A torsion bridge for use in a servovalve includes a body extending along and adapted to rotate about a first axis; a passage extending through the body along a second axis substantially perpendicular to the first axis, the passage defining a first cylindrical surface having a radius R.sub.1; an annular groove formed in the first cylindrical surface. The annular groove includes: a second cylindrical surface extending substantially in the direction of the second axis, the second cylindrical surface having first and second ends and a radius R.sub.2, where R.sub.2 is greater than R.sub.1; a first annular surface joining the first cylindrical surface to the first end of the second cylindrical surface; and a second annular surface joining the second end of the second cylindrical surface to the first cylindrical surface.

The torque motor as disclosed depends on decreasing the gap between a surface on a fixed part and a corresponding inclined facing surface on a rotating part, where the gap width is proportional to its distance from the angle vertex, in magnifying the electromagnetic force and its resulting torque. Therefore, the surface on the fixed part starts directly ator close toa point in align with the rotating part center of rotation, and hence the gap width is minimum at the start point and increases away from this point due to the inclination angle. The motor includes features, such as, utilizing many pairs of facing surfaces, many electromagnetic circuits; arrange the surfaces in pairs for balanced forces, works in one or two directions, the two directions electromagnetic circuits installed in one or two levels, and precautions and ways to avoid magnetic field interference and leakage.

The torque motor as disclosed depends on decreasing the gap between a surface on a fixed part and a corresponding inclined facing surface on a rotating part, where the gap width is proportional to its distance from the angle vertex, in magnifying the electromagnetic force and its resulting torque. Therefore, the surface on the fixed part starts directly ator close toa point in align with the rotating part center of rotation, and hence the gap width is minimum at the start point and increases away from this point due to the inclination angle. The motor includes features, such as, utilizing many pairs of facing surfaces, many electromagnetic circuits; arrange the surfaces in pairs for balanced forces, works in one or two directions, the two directions electromagnetic circuits installed in one or two levels, and precautions and ways to avoid magnetic field interference and leakage.

The disclosure relates to a vehicle lock having a locking mechanism, a lock mechanism and an electrical setting arrangement, wherein the setting arrangement has a rotor arrangement, wherein the stator forms at least two magnetic, unlike stator poles of the stator magnet arrangement, wherein at least one of the magnet arrangements is associated with a coil arrangement, wherein by supplying current to the coil arrangement and a resulting magnetic interaction between rotor and stator, a drive torque to the rotor and thus an adjustment of the rotor can be generated in a predetermined number of actuator positions. Proposed is that the rotor magnet arrangement and the stator magnet arrangement are stationarily fixed to a support section of the motor vehicle lock, and the rotor is pivotable about a rotor axis relative to the support section and relative to the rotor magnet arrangement.

A torque motor for use in a servovalve wherein only two holes must be provided through each of the pole pieces in order to assemble the torque motor together. The torque motor comprises first and second opposing pole pieces, first and second permanent magnets positioned between the first and second pole pieces; an armature comprising a magnetic plate and a flapper, the magnetic plate being positioned between the first and second permanent magnets, the flapper being connected at one end to the magnetic plate; and further comprising: first and second fastening means each extending through the first pole piece, the armature and the second pole piece to thereby fasten the torque motor together.

A drive system for a high torque mechanical load includes a power supply, a controller, and a high torque electric motor. The electric motor includes a rotor that is oriented eccentrically relative to a stator. In one form, the electric motor has a crankshaft that transmit the torque to the mechanical load. In other variations, the electric motor includes at least two electric motor lobes with opposite stroke positions to provide a smoother output at higher speeds. During operation, the rotor is magnetically attracted to the energized electromagnet. With the rotor attracted to the electromagnet in the stator, the rotor contacts or comes in close proximity to the stator at a contact area. The close proximity between the rotor and stator at the contact area allows very large magnetic forces to be utilized to produce torque without increasing the size or weight of the electric motor.

A drive system for a high torque mechanical load includes a power supply, a controller, and a high torque electric motor. The electric motor includes a rotor that is oriented eccentrically relative to a stator. In one form, the electric motor has a crankshaft that transmit the torque to the mechanical load. In other variations, the electric motor includes at least two electric motor lobes with opposite stroke positions to provide a smoother output at higher speeds. During operation, the rotor is magnetically attracted to the energized electromagnet. With the rotor attracted to the electromagnet in the stator, the rotor contacts or comes in close proximity to the stator at a contact area. The close proximity between the rotor and stator at the contact area allows very large magnetic forces to be utilized to produce torque without increasing the size or weight of the electric motor.

A rotating body is rotatably supported on a holding section. The holding section includes a rotation detection unit, a torque-applying unit, and a brake-applying unit. The torque-applying unit includes an A-phase torque-applying coil and a B-phase torque-applying coil, and a resistance torque and a pull-in torque applied to a rotor (magnet) are caused to vary as a result of controlling supply of current to each of the coils. In addition, a braking force can be controlled by supplying current to a brake-applying coil included in the brake-applying unit.

A rotating body is rotatably supported on a holding section. The holding section includes a rotation detection unit, a torque-applying unit, and a brake-applying unit. The torque-applying unit includes an A-phase torque-applying coil and a B-phase torque-applying coil, and a resistance torque and a pull-in torque applied to a rotor (magnet) are caused to vary as a result of controlling supply of current to each of the coils. In addition, a braking force can be controlled by supplying current to a brake-applying coil included in the brake-applying unit.

A movable body portion Sm is configured to reciprocate in a rotation angle range Zm between a first position Xa and a second position Xb according to energization control of a driving coil 6 and to be stopped at the first position Xa and the second position Xb by a pair of self-holding mechanisms 11a and 11 b by restriction of a pair of restricting stopper mechanisms 10a and 10b and attraction of magnets 8a and 8b. when controlling switching from the second position Xb (or the first position Xa) to the first position Xa (or the second position Xb), after a driving voltage based on a driving pulse Ps is applied to the driving coil 6, if the movable body portion Sm has reached a predetermined intermediate position Xp in 10 to 50 [%] of the rotation angle range Zm, control is performed so that application of the driving voltage is stopped.