Abstract: A cooling arrangement is disclosed for an electrical machine in which the main cooling air circulation within the machine is arranged using a centrifugal blower in at least one of the ends of the machine, making the main cooling air circulation flow through at least an air space in the machine and the outer surface of the stator. A circulating fan is arranged in the immediate vicinity of the centrifugal fan for the purpose of generating a coil end circulation that circulates air at least in the area of the machine's coil ends.

Abstract: A brazed joint between a cooling fluid box and an armature bar can comprise a cooling fluid box, a plurality of conductor strands, at least one side wall spacer, and at least one middle spacer. Each side wall spacer can have a tapered width and can be wedged between the plurality of conductor strands and an interior side wall of the cooling fluid box. Each middle spacer can have a tapered width and can be wedged between two columns of the conductor strands. The side wall spacers can taper in a direction opposite the taper of the middle spacers. In one embodiment, the cooling fluid box can move around the conductor strands. Each side wall spacer can be positioned against an interior surface of the cooling fluid box. Each middle spacer can be positioned between columns of conductor strands. The cooling fluid box can be withdrawn to a final position.

Abstract: A DC motor 12, has a stator housing 16 accommodating a permanent magnet stator and a rotor 15 rotatably mounted confronting the stator. The rotor 15 has a shaft 21, a rotor core 22 fitted to the shaft and having laminations forming salient poles or teeth 27. A commutator 23 is fitted to the shaft adjacent one end of the rotor core and windings 24 are wound about the teeth and terminated on segments of the commutator 23. The windings is formed by a number of coils with each coil being wound around a single tooth of the rotor and each tooth supporting a single coil. Brush gear comprising a plurality of brushes 26 in sliding contact with the commutator 23, transfers electrical power to the windings.

Abstract: A squirrel cage rotor structure used in connection with an electrical machine is formed from a high-strength, high-conductivity, and heat-treatable aluminum alloy, e.g., a T61 tempered aluminum alloy, such as A6101-T61. The resulting structure has improved strength compared to conventional pure aluminum structures, while at the same time limiting the reduction in electrical conductivity.

Abstract: The production costs of electrical machines are to be reduced. To this end, it should be possible to use standard transmitters for different axis heights of the electrical machine. The invention therefore provides a transmitter cover for an electrical machine, having a pot-like hood (11) for mounting on the electrical machine and for covering a transmitter, wherein the hood (11) has a central axis. The transmitter cover also has a mounting ring (10) which engages on the hood (11) in an interlocking manner. As a result, the hood (11) is pressed against the electrical machine in the axial direction when the mounting ring (10) is fixed to the electrical machine. This can prevent fastening screws (13) colliding with other fastening screws on the motor, this possibly being the case when only the hood (11) is used to cover the transmitter.

Abstract: An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux.

Abstract: An array 22 of water turbine assemblies 10 is positioned between two I-beams driven into the bed of a flowing water system. Each water turbine assembly 10 comprises a modular box-shaped housing 12 having an inlet and outlet for accelerating the flow of water therethrough. Turbine 14 has a ring gear 18 positioned about the periphery thereof in mechanical communication with a plurality of generators 20 for converting the kinetic energy of flowing water into electricity. Receiving means 16 are positioned and attached to the inlet and outlet of the housing 12 for collecting, concentrating, directing and accelerating water through the turbine 14 in the throat section 19 of each water turbine assembly 10. Each box-shaped modular housing 12 is structurally communicated with other housings 12 by interlocking mating surfaces 26.

Abstract: A specific condition for enhancing the power generation efficiency of an oscillation type electromagnetic power generator is disclosed. Solenoid coils constituting the oscillation type electromagnetic power generator are wound in directions opposite to each other with a predetermined coil gap therebetween. Adjacent magnets of a movable magnet are connected to each other via a spacer having a predetermined thickness in such a manner that poles with the same polarity are opposed to each other. A coil pitch which is the total dimension of the coil length of one solenoid coil and the coil gap and a magnet pitch which is the total dimension of the magnet length of one magnet of the movable magnet and the thickness of the spacer are almost equal to each other, and the coil length is shorter than the magnet length.

Abstract: A modular life extension kit is configured to extend a useful life of a support frame for a wind turbine generator. The support frame includes a support member coupled to a support cross-member. The support member has a first length, and the support cross-member has a second length. The modular life extension kit includes a plurality of plates configured to be coupled to the support frame. At least a first plate of the plurality of plates has a first side configured to be coupled to the support member and a second side configured to be coupled to the support cross-member. The first side extends at least five percent of the first length and the second side extends at least five percent of the second length.

Abstract: The present invention discloses a unit coil, a coil assembly and a coreless type linear motor. The unit coil includes bent subcoils arranged adjacent to one another and disposed on a non-acting side axially. The coil assembly includes tri-phase unit coil modules arranged in an operating direction, and the tri-phase unit coil module is composed of three identical unit coils alternately stacked and sealed by a resin layer, and the unit coil is formed by bending and stacking sub-coils. The bent sub-coils are stacked to a sufficient thickness or arranged to a sufficient width to achieve the desired driving force, and then a magnetic rail is provided to form a coreless type linear motor. In the aforementioned structure, the unit coil composed by an alternately overlapping layout method effectively reduces the required space of the coil assembly, and the sub-coils can be manufactured easily and will not be damaged easily.

