Abstract: An electric motor (100) includes an excitation stator (10), a salient-pole rotor (20) and an excitation rotor (30), any two of the excitation stator (10), the salient-pole rotor (20) and the excitation rotor (30) being rotatable relative to each other; and a switching actuator (50) configured to select at least one of the salient-pole rotor (20) and the excitation rotor (30) to serve as a rotor rotatable relative to the excitation stator (10) by selectively fixing relative positions of two of the excitation stator (10), the salient-pole rotor (20) and the excitation rotor (30).

Abstract: The invention belongs to the category of electric motors and power generators, and may expand the area of application, reduce costs, and increase the specific power and efficiency of electric machines. These electric machine comprise a rotor and a stator with winding coils and a control device. Stator winding coils are made as a system of radial and/or tangential coils connected in series and/or back-to-back; each coil has its own electric terminals. The control device connects its electric contacts with terminals of corresponding stator winding coils in order to provide a chain control of electric current supply to the corresponding stator coils and to create, at each point in time, a pre-determined stator magnetic field including a rotating or a reciprocating stator magnetic field, depending on the spatial position and the magnetic condition of the rotor. The invention can be applied to various fields of technology.

Abstract: A wind power turbine configured to generate electric energy has: a supporting structure; a nacelle; a blade assembly which rotates with respect to the nacelle; a first and second electric machine having, respectively, a substantially coaxial first and second stator, and a first and second rotor coupled to the first and second stator to rotate about a first and second axis; a transmission configured to connect the first rotor to the second rotor; a control device configured to control the wind power turbine; and a detection system connected to the control device to detect relative movement between the first rotor and the second rotor.

Abstract: A power generator has a battery and an alternator driven by an engine. The battery assists a power energy of the alternator. An inverter circuit is connected to an output of a rectifying circuit. A DC/DC converter boosts a voltage of the battery and inputs the boosted voltage into a constant power regulator. The constant power regulator boosts an input voltage and secures a certain power. An output voltage of the rectifying circuit is monitored by a monitoring means and an output voltage of the battery is monitored by a monitoring means. When the output voltage of the rectifying circuit is equal to or less than a rated voltage, an auxiliary power value corresponding to the remaining amount of the battery is set as a power target value of the constant power regulator.

Abstract: An environmental energy-saving power generator includes a power generation module, a control module, a power module, a power generator housing, and an I/O module. A processor unit of the control module controls the power management unit and the power management unit controls the power module to supply driving power required by a drive unit of the power generation module during operation; after the power generation unit of power generation module operates, the surplus power generated by the power generation unit, when generating power, can be re-charged to the power module. The environmental energy-saving power generator effectively manages and allocates the power of power module and that of power generation module to lengthen the time when the environmental energy-saving power generator supplies power to the load for operation. The power generation units of power generation module and the drive unit may generate high-efficiency power of voltage, current, and frequency.

Abstract: A control strategy for operating a plurality of prime power sources during propulsion, idling and braking and is applicable to large systems such as trucks, ships, cranes and locomotives utilizing diesel engines, gas turbine engines, other types of internal combustion engines, fuel cells or combinations of these that require substantial power and low emissions utilizing multiple power plant combinations. It is directed at a general control strategy for multi-engine systems where the power systems need not be of the same type or power rating and may even use different fuels. It is based on a common DC bus electrical architecture so that prime power sources need not be synchronized.

Abstract: A dual channel power generation system comprises: a prime mover; a permanent magnet (PM) dynamoelectric machine that has a PM rotor coupled to the prime mover, two multiphase alternating current (AC) stators that develop electromotive force (EMF) in response to rotation of the PM rotor due to the magnetic flux linkage between the PM rotor and the stators, two control coils that each change the magnetic flux linkage of a respective stator in response to the level of a control current that passes through the control coil; a multiphase AC rectifier for each stator that receives AC power from its respective stator to supply DC power on a respective rectifier bus; a current feedback loop for each rectifier bus; a voltage feedback loop for each rectifier bus; a load-sharing controller responsive to both current feedback loops to develop a voltage regulator reference signal for each rectifier bus that is representative of the value of voltage that its corresponding stator should produce to maintain equal values of c

Abstract: A method of generating electric power includes providing at least one open-winding generator having at least one winding, wherein the at least one winding has a first terminal and a second terminal. The method also includes electrically coupling the first terminal to a first electric power electronics apparatus via a first electric bus and electrically coupling the second electric terminal to a second electric power electronics apparatus via a second electric bus. The method further includes inducing and regulating a first voltage on the first electric bus and inducing and regulating a second voltage on the second electric bus.

