A stator for interacting with magnets carried by a rotor of an electric machine, the stator comprising: an active region arranged to be aligned with the magnets carried by the rotor; a first inactive region and a second inactive region, wherein the first and second inactive regions are separated by the active region; and a slotless phase winding comprising a plurality of conductive elements, wherein each conductive element comprises a conductor provided in an insulating housing, and wherein the slotless phase winding is arranged in a serpentine structure comprising: a first active segment in which the conductive elements extend across the active region from the first inactive region to the second inactive region; a second active segment in which the conductive elements extend across the active region from the second inactive region to the first inactive region; and an inactive segment coupling the first active segment to the second active segment, wherein the inactive segment comprises a turn provided in the second inactive region, and wherein at least one of the conductive elements is twisted in the second inactive region.

A slot-less motor includes a rotor and a stator which is equipped with a coil assembly made of a combination of a plurality of coils. Each of the coils is designed as an air core coil which includes a pair of effective coil portions and a pair of coil ends. The coils assembly has the effective coil portions each of which is disposed in air cores of the respective adjacent coils. The coils include first coils each of which is not located between a center line and each of outer outlines of a respective adjacent one of the first coils.

A slot-less motor includes a rotor and a stator which is equipped with a coil assembly made of a combination of a plurality of coils. Each of the coils is designed as an air core coil which includes a pair of effective coil portions and a pair of coil ends. The coils assembly has the effective coil portions each of which is disposed in air cores of the respective adjacent coils. The coils include first coils each of which is not located between a center line and each of outer outlines of a respective adjacent one of the first coils.

The present disclosure relates to a motor for a seat sliding device of a vehicle, and includes a coil module in which a plurality of first coils and a plurality of second coils are seamlessly disposed in the circumferential direction to have a cylindrical shape. Therefore, the conventional stator core having a slot and a tooth for installing the coil is not used, thereby implementing miniaturization and light-weight of a motor. and the slot and the tooth do not exist, thereby reducing a cogging torque and reducing the vibration and noise of the motor.

A radial flux rotary electric machine having an exterior-rotor configuration is shown. The machine has a permanent-magnet rotor comprising permanent magnets in a Halbach array, and an air-cored stator interior to the rotor having teeth defining tapered slots and distributed windings around the teeth to form coils in a double-layer arrangement, the windings being comprised of a plurality of phase windings. For each tooth T having a slot S1 on one side thereof and a slot S2 on another side thereof, a coil side C1 of a phase winding is arranged to occupy a radially inner layer of the slot S1 and a coil side C2 of the same phase winding is arranged to occupy a radially outer layer of the slot S2, wherein the coil side C1 has a smaller circumferential dimension and a larger radial dimension than the coil side C2.

The present invention relates to a coil module for an electric machine, comprising at least one coil disc comprising a coil carrier made of an electrically insulating material and a plurality of individual windings made of an electrically conductive material and being circumferentially arranged on the coil disc around a center of the coil disc. Each of the windings comprises two active regions extending radially from the center and two passive regions extending tangentially at its radially outer and inner edges, wherein, in a top view of the coil disc, the active regions of different windings do not overlap each other, but each passive region of one of the windings partially overlaps the corresponding passive regions of the two directly adjacent windings. In the active regions, the respective winding in cross-section has a greater thickness in the axial direction than in the passive regions.

A coil support for an electric motor includes a coil holding arrangement having coil holding portions configured to hold a corresponding number of coils. A connectics receiving arrangement is configured as a housing for interconnected cables and coil wires. The connectics receiving arrangement comprises a cable receiving portion having recesses configured to receive the cables and a wire receiving portion having through-holes extending from a top surface to a bottom surface of the wire receiving portion. The top surface of the wire receiving portion is arranged adjacent the coil holding arrangement and the bottom surface of the wire receiving portion is located in the connectics receiving arrangement so as to provide for electrical interconnection of the coils with corresponding ones of the cables. A separation wall is arranged between the bottom surface of the wire receiving portion and the coil holding arrangement.

A column type coreless motor is provided, having has no iron loss, low heat loss and high efficiency. The motor includes a stator, a rotor and a motor housing, wherein the rotor is a column type structure with a U-shaped annular groove, and the stator is placed in the U-shaped annular magnetic field of the rotor. In some embodiments, the stator is made by solidifying a coil therein with a thermosetting material through a pressure device, and the coil is wound by combining multiple enameled wires into a phase line, successively superposing three-phase lines, and winding each phase line in a toothed circle shape. The rotor is provided with a heat dissipation fan, and the fan discharges the heat generated by the coil out of the motor through a heat dissipation air passage in the motor housing, effectively ensuring the heat dissipation effect of the motor.

A column type coreless motor is provided, having has no iron loss, low heat loss and high efficiency. The motor includes a stator, a rotor and a motor housing, wherein the rotor is a column type structure with a U-shaped annular groove, and the stator is placed in the U-shaped annular magnetic field of the rotor. In some embodiments, the stator is made by solidifying a coil therein with a thermosetting material through a pressure device, and the coil is wound by combining multiple enameled wires into a phase line, successively superposing three-phase lines, and winding each phase line in a toothed circle shape. The rotor is provided with a heat dissipation fan, and the fan discharges the heat generated by the coil out of the motor through a heat dissipation air passage in the motor housing, effectively ensuring the heat dissipation effect of the motor.

A rotating electrical machine is equipped with a rotor and a stator. The rotor includes a magnet unit and a rotor core retaining the magnet unit. The rotor core is made of a stack of annular core plates and an annular end plate mounted on an end of the stack of the core plates. The end plate has a deformable wave shape. The stack of the core plates and the end plate has formed therein through-holes extending through a length thereof. Bar-shaped fastening members, such as rivets, which have flanges on ends thereof are inserted into the through-holes with the flanges pressing the end plate to elastically deform the wave shape of the end plate, thereby tightly gripping the stack of the core plates in the lengthwise direction. This minimizes concentration of stress on the core plates to eliminate a risk of damage or breakage of the rotor.