Abstract: A wind turbine, having: a rotatable frame; a plurality of airfoils mounted to the rotatable frame, the wherein the airfoils extend parallel to an axis of rotation of the rotatable frame, and wherein the airfoils are individually pivotable with respect to the rotatable frame; and a mechanism that holds each of the airfoils in a high lift/high drag position when the airfoil moves in a direction of air flow. The wind turbine may optionally include a rotational stop to prevent rotation of the air foil from a high drag position to a low drag position when the airfoil is moving in the direction of the wind flow.

Abstract: The invention concerns a wind turbine comprising a vertical tower with a yaw bearing, a nacelle on top of the yaw bearing, a hub with blades rotatable around a more or less horizontal rotation axis. The nacelle has a generator and a control room, whereby the generator comprises a rotor with a rotor shaft supported on two rotor bearings carrying the hub, and a stator comprising a cylindrical outer shell with a stator diameter that is approximately equal to the diameter of the nacelle and which outer shell has at its ends a front cover plate and a back cover plate each with a rotor bearing for supporting the rotor shaft. In accordance with the invention the rotor shaft is hollow and the hollow hub is accessible from the control room through the hollow rotor shaft.

Abstract: A wind power generating device includes a housing, a transmission unit, at least one winding disc, at least one magnetic disc, and a rotating unit. When there are a plurality of winding discs and a plurality of magnetic discs, the winding discs and the magnetic discs are axially spaced and alternately arranged in the housing behind the transmission unit. When the magnetic discs are directly rotated by the rotating unit and the winding discs are indirectly rotated by the rotating unit via the transmission unit, magnetic bodies on the magnetic discs and windings on the winding discs are quickly moved in a relative motion to produce relatively large flux change, enabling the wind power generating device to have increased power generation capacity.

Abstract: A method and system of producing electrical energy by a moving vehicle. Moving air would be introduced to the vehicle provided with a generator for producing electricity. This electricity would be transmitted to one or more storage batteries connected between the generator and the vehicle's motor. Once sufficient energy is stored in the storage batteries, the vehicle would proceed to a facility for transferring the stored electricity in the storage batteries to batteries or other storage devices provided at the facility. The vehicle's owner would then receive remuneration or credit based upon the amount of energy transferred.

Abstract: When drive control of a generator is performed, PWM control of a switching circuit comprising an FET and a diode connected to the opposite ends of a winding is performed. In the vicinity of a moment in time Lmax where the winding has a maximum inductance L, an alternating mode for repeating a supply mode and a reflux mode alternately is performed through PWM control. After the alternating mode is performed, the reflux mode is performed temporarily in order to increase the quantity of current, and then a regenerative mode is performed. The regenerative mode is performed by increasing the current level as much as possible when the reflux mode is started while suppressing the brake force of the rotor in the alternating mode. From a position advancing in angle by a time Tah from the moment in time Lmax where the winding has a maximum inductance L, a first alternating mode C1 for repeating the supply mode P and the reflux mode Q alternately is performed.

Abstract: A control apparatus for a vehicular AC generator analyzes, at least, a “HIGH” logic continuation time, a “LOW” logic continuation time and the pulse width duty of an external signal, for the external signal pulse inputted from an external unit. In a case where the “HIGH” logic or “LOW” logic of the external signal pulse has continued for a predetermined time period, the control apparatus controls a generator control voltage as either of adjustment voltages consisting of the two values of an ordinary voltage and a voltage lower than the ordinary voltage. On the other hand, in a case where the “HIGH” logic or “LOW” logic of the external signal pulses are iterated within a predetermined time period, and where the pulse width duty of the external signal falls within a predetermined range, the control apparatus controls the generator control voltage as a multistage or linear adjustment voltage which is the function of the pulse width duty ratio.

Abstract: This invention relates to a magnet assembly that includes a ferromagnetic member extending in a first direction, an array of magnetized poles of opposite polarity arranged adjacent to each other in the first direction and mounted on the ferromagnetic member, wherein a magnetized pole of the array of magnetized poles includes a plurality of permanent magnets arranged to generate a diverging magnetic field towards the ferromagnetic member. In the magnet assembly, each permanent magnet of the magnetized pole has a magnetic polarization having a non-zero component in the first direction and a non-zero component in a second direction substantially perpendicular to the first direction.

Abstract: The stator of the vehicle-mounted alternator includes a stator core formed with a plurality of slots located along a circumferential direction thereof, and first and second multi-phase windings wound in the slots, the first and second multi-phase windings being spaced from each other by a predetermined electrical angle. An output of the first multi-phase winding is rectified by a first rectifier device, and an output of the second multi-phase winding is rectified by a second rectifier device. The second rectifier device is constituted by a plurality of switching devices. The vehicle-mounted alternator includes a control device to perform on/off control on the switching devices such that a phase angle difference between an output of the first rectifier device and an output of the second rectifier device is varied depending on a rotation speed of the stator.

Abstract: In a wind power generation installation comprising a rotor with rotor blades mounted on a tower and connected via a transmission to a generator for generating electric power, an electric machine operable as a motor is also connected to the transmission for applying a driving torque to the transmission so as to bias the transmission so as to hold the gears of the transmission in constant engagement in order to prevent the detrimental effects of torque variations on the gears of the transmission.

