The respective magnets of each of a plurality of spaced Halbach magnet arrays in both the X and Y directions that incorporate in the arrays in both directions, the magnets having a field oriented parallel to the Z axis in alternately the positive and negative directions. The magnets in each array in each direction that are not shared by the crossing Halbach magnet arrays each has a horizontal field orientation parallel to either the X or the Y axis with the filed direction in each instance point...

An electric machine in accordance with the invention includes a stator core having first and second ends and having windings therein with end turns of the windings protruding from the first and second ends of the stator core. A rotor is rotatably positioned within the stator core. First and second laminated aluminum ring assemblies are positioned against the first and second ends, respectively, of the stator core in contact with the housing. Thermally conductive potting material is positioned be...

A stator assembly comprises upper and lower pole plates or silicon steel sheets each having a plurality of radial poles. Each radial pole includes a magnetic pole face extending along a direction parallel to a longitudinal direction. The magnetic pole faces of each upper pole plate, each lower pole plate, or each silicon steel sheet may be of the same or different length. Alternatively, the magnetic pole faces may be overlapped with each other or not overlapped with each other. The overall magne...

This spindle motor has a base plate, a stator mounted on the base plate, a bearing provided on the base plate, a rotating shaft rotatably provided on the bearing, and a rotor fixed to the rotating shaft. The rotor is formed of a metallic magnetic substance and resin and is fixed to the rotating shaft at the magnetic substance, and a field magnet fixed to the rotor. The field magnet is pressed into and fixed to the rotor at a resin section of the rotor.

Vibrating linear actuator and method of operating same. The actuator of the invention includes a stator, a spring vibration system having a moving portion with a magnet and further having a spring configured to support the moving portion. The actuator further includes an electromagnetic coil configured to receive an electrical current, whereupon the coil moves the moving portion against a load supplied by the spring to reciprocally move the moving portion, a frequency detector configured to dete...

An electromagnetic actuator has a stator core, an armature and a coil. The stator core is formed as a seamless cylindrical tube having a thin wall as a magnetic restrictor. The thin wall has a thickness sufficient to maintain a mechanical strength of the stator core. A permanent magnet is located on an outside of the thin wall to generate a magnetic flux passing through the thin wall in the same direction as a magnetic flux generated by the coil. The thin wall is magnetically saturated with the ...

To facilitate the fabrication work of a stator column assembly and improve full and wise use of resources, as well as to prevent contact accident between a mold portion of a stator column and a rotor shaft due to the thermal inflation. A first electromagnet unit (30), a stator coil unit (20), and a second electromagnet unit (40) are engaged to and arranged in a cylindrical stator column (11) in the order stated, the first electromagnet unit (30) comprising an electromagnet (31) of a first active...

An alternator includes a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, a stator having a stator core disposed facing the rotor and a polyphase stator winding installed in the stator core, and a bracket supporting the rotor and the stator, wherein the stator core comprises a laminated iron core formed with a number of slots extending axially at a predetermined pitch in a circumferential direction, the polyphase stator winding comprises a number ...

A stator comprises a stator frame, a plurality of key bars connected to the stator frame and a stator core. Each of the key bars has a dovetail. The stator core is formed by a pre-packaged stator core section including laminations each having a dovetail slot for engaging a respective dovetail. The stator core also includes a manually stacked stator core section including manually stacked laminations each having a dovetail slot for engaging respective dovetails. The cross-sectional area of the do...

The invention relates to a travelling wave machine which includes a stator and a rotor, wherein at least one stator coil and/or one rotor coil is arranged in at least one groove of the stator or the rotor, respectively, and wherein the stator coil or the rotor coil, respectively, projects from the groove at both sides in a longitudinal direction under the formation of a coil head, characterized in that the cross section of the stator coil or of the rotor coil, respectively, in the area of the re...