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| Number | Title | Issue Date |
| 8179012 | Electro-mechanical transducer of small dimensions, in particular a timepiece generator The electromechanical transducer (2) includes a rotor (4) and two coil (6, 8), the rotor being formed of first, second and third parts (10, 11, 12) made of magnetic material with respectively first, second and third superposed central zon... | 05/15/2012 |
| 8097994 | Cooling structure for a vehicle AC generator There is provided a vehicle AC generator in which the contact face of at least one of a pair of cases that make contact with the respective axis-direction end faces of a stator core is provided with a cooling air path that connects the outer circumferential surface ... | 01/17/2012 |
| 7923880 | Stepping motor A single phase stepping motor has a stator, and a rotor disposed to surround the stator. The stator includes first and second annular stator yokes, which are disposed opposite to each other and have a plurality of pole teeth formed along a circumference thereof, and... | 04/12/2011 |
| 7847463 | Alternating-current dynamoelectric machine A projected shape of permanent magnets is contained within a plane of projection formed by adjacent claw-shaped magnetic poles overlapping when the claw-shaped magnetic poles are viewed in a direction of rotation of a rotor, and is generally similar in shape to a sh... | 12/07/2010 |
| 7339294 | Vehicular starting and charging rotary electric machine A vehicular starting and charging rotary electric machine includes a rotor, a stator, brackets, a brush, and a rotation detection sensor. The rotor has a field winding. The stator has a stator winding. The brackets supports the rotor and the stator. One end of the b... | 03/04/2008 |
| 7288865 | Bicycle generator hub A bicycle generator hub is mounted to the front fork of a bicycle and includes a hub shaft, a hub shell, bearings, a generator mechanism and first and second magnetic flux recirculation members. The hub shaft is non-rotatably mounted to the front fork. The hub shell... | 10/30/2007 |
| 7227290 | Rotor core and direct-current motor A core includes a ring body and a plurality of teeth. The teeth extend radially outward form the outer circumference of the ring body. The core is formed by assembling a first core member and a second core member. Each core member has part of the teeth the number of... | 06/05/2007 |
| 7135947 | Hybrid microwave T-switch actuator A hybrid switch actuator having six positions that are stable in the absence of current and in which displacement occurs between an initial position and a target position under the action of a current. The actuator includes a stator and a rotationally moveable rotor... | 11/14/2006 |
| 7105978 | Rotor of electric rotating machine Leakage of a magnetic flux from inside diameter face of claw magnetic poles is reduced to improve output, and deformation and vibration of the claw magnetic poles are reduced. A rotor includes: a rotor coil for generating magnetic flux; a pole core comprised of a fi... | 09/12/2006 |
| 7095154 | Generator motor for vehicles It is an object of the invention to obtain a generator motor for vehicles that can increase generated power or generated torque by a special positioning of permanent magnets in gaps between predetermined claw magnetic poles. The invention provides a generator motor ... | 08/22/2006 |
| 7064466 | Brushless rotary electric machine having tandem rotary cores A brushless rotary electric machine includes a stator having an annular armature core with first radial teeth at the outer periphery thereof and second radial teeth at the inner periphery thereof and an armature winding wound between the teeth, a rotor having a pair... | 06/20/2006 |
| 7038336 | Construction of power assisting synchronous motor An improved synchronous electric motor incorporating a stator and large current terminal unit made into a single unit with solidified molding resin thus a separate casing is unnecessary and thus the constitution is simplified. The large current terminal unit and a m... | 05/02/2006 |
| 7023121 | Brushless rotary electric machine having tandem rotary cores A brushless rotary electric machine includes a stator having an annular armature core with first radial teeth at the outer periphery thereof and second radial teeth at the inner periphery thereof and an armature winding wound between the teeth, a rotor having a pair... | 04/04/2006 |
