Methods, controllers and electric machine systems are described for selective phase control of electric machines (e.g. electric motors and generators).

A gas turbine engine includes a fan and a rotor assembly. The rotor assembly includes a rotor, a plurality of magnets, and an annular retaining sleeve. The rotor includes a radially outer wall spaced apart from a central axis of the engine by an axially forward and an axially aft annular end wall. The magnets are located radially outward of the rotor and arranged on the outer wall in axial alignment with each other, the magnets being configured to move radially relative to each other and remain in contact with the outer wall in response to elastic deformation of the outer wall. The sleeve radially surrounds the magnets so as to structurally support and secure the magnets to the rotor, the sleeve being elastically deformable in the radial direction and configured to elastically deform based on the radial movement of the magnets.

A flux machine includes a stator and a rotor. A set of electrical coil assemblies with side surfaces and sets of plural permanent magnets are arranged circularly on the stator and the rotor. Pole faces of the magnets are positioned adjacent to and spaced apart from side surfaces of permeable cores of the coil assemblies. In each coil assembly a pair of like pole faces of the magnets mutually face across the permeable core and a third magnet pole face faces transversely relative to the mutually facing pole faces of the pair of magnets.

A flux machine includes a stator and a rotor. A set of electrical coil assemblies with side surfaces and sets of plural permanent magnets are arranged circularly on the stator and the rotor. Pole faces of the magnets are positioned adjacent to and spaced apart from side surfaces of permeable cores of the coil assemblies. In each coil assembly a pair of like pole faces of the magnets mutually face across the permeable core and a third magnet pole face faces transversely relative to the mutually facing pole faces of the pair of magnets.

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.

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 multi-pole rotor of a variable-flux memory motor (VFMM) includes: a plurality of poles. Each pole includes: a curved soft magnet, wherein an outer periphery of the curved soft magnet is toward the rotational axis of the rotor; a first non-magnetic and non-conductive material disposed on the outer periphery of the curved soft magnet; and a second non-magnetic and non-conductive material disposed on an inner periphery of the curved soft magnet.

There is disclosed a motor (100) comprising: a stator (120), comprising a core (122) and a plurality of windings (124); and a rotor (140), comprising a plurality of permanent magnets (150, 152, 154), wherein a first portion of the magnets (150, 152) is disposed on two axial rotor portions (142, 144) in close proximity to two respective axial sides of the windings (124), and a second portion of the magnets (154) is disposed on a radial rotor portion (146) in close proximity to a radial side of the windings (124), and wherein energising the windings (124) causes a torque to be applied to the rotor (140) via said two axial rotor portions (144, 144) and said radial rotor portion (146).

An electric motor having a permanent magnet and a compressor including an electric motor are provided. The electric motor may include a stator; and a rotor rotatably disposed and spaced a predetermined gap apart from the stator. The rotor may include a rotational shaft, a permanent magnet arranged concentrically to the rotational shaft, and a permanent magnet support that supports the permanent magnet. The permanent magnet may have a cylindrical shape and be magnetized to have polar anisotropy such that a magnetic field is formed on the magnet's surface facing the gap but is not formed on the magnet's surface opposite to the gap. The permanent magnet support may be configured to form no flux path in the permanent magnet and connect the rotational shaft to the permanent magnet. Thus, the rotor has a reduced weight with consequent suppression of vibration and noise.

An electric motor having a permanent magnet and a compressor including an electric motor are provided. The electric motor may include a stator; and a rotor rotatably disposed and spaced a predetermined gap apart from the stator. The rotor may include a rotational shaft, a permanent magnet arranged concentrically to the rotational shaft, and a permanent magnet support that supports the permanent magnet. The permanent magnet may have a cylindrical shape and be magnetized to have polar anisotropy such that a magnetic field is formed on the magnet's surface facing the gap but is not formed on the magnet's surface opposite to the gap. The permanent magnet support may be configured to form no flux path in the permanent magnet and connect the rotational shaft to the permanent magnet. Thus, the rotor has a reduced weight with consequent suppression of vibration and noise.