Abstract: A synchronous reluctance motor includes a stator and a rotor. The rotor is configured to rotate relative to the stator about a rotational axis. The rotor is spaced apart from the stator to define an air gap between the stator and the rotor and includes a rotor core defines an outermost rotor surface and an innermost rotor surface opposite the innermost rotor surface. The rotor core includes a plurality of ribs separating rotor cavities from each other and includes a plurality of rotor bridges separating the air gap and the rotor cavities. Permanent magnets are each disposed in one of the rotor cavities. The magnet surface area of the permanent magnets is less than cavity surface area of the rotor cavities. Each of the permanent magnets is adjacent to the outermost rotor surface to maximize magnetic saturation at the ribs and the rotor bridges.

Abstract: There is disclosed a fuel cell system having a motor which can be driven and generate a regenerative power by receiving the supply of a power, wherein an influence on power supply control is decreased.

Abstract: The present disclosure provides a brushless permanent magnet machine which includes an essentially circular shaped rotor, and a pair of magnets arranged in the rotor. The magnets are each U-shaped and have a thickness direction extending along a contour of the corresponding magnet between the opposite poles of the corresponding magnet, respectively. The magnets are each composed of a non-rare earth material having a lower coercivity than a rare earth material. A direction of magnetization of each of the pair of magnets is parallel to the thickness direction of the corresponding magnet. The present disclosure also provides a method of manufacturing such a brushless permanent magnet machine.

Abstract: A rotor for an interior permanent synchronous machine. A rotor core structure includes an outer cylindrical wall juxtaposed to an air gap. A plurality of arcuately-shaped cavities is formed within the rotor core structure. The plurality of arcuately-shaped cavities is substantially concentrically layered with respect to an outer cylindrical wall of the rotor core structure. Each arcuately-shaped cavity extending between first and second end sections is juxtaposed to the outer cylindrical surface wall of the rotor structure and includes an intervening center section. A plurality of permanent magnets is inserted within the plurality of arcuately-shaped cavities. Each first end section retains a respective first permanent magnet having a first magnet field strength. Each second end section retains a respective second permanent magnet having the first magnetic field strength.

Abstract: The present disclosure provides a brushless permanent magnet machine which includes an essentially circular shaped rotor, and a pair of magnets arranged in the rotor. The magnets are each U-shaped and have a thickness direction extending along a contour of the corresponding magnet between the opposite poles of the corresponding magnet, respectively. The magnets are each composed of a non-rare earth material having a lower coercivity than a rare earth material. A direction of magnetization of each of the pair of magnets is parallel to the thickness direction of the corresponding magnet. The present disclosure also provides a method of manufacturing such a brushless permanent magnet machine.

Abstract: An electric machine includes a rotor having at least one pole pair, the at least one pole pair including a first magnetic pole and a second magnetic pole having opposite polarities. The first magnetic pole may include a first inner radial permanent-magnet layer and a first outer radial permanent-magnet layer. The second magnetic pole may include a second inner radial permanent-magnet layer and a second outer radial permanent-magnet layer. An outer end of the first inner radial permanent-magnet layer and an outer end of the second inner radial permanent-magnet layer may be separated by an angle of between about 27 and about 55 electrical degrees. The electric machine may also include a stator having a stator core with an odd number of stator slots per pole pair of the rotor.

Abstract: A rotary electric machine having a stator and capable of effectively utilizing both end faces of a rotor in the rotating axis direction. The stator comprises a radial part disposed in the rotating axis direction and axial parts disposed in the radial direction. The radial part and the axial parts comprise teeth and coils. The rotor comprises a rotor shaft, a rotor core, and a magnet. The rotor core comprises a radial part and axial parts. The magnet comprises a radial part and axial parts. The radial part and the axial parts of the magnet are formed to face the radial part and the axial parts and of the stator.

