Class 310/154.29 - Specific position or shape

Subclass of Class 310 - Electrical generator or motor structure
Definition: Subject matter including a specific magnetization pattern
No. of patents: 28
Last issue date: 04/12/2011

Number	Title	Issue Date
7923877	Direct current motor with permanent magnet stator 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 tha...	04/12/2011
7235909	Electromagnetic motor/generator 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...	06/26/2007
7015604	Stepping motor and method of manufacturing stepping motor A stepping motor includes: a rotary shaft; a rotor magnet mounted fixedly on the rotary shaft; a bearing member including a smaller-diameter portion and a larger-diameter portion, and supporting the rotary shaft; and a yoke including a plurality of magnetic pole tee...	03/21/2006
6995488	Permanent magnet field small DC motor A permanent magnet field small DC motor includes an arc-shaped rare earth magnet of maximum thickness 1 mm or less fabricated by compression molding from rare earth iron based melt-spun flakes and a binder. The magnet is provided with a certain specific portion at b...	02/07/2006
6954019	Apparatus and process for generating energy 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. ...	10/11/2005
6903475	Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by i...	06/07/2005
6891296	Magnetizing structure of motor The present invention provides a structure for magnetizing a rotor magnet of a motor, which includes a rotor having a magnet cylinder with a wavy curve surface and a stator having a plurality of silicon steel sheets wound by a plurality of winding coils. The present...	05/10/2005
6870290	Direct current motor using magnets with extensions 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 th...	03/22/2005
6724114	Doubly salient machine with angled permanent magnets in stator teeth 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 ma...	04/20/2004
6720697	Direct-current motor 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 f...	04/13/2004
6708388	Method of making a permanent magnet field-type compact DC motor 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...	03/23/2004
6707209	Reduced cogging torque permanent magnet electric machine with rotor having offset sections 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 th...	03/16/2004
6628030	Direct current motor using magnets with extensions 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 extend...	09/30/2003
6611078	Flux diode motor 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 permane...	08/26/2003
5659215	Small form factor actuator for improved functionality and linearity A voice coil motor (VCM) for a small form factor hard disk drive having a contoured flux field in the air gap wherein adjoining regions of oppositely directed magnetic flux form a transition zone. In the preferred embodiment, the magnetic structure assemb...	08/19/1997
5631093	Magnetically coded device Nonmagnetized permanent magnet material is heated in a pattern by a laser beam to a localized temperature above the Curie point or a temperature sufficient to reduce the coercivity sufficiently for an external field to magnetize the pattern in the directi...	05/20/1997
5585680	Electromagnetic stepper motor An electromagnetic stepper motor has a drum-type rotor rotatable about an axis and provided with a plurality of permanent magnets distributed over its circumference, a stator surrounding the rotor and comprising a plurality of permanent magnets and an ele...	12/17/1996
5459362	Small form factor actuator for improved functionality and linearity A voice coil motor (VCM) for a small form factor hard disk drive having a contoured flux field in the air gap wherein adjoining regions of oppositely directed magnetic flux form a transition zone. In the preferred embodiment, the magnetic structure assemb...	10/17/1995
5349258	Permanent magnet structure for use in electric machinery Magnetic circuit losses due to unnecessary magnetic fields are greatly curtailed or eliminated relative to the permanent magnet structures of electric machinery, without employing a conventional shunt or pole pieces. At least one coaxial cylinder of magne...	09/20/1994
5329267	Magnet assembly and a voice coil motor using such magnet assembly Magnet assemblies for installation into a voice coil motor is described. A pair of magnetic pieces are molded into circular arc shapes of different radii and positioned concentrically across a gap. The ends of such the pair of magnet pieces, are joined to...	07/12/1994
5105113	Permanent-magnetic motor having anti-cogging structure A permanent-magnetic motor employs a skew structure in an armature iron core and an equal gap structure. A center line of a permanent magnet field pole is disposed to be shifted against a mechanical center line of the motor or a center line of the iron co...	04/14/1992
4994702	Motor A motor includes a field magnet system comprised of plural permanent magnetic poles arranged in a circle and an armature with plural poles each facing the magnetic poles of the field magnetic system. The widthwise length of a magnetic flux generating area...	02/19/1991
4945330	Actuator An actuator is disclosed, in which an movable armature and a permanent magnet mounted on a stationary yoke are disposed to face each other with a small gap. The armature has at least one pair of protruding poles which are movable along a predetermined pat...	07/31/1990
4935655	Direct-current machine comprising a permanent-magnetic stator In a direct-current machine comprising a permanent-magnetic stator, the detent torque or resting moment of the rotor is to be reduced by simple and low-cost technical means. This is achieved by disposing the permanent-magnet shells of the stator asymmetri...	06/19/1990
4727273	Permanent magnet type electric motor A permanent magnet type electric motor including a cylindrical yoke, a plurality of magnetic poles arranged peripherally on an inner surface of the yoke and an armature arranged rotatably in a region surrounded by the magnetic poles is featured by the mag...	02/23/1988
4571528	Electromagnetic rotary motor An electromagnetic rotary motor including a stator means, a rotor means and an electronic control means for inducing an electromagnetic field. The stator means includes a permanent magnet means having pole faces that define a gap between them with a gener...	02/18/1986
4467232	Direct-current machine A DC machine (motor, etc.) with permanent field magnets arranged in the stator frame and designed as shells. The shell of each pole structure consists of two or more annular segments arranged one behind the other in the axial direction and staggered with ...	08/21/1984
4052630	Synchronous micromotor A synchronous micromotor having a central rotor shaft coaxially surrounded by a permanent magnet structure including a plurality of north poles and a plurality of south poles which circumferentially alternate with the north poles, all of these poles being...	10/04/1977

PatentStorm

Bizarre Patents

PatentStorm News

Class 310/154.29 - Specific position or shape