) are attached to the motor flange (2), preferably the outside (29) thereof, in heat conducting contact.

Abstract: A permanent magnet-excited rotor motor is disclosed wherein, a circuit board (6) mounted on a radial motor attachment flange (22) is arranged. The front and rear sides of the circuit board (6) are equipped with conductor strips. On the front side, Hall transducers (15) influenced by rotor magnets (81) in a speed dependent manner are mounted. A flat cable brought in from the outside is divided into a first cable portion (12), passed through from the front with supply and signal voltage lines for the Hall transducers (15), and into a second cable portion (13) passed through from the back to the front with winding feed lines for the stator coil winding ends (14), which are likewise passed through from the back to the front of the circuit board (6) and thus can be soldered to the freely accessible front side.

Abstract: In a brushless motor, a rotor magnet is rotatably supported and comprises a main magnetizing member for rotation driving with N-poles and S-poles alternately arranged, and a subsidiary magnetizing member for detecting the rotatonal speed with N-poles and S-poles alternately arranged at smaller pitch than that of the main magnetizing member. A stationary plate is provided with stator coils opposed to the main magnetizing member for rotation driving and a detecting substrate having a pattern in opposition to the subsidiary magnetizing member. A pair of leads connected to the pattern of the detecting substrate are arranged at the same angle as the angular interval of two consecutive magnetic poles with the same polarity in the main magnetizing member for rotation driving or at an angle corresponding to an integer multiple of the angular interval. This results in phase cancellation of distorting signals from the driving poles.

Abstract: A small motor having a planar air gap has a rotor comprising a rotor shaft journalled in a carrier pipe of small diameter at whose outer periphery are mounted shape-retaining rotor coils which are cantilevered out into the air gap. This provides a rotor of very small axial moment of inertia, affording very short start-up times. The printed circuit collector has lamella-group connectors on both sides of the substrate. Such a motor is suitable especially for signal-recording or -reproducing apparatus. The arrangement of the rotor coils is symmetrical and yields a very simple and compact motor construction.

Abstract: A physically programmable electrical connector 70 has a first plurality of interconnected conductive paths 71-78. A second plurality of conductors 103-110 and a third plurality of leads 71'-78' are connected to the conductive paths. Electrical discontinuities 87-97 are selectively established in some of the conductive paths, such that the conductors become electrically connected to the leads in a predetermined pattern. A single connector design may be used for connecting varying numbers of conductors and leads.

Abstract: The winding of the motor comprises coils which may be formed by conductive paths deposited on the surface of an insulating substrate according to the printed circuit technique. Each turn of the coil comprises two active conductors extending radially, inside connections, and outside connections. The outside connections of the outer paths of the coil have a fret or meander shape, constituting three pairs of auxiliary conductor portions. Upon rotation of the rotor, these portions create in the winding induced voltages having a frequency three times the commutation frequency of the coils, the effect of which is to regularize the motor torque.

Abstract: A motor-driven power steering unit which can easily be added to an automobile. The motor-driven power steering unit includes a case fixed to the automobile body. A first shaft rotatably is supported in the case and has one end connected to a first lever for being operatively coupled to the steering wheel. A second shaft is rotatably supported in the case coaxially with the first shaft and has one end connected to a second lever for being coupled to the tie rods. A torsion bar is interposed between the first and second shafts and interconnects the first and second shafts. The power steering unit also includes a torque detecting mechanism interposed between the first and second shafts for detecting the steering torque applied from the steering wheel to the first shaft to generate a signal indicative of the detected torque. A motor is disposed in the casing for applying an assistive torque to the second shaft a power supply energizes the motor.

Abstract: A brushless DC micromotor made up of a stator coil and a rotor housed inside thereof with magnet poles formed therein, which micromotor is characterized in that the stator coil is formed by coaxially winding more than one coil sheet formed on an insulating sheet, on which coil sheet a plurality of coil patterns are continuously provided in series in the direction of winding. The motor of the present invention can be made smaller, thinner and lighter than the conventional counterpart made by the use of a wound copper wire coil.

Abstract: The motor comprises a flexible circuit composed of a substrate disposed in an air gap between the stator and the rotor, bearing a coating of copper etched to produce the various circuit components. Conductive paths carry the current to brushes soldered on zones of the circuit. Another path leads to further zones constituting shorted turns interconnected by striated areas constituting resistor elements.

Abstract: A printed coil unit for use in a very thin type flat brushless motor or a linear actuator, in which a magnetic sensor element having a thickness smaller than 0.6 mm is embedded integrally within the coil unit without projecting therefrom in a region located outside and in the vicinity of spiral conductor coil patterns. The printed coil unit includes a single printed coil sheet or a lamination of such coil sheets each having more than one spiral conductor patterns on the same plane. A magnetic sensor element, such as Hall element or magneto-resistance element having a thickness equal to or smaller than that of the printed coil sheet is embedded within the coil sheet at blank regions located between adjacent spiral conductor patterns, or regions made availably by diminishing the size of a selected one of the spiral conductor patterns. A moving speed detecting coil or patterned conductor can be additionally provided on the other available area of the coil sheet.

Abstract: A dynamoelectric machine having a large magnetic gap and flexible printed circuit phase windings includes a multi-pole samarium cobalt magnet assembly consisting of radially aligned magnets and circumferentially positioned interpole magnets attached to a soft iron ring for providing radially directed magnetic poles of alternating polarity, and a printed circuit winding assembly attached to a soft back iron sleeve for providing electromagnetic poles. The printed circuit winding assembly comprises a lamination of selectively aligned and interconnected printed circuit phase windings, each having serially connected printed circuit coils of the same phase. The winding and magnet assemblies are separated by a small mechanical gap to allow their relative rotation.