Abstract: An improvement in high-speed and response performances is achieved with simple structure. A bed faces a movable table on which permanent magnets divided from each other in a stroke direction of the movable table are provided. One or more armature coils are provided on the bed facing the permanent magnets. Upon passage of an electric-current through the armature coils, an electromagnetic interaction between the armature coil current and magnetic fluxes of the permanent magnets produces a thrust force for relative movement between the two mobile units. A magnetic member is provided on the movable table in a position corresponding to a maximum point or a vicinity thereof of a magnetic force of the permanent magnets when the movable table is in a neutral position in the stroke direction. When the mobile units relatively move from the neutral position, the magnetic force of the permanent magnets acts on the magnetic member.

Abstract: A rotor. The rotor includes a case, a reinforcing part, a shaft and a connecting element. The reinforcing part is formed with the case and defines an opening. The shaft extends into the opening. The connecting element connects the case and the shaft, with the reinforcing part disposed inside.

Abstract: An electric rotation machine for windmill power generation equipped with a stator slot structure having distributed windings and a rotor pole structure having permanent magnets, wherein the number of slots per pole per phase (Nspp) is undividable by 3 times P (where P is the number of poles), and pole width rate Pw obtained by dividing pole piece width Tp by pole pitch Tr at the outermost diameters of the adjoining poles of the rotor is satisfied any of Pw?0.6, 0.67?Pw?0.71, and 0.78?Pw. The distortion factors of induced voltages in a permanent magnet type electrical rotation machine, particularly for windmill power generation, can be reduced.

Abstract: A water-resistant electric motor includes a housing for receiving an electric motor armature therein and an end cap for closing an open end of the housing. The housing includes a drive shaft aperture within a cylindrical recess that receives a journal bearing and a ring seal. The end cap includes a wire access hole for receiving power supply wires. Surrounding the wire access hole is a ridge with cut-outs. A wire cover plate is seated on top of the ridge and includes cut-outs that correspond to the cut-outs in the ridge so that the power supply wires are accommodated therein when the cover plate is secured to the ridge. The wire access hole includes a grommet to seal the hole.

Abstract: A commutator comprises a commutator base of insulating material, a plurality of commutator terminals, each of which has a terminal portion and a contact portion, and a plurality of carbon segments formed on the base and over the contact portions, respectively, of the terminal. Each carbon segment has an inner portion of molded (unsintered) graphite material adjacent to the base and one or more outer exposed portions, containing or formed of sintered graphite.

Abstract: An electrical machine (10) has a built-in stator (11) which is mounted in a housing (12, 13, 14) by a built-in stator suspension, in particular in the form of a plurality of supporting rings (29) which are arranged one behind the other, at a distance apart, in the axial direction and surround the built-in stator (11), which housing (12, 13, 14) surrounds the built-in stator (11) at a distance from it, with additional apparatuses (38, 39) being provided in order to fix the housing (12, 13, 14) relative to the built-in stator (11) and with respect to the built-in stator suspension (29). In a machine such as this, the housing oscillations are minimized without any deterioration in the robustness that is required for transportation in that the fixing apparatuses (38, 39) are apparatuses which can be adjusted from outside the housing (12, 13, 14).

Abstract: An electric rotating machine comprises: a stator; a rotor that includes a rotary shaft, and rotates coaxially with the stator; a bracket supporting and fixing the stator, and supporting rotatably the rotary shaft; a rotational position detector disposed on the side opposite to the load of the rotary shaft to detect a rotational position of the rotor; and a power part including a switching element disposed on the outer circumferential side of the rotational position detector. A shield member is disposed at the rotational position detector to cover the circumference and shield a magnetic field generated by the switching element.

Abstract: A resolver external conductor fixing structure which includes a connection body having a plurality of leads, and a terminal pin holding part formed on a portion of an insulation cover for an annular stator. The terminal pin holding part and the connection body are configured to detachably engage to allow the leads to be disconnected during assembly of a resolver and connected when assembly is complete.

Abstract: When we use a new structure of stator of a motor (or generator) to let magnetic flux travel less distance in air and keep the flux pattern the same as before then we can improve its efficiency. Motor structure didn't change too much in decades. If we can greatly improve its efficiency and along with battery capacity, lessen their weight, then an electrical car may be as practical as a gasoline car. The electrical airplane may also become practical. The power plant may generate more electricity with same energy consumed.

Abstract: A magnetic coil 32 for an electrical machine is constructed from two sub-conductors 34A, 34B, each in the form of laminae of conducting material such as copper sheet, coated with an insulating material. At one end of the coil, the sub-conductors extend by different distances, to provide space at 39 for a transposition of the sub-conductors.

