Abstract: A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for negating the armature windings' flux passing between adjoining poles. Each magnet 6 is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion 7 is provided between the pole and the interpole of the rotor 3. Owing to the provision of the magnetic portion 7, when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor 3. Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.

Abstract: The invention concerns a rotating electric machine comprising a stator equipped with armature coils and a rotor mounted rotating inside the stator. The rotor having a rotor part with permanent magnet(s) and a rotor part with magnetic resistance. The rotor is substantially uniform over its axial surface and ahs along its tangential direction a distribution of polar parts with permanent magnet(s) each defining two poles of polarities imposed by magnet(s), ad polar parts with magnetic resistance each defining two poles with free polarities. The invention is applicable to motor vehicle alternators or AC starters.

Abstract: In a switched reluctance motor and control system for such a motor, a rotor comprises four salient poles each having a width of about 50-degrees, and a stator has six salient poles each having a width of about 30-degrees. One Excitation winding is mounted around each stator salient pole and these are connected in series. An excitation drive circuit supplies a dc excitation current to each excitation winding to excite the motor in accordance with an excitation command signal. A torque-current drive circuit renders a current, whose magnitude in accordance with a torque command, to flow into torque windings mounted one round on each of the six stator salient poles successively according to the angle of rotation of the rotor.

Abstract: The invention relates to a single-phase autonomous machine, which comprises: A P-pole pairs rotor, a P-pole pairs stator which comprises two windings, an excitation winding and a single-phase power winding; and an external source for providing current to the said excitation winding, for, creating a magnetic field that interacts with a time-varying inductance caused by the rotor rotation.

Abstract: A flux concerning electrical machine has a stator and a rotor, the stator including on its face a series of notches housing a series of stator coils, and further including a series of housings for excitation means, and the rotor including a plurality of flux commutator teeth for selectively making pairs of closed magnetic circuits through the stator coils. In accordance with invention the stator includes a plurality of independent stator coils defining as many phases and located in a series of individual cells angularly distributed on its circumference and the rotor teeth are equi-angularly spaced so that the angular positions of the various pairs of teeth have predetermined phases relative to the various individual cells. The invention is applicable in particular to brushless alternators for motor vehicles.

Abstract: An enclosure formed of a non-magnetic material occupies space in the non-magnetic gap between the rotor and stator. As the enclosure thickness increases, the size of the air gap, which is the non-magnetic gap minus the enclosure thickness, becomes smaller, and the resistance to the axial flow of gas coolant decreases. A non-circular shaped enclosure provides additional area between the rotor and stator for axial transfer of gas and minimizes the non-magnetic gap at the d-axis while maximizing the air gap at the q-axis. The shape of the enclosure also reduces the centrifugal force in the vicinity of the q-axis and delivers a more circular shape as a result of the deformation at operating speed.

Abstract: A flux barrier type synchronous reluctance motor in which a plurality of flux barriers are provided in a rotor, of which a plurality of ribs form the end portion of each of the flux barriers, wherein assuming that both ends of a single flux barrier are a first and a second rib, when the first rib faces the center of a slot of a stator, the second rib faces the center of a teeth of the stator.

Abstract: In a q phase-reluctance type motor including a rotor having 2n rotor protrusions with an arc angle X°, a stator having 2m stator protrusions with an arc angle Y° and m pairs of exciting coils, each of the pairs of exciting coils is disposed around one of the stator protrusions spaced apart at 180° in mechanical angle, and the following conditions are met: q≧5, X°, Y°>360°/(n×q), X°+Y°=180°/n−&agr;°, where &agr;° is a counter torque marginal angle which is larger than 0°.

Abstract: A generator of the present invention is formed of ring permanent magnet trains 2 and 2′ attached and fixed onto two orbits 1 and 1′ about a rotational axis 3, magnetic induction primary cores 4 and 4′ attached and fixed above outer peripheral surfaces of the ring permanent magnet trains 2 and 2′ at a predetermined distance from the outer peripheral surfaces, magnetic induction secondary cores 5 and 5′ attached and fixed onto the magnetic induction primary cores 4 and 4′ and each having two coupling, holes 6 and 6′ formed therein, tertiary cores 8 and 8′ inserted for coupling respectively into two coupling holes 6 and 6′ of each of the associated magnetic induction secondary cores 5 and 5′ opposite to each other, and responsive coils 7 and 7′.

