Abstract: An explosion-proof actuator assembly includes an explosion-proof housing, a motor, motor control electronics, and an actuator. The housing has at least one inner cavity and at least one exit path comprising an explosion-proof flame path. The motor is disposed within the housing. The motor control electronics communicate with the motor and are disposed within the housing. The actuator is carried by the housing, communicates with the motor, and is configured for movement relative to the housing responsive to actuation of the motor.

Abstract: A single phase, three-speed Pole-changing electric motor has a stator and a rotor rotatably mounted within the stator. The stator includes a core having a plurality of slots, and a plurality of windings in the slots for operating at least three speeds. The windings are configured and arranged so that a substantial portion of the windings used in operating at one speed are used in operating at another speed. The reconnection of windings for different speeds is simple and easy to implement, for example with an external timer, switch, or relay.

Abstract: A controller for a starter/generator used with an aircraft engine, includes means for monitoring field return current in a generator field winding; means for monitoring generator voltage; and microprocessor control means for adjusting generator field current as a function of the field current and voltage and field return current. The field return current and output voltage monitoring functions allow for open field, field integrity, over voltage, field weakening and torque limiting functions to be realized in an integrated programmable system configuration.

Abstract: The invention concerns a starter/generator for an internal combustion engine (1), especially that of a motor vehicle, with an electric rotary-field machine (4), which exercises the starter and generator function; and at least one invertor (17) for generating the voltages and/or currents of variable frequency, amplitude and/or phase required for the magnetic fields of the electric machine (4); wherein the electric machine (4) starts the internal combustion engine (1) by merging in from standstill.

Abstract: An adjustable speed gas turbine power generation apparatus can maintain a rated output of the gas turbine generation apparatus irrespective of ambient temperature change. For this purpose, the rotational speed of the secondary winding of the generator is controlled by the gas turbine and alternating current excitation of the secondary winding is determined on the basis of the ambient temperature. The sucked air quantity (flow rate by weight) in the compressor can be increased by increasing the rotational speed of the gas turbine when the ambient temperature increases, so that an output from the gas turbine becomes nearly the rated output, while maintaining the desired frequency at the primary winding.

Abstract: A power device including a magneto and a rectification circuit for rectifying an output of the magneto is provided which is capable of adjusting an output of the magneto without any specific control circuit. A field adjusting excitation coil is arranged on a side of a stator of the magneto so as to generate a field adjusting magnetic flux when it is excited, resulting in a magnet field of the magneto being varied by means of the magnetic flux. The field adjusting excitation coil is connected to an intermediate portion of a current flow circuit for a load current, to thereby be excited by the load current, so that a magnet field of a rotor of the magneto is varied depending on the load current, leading to adjustment of an output of the magneto.

Abstract: A motor includes a rotor including a permanent magnet circumferentially equally divided and alternately magnetized to different poles into a cylindrical shape. A first coil and a second coil are displayed inside and axially of the rotor. First outer magnetic poles and first inner magnetic poles are excited by the first coil and are opposed to the outer peripheral surface and inner peripheral surface of the rotor, respectively. Second outer magnetic poles and second inner magnetic poles excited by the second coil are opposed to the outer peripheral surface and inner peripheral surface of the rotor, respectively. The first inner magnetic poles and the second inner magnetic poles are located between the first coil and the second coil, to thereby make the opposed area of the outer magnetic poles, the inner magnetic poles and the magnet large and provide a super-compact motor of a high output and high efficiency.

Abstract: The invention relates to the utilisation of a decommissioned power station or industrial chimney (1) made of concrete as a tower for a wind converter (2) with a high electrical output with a rotor with a substantially horizontally arranged rotor axis (20), on whose point rotor vanes (9) are located in a flying manner, after shortening by a degree determinable on the basis of static and dynamic conditions, and attachment of securing means, upon which the wind converter is rotated eccentrically to and with a degree of rotational freedom about the vertical axis of the chimney, into the respectively optimum wind direction.Alternatively, a steel base (6, 7, 12, 16) may be set on the thus shortened chimney in order to mount the wind converter, in such a way that the rotor vanes can pass the chimney at a predeterminable spacing. (FIG.

Abstract: A brushless DC motor, having a rotor with a cylindrical rotor magnet supported rotationally by a shaft held by bearings mounted on a substantially planar base plate, and a stator supported by the base plate, and including a plurality of radially spaced salient poles holding stator coils formed by windings of magnet wire. Opposing surfaces of the rotor and each salient pole are defined by a first surface of a magnetic core of the salient pole, which is received in a bobbin, and a second surface of the magnetic core orthogonal to the first surface, and the rotor magnet has permanent magnet poles forming a first surface opposing the first surface of the magnetic core, and a second surface opposing the second surface of the magnetic core. A tip of each magnetic core is received through a hole formed in the base plate.

Abstract: A power generator system, including an inductive generator for producing a generator electrical signal. The inductive generator contains electrically conductive stator field coil windings and an electrically conductive ferromagnetic disk-shaped rotor. The inductive generator is configured for under-the-hood installation and includes an input crankshaft for being externally driven by a motor vehicle engine. The generator is electrically coupled to an electronic control unit which responds to amplitude and frequency variation of the electrical signal, due to fluctuations in vehicle engine speed, and produces an output power signal having substantially constant voltage, substantially constant frequency, and at least one phase.

Abstract: A method and apparatus for power conditioning and for storing electrical energy, fossil fuel energy, or both in the form of a compressed gas which may then be used in combination with a fossil fuel to generate conditioned electrical power is disclosed. The present invention provides a method wherein the energy so stored is used as a back-up power source to assure uninterrupted conditioned electrical power in the event of a failure of a primary electrical power source. Turbine rotors are maintained in rotation to provide a spinning reserve in that the inertia of the turbines can be used to generate power in the event of minor power disruptions, and the turbines can be powered for producing power in the event of greater power disruptions.

