An embodiment comprises: a housing; a bobbin disposed in the housing; a coil disposed on the bobbin; a magnet disposed in a side portion of the housing, and including a first side surface facing the coil and a second side surface opposite to the first side surface; and a yoke disposed in the upper portion of the housing and overlapping the magnet in the optical axis direction, wherein: the centerline of the magnet is located on one side with reference to a reference line; a first groove adjoining one end of the first side surface of the magnet is disposed at a first end of the magnet; a second groove adjoining the other end of the first side surface of the magnet is disposed at a second end of the magnet; the reference line passes through the center of the housing and is perpendicular to the outer surface of the side portion of the housing where the magnet is disposed; and the centerline of the magnet is a straight line passing through the center between the first end and the second end of the magnet and perpendicular to the first side surface of the magnet.

A rotary electric machine includes a rotor in which a plurality of permanent magnets are disposed along a rotation circumference and in which a magnetic pole of the permanent magnet is directed in a direction along a rotational axis and a stator in which a plurality of windings are disposed along the rotation circumference in a direction in which the magnetic pole of the permanent magnet is directed. The stator is formed in a direction in which a magnetic path from an end of the stator to an inside of the stator intersects a main magnetic flux direction from the rotor when the rotor is directed toward ends of first to four windings. A plurality of stators, provided along the rotational axis of the rotor, are respectively placed at positions at which gaps between the windings deviate from each other in a rotation circumference direction.

In a first aspect, a method for removing an electromagnetic module from an electrical machine is provided. The electrical machine comprises a plurality of electromagnetic modules having an electromagnetic material. The electromagnetic modules comprise base and a support extending from the base and supporting the electromagnetic material. The base comprises a bottom surface and a first side surface. The first side surface comprises an axially extending groove defining a cooling channel with an axially extending groove of a first side surface of an adjacent electromagnetic module. The method comprises inserting a rod in a cooling channel formed by the groove of the electromagnetic module to be removed and a groove of an adjacent electromagnetic module; releasing the electromagnetic module to be removed from a structure of the electrical machine; and sliding the electromagnetic module to be removed along the rod.

An electric machine, which may operate as an electric motor or generator, that address performance and manufacturing shortcomings in various motor design approaches particularly transverse flux, axial and radial flux motors with higher torque, higher RPM, and lower core losses and lower cogging. An exemplary electric machine incorporates shape monolithic components such as the armature teeth or connector ring, armature ring, concentrator teeth or concentrator ring formed by Soft metal Composite (SMC). Magnets may be configured between the concentrator teeth to form a magnet ring having a plurality of magnetic poles. The armature flux paths may be shared between phases. The air gaps may be axial and extend between armature teeth and concentrator teeth and the magnetic poles configured between the concentrator teeth. The armature, concentrator teeth and magnetic poles may extend radially and alternate along the axial axis of the electric machine, producing axial and/or radial airgaps.

An electric machine, which may operate as an electric motor or generator, that address performance and manufacturing shortcomings in various motor design approaches particularly transverse flux, axial and radial flux motors with higher torque, higher RPM, and lower core losses and lower cogging. An exemplary electric machine incorporates shape monolithic components such as the armature teeth or connector ring, armature ring, concentrator teeth or concentrator ring formed by Soft metal Composite (SMC). Magnets may be configured between the concentrator teeth to form a magnet ring having a plurality of magnetic poles. The armature flux paths may be shared between phases. The air gaps may be axial and extend between armature teeth and concentrator teeth and the magnetic poles configured between the concentrator teeth. The armature, concentrator teeth and magnetic poles may extend radially and alternate along the axial axis of the electric machine, producing axial and/or radial airgaps.

A stator is improved in work efficiency of mounting to a stator core is provided. The stator includes insulators sandwiching the stator core therebetween. The stator core includes a plurality of teeth that radially projects. Each of the insulators includes a plurality of tooth covering portions that radially projects. The tooth covering portions cover the teeth. In a facing portion of one of the insulators facing the stator core, a peripheral portion projects more than a center portion. In a facing portion of the other of the insulators facing the stator core, a center portion projects more than a peripheral portion.

A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.

A wound rotor, such as a wound rotor for an electric machine, includes a shaft having a main axis. The shaft includes a manifold. The wound rotor also includes a winding wire and n poles wound and ordered with an ascending order number obtained by rotation about the main axis. The n wound poles can be distributed radially about the main axis. The n poles are wound with the wire in series in turn according to their ascending order numbers, the last pole, however, not being wound last.

A wound rotor, such as a wound rotor for an electric machine, includes a shaft having a main axis. The shaft includes a manifold. The wound rotor also includes a winding wire and n poles wound and ordered with an ascending order number obtained by rotation about the main axis. The n wound poles can be distributed radially about the main axis. The n poles are wound with the wire in series in turn according to their ascending order numbers, the last pole, however, not being wound last.

An electric motor is provided and includes inner and outer rotors, a stator supportive of back iron radially interposed between the inner and outer rotors and a winding structure. The winding structure includes first phase coils radially interposed between the inner rotor and a first side of the back iron, the first phase coils extending axially along the first side of the back iron, second phase coils radially interposed between a second side of the back iron and the outer rotor, the second phase coils extending axially along the second side of the back iron and end windings respectively extending radially between corresponding ones of the first and second phase coils.