Abstract: A self-starting brushless electric motor having a first motor part (stator) (11) with poles arranged in a row, the poles constituting ferromagnetic poles (13S) or permanent-magnet poles (14A), a second motor part (rotor) (12) with poles arranged in a row, the poles having ferromagnetic poles (16A) or permanent-magnet poles and being arranged opposite the row of poles on the first motor part (11), wherein the motor part with salient ferromagnetic poles or, if both motor parts have salient ferromagnetic poles, at least one of the motor parts has a permanent-magnet pole, and also a magnetizing winding on the first motor part. The system of poles formed by the pole rows is magnetically asymmetrical in the direction in which the motor parts (11, 12) are movable in relation to each other.

Abstract: An electric motor having a pancake construction stator and rotor poles that are formed by photolithography. The stator and rotor can be formed from an amorphous material, thereby reducing grain boundaries and allowing smaller poles to be etched. The number of poles, never less than three, can be from 20 to 5000 times the stator diameter in centimeters. The extremely thin rotor comprises a flexible disk spaced from the stator by an air cushion maintained in accordance with forces as dictated by Bernoulli's principle. This insures that the spacing between the rotor and stator is automatically adjusted to minimize the distance between the rotor and stator poles and thereby to maximize flux linkage between the poles. By operating the motor in a range that avoids saturation of the poles, a variable torque motor is provided since increased current through the motor windings allows the magnetic field intensity and thus the flux linkage to increase.

Abstract: A reluctance motor electric machine including a number of stator pole teeth and a number of rotor pole teeth selected so that with a minimal reluctance, due to the rotational alignment of the rotor in relation to the stator, three air gaps that can be flowed through are produced between three pairs of stator pole teeth and rotor pole teeth. This results in the fact that now three regions of the yoke body are elastically pulled in the direction of the rotor rotational axis and consequently, the elastically deformed zones of the yoke body only extend over essentially and therefore act in a more rigid fashion. This results in the advantage that with the same excitation frequency, the deformations take place with small amplitudes and therefore with less generation of noise.

Abstract: A motor with small ripple and capable of high-speed rotation includes six stator poles having widths of about 60 degrees, which is less than 60 degrees when converted to rotor rotational angle. Excitation windings (HA3, HA4, and so forth) wound around the stator poles are connected in series with adjacent excitation winding connected in reverse series. Torque windings (HA1, HA2, and so forth) wound around the stator poles have three phases, where each phase winding comprises a pair on opposite sides with respect to the center of rotor rotation, separated from each other by 180 degrees, and connected in reverse series. In addition, two rotor poles (3) having widths from 60 degrees to 120 degrees when converted to the rotor rotational angle are provided.

Abstract: A rotor to be used in combination with a wheel speed sensor forming part of an anti-lock brake system. The rotor comprises an annular axial central section formed of a magnetic material. First and second annular axial end sections are coaxial and integral with the central section. The first and second annular axial end sections are formed of the magnetic material and arranged such that the annular axial central section is located between the first and second annular axial end sections. A plurality of holes are formed in the annular axial central section. The holes are arranged at equal intervals in the peripheral direction of the annular axial central section. A plurality of first and second depressions are respectively formed in the first and second axial end sections. A pair of the first and each second depressions are respectively located opposite to each other and connected with each hole.

