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| Number | Title | Issue Date |
| 8183731 | Electro-motive machine using Halbach array and electrons trapped in electromagnetic providing current A Halbach array is radially disposed in an environment optimized for efficiency and controlled for efficient generation and use of power in order to generate, establish, and maintain a desired level of rotational energy with enhanced efficiency. ... | 05/22/2012 |
| 8183732 | Radial anisotropic magnet manufacturing method, permanent magnet motor using radial anisotropic magnet, and iron core-equipped permanent magnet motor To improve tranquility and controllability of an iron core-equipped permanent magnet motor with an improved maximum energy product (BH)max by improving shape compatibility of a radial anisotropic magnet, there is provided a radial anisotropic magnet manuf... | 05/22/2012 |
| 8072109 | Radial anisotropic magnet manufacturing method, permanent magnet motor using radial anisotropic magnet, and iron core-equipped permanent magnet motor To improve tranquility and controllability of an iron core-equipped permanent magnet motor with an improved maximum energy product (BH)max by improving shape compatibility of a radial anisotropic magnet, there is provided a radial anisotropic magnet manuf... | 12/06/2011 |
| 8044548 | Permanent-magnet-type rotating electrical machine An object of the present invention is to provide a permanent-magnet-type rotating electrical machine capable of realizing a variable-speed operation at high output in a wide range from low speed to high speed and improving efficiency and reliability. The permanent-m... | 10/25/2011 |
| 8044547 | Radial-direction gap type magnet motor In a radial-direction gap type magnet motor, when an energy density increases, a direction change Mθ/φp of a static magnetic field with respect to a mechanic angle between different poles increases in an exponential manner and thus to decrease a cogging torque of ... | 10/25/2011 |
| 8035266 | Axial gap motor An axial gap motor includes: a rotor; and a stator, wherein: the rotor includes a plurality of main permanent magnet parts and a plurality of auxiliary permanent magnet parts, the auxiliary permanent magnet parts being disposed near an end portion of each of the mai... | 10/11/2011 |
| 7990011 | Rotor for electric motor A rotor for an electric motor (10) includes a magnetic assembly (12) formed into a ring-shaped plate form, a rotor disc (11) for holding an inner periphery of the magnet assembly, and an outer peripheral ring (13) for holding an outer per... | 08/02/2011 |
| 7986069 | Brushless electric machine A first member (40a) has a magnet assembly (20) that includes a plurality of permanent magnets (10) held with their homopoles contacting one another. A second member (50a) includes magnet coils (30), and is designed t... | 07/26/2011 |
| 7965010 | Linear motor with patterned magnet arrays An armature for a linear motor is described. The armature includes a first of a pair of magnetic structures comprising a first plurality of maglettes each having a magnetic polarity vector; an angle between two adjacent magnetic polarity vectors in the first plurali... | 06/21/2011 |
| 7948135 | Radial anisotropic sintered magnet and its production method, magnet rotor using sintered magnet, and motor using magnet rotor A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or ... | 05/24/2011 |
| 7911103 | Rotary electrical machine including pole pieces and permanent magnets The present invention relates to a rotary electrical machine comprising: at least one stator; and at least one rotor; the rotor having an axis of rotation and co-operating with the stator to define... | 03/22/2011 |
| 7906881 | Motor It is desired to design a coreless motor in which a gap size is set to be as small as possible, and a magnet having a large energy product is used in order to increase the gap magnetic flux density since the coreless motor has no iron core so that the magnetic flux ... | 03/15/2011 |
| 7902707 | Anisotropic permanent magnet motor An anisotropic permanent magnet motor includes a stator and a rotor opposed to teeth of the stator with a gap therebetween, and the rotor includes an anisotropic permanent magnet disposed on a surface of a rotor yoke. The anisotropic permanent magnet has an orientat... | 03/08/2011 |