Abstract: A double fed synchronous generator motor which is coupled to a reversible pump-turbine and operated while switched to a power generating operation mode or a pumping operation mode, is equipped with a controller for controlling the double fed synchronous generator motor so that power output from the double fed synchronous generator motor is coincident with an instruction value and the rotating speed is set between upper and lower limit values of the rotating speed by changing exciting current. In the power generating operation mode, the lower limit value of the rotating speed is varied by active power output from the double fed synchronous generator motor, and when the active power is small, the lower limit value of the rotating speed is set to a smaller value than that when the active power is large.

Abstract: A reciprocating vibrator able to prevent detachment of a spindle even without an outer cover, that is, a vibration linear actuator provided with a ring-shaped weight 20 having a permanent magnet 30, 31 at its inner circumference side, a first plate spring 40 fastened to a first end face 20a of this weight 20 at outer circumference side tail parts 41a, 42a, a second plate spring 50 fastened to a second end face 20b of the weight 20 at outer circumference side tail parts 51a, 52a, and a stator supporting the first and second plate springs 40, 50 and having an excitation coil 60 generating a reciprocating vibrating magnetic field with respect to the weight 20 at an inner circumference side of the permanent magnet 30, 31, wherein the stator further has a metal end plate 70 fastening the second plate spring 50 by the ring-shaped plate part 53.

Abstract: A rotary electric machine for vehicles is provided, which includes a rotor, a stator disposed opposed to the rotor, a frame made of aluminum and supporting the rotor and the stator, and a rectifier secured to an outer end face of the frame and having low-loss elements as rectifying elements. A heat insulator is disposed between the rectifier and the frame. With this configuration, deterioration can be prevented in the overall cooling properties, while at the same time the cooling properties of the rectifier can be enhanced.

Abstract: The device described herein is an Electro-magnet based Telescoping Artificial Muscle Actuator. This device uses a centrally located electromagnet which acts on permanent magnets and ferrous components housed within telescoping sections of this device. This device is intended to be linked into chains with other identical devices, with those chains then linked into bundles. This arrangement allows devices of this type to simulate the action and control mechanisms of natural muscles. This device is intended for use in prosthetic, robotic, and implantable applications.

Abstract: Split cores comprising laminated iron cores each having formed thereon a tooth, and a yoke and a pole piece which are connected to the tooth at both ends thereof, and arranged and connected together into an annular shape to make a stator. Both ends of the yokes and both ends of the pole pieces are displaced in one circumferential direction by laminated iron core from a top laminated layer of the iron cores of the split cores to a bottom laminated layer of the iron cores or split cores.

Abstract: A method and device for energy conversion from a moving fluid to electrical energy. The device includes at least one magnetic structure, at least one coil structure, a rotating component, and a rotary to linear motion conversion mechanism. The at least one coil structure includes electrically conductive material. The rotating component rotates relative to a corresponding axis of rotation in response to forces applied by the moving fluid on a structure coupled to the rotating component. The rotary to linear motion conversion mechanism is coupled to the rotating component. Rotation of the rotating component around the corresponding axis of rotation generates a relative linear displacement between the at least one magnetic structure and at least one coil in the at least one coil structure. The relative linear displacement between the at least one magnetic structure and the at least one coil generates electrical energy in the at least one coil structure.

Abstract: A method of manufacturing a stator bar in large dynamoelectric machines, with the bar insulation made of solid materials with high thermal conductivity and high dielectric strength. In the present invention, the bar insulation is provided by thermally conductive shells whose inner cavity conforms to the bar stock. The manufacturing process comprises slipping one or more thermally conductive shells at the substantially central straight portion of the bar stock, bending the ends of the bar stock to form end-arms, insulating the end-arms with tape or extrusion insulation and bonding all members to form a solid stator bar. In short, the bent end-arms are insulated by the tape or extrusion insulation while the straight portion of the bar is insulated by the thermally conductive shells. This greatly increases the effective thermal conductivity of the stator bar. The high dielectric strength of the materials significantly reduces the wall thickness of the bar insulation.

Abstract: A split stator for an electric motor includes a core having a tooth portion, a coil formed around the tooth portion, insulation spacers arranged between a surface of the tooth portion and an inner periphery of the coil, and holding the inner periphery of the coil with a space kept from the surface of the tooth portion, and a resin filler material having high thermal conductivity and filling the space. The resin filler material is configured to allow heat release from the inner periphery of coil to the core.

Abstract: A rotary electrical machine has a mechanism capable of varying an output characteristic, without increasing mechanical loss, or without consuming the electric power that does not contribute to increasing torque. The rotary electrical machine has a rotor with N pole and S pole magnets alternately and fixedly disposed thereon. An end surface, (which opposes the rotor), of each of a plurality of first teeth positioned on a first stator section is broader than that of the opposite surface thereof, and a winding is wound around a portion between both of the end surfaces. A second stator section has second teeth, corresponding the number of the first teeth, and which has no winding. The second teeth are disposed to oppose the end surfaces of the respective first teeth, and each second tooth is reciprocally movable between a reference position at which the second tooth directly opposes the respective first tooth and a maximum movable position located at the right center position between the respective end surfaces.

Abstract: A lead frame connector for windings of an electric motor, has a plurality of fixed electrical conductors embedded in overmoulding material, a plurality of spaced termination points provided through the overmoulding material for electrically connecting the motor windings to the electrical conductors, at least one access opening in the overmoulding material, and at least one terminal of one of the electrical conductors being provided at the access opening for interfacing with a motor control circuit.