Abstract: A MEMS (micro electro mechanical system) actuator with discretely controlled multiple motions comprises bottom layer, stepper plate, support, and motion plate. The multiple motion of the motion plate is generated by the electrostatically actuated stepper plates and geometrically predetermined supports. By introducing the MEMS actuator with discretely controlled multiple motions, simple motion control can be achieved by digital controlling and only single voltage is needed for motion control of the motion plate.

Abstract: A mechanical micro system comprising a flexible bending beam extending along a direction, and at least one magnetic element for creating a magnetic field. The flexible beam includes: a first circuit having a first topology for generating, in response to one current flowing through the first circuit, a force having an effect on the beam at one particular place so as to cause a first vibratory mode; a second circuit having a second topology for generating, in response to one current flowing through the second circuit, a force having an effect on the beam at one particular second position so as to cause a second vibratory mode.

Abstract: A plastics injection-molding machine is to be equipped with a more compact drive that undergoes less wear. For this purpose, it is envisaged to integrate the direct rotational drive into the direct linear drive. Accordingly, the electric linear motor has a pot-shaped external rotor (13), in the inner space of which the main part of a hollow-cylindrical stator (16) of the linear motor is arranged and which is firmly connected to the output shaft (10). The rotary drive has a stator (18), which is mounted on the inner wall of the hollow-cylindrical stator (16) of the linear motor, and a rotor, which is firmly coupled to the output shaft (10) within the stator (18) of the rotary electric motor. This direct drive produces a very compact type of construction and it is possible to dispense with easily wearing threaded spindles.

Abstract: According to the present invention, a stable operation of an actuator is realized. An actuator 1 according to the present invention includes: a movable section 5; a stationary section 10 for supporting the movable section 5; driving electrode portions 8 and 9 for driving the movable section 5; and a repulsion generation section 6 for generating a repulsion acting between the movable section 5 and the stationary section 10. The repulsion generation section 6 is provided at a position of the stationary section 10 opposing the movable section 5. At least a portion of the repulsion generation section 6 opposes an end of the movable section 5 that is located closer to the movable comb electrodes 9 than to hinges 7. By applying the same driving voltage to the movable section 5 and the repulsion generation section 6, a repulsion is generated. The repulsion acts in a direction of suppressing a rotation of the movable section 5 around an axis which is perpendicular to the planar direction of the movable section 5.

Abstract: A magnetoplastic and/or magnetoelastic material transduces linear motion, delivered to it by a mechanical connection, into a change of magnetic field, via twin boundary deformation. A bias magnetic field assures a net change of magnetization during the deformation, and a coil, coaxial with the magnetoplastic/elastic material, couples the magnetic field change to an electrical output. The bias magnetic field or a device that produces strain in a reverse direction resets the magnetomechanical transducer to its initial state. Microgenerators using the magnetoplastic/elastic material may be connected in series or parallel, combined with solar cells, and used to capture energy from passive motion such as random, cyclic or vibrational motion.

Abstract: An exemplary description provided for patent searches includes a linear electrodynamic system involving conversions between electrical power and mechanical motion uses unique magnet assemblies that move and unique stator assemblies and stator members shaped and oriented with respect to the moving magnet assemblies.

Abstract: An actuator comprises a connection section having one end rotatably connected to a connection point (C1) of a fixed section and the other end rotatably connected to a connection point (C2) of a moving section, a connection section having one end rotatably connected to a connection point (C3) of the fixed section and the other end rotatably connected to a connection point (C4) of the moving sections a comb-teeth electrode having the root section connected to a comb-teeth base point (B1) and the fore-end section extending along the turning path, and a comb-teeth electrode having the root section connected to the fixed section and the other section extending along the curve of the comb-teeth electrode and opposed to the comb-teeth electrode with a predetermined gap.

Abstract: A cooling system is provided for an electric motor having control circuitry and including a motor housing surrounding the motor. The motor drives at least one radial fan at one end thereof for directing airflow through the motor housing across the motor. A fan housing encloses the cooling fan and defines a diverter chamber radially outboard of the fan that is sized to divert a portion of the airflow away from the electric motor. A control box contains the control circuitry and includes a base having a heat sink for contacting the control circuitry. The base defines a plenum in communication with the diverter chamber and a channel in communication with the plenum and the heat sink to direct the diverted airflow across the heat sink.

Abstract: A high-efficiency thermionic energy converter comprises a multilayer vacuum diode, the layers of which are very thin and the intermediate spaces between the layers are several nanometers thick. The layers are held at a distance from each other by arranging insulator elements embedded in the layers. One of the intermediate spaces is provided with a thin, open conductive elastic foam plate which fills the spaces possibly occurring due to deformation of an upper electrode. On the cold side the distance between the layers must be so small that here the thermionically generated current is increased by tunneling of electrons from layer to layer. The partial efficiency per layer is as optimal as possible by means of the choice of the geometry and the material.

Abstract: The invention concerns a ventilation system for a rotary electrical machine of the type comprising a rotor mounted so as to rotate in a stator and a device for cooling by forced flow of a cooling fluid, such as air, provided with at least one fan fixed to the rotor and an independent fan disposed so as to be decisive for cooling at relatively low speeds of rotation of the rotor.