Abstract: An electrical machine comprises a four-pole stator 2 provided with a field winding 10 and an armature winding 11, each of the windings 10, 11 being split into two coils 22, 23 or 24, 25 closely coupled and wound so that diametrically opposite portions of both coils are disposed within diametrically opposite stator slots. A two-pole rotor (not shown) without windings is rotatable within the stator 2, and a circuit is provided for energising the armature coils 24 and 25 when direct current is supplied to terminals 26 and 27 of the circuit. Switches 28 and 29 in series with the coils 24 and 25 are switched alternately to effect alternate energisation of the coils 24 and 25 so as to generate, as a result of the opposite winding of the coils, magnetomotive forces in opposite directions.

Abstract: A frame conveyed across the network is divided into a plurality of segments with an identical number of bits. All of the bits of a segment are received simultaneously, with each segment of the frame being received sequentially. Very often, the number of bits in the entire frame, will not be an integer multiple of the number of bits in the segment. Therefore the bits of the frame can be unevenly divided into the plurality of segments. The present invention detects the number of bits from the frame that are present in each of the segments, or at least the number of bits of the frame present in the last segment. An FCS function is used to create a segment FCS function which operates on all the bits of a segment at one time. The original FCS function is preferably an 8 bit function, which combines a present 8 bit word with the FCS calculated for previous 8 bit word in order to generate a new FCS for the present 8 bit word and all previous 8 bit words.

Abstract: In a VR-type resolver which is used in combination with a motor to detect the rotation position of the motor, the teeth number of a rotor of the resolver is reduced over the teeth number of a rotor of the motor. Also, the shape of the teeth of the resolver rotor is simplified into a curved shape such as a sine wave shape. Further, in another type of VR-type resolver, the number of the magnetic poles of the stator with respect to the number of the teeth of the rotor is set as a number being capable of satisfying not only the condition that it is a multiple of the phase number N and an even number but also the condition that it is a number which can be calculated according to one of the following expressions (1) and (2), that is,stator pole number=rotor teeth number/(M+1/N) (1)stator pole number=rotor teeth number/{M+(N-1)/N} (2),where M is an integral number of one of 1, 2, and 3.

Abstract: A ram air turbine includes a reaction turbine and an electrical generator that is driven by shaft power of the reaction turbine. A scoop directs a flow of ram air to an inlet of the reaction turbine and creates a pressure head for the reaction turbine. The reaction turbine and the scoop are contained entirely within a pod. The ram air turbine further includes a turbocompressor, including a turbine stage and a compressor stage, which provides a stream of cooled air to equipment inside the pod. The turbocompressor also reacts loads shed by the electrical generator.

Abstract: A filter system, in particular for filtering the lubricant of an internal combustion engine, having at least two filter elements (19, 25) which can be connected successively to the oil circuit and a changeover valve (21) which feeds the oil to be cleaned to one of the filter elements, with the valve (21) being operated by the pressure difference between the clean oil side and the raw oil side of a filter element (19, 25, 26).

Abstract: A reluctance motor is provided that reduces leaking magnetic flux. To generate magnetic flux between adjacent magnetic poles in a rotor 2, permanent magnets 4 are disposed in approximate centers of split magnetic paths near a borderline area between two magnetic poles in an internal portion of the rotor. Further, each of slots 8 in a stator 1 is wound with a coil of a corresponding phase such that the vector phase and amplitude expressed by the products of the number of coil turns and the amount of passing current, namely, ampere-turns, become almost identical for each of the slots. By reducing leaking magnetic flux according to this arrangement, generated torque can be increased. As the rotor mechanical strength is enhanced, the rotor can be safely driven at a higher speed. A practical motor is obtained that simultaneously achieves improved motor characteristics and reduced torque ripples.

Abstract: An inductor-alternator provides highly efficient conversion between mechanical and electrical energy. The inductor-alternator produces increased output by providing armature coils in a single air gap formed between two halves of a toothed rotor. In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within the rotating rotor. Airgap armature coils are mounted with the field coils to form a stationary assembly that is placed within the single air gap in the rotor so that the changing flux density (due to the rotating teeth) induces an output voltage in the armature coils. The rotor and stationary assembly are mounted in a housing by bolts that may also be used as terminals for the armature coils to reduce assembly complexity and production cost. The combined assembly provides high energy and power density because tip speed of the rotor is maximized and the use of air gaps is minimized.

