A motor includes a stator and a rotor having an axis of rotation and a magnet. The stator includes a PCB having PCB panels. Each PCB panel is assigned to one electrical phase. Each PCB panel has a pair of PCB layers. Each PCB layer includes coils, and each coil in each PCB layer of a PCB panel is circumferentially aligned with a corresponding coil in another PCB layer. One coil in one PCB layer is coupled to a corresponding coil in another PCB layer with a via. A number of turns in each coil is a multiple of a number of electrical phases configured for the PCB stator. In addition, the vias that connect two coils in a pair of PCB layers that belong to a same electrical phase do not intersect coils in PCB layers that belong to other electrical phases of the PCB stator.

The invention relates to a non-cogging electric generator having at least one stator and at least one dual rotor, wherein the dual rotor comprises a plurality of primary magnet devices arranged in circular Halbach array. Non-cogging is achieved by having inner and outer rotor rotating synchronously. Concentration of magnetic flux is achieved by magnetic devices tapering into pyramidal shape, such that magnetic devices arranged on the inner rotor are facing magnetic devices on the outer rotor, whereas said magnetic devices are facing each other with the opposite polarity. Stator comprises electrical wire windings and is positioned between inner and outer rotor.

A device has a housing and rotors rotatably coupled to the housing. Each rotor has a magnet on at least one side of the rotor. Printed circuit board (PCB) stators are located axially between the rotors and coupled to the housing. The PCB stators have layers, and each layer has coils. The number of rotors disks is equal to the number of stators plus one. The stators are interleaved with the rotors. A shaft is coupled to the rotors and the housing. The shaft has a hollow section coupled to a source of a liquid coolant through a rotary connector and to radial channels in the shaft that dispense a liquid coolant between the rotors and PCB stators. The shaft has flanges with different diameters configured to receive the rotors disks with respective matching bore diameters. In addition, the housing has a sump to collect the liquid coolant.

A device has a housing and rotors rotatably coupled to the housing. Each rotor has a magnet on at least one side of the rotor. Printed circuit board (PCB) stators are located axially between the rotors and coupled to the housing. The PCB stators have layers, and each layer has coils. The number of rotors disks is equal to the number of stators plus one. The stators are interleaved with the rotors. A shaft is coupled to the rotors and the housing. The shaft has a hollow section coupled to a source of a liquid coolant through a rotary connector and to radial channels in the shaft that dispense a liquid coolant between the rotors and PCB stators. The shaft has flanges with different diameters configured to receive the rotors disks with respective matching bore diameters. In addition, the housing has a sump to collect the liquid coolant.

An axial flux motor may include a motor housing, a shaft rotatably mounted in the housing, and a stator mounted in the motor housing, and having a stator ring and a through-hole through which the shaft extends. Two rotors may be mounted on the shaft within the motor housing on opposing sides of the stator, each rotor having a plurality of magnets arranged radially on a stator-facing surface thereof. In addition, magnet wire may be wound on portions of the stator, the magnet wire comprising an inner coolant passage disposed within a copper tube, and a green glass coating on an outer surface of the copper tube, the green glass coating comprising glass solids, one or more of surfactants, solvents, and polymers.

An electric motor adapted to apply torque to a drive shaft rotatable about an axis, the electric motor includes a stator, a rotor adapted to rotate relative to the stator, a primary bearing interoperably coupled to the stator and adapted to provide bearing support between the stator and the rotor, an auxiliary bearing interoperably coupled to the drive shaft, an annular shear adapter connected to the primary bearing and the auxiliary bearing, and a shear pin interoperably coupled to the primary bearing via the annular shear adapter and configured to break responsive to torque between the annular shear adapter and the drive shaft exceeding a predetermined torque threshold.

An induction generator having alternating layers of: (a) at least one rotating magnetic disk assembly with at least one magnet in each such disk; and (b) at least one stationary induction disk (a/k/a conductor disk assembly) with at least one conductive loop (i.e., at least one conductor) in each such conductor disk assembly. In one embodiment, the conductor has the shape of a compressed helicoid.

A scroll compressor includes a rotor, a stator, a rotary shaft, an end bracket, an orbiting scroll, a fixed scroll, a suction type cooling fan, and a discharge brush. The discharge brush is fixed to the end bracket facing the cooling fan by a fixing member attached in a radial direction relative to the rotary shaft, and one end of which is in contact with the rotary shaft, in a space secured by the clearance.

Disclosed are axial-gap electrical machines which magnetic core elements are made of wound magnetic ribbons to provide relatively lightweight and small size implementations that can be operated in a wide range of operational modes with minimized magnetic and electrical losses. The axial-gap electrical machine includes a cylindrically-shaped stator assembly having a central passage passing therealong, a rotatable shaft passing within the central passage of the stator assembly coaxial to the axis of rotations of the electric machine, and one or two annular rotor assemblies concentrically attached to the shaft and magnetically coupled to the at least one cylindrically-shaped stator assembly. The stator assembly can have a plurality of prism-shaped magnetic core elements made from a plurality of magnetic ribbon layers extending along its length, and a primary winding comprising a plurality of coils mounted over the prism-shaped magnetic core elements.

An axial flux motor includes: a stator having a first side and a second side opposite the first side, the stator including: N stator core components on the first side, where N is an integer greater than two; and pole shoes attached to radial sides of the N stator core components, N slot openings between adjacent ones of the pole shoes, where each of the N slot openings extends in at least one direction non-radially on the first side; and a rotor including a third side and M permanent magnets on the third side, where the first side is parallel to the third side, and where M is an integer greater than two.