Abstract: An auxiliary power source comprising a generator driven by an electric motor or other drive means, the rotor of the generator has multiple core elements mounted side-by-side to provide a large number of poles and accordingly, a relatively high output frequency. Specially dimensioned pole faces eliminate cyclic air gap reluctance variations as an audible noise source.

Abstract: An alternator includes a flywheel for storing kinetic energy. A motor generator, which includes permanent magnets mounted to a rotor, receives electrical power for accelerating the rotor to a high rotational velocity to store kinetic energy. The rotor is provided with coils, and each coil is connected to first and second conductors. The exterior portion of the rotor comprises the flywheel. Stator coils are mounted adjacent to coils of the rotor and electrical power is produced within the stator coils. The kinetic energy stored in the rotor flywheel can be transformed to electrical power through a first output which is the coils of the motor generator and can produce a second electrical output through the stator coils of the alternator. The primary application of such a dual power alternator is to produce a high power pulse for an electromagnetic gun, and to also provide averaging power to supplement the power from the main drive engine of a vehicle.

Abstract: A bearing system for positioning and supporting a rotor having a vertical shaft coincident with a main rotation axis included in a flywheel used for energy storage and high surge power in vehicular applications includes first and second radial force generators disposed in a first plane perpendicular to the rotation axis of the rotor, the first and second force generators including only electromagnets, third and fourth radial force generators disposed in a second plane perpendicular to the rotation axis of the rotor, the third and fourth force generators including only electromagnets, and upper and lower axial force generators each containing an electromagnet and a permanent magnet. According to one aspect of the bearing system, each of the force generators includes control circuitry having simple and complex lead networks so as to permit the force generators to rapidly respond to vehicular transients while maintaining a desired bearing stiffness.

Abstract: An electric drive unit for a vehicle is disclosed which has two electric machines axially aligned and connected with each other in mirror image. Each electric machine has a casing (3), a rotor (2) having a wheel body (16), an inner annular stator (4) including stator windings (5), having an axial, substantially cylindrical recess (11). The stator is attached to the casing (3), a rotor shaft (7) is attached to the wheel body (16) and extends into the substantially cylindrical axial recess (11) of the stator (4). There are first mounting means (20) rotatably mounted within the housing and relative thereto for mounting the rotor shaft (7); and an output coupling means (8, 9, 19, 25, 26) having a connecting flange (25, 26) for detachably connecting an output shaft thereto, the output coupling means (8, 9, 19, 25, 2 86) being disposed substantially within the axial cylindrical recess (11).

Abstract: In the electric motor/generator arrangement described in the specification, a hollow cylindrical generator rotor is mounted on an input shaft connected to an internal combustion engine and a hollow cylindrical electric motor rotor is connected to an output shaft. Both rotors have circumferential rings of permanent magnets of alternately opposite polarity, and the rings are disposed in axially-spaced relation. A stator has at least one switchable short-circuit winding arranged so as to be displaceable by a displacement device over a wide range adjacent to the permanent magnets of the rotors. Magnetic field sensors disposed between the permanent magnets in each ring detect the polarity of adjacent permanent magnets in the other ring, and the short-circuit winding is closed or opened as a function of the sensor signals.

Abstract: A magnetic coupler has a magnetic disc containing permanent magnets located between two electroconductive plates and separated therefrom by air gaps. The magnetic disc and electroconductive plates are mounted on coaxial or parallel-spaced input and output shafts so that rotation of the input shaft causes rotation of the output shaft by way of magnetic friction between the permanent magnets and the electroconductive plates.

Abstract: A DC electric motor system includes a rotor portion having a commutator and a coil winding mounted radially about a shaft, and a stator portion including two rows of spaced permanent magnets about either side of the rotor coil winding. Pick-up coils are mounted about the circumference of the electric motor to pick up energy produced by the change in magnetic flux about the edges of the rotor coil winding. The pick-ups coils transfer the collected energy as current for use in charging a battery within an electric vehicle, or the like.

Abstract: A Direct Current drive system with a multiplicity of applications including that of powering electric vehicles. The system contains a hybrid electric motor formed by a unique synchronous arrangement of two electrical motors, a primary and a secondary. The single input of Direct Current to the primary motor enables the secondary motor to operate on the Alternating Current generated in the primary motor, and in doing so captures the transformation of energy that takes place during the collapse of a magnetic field. This captured energy is then used to help drive the secondary motor, thus greatly increasing efficiency. A brake/alternator is included to provide a means of slowing/ stopping the motor while at the same time assisting in recharging the primary power source by sending current through a rectifier to the battery which powers the motor.