Abstract: A switched reluctance motor comprised of a stator having a plurality of evenly spaced, radially oriented, like stator poles that define a gap between adjacent stator poles. Windings for three phases are wound about the stator poles wherein a stator pole of a first phase is disposed circumferentially between a winding and an associated stator pole of a second phase and a winding and an associated stator pole of a third phase. A rotor is mounted for rotation relative to the stator. The rotor has an even number of rotor poles, the rotor poles being dimensioned such that when one of the phases is energized, the rotor poles operatively interact with the energized stator poles such that the motor moves from a first state wherein half of the rotor poles are magnetically coupled to a like number of the stator poles to a second state wherein all of said rotor poles are magnetically coupled to a like number of stator poles.

Abstract: A brushless D.C. motor assembly includes a balancing sheet made of material with magnetic conductivity, the balancing sheet having an axle hole joined together with a stator by an axle tube, a rotor rotatably received in the axle tube, the rotation thereof controlled by a controlling device, and the rotor having a annular permanent magnet with a diameter substantially the same as the diameter of the balancing sheet wherein the permanent magnet and the balancing sheet attract each other.

Abstract: Featured is a hybrid permanent magnet/homopolar power producing device and methods related thereto. The device includes first and second portions, the portions being arranged to have a common long axis and so one portion is moving with respect to the other portion. The first portion includes a stator, and a modulating field winding that generates a magnetic field responsive to a DC current therethrough. The second portion includes a support member having a mounting surface, a plurality of permanent magnets and steel poles affixed to the mounting surface, and being arranged thereon so as to form an alteration of steel and permanent magnet poles.

Abstract: A switched reluctance machine has a stator or rotor lamination with pole arcs that are wider than necessary to fulfill the starting requirement of producing torque in the required direction at every rotor angle. On this lamination, preferably the rotor lamination, the surface is continuously graded over the entire pole pitch so that the first derivative of air gap length with angle is continuous. This allows control of the harmonics in the torque/angle curve and enables the production of smooth torque as the rotor rotates.

Abstract: Losses in efficiency of operation of a dynamoelectric machine as a result of eddy current losses and poor coolant efficiency and/or disruption of the magnetic circuit in a rotor by coolant passages is avoided in a dynamoelectric machine including a stator (18) in which a rotor (16) is journaled. The rotor includes a stack (16) of thin laminations (17) made of a ferromagnetic material to define a rotor body. The rotor body includes a plurality of equally angularly spaced poles (58) separated by recesses (64). Coolant passages (76) located in the rotor at or just radially inward of the base (72) of each pole (58) and substantially radially outward of the rotational axis (56) of the rotor (14) to maximize cooling efficiency of the poles (58) without disrupting the magnetic circuit in the rotor. Slots (80) are placed in the tips (70) of the poles (58) of selected laminations (17) and extend generally radially inward to reduce eddy current losses.

Abstract: A reluctance type rotating machine includes a stator having armature windings arranged on an inner periphery of the stator, a rotor having projection portion forming magnetic poles, and a plurality of permanent magnets arranged on both side faces of the projection portions. Owing to the provision of the permanent magnets, it is possible to restrain magnetic fluxes of the armature windings of the stator from leaking toward interpole portions between the magnetic poles. The power output of the machine can be improved by increased effective fluxes.

Abstract: A motor having permanent magnets received therein includes a rotor having a plurality of circular sheet irons deposited in turn, a plurality pairs of magnet receiving slots formed through the deposited sheet irons at a predetermined angle toward the outer surface of the rotor, and permanent magnets of different polarities received into the magnet receiving slots, wherein a magnetic flux leakage preventive groove having a predetermined width and depth is formed at the outer surface of the rotor at the center between the pair of magnet receiving slots.