Abstract: A rotor of a synchronous reluctance motor is provided. The rotor may include a laminated core including a plurality of laminated silicon steel sheets being equally divided into a plurality of regions with respect to a central portion of the plurality of silicon steel sheets. Each of the plurality of regions may include a plurality of barriers. Guide pin holes may be formed between adjacent regions so as to receive guide pins therethrough to align the plurality of silicon steel sheets and end caps provided at opposite ends thereof. Rivets may penetrate receiving holes formed at corresponding barriers in each of the respective regions so as to couple the laminated core and the end caps.

Abstract: A drive apparatus having a shortened axial dimension. First and second magnets are each formed into a semi-cylindrical shape and each provided with a magnetized pattern portion. A rotor yoke includes a shaft portion and a magnetic pole portion facing magnetized surfaces of the magnets. First and second stator yokes are each disposed to cooperate with the rotor yoke to sandwich therebetween a part of the first or second magnet where the magnetized pattern portion is formed. First and second coils each magnetize a part of the magnetic pole portion of the rotor yoke which faces the first or second stator yoke.

Abstract: An efficient and reconfigurable permanent magnet generator that comprises a permanent magnet subassembly and at least one exciter is disclosed. The permanent magnet generator may comprise a mainframe comprising at least one exciter, and a permanent magnet subassembly comprising a plurality of magnets that are arranged to form at least one air gap between facing magnetic poles in which the at least one exciter resides and that are reconfigurable for alternating current or direct current operation by inversion of respective magnetic poles. The at least one exciter may comprise a plurality of alternating layers of a first material and a second material, where the first material may comprise a superconductive material and the second material may comprise a non-superconductive material, and wherein the layers of the superconductive material are thin relative to the thickness of the layers of the non-superconductive material.

Abstract: A rotor for a permanent magnet motor of an outer rotor type having a plurality of permanent magnets and disposed around a stator includes a frame, an annular iron core combined integrally with the frame, and a plurality of insertion holes formed in the core so that the permanent magnets are inserted in the insertion holes respectively. The frame, the core and the permanent magnets are combined integrally with one another by a synthetic resin. Each insertion hole includes a magnet disposing portion in which the permanent magnet is disposed, a space portion located in at least one of circumferential both ends of each permanent magnet disposed in the magnet disposing portion, and a positioning portion positioning each permanent magnet in the magnet disposing portion, and the molten synthetic resin is poured into the space portion.

Abstract: An electrical machine comprises a stator and a rotor. The rotor is adapted to magnetically interact with the stator to promote rotation of the rotor about an axis. The rotor includes a rotor core and a plurality of magnetized arcs supported by the rotor core. The plurality of magnetized arcs defines an outermost circumference. The rotor and the plurality of magnetized arcs include a first magnetized arc, a discontinuity disposed adjacent to the first magnetized arc along the outermost circumference, a second magnetized arc disposed adjacent to the discontinuity along the outermost circumference, and a magnetization pattern of alternating magnetic poles formed on the plurality of magnetized arcs. The magnetization pattern includes a first magnetic pole skewed with respect to a second magnetic pole to form an arc of magnetization skew.

Abstract: A motor-generator system with a current control feedback loop for generating electrical energy in stationary, portable, and automotive applications. The generator includes a housing defining an interior space and including a first portion and a second portion; an electric motor assembly positioned within the first portion of the housing, and operationally coupled to a shaft member for selectively rotating the shaft member; an electric generator assembly positioned within the second portion of the housing and operationally coupled to the shaft member for converting mechanical rotation into electrical energy, the electric generator assembly including a current output for supplying electrical current; and a control assembly operationally coupled between the electric generator assembly and the electric motor assembly the control assembly providing a control current to the electric motor assembly for controlling a speed of rotation induced into the shaft member by the electric motor assembly.

Abstract: A vibration type brushless motor A1 in a structure of brushless motor having an outer rotor type core is composed of a shaft 3 of which a bottom end 3a is held by a bearing member 6 so as to rotate freely and a top end 3b is fixed to a center of rotation of a rotor yoke 1, a ring core 4 arranged around the shaft 3 and a rotor yoke 1 having a side section 1b of which a part is cut off radially to the outer circumference direction from the center fixed with the top end 3b of the shaft 3, wherein a semi-annular magnet 2 is fixed to the rotor yoke 1 along the side section 1b with facing the ring core 4.