Abstract: A motor-generator set stator core includes a plurality of flat thin annular winding support plates, a pair of improved annular end plates, and a plurality of elongated flat attachment members for retaining the end plates and support plates assembled together. The improved annular end plates have substantially right triangular configurations in cross-section which are the reverse or a mirror image of one another. At hypotenuses of the right triangular cross-sections of the end plates are inner surfaces which have tapered or conical configurations that are the reverse of one another so as to conform to the outside tapered profile of the end turns of the stator windings. At short sides of the right triangular cross-sections of the end plates are radial planar surfaces which engage the opposite outer side portions of the stacked support plates.

Abstract: An integrated APU is provided having a combined starter/generator device mounted within the gearbox housing so as to reduce the number of reduction gears, bearings and other redundant components sufficiently to eliminate the need for a separate lubrication oil scavenger pump as well. Further integration and savings can be achieved by de-coupling the fuel pump and lubrication pump from the gearbox and driving those pumps instead by an electric motor.

Abstract: A magnetic bearing system has a magnetic bearing and an electric generator for activating the magnetic bearing. The various components of the system are mounted respectively on a rotor and a stator. The magnetic bearing is of the magnetic attraction type or of the Lorentz force type. It has first and second subassemblies, one of which is on the rotor and the other of which is on the stator. The generator has at least one magnet subassembly and at least one loop subassembly, one of which is on the rotor and the other of which is on the stator. The magnet subassembly has field magnets for creating magnetic fields. The loop subassembly has loops which travel through the magnetic fields.

Abstract: An electric machine according to various aspects of the invention includes a transformer having a rotating component for transmitting power from a stationary portion of the machine to a rotating portion of the machine, or vice versa. Both the rotating component and a stationary component of the transformer includes a winding, wherein the windings are disposed to be magnetically coupled. Current provided to the winding of the stationary component generates a magnetic field, which induces current in the winding of the rotating component.

Abstract: A DC compound motor of the type having a series winding and a shunt field winding includes an auxiliary generator driven by the motor for supplying power to the shunt field winding. The generator can be chosen, or a control circuit added, to control the current supply to the shunt field winding based on the speed of the motor.

Abstract: A high efficiency multi-phasic type DC motor incorporating brushless electronic switching to phase the attractive and repulsive forces between the permanent magnets in the rotor and wire wound air core coils in the stator. The unequal number of magnets and coils provides a designed imbalance, so that proper energization induces rotation and torque in the motor's dual flywheel rotor. Electronic switching collects inductive kickback and back emf simultaneously during the motor phase and in addition, disconnects the attraction and repulsion phases during regenerative braking, etc. and directs all this generated power back to the power pack where it is stored in batteries and capacitors. The rechargeable batteries and capacitors in the power pack are the source of operating electrical power for the motor.

Abstract: A vehicle transmission system is described which employs a split power path design to achieve continuously variable speed ratios. A motor-generator unit is provided for converting a fraction of the input power into electrical power, and a second motor-generator and differential gear mechanism are employed to re-combine the two power components before transmitting the mechanical power through a gearbox. Electrical power dissipation means allows the transmission system to provide slippage when accelerating a load from rest, and it also assists in shifting and in braking. An electronic motor controller coordinates feedback signals from various sensors and controls the dynamic performance of the entire system. The motor-generators are integrated with the housing of the transmission and have water jackets to assist in heat dissipation. The motor-generator pair and the power dissipation elements are all cooled by a circulating fluid which transfers heat from these components to an external heat exchanger.

Abstract: A generator engine set includes a brush partition for separating a space defined between an air blower housing and an enclosure into two areas so that an air flow from one area to the other area is substantially prohibited. The brush partition includes a flexible bristle portion and a rigid spline portion. The spline portion is retained in a receiving member on an outer surface of the air blower housing by a clip. The bristle portion extends toward the enclosure and engages an inner surface of the enclosure. Accordingly, a warmed air flow is prohibited from recirculating back into cooling air inlets.

Abstract: In a power supply for use with electronic equipment, the power supply includes a dynamic transformer having a single rotary element with permanent magnets attached, magnetic bearings to support the rotary element during operation, primary and secondary windings linking the flux of the magnets, circuit means to drive the primary windings, and means of using the secondary AC output to provide DC power at the point of use.