Abstract: An inductor-alternator provides highly efficient conversion between mechanical and electrical energy. The inductor-alternator produces increased output by providing armature coils in a single air gap formed between two halves of a toothed rotor. In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within the rotating rotor. Airgap armature coils are mounted with the field coils to form a stationary assembly that is placed within the single air gap in the rotor so that the changing flux density (due to the rotating teeth) induces an output voltage in the armature coils. The rotor and stationary assembly are mounted in a housing by bolts that may also be used as terminals for the armature coils to reduce assembly complexity and production cost. The combined assembly provides high energy and power density because tip speed of the rotor is maximized and the use of air gaps is minimized.

Abstract: In a switched reluctance machine, the air gap between aligned rotor and stator poles is defined to have an inner region of substantially uniform length and outer regions of increasing length. The outer regions are flanked by extension portions on one or both of the poles that form a radiussed transition region on the pole between each outer region and a side wall of the pole. The at least one of the poles has a waist portion between the extension portions and the body of the lamination. As the rotor rotates with respect to the stator, alignment of the poles more gradually modifies the flux path such that radial forces tending to distort the stator and give rise to vibration and acoustic noise are reduced. The waist portion decreases the inductance of the stator winding in the minimum inductance position of the rotor.

Abstract: A rotor for a two-pole synchronous reluctance or a switched reluctance motor can be constructed from a stack of flat, planar laminations of grain-oriented materials. To enhance the necessary anisotropy of reluctance, slots are provided in the lamination along the magnetic flux lines in the preferred grain direction. The laminations may be provided with an essentially circular outer perimeter, and slots for a squirrel cage winding provided. A complete, efficient squirrel cage winding can thus be provided for a two-pole synchronous reluctance motor for starting purposes.

Abstract: A switched reluctance machine includes a first element having a plurality of uniform poles and a second element having a first pole and a second pole. The first pole has a wide face and the second pole has a narrow pole face. The first and second elements are disposed for movement relative to each other such that the wide and narrow poles are moveable in spaced relation to the plurality of uniform poles.

Abstract: A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34, 49, 63, 64) and the rotor (20, 21, 41, 61) which carries the PM poles. Several modes of operation are introduced depending on the magnitude and polarity of current in the field weakening coils (35, 44, 45, 71, 72). The invention is particularly useful for, but not limited to, the electric vehicle drives and PM generators.

Abstract: A switched reluctance motor driven by a two-phase source, includes a stator having an even number of evenly-spaced, like stator poles defining a gap between each stator pole; windings for each of the two phases of the motor wound about stator poles that are circumferentially separated by a winding and an associated stator pole of a different phase; and a rotor mounted for rotation relative to the stator, the rotor having an even number of rotor poles, the rotor poles being dimensioned such that when the phases are alternately energized, the rotor poles operatively interact with the stator poles such that the motor advances sequentially to a first state wherein one-third of the rotor poles are magnetically coupled to a like number of the stator poles, to a second state wherein two-thirds of the rotor poles are magnetically coupled to a like number of stator poles and to a third state wherein all of the rotor poles are magnetically coupled to a like number of stator poles.

Abstract: An electrical machine includes a stator and a rotor. The stator includes on its internal face at least one induction winding housed in a pair of recesses and a series of housings for excitation means. The rotor does not have windings and includes teeth for establishing variable magnetic fluxes in the induction winding. The excitation brings into play permanent magnets adapted to establish a closed circumferential magnetic flux in the stator and excitation windings locally establishing an adjustable magnetic flux in the reverse circumferential direction. The rotor teeth are adapted to effect a flux commutation in the stator and the, or each, permanent magnet occupies an angular position located between the angular positions of the two arms of a common induction winding. In this way an alternating magnetic flux is produced in the induction winding or windings during the rotation of the rotor.

Abstract: A switched reluctance machine includes a first element having a plurality of uniform poles and a second element having a first pole and a second pole. The first pole has a wide face and the second pole has a narrow pole face. The first and second elements are disposed for movement relative to each other such that the wide and narrow poles are moveable in spaced relation to the plurality of uniform poles.