Abstract: An electric synchronous machine with improved torque characteristic has a stator and a rotor, wherein the stator includes a winding, preferably a three-phase AC winding, with an average coil width &tgr;sp. The rotor is provided with permanent magnets and has a pole pair number of 2p with a pole pitch width &tgr;p, wherein the pitch ratio &tgr;sp/&tgr;p is ≧2.5.

Abstract: To decrease torque ripples and cogging torque, a rotor for an electrical motor, an electrical generator, or the like, includes lengths of permanent magnets embedded in a plurality of slit sections in respective layers. In an embodiment having three layers, the permanent magnets have lengths L1, L2 and L3 in order as viewed from the outside circumference side of the rotor core and generate respective total magnetic fluxes of &PHgr;1, &PHgr;2, &PHgr;3, respectively, when the rotor is assembled in a rotary electric device. The lengths have a relation L1<L2<L3, and the magnetic fluxes have a relation &PHgr;1<&PHgr;2<&PHgr;3.

Abstract: A rotor for a synchronous reluctance motor of flux barrier type and manufacturing method thereof constructs a rotor for a synchronous reluctance motor by forming a magnetic core steel plate of disc shape on which a shaft hole is formed at center part, and a plurality of flux barrier groups are formed centering around the shaft hole and automatic stacking points are formed; manufacturing a plate stacked body by stacking the core steel plates continuously using the automatic stacking points; disposing end plates on both sides of the plate stacked body; and coupling the end plates and the plate stacked body integrally with each other as inserting a coupling member into the flux barrier groups, whereby the manufacturing process can be made easy and automatic stacking of the core steel plates can be made regardless of the types such as a skew type or a non skew type, and therefore manufacturing cost is reduced and the rotor can be mass produced.

Abstract: Each permanent magnet formed in an open-letter shape is divided into a plurality of parts, the divided magnets are respectively fitted in open letter-shaped inserting portions, and ribs are respectively provided in dividing portions of the permanent magnets. Accordingly, it is possible to prevent the breakage of pole connecting portions at an outermost periphery of the rotor as adjacent inner peripheral-side permanent magnets directly come into contact with and push the outer peripheral-side permanent magnets. Alternatively, an annular nonmagnetic material is provided on an outer peripheral portion of the rotor so as to cover the open letter-shaped permanent magnets and magnetic material portions inside the open-letter portions, whereby the rotor core is made resistant against breakage, and the flux leakage is minimized.

Abstract: A motor according to the present invention is a motor using a rotor 5 including two first rotator portions 2, each having a permanent magnet 1, and a second rotator portion 3 having magnetic saliency inserted therebetween, coupled in a direction of a rotating shaft 4, and part of the rotor 5 is replaced with a reluctance motor, whereby an amount of the permanent magnet 1 is reduced, thus making it possible to reduce generated voltage. Further, there are provided the first rotator portion 2 on both sides of the second rotator portion 3, whereby the second rotator portion 3 is magnetically saturated through the effective use of going-round 18 of magnetic flux to raise salient ratio. Thus, reluctance torque caused in the second rotator portion 3 is increased, whereby it is possible to increase torque as a whole and to obtain a high-output motor.

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 permanent magnet-reluctance type rotating machine includes an annular stator having armature windings arranged on an inner periphery of the stator, a rotor rotatably arranged inside the stator and a plurality of permanent magnets disposed in a rotor core. One permanent magnet defining each pole is divided into two magnet pieces in a direction parallel to the magnetizing direction of the permanent magnets. Owing to the division of the magnet, the mass of each permanent magnet becomes small in comparison with that of the conventional machine, so that the centrifugal force applied on the magnet holes can be reduced. Consequently, the stress generating in the rotor core is decreased to allow the rotating machine to rotate at a higher speed.