There is provided a pole piece for a torque motor, wherein the pole piece is formed at least partially by two arcuate members extending in opposite directions and following a generally circular path defining a perimeter of the pole piece, wherein the arcuate members meet each other at diametrically opposed attachment portions of the pole piece.

There is provided a pole piece for a torque motor, wherein the pole piece is formed at least partially by two arcuate members extending in opposite directions and following a generally circular path defining a perimeter of the pole piece, wherein the arcuate members meet each other at diametrically opposed attachment portions of the pole piece.

An assembly for use in a servovalve is provided. The assembly includes: a moveable member having a first end and a second end, the moveable member extending along a longitudinal axis (A-A) from the first end to the second end; and a torsion bridge, the torsion bridge extending around the moveable member at the first end thereof, and being adapted to rotate about a rotation axis (A.sub.r), wherein the rotation axis (A.sub.r) extends perpendicular to the longitudinal axis (A-A), and wherein the moveable member and the torsion bridge form an integral part having a planar surface adapted to receive a planar surface of an armature.

An assembly for use in a servovalve is provided. The assembly includes: a moveable member having a first end and a second end, the moveable member extending along a longitudinal axis (A-A) from the first end to the second end; and a torsion bridge, the torsion bridge extending around the moveable member at the first end thereof, and being adapted to rotate about a rotation axis (A.sub.r), wherein the rotation axis (A.sub.r) extends perpendicular to the longitudinal axis (A-A), and wherein the moveable member and the torsion bridge form an integral part having a planar surface adapted to receive a planar surface of an armature.

One example device includes a rotor platform that rotates about an axis of rotation. The device also includes a ring magnet mounted to the rotor platform to provide a rotor-platform magnetic field. The device also includes a stator platform that includes a planar mounting surface. The device also includes a plurality of conductive structures disposed along the planar mounting surface. The conductive structures remain within a predetermined distance to the ring magnet in response to rotation of the rotor platform about the axis of rotation. The conductive structures are electrically coupled to define an electrically conductive path that at least partially overlaps the ring magnet. The device also includes circuitry that causes an electrical current to flow through the conductive path. The electrical current generates a stator-platform magnetic field that interacts with the rotor-platform magnetic field such that the rotor platform rotates about the axis of rotation.

One example device includes a rotor platform that rotates about an axis of rotation. The device also includes a ring magnet mounted to the rotor platform to provide a rotor-platform magnetic field. The device also includes a stator platform that includes a planar mounting surface. The device also includes a plurality of conductive structures disposed along the planar mounting surface. The conductive structures remain within a predetermined distance to the ring magnet in response to rotation of the rotor platform about the axis of rotation. The conductive structures are electrically coupled to define an electrically conductive path that at least partially overlaps the ring magnet. The device also includes circuitry that causes an electrical current to flow through the conductive path. The electrical current generates a stator-platform magnetic field that interacts with the rotor-platform magnetic field such that the rotor platform rotates about the axis of rotation.

A torque motor includes a large area rotor, a stator surrounding at least a portion of the rotor, and a small air gap separating the rotor from the stator to allow frictionless thermal coupling between the rotor and the stator. Heat from the rotor is transferred to the stator by conduction. The stator contacts an inner surface for a housing of the torque motor for conductively coupling to a cold environment air flow exterior to the torque motor housing. The air gap may have a dimension of about 0.002 to 0.003 inches. The stator may be conductively coupled to the torque motor housing by one of a thermal gap pad or high conductivity thermal gap filling compound. Heat conduction from the rotor to the stator preferably occurs without rotation of the rotor.

A torque motor includes a large area rotor, a stator surrounding at least a portion of the rotor, and a small air gap separating the rotor from the stator to allow frictionless thermal coupling between the rotor and the stator. Heat from the rotor is transferred to the stator by conduction. The stator contacts an inner surface for a housing of the torque motor for conductively coupling to a cold environment air flow exterior to the torque motor housing. The air gap may have a dimension of about 0.002 to 0.003 inches. The stator may be conductively coupled to the torque motor housing by one of a thermal gap pad or high conductivity thermal gap filling compound. Heat conduction from the rotor to the stator preferably occurs without rotation of the rotor.

An automobile steering simulator structure comprising a shell rotor, a coil stator, permanent magnets, a base, a steering wheel, the shell rotor, the coil stator and the permanent magnets form a slice motor, a first cavity is provided inside the base, a front end cover is screwed on a side of the shell rotor away from the base, a second cavity is between the front end cover and the shell rotor, a first PCB board is arranged inside of the first cavity and a second PCB board is arranged inside of the second cavity, a magnetic encoder rotating shaft rotationally installed in middle of the base is arranged between the first and second cavity, a conductive slip ring is arranged outside the shaft, both ends of the conductive slip ring are respectively connected to the first and second PCB board, a position sensor is arranged at bottom of the shaft.

A two-dimensional motor and a servo valve are provided. The two-dimensional motor includes a stator and a rotator arranged coaxially. The stator is enclosed in the rotor. The stator and the rotor are spaced along a radial direction of the rotor. A size of the stator along an axial direction is greater than a size of the rotor along the axial direction. The rotor is, without bearing support, directly connected to an external mechanism. The rotor is swung at a predetermined angle, such that the external mechanism can drive the rotor to move along an axial direction of the rotor relative to the stator.