Abstract: Energy converters characterized by low manufacturing costs, high efficiency, and low weight are required to generate electric energy in vehicles. The disclosed energy converter which is arranged in or on the hub of a vehicle wheel has a generator designed as a reluctance generator. An electric energy accumulator temporarily stores the generated electric energy and, when required, uniformly transmits it to consumers. Power electronics and the electric energy accumulator are preferably also arranged in or on the wheel hub. The invention provides an efficient, light, and cost-effective energy converter system which ensures a highly reliable supply and is preferably used in light, muscle-driven vehicles.

Abstract: A switched reluctance motor having a stator with a plurality of radially oriented stator poles. Windings for three phases are wound about the stator poles wherein a stator pole of a first phase is disposed circumferentially between a winding and an associated stator pole of a second phase and a winding and an associated stator pole of a third phase. A rotor is mounted for rotation relative to the stator. The rotor has a wide rotor pole and a narrow rotor pole. The rotor poles are distributed on the rotor wherein a narrow rotor pole is disposed to each side of a wide rotor pole in a direction of rotation.

Abstract: A variable reluctance electric motor includes a hollow cylindrical stator having a plurality of radially inwardly extending poles. Each of the stator poles is generally rectangular in cross sectional shape and is bifurcated into two stator teeth at its radially innermost end by a central, longitudinally extending slot. The outer circumferential edges of the stator pole teeth are beveled at their respective junctions with the sides of the stator pole. A stator pole gap width is defined between adjacent stator poles. A slot width is defined within each of the stator poles between the adjacent longitudinally extending edges of the slot. The ratio of the stator pole gap width to the stator pole slot width is in the range of from about 1.8 to about 2.3. A cylindrical rotor is co-axially supported within the stator for relative rotational movement. The rotor has a plurality of radially outwardly extending poles formed thereon. Each of the rotor poles is generally rectangular in cross sectional shape.

Abstract: A hybrid single-phase variable reluctance motor system has a stator (1) having a pair of oppositely disposed salient main poles (4) provided with main windings (12) and at least one pair of oppositely disposed salient auxiliary poles (5, 6) provided with auxiliary windings (13, 14) and disposed intermediate the main poles (4) on the stator (1). Furthermore the motor system has a rotor (2) having a pair of oppositely disposed salient poles (7) without windings. Additionally the motor system includes a control circuit (11) for rotating the rotor (2) during normal running by supplying current pulses to the main stator windings (12) in synchronism with rotation of the rotor (2) and for rotating the rotor (2) on starting by supplying current pulses to both the main and auxiliary stator windings (12, 13, 14) in synchronism with rotation of the rotor (2).

Abstract: A speed sensor assembly is mounted to a steering knuckle with a threaded fastener. The fastener is initially hand tightened until it is axially obstructed by a spacer provided on the speed sensor assembly. A tool then is used to apply high torque to the fastener so as to deflect or break away the spacer so that the speed sensor assembly may be tightly clamped to the steering knuckle by the fastener. The spacer prevents hand tightened speed sensor assemblies from being properly aligned with a tone wheel. Unless a tool is used to fully seat the speed sensor assembly, the assembly will give a false test signal indicative of improper or incomplete mounting.

Abstract: An axial field motor/generator having a rotor that includes at least three annular discs magnetized to provide multiple sector-shaped poles. Each sector has a polarity opposite that of an adjacent sector, and each sector is polarized through the thickness of the disc. The poles of each magnet are aligned with opposite poles of each adjacent magnet. Metal members adjacent the outermost two magnets contain the flux. The motor/generator also has a stator that includes a stator assembly between each two adjacent magnets. Each stator assembly includes one or more conductors or windings. Although the conductors may be formed of wire having a round, uniform cross-section, they may alternatively be formed of conductors having a tapered cross-section that corresponds to the taper of the sectors in order to maximize the density of the conductor in the gap between axially adjacent poles. The conductors may also alternatively be formed of traces in a printed circuit, which may have one or more layers.