Abstract: A switch is used to disable electrical generation by causing a short circuit in a rotating main generator field of a brushless, synchronous generator to protect against transients voltage spikes during start-up. The switch is located inside of a hollow rotor shaft of the generator. In one embodiment the switch is activated by a solenoid assembly. In a second embodiment, the switch is activated by a alternate or redundant method by oil flow through the rotor shaft.

Abstract: An induction synchronous motor with two rotor cores and two stator cores includes a rotor having two mutually connected first rotor windings (31,31) of a predetermined number of poles and two mutually connected second rotor windings (33,34) connected of a different number of poles with respect to the number of poles of the first rotor windings; and two stators having two stator windings (21,22) of the number of poles identical with the number of poles of the first rotor windings (31,32) and two excitation windings (41,42) of the number of poles identical with the number of poles of the second rotor windings (33,34). The motor further includes a rectifier circuit (35) for rectifying outputs from the second rotor windings (33,34) and supplying the rectified voltages to the first rotor windings (31,32) at a synchronous operation. A phase shifter (SW1) associated with the first stator windings (21,22) produces a phase difference of 180.degree.

Abstract: A frequency generator includes a frequency generating magnet, a plurality of generating coils arranged at the polar periphery of the frequency generating magnet, the coils each comprising linear elements located at a distance from the frequency generating magnet such that the linear elements of the coils detect the same magnetic signals at the same time, the coils being crossed with each other, and a plurality of canceling coils provided on one side of the direction in which the generating coils are arranged with respect to the frequency generating magnet, the canceling coils and the generating coils being alternately connected in series.

Abstract: A device for starting an engine and generating power comprising a frame attached to a main body of an engine, a stator core fixed in the frame and attached with a stator coil, a field core attached to an inner end face of the frame, having a clearance in the radial direction between the field core and an inner peripheral portion of the stator core and accommodating a field coil, a claw-pole type rotating field electrodes disposed between the stator core and the field core interposing air-gaps respectively among the field electrodes, the stator core and the field core, a driving shaft passing through an inner diameter portion of the field core and supported thereby through bearings, a planetary gear device interposed between a crankshaft and the driving shaft an end portion of which is fixed with a sun gear which decelerates and transmits first rotation of the driving shaft to the crankshaft in starting an engine and accelerates and transmits second rotation of the crankshaft to the driving shaft in generating

Abstract: A vehicle having an electro-generating system which includes a dynamoelectric generator. The shaft of the dynamoelectric generator is linked directly or indirectly with the rotating axle of the road wheels of the vehicle, preferably via a mechanical turns amplifier. The turns amplifier will multiply the rotation rate of the electro-generating system and increase the production capacity of electric power. The dynamoelectric generator can be utilized to recharge a storage battery driving the vehicle while the car is in motion, especially automatically when the vehicle is going down hill. The vehicle's electric motor can be driven directly from a dynamoelectric generator in place of a storage battery after the vehicle is moving. In railroad cars (freight and passenger) the electro-generating system can be utilized to charge storage batteries, with their electricity utilized for other electro-energy requirements.

Abstract: A recorder motor with an encoder, for forming an image on a record medium in accordance with image information, has the encoder on the outside of the motor case and a plastic dust-proof cover for the encoder mounted on the case. Thus, contamination by dust or ink mist is prevented, and stable and high precision motor rotation is maintained.

Abstract: A mechanization of a vehicular starter/generator machine having minimal impact on the vehicle powertrain. The powertrain includes an engine connected to drive the vehicle through a fluid torque converter and a power transmission. The rotor of the starter/generator machine is formed on the outer circumference of an input shell of the torque converter, and the stator of the machine is formed on the inner circumference of the torque converter housing. This mechanization affords the use of a relatively high capacity machine without appreciably affecting the powertrain packaging.

Abstract: A miniature motor with a revolution-detecting generator, the motor having a stator formed by a permanent magnet on the motor housing and a rotor consisting of a winding on a core. Electric current is fed to the rotor winding via current feeding brushes and a commutator. A revolution-detecting generator comprising a frequency-detecting coil for receiving changes of magnet flux made by teeth on stator and rotor components generates an induced voltage proportional to the revolution of the rotor, in which a noise-suppressing coil wound in a lapped state with the frequency-detecting coil is provided. The noise-suppressing coil and the frequency-detecting coil are connected with each other in a reverse phase, and the noise-suppressing coil is connected in parallel with the frequency-detecting coil via a high-pass filter connected in series.

