Abstract: A rotor includes a rotor core which is formed by stacking steel plates and includes a first through hole in a center part, at least one second through hole in the vicinity of the first through hole and a rivet insertion hole. The rotor also includes permanent magnets which are disposed in a circumferential direction of the rotor core and are embedded in a stacking direction of the steel plates; a main shaft which is shrink-fitted or press-fitted in the first through hole of the rotor core; a pin made of an insulating material and inserted in the second through hole of the rotor core; and an upper end plate and a lower end plate which are disposed on both ends of the rotor core in the stacking direction and are fixed by a rivet inserted in the rivet insertion hole.

Abstract: A method for generating and controlling power by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a desired non-HFAC power output; sensing desired power output parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the desired power output.

Abstract: Apparatus and method for tuning the magnetic field of windmill generators to obtain efficient operation over a broad RPM range. The windmill generator includes fixed windings (or stator) inside a rotating rotor carrying permanent magnets. The permanent magnets are generally cylindrical and have North and South poles formed longitudinally in the magnets. Magnetically conducting circuits are formed by the magnets residing in magnetic conducting pole pieces (for example, low carbon or soft steel, and/or laminated insulated layers, of non-magnetizable material). Rotating the permanent magnets, or rotating non-magnetically conducting shunting pieces, inside the pole pieces, either strengthens or weakens the resulting magnetic field to adjust the windmill generators for low RPM torque or for efficient high RPM efficiency. Varying the rotor magnetic field adjusts the voltage output of the windmill generators allowing the windmill generator to maintain a fixed voltage output.

Abstract: A single phase AC generator uses a rotor contained within a stator. The stator has an armature winding and a control winding which is capable of having its magnetic permeability adjusted, thereby limiting the output voltage of the armature winding. The stator additionally has two core sections.

Abstract: The rotary electric machine includes an armature core constituting a stator having an armature coil for charging a vehicle battery with its output voltage; rotor cores disposed inside the armature core with a predetermined gap therebetween and made up of magnetic pole parts formed as claw poles so that adjacent magnetic poles are different and cylindrical parts carrying a field coil; and permanent magnets provided in the magnetic circuit of the rotor cores for supplying magnetic flux along with the field coil to the armature core. The magnetizing force of the permanent magnets with respect to the armature core is set so that at a predetermined speed the output voltage of the armature coil immediately after a field current passed through the field coil is returned to zero from the maximum magnetizing force exerted by the field current does not exceed the charging voltage of the battery.

Abstract: A rotary electric machine is composed of an armature core, an armature winding, a rotor core disposed opposite said armature core, a rotary magnetic-flux source for supplying first magnetic flux to the rotor core, a frame for supporting the armature core and the rotor core and a stationary magnetic flux source, fixed to the frame, for supplying second magnetic flux to the rotor core in a direction to supplement the first magnetic flux.

Abstract: Protrusions (260) for adjusting the cogging torque of a rotor (21) are formed on a stator (22) in a small-size power generator (20). Since the protrusions (260) are formed on an inner periphery of a rotor accommodation hole (230) within an angular range of ±45° around a magnetic flux direction of a first magnetic circuit (100) having a smaller magnetic reluctance at a rotation center of the rotor (21), the cogging torque can be effectively reduced. Accordingly, even when the size of components such as an oscillating weight and a power spring is reduced for making a thin timepiece, rotation startability of the rotor can be improved, thus improving power generation efficiency of the small-size power generator.

Abstract: A rotary electric machine is composed of an armature core, an armature winding, a rotor core disposed opposite said armature core, a rotary magnetic-flux source for supplying first magnetic flux to the rotor core, a frame for supporting the armature core and the rotor core and a stationary magnetic flux source, fixed to the frame, for supplying second magnetic flux to the rotor core in a direction to supplement the first magnetic flux.

Abstract: In a power generator unit composed of a generator and a piston internal combustion engine as the drive, the rotor is driven by the crankshaft of the diesel engine, and carries permanent magnets to excite the generator while the stator of the generator is arranged within the rotor and carries the rotor winding of the generator. The stator of the generator is divided, for the purpose of voltage regulation, into an outside stator part that forms an air gap with the rotor, and an inside stator part that forms a control air gap with the outside stator part that surrounds it, and is mounted to rotate, relative to the outside stator part, in such a manner that the geometry of the control air gap changes with the rotational position, and that the rotation takes place as a function of the variations in the terminal voltage of the generator.

Abstract: A mechanical gear drive system capable of generating electric power comprises a plurality of gears having a plurality of teeth separated by a tooth gap, a U-shaped core having two legs separated by at least one tooth gap, and a yoke. This core is positioned in close proximity to the teeth of the gear. A coil is wound on the yoke, and a converter selectively couples and decouples this coil from a dc power source. The converter has at least a first and a second switch and at least a first and a second diode for cross-coupling the coil to the source to allow current flow back when the switches are disabled. The converter enables the switches prior to alignment of the teeth of the gear with the legs of the core. This couples the coil to the source of dc power and allows dc current to flow from the source through the switches and the coil. When the converter disables the switches after alignment of the teeth with the legs, the coil is decoupled from said source.

Abstract: A motor and/or generator functioning according to the reluctance principle, has stator sectors distributed over the circumference of the rotor, each with radially projecting pole shanks around which a concentrated exciter coil part is wrapped. The pole shanks are connected by a short-circuit yoke, in that the pole shanks are laterally offset at an angle relative to the radial center line of symmetry of the stator sector in question. This allows a significant reduction in the structural size, while guaranteeing the operational effectiveness.

Abstract: The present invention provides an improved alternator system in which the magnetic flux modulating sleeve is carried by the rotor and rotates with the rotor. The position of the sleeve on the rotor is adapted to be adjusted during operation of the alternator while the rotor and sleeve are rotating. The repositioning of the sleeve on the rotor during rotation beneficially provides a more constant voltage output during load and speed variations. Concurrent rotor and sleeve rotation reduces eddy current losses in the magnetic circuit and increases alternator efficiency. The alternator of the invention is estimated to provide a constant voltage for a 10:1 variation in either electrical load (in OHMS) or rotor angular velocity (revolutions per minute, RPM), or a combined 10:1 variation of electrical load and rotor angular velocity.

Abstract: This alternator includes a stator comprising an armature winding and a rotor comprising a permanent magnet field. A sleeve is located between the rotor and stator and comprises on its periphery alternating ferromagnetic and nonmagnetic segments. When the ferromagnetic segments are aligned with the poles of the stator, the flux linkage between the rotor and stator is maximum. When the nonmagnetic segments are aligned with the stator poles, the flux linkage is a minimum. The sleeve is shiftable through 90 electrical degrees by means of a motor. The output of the alternator may be regulated between maximum and minimum values by so shifting the sleeve.