| 7902708 | Electro-magnetic motor generator system An electro-magnetic motor-generator system, including a wheel assembly having a wheel mounted onto a shaft. The shaft has a sleeve mounted thereon. A frame assembly is mounted onto the sleeve. The frame assembly comprises at least one hub having a sprocket. A gear a... | 03/08/2011 |
| 7880357 | Sintered magnet and rotating machine equipped with the same A sintered magnet and a rotating machine equipped therewith are disclosed, which include: crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or an oxyfluoride compound, containing at least one element selected from the grou... | 02/01/2011 |
| 7880356 | Brushless electric machine A first member (40a) has a magnet assembly (20) that includes a plurality of permanent magnets (10) held with their homopoles contacting one another. A second member (50a) includes magnet coils (30), and is designed t... | 02/01/2011 |
| 7847460 | Yoke-integrated bonded magnet and magnet rotator for motor using the same This invention provides a soft magnetic yoke-integrated bonded magnet in which a soft magnetic yoke has been integrally compression molded in such a state that the soft magnetic yoke is engaged in a joined face formed by bringing a binding material-containing magnet... | 12/07/2010 |
| 7839044 | Rotor magnet, spindle motor comprising the same, recording and reproducing apparatus, and jig for manufacturing the same An object of the present invention is to provide a rotor magnet that is capable of adjusting attraction of magnet that is mounted in a spindle motor, a spindle motor including the same, a recording and reproducing apparatus, and a jig for manufacturing the same, wit... | 11/23/2010 |
| 7692349 | Direct drive motor for washing machine and method of manufacturing the same A direct drive motor for a washing machine and a method of manufacturing the same are provided. The motor may include a stator having a winding part with a coil wound thereon, a rotor frame including a side wall part and a rear wall part, the rotor frame being conne... | 04/06/2010 |
| 7626300 | Radial anisotropic cylindrical sintered magnet and permanent magnet motor In a radially anisotropic sintered magnet of annular shape, the remanence in a radial direction of the annulus increases and decreases at intervals of 90° in a circumferential direction of the annulus, and the remanence in a radial direction over the entire circumf... | 12/01/2009 |
| 7598646 | Electric motor with Halbach arrays Electric motor configurations are provided with Halbach arrays. In one example, an electric motor includes a first plurality of magnets arranged in a first Halbach array. The first plurality of magnets is configured to provide a first magnetic field that substantial... | 10/06/2009 |
| 7560841 | Thin hybrid magnetization type ring magnet, yoke-equipped thin hybrid magnetization type ring magnet, and brush-less motor The present invention provides miniaturization of brushless motors and brush motors used in electric devices, a ring magnet which simultaneously achieves both high torque and a reduction in cogging torque, a ring magnet with yoke, and a brushless motor. The thin hyb... | 07/14/2009 |
| 7443061 | Driving device A driving device which is capable of delivering higher power and can be reduced in size. A hollow-cylindrical magnet (1) is magnetized so as to have circumferentially alternately different poles. First and second coils (2 and 3) are arranged con... | 10/28/2008 |
| 7443068 | Spindle motor A spindle motor includes a rotor magnet including a plurality of pairs of magnetic poles polarized in a radial direction and arranged along a circumferential direction of the rotor magnet and a rotor hub supporting the rotor magnet and being rotatable around an axis... | 10/28/2008 |
| 7382072 | Generator An efficient and reconfigurable permanent magnet generator that comprises a permanent magnet subassembly and at least one exciter is disclosed. The permanent magnet generator may comprise a mainframe comprising at least one exciter, and a permanent magnet subassembl... | 06/03/2008 |
| 7362002 | Automotive starter generator apparatus An automotive staffer generator apparatus that is inexpensive and compact, enabling engine starting functions and generating functions to be made compatible by improving maximum torque without having to increase the number of turns in an armature winding. An automot... | 04/22/2008 |