Abstract: A flywheel type energy storage apparatus for use in an uninterruptible power supply has an induction motor which serves as a generator/motor, in which a rotor (65) of the induction motor is constituted by incorporation of a rotor core (62) and a flywheel (64) with a rotor shaft (56) vertically born by a pivot bearing (55) and a magnetic bearing (67).

Abstract: An alternating current generating system (40) for an air frame producing an output potential in accordance with the invention includes a generator (42) for generating current having a rotor (46) mounted on a shaft (50) which is rotatably driven and a stator (58) from which current is outputted; a variable reluctance generator (44) for generating alternating current outputted from a stator (62) and having a rotor (48) mounted on the shaft to cause alternating current to be generated by the stator and a voltage regulator (84), coupled to the generator for generating current, to an output of (88) of the variable reluctance generator and to an excitation winding (86) of the variable reluctance generator, for producing excitation current applied to the stator of the variable reluctance generator to regulate the voltage outputted by the variable reluctance generator.

Abstract: A miniature motor with a frequency generator comprising a motor portion having a stator with a permanent magnet for forming a magnetic field and a rotor with rotor windings wound on a rotor core; electric current being fed to the rotor windings via a commutator making sliding contact with brushes, and a frequency generator for detecting the revolution of the motor, in which the frequency generator comprises a frequency generator rotor, mounted on the motor rotor, having a disc-like rotor portion made of a soft magnetic material and equipped with a plurality of magnetic-pole teeth on the outer periphery thereof, an internal-gear core of an annular disc shape, made of a soft magnetic material, disposed in such a manner as to come in contact with the inside of a motor housing and face the outer circumferential surface of the rotor portion and equipped with a plurality of magnetic-pole teeth on the inner periphery thereof, a permanent magnet forming a magnetic field between the magnetic-pole teeth of the rotor po

Abstract: A resonant rotationally oscillating mechanical system has masses supported by a resilient structure held at both ends on a stationary base to define a natural resonance frequency of intended rotational motion about an axis relative to the base. The resilient structure is asymmetrical along the axis. The masses are subject to additional motion relative to the base in directions different from the direction of intended motion. For a selected mode of motion, the masses and the asymmetrical resilient structure are mutually configured, in accordance with equations of motion, to substantially preclude angular motion of one of the masses relative to the base about an axis other than the axis of the intended rotational motion. In another aspect, the resilient structure has one end attached to the base by a coupler that permits that end to move relative to the base, but only at frequencies different from the natural resonance frequency of motion.

Abstract: Disclosed are a starter and power generator which starts an engine and which is subsequently driven by the engine to generate power, and a motor used in the starter, in particular, a self-controlled commutatorless motor in which a rotating magnetic field is developed across the stator in accordance with an angle of rotation of the rotor. Normally, output matching means is connected to the three phase windings of the stator, whereby an alternator is defined by the combination of the rotor, the stator and the output matching means. However, in response to a starting command, energizing means is substituted for the output matching means, whereby a combination of the rotor, the stator, timing means and energizing means form a commutatorless motor. Thus, subsequent to starting the engine, the motor is driven by the engine to generate power.

Abstract: A high-speed motor/generator drivable by a turbine includes a rotor mounted on the shaft of the turbine. Since the magnetic flux produced by the magnet of the rotor vary at a high frequency, a ferrite core of good high frequency characteristics is employed as a stator core confronting the rotor to reduce a high-frequency loss. To improve the flux density and magnetic permeability of the ferrite core (which one poorer than those of a core of silicon steel plates), the magnet of the rotor has a number of magnetic poles to increase the frequency at which the magnetic flux is varied, so that the electromotive force produced is increased.

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: An electric generator organization, particularly adapted for small vehicles such as motorcycles, is described in which a rectifier mechanism electrically disposed between the stator and the rotor is mechanically connected to the rotor for rotation therewith during engine startup and disconnected therefrom during periods of normal engine operation. An operating circuit enables efficient transmission of electric current from the battery to starting coils in the generator only during the period of engine startup. During periods of normal engine operation, the transmission of electric current is from generating coils in the generator to the battery. Included in the operating circuit is an engine operation detector that prevents excessive current feed from the generator coils to the rectifier mechanism.