Abstract: Simplifying the controller of hybrid type drive unit. The output of a generator driven by engine is connected directly to a motor 7 through a converter or switching circuit 10 without being charged on any battery. The output of each phase of the generator is inputted to the converter 10. A timing controller 126 controls the conduction phase of a thyristor bridge 101 in the converter 10 so as to adjust the quantity of output power. A synchronous standard for phase control is formed based on output wave of an auxiliary winding 26 of the generator. A voltage detector 124 detects an applied voltage on the motor 7 as a motor rotation speed and the conduction angle is increased or decreased so as to maintain a detected voltage at a target value.

Abstract: The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second frequency f2. The converter also comprises a rotor means which rotates in dependence of the first and second frequencies f1, f2. The stators each comprises at least one winding, wherein each winding comprises at least one current-carrying conductor, and each winding comprises an insulation system, which comprises on the one hand at least two semiconducting layers, wherein each layer constitutes substantially an equipotential surface, and on the other hand between them is arranged a solid insulation.

Abstract: A controller for high torque, low RPM wind turbines and ocean current turbines. The turbine consists of a large, input power shaft-mounted, rotating bull-gear with stationary powertrains mounted around its periphery. The gear teeth on the bull-gear rotate past the teeth on pinions, causing the pinions to turn and delivering power to each smaller powertrain. A controller regulates torque experienced by each powertrain to assure that torques are balanced between generators at any given system load. The control method comprises the programmatically continuously looping steps of measuring a system parameter to be controlled, such as torque and/or speed, selecting the optimal number of generators to be connected/disconnected to a utility line, incrementally connecting or disconnecting generators to achieve the point of optimal performance, measuring the parameters, such as current and/or voltage, of the connected generators and adjusting the generator parameters to fine tune the system for optimal performance.

Abstract: A rotating asynchronous converter for connection of AC network with equal or different frequencies employs a first stator connected to a first AC network with a first frequency and a second stator connected to a second AC network with a second frequency, and a rotor which rotates in response to the first and second frequencies. The converter has at least one winding formed of a cable, including a conductor and a magnetically permeable, electric field confining insulating covering surrounding the conductor.

Abstract: The invention in the simplest form is an improved variable speed engine/generator set with an integrated power conditioning system and control method, used to generate high quality AC power with optimum fuel efficiency and reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of engine and generator field. The transformerless power inverter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single phase, or unbalanced loading.

Abstract: The present invention provides improved alternators for use alone or in combination with, for example, rotary internal combustion engines wherein the alternators are characterised by absence of moveable bearings or mountability to existing driving shafts by use of an aligning plate and through passage through the rotor of the alternator to mount to the driving shaft. The alternators may be further characterised by plural rotors on the rotor driving shaft. The rotary internal combustion engines of the present invention are characterised by fixed size combustion chambers formed of radial recesses around a rotor amongst other features.

Abstract: A wind or ocean turbine has an input-power shaft-mounted, rotating bull-gear with smaller stationary pinion-driven powertrains including generators mounted around the periphery of the bull-gear. A controller regulates torque experienced by each powertrain to balance torque between generators at any system load. Regulation includes controlling local voltage at each generator by a transformer configured as a reactor. Coils of the transformers are wired in parallel and actively modulated with an SOR, solid-state, switching device. Each generator output is connected to a respective primary coil of a transformer and a respective secondary coil is connected to an SCR. By using pulse width modulation, the SCR is gated on and off for a portion of a 60 Hz cycle. By adjusting the duty cycle of SCR gating, any voltage between 80% and 100% is attained to satisfy immediate torque requirements.

Abstract: A generator/starter system for starting an engine and for tapping power from the engine in order to generate electricity includes a squirrel cage rotor, a main stator winding, an auxiliary stator winding, and an excitation source. The main stator winding is magnetically coupled to the squirrel cage rotor so as to provide an AC output in response to rotation of the squirrel cage rotor and so as to rotate the squirrel cage rotor in response to an AC input. The auxiliary stator winding is magnetically coupled to the squirrel cage rotor so as to provide excitation current when the main stator winding is providing the AC output. The source of excitation current is coupled to the auxiliary stator winding.

Abstract: A combined power driven device is made up of three layers, each of the three layers forming an electromechanical structure such as a stator or an armature. One of the three layers serves as a common magnetic structure for interaction with the electromechanical structures formed by the other two layers and the three layers may be mechanically coupled with each other, a load, and/or an active power source to provide either generator or motor functions, or a combination of generator and motor functions.

Abstract: Apparatus for generating rotating motion includes one or more electrical motors or generators arranged in a circle about a central shaft. The motors or generators are attached to a rotatable plate, which in turn is attached to the central shaft. The shafts of the motors or generators are belt connected to a fixed core. Operation of the motors results in rotation of the plate and the central shaft, which further results in the motors or generators orbiting around the central shaft.

