Abstract: The present invention is directed to the method of utilizing magnetic materials in permanent magnets and permanent magnet discs and surfaces, as a source of magnetic fields for producing rotational means, to produce a permanent magnet machine and utilizing this method to produce a powered means for use in remote pumping stations, geologic sensing stations both undersea and mountain top, remote electrical generating stations for inhabited areas of the planet off the power grid, power units for space stations, repair robots, planetary and lunar land rovers, astronomical research stations, electric generators, stabilization gyros and generators for autonomous robots, power units for motorized vehicles, and single person aircraft.

Abstract: There is provided an electric machine, which is configured such that magnetic poles provided on a stator and a mover or rotor of the electric machine have an asymmetric shape, thus being capable of reducing a torque ripple.

Abstract: An improved air core homopolar generator is provided. The improved homopolar generator employs a stator having an outer ring for bifurcating magnetic flux flow and multiple flux focusing magnets arranged around a common axis. The improved homopolar generator also includes an inner flux transmitter coaxial with the common axis.

Abstract: An electric motor has a rotor and a stator. The rotor or the stator has arced permanent magnets that have essentially the same inner radius (IR) and outer radius (OR). In an aspect, the stator has a stator housing having a plurality of poles. Each pole includes a plurality of flat magnets affixed to an inner surface of the stator housing. In an aspect, flats on the outside of the stator housing key the stator assembly in a power tool housing. In an aspect, flat magnets are pre-magnetized, pre-assembled with alternating magnetic polarities, inserted into a stator housing, and remagnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets and unmagnetized magnets are pre-assembled with unmagnetized magnets between magnetized magnets, the pre-assembled magnets inserted into a stator housing, and the unmagnetized magnets magnetized to a final, desired magnetic polarity configuration.

Abstract: A method for preparing the magnet includes the steps of: (a) providing a sintered Nd base magnet block having surfaces and a magnetization direction, (b) coating the surfaces of the magnet block excluding the surface perpendicular to the magnetization direction with a Dy or Tb oxide powder, a Dy or Tb fluoride powder, or a Dy or Tb-containing alloy powder, (c) treating the coated block at a high temperature for causing Dy or Tb to diffuse into the block, and (d) cutting the block in a plane perpendicular to the magnetization direction into a magnet segment having a coercive force distribution on the cut section that the coercive force is high at the periphery and lower toward the inside and a constant coercive force distribution in the magnetization direction.

Abstract: A DC motor comprises: a tubular metal case; a magnet that is provided along the inner surface of the metal case and has four or more of magnet poles in the circumferential direction; an armature that is arranged to face the magnet and composed of a core and a coil; and a shaft. The magnet is formed of a material with a maximum energy product BHmax of 3 to 6 MGOe. When the thickness of the magnet in the radial direction of the armature is indicated by T [mm] and the outer diameter of the core is indicated by d [mm], the ratio T/d of the thickness T of the magnet to the outer diameter d of the core is 0.16 or more.

Abstract: Magnetic poles are arranged such that the N pole and the S pole alternate in a circumferential direction. Two N poles face each other with an interval of 180° therebetween, and two S poles face each other with an interval of 180° therebetween. Each of the magnetization center of a North magnetic pole and the magnetization center of a South magnetic pole is positionally shifted from the center position between the magnetization centers of two magnetic poles of the other polarity located on opposite sides of the North or South magnetic pole. The magnetization centers of the magnetic poles are disposed in such a manner as to be positionally shifted from geometric centerlines. Brushes are disposed along the respective geometric centerlines. The magnetization centers of two adjacent magnetic poles are positionally shifted toward or away from each other by the same shift angle ? with respect to the respective geometric centerlines.

Abstract: Disclosed herein is a rotation power generating device. The rotation power generating device includes a stator consisting of a plurality of stationary units vertically connected to one another, and a rotator consisting of a plurality of rotating units vertically connected to one another with an angular orientation difference therebetween. Each of the stationary units has a pair of stationary magnets symmetrically embedded inside an inner surface thereof. Each of the rotating units has a pair of rotating magnets and is adapted to be rotated along the inner surface of the corresponding stationary unit about a rotating shaft that is installed in the center of the stator. The rotation power generating device compensates for energy loss of initially acting torque using repulsive force between magnets of the same polarity, resulting in reduced power loss and more effective transmission of energy.

