Abstract: A permanent magnet element intended especially for electrotechnical devices and an electric machine, the element (1) comprising at least one permanent magnet piece (10). The permanent magnet element (1) also comprises a protective cover (11) that is arranged to partly surround the permanent magnet pieces (10) arranged in the element, and the permanent magnet element (1) also comprises one or more fastening elements (13; 21).

Abstract: A plurality of embodiments of rotating electrical machines having improved arrangements for securing plate type permanent magnets to a cylindrical surface of one component of the machine in facing relation to another relatively rotatable component thereof with a small gap therebetween. The magnets are secured by embedding them in a bonding material surrounding the peripheral edges of the magnets and at least a portion of the sides thereof facing the gap and leaving an area of said sides directly exposed to the gap to maintain good electrical properties and machine performance without necessitating an increase in the gap.

Abstract: The present invention relates to a permanent magnet rotor permanent magnet positioning and retaining device comprising a sleeve, a rotor iron core properly provided therein, a plurality of arc-shaped permanent magnets of alternation poles disposed between the sleeve and the rotor, a plurality of near triangle-shaped regions between two adjacent permanent magnets being formed by cutting off the outer perimeter corners of two adjacent permanent magnets, wherein said rotor iron core further comprises a plurality of circumferentially provided grooves for separating two arc-shaped permanent magnets of alternating poles and a plurality of dividers, each being provided between two arc-shaped permanent magnets of alternating poles; said divider, between the rotor iron core and the sleeve, further comprises a base being engaged with a groove so that the dividers are secured to the rotor iron core, a trunk capable of filling the gap between two adjacent permanent magnets to prevent said permanent magnets from moving in

Abstract: A rotor for an electric rotary machine having signal generating inductor magnetic poles provided on a periphery thereof comprising a cup-like rotor yoke having a peripheral wall and a bottom wall and an inductor forming member mounted on the peripheral wall of the cup-like yoke and including a ring-like portion fitted onto the peripheral wall of the rotor yoke and having the inductor magnetic poles formed thereon and securely mounted on the rotor yoke by forcing protrusions formed on the peripheral wall of the rotor yoke against the both axial ends of the ring-like portion.

Abstract: An exhaust device includes a housing, a drive unit, and an electric generator. The housing includes a tubular wall with a tube axis, and a mounting wall transverse to the tube axis. The tubular wall has an inlet end portion to be connected to a source of exhaust gas. The housing is formed with a vent for discharging the exhaust gas. The drive unit includes a drive shaft disposed in the housing, and an impeller connected to the drive shaft such that the exhaust gas received from the source can drive rotation of the drive shaft. The electric generator includes a stator mounted on the mounting wall, and a rotor coupled to the drive shaft such that the rotor is rotatable with the drive shaft relative to the stator to generate electricity for operating a load, such as a lamp unit.

Abstract: The invention provides an electromagnetic reciprocal drive mechanism having a movable part that is simple to manufacture, dimensionally stable and inexpensive. The device has; a permanent magnet cluster 3, and a spider 4 and retainer 5 that concentrically support the permanent magnet cluster 3, an outer laminated core 6 provided adjacent to the permanent magnet cluster 3, and an electromagnetic coil 8 wound around the outer laminated core 6. An adhesive paper sheet 13 having an adhesive layer 11 on an inner surface and which can be impregnated with an adhesive 12 is wrapped around an outer periphery of the permanent magnet cluster 3, the spider 4 and the retainer 5. The adhesive 12 is then impregnated into the adhesive paper sheet 13 and solidified. In the adhesive paper sheet 13 and the adhesive layer 11 is formed of a plurality of small holes.

Abstract: A motor rotor containing a permanent magnet being covered with a synthetic resin tube. The synthetic tube is shrunk by heating to coat the permanent magnet. The permanent magnet is protected by the synthetic resin.

Abstract: In a permanent magnet rotor, a power transmitting shaft is connected to an axial end of a solid cylindrical permanent magnet, and a reinforcement sleeve is fitted on the outer circumferential surface of the permanent magnet. Thus, the shaft is not required to be passed through the permanent magnet as was the case with the conventional permanent magnet rotor for the purpose of transmitting the rotational torque and increasing the overall rigidity, and the increase in the axial dimension of the rotor due to the reduction in the cross sectional area of the permanent magnet can be avoided. Also, because the sleeve surrounds the permanent magnet, the resistance to centrifugal stress resulting from a high speed rotation and repeated bending stress owing to vibrations can be improved.

