According to an embodiment, a rotating electrical machine includes a rotor and a stator. The rotor includes a first coil, first magnetic poles and second magnetic poles. The stator includes a second coil, third magnetic poles and fourth magnetic poles. One of a first magnetic pole and a second magnetic pole opposite to the first magnetic pole is formed such that a leading end of the one of the first magnetic pole and the second magnetic pole lies opposite a central portion of an opposite surface of the stator. One of a third magnetic pole and a fourth magnetic pole opposite to the third magnetic pole is formed such that a leading end of the one of the third magnetic pole and the fourth magnetic pole lies opposite a central portion of an opposite surface of the rotor.

According to an embodiment, a rotating electrical machine includes a rotor and a stator. The rotor includes a first coil, first magnetic poles and second magnetic poles. The stator includes a second coil, third magnetic poles and fourth magnetic poles. One of a first magnetic pole and a second magnetic pole opposite to the first magnetic pole is formed such that a leading end of the one of the first magnetic pole and the second magnetic pole lies opposite a central portion of an opposite surface of the stator. One of a third magnetic pole and a fourth magnetic pole opposite to the third magnetic pole is formed such that a leading end of the one of the third magnetic pole and the fourth magnetic pole lies opposite a central portion of an opposite surface of the rotor.

An electrical motor system comprises a switched reluctance electrical motor comprising a rotor section and a stator section, the rotor section comprising a plurality of rotor teeth and the stator section comprising a plurality of stator teeth, the stator teeth wound with respective coils. Coil driver circuitry is coupled to the coils of the stator teeth and controls an independent phase of electrical power to each coil of the plurality of stator teeth. The coils of the stator teeth each have an inductance which absorbs electrical energy provided to that coil by the coil driver circuitry and subsequently releases at least a portion of the electrical energy back to the coil driver circuitry when that coil is not being actively driven by the coil driver circuitry. The coil driver circuitry comprises an electrical energy store configured to store the portion of the electrical energy released back from the inductance of each coil and the electrical energy provided to each coil of the stator teeth by the coil driver circuitry is augmented by the electrical energy stored in the electrical energy store.

A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.

A system to reduce eddy currents and the resulting losses in a synchronous motor includes at least one pick-up coil mounted to the rotor. Each pick-up coil may be located proximate a pole on the rotor. A voltage applied to the stator to control the synchronous motor includes both a fundamental component and harmonic components. The fundamental component interacts with a magnetically salient structure in each pole on the rotor to cause rotation of the rotor. The harmonic components induce a voltage in the pick-up coil. The portion of the harmonic components that induce a voltage in the pick-up coil no longer generate eddy currents within the motor. The energy harvested by the pick-up coil may also be utilized in a function other than driving the motor, such as powering a sensor mounted on the rotor.

The invention relates to a calculation method for designing reluctance systems by balancing the inner and outer system energy using the equation W=.sup.1/2Λ (Θ.sub.a.sup.2+Θ.sub.b.sup.2+2Θ.sub.aΘ.sub.b), where 2Θ.sub.aΘ.sub.b≠0, according to claim 1. The invention further relates to a computer program comprising program code means, in particular a computer program stored on a machine-readable medium, for carrying out the disclosed calculation method when the computer program is executed on a computer.

A switched reluctance motor includes a stator having an annular stator core which has teeth portions provided with poles, which are arranged in a circumferential direction of the stator core, wherein the stator core has a circular cross-sectional contour orthogonal to an axis thereof, a winding wound around the teeth portion, and a rotor having a rotor core which has salient pole portions provided with poles, which are arranged at regular intervals in a circumferential direction of the rotor core. The number of the poles with the salient pole portions is 5 poles×N, and the number of the poles with the teeth portion is 6 poles×N (The above two “N” are an equal natural number.). The salient pole portion has inclined surfaces in which both end corners in the circumferential direction are chamfered.

According to one embodiment, a rotating electrical machine includes an annular winding, a stator core, and a rotor core. At least one of the stator core and the rotor core includes a first member and a second member. The first member and the second member are formed in annular shape. The first member and the second member overlap each other in an axial direction of the shaft. The first member includes a slit-shaped first insulation section. The first insulation section extends in the axial direction. The second member includes a slit-shaped second insulation section. The second insulation section extends in the axial direction. The first member and the second member are integrally connected. The first insulation section and the second insulation section are disposed at different positions in the rotation direction.

According to one embodiment, a rotating electrical machine includes an annular winding, a stator core, and a rotor core. At least one of the stator core and the rotor core includes a first member and a second member. The first member and the second member are formed in annular shape. The first member and the second member overlap each other in an axial direction of the shaft. The first member includes a slit-shaped first insulation section. The first insulation section extends in the axial direction. The second member includes a slit-shaped second insulation section. The second insulation section extends in the axial direction. The first member and the second member are integrally connected. The first insulation section and the second insulation section are disposed at different positions in the rotation direction.

A three-phase alternating current electric motor wherein when a number of pole pairs of a rotor is P and a number of slots in which stator windings are inserted is N, N/(6P) becomes an irreducible fraction with a value of a denominator of 4 or more and wherein the relation of N>3P stands, in which the motor, for the layout of one layer of windings arranged in the slots, the UVW three-phases are arranged so as to have rotational symmetry of ±120 degrees in terms of mechanical angle from each other and, for the layout of the second layer, the windings are arranged reversed in direction by 180 degrees in electrical angle from the phases of the first layer of windings which have rotational symmetry and offset by M number of slots from the first layer, where T is a particular odd number for the relationship of 4/35≦|T−2PM/N|≦ 8/35 is given.