Abstract: There is provided a small-sized vibration generator that resonates at two different frequencies. A movable base is housed inside a case. The movable base has an installation plate, and supporting plates bent at right angles from both ends of the installation plate. A first elastically deformable portion is formed integrally with the installation plate, and a weight body is supported by the first elastically deformable portion. In the movable base, a second elastically deformable portion is provided between the installation plate and the supporting plates, and the supporting plates are fixed to supporting end plates of the case. The bending elastic modulus of the second elastically deformable portion is higher than the bending elastic modulus of the first elastically deformable portion, and resonates at two natural frequencies when a driving force is applied to the weight body by a magnetically-driven portion.

Abstract: To reduce the cogging torque of servomotors, electric power steering motors, and others, there is provided a permanent magnet motor comprising: a rotor 10 comprising a rotor yoke 11 and a plurality of permanent magnets (M1-M10); and a stator 20 comprising a stator yoke 22, salient magnetic poles 21, and armature windings 23, wherein at least one of the permanent magnets is disposed in an adjustment position that is displaced from a corresponding reference position in at least one of the circumferential, radial, and axial directions of the rotor yoke, and the plurality of permanent magnets excluding the permanent magnet disposed in the adjustment position is disposed in the reference positions, and wherein the adjustment position is set so that the permanent magnet motor in which at least one of the plurality of permanent magnets is disposed in the adjustment position has a smaller cogging torque than a permanent magnet motor in which all of the plurality of permanent magnets are disposed in the reference posi

Abstract: A linear motor assembly includes two stators extending in parallel and having salient poles arranged at a predetermined interval on opposing surfaces and a mover having three types of mover blocks. The mover blocks are made up of three-phase alternating current coils configuring magnetic poles of three phases and permanent magnets arranged in alternating polarities on two surfaces of the mover blocks opposing each of the two stators. The mover blocks are movable between the two stators along a direction in which the stators extend. A plurality of linear motors are arranged in parallel with respect to a travel direction of the movers, and the stators provided between adjacent movers are integrally formed such that they have said salient poles on the two surfaces opposing these movers.

Abstract: An electromechanical propulsion system is disclosed. The propulsion system uses magnetic propulsion and magnetic bearings to move a vehicle. The propulsion system is well suited for use on land, air, space, above water and underwater vehicles. The propulsion system includes a plurality of electromagnets that repel each other with strong and weak magnets to move the propulsion motor in linear motion. Multiple side propulsion motors can be incorporated to alter the direction of travel of the electromechanical propulsion system. The propulsion system is manufacturable in a self contained configuration where it is controllable from a remote location.

Abstract: A device includes a stage, a force applying unit configured to apply a magnetically repulsive force to the stage, the force applying unit including a first magnet provided at the stage, and a second magnet provided at an end of a movement stroke of the stage so as to face the first magnet, a driving unit configured to drive the stage within the movement stroke, a magnetic-flux reinforcement unit configured to reinforce magnetic flux of the second magnet, and a magnetic shield configured to shield the magnetic flux of the second magnet.

Abstract: An electro-mechanical actuator includes a comb drive and a deformable connector. The comb drive has a first capacitor plate and a second capacitor plate. The capacitor plates have teeth capable of inter-digitating. The deformable connector is configured to apply a mechanical restoring force to the first capacitor plate. The deformable connector is configured to restore the first capacitor plate to be at an equilibrium rest position in response to no control voltage being applied across the capacitor. The comb drive is more engaged at the equilibrium rest position than at a mechanical stability threshold of the comb drive. The capacitor plates are disengaged at the equilibrium rest position.

Abstract: A gap winding motor includes a stator and a rotor. The stator includes a stator core and air-core coils for generating a rotating magnetic field which are attached to an inner peripheral surface of the stator core. The rotor is disposed so as to face the stator with an air gap therebetween. A stator core is divided into two core portions in an axial direction of the motor, and a spacer is disposed between the core portions. A unique air-gap section is provided between the core portions, and coil terminal processes are performed in the air-gap section between the core portions.

Abstract: A thermionic converter is disclosed comprising a single or multiple hot (emitter) and cold (collector) electrodes mounted side-by-side on a single substrate and a static electrostatic field for guiding electron from the emitter to the collector. The thermal path between emitter and collector electrodes is interrupted by cuts or trenches, and electrical connections to the electrodes are routed over a meander-like, high thermal resistance pathway cut into the substrate to further reduce thermal loss. In one embodiment, there is an Avto metal surface texture of nanoscale indents on one or more of the electrodes to lower a work function. A method for fabricating the monolithic thermionic converter is further disclosed.

Abstract: In a stator coil of a rotary electric machine, a first crank portion radially shifts one side of a turn portion from the other side thereof by a first length. The one side extends to one of paired straight portions, and the other side extends to the other thereof. A second crank portion radially shifts one side of a turn portion from the other side thereof by a second length. The one side extends to one of the paired straight portions, and the other side extends to the other thereof. The first length is equivalent to a radial width of the turn portion of the first segment of each set. The second length allows the second crank portion of the second segment of each of the sets to substantially overlay the first crank portion of the first segment of each set.

Abstract: The present invention is directed to a bi-axial pivoting type actuator having a first movable section, a second movable section supporting the first movable section, and backlining. A first conductive portion and a second conductive portion for independently applying a driving voltage to each of the first movable section and the second movable section are provided on the second movable section, in a state of being split by isolation trenches and being stabilized by the backlining provided under the second movable section. By providing such backlining, mutual stabilization of the first conductive portion and the second conductive portion in an electrically isolated state, and simplification of the production steps for the actuator are realized. By providing a mirror on the first conductive portion of the actuator of the present invention as such, it becomes possible to provide a bi-axial pivoting type mirror device through a simple production process.