Abstract: For achieving a constant capacity range by way of field weakening of a permanent magnet excited drive the magnetic transverse resistance (Rm) of the rotor plate pack is increased by pole gaps (P1, P2), which are produced by milling into the upper surface (O) of the rotor plate section (L), or are punched into the rotor plate section (L), whereby a covering of the poles of Tp in the range of from 70% to 80% has been shown to be particularly advantageous.

Abstract: Encapsulation of a permanent magnet rotor is achieved by applying a glass roving material to spaces in the rotor structure, applying a veil cloth around the outer surface of the rotor, mounting a vacuum bag with vacuum ports around the outer surface of the rotor, removing vent plugs from the end walls of the rotor and screws from an inner ring of the rotor and replacing them with vacuum ports and applying a vacuum to the vacuum ports. After air has been removed from the rotor, an encapsulating resin is applied to some of the ports to introduce resin into the interior of the rotor. After curing of the resin the vacuum bag is removed and the outer surface of the rotor is machined to the desired outer dimension of the rotor.

Abstract: A magnet machine includes a magnet rotor. The rotor includes a sleeve and a magnet. The magnet is positioned within the sleeve. A highly electrically conductive, nonmagnetic shield surrounds the magnet. The shield reduces rotor eddy current losses and lowers rotor operating temperature, thereby improving efficiency of the machine.

Abstract: The present invention refers to a rotor assembly for an electric motor which has a rotor shaft and at least one permanent magnet arranged on the rotor shaft, the rotor shaft having the permanent magnet arranged thereon being housed in a sleeve and the rotor shaft being free to rotate within the sleeve.

Abstract: A rotary electric machine for a vehicle has a rotor with a rotor shaft, a pair of rotor cores, a field winding and an annular core made of a stack of core sheets. The rotor core has a boss, a disc portion and a cylindrical part. The cylindrical part is connected with the disc portion and is continuous along the rotor shaft. The cylindrical part is formed with projections and recesses which are disposed alternately in a circumferential direction on the outer periphery thereof. Permanent magnets may be disposed in the recesses. The annular core is connected with outer peripheries of the projections of the cylindrical parts. By adopting the cylindrical parts and the annular core, diameter of the boss is enlarged.

Abstract: A circumferential confronting type motor includes an armature core that has drive coils wound around its plurality of poles, and a drive magnet positioned opposite to the armature core in the radial direction. The drive magnet has a plurality of divided magnetized sections, each with a magnetic center, formed separated from each other in the axial direction by a non-magnetized section. The magnetic centers of the respective plurality of divided magnetized sections are provided in symmetrical positions with respect to a magnetic center in the axial direction of the armature core. Further, electromagnetic action between the drive magnet and the armature core causes the two to rotate relatively, while magnetic action between the plurality of divided magnetized sections and the armature core regulates their relative movements in the axial direction.

Abstract: A hybrid synchronous machine includes a cylindrical element having slots; excitation windings situated in at least some of the slots; and permanent magnets situated in at least some of the slots, the permanent magnets comprising radially magnetized permanent magnets.

Abstract: In order to detect the angular position of a permanent magnet rotor (13) of a brushless motor, measuring means are connected to the windings of the stator in such a way as to form an oscillatory circuit and the variations in the frequency of resonance as a function of the position of rotor are measured. In order to augment these variations, the rotor has a non-magnetic structure (26) around the magnet (14) with zones of different thicknesses or of different permeabilities. This structure can be formed by a metal sleeve, of brass for example, having openings or recesses (44) which can be filled with a dielectric material.

Abstract: The alternator rotor includes a polygonal shaped rotating core defining a plurality of flat faces. A plurality of polygonal shaped permanent magnets cooperate with the flat faces of the core. The permanent magnets form voids between adjacent permanent magnets. A plurality of titanium or titanium alloy filler pieces is positioned, respectively, in the voids created between adjacent permanent magnets. A compressive outer sleeve encloses the core, permanent magnets, and titanium filler pieces to form the alternator rotor.

Abstract: A very high speed permanent magnet type electric rotating machine, in which loss generated on a rotor is small to achieve high efficiency on an air generating source even when driven by an inverter operating at a fundamental frequency of at least several hundreds of Hz and in which a reactor is inserted between the inverter and a permanent magnet type synchronous motor, and content percentages of components of harmonic current supplied to the permanent magnet type synchronous motor are adjusted such that when a content percentage of a fundamental wave is 100%, a content percentage B of a seventh order component is at most 10% and a total content percentage is made equal to or less than a certain value so as to satisfy the relationship (A<C<B) where A is a content percentage of a fifth order component, B is a content percentage of a seventh order component thereof, and C is a content percentage of a ninth order component thereof, thereby enabling realizing a very high speed permanent magnet type electric