Abstract: In an engine starting and charging device mounted between an engine body and a clutch, major parts of the clutch 16 are disposed in a recess 25 formed in the axial direction in the end of the revolving-field pole 102a on the clutch side, to decrease the axial length from the engine to the clutch.

Abstract: A rotary power module construction especially useful in computer room application. A motor-generator set consisting of an induction motor and synchronous generator is mounted vertically and a direct drive is provided between the components by an electrically insulating coupling. A flywheel is mounted on a shaft of the synchronous generator to provide a maximum ride through condition for short term power outages. A plurality of spider-like leg members envelop the flywheel providing retainment protection for the flywheel as well as providing a suitable support for the synchronous generator. The spider-like leg members are anchored to a plate member which is secured to a non-rotating part of the induction motor. The motor-generator set is encased within a housing that is serviced only from the front of the housing, thereby occupying a minimum amount of space in the computer room.

Abstract: When operating a synchronous machine as a synchronous generator, a suppression resistor is required across the main generator field. However when operating the synchronous machine as an induction motor, a current is induced in the main generator field which is typically greater than the current carrying capability of the suppression resistor.In order to overcome the foregoing problem, the present invention provides a centrifugally activated switch for mounting on a rotor and which provides an alternate current path for the induced current.

Abstract: An alternator/synchronous motor structure provides varying-reluctance paths for radially directed, unidirectional magnetic fields by means of a unique rotor-stator configuration in which inner- and outer-rotor poles and a rotor pole-connecting means surround one end and the inner- and outer-cylindrical surfaces of a hollow cylindrical stator. At least one of the inner or outer poles includes at least one field concentrator member. Optional excitation field may be provided by a stationary winding requiring no brushes for energizing or by permanent magnetization.

Abstract: An electric generator for use in a turbocharger includes a rotor mounted on the rotational shaft of the turbocharger and comprising a single permanent magnet fitted in an outer cylindrical sleeve which prevents the rotor from breakage upon high-speed rotaiton thereof. The rotor also includes heat insulation between the permanent magnet and the rotational shaft. The heat insulation portion may be an air gap or a heat insulating member.

Abstract: A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further primary winding, and further having a reduced cross section area in the flux conducting structure of the combined transformer and motor for improving the regulation of the output voltage.

Abstract: A frequency generator comprises a cylindrical rotor to which an annular multipolar magnet is fixed on the inner wall thereof. The multipolar magnet includes a plurality of magnetizable sectors arranged in a circumferential direction thereof, and adjacent magnetizable sectors are magnetized alternately in reverse polarity. Within the rotor, two disk-shaped magnetic plates are supported fixedly with a predetermined space axially. On the peripheries of respective magnetic plates, a plurality of salient poles are formed with a predetermined pitch in a circumferential direction thereof. The salient poles of each magnetic plate respectively constitute a salient-pole line. Between the two salient-pole lines, a generating coil is wound in a circumferential direction thereof. To each first and second salient poles to be paired, the magnetizable sectors of different polarity of the multipolar magnet are faced in divergence relatively in the circumferential direction.

Abstract: A generator system having self-build-up characteristics with an integral permanent magnet generator exciter. A rotor shaft is journalled in a housing. A main stator is secured within the housing, and a rotating field is magnetically coupled to the main stator and secured to the rotor shaft for rotation therewith. An exciter field is secured within the housing, and an exciter armature is magnetically coupled to the exciter field and secured to the rotor shaft for rotation therewith. A plurality of permanent magnets are integrally secured to a radially inner periphery of the exciter field immediately adjacent a radially outer periphery of the exciter armature.

Abstract: A device for feeding electricity into a Faraday cage comprises an electrical generator (8), a generator drive motor (3), and a linkage (12, 24) for mechanically coupling the generator and the motor. The device is characterized in that it includes linkages (2, 12, 24) for electrically isolating the motor and the generator from each other, together with an electromagnetic screening element (7, 15; 20) surrounding the generator and connected to the Faraday cage, the screening element including at least one waveguide passage (14, 25) through which the mechanical coupler extends.

Abstract: A motor-generator set includes a rotatable central shaft and an AC rotor and a DC rotor being supported in tandem relationship along the shaft for rotation therewith. A liquid coolant flow path is defined in a series relationship through the shaft and rotors. A first portion of the serial liquid coolant flow path runs into and through a first single bore in one end portion of the shaft, a second portion of the serial flow path runs through the AC rotor, a third portion of the serial flow path runs through a middle portion of the shaft, a fourth portion of the serial path runs through the DC rotor, and a fifth portion of the serial flow path runs through and from an opposite end of the shaft.