| 7355312 | Brushless Motor Small brushless motor having high output and small torque ripple. The brushless motor includes induction voltage adjusting means. With this, induction voltage of each phase of the stator is adjusted into a flatly spread waveform having no abrupt variation where odd-... | 04/08/2008 |
| 7352096 | Electro-motive machine using Halbach array A Halbach array is radially disposed in an environment optimized for efficiency and controlled for efficient generation and use of power in order to generate, establish, and maintain a desired level of rotational energy with enhanced efficiency. ... | 04/01/2008 |
| 7342338 | Permanent magnet electric motor with reduced cogging torque A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle θr in electrical ang... | 03/11/2008 |
| 7327587 | System and method for power conversion An ac-ac power converter system is provided for supplying power to an electrical load. The ac-ac power converter system provides an output voltage having variable amplitude and/or frequency. The ac-ac power converter system includes a boost inductor for applying a d... | 02/05/2008 |
| 7327062 | Rotor for rotary electric machine A rotor (10) for a rotary electric machine (1) comprises a rotation shaft (11), and a plurality of rotor cores (120-129) fixed to the rotation shaft (11) and axially split. The rotor cores (120-129) have outer ... | 02/05/2008 |
| 7324320 | Device and a method for magnetizing a magnet system A device for magnetizing a magnet system preferably having several pulse-generator circuits which are mutually arranged so that their magnetic fields superimpose in a cumulative manner. Each pulse-generator circuit includes a capacitor element, a magnetization coil ... | 01/29/2008 |
| 7304398 | Spring activated energy transducer generating A/C electricity from natural forces-frictionless magnetic plate A spring activated energy transducer is provided. The energy transducer of the current invention generates alternating current (A/C) electricity from abundant external natural forces. The energy transducer is comprised of an upper part and a lower part. The upper pa... | 12/04/2007 |
| 7282827 | Permanent magnet motor A permanent magnet motor has permanent-magnet-holding slots 5 formed in those parts of a rotor core 2A which correspond to sides of an approximately regular polygon centered on an axis of the rotor core 2A, permanent magnets 4 inserted in... | 10/16/2007 |
| 7268513 | Motor/generator unit A motor/generator unit in which a motor/generator and an invertor part are integrated and the wiring of a field circuit part for supplying current to a winding on a rotor is rationalized. In a motor/generator unit in which a motor/generator body part having a field ... | 09/11/2007 |
| 7265470 | Magnetic spring and actuators with multiple equilibrium positions Arrays of magnets configured to create linear or rotary magnetic springs with multiple equilibrium points. Some of the equilibrium points are stable, while others are unstable. No mechanical contact is required between moving and stationary elements of the magnetic ... | 09/04/2007 |
| 7247964 | Electrical machine with magnetized rotor An electrical machine comprises a stator and a rotor. The rotor is adapted to magnetically interact with the stator to promote rotation of the rotor about an axis. The rotor includes a rotor core and a plurality of magnetized arcs supported by the rotor core. The pl... | 07/24/2007 |
| 7242123 | Actuator, light quantity adjusting apparatus, and stepping motor An actuator maintains high efficiency, can react to an increase in pole, has a high part fit, and can be manufactured at low cost while it is thinned. The actuator includes a magnet which is formed in a ring shape, in which at least one surface perpendicular to a ce... | 07/10/2007 |
| 7233090 | Electric machine, in particular brushless synchronous motor An electrical machine, in particular a brushless synchronous motor has a stator (14) and a rotor (12) with salient poles (18) disposed distributed over its circumference, each of which poles has an enclosed permanent magnet (11) and a pol... | 06/19/2007 |
| 7228616 | System and method for magnetization of permanent magnet rotors in electrical machines A system and method for manufacturing an electrical machine is provided. An array of permanent magnet segments is assembled around a rotor spindle. Desired orientation directions of the permanent magnet segments are determined. The assembled permanent magnet segment... | 06/12/2007 |