Abstract: A rotary electrical machine (1) has at least one stator (23). The stator is provided with at least one radial channel (107) for ducting cooling air. The channel (107) extends between a first position (113) at or substantially near the rim (109) of a winding region of the stator (23) and a second position (119) at or substantially near the center (51) of the winding region. The machine (1) has cooling means (91-97) for causing cooling air to enter the radial channel (107) via the second position (119) and exit via the first position (113). The stator may have electrical windings arranged as coil sectors (183-197) disposed substantially equi-angularly in a generally circular pattern. At least some of the coil sectors are wound in a generally spiral fashion when viewed axially. A rotor (13), for the machine may have a plurality of equi-angularly spaced magnets (127), which are generally circular but with a cut-away portion, when viewed axially.

Abstract: The present invention relates to a permanent magnet rotor permanent magnet positioning and retaining device comprising a sleeve, a rotor iron core properly provided therein, a plurality of arc-shaped permanent magnets of alternation poles disposed between the sleeve and the rotor, a plurality of near triangle-shaped regions between two adjacent permanent magnets being formed by cutting off the outer perimeter corners of two adjacent permanent magnets, wherein said rotor iron core further comprises a plurality of circumferentially provided grooves for separating two arc-shaped permanent magnets of alternating poles and a plurality of dividers, each being provided between two arc-shaped permanent magnets of alternating poles; said divider, between the rotor iron core and the sleeve, further comprises a base being engaged with a groove so that the dividers are secured to the rotor iron core, a trunk capable of filling the gap between two adjacent permanent magnets to prevent said permanent magnets from moving in

Abstract: In an ultra-permanent-magnet-type electric rotating machine including a stator in which a winding of armatures is wound in each of a plurality of slots of a stator core, and a rotor having permanent magnets respectively inserted into permanent-magnet-inserting holes in a magnetic steel sheet ring provided at an outer periphery of a conductive and magnetic shaft, the thickness of the stator core is 0.1 to 0.2 mm, and the magnetic steel sheet ring is made of a high-tensile-strength magnetic steel sheet had tensile strength of 80 kg/mm2 or more.

Abstract: In an electric motor, in particular a commutator motor, with a magnet body (24) disposed on a rotor shaft (12) in manner fixed against relative rotation for scanning the revolution and/or rpm, which magnet body has a carrier ring (26), seated with a press fit on the rotor shaft (12), and a multi-pole ring magnet (27) received by the carrier ring, in order to produce the carrier ring of metal for the sake of greater axial force transmission to the rotor shaft (12), the carrier ring (26) is embodied with a first annular portion for the press fit and with a second annular portion (262), adjacent to it in the axial direction, that has an inside diameter for receiving the ring magnet (27) that is greater than the outside diameter of the rotor shaft (12). As a result, the stresses caused by the press fit are not transmitted to the ring magnet (27), which is fragile (FIG. 1).

Abstract: An electric motor rotor with permanent magnets, the rotor including magnets (20) seated against a cylindrical lateral surface (11) of the core (10) of the rotor and a pair of annular caps (40), each cap being seated and affixed to an adjacent end face (12) of the core (10), the annular caps (40) limiting axial displacements of the magnets and defining, for both directions of circumferential displacement, stops for this displacement for each magnet (20), the confronting lateral edges (21) of a pair of consecutive magnets (20) being positioned by the annular caps (40), in order to define a previously established minimum circumferential distance.

Abstract: A rotor for an electric rotary machine having signal generating inductor magnetic poles provided on a periphery thereof comprising a cup-like rotor yoke having a peripheral wall and a bottom wall and an inductor forming member mounted on the peripheral wall of the cup-like yoke and including a ring-like portion fitted onto the peripheral wall of the rotor yoke and having the inductor magnetic poles formed thereon and securely mounted on the rotor yoke by forcing protrusions formed on the peripheral wall of the rotor yoke against the both axial ends of the ring-like portion.

Abstract: A rotor (11) for a synchronous motor is provided with a plurality of magnets (15) being substantially V-shaped in cross-section. The V-shaped cross-section is defined by an inner V-surface (25), an outer V-surface (19) and an outward face (23) facing outwardly. A first angle &agr; is subtended between a first straight line connecting a point of intersection (31) of the outer V-surface (19) and the outward face (23) and a second straight line connecting the center (35) of the rotor (11) and the acute angle point (27). A second angle &bgr; is subtended between the first straight line and a third straight line connecting a point of intersection (33) of the inner V-surface (25) and the outward face (23). By setting the angle &bgr;, to be larger than 20 percent of the angle &agr;, leakage flux at both ends of the magnets (15) is reduced.