Abstract: This device is A Specially Improved Automotive Replacement Voltage Regulator for use in the automotive components remanufacturing and original equipment alternator product. Particularly this device has additional transient suppression means for the loads; “high side drive” of the rotor field to eliminate corrosion from the low side short condition; full passivation around the monolithic chip; and a monolithic chip that contains both the power and control devices which permits a simplified heat sink for thermal dissipation.

Abstract: An arrangement for electrically powering an aircraft comprises at least one first generator driven by an engine of the aircraft, an electricity network on board the aircraft receiving the voltage produced by the first generator, at least one second generator driven by the motor, and an engine electrical network distinct from the on-board network for powering equipment of the engine of its environment, the engine network comprising: at least one DC electrical voltage distribution bus for the electrical equipment; and a power supply circuit having a first input connected to the on-board network, a second input connected to the second generator to receive the electrical voltage supplied thereby, a voltage converter connected to the second input, and a selector circuit for delivering a voltage on the distribution bus, the voltage being supplied from that received on the first input or from that supplied by the converter depending on the amplitude of the voltage supplied by the second electricity generator.

Abstract: In a control system for controlling a power generator based on a command value associated with a control parameter, a receiver receives the command signal, a detector detects the command value included in the received command signal, and a determiner determines whether a duration of the detected command value being invariant within a predetermined range exceeds a predetermined allowed duration. In the control system, a controller controls an output of the power-generator based on a predetermined default value within the predetermined range in place of the command value when it is determined that the duration of the detected command value being invariant within the predetermined range exceeds the predetermined allowed duration.

Abstract: Compensator device, for the stabilisation of electromechanical oscillations destined to provide a reference signal to a voltage regulator device of a synchronous alternator for the delivery of electrical power to a distribution network, said device including: first processing means to receive electrical measurement signals representing operative parameters characteristics of said synchronous alternator and/or to generate an electrical signal to be controlled; and a first electrical signal corresponding to a sliding surface of a control of the “sliding modes” type, second processing means of the first signal to generate the reference signal so that it has a first order “sliding modes” profile.

Abstract: There is provided a method of operating a wind power installation. Under first operating conditions in a normal operating mode the wind power installation delivers a first power to a connected electrical network. That first power is proportional to the wind speed. The wind power installation is controlled in such a way that upon the occurrence of a disturbance it remains on the connected electrical network and delivers to the connected electrical network a second power which is lower than the first power. Upon cessation of the disturbance and under the first operating conditions a third power is briefly delivered to the connected electrical network, the third power being significantly higher than the first power.

Abstract: A bicycle electric power device includes a dynamo, an electrical device, a power source and a switch. The electrical device is electrically connected to the dynamo. The power source is electrically connected to the dynamo in parallel with the electrical device and configured to chargeably connect to the dynamo. The switch is connected in series with the power source and configured to controllably connect the power source to the dynamo with the dynamo producing no power of its own such that with the switch closed the dynamo is charged by the power source and with the switch opened the dynamo provides boosted voltage to the bicycle electrical device.

Abstract: An electromechanical power transfer system that transfers power between a prime mover and a direct current (DC) electrical power system, comprises: a permanent magnet machine (PMM) that has a permanent magnet (PM) rotor coupled to the prime mover, a stator with a multiphase alternating current (AC) winding coupled to an AC bus and a control coil with a winding that has a configuration to generate a magnetic field with flux that varies the reactance of the stator winding with the application of control coil current; a control coil current regulator system to regulate the control coil current; wherein the control coil current regulator system generates a level of the control coil current that regulates current in the stator to a desired level in response to a control coil current feedback loop that comprises a control coil current signal and a DC bus potential feedback loop that comprises a DC potential feedback signal and in a generating mode the main active rectifier system maintains a constant potential on t

Abstract: According to one example a linear translation stage is provided. The linear stage includes a first portion (e.g., a base portion) and a second portion (e.g., a stage portion) configured for relative translation with respect to each other. One of the first portion or the second portion has a coil associated therewith and the other of the first portion or the second portion has a magnetic source associated therewith. The magnetic source may include one or more magnets to produce a magnetic field that generally encompasses the coil such that current through the coil causes a force on the coil, thereby causing translation of the first portion relative to the second portion.

Abstract: A method and a damping device are proposed for damping a torsional oscillation in a rotating drive train. Arranged on the drive train is an electrical machine (13), which is connected to an electrical multipole (31). A damping torque is generated in the electrical machine (13) by an electrical damping member connected to the electrical machine (13). It is proposed that the damping torque has a predetermined damping frequency and is antiphase to the angular velocity of the torsional oscillation.

Abstract: SYSTEM FOR OPERATING A GENERATOR AS A MOTOR IN A TURBINE WIND POWER GENERATING SYSTEM includes a controller and Four Quadrant or Regenerative Drive Circuitry which alternatively operates one or more generators as motors.

Abstract: An automotive rotary electrical apparatus with less than four switching control elements capable of blocking a field current while preventing breakage of the switching control elements in response to a malfunction in a feeder circuit for a field coil is proposed. First and second switching control elements controlled by first and second control signals, and first and second diode elements are used. The field control circuit switches the first control signal to the on-level signal while keeping the second control signal as the on-level signal, then switches the second control signal to the off-level signal while keeping the first control signal as the on-level signal, and further switches the first control signal to the off-level signal while keeping the second control signal to the off-level signal, when a short-to-power malfunction of the positive terminal or a short-circuit malfunction of the first switching control element occurs in the feeder circuit for the field coil.