631 results about "Engine-generator" patented technology

A refrigerated truck has a power management system for optimally distributing power between one or more energy sources, energy sinks, or energy storage components on the refrigerated truck. One such power consuming component includes a refrigeration unit that cools a refrigerated compartment of the refrigerated truck. Particularly with regard to this refrigeration unit, the power management system is operative to direct power from multiple power sources to the refrigeration unit so as to efficiently use available power. To do so, the power management system dynamically determines the availability of certain power sources and selects a preferred power source based on availability and a defined order of power source preference. For example, one defined order of power source preference may include, in order of preference upon availability, a shore power source, a truck engine generator drivingly connected to the refrigerated truck's engine, one or more auxiliary power sources, and a stand alone refrigerator unit engine.

The invention discloses a system for providing mobile electric power. Equipment needed by mobile electric power is integrated on three transportation tools, so that one overall transportation can be combined, the connecting time needed by field operation is greatly shortened, and combination flexibility and high adaptability are achieved. An exhaust system can perform side connection and also canperform top connection, so the connection mode is flexible; and a gas inlet system is axially connected with a gas turbine engine and an electric generator, so that unnecessary bends are avoided, theloss of gas inlet pressure is small and the flowing direction is stable.

The present invention relates to variable speed constant frequency (VSCF) devices and methods for maximizing engine generator efficiency. In one embodiment, a VSCF device may include at least two paths for conducting power to the load. One path, a line inductor path, may advantageously incur minimal power loss when the engine generator is supplying rated power to a load. A second path, a VSCF path, may be used to ensure that the frequency of the power is maintained at a substantially constant frequency under various load conditions. Another embodiment of the invention describes a process for determining optimal engine generator speed for a particular load. Because engine speed can be varied using any VSCF device, this process determines a speed that minimizes fuel consumption, emissions, and noise pollution for a given load.

A power converter for an engine generator includes an insulative support that receives and supports circuit components for converting incoming AC power to desired power, such as power suitable for a welding application. One or more rectifier modules are provided that are received and supported by the support. Three such modules may be provided for receiving three phase power from a generator. DC power from the rectifier module is applied to DC bus plates. The plates may be coupled to capacitors. A power conversion circuit, such as a buck converter, is coupled to the DC bus plates to convert the DC power to output power.

A method and apparatus for paralleling engine generators. One or more closed transition transfer switches (CTTSes) are coupled to two or more engine generators. A system controller is programmed to operate the one or more CTTSes so that each of the generators provides an emergency power and so that the generators may simultaneously supply emergency power to the power bus.

An engine generator including a soundproofing case that houses an engine and a generator therein. The engine includes an engine-side cooling fan and an engine-side inlet. The generator includes a generator-side cooling fan and a generator-side inlet. The engine generator further includes an engine-side partition and a generator-side partition fixedly disposed within the soundproofing case to define a chamber to be cooled that houses sections of the engine and the generator that are to be cooled, an engine-side air intake chamber that the engine-side inlet faces, and a generator-side air intake chamber that the generator-side inlet faces. The soundproofing case includes a cover part whose inside face is in intimate contact with the outer peripheries of the engine-side and generator-side partitions and has an exhaust vent in a part corresponding to the chamber to be cooled.

The present invention provides an integrated engine generator Rankine cycle power system which increases the efficiency of the use of its power output. The system comprises a closed Rankine cycle power generating unit through which working fluid flows and an engine generator, the closed Rankine cycle power generating unit including a waste heat boiler for vaporizing said working fluid by means of exhaust gases discharged from the engine generator, an expander in which the vaporized working fluid expands and performs work to drive a shaft for producing mechanical power, or an electric generator coupled thereto and adapted to produce electrical power, from both the engine generator and the expander, and an external lubrication system in fluid communication with the expander wherein one or more closed Rankine cycle power generating unit components are operationally connected to the electric generator.

An adjustment method and system for an auxiliary power unit (APU) allows the APU speed to vary based on the inlet air temperature to the APU compressor. The APU is controlled by a control law that allows the APU speed to float within a selected range based on speed and electric power generators phase matching criteria that provides smooth power transfer between the APU and a main engine generator. The specific APU mechanical speed for a given temperature may be determined from a compressor map that identifies the optimum combination of pressure ratio, flow rate and efficiency for a given inlet temperature, and avoids running the APU near mechanical resonant vibration conditions.

A frame type engine generator having an engine, a generator connected with the engine and driven by the engine and a supporting frame for supporting the engine and generator therein is closed at the front surface of the supporting frame with a control panel, closed at the rear surface thereof with a muffler cover and closed at the top surface thereof with a fuel tank. To raise a noise reduction performance of the engine generator, the left side surface of the supporting frame is closed with a left panel and the right side surface thereof is closed with a right panel. The left and right panels have a double-walled structure including an inner panel and an outer panel, respectively. The left and right panels are detachably attached to the supporting frame through a rubber seal, respectively.