Abstract: An electric machine has a stator and a rotor. The stator has a housing and at least one pair of magnetic poles. Each magnetic pole has a primary magnet and two auxiliary magnets disposed on respective sides of the primary magnet. All of the magnets are disposed on an inner surface of the housing. All the magnets of a magnetic pole have the same polarity.

Abstract: Described is a direct current motor (1) with permanent magnet stator, having at least four stator poles (5, 6, 7, 8) which are spaced at equal angular intervals about the rotation axis (A) of the rotor (3) and which generate a magnetic field that is asymmetrical about the rotation axis (A) of the rotor (3) and where the rotor winding (4) can be powered partially and selectively at least at two fixed, explementary angular sectors.

Abstract: A high-efficiency magnetic inductor rotary machine in which eddy current loss is reduced even if driven at super-high-speed rotation, and a fluid transfer apparatus that uses the same. In the magnetic inductor rotary machines, first and second stator cores are disposed coaxially such that circumferential positions of teeth are aligned, and first and second rotor cores are fixed coaxially to a rotating shaft such that salient poles are offset by a pitch of half a salient pole circumferentially, and are disposed on an inner peripheral side of the first and second stator cores. A salient pole width of the salient poles of the first and second rotor cores is configured so as to be greater than an opening width of slots of a stator.

Abstract: Magnetic poles are arranged such that the N pole and the S pole alternate in a circumferential direction. Two N poles face each other with an interval of 180° therebetween, and two S poles face each other with an interval of 180° therebetween. Each of the magnetization center of a North magnetic pole and the magnetization center of a South magnetic pole is positionally shifted from the center position between the magnetization centers of two magnetic poles of the other polarity located on opposite sides of the North or South magnetic pole. The magnetization centers of the magnetic poles are disposed in such a manner as to be positionally shifted from geometric centerlines. Brushes are disposed along the respective geometric centerlines. The magnetization centers of two adjacent magnetic poles are positionally shifted toward or away from each other by the same shift angle ? with respect to the respective geometric centerlines.

Abstract: A DC electric rotating machine, such as a starter of an automotive vehicle, includes a stator with salient poles having at least four poles distributed uniformly over the circumference of the stator, a rotor disposed inside the stator, a set of brushes adapted for the electric supply of the rotor, and at least two geometrically opposed salient poles. Each pole includes at least one substantially radial slot in a plane parallel to the axis of rotation of the rotor and preferably passes through the axis of the rotor. By minimizing the reaction fields of the armature, utilization of the magnetic material of the parts of the stator is balanced and a harmful armature reaction effect, which increases saturation of the polar parts of the inductor and which leads to reduction in the driving magnetic torque, is mitigated.

Abstract: A flux-focused, shaped permanent magnet includes a body of magnetic material having multiple surface contouring to form a reduced flux side with convex surfaces and an increased flux side with concave surfaces. The surfaces develop high and low resistance external flux paths creating focused asymmetric flux fields. A magnetic unit having the shaped permanent magnet and a magnetic flux attracter or two shaped permanent magnets interconnected by two segmented permanent magnets and a kinetic device having a stationary stator ring, a rotor disc rotating within the stator ring and a multiplicity of the magnetic units on the stator ring and the rotor disc, are also provided.

Abstract: In some embodiments, an electromagnetic motor/generator may include one or more of the following features: (a) a frame, (b) a magnetic section having an upper magnet, a lower magnet, and a center magnet, coupled to the frame, and (c) at least one solenoid coupled to the frame and the center magnet.

Abstract: Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into mechanical force or electrical energy.

Abstract: A direct current motor is comprised of an armature, magnets arranged to face each other through the armature, a commutator and brushes. The armature has a core and a plurality of coils wound on the core. Each magnet has a main part and an extension extending form the main part. The main part has an angular interval which corresponds to an interval of winding each coil, so that the extension is positioned outside the coil in the circumferential direction. During the commutation period of the coil, that is, during shorting of the coil by the brush, the amount of magnetic flux passing through the coil is changed by the extension of the magnet. Thus, an induction voltage is generated in the coil to counteract to a reactance voltage of the coil.

