An axial flux rotor for use in a motor with a stator is provided. The rotor includes a body including an outer periphery defined by outside radius OR. The body further has a central opening defined by inner radius IR and a plurality N of rotor poles defining an axis of rotation of the body. The body has first and second opposed faces. The rotor also includes a plurality of spaced apart axially imbedded magnets extending from the first face. At least one of the axially imbedded magnets has a minimum depth defined by defined by the equation $D_{\min }=\frac{*\left(\mathrm{OR}+\mathrm{IR}\right)}{2*N*\mathrm{BrA}}*\mathrm{BrS},$
wherein BrS is the Remanent Flux Density of Surface Mounted Magnet, wherein OR is the outside radius of the body, wherein IR is the inner radius of the body, wherein N is the number of rotor poles, and wherein BrA is the Remanent Flux Density of Axially Imbedded Magnet.

The invention relates to an electric motor comprising: (A) a ring-like rotor which comprises: a plurality of electromagnets that are equi-angularly spaced and equi-radially disposed in a ring-like manner; and, (B) a stator which comprises: a plurality of solenoids that are equi-angularly spaced and equi-radially disposed, each of said solenoids having a solenoid core, which in turn has a rectangular shape in cross-section, and a cavity; and a solenoid coil within each of said solenoids; wherein said electromagnets are arranged such that they can move through said cavities of the solenoid cores in a rotational manner, wherein negative and positive ends, respectively, of the plurality of said electromagnets are connected in parallel to respective negative and positive peripheral strips, and wherein current to the electromagnet coils is supplied from a power supply via two brushes, respectively to the negative and positive strips.

An alternating hybrid excitation assembly and its application to a rotary motor, linear motor and transformer, including: an even number of iron cores and a plurality of magnetic isolation layers arranged between, forming a loop, each core includes one or two notches wherein permanent magnets are inlaid, the two magnetic pole faces are attached to two opposite sides of the notch of the corresponding core, and a gap is reserved between one side face of each magnet and the side edge of the notch of the core; the magnets have opposite magnetic polarity directions, and an excitation coil surrounds the cores. A permanent magnetic potential and an excitation magnetic potential are superimposed to form an alternating hybrid excitation magnetic field, and thus electromagnetic energy efficiency is improved. Further, embodiments of the alternating hybrid excitation assembly applied to the rotary motor, the linear motor and the transformer.

A movable core-type reciprocating motor and a reciprocating compressor having a movable core-type reciprocating motor are provided. The motor may include a stator including an inner stator and an outer stator; a magnet coil wound between the inner stator and the outer stator; a magnet fixed to at least one of the inner stator or the outer stator so as to be at least partially positioned within a range of the air gap; and a mover including a movable core disposed in the air gap and made of a magnetic material to perform a reciprocation movement with respect to the stator.

An electric motor comprising: a stator assembly; a rotor assembly; and a support body. The stator assembly comprises a plurality of stator elements, and the rotor assembly comprises a shaft to which is mounted at least a first and a second bearing mounted either side of a permanent magnet. The support body comprises an elongate central part, and first and second bearing seats positioned axially at opposite ends of the elongated central part to each other, and the elongate central part defines a plurality of openings each configured to receive one of the plurality of stator elements.

A movable core-type reciprocating motor and a compressor having a movable core-type reciprocating motor are provided. The motor may include a stator including an inner stator and an outer stator; a magnet coil wound between the inner stator and the outer stator; a magnet fixed to at least one of the inner stator or the outer stator so as to be at least partially positioned within a range of the air gap; and a mover including at least one movable core disposed in the air gap and made of a magnetic material to perform a reciprocation movement with respect to the stator and the magnet and a connection member made of a non-magnetic material and configured to support the at least one movable core.

An electric motor which comprises: (A) a rotor which comprises: (a.1) a co-centric shaft and disk; and (a.2) a plurality of permanent magnets that are equi-angularly spaced and equi-radially disposed on said disk in a ring-like structure! and, (B) a stator which comprises: (b.1) a plurality of coils having a U-shaped structure in top view and double C-shaped structure in side view, said coils are equi-angularly spaced and equi-radially disposed with respect to said disk of the rotor, each section of said C-shaped structure has a cavity through which said ring-like structure and disk rotationally move; and (b.2) a plurality-of-windings coil within each of said U-shaped coils.

Provided are a moving core-type reciprocating motor and a reciprocating compressor having the same. The moving core-type reciprocating motor includes a stator including an inner stator and an outer stator having one side connected to one side of the inner stator and the other side spaced apart from the other side of the inner stator in a radius direction to define a gap together with the other side of the inner stator, a magnet coil wound between the inner stator and the outer stator, a magnet fixed to at least one of the inner stator and the outer stator so as to be exposed to the gap, a rotor including a moving core disposed in the gas and made of a magnetic material to reciprocate with respect to the stator and the magnet and a hollow connection member made of a nonmagnetic material and supporting the moving core so that the moving core is exposed to the gap toward the magnet. Thus, the reciprocating motor and the reciprocating compressor having the same are compact and lightweight to more improve efficiency.

The invention relates to a stator (8) for an electromagnetic motor or generator comprising windings (4) and a magnetic circuit, the stator (8) comprising a yoke with a circular or polygonal shape and winding support teeth (3). Each winding (4) rests on a tooth (3) while at least partly surrounding a winding support (13, 14), each winding support (13, 14) comprising or being associated with snap snap-fitting means (15) that cooperate with complementary snap-fitting means (3) supported by a tooth (3) associated with the winding support (13, 14) so that the winding support (13, 14) is fastened to the associated tooth (3).

Various embodiments associated with a segmented magnetic core are described. The segmented magnetic core can be made up of multiple singular structures so as to allow an individual singular structure to be removed with ease and without disturbing another magnetic core. This modular core design allows for a significant reduction in motor housing weight due to compatibility of the design with lightweight materials and the potential absence of extensive housing when so designed. This modular core design can be incorporated into a motor or a generator and this modular core design can be accomplished, in one example, by way of stacking and/or interlocking employing low cost assembly. In one example, a motor or a generator uses sensors to detect an operational failure in a magnetic core, notifying a user early of the failure.