Abstract:
The present invention relates to an integrated ground power unit comprising a housing enclosing an engine drive, a generator driven by the engine drive for generation of a first voltage of a first frequency at an output that is connected to a frequency converter for generation of a stabilized multi-phase alternating second voltage of a stabilized second frequency, and a controller for ground power unit management that is adapted to adjust the engine speed in response to a load change in such a way that an operational parameter of the engine is substantially optimized.
Abstract:
An electronically controlled electrical power generator comprises a generator (15) driven by a heat engine (11), operated by control means (19), and carrying an electrical load (22). Operation of the heat engine (11) is at wide open throttle.Control over engine operation and electrical output of the generator (15) is achieved by electronically manipulating the electric load (22), and/or adjusting excitation levels at the generator's magnetic fields, so as to change engine/generator equilibrium speed. In a beneficial embodiment, the generator (15) is powered by an energy storage unit (21), to temporarily act as a motor and rotate the engine (11) when starting, and during power absorbing strokes. A method for controlling an unthrottled engine (11) including varying the gear ratio of a transmission connected between the mechanical output of the engine (11) and a mechanical load (22), to provide a torque load to the engine (11) to cause the engine (11) to move to an equilibrium speed at which its power output substantially meets a power output requirement. In a second embodiment, variance in the impedance of an AC generator (15) connected to the engine (11) provide a torque load to the engine (11) to control its equilibrium speed.
Abstract:
An apparatus is provided which includes an inertia wheel rigidly attached to a center axle, such that the wheel and axle adapted to unitarily rotate about a center axis. An axle support is adapted to rotatably support the center axle such that the inertia wheel and center axle may freely spin about the center axis. A generally planar leftside cam supporting structure is laterally positioned from the leftside of the inertia wheel such that the leftside cam supporting structure and the inertia wheel are evenly spaced from each other in a parallel manner. The leftside cam supporting structure includes a leftside inverse cam. Also, generally planar rightside cam supporting structure is laterally positioned from the rightside of the inertia wheel such that the rightside cam supporting structure and the inertia wheel are evenly spaced from each other in a parallel manner. The rightside cam supporting structure also includes a rightside inverse cam. A plurality of transfer follower arm assemblies are further provided interconnecting the leftside and rightside of the inertia wheel to the leftside and rightside cam supporting structure. Rotational movement of the inertia wheel is at least one of conditioned, controlled, regulated, governed and influenced as a function of a profile of the leftside and rightside cam.
Abstract:
The exemplary embodiment of the present invention provides a device for converting human power to electrical power. The exemplary device comprises: a plurality of gear wheels (e.g., 1, 2, 3, 4, 5 and 6) interconnected with a plurality of interconnection means (e.g., 12, 13, and 14); a first axle (9), said first axle (9) disposed through an opening in a center of a first gear wheel (1) of the plurality of gear wheels; a first pedal (18) mounted on a first pedal arm (17) and a second pedal (18) mounted on a second pedal arm (17), each pedal arm (17) mounted on opposing ends of the first axle (9); a second gear wheel (2) of the plurality of gear wheels interconnected to the first gear wheel (1) with a first interconnection means (12) of the plurality of interconnection means; an alternator (8) interconnected to one or the gear wheels (e.g., 6) of the plurality of gear wheels; a battery (22); and an inverter (27).
Abstract:
An apparatus is provided which includes an inertia wheel rigidly attached to a center axle, such that the wheel and axle adapted to unitarily rotate about a center axis. An axle support is adapted to rotatably support the center axle such that the inertia wheel and center axle may freely spin about the center axis. A generally planar leftside cam supporting structure is laterally positioned from the leftside of the inertia wheel such that the leftside cam supporting structure and the inertia wheel are evenly spaced from each other in a parallel manner. The leftside cam supporting structure includes a leftside inverse cam. Also, generally planar rightside cam supporting structure is laterally positioned from the rightside of the inertia wheel such that the rightside cam supporting structure and the inertia wheel are evenly spaced from each other in a parallel manner. The rightside cam supporting structure also includes a rightside inverse cam. A plurality of transfer follower arm assemblies are further provided interconnecting the leftside and rightside of the inertia wheel to the leftside and rightside cam supporting structure. Rotational movement of the inertia wheel is at least one of conditioned, controlled, regulated, governed and influenced as a function of a profile of the leftside and rightside cam.
Abstract:
The invention relates to a control device for a reversible, multi-phased rotating electrical machine which can operate in alternator or motor mode. The inventive device comprises a main battery (4), an electric network (5) and a unit (3) for controlling and commanding an inverter and a rectifier bridge (P) for selection in alternator mode or starter mode. According to the invention, the machine is powered by the inverter which is connected to a start-up control unit which can provide a voltage greater than that provided by the main battery (4) over the network (5). The inverter is connected to the positive terminal of the secondary voltage source via a first switch (K1) in motor mode, while the rectifier bridge (P) is connected to the positive terminal of the main battery via a second switch (K2) in alternator mode.
Abstract:
An apparatus and method for providing electrical energy to one or more functional components of electrical device and/or to recharge a rechargeable power supply of the device, by deriving the electrical energy from motion of the device, is disclosed. The inventive apparatus preferably includes one or more novel oscillating weight - based kinetic electrical power generators (KEPG) that include a novel oscillating weight having an internal cavity with a freely movable acceleration element disposed therein, resulting in improved acceleration and oscillation capabilities and lower power generation motion threshold for the KEPG. The various embodiments of the present invention disclose a variety of novel electrical devices and articles (carrying cases, clothing, etc.) incorporating, or usable in conjunction with, electrical devices, that preferably and advantageously utilize one or more novel KEPGs for generating electrical energy from motion and feeding it to the devices and/or recharging the device batteries. The inventive embodiments also include a self-recharging battery incorporating one or more KEPGs to provide a continuous recharge, a KEPG-based portable recharger capable of connection to a charging port of an electrical device, a KEPG-based motion sensor, and an electrical device with a mechanical user operable input that includes a dual mode electrical generator incorporating one or more KEPGs.
Abstract:
A controller (28) for a doubly fed induction generator (12, 20) adjusts control signals to a rotor side converter (24) and line side converter (22) to adjust rotor current when a voltage transient on a utility grid (10) occurs, so that the doubly fed induction generator can ride through the transient. The controller can also turn off the transistors of the rotor side converter (24) to reduce rotor current and/or activate a crowbar (42) to reduce the voltage of the DC link (26) connecting the converters (22, 24) when significant voltage transients occur on the grid (10). This permits continued operation of the DFIG system without disconnecting from the grid.
Abstract:
A rotating electrical machine, such as an aircraft starter-generator, that may be operated in either a DC motor mode or an AC generator mode. The machine includes a main stator that is selectively configurable as a multi-pole AC stator and a multipole DC stator. The machine also includes DC brushes that are selectively moveable into, and out of, electrical contact the main rotor, to thereby electrically couple and decouple a DC power source to and from, respectively, the rotor windings.