Abstract: A device is presented having a multiplicity of motors connected to a shaft. A multiplicity of motor control devices are connected to the motors. A multiplicity of bearings are connected to the motors and the shaft. The multiplicity of motors, the multiplicity of motor control devices and the multiplicity of bearings continue to control the shaft rotation speed upon failure of either one of the multiplicity of motors, the multiplicity of motor control devices, or the multiplicity of bearings. Also presented is a device having at least one motor connected to a shaft. At least one bearing is connected to the at least one motor and the shaft. The at least one bearing has a multiplicity of rotating sleeves.

Abstract: A portable power unit having an internal combustion engine, a tank for holding a supply of pressurized fluid, an electrical generator powered by the internal combustion engine, and a pump selectively powered by the internal combustion engine. An electro-magnetic clutch is energized by a pressure switch on the tank when the pressure in the tank falls below a predetermined value, and a cooling fan for the pump may also be energized by the pressure switch together with the clutch. A non-slip positive drive belt couples power from the engine to the generator. The generator is overdriven at a shaft rotation speed above that of the engine's shaft, and the pump is underdriven at a shaft rotation speed below that of the engine's shaft.

Abstract: A hydraulic transmission pump assembly including a pump adapted to provide fluid under pressure to predetermined components in a transmission, an electric motor operatively coupled to said pump, and a line pressure control device in electrical communication with said electric motor. The line pressure control device is operable to control the electric motor as to cause it to drive the pump when engine speeds are below a predetermined level such that the pump provides fluid at a predetermined volume and pressure to the transmission during this operating condition. A differential gear assembly is also included that is interposed between an engine and the electric motor, the differential gear assembly acting to drive both the pump and the electric motor when engine speeds are above the predetermined level such that the pump provides fluid at a predetermined volume and pressure to the transmission and the electric motor provides generated electricity.

Abstract: An improved control method for a dual mode compressor drive arrangement selectively operates an electric machine coupled to the compressor as a motor or a generator during operation of an engine coupled to the compressor for improved efficiency and performance. The machine is operated as a generator to increase the available power for vehicle electrical loads when compressor operation is not needed or when the engine is driving the compressor. Conversely, the machine is operated as a motor to drive the compressor under heavy engine loading or when the engine speed is outside a desired operating range defined in terms of compressor speed.

Abstract: A displacement machine for compressible media includes at least two shafts. Each of the shafts has a rotor which is configured as a profiled body with the profiles of the rotors engaging one another in the manner of gearwheels during rotation and running without contact relative to one another. Each of the shafts is driven by an electric motor. The angular positions of each shaft is determined by an associated synchro resolver. Each of the synchro resolvers has a rotor and emits an electronic signal to the electric motor of the shaft such that the motors are electronically synchronized. Each of the shafts further has a gearwheel, with the gearwheels engaging one another and having an angular clearance which is smaller than that of the profiled bodies. At least one of the gearwheels is directly connected to the rotor of the synchro resolver associated with its shaft and both gearwheels together are releasably connected as a unit to the shaft.

Abstract: A selectively driven compressor for stopping the power generating operation of a motor when an internal combustion engine is operating to make it unnecessary to provide the motor that can withstand high voltage. The system reduces the load on the internal combustion engine. The system includes a pulley driven by a main drive source, an electric motor, which includes an armature and a field system, driven by a power source. The compressor is driven selectively by the pulley or the electric motor. The armature and the field system of the electric motor are independently supported. The pulley is mechanically connected to either of the armature and the field system, and the compressor is mechanically connected to the other.

Abstract: A liquid propellant supply system (10) according to the invention is electrical in nature and avoids the need for a gas generator and a turbine assembly. In particular, the system (10) includes an electrical power source (12), a controller (14) and a motor (18) for driving the pump (20). The electrical power source (12) provides electrical power sufficient for high power, limited duration applications such as for launch vehicle applications. For launch vehicle applications, the power source (12) is preferably capable of providing very high power for at least 60 seconds. A number of different types of electrical power sources may be employed in this regard. For example, the power source (12) may include high energy density batteries, supercapacitors, or counter rotating flywheels. Multiple counter rotating motors may be employed in order to minimize precessional forces.

Abstract: A gear pump having two meshing gears which are each assigned to a shaft and which are each driven by a driving unit. The driving units are controllable by a control unit such that the shafts rotate at a definable angular velocity. The control units have a symmetrical construction, and a control device provided in each control unit, each control device being connected to the other by way of a data line.

Abstract: A portable power unit having an internal combustion engine, a tank for holding a supply of pressurized fluid, an electrical generator powered by the internal combustion engine, and a pump selectively powered by the internal combustion engine. An electro-magnetic clutch is energized by a pressure switch on the tank when the pressure in the tank falls below a predetermined value, and a cooling fan for the pump may also be energized by the pressure switch together with the clutch. A non-slip positive drive belt couples power from the engine to the generator. The generator is overdriven at a shaft rotation speed above that of the engine's shaft, and the pump is underdriven at a shaft rotation speed below that of the engine's shaft.