Abstract: A marine power distribution arrangement utilizes generators driven at standard or higher than normal speeds and/or having a number of poles to produce electric power at a standard 50/60 Hz frequency or substantially higher than the standard 50/60 Hz frequency, such as 400 Hz. Each generator is a multi-phase, multi-circuit generator supplying isolated outputs on a plurality of lines to a propulsion power converter having isolated inputs to provide variable frequency, variable voltage power to a ship propulsion motor and to a service power converter to provide ship service power at a standard AC frequency or DC and at standard voltage for a service load. With this arrangement, power conversion transformers can, for the most part, be eliminated, thereby reducing the size and weight of the distribution system.

Abstract: This invention provides a cogeneration system formed compactly and provided with a plurality of generators, wherein a plurality of miniaturized generators are coupled to a flywheel provided in an engine. In this cogeneration system, a toothed endless belt is meshed with a toothed portion formed on an outer circumference of the flywheel provided in an engine, and electric power is generated by driving a plurality of generators by the toothed endless belt via speedup gears. The electric power generated by the generators is synthesized and then transformed by a transformer, and the resultant electric power is consumed by a load via a rectifying diode and an inverter.

Abstract: An electric power generating system comprises a low reactance, large airgap permanent magnet generator driven by a hydraulic motor to generate a poly-phase AC output voltage. Because the permanent magnet generator is a low reluctance, large airgap machine, the output voltage regulation is low over the desired loading range of the system. The output voltage is controlled within acceptable limits by trimming the output speed of the hydraulic motor through the use of a servovalve. The control for the servovalve senses a parameter of output power and generates a speed control signal to compensate for deviations in the generator output. The system includes protection circuitry which monitors at least one parameter of the output power. This protection circuitry generates an output protection signal in response to a deviation in the monitored parameter which exceeds predetermined limits.

Abstract: A combined power system includes an active power source and an auxiliary power source. The rotation speed signal of the active power source and the rotation torque difference between the active power source and an output shaft of the combined power system is used as a basis for controlling the auxiliary power source to provide proportional auxiliary speed driving, or proportional auxiliary torque driving, or reverse damping from regenerative braking.

Abstract: An electric power starter generator system comprises a synchronous generator and an induction motor/generator mutually coupled to a shaft being driven to an external prime mover. The synchronous generator and the induction motor/generator are driven by the shaft at the same speed. The system includes a rectifier/inverter having ac terminals coupled to the output of the induction motor/generator, and dc terminals coupled to a dc bus. This rectifier/inverter allows bi-directional power flow to effectuate both power generation as well as electric start of the prime mover. The synchronous generator is excited by a commonly driven permanent magnet generator and a modulated exciter field control. The induction motor/generator is self-exciting through the rectifier/inverter once a voltage is established on the dc bus. The establishment of this voltage may be accomplished by a battery, or by connection of the synchronous generator's output to the input of the rectifier/inverter through a poly-phase contactor.

Abstract: Methods and apparatus for flexibly and elastically creating a nonbinding downhill effect is disclosed. The downhill effect physically translates the center-of-mass of rotating apparatus in a forward direction circumferential to the direction of motion which aids in the rotational motion. The downhill effect method and apparatus may be applied to electrical generating apparatus, rotational power takeoff apparatus, belt driven apparatus and even a wheel.

Abstract: This invention relates to a hybrid AC/DC power source for aircraft power generation and aircraft engine starting. The power source employs an induction motor/generator and a converter for converting high frequency AC power into separate DC and low frequency AC power for use by aircraft electrical systems. The subject invention contemplates the provision of a driver for the motor/generator comprising a circuit for providing excitation to the motor/generator when it is operating as a generator, the circuit also converting AC power produced by the generator into the high frequency AC power for use by the converter. The converter comprises a first rectifier which produces the DC power and a second rectifier and an inverter which together produce the low frequency AC power. The generator produces uncontrolled frequency AC power. Bidirectional switches operate within the circuit to invert DC excitation power to produce power for the AC excitation and to rectify output of the generator into DC.

Abstract: An electric generation system includes an electric generator swung in a orbit and having an external contact surface for rotation of its armature by a rolling engagement with an enlarged band. The band can be turned relative to the generator within a larger diameter retaining ring so that the band is constantly radially inclined at its contact point with the generator contact surface.

Abstract: Difficulties in precisely and easily adjusting the relative position of two rotors, 72, 104, 206, 226 in a dual permanent magnet generator are avoided in a structure including first and second side by side armatures 92, 108, 218, 230 with the rotors 72, 104, 212, 226 journalled therewithin. A common drive 10, 206 is provided for the rotors 72, 104, 212, 226 and there is further included a control device 80, 250, for angularly shifting at least one of the rotors 72, 104, 212, 226 relative to the common drive 10, 206.

