Abstract: The invention relates to a motor with a frequency generator attached thereto, equipped with the frequency generator (FG) for detecting a rotational speed of the motor.

Abstract: The invention relates to a motor with a frequency generator attached thereto, equipped with the frequency generator (FG) for detecting a rotational speed of the motor.

Abstract: A PM-type electric rotating machine comprises a rotation axis, a rotor that rotates together with the rotation axis and a stator that rotatably supports the rotation axis. The rotor has a closed-end-cup-shaped holder that is mounted at one end of the rotation axis and a permanent magnet fixed on an inner surface of a cylindrical portion of the holder. The stator has a housing bush that supports the rotation axis in an axis hole formed through the center of the housing bush, twelve stator cores that are radially mounted around the housing bush to face the outer tip ends thereof to the permanent magnet with an air gap, and coils that are wound around the stator cores via insulators. The inner base portions of the stator cores are connected to one another with pressure so as to form a ring-shaped yoke by mounting the stator cores around the housing bush.

Abstract: A core has an annular inner core portion, a rib-shaped core portion extending radially from the annular inner core portion and an outer peripheral core portion. Magnetic pole tooth portions are formed in an annular shape on the outer periphery of the rib-shaped core portion, and the core is composed of a plurality of core blocks having the same shapes as blocks formed by dividing the core in circumferential direction.

Abstract: In an electric motor comprising a rotor, a stator, a stator core that constitutes the stator, a core section that constitutes the stator core, a plurality of split core blocks which constitute the core section, and a metallic connection housing that connects the split core blocks in dovetailed form to create one connected core section, the split core blocks are each formed of a laminated steel plate, in that the connection housing is formed of a material softer than the laminated steel plate, and the dovetailed connections at the connection housing are plastically deformed to remove the connection gap existing at each of the dovetailed connections.

Abstract: In an electric motor comprising a rotor, a stator, a stator core that constitutes the stator, a core section that constitutes the stator core, a plurality of split core blocks which constitute the core section, and a metallic connection housing that connects the split core blocks in dovetailed form to create one connected core section, the split core blocks are each formed of a laminated steel plate, in that the connection housing is formed of a material softer than the laminated steel plate, and the dovetailed connections at the connection housing are plastically deformed to remove the connection gap existing at each of the dovetailed connections.

Abstract: A PM-type electric rotating machine comprises a rotation axis, a rotor that rotates together with the rotation axis and a stator that rotatably supports the rotation axis. The rotor has a closed-end-cup-shaped holder that is mounted at one end of the rotation axis and a permanent magnet fixed on an inner surface of a cylindrical portion of the holder. The stator has a housing bush that supports the rotation axis in an axis hole formed through the center of the housing bush, twelve stator cores that are radially mounted around the housing bush to face the outer tip ends thereof to the permanent magnet with an air gap, and coils that are wound around the stator cores via insulators. The inner base portions of the stator cores are connected to one another with pressure so as to form a ring-shaped yoke by mounting the stator cores around the housing bush.

Abstract: In an electric motor comprising a rotor, a stator, a stator core that constitutes the stator, a core section that constitutes the stator core, a plurality of split core blocks which constitute the core section, and a metallic connection housing that connects the split core blocks in dovetailed form to create one connected core section, the split core blocks are each formed of a laminated steel plate, in that the connection housing is formed of a material softer than the laminated steel plate, and the dovetailed connections at the connection housing are plastically deformed to remove the connection gap existing at each of the dovetailed connections.

Abstract: A core has an annular inner core portion, a rib-shaped core portion extending radially form the annular inner core portion and an outer peripheral core portion that magnetic pole tooth portions are formed in an annular shape on the outer periphery of the rib-shaped core portion, and the core is composed of a plurality of core blocks having the same shapes as blocks formed by dividing the core in circumferential direction, the plurality of core blocks each having a concave/convex engage portion at an inner peripheral portion corresponding to the inner periphery of the annular inner core portion, and the plurality of core blocks gathered so as to form the core are fastened each other by a cylindrical housing having an outer surface formed in concave/convex shape, inserted in the inner peripheral portion so as to engage with each other at the concave/convex engage portions, and changed in diameter relative to the core blocks due to thermal shrinkage or expansion of the cylindrical housing, whereby the core block

Abstract: An electric rotary machine has a concentrated winding stator and a rotor facing the stator with a gap therebetween. The stator has M number of stator magnetic poles extending in the radial direction from an annular yoke, pole pieces each extending in the circumferential direction of the rotor from the tip end of each of the stator magnetic poles, and windings wound around the stator magnetic poles. The rotor having a permanent magnet with P number magnetic poles, wherein P:M=6n−2:6n, or P:M=6n+2:6n, where n is an integer not less than 2, and the figure of each of the pole pieces is so determined that a gap formed between the pole piece and the rotor is increased going toward the both ends of the pole piece.