A thermoacoustic engine-generator that converts waste heat into electrical power. Thermal energy is converted to useful work via temperature-pressure amplification of periodic acoustic traveling waves in a compressible working fluid which cause the armature of a linear alternator to reciprocate and produce alternating current electrical energy. An external oscillator initiates reciprocating motion in the armature of a linear alternator. The armature is a combination fluid pump and fluid motor as well as the induction armature of a linear alternator. The pump end of the armature generates an acoustic traveling wave with each cycle of the armature. The traveling wave enters a waveguide-heat exchanger and is amplified in temperature, pressure and propagation velocity by thermal conduction of energy through the wall of the waveguide. The amplified traveling wave acts upon the opposite end of the armature, causing it to reciprocate within the magnetic field windings of the generator, and generate an electrical current as well as a new acoustic traveling wave. When the operating temperature gradient is attained across the hot and cold heat exchangers, the thermoacoustic engine-generator becomes acoustically resonant and self-regenerative, and will continue to operate as long as the thermal gradient is maintained. The theoretical conversion efficiency is dependent on the thermal gradient, and is 63% of Carnot.

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.

A permanent magnet embedded type concentrated winding motor generator, wherein of the mechanically and electrically independent first and second winding groups (4, 5), the plurality of first teeth (2) wound with the first winding groups (4) are divided into three groups (I, II, III) for example, and the winding directions of the windings of adjacent first teeth (2) within the same group (I, II, III) are opposite. Furthermore, one second tooth (3) wound with a second winding group (5) with a different winding specification from the first winding groups (4) is provided between each of the groups (I, II, III). Accordingly, the relative sizes of the generated voltages in the first winding groups (4) and the second winding groups (5) differ each other, allowing the realization of a compact and low cost construction capable of charging two different electric potentials from a single unit, which also enables a reduction in distortion of the waveform of the counter electromotive force, a reduction in iron loss, and an improvement in the efficiency of the motor, and enables the efficient charging of power sources with two different electric potentials.

The present disclosure relates to an engine-generator having an engine, an electrical generator and a control panel configured to control the engine-generator. The engine-generator includes a first electrical starter having a first battery, a first solenoid configured to receive a starting signal from the control panel and a first starter motor configured to crank the engine when the first solenoid receives the starting signal from the control panel. The engine generator also includes a second electrical starter including a second battery, a second solenoid configured to receive a starting signal from the control panel and a second starter motor configured to crank the engine when the second solenoid receives the starting signal from the control panel.

A diagnostic test is conducted by operating an engine-generator set at a plurality of reduced speeds. At each of those speeds, operating parameters of the engine are sensed and analyzed to detect an unsatisfactory operating condition. For example, such operating parameters may include speed of the engine-generator set, engine oil pressure and level, engine temperature, coolant level, and battery voltage. When a transition in engine speed occurs, a throttle test also may be conducted to measure how quickly and smoothly the engine reaches the new speed. After the engine reaches the normal operating speed, the generator is activated to produce electricity. One or more characteristic of that electricity, such as voltage, current and frequency, are sensed and evaluated to detect an unsatisfactory operating condition.

An electronically controlled electrical power generator comprises a generator driven by a heat engine, operated by control means, and carrying an electrical load. Operation of the heat engine is at wide open throttle. Control over engine operation and electrical output of the generator is achieved by electronically manipulating the electric load, 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 is powered by an energy storage unit, to temporarily act as a motor and rotate the engine when starting, and during power absorbing strokes.

An engine generator can have an engine duct for releasing to the outside a cooling air which is used to cool an engine and a muffler, and a generator duct for releasing to the outside a cooling air which is sued to cool a generator. The engine duct and the generator duct can be formed in one body as an exhaust duct. The muffler and the generator can be laterally aligned in parallel with each other, and the engine duct and the generator duct can be located in a manner such that the directions of release of the cooling winds from the engine duct and the generator duct are parallel to each other. The exhaust duct can be located with the generator duct secured to a crankcase. An opening of the engine duct, and an opening of the generator duct can be laterally aligned with each other, and the opening of the generator duct can be positioned above the generator.

An auxiliary power unit and a method of providing auxiliary power to a locomotive are disclosed. The auxiliary power unit assembly for a locomotive includes an auxiliary power unit removably coupleable to a rail car chassis. The auxiliary power unit includes a housing, and an auxiliary engine-generator set positioned within the housing. The auxiliary engine-generator set is configured to provide an auxiliary power to the locomotive. The auxiliary power unit also includes an auxiliary controller electrically coupled to the auxiliary engine-generator set. The auxiliary controller is programmed to receive a command and control at least one aspect of the auxiliary power unit in response to the command.

A generator support plenum for a engine-generator set for installation on a pickup truck in an RV or on a boat, for example, sits in or under or forms a part of an enclosure for the engine-generator set and defines cool air flow paths into the set for cooling the engine and generator and aspirating the engine. The plenum also defines a warm air outlet duct for escape of the cooling air. In the outlet duct a diffuser couples to the exhaust of the engine to mix hot exhaust with the much cooler escaping cooling air that has passed over the engine and generator. The diffuser eliminates the effect of the extreme hot exhaust gas and muffles the engine sound. Insulation coating the internal surfaces of the plenum further suppresses engine noise.