| 6998757 | Multi-rotor synchronous machine permitting relative movement between rotors A compact and reliable structure of a multi-rotor synchronous machine which may be employed as a generator/motor for automotive vehicles is provided. The machine includes an outer rotor having permanent magnets, an inner rotor having permanent magnets disposed to be... | 02/14/2006 |
| 6969937 | Multiple, permanent-magnet rotor for a rotating electrical machine, and a method for producing same In order to allow a rotating electrical machine, which uses a permanent-magnet rotor with a flux-concentration construction for a rated power of more than 100 kW, to be assembled as easily as possible, two mutually adjacent half-yokes of two poles as well as magnets... | 11/29/2005 |
| 6960858 | Motor using permanent magnet A motor which uses a permanent magnet is provided in which output thrust is improved by increasing a magnetic saturation limit and preventing reduction in magnetic flux and generation of heat is reduced by inhibiting generation of an eddy current in a magnetic pole.... | 11/01/2005 |
| 6936946 | Rotor of electric rotating machine Leakage of a magnetic flux from inside diameter face of claw magnetic poles is reduced to improve output, and deformation and vibration of the claw magnetic poles are reduced. A rotor includes: a rotor coil for generating magnetic flux; a pole core comprised ... | 08/30/2005 |
| 6924580 | Vehicle alternator and its rotor The rotor of a vehicle alternator can firmly fasten the permanent magnets between claw-shaped magnetic poles. The rotor includes a Lundell type iron core having claw-shaped magnetic poles which are alternately arranged and opposed each other and include a centered c... | 08/02/2005 |
| 6891295 | Flywheel magneto generator A flywheel magneto generator which comprises a rotor having a magnet attached to an outer circumferential side of a flywheel and a stator constructed by winding a generating coil around a core having a magnetic pole portion opposed to a magnetic pole of the rotor, w... | 05/10/2005 |
| 6882081 | Rotor for rotary electric rotor A cylindrical magnetic pole portion of a rotor core is constituted by first and second cylindrical magnetic pole sub-portions prepared as solid bodies. First and second magnetic poles are formed on the first and second cylindrical magnetic pole portions so as to be ... | 04/19/2005 |
| 6853111 | Electric-machine-rotor having field coil and auxiliary permanent magnets amd method of manufacturing the same An electric-machine rotor is composed of a field coil, a pair of pole cores having a plurality of claw poles to enclose the field coil, a plurality of auxiliary permanent magnets disposed between the claw poles, a shaft fixed to the pair of pole cores, and a pair of... | 02/08/2005 |
| 6794790 | Rotary electric machine 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 rot... | 09/21/2004 |
| 6774512 | Claw-pole permanent-magnet stepping motor A claw-pole permanent-magnet stepping motor includes a pair of cases containing two or more inductors in symmetrical arrangement with multiple claw poles. The case unit has an oval shape having thin flat side walls or thin stepped side walls and connecting thick arc... | 08/10/2004 |
| 6724116 | Alternator permanent magnet rotor design A rotor assembly for an alternator includes an electrical wire defining an excitation winding. A first pole piece and a second pole piece each have a generally circular body defining an axis of rotation and an outer radial periphery. A plurality of pole fingers are ... | 04/20/2004 |
| 6700296 | AC generator for vehicle An object of the present invention is to provide an automotive alternator achieving high output by overlapping a laminated core of a stator and yoke portion of a field rotor in an axial direction, and enabling electromagnetic noise to be reduced by prescr... | 03/02/2004 |
| 6621190 | Rotor for an automotive alternator A rotor for an automotive alternator comprises a cylindrical bobbin fitted over the base portions of a pair of field cores having a cylindrical portion and a pair of first and second annular flange portions projecting perpendicularly from both ends of the... | 09/16/2003 |
| 6608424 | Rotary electric machine having annular rotor core with slits In an alternating current generator, a rotor is provided radially inside a stator core. A rotor core has a cylindrical boss press-fit around a rotor shaft, disc portions extending from an outer periphery of the boss in a radial direction, and claw pieces ... | 08/19/2003 |
