The invention relates to a brushless direct current motor, having a rotor made up of at least one permanent magnet and a stator having at least three partitions (160) radially extending from a circular based cylindrical main body (170), the partitions (160) together defining at least two volumes for receiving at least three coils generating a magnetic field, wherein each volume is closed by a wall (170) connecting the partitions (160), and in that the wall comprises, on the face thereof oriented toward the rotor, at least one magnetic restriction zone. A sleeve (4) surrounds the stator and the rotor and has at least one deformation zone formed by cutouts (11) adapted to maintain the external geometrical configuration of the sleeve (4) when mounting the constituent elements of the motor. The invention also relates to a method for manufacturing such a motor.

The invention relates to a brushless direct current motor, having a rotor made up of at least one permanent magnet and a stator having at least three partitions (160) radially extending from a circular based cylindrical main body (170), the partitions (160) together defining at least two volumes for receiving at least three coils generating a magnetic field, wherein each volume is closed by a wall (170) connecting the partitions (160), and in that the wall comprises, on the face thereof oriented toward the rotor, at least one magnetic restriction zone. A sleeve (4) surrounds the stator and the rotor and has at least one deformation zone formed by cutouts (11) adapted to maintain the external geometrical configuration of the sleeve (4) when mounting the constituent elements of the motor. The invention also relates to a method for manufacturing such a motor.

An electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.

An electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.

A rotor for a motor includes a sensor ring, a rotor shaft and an over-molded body configured to couple the sensor ring to the rotor shaft. The rotor may further include at least one magnet and a magnet support where the magnet support is disposed between the at least one magnet and the rotor shaft. The over-molded body couples the sensor ring, the rotor shaft, the magnet support and the at least one magnet to each other.

A rotor for a motor includes a sensor ring, a rotor shaft and an over-molded body configured to couple the sensor ring to the rotor shaft. The rotor may further include at least one magnet and a magnet support where the magnet support is disposed between the at least one magnet and the rotor shaft. The over-molded body couples the sensor ring, the rotor shaft, the magnet support and the at least one magnet to each other.

This method is for manufacturing a fan blade rotor which includes an annular rotation support ring around a rotary shaft, a permanent magnet provided alongside the rotation support ring in the radial direction, and a composite material for integrally binding the rotation support ring and the permanent magnet, the method including: a step S1 for arranging the rotation support ring and the permanent magnet side by side in the radial direction; steps S2-S4 for spirally winding, on the rotation support ring and the permanent magnet arranged side by side being as a core, the composite material being an uncured composite material including a reinforcement fiber impregnated with an uncured resin with the fiber direction of the reinforcement fiber set as a longitudinal direction; and a step for curing the resin included in the composite material.

The invention relates to the shaftless horizontal axis wind turbine for generating electricity from the flow of fluid. The major components of the shaftless horizontal axis wind turbine consist of a stator and a rotor. The major components of the stator consist of a set of copper coils installed along a circular circumference of the stator frame and electrically connected as the Star connection (3-phase) circuit. The major components of the rotor consist of at least a set of the turbine blade, roller, and magnet set. The turbine blade has optimized an obtuse angle (θ.sub.T) of the turbine blade holder and a rotation angle (θ.sub.R) between the turbine blade holder and turbine blade to create the open channel in the middle of the shaftless horizontal axis wind turbine, which is shaped like a nozzle without shaft at the center of horizontal axis wind turbine.

One variation of a system for an electric motor includes a rotor including magnetic elements within a body. The system also includes a stator including coil assemblies arranged about the rotor. Each coil assembly includes an outer hook element and an inner hook element. The outer hook element extends across a first axial face and an outer radial surface of the rotor. The inner hook element: extends across a second axial face of the rotor; extends partially across the inner radial surface of the rotor; and is coupled to the outer hook element to define a throat configured to locate the rotor within the coil assembly. The system includes a shaft coupled to the inner radial surface of the rotor. Furthermore, the system includes a controller configured to drive current through the coil assemblies to generate a toroidal magnetic field configured to couple the magnetic elements to rotate the rotor.

One variation of a system for an electric motor includes a rotor including magnetic elements within a body. The system also includes a stator including coil assemblies arranged about the rotor. Each coil assembly includes an outer hook element and an inner hook element. The outer hook element extends across a first axial face and an outer radial surface of the rotor. The inner hook element: extends across a second axial face of the rotor; extends partially across the inner radial surface of the rotor; and is coupled to the outer hook element to define a throat configured to locate the rotor within the coil assembly. The system includes a shaft coupled to the inner radial surface of the rotor. Furthermore, the system includes a controller configured to drive current through the coil assemblies to generate a toroidal magnetic field configured to couple the magnetic elements to rotate the rotor.