Abstract: A motor module includes a motor and a rotation angle detector including a rotation angle calculator that calculates a rotation angle based on a voltage and an electric current of the motor, a first signal generator that generates a first signal based on a ripple component included in the electric current, an operation part that corrects the rotation angle based on the first signal and the rotation angle, and a rotation information calculator that calculates information on rotation of the motor based on an output from the operation part. The operation part outputs, to the rotation angle calculator, a command to correct the rotation angle when the first signal is generated for the first time while the rotation angle is within a predetermined angle range, and ignores the first signal that is generated for the second or subsequent time while the rotation angle is within the predetermined angle range.

Abstract: The invention relates to an electric motor comprising: (A) a ring-like rotor which comprises: a plurality of electromagnets that are equi-angularly spaced and equi-radially disposed in a ring-like manner; and, (B) a stator which comprises: a plurality of solenoids that are equi-angularly spaced and equi-radially disposed, each of said solenoids having a solenoid core, which in turn has a rectangular shape in cross-section, and a cavity; and a solenoid coil within each of said solenoids; wherein said electromagnets are arranged such that they can move through said cavities of the solenoid cores in a rotational manner, wherein negative and positive ends, respectively, of the plurality of said electromagnets are connected in parallel to respective negative and positive peripheral strips, and wherein current to the electromagnet coils is supplied from a power supply via two brushes, respectively to the negative and positive strips.

Abstract: A ram air turbine having a turbine with one or more blades, a strut having a drive section and a generator adapter section, a turbine shaft and bevel gear located within the drive section, a generator positioned within the generator adapter section of the strut and comprising an exciter and permanent magnet generator in the a turbine side, and a driveshaft having a pinion gear that engages with the bevel gear, wherein the driveshaft is removably coupled to the generator. The strut includes a cone positioned between the drive section and the generator adapter section, and the permanent magnet generator and the exciter are positioned inside of the cone of the strut. The generator utilizes a generator cover and a generator bearing, and the bearing engages with the driveshaft and the generator. The permanent magnet generator and the exciter are positioned within the cone of the generator cover.

Abstract: A flux-focused, shaped permanent magnet includes a body of magnetic material having multiple surface contouring to form a reduced flux side with convex surfaces and an increased flux side with concave surfaces. The surfaces develop high and low resistance external flux paths creating focused asymmetric flux fields. A magnetic unit having the shaped permanent magnet and a magnetic flux attracter or two shaped permanent magnets interconnected by two segmented permanent magnets and a kinetic device having a stationary stator ring, a rotor disc rotating within the stator ring and a multiplicity of the magnetic units on the stator ring and the rotor disc, are also provided.

Abstract: The armature of a direct-current motor is formed by an armature core and armature coils. the core includes teeth, which are arranged at a pitch of a predetermined angle. The coils are wound about every group of selected teeth of a predetermined number. Two magnets face each other with the armature in between. Each magnet includes main portion, an extended portion, which extends from the main portion, and a first weak flux part. The first weak flux part is located in the vicinity of the border of the extended portion and the main portion. The first weak flux part extends along one pitch of the teeth. The flux of the first weak flux part gradually increases along the rotation direction of the armature. The motor also includes a commutator, which has segments. The segments are connected to each coil. A pair of brushes can contact each segment. The brushes supply current to the coils through the segments.

Abstract: The present invention provides an SR motor in which magnetic pole utilization is improved by increasing an overlapping area between projecting poles. A stator 10 is provided at its outer peripheral surface with slots SR1 through SR12. Between two adjacent slots, each of poles S1 through S12 are defined. Each of coils Aa, Ab, ba, Bb, Ca, and Cb is wound along any two slots between which two other slots are placed such that the coils Aa, Ba, and Ca are in parallel to the coils Ab, Bb, and Cb, respectively. Along an inner peripheral surface of a rotor 20, a plurality of circumferentially spaced magnetically insulated pieces J1 through J8 formed of magnetic material are mounted. When each of the pieces J1 through J8 is in opposition to the two adjacent poles of the stator 10, each of the coils generates a closed-loop magnetic flux that passes through the magnetic material piece and the poles corresponding thereto, thereby producing a torque.

Abstract: A direct current motor is comprised of an armature, magnets arranged to face each other through the armature, a commutator and brushes. The armature has a core and a plurality of coils wound on the core. Each magnet has a main part and an extension extending form the main part. The main part has an angular interval which corresponds to an interval of winding each coil, so that the extension is positioned outside the coil in the circumferential direction. During the commutation period of the coil, that is, during shorting of the coil by the brush, the amount of magnetic flux passing through the coil is changed by the extension of the magnet. Thus, an induction voltage is generated in the coil to counteract to a reactance voltage of the coil.