Abstract: Prior types of generating systems for producing AC and DC output power have utilized integrated drive generators for producing the AC power and means for rectifying the AC power developed by the drive generator to produce the DC power. However, such types of systems encounter various disadvantages, including less than desirable reliability of the DC power, distortion in the AC power caused by rectification thereof to produce the DC power and reduced efficiency. In order to overcome these problems, a hybrid generating system according to the present invention comprises an AC power generating section driven by a prime mover for generating AC output power and a DC power generating section independent of the AC power generating section, also driven by the prime mover for generating the DC output power wherein each of the AC and DC power generating sections includes a permanent magnet generator.

Abstract: The invention is an "electric" constant speed/variable speed drive/generator assembly (10), which finds use in aircraft, and in particular, in "all-electric" aircraft. The assembly (10) includes a planetary differential (20) whose output is controlled by a "make-up" induction motor (12). The induction motor (12) includes a squirrel-cage rotor (14) which is rotatable about a rotor-shaped stator (16). The assembly also includes a primary power generator (30) which includes a permanent magnet rotor (18) and an output winding (22). The rotor (18) is co-axial with and rotatable about, the outside of the rotor (14). The outer rotor (18) is driven by the planetary differential (20) in such a manner that the planet-carrier (24) is driven by the aircraft's engine, the ring-gear (26) drives the generator (30), and the sun-gear (32) is connected to the induction motor (12).

Abstract: The invention is an aircraft power generation system which includes a tandem generator (10) which includes left and right generators (14, 15) arranged within a single housing (12). The left and right generators (14, 15) are driven at the anti-drive end of the tandem generator (10) by a gear arrangement including gears (22), (24) and (26). A phase indexer (36) including a phase adjust nut (38) is arranged in conjunction with driven gear (26) to provide for "vernier" phase-alignment of the generator rotors. In an alternative embodiment, phase-alignment of the generator rotors is accomplished by arranging them in-line to form an in-line tandem generator (10').In a preferred arrangement, an in-line generator (70) is arranged to be isolated from an aircraft engine via an electromechanical disconnect (108).

Abstract: The invention is a combination induction generator/synchronous generator power system which finds particular use in aircraft environments. The power system includes an induction generator (36) and a tandem generator (38) enclosed in a single housing (34). The tandem generator (38) includes a tandem synchronous generator (46) which optionally excites the induction generator (36) or provides power to the aircraft systems upon activation of the three-phase contactor (48). The tandem generator (38) also includes a tandem synchronous generator (44) which produces, via a phase controlled rectifier bridge (42), 270 VDC power for the aircraft systems.

Abstract: An engine-driven dual winding separately excited alternator supplies electric power to a parallel array of d-c traction motors via a power rectifier assembly comprising three legs of serially interconnected diodes. The alternator has a first set of 3-phase windings respectively connected to the three rectifier legs at points between first and second diodes thereof and another set of duplicate windings respectively connected to the corresponding legs at points between third and fourth diodes thereof. First and second switching means are used to interconnect the respective junctures of the second and third diodes of all three rectifier legs, and in response to transition command signals these switching means are selectively closed (or opened) in sequence to change the connection of the alternator windings from parallel to series (or vice versa). Stabilizing means associated with the excitation system of the alternator is temporarily disabled during the transition interval.

Abstract: A double induction dynamo electric machine of the exciter-generator type provides an AC electrical output that has a substantially constant frequency characteristic by using a closed frequency loop arrangement without requiring electronic controls or, in most instances, continuous application of an externally derived AC excitation signal. Moreover, the machine preferably provides such AC electrical output with a substantially constant voltage characteristic as the load current varies, without electronic voltage feedback controls.

Abstract: The system described herein is particularly adapted to convert mechanical energy from a wind or hydraulic driven turbine into electric energy and comprises: an exciter generator and a main generator in a housing traversed by a rotatable shaft; the exciter generator consists of permanent magnet mounted to the housing envelope and of a rotor mounted to the shaft and having a one-phase winding, the rotor being made of non-magnetic material to eliminate cogging and static torque associated with permanent magnet excitation; the main generator consists of a three-phase stator winding on a magnetic core mounted to the housing envelope and of a pole-type rotor mounted to the shaft, the rotor having a winding wound on a magnetic core; a rectifying bridge is rotatably mounted to the shaft and is connected to the one-phase winding of the rotor of the exciter generator and to the winding of the main generator rotor so that the rotation of the shaft as a result of mechanical energy generates a three-phase electric energy