Abstract: Fluid bearing mechanisms (6a and 6b) are formed between a shaft (2) and a central part (21) of an oil impregnated sintered sleeve (13). The oil impregnated sintered sleeve (13) has such an inner surface formed to be larger in aperture ratio at a thrust support end (23) and a loading end (22) than at a central part (21). With this configuration, it is possible to achieve a brushless motor which can suppress an increase in bearing loss while obtaining necessary bearing stiffness at high rpm.

Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions applying a force at an outer periphery of the stator directed inwardly to cancel the pulsating components of the cogging torque.

Abstract: A turbogenerator (20) comprises a rotor (13) and a stator (14), which stator (14) has a polyphase winding, the terminals of which are arranged as generator terminals (U1, . . . ,W2) in a terminal arrangement (25) at the turbogenerator (20) to be connected to a neutral point (26) and to bus bar connections (S1, . . . ,S3). The terminal arrangement (25) is configured such that the phase sequence can be changed in a simple way by changing the connecting scheme at the terminal arrangement (25).

Abstract: A magnetic bearing assembly, either radial or linear, utilizes attractive magnetic forces between inner and outer components of the assembly. The assembly includes a mechanical device for controlling relative movement between the components in first and second directions, while permitting relative movement between them in a third direction. At least one of the components, separated by a gap, has a magnetic source for creating a magnetic field extending across the gap and causing a first load in a direction opposing gravity exerted across the gap and against that component adapted to receive a supplemental load. In this way, the attractive force urges the component adapted to receive the supplemental load upward against the mechanical device, thereby at least partially offsetting the load on the mechanical device caused by the weight of the supplemental load. Either component may be the moving component or the one adapted to receive the supplemental load.

Abstract: A rotor includes a rotor core fixedly provided on a shaft and having a hole, a magnet inserted into the hole, and a resin portion injected between the side surface of the hole and the side surface of the magnet and, the side surface of the magnet has a groove formed therein as a spread-promoting portion that promotes spread of the injected resin portion.

Abstract: A moveable object carrier is moveable in a first direction and in a second direction to be positioned in a plane. The object carrier may be moved in the first direction by a first and a second linear actuator. The first and second linear actuators are adapted to support the object carrier. Thereto the linear actuators may comprise additional bearing and the linear actuators are positioned relative to the object carrier such that no other bearing is required to prevent the object carrier from falling or tilting. The object carrier may be moved in the second direction by a third and a fourth linear actuator, which linear actuators may be adapted to support the first and the second linear actuators.

Abstract: A vibration motor includes: a rotor having an eccentric gravity center; a shaft inserted through a bearing of the rotor; a magnet provided at a position facing the rotor, at least one commutator circumferentially formed on a lower surface of the rotor; at least one pair of brushes being in contact with the commutator; a first terminal and a second terminal connected with the one pair of brushes and exposed to the external at their lower sides so as to be in contact with an electric line; and a base as a mold for fixing the first terminal and/or the second terminal thereto.

Abstract: A stator bar series loop connection is provided that is comprised of a solidified stator bar and a stranded stator bar disposed in a stator slot so that one of the bars is disposed as a top bar and the other of the bars is disposed as a bottom bar in the slot. A first side plate is brazed adjacent a first end thereof to a first side of an end of the solidified bar and adjacent a second end thereof to a first side of the stranded bar. Further, a second side plate is brazed adjacent a first end thereof to a second side of the end of the solidified bar and adjacent a second end thereof to a second side of the stranded bar. Accordingly, the stranded bar is series connected to the solidified bar.

Abstract: A generator hub adapter is disclosed that is for use on a bicycle generator hub. The generator hub adaptor includes a mounting portion and a contact terminal. The mounting portion has a contact surface dimensioned and arranged to contact an axial outer face of a nut member of the generator hub. The mounting portion is electrically connectable to the nut member and easily mounted on a hub axle supporting the generator hub. The contact terminal is formed integrally with the mounting portion and provides a simple means for completing an electrical circuit without modification to a bicycle frame or the generator hub.

Abstract: A brush card assembly 10 includes a brush card member 12, conductive contacts 14 provided on the brush card member, and brushes 16 mounted to be electrically in contact with the conductive contacts. The assembly 10 also includes brush box 18 associated with each of the brushes. Each brush box includes an integral spring 24 constructed and arranged to bias an associated brush to contact a commutator, and an integral retainer 26 constructed and arranged to exert pressure on the associated brush once the brush is disengaged from the commutator.