The invention relates to a torque motor comprising a stator and a rotor that extend along a common central axis. The stator includes an integral magnetic body and at least one pair of radial teeth that extend along the central axis and define slots for receiving stator windings, and at least one permanent magnet supported by the integral magnetic body. The torque motor also includes a winding support for the stator windings that has a hollow body that extends along the central axis and that delimits a chamber for receiving the rotor, and cavities for receiving the stator windings. In this way, the stator windings are integrated in the stator by the winding support, fitted with the stator windings, being axially inserted into the integral magnetic body.

A stator unit includes an A-phase yoke, a B-phase yoke, a first resin portion, and a second resin portion. The A-phase yoke and the B-phase yoke include pole teeth. The first resin portion includes an A-phase yoke filling part in an inner space of the A-phase yoke and a B-phase yoke filling part in an inner space of the B-phase yoke. The second resin portion includes a sealing part between the pole teeth. An A-phase bobbin separates the A-phase yoke filling part from the sealing part. A B-phase bobbin separates the B-phase yoke filling part from the sealing part.

A stator unit includes an A-phase yoke, a B-phase yoke, a first resin portion, and a second resin portion. The A-phase yoke and the B-phase yoke include pole teeth. The first resin portion includes an A-phase yoke filling part in an inner space of the A-phase yoke and a B-phase yoke filling part in an inner space of the B-phase yoke. The second resin portion includes a sealing part between the pole teeth. An A-phase bobbin separates the A-phase yoke filling part from the sealing part. A B-phase bobbin separates the B-phase yoke filling part from the sealing part.

A multi-degree-of-freedom electromagnetic machine includes a stator, an armature, and a control. The stator includes a first, second, and third stator conductors that follow first, second, and third trajectories that are all different, and that together form a general shape of a surface. The armature is disposed adjacent to, and is movable relative to, the stator, and includes a plurality of spaced-apart armature coils. Each armature coil is configured, upon being electrically energized, to generate a magnetic field. The control is coupled to the first, second, and third stator conductors, and to the armature coils and is configured to: (i) supply DC to the stator conductors, and (ii) supply DC to one or more of the armature coils, to thereby generate one or more magnetic fields that interact with the stator conductors and vary an orientation of the one or more magnetic fields relative to the stator conductors.

A multi-degree-of-freedom electromagnetic machine includes a stator, an armature, and a control. The stator includes a first, second, and third stator conductors that follow first, second, and third trajectories that are all different, and that together form a general shape of a surface. The armature is disposed adjacent to, and is movable relative to, the stator, and includes a plurality of spaced-apart armature coils. Each armature coil is configured, upon being electrically energized, to generate a magnetic field. The control is coupled to the first, second, and third stator conductors, and to the armature coils and is configured to: (i) supply DC to the stator conductors, and (ii) supply DC to one or more of the armature coils, to thereby generate one or more magnetic fields that interact with the stator conductors and vary an orientation of the one or more magnetic fields relative to the stator conductors.

A servo valve torque motor apparatus including a pair of pole pieces; one or more permanent magnet(s) held between the pole pieces an armature supported between the pole pieces for rotation about an axis; the armature being for connection to a member that resists rotation of the armature; and a coil on the armature; wherein when an electrical current is passed through the coil the armature is rotated against the member; and wherein the magnet(s) is/are secured to the two pole pieces by mechanical fixings passing through holes in the magnet(s).

A mechanism comprises a first Halbach cylinder having an inner cavity, the first Halbach cylinder magnetized to produce a first magnetic flux concentrated circumferentially inside the inner cavity. A second Halbach cylinder is concentrically received in the inner cavity of the first Halbach cylinder to concurrently form a rotational joint having a rotational axis. One of the Halbach cylinders is a rotor and the other of the Halbach cylinders is a stator, the second Halbach cylinder magnetized to produce a second magnetic flux concentrated circumferentially outwardly. An output is connected to the rotor to rotate therewith relative to the stator, the output applying a gravity load on the rotor, the gravity load being offset from the rotational axis, whereby the magnetic flux of the first Halbach cylinder and the second Halbach cylinder cooperatively produce a torque against the gravity load caused by the output.

An actuator includes a yoke extending about a rotation axis. A coil is wrapped about the yoke. A rotor having a direct axis and a quadrature axis is supported for rotation about a rotation axis relative to the yoke. The rotor has a reluctance along the direct axis that is different than a reluctance along the quadrature axis to rotate the rotor when current is applied to the coil.

Disclosed is a powered transport cargo system, and a method of retrofitting a powered transport cargo system that includes braking rollers. The method includes replacing a power drive unit (PDU) of the powered transport cargo system with a PDU including a permanent magnet motor (PMM), and removing a braking roller from the powered transport cargo system.

Disclosed is a powered transport cargo system, and a method of retrofitting a powered transport cargo system that includes braking rollers. The method includes replacing a power drive unit (PDU) of the powered transport cargo system with a PDU including a permanent magnet motor (PMM), and removing a braking roller from the powered transport cargo system.