Abstract: A motor has a stator having sequential groups of three coils designated 36, 37 and 38. On at least one side of the stator is a rotor having permanent magnets, alternating N and S. The source of power (herein a battery) is connected by switches to energize all of the coils 36 and 38, alternately. This causes the rotor to rotate. All of coils 37 and 38 and also all the coils 36 or 37 which are not energized by the battery, as the magnetic fields of the rotor pass by act as alternators and current produced thereby passes through a rectifier to charge the battery. The switches are controlled by means on the rotor such as windows cut in the rotor passing an optical sensor.

Abstract: An inertial energy storage device including a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy including: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on the stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; and a rotor having a plurality of circumferentially spaced teeth facing the stator teeth, and a circumferential flywheel mass radially spaced from its rotational axis; and a motor control circuit including sensor means for sensing the position of the rotor relative to the stator; means, responsive to the sensor means, for generating a waveform for driving the machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of the waveform for driving the machine; and a current control circuit for controlling amplitude of the current provided to t

Abstract: In this electric motor and tachometric generator unit the generator comprises a rotor secured to the motor shaft and provided with a set of permanent magnets, and a fixed armature incorporating an armature winding. The commutation of the generator and motor windings is controlled by a coder via an electronic commutation circuit. The generator rotor is disc-shaped and the magnetic axes of the permanent magnets are parallel to the shaft. The movable portion of the coder is the generator rotor cooperating with a set of fixed magnetic sensors, preferably of the Hall type, mounted on one side of the generator rotor, the fixed armature being mounted on the other side of this rotor.

Abstract: A semiconductor electric motor is disclosed which comprises: an outer housing; a cylindrical magnetic core fixedly mounted to the inside of the outer housing; polyphase armature coils mounted upon the magnetic core; a rotative shaft rotatably held by bearings mounted upon the outer housing; a rotor which is fixed to the rotative shaft and which is excited by exciting coils mounted thereon in such a way that the outer surface is polarized south and north at regular intervals and that the produced magnetic field penetrates through the armature coils; a first core made from a magnetic material and centrally provided with a hole which is made stationary relative to the rotative shaft extending through the hole; a second core made from a magnetic material and fixed inside the outer housing; the first and second cores cooperating with secondary and primary coils respectively mounted upon the first and second cores to constitute a rotary transformer; an RF oscillator consisting of a semiconductor circuit and acting

Abstract: A generator that utilizes the magnetic flux lines of the earth and includes a base, a frame that is attached to the base, a shaft that has a free end and is rotatably mounted in the frame, components for rotating the shaft, a plurality of brushes that are mounted on the frame, at least one ring that is affixed to the free end of the shaft and which is in rotatable contact with the plurality of brushes, and an armature that is formed by coils of wire which are wound around a rod that is attached to the shaft, the coils of wire have free ends which are connected to at least one ring so that when the armature rotates the coils of wire cut the magnetic flux lines of the earth and cause an electric current to be generated at the plurality of brushes.

Abstract: A unitized (single unit) motor and flux switch alternator having stationary field, armature and motor windings which provides a magnetic path for some of the motor input power to feed through and increase the alternating current (AC) generator output. A rotor formed from a material having a high magnetic permeability (solid or laminated soft steel) is controlled in speed by controlling the magnitude and timing of the pulsed direct current (DC) supplied to the motor windings which may be wound on the stationary legs or the rotor. The current flow in the motor windings can be controlled by a mechanical commutator if the motor windings are on the rotor or by a solid-state converter if the motor windings are on the legs in a manner normally associated with brushless DC motors. The DC windings of the flux switch alternator can be replaced by permanent magnets since the reversing field in the AC output windings are predominantly time stationary.

Abstract: A mobile X-ray apparatus (20) is disclosed which incorporates a power supply (22) in which the energy for operation of the X-ray tube (21) is supplied from a flywheel (50) coupled to an electrical machine (24) which functions as both a motor and generator. In the motor mode of operation, a controller (21) provides power to the machine (24) to operate it as a motor and drive the flywheel up to a desired operating speed. Upon request of the operator to initiate an exposure, the controller power is disconnected from the machine and the power terminals (32) of the machine (24) are connected to a transformer and rectifier (27) which increases the generated voltage and rectifies it to provide the high voltage across the X-ray tube (21) required for proper exposures.