The electric machine includes a plurality of rotors drivingly coupled to a common shaft defining a shaft axis about which the common shaft is rotatable, and a common stator for the plurality of rotors, the common stator extending circumferentially about the common shaft. The rotors are rotatable about respective rotor axes which are substantially perpendicular to the shaft axis.

A dual-rotor machine comprising a dual rotor support structure rotatably connected to a frame. A stationary stator is disposed between the rotors and is fixed to the frame. An inner rotor and outer rotor, each comprising a permanent magnet Halbach array, are coaxially disposed with the stator and are rotable about the stator. In this configuration, the inner rotor channels its magnetic flux to its outside, while the outer rotor channels its magnetic flux to its inside. The magnetic flux density at the stator for the dual-rotor machine can be as high as 2 Tesla or higher for high-grade neodymium-iron-boron permanent magnet material, and the stored magnetic energy for conversion to mechanical or electrical energy available to the stator may be at least 0.5 kJ/m. The rotor Halbach arrays may comprise monolithic permanent magnets with continuously variable magnetic field direction.

A dual-drive device for sequential scanning includes a moving part comprising a frame and an optical instrument that is positioned on the frame and is rotatable about a first axis with respect to the frame so as to be slowed down or immobilized in a plurality of successive positions about the first axis, a motor configured to set the moving part in rotation about the first axis in a first direction of rotation at a constant speed, the moving part comprising a first actuator positioned on the frame and configured to actuate the rotation of the optical instrument about the first axis with respect to the frame in the first direction of rotation in order to pass from a first position to a successive position from the plurality of successive positions, and in a second direction of rotation, opposite to the first direction of rotation, in order to slow down or immobilize the optical instrument in the successive position.

A non-mechanical differential coaxial counter-rotating power device (100) includes an inner shaft (51), an outer shaft (52), a reluctance rotor (30), a permanent magnet rotor (40), a stator (10) and a driving device (20). The outer shaft (52) is fitted over the inner shaft (51), an end of the inner shaft (51) protruding from the outer shaft (52). The reluctance rotor (30) is connected to one of the end of the inner shaft (51) and an end of the outer shaft (52), and the permanent magnet rotor (40) is connected to the other one of the end of the inner shaft (51) and the end of the outer shaft (52). The stator (10) is coaxially disposed with the reluctance rotor (30) and disposed at an inner side or an outer side of the reluctance rotor (30) opposite to the permanent magnet rotor (40). The stator (10) includes a stator core (11) and a main winding (12) and an auxiliary winding (13), and the main winding and the auxiliary winding are wound around the stator core (11). The driving device (20) is connected to the main winding (12) and the auxiliary winding (13) to drive the main winding (12) and the auxiliary winding (13), respectively.

Electrical power generation in turbine engines in provided by a permanent magnet that emits a first magnetic field and is disposed on a first rotor assembly of a turbine engine; an armature winding connected to a second rotor assembly of the turbine engine such that the armature winding is positioned within the first magnetic field; a resonant emitter configured to receive an electrical power input from the armature winding to generate a second magnetic field of at least a predefined frequency when the first rotor assembly rotates relative to the second rotor assembly; and a resonant receiver disposed on an enclosure of the turbine engine, positioned to receive the second magnetic field and convert the second magnetic field into an electrical power output.

Described herein are appliances such as a vacuum cleaners having an air flow passage and a fan assembly provided in the air flow passage. The fan assembly includes (a) a first motor comprising a first rotor, a first stator, and a first rotatable output shaft drivingly connected to the first rotor; and (b) a second motor comprising a second rotor, a second stator, and a second rotatable output shaft drivingly connected to the second rotor. The first rotatable output shaft is driving connected to the second stator; and a fan blade drivingly connected to the second rotatable output shaft. Also described herein are methods of energizing a fan assembly of a portable appliance.

An electromechanical machine that uses electrical power to provide electromechanically-balanced motive torque to one or more mechanical loads, or that uses electromechanically-balanced mechanical power from one or more sources of motive torque to supply electrical power to one or more loads, while seamlessly reconciling the speed and torque differences between such loads-and-sources by use of speed-torque modules and a control means.

The electric machine includes a plurality of rotors drivingly coupled to a common shaft defining a shaft axis about which the common shaft is rotatable, and a common stator for the plurality of rotors, the common stator extending circumferentially about the common shaft. The rotors are rotatable about respective rotor axes which are substantially perpendicular to the shaft axis.

A dual-rotor machine comprising a dual rotor support structure rotatably connected to a frame. A stationary stator is disposed between the rotors and is fixed to the frame. An inner rotor and outer rotor, each comprising a permanent magnet Halbach array, are coaxially disposed with the stator and are rotable about the stator. In this configuration, the inner rotor channels its magnetic flux to its outside, while the outer rotor channels its magnetic flux to its inside. The magnetic flux density at the stator for the dual-rotor machine can be as high as 2 Tesla or higher for high-grade neodymium-iron-boron permanent magnet material, and the stored magnetic energy for conversion to mechanical or electrical energy available to the stator may be at least 0.5 kJ/m. The rotor Halbach arrays may comprise monolithic permanent magnets with continuously variable magnetic field direction.

The present invention is an electric propulsion motor that can be used to propel air, land, and sea vehicles consisting of a gyroscope's flywheel that has been split into two counter rotating sections, perimeter and hub, each section containing spokes that are shaped to produce thrust when rotated, a stator with individually controlled field coils located on its inside and outside diameters, permanent magnets integrated into the flywheel sections proximate to the stator's field coils, and a bearing system to support each flywheel section. The invention is self-contained needing no external propulsion or drive means, self-stabilizing due to the gyroscopic forces created by its spinning hub and perimeter flywheels, thrust producing because of the shape of the spokes of the two flywheels, and rotational torque cancelling with counter rotating flywheel sections. A Chimara Effect is created that both stabilizes and propels the vehicle.