Abstract: A digital image printer that performs certain digital image processing functions using parallel integrated circuitry and other functions using serial integrated circuitry in an effort to minimize integrated circuit real estate. The serial integrated circuitry is allocated to certain functions within digital image printing system that perform various mechanical operations. The inherent mechanical time constant of these mechanical operations, when compared to electrical digital image processing operations performed using modern integrated circuitry, is relatively long. In other words, the mechanical operations are performed in a relatively longer time than is made possible using modern integrated circuitry and processors employed within digital image printing systems. The present invention dedicates certain of the functions used to perform digital image processing to be performed using slower, serial integrated circuitry.

Abstract: An apparatus for generating electricity from aeolian oscilaltions caused by the flow of a fluid such as wind or water. An immobile beam extends between two piers, and a movable vane is disposed around the beam in parallel relation thereto. The vane is generally tubular, having a generally cylindrical or foil-shaped cross section. The movement of a fluid, such as wind or deep ocean tidal flow, past the vane induces aeolian oscillation in the vane, so that the vane moves to-and-fro, with respect to the beam, in a direction generally perpendicular to the direction of fluid flow. Rods and a crankshaft may connect the vane to a generator mounted upon the beam, so that the movement of the vane is converted into electricity. Alternatively, electricity can be generated from the movement of the vane by a field coil on the vane inducing electrical current in induction wires mounted upon the immobile beam.

Abstract: A device such as an electric motor, an electric generator, or a regenerative electric motor includes a rotor arrangement and a stator arrangement. The stator arrangement has a dielectric electromagnet housing and at least one energizable electromagnet assembly including an overall amorphous metal magnetic core. The overall amorphous metal magnetic core is made up of a plurality of individually formed amorphous metal core pieces. The dielectric electromagnet housing has core piece openings formed into the electromagnet housing for holding the individually formed amorphous metal core pieces in positions adjacent to one another so as to form the overall amorphous metal magnetic core. The device further includes a control arrangement that is able to variably control the activation and deactivation of the electromagnet using any combination of a plurality of activation and deactivation parameters in order to control the speed, efficiency, torque, and power of the device.

Abstract: A synchronous machine, in particular a motor for a motor vehicle has an excitation system composed of a plurality of electrically excited individual poles in a stator or a rotor, preferably formed as claw poles excited by at least one joint excitation coil, wherein for compensation of a magnetic stray flux in the intermediate spaces between the mutually oriented and alternatingly nested claw poles, the permanent magnets are inserted on the pole plates on the ends of the stator or rotor, so as to facilitate and simplify the insertion of the permanent magnets required for compensation of the stray flux and to improve their compensation action.

Abstract: A voltage controller for a three-phase generator is disclosed in which the phase voltage of the generator is evaluated. This phase voltage is evaluated with the aid of a window comparator with variable thresholds. Via a VCL signal, which switches over each time a threshold adaptation occurs, a frequency-dependent signal can be generated that can be evaluated as a measure for the generator rpm.

Abstract: An improved three-phase bridge inverter DC link converter power circuit for a portable generator, preferably the generator system described in U.S. Pat. No. 5,625,276 to Scott et al. Dual voltage and variable frequency inverter designs and improved converter designs are disclosed. Embodiments of the present invention avoid a capacitor induced center voltage drift problem found in certain prior art inverter designs.

Abstract: A support system for an electric generator having a tapered spring bar connected between the stator core and stator frame, where the spring bar has a continuously tapered cross-sectional area along its length. The tapered cross-section provides a larger cross-sectional area at points having high bending moment and a smaller cross-sectional area at points having low bending moment. By eliminating material in areas of low bending force, a robust support system having increased flexibility is provided. The spring bar may further be formed from a plurality of thinner laminations, thereby providing the support system designer with an additional degree of flexibility for independently controlling the natural frequency of the supports in the radial and tangential directions.

Abstract: An electrostatic actuator and a method for actuating a micro-machine structure. The micro-machine structure has a stationary part and a movable part that is relatively movable between a rest position and an activated position and is resiliently connected to the stationary part. The stationary part and the movable part form a flexible sub-structure having a resonant frequency. The actuator comprises a first electrode disposed on the stationary part and a second electrode disposed on the movable part. The actuator also includes a wave generator, connected to the first electrode and the second electrode, for generating an alternating voltage signal to the first electrode and a reference voltage signal to the second electrode so as to impart an electrostatic force between the stationary and movable parts and to move the movable part from the rest position to the activated position. The electrostatic force for fixed amplitude wave has a constant force component and a vibratory force component.

Abstract: A wave energy converter includes a buoyant body (11) and an acceleration tube (14) dependent from and attached to the buoyant body (11) and having an upper end near the buoyant body and a lower end remote from the buoyant body. A section of the acceleration tube intermediate the upper and lower ends of the acceleration tube defines a working cylinder (16) and openings in the acceleration tube (14) above and below the working cylinder (16) allow substantially unobstructed water flow between the working cylinder and a body of water in which the acceleration tube is immersed. A working piston (17) is reciprocable in the working cylinder. An energy-absorbing device (18, 19, S) includes paired resiliently extendable hose pumps (18, 19) operated by the working piston (17). One end of each hose pump within a pair is attached to the operating piston (17) on opposite sides thereof, and the other end is anchored to the unit which consists of the buoyant body (11) and the acceleration tube (14).