| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310154280 | Specific magnetization | 17 |
| 20090026864 | FIELD CONTROLLABLE ROTATING ELECTRIC MACHINE SYSTEM WITH FLUX SHUNT CONTROL - In a magnet-exciting rotating electric machine, a magnetic field pole part opposing an armature is composed to be divided into a surface magnetic pole part and a magnetic excitation part so as to be capable of being relatively displaced. The magnetic excitation part supplies a magnetic flux to a magnetic salient pole. The magnetic flux from the field magnet is divided into a main magnetic flux pathway that circulates through the armature side and a bypass magnetic flux pathway that does not pass through the armature, and thereby, the magnetic flux of the main magnetic flux pathway is changed. The magnetic resistances of the main magnetic flux pathway and the bypass magnetic flux pathway are composed so that total magnetic flux amount from the field magnet is maintained constant, and then a magnetic force preventing the relative displacement is maintained small. | 01-29-2009 |
| 20090127958 | Anisotropic Bonded Magnet and Direct Current Motor Using the Same - The rectifying characteristic of a brush-equipped direct current machine is improved, and the life of the machine is extended. | 05-21-2009 |
| 20100289364 | Compact motor - In a compact motor | 11-18-2010 |
| 20110210634 | ROTATING ELECTRICAL MACHINE, IN PARTICULAR FOR A MOTOR VEHICLE STARTER - A direct-current rotating electrical machine, in particular for a motor vehicle starter. The machine includes a stator comprising a magnetized structure with permanent magnetization, extending along a circumference of the stator, a rotor, and a group of brushes arranged to allow the electrical supply of the rotor by switching the electrical current in sections of the rotor. The magnetized structure of the machine includes a plurality of main magnets and a plurality of auxiliary magnets, each arranged between two main magnets. The auxiliary magnets have a smaller angular extent and/or radial thickness than the main magnets. The magnetization vector in at least one of the main and auxiliary magnets varies continuously or in steps, at least locally taking a direction other than radial and orthoradial directions. | 09-01-2011 |
| 20110248591 | Anisotropic bonded magnet and direct current motor using the same - An anisotropic bonded magnet molded in a ring shape to be used to excite a brush-equipped direct current motor. A magnetic flux density distribution in each of magnetic pole sections of the ring shape forms an asymmetric distribution which includes a magnetic flux density reduced portion wherein the absolute value rises from a neutral axis opposite to a rotation direction of an armature with a delay with respect to a rotation direction of the armature, and in which the absolute value falls more rapidly than a rise thereof in the rotation direction of the armature with respect to a neutral axis in the rotation direction of the armature. | 10-13-2011 |
| 20120025653 | AGGREGATE MAGNETIZATION SKEW IN A PERMANENT MAGNET ASSEMBLY - A permanent magnet for use in an electro-dynamic machine. The permanent magnet has a longitudinal axis and a plurality of ferromagnetic ring members arranged in a co-axial stack. Each ring member has a plurality of arcuate magnetic poles arranged around a circumference of the ring members. The ring members are magnetized such that a pole boundary between each pair of magnetic poles is skewed at an angle Φ, where Φ is non-parallel to the longitudinal axis. | 02-02-2012 |
| 20120299427 | PERMANENT MAGNET MOTOR - A permanent magnet motor has a rotor and a stator. The rotor has a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a magnetically conductive round housing, permanent magnets fixed to an inner surface of the housing, and brushes for making sliding contact with the commutator. The ratio of an outer diameter of the rotor core to an outer diameter of the housing is between 66% to 84%. | 11-29-2012 |
| 20130241335 | ELECTRIC MACHINE WITH PERMANENTLY EXCITED ARMATURE AND ASSOCIATED PERMANENTLY EXCITED ARMATURE - An electric machine includes a stator and an armature which together bound an air gap via which the stator interacts with a magnetic field of a magnetically active part of the armature. The armature includes as the magnetically active part permanent magnets and magnetically soft flux conducting elements which are arranged between the permanent magnets. The magnetically active part of the armature is in at least one direction of extent longer than a magnetically soft flux conducting device of a magnetically active part of the stator in the direction of extent. | 09-19-2013 |
| 20140125179 | ROTOR FOR MAGNETIC MOTOR - Rotor formed by groups of materials ( | 05-08-2014 |
| 20160094096 | Brushed Electric Motor/Generator - Disclosed are various embodiments for an improved generator/motor and a method of generating current, the method comprising providing a circular rotation path, generating a concentrated magnetic field around a portion of the circular rotation path; rotating a coil along the circular path and through the concentrated magnetic field; generating current within the coil as a result of the rotating, and extracting the current from the coil. | 03-31-2016 |
| 310154290 | Specific position or shape | 7 |
| 20090189470 | Flux-Focused Shaped Permanent Magnet, Magnetic Unit Having the Magnets, Device Having the Magnetic Units and Method for Asymmetrically Focusing Flux Fields of Permanent Magnets - 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. | 07-30-2009 |
| 20100176677 | ELECTRIC ROTATING MACHINE WITH SALIENT POLES - 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. | 07-15-2010 |
| 20100270886 | MOTOR - 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 α with respect to the respective geometric centerlines. | 10-28-2010 |
| 20110227439 | ELECTRIC MACHINE - 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. | 09-22-2011 |
| 20140252900 | DC Homopolar Generator with Drum Wound Air Coil Cage and Radial Flux Focusing - 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. | 09-11-2014 |
| 20150054372 | ELECTRIC MACHINE HAVING ASYMMETRIC MAGNETIC POLE SHAPE FOR TORQUE RIPPLE REDUCTION - 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. | 02-26-2015 |
| 20160094093 | SUPERCONDUCTIVE ELECTRIC MOTOR AND GENERATOR - A non-traditional topology of a superconductive electric motor or generator increases the air gap flux density by reducing stray flux and concentrating lines of flux within the air gap. An electric motor or generator utilizing the invention will include three components: a rotating armature, a permanent magnet stator and a shielding sleeve. The shielding sleeve of the motor is a hollow cylinder that fits between the armature and the stator, and is configured to cool a plurality of high-temperature superconductors within it to a temperature below their critical temperatures. These superconductors are placed at an optimized position to redirect flux and promote greater efficiency. | 03-31-2016 |