The present invention provides a method and a device for providing a three-phase electrical system alternating voltage for an electrical system of an aircraft, a plurality of voltage sources being provided which comprise at least one engine generator and a further voltage source, in particular a fuel cell, comprising one or more frequency converters for converting an alternating voltage of variable frequency provided by the respective engine generator into a first output alternating voltage and comprising at least one cyclo-inverter for cyclo-inverting a voltage provided by the respective further voltage source into a second output alternating voltage which is synchronous with the first output alternating voltage and constitutes the electrical system alternating voltage.

In a start control apparatus for an engine generator having a booster adapted to boost an output of a battery, there is provided an engine starter adapted to supply the boosted battery output to an output winding as a motor current to start the engine, and it is configured to determine whether a position of the piston is before a top dead center (TDC) when the motor current is to be supplied to the winding, and the motor current is increased by an increment when the piston position of the engine is determined to be before the TDC.

The present invention relates to a power system utilizing an engine generator or public power with AC source, wherein the power system particularly has the characteristics that the maximum output current thereof is limited by electromagnetic effects, and / or constant current or nearly constant current output thereof is set to be lower than the maximum output current, for powering a load, and charging a battery, or jointly powering a load with a battery; when an engine generator set is utilized to be power supply, during operation, the engine operates with the best brake specific fuel consumption and / or the range of revolutions and torque for better energy saving.

The present application and the resultant patent provide a gas turbine engine generator system. The gas turbine engine generator system may include a turbine, a generator, and a shaft. The turbine drives the generator via the shaft. A torsional damping coupling may be positioned about the shaft so as to limit the transmission of torque to the turbine during a generator based fault event.

An engine generator, sufficiently meeting a demand for a simple configuration and easy control, is provided. The output of a generator 1 connected to an engine 2 is output through a rectifier circuit 3 and an inverter 4. The generator 1 is a dual-purpose generator both for a generator function and for an electric motor function, and is driven by a drive inverter as an engine starting electric motor. A DC—DC converter 5 is provided between the output side of the rectifier circuit 3 and the output terminal of a battery 6. The generator 1 is driven as an engine starting electric motor, using the battery 6 as a power supply, when the engine is started.

A small and lightweight sound-proof generator exhibiting sufficient cooling effect. An inverter (19), an engine fan (32), a power generating body (33), an engine (34), a recoil fan (61), a recoil starter (63) are coaxially arranged sequentially from a first inlet port side. A first cooling air passage for cooling inverter (19), the power generating body (33), and the engine (34) with cooling air sucked by the engine fan (32) from the inlet port (21), and second and third cooling air passage for cooling a space surrounded by an inverter containing box (20), an engine fan cover (31), an engine cover (36) and a muffler cover (52) and a soundproof case with cooling air sucked by the recoil fan (61) from inlet ports (21b1) and (21b2) are formed. Cooling air passed through the first cooling air passage and cooling air passed through the second and the third cooling air passages are merged and discharged from an outlet port after cooling a muffler.

A portable engine generator, has a box-shaped case defining an internal space for holding an engine and an electric generator to be driven by the engine. The case is provided with carrying handles. The portable engine generator is provided with a cooling air passage through which fresh air as cooling air flows into the internal space while the engine is in operation. An inward depressed part is formed in a front cover of the case on the side of the internal space with respect to the carrying handles The carrying handles and the inward depressed part define the cooling air passage. The cooling air passage serves as a hand space into which human hand is inserted to grip the carrying handles.

A method and system for improving peak power capability in an electrical system is disclosed. The system may include an auxiliary generator operated in conjunction with one or more main engine generators during the need for increased transient load demands. The system may include a main engine generator, an auxiliary generator, an inverter / converter controller (ICC) connected to respective generators, a semi-conductor power device connected between the ICCs, and a main bus between the semi-conductor power device and a load.

The invention provides a self-propelled air suction comb tooth type lycium barbarum picking harvester which comprises a trolley, a gasoline engine generator, a comb tooth picking device and a collecting box. A thrust handle is mounted on a frame, walking land wheels are arranged on the same end face with the thrust handle, and a steering wheel is arranged on the other end face. The gasoline engine generator and the collecting box are arranged on a platform, a sorting screen and a two-channel fan are arranged in the collecting box, and the gasoline engine generator provides a power source for a motor and the fan. The comb tooth picking device comprises a picking comb and a picking comb motor, and an induced draft fan is arranged at the end, close to the comb tooth picking device, of a conveying bag. A movable handle is held in hands to enable the comb tooth picking device to press close to lycium barbarum branches, the induced draft fan sucks air to enable lycium barbarum fruit stems to be changed to deviate from a plumb line and form an included angle of 30-90 degrees with the plumb line from being in a plumb line state, the picking comb motor drives the picking comb to rotate, lycium barbarum fruits fall off from the branches to enter the conveying bag and then enter a strip rod, and the lycium barbarum fruits drop into the collecting box after being sorted by the fan.

A method and apparatus for paralleling engine generators. One or more closed transition transfer switches (CTTSes) are coupled to two or more engine generators. A system controller is programmed to operate the one or more CTTSes so that each of the generators provides an emergency power and so that the generators may simultaneously supply emergency power to the power bus.