Abstract: A permanent magnet (PM) machine includes a rotor and a stator assembly. The rotor includes a plurality of permanent magnets disposed about an axis of rotation. The stator assembly includes a stator body, a plurality of coil sides and a plurality of sintered iron magnetic wedges. The stator body includes a plurality of stator teeth defining a plurality of stator slots, each stator slot having an inside position and an outside position, such that each of the plurality of stator slots includes a first plurality of inside positions, and a first plurality of outside positions. The first plurality of coil sides are disposed in each of the first plurality of inside positions and the first plurality of outside positions. The first plurality of coil sides correspond to a first power phase. The first plurality of coil sides are electrically coupled to one another by a first plurality of end-coils.

Abstract: A control apparatus for a machine that can be operated at high precision in a stable control state is provided by driving a movable body with control parameters suited to the mechanical state. A control parameter calculation circuit is provided to obtain control parameters for a drive apparatus control circuit for driving actuators in accordance with the conditions of actuator rotational velocity, the orientation of the movable body, and the position of the movable body, and a control parameter K for the drive apparatus control circuit is varied.

Abstract: A pulse excitation circuit applies a constant voltage to windings, each of which is wound around a respective one of four magnetic poles of a resolver stator. In each of the respective windings, a voltage is generated corresponding to the rotation of the resolver rotor. From the generated voltage, it is possible to detect two flows of electrical currents which have different phases from each other. Values of the electrical currents after a lapse of time 2*Lav/r from the start of pulse excitation (Lay is an average inductance of the windings, while r is a DC resistance of a winding, including an electrical current detection resistance) are converted into two digital values. A micro computer calculates a rotation angle signal .theta. on the basis of the two digital values.

Abstract: A rotational position detection encoder includes at least two detection heads located along a slit string of a code plate. The detection signals of one of the detection heads are processed to generate a plurality of phase offset signals having successively differing phases with respect to each other. The phase offset signals are compared with the detection signals of another of the detection heads, and the phase offset signals having a phase closest to that of the detection signals of the other detection head are selected and added to the detection signals of the other detection head. As such, detection signals having conforming phases are obtained without minute positional adjustment of the detection heads.

Abstract: An electric motor having a cage pivotally mounted at one end to a post interior a housing by a first bearing and at its other end by a second bearing between the exterior of the cage and the interior of the housing. A first stator is mounted to the interior of the cage and has an output shaft and first rotor interior thereto. A second rotor is mounted to the exterior of the cage and interior a second stator which is mounted interior the housing. The second stator is driven with a control signal which is a function of the measure reaction torque experienced by the first stator to produce a counter torque to balance the reaction torque. A consistency transmitter mounted on the output shaft produces torque on the first stator as a function of the consistency of the material in which it is rotated.

Abstract: An electric motor having a first rotor on an output shaft, a first stator pivotally mounted to a housing, a second rotor mounted to the first stator and a second stator mounted to the housing. The second stator is driven with a control signal which is a function of the measure reaction torque experienced by the first stator to produce a counter torque to balance the reaction torque. A consistency transmitter mounted on the output shaft produces torque on the first stator as a function of the consistency of the material in which it is rotated.

Abstract: A selectably positionable rotary transducer including a first member having at least one permanent magnet associated therewith and a second member arranged for rotational motion relative to the first member in a first plane, the second member defining an odd number of poles and associated apparatus for selectively providing a magnetic force of selected polarities to individual ones of the poles to cause the first member to assume selectable positions with respect to the second member. Numbering apparatus preferably having an odd number of poles is also described.