Matches 1 - 34 out of 34


Match Document Document Title
9006941 Permanent magnet motor having teeth with fingers  
A permanent magnet-type stepping motor broadly includes: a movable member (e.g., a rotor) having a number of magnetic poles on a surface thereof, with adjacent poles being of opposite polarity,...
8957554 Stepping motor with position regulation member  
A stepping motor includes a stator, a rotor which is rotatable to the stator, a rotor-side position regulation part which is fixed to the rotor and is rotated together with the rotor, and a...
8896164 Permanent-magnet stepping motor  
A stepping motor uses a low-cost ferrite magnet instead of an expensive rare-earth magnet. The stepping motor has characteristics equivalent or superior to those of a conventional stepping motor....
8729994 Rotary solenoid  
The invention refers to a Rotary Solenoid comprising a stator and rotor that can rotate around a rotational axis. The rotor has a rotor shaft on which a rotor disc is arranged. The rotor disc is,...
8536757 Three-phase brushless DC motor  
An object of the present invention is to provide a three-phase brushless DC motor providing a high torque and performs stable operations which can be used even when an installation space is...
8174155 Stepping motor with a coded pole pattern  
The present invention relates to a stepping motor with a magnet pole pattern having a predetermined pattern around the circumference of the stepping motor. In one embodiment, the pattern relates...
8131413 Electric motor and conversion system for manually powered vehicles  
An electric motor and conversion system includes a direct current power source, a rotor with two sides and two series of permanent magnets alternating in polarity, two stators on opposing sides of...
7511391 Electromagnetic actuator  
An electromagnetic actuator has a rotor and a stator around which coils are wound to face portions of an outer surface of the rotor. The stator is C-shaped, the rotor is arranged so that a...
7508108 AC motor  
A brushless AC motor has a rotor, N stator pole group, and plural loop-configuration stator windings. The rotor has magnetic poles with alternating N poles and S poles circumferentially disposed...
7459813 Magnet rotor and electromagnetically-driving device using the same, and optical apparatus with light quantity-control device  
An electromagnetic device includes a magnet rotor having a rotary shaft and a stator having an excitation coil configured to apply a rotation force to the rotor. The magnet rotor includes a hollow...
7446443 Electromagnetic-driving device and light quantity-control device incorporating the same  
An electromagnetically-driving device has a rotor with a hollow, cylindrical permanent magnet; an inside yoke on an internal circumference side of the rotor; an outside yoke on an external...
7385320 Step motor  
A step motor includes a rotor having four magnetic poles, a first magnetic pole magnetically excited by a first coil, a second magnetic pole magnetically excited by a second coil, and a third...
7372179 Stepper motor having solenoid coils around end portions of stator poles  
A stepper motor includes a rotor having a ring-shaped body having a circumference along which a plurality of magnetic poles of alternates. A plurality of stator members is arranged along and...
7358629 Electromagnetic actuator  
The rotational torque of an electromagnetic actuator having a stator and rotor, such as a stepping motor, is increased. The electromagnetic actuator includes a rotor (30) having multiple magnetic...
6798093 Dual coil permanent magnet motor having inner annular member  
A motor includes a cylindrical magnet, first outer magnetic pole portions which are formed by gapping part of a cylinder from the distal end in the axial direction of the motor, and which oppose...
6222287 Motor  
A motor includes a first stator yoke which is excitable by energization into a first coil, a second stator yoke which is excitable by energization into a second coil, and a rotor which can be...
5708310 Permanent magnet type stepping motor  
A permanent magnet type stepping motor wherein and that at least one pitch formed by two adjacent small pole teeth of each of stator magnetic poles is different from other pitch formed by other...
5532531 Permanent magnet type brushless motor  
A permanent magnet type brushless motor wherein the number of a stator magnetic poles is 3 m (where m is an integer not less than 2), Z pieces of N pole and Z pieces of S pole (where Z is m...
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...
5334894 Rotary pulse motor  
In a rotary pulse motor including: a cylindrical stator made of magnetic material; a cylindrical rotor made of magnetic material and inserted concentrically into the cylindrical stator and being...
5289064 Three-phase permanent magnet stepping motor  
An inner- or outer-rotor type three-phase permanent magnet stepping motor constituted by a stator having circumferentially equidistantly arranged three magnetic poles each having small teeth equal...
4803389 Stepping motor, method of driving the same and drive circuit therefor  
A stepping motor includes a first element including at least two permanent magnets each having a pair of N and S poles and a second element including a yoke arranged to be separated from the first...
4757220 Electrodynamic vernier machine  
It comprises a stator (61) fitted with a polyphase winding (63) having 2p poles and comprising n teeth (75) per pair of poles, and a rotor provided with 2(n+1) magnets (65) per pair of poles,...
4700098 D.C. motors with unequal pole spacing  
A rotary electric apparatus comprising a field magnet having different magnetic poles arranged alternately on a circumferential surface, an armature including an armature core having slots formed...
4700091 Bipolar stepping motor rotor with drive pinion and method of manufacture  
A wristwatch movement has a Lavet stepping motor directly driving a toothed center wheel by means of a drive pinion which is an integral part of the stepping motor rotor. The rotor comprises a...
4642494 Means to improve performance of electric motors  
An electric motor having a rotor and a stator with two sets of stator poles. The poles of one set of stator poles are disposed in positions about the stator which they would normally occupy if all...
4518883 Electric motor with permanent magnet rotor  
The motor according to the invention comprises a disc-shaped rotor with multipolar permanent magnetization along an annular area and a stator comprising a plurality of magnetic circuits (9, 10, ....
4456858 Permanent magnetic A.C.-D.C. motor  
Disclosed is a rotary machine powered by magnetic fields and comprises at least one fixed and at least one movable permanent magnetic member which have a curvilinear surface adapted to provide...
4424463 Apparatus for minimizing magnetic cogging in an electrical machine  
An apparatus which reduces magnetic cogging between a rotor and stator of an electrical motor or generator. The stator is divided into pairs of angular pie-shaped segments, one member of each pair...
4396846 Stepping motor with rotor-positioning magnet  
A ring (16) of non-magnetic material is engaged in the opening bounded by the pole shoes (6,7) of a pole plate (5), between the pole shoes and the rotor (12).A magnet (18) serving to define the...
4315171 Step motors  
Improved step motors for providing linear and angular step-wise motion. In certain embodiments the motors utilize a permanent magnet rotor having a multiplicity of equal pitch (equally spaced)...
4103191 Step motor  
A step motor having a rotor adapted to rotate a full revolution in response to each pulse applied to the stator is provided. Positioning magnets are provided for positioning a rotor in a rest...
4031419 Self-starting synchronous and stepping motor having a permanent magnet rotor  
A self-starting synchronous or stepping motor has at least two phases, a permanent magnet rotor and a stator including individually excited and inwardly facing main stator poles. The stator poles...
3760207 STEPPING MOTOR STRUCTURE  
A dynamoelectric machine having a stator enclosed in a rotor, the stator including spider-like projections each having teeth which coact with teeth on the interior of the rotor. The operating...

Matches 1 - 34 out of 34