Abstract: Permanent magnet machines including doubly salient machines having one or more permanent magnets located at least partly and preferably entirely within the stator teeth, thereby avoiding weakening of the stator structure while reducing acoustic noise. The magnets may be located in only a subset of the stator teeth, thereby lowering magnet material and manufacturing costs, and all such magnets may have north poles directed toward an interior of the machine, resulting in reduced cogging and negative torques with improved torque densities. The permanent magnets may also extend within the stator teeth on an angle or diagonal, thereby allowing use of magnets which are wider than the teeth themselves to produce greater flux. Further, a magnetizing device having a single coil may be used to simultaneously magnetize all the stator magnets with a common polarity.

Abstract: The armature of a direct-current motor is formed by an armature core and armature coils. The core includes teeth, which are arranged at a pitch of a predetermined angle. The coils are wound about every group of selected teeth of a predetermined number. Two magnets face each other with the armature in between. Each magnet includes main portion, an extended portion, which extends from the main portion, and a first weak flux part. The first weak flux part is located in the vicinity of the border of the extended portion and the main portion. The first weak flux part extends along one pitch of the teeth. The flux of the first weak flux part gradually increases along the rotation direction of the armature. The motor also includes a commutator, which has segments. The segments are connected to each coil. A pair of brushes can contact each segment. The brushes supply current to the coils through the segments.

Abstract: A permanent magnet field-type compact DC motor having a high output and a low cogging torque is made by fixing a pair of rare earth magnets mainly composed of rare earth-iron-based rapidly quenched and solidified flakes to a soft magnetic frame so as to extend along an inner peripheral surface thereof, and by unsaturation-magnetizing the rare earth magnets so that demagnetization curves at circumferentially opposite end portions of the rare earth magnets are made smaller than a demagnetization curve at a central portion of a magnetic pole of each of the rare earth magnets.

Abstract: A permanent magnet electric machine with reduced cogging torque includes a plurality of axial rotor sections that are defined on a radially outer surface of a rotor. The axial rotor sections include a set of permanent magnets that are in an unmagnetized state and that have opposite edges that are aligned with an axis of the rotor. The axial rotor sections are rotationally offset such that the edges of the permanent magnets create stair step interfaces. The n sets of permanent magnets are magnetized using a magnetizing fixture. The permanent magnets have a generally rectangular shape and are preferably arc magnets or breadloaf magnets. The conductors of the magnetizing fixture are aligned with the stair step interfaces. A magnetic field induced in the permanent magnets is substantially reduced along the stair step interfaces.

Abstract: A direct current motor is comprised of an armature, magnets arranged to face each other through the armature, a commutator and brushes. The armature has a core and a plurality of coils wound on the core. Each magnet has a main part and an extension extending form the main part. The main part has an angular interval which corresponds to an interval of winding each coil, so that the extension is positioned outside the coil in the circumferential direction. During the commutation period of the coil, that is, during shorting of the coil by the brush, the amount of magnetic flux passing through the coil is changed by the extension of the magnet. Thus, an induction voltage is generated in the coil to counteract to a reactance voltage of the coil.

Abstract: A direct current motor is comprised of an armature, magnets arranged to face each other through the armature, a commutator and brushes. The armature has a core and a plurality of coils wound on the core. Each magnet has a main part and an extension extending form the main part. The main part has an angular interval which corresponds to an interval of winding each coil, so that the extension is positioned outside the coil in the circumferential direction. During the commutation period of the coil, that is, during shorting of the coil by the brush, the amount of magnetic flux passing through the coil is changed by the extension of the magnet. Thus, an induction voltage is generated in the coil to counteract to a reactance voltage of the coil.

Abstract: The invention pertains to electrical machines of the electromagnetic type employing a stator and a rotatable rotor such as electric motors and generators wherein magnetic forces imposed upon the rotor produce rotor rotation. The invention utilizes permanent magnets in either the stator or rotor assembly to control the magnetic flux flow in one direction and encourage the flux in the opposite direction in certain areas of the stator and rotor assembly. Rotating flux conducting metal shunts are disposed adjacent permanent magnets creating magnetic flux to control the flux flow and pattern to most effectively use the flux forces on the rotor resulting in very high efficiencies in motor or generator operation.