Abstract: A reluctance machine system including a reluctance machine having a stator including at least one phase winding and a rotor defining rotor poles and inter-pole gaps, where permanent magnet inserts are positioned within the inter-pole gaps to interact with the currents in the phase windings to provide permanent magnet torque and to improve the machine's performance.

Abstract: A switched reluctance motor, comprising:a stator formed from a magnetically permeable material, having "n" number of evenly spaced, radially oriented, like stator poles, the stator poles having like stator pole faces and forming a uniform gap between adjacent stator poles;windings for two phases wound about stator poles that are circumferentially separated by a winding and an associated stator pole of a different phase;a rotor mounted for rotation relative to the stator about an axis, the rotor having at least two rotor sections, a first of the at least two rotor sections including at least 1/4 "n" number of like, wide rotor poles, each having a like, wide rotor pole face, and a second of the at least two rotor sections including at least 1/4 "n" number of like, narrow rotor poles, each having a like, narrow rotor pole face, the rotor having:a first angular position wherein a first portion of the wide rotor pole faces of the first rotor section are in alignment with a first pair of opposite, energized stator

Abstract: An improvement in a generator having a rotor, a stator, a magnetic field structure disposed on one of the rotor and the stator and an armature winding disposed on the other end of the rotor and the stator wherein the armature winding is disposed in a useful flux path comprises an additional armature winding disposed in a leakage flux path wherein auxiliary power is developed by the additional armature winding for one or more electrical loads.

Abstract: A rotating electrical machine including a rotor (2), the magnetic circuit of which carries excitation members, and a stator (16), the magnetic circuit of which carries a stator coil. The magnetic circuit of the rotor includes a shaft (1) on which are mounted end flanges (3) and at least one toothed disk (4) disposed between the end flanges, the teeth of the toothed disk being regularly spaced at its periphery, and at least one annular member (9) mounted on the end flanges and having slots (10) regularly distributed at its periphery and in each of which is engaged one tooth of at least one toothed disk. The end flanges and the toothed disk are spaced apart by gaps in which excitation members (14, 15) are accommodated.

Abstract: A method and apparatus for reducing winding failures in reluctance machines wherein winding coils for the switched reluctance motor are formed and positioned such that the turn-to-ground capacitance of the portion of the winding coil coupled to an electronic motor controller is reduced. Alternate embodiments are disclosed wherein additional insulation, and capacitive voltage distributors are provided to enable a switched reluctance motor to better handle the voltage stresses produced when high frequency or high dV/dt voltage pulses are provided to the motor.

Abstract: The clearance between the stator pole portions and the rotor pole portions at the axial central portion is larger than the clearance therebetween at the axial end portions. According to these characteristics, the magnetic attracting force causing objectionable acoustic noise is increased at the axial end portions of the housing and the stator in which stiffness against the magnetic attracting force is high and decreased at the axial central portion in which their stiffness against the magnetic attracting force is low. Thereby, the objectionable acoustic noise is reduced without changing the motoring torque and increasing the weight of the switched reluctance motor.

Abstract: This invention provides a novel switched reluctance machine and a method of its control. The machine rotor has rotor poles that are wider than the stator pole, which allows two phases to be energized simultaneously, reducing torque ripple and noise.

Abstract: A rotary electric motor has a stator core (1) with salient poles (4, 3), some of them ferromagnetic and some of them permanent-magnetic, which are spaced-apart and which are all simultaneously magnetizable by means of a magnetizing winding (5A, 5B). The rotor core has either reluctance poles (7) with intervening pole gaps and constant pole pitch, or permanent-magnetic poles (10) with constant pole pitch and without intervening pole gaps, alternating poles being of opposite polarities. Each reluctance pole (7) or permanent-magnetic pole (10) has a width which over a portion of the pole corresponds to respectively one-half of or the full pole pitch and is smaller over the remaining portion so that each pole (7 or 10) has a part (7B or 10A) which projects in a direction common to all poles. The ferromagnetic and permanent-magnetic poles (3, 4) of the stator (1) have a width corresponding to the width of the narrower portion of the poles (7 or 10) of the rotor (2).