| 6455978 | Hybrid twin coil electrical machine A hybrid electrical machine having a permanent magnetic rotor field in addition to an electrically excited rotor field is disclosed. The generator rotor (220) has two opposing claw segments (226, 228) mounted at opposite ends of a rotor shaft (222). A thi... | 09/24/2002 |
| 6448680 | Rotating electric machine with permanent magnets and magnetic resistance with improved flux weakening properties The invention concerns a rotating electric machine which includes a stator equipped with armature coils and a rotor mounted rotating inside the stator. The rotor having a series of magnets with alternating polarities juxtaposed with magnetic parts having ... | 09/10/2002 |
| 6437477 | Hybrid electrical machine with axial flux magnet A hybrid electrical machine having a permanent magnetic rotor field in addition to an electrically excited rotor field is disclosed. The generator rotor (320) has a first claw segment (326) and a second claw segment (328) mounted at opposite ends of a rot... | 08/20/2002 |
| 6396181 | Rotating maching with advanced excitation means A rotary electrical machine, comprising a stator (100) having at least one armature winding (140) mounted in slots which define stator poles, and a rotor (200) mounted for rotation inside the stator, the rotor having at its outer periphery magnetic poles ... | 05/28/2002 |
| 6369485 | Rotor structure A rotor structure comprising magnets for suppressing the leakage of a magnetic flux between the side faces of the adjacent claw-like magnetic poles and metal holding members each of which covers the magnets together with the claw-like magnetic pole and ra... | 04/09/2002 |
| 6362550 | Electric machine, especially a three-phase generator, with an exciter The electric machine, particularly a three-phase generator, has an exciter machine (26) in the form of a claw pole machine which supplies the exciter current necessary for the generator. The exciter machine is located to the side of the generator and has ... | 03/26/2002 |
| 6359366 | Hybrid permanent magnet/synchronous machines A rotor 33, 133 for use in an electrical machine 100 having permanent magnets 34, 134 included therein, each permanent magnet 34, 134 between an adjacent pair of poles 32, 132, wherein each adjacent pole 32, 132 has an opposite polarity. Each permanent ma... | 03/19/2002 |
| 6333582 | Rotor for an alternator A rotor has plural reinforcing bodies each approximately formed in a U-shape having wing portions arranged in both side portions of an attaching portion of a flat plate shape, and disposed such that the attaching portion faces to each of inner circumferen... | 12/25/2001 |
| 5955807 | Synchronous electric machine having auxiliary permanent magnet A synchronous electric machine includes a stator having an armature winding, a rotor having axially laminated magnetic sheets and a field coil, a plurality of permanent magnets disposed in the rotor to form N-pole and S-pole on the outer circumference of ... | 09/21/1999 |
| 5874795 | Multi-phase permanent-magnet type electric rotating machine A multi-phase permanent-magnet type electric rotating machine comprising: a permanent magnet type rotor, the permanent magnet type rotor including pairs of magnetic bodies magnetized by an axially magnetized cylindrical permanent magnet and disposed so as... | 02/23/1999 |
| 5747913 | Rotor for hybrid generator having improved magnet retention A hybrid alternator has a rotor with a plurality of permanent magnets disposed between opposing claw-pole segment pole fingers. The magnets are radially retained by the pole fingers during rotation. The magnets are supported during high speed rotation cha... | 05/05/1998 |
| 5483116 | Rotor for a rotating electric machine The present invention prevents the degradation of the power generating efficiency of an alternating current generator by preventing the expansion of an air gap formed between pole cores and a stator core, achieves low-noise operation by preventing generat... | 01/09/1996 |
| 5386161 | Permanent magnet stepping motor The invention relates to a structure of a three-phase permanent magnet stepping motor in which vibration and noise can be reduced and lowering of its output can suppressed even in a high-pulse region. To this end, the motor has a three-phase, six-pole, pe... | 01/31/1995 |