Abstract: A supercharging device of a hermetic compressor comprises a suction chamber connected with a suction pipe and a cylinder, the suction chamber formed at lower side of a cylinder block; a suction fan rotatably disposed in the suction chamber; a driving pulley disposed on a lower end of a crankshaft; a driven pulley disposed on a rotating shaft of the suction fan; and a belt connecting the driving pulley and the driven pulley. Accordingly, the suction fan rotates with the crankshaft, and moves the refrigerant in the suction chamber to the cylinder, and thus the amount of the refrigerant drawn into the cylinder is increased and consequently the volume efficiency of the compressor is increased.

Abstract: The invention relates to a gear pump consisting of two meshing gears which are each assigned to a shaft and which are each driven by means of a driving unit. The driving units are controllable by a control unit such that the shafts rotate at a definable angular velocity. According to the invention, the control units have a symmetrical construction, a control device being provided in each control unit, which control device is operably connected with the other by way of a data line.

Abstract: A gear pump having two meshing gears which are each assigned to a shaft and which are each driven by a driving unit. The driving units are controllable by a control unit such that the shafts rotate at a definable angular velocity. The control units having a symmetrical construction, and a control device provided in each control unit, each control device being connected to the other by way of a data line.

Abstract: In order to achieve a smooth shift between two drive sources, an electromagnetic clutch is engaged, when the rotation rate of the compression unit and the engine rotation rate match, to switch from motor drive to engine drive during engine startup or engine acceleration. The motor is driven before the electromagnetic clutch is cut off to switch from engine rive to motor drive during engine stop or engine deceleration.

Abstract: A hybrid compressor that is selectively driven by an engine and a motor. A compression mechanism includes a drive shaft. A clutch is attached to the front of the compression mechanism, and the motor is attached to the rear of the compression mechanism. The motor has an output shaft connected to the drive shaft. The clutch selectively transmits power from the engine to the drive shaft. This structure makes the hybrid compressor compact and reduces the imbalance of the load applied to its drive shaft.

Abstract: A hybrid electric hydraulic drive system, having a first cylinder (75) having a left chamber (32) and a right chamber (34) separated by a piston (22). A second cylinder (76) has a single or sole chamber (74) for receiving hydraulic fluid with the second cylinder enclosing a second piston (78). The second cylinder is substantially equal in length to the first cylinder and is rigidly attached to the first cylinder. A pump (14) is fluidly connected to the left chamber (32) by a first fluid passage (16) and is fluidly connected to the right chamber (34) by a second fluid passage (18). A third fluid passage (80) is directly connected to the right chamber (34) and to the sole fluid chamber (74) of the second cylinder (76). A first rod (30) is connected to the piston (22) and a second rod (84) is connected to the second piston (78). The first and second rods are connected by a connecting element so the rods move in unison.

Abstract: A backup system for powering a fan that engages in the event of primary power loss. The system includes a backup motor run by an alternate power source and controlled by a backup circuit. When primary power is lost, a solenoid is de-energized, depressing a microswitch and completing the backup circuit to the alternate power source. The backup motor rotates into contact with the fan to ensure uninterrupted airflow. This backup system is especially suited for powering an air distribution fan that ensures sufficient oxygen reaches a coal fire burning within a coal stove, thus maintaining the coal fire until primary power is restored. This backup system is readily adapted to typical coal-burning stoves in addition to other devices.

Abstract: A supply pump for lubricant or heat transfer liquid of a conventional design is driven by a drive unit independently of the consumer of the lubricant or of the heat transfer liquid. In the event of the failure of the drive unit a forced connection occurs between the pump and the rotating parts of the consumer in order to ensure its supply with the lubricant or the heat transfer liquid at least for a sufficient emergency period. By the independent drive of the supply pump the supply to the consumer can be controlled according to the consumption of lubricant or heat transfer liquid independently of its individual operating characteristic or operating state.

Abstract: An oil pump driving device drives an oil pump combined with a transmission coupled to an engine for supplying working oil to lubricate the transmission and enable the transmission to make gear shifts. The transmission includes a first power transmitting mechanism for connecting the output shaft of an electric motor to the drive shaft of the oil pump, and a second power transmitting path for connecting the output shaft of the engine to the drive shaft of the oil pump. A controller for selecting one of the first and second power transmitting mechanisms at a time selects the first power transmitting mechanism to drive the oil pump with the electric motor when the rotational speed of the output shaft of the engine is lower than a predetermined speed, and selects the second power transmitting mechanism to drive the oil pump with the engine when the rotational speed of the output shaft of the engine exceeds the predetermined speed.

Abstract: A synchronous rotating apparatus synchronously rotates a plurality of rotary shafts independently driven by corresponding driving devices. The apparatus includes: a mechanical regulating member, arranged on the shafts, for maintaining relative rotating positions of the shafts at a predetermined angular difference; a rotation velocity and phase-detecting member, arranged on each shaft, for detecting rotation velocities of the shafts and phases within a regulated angular difference of the regulating member, and a driving control device for controlling the driving devices of the shafts so as to synchronously rotate the shafts based on a phase difference detected by the detecting member. The apparatus is applied to a fluid rotary apparatus.

Abstract: A fluid-rotating apparatus comprises a positive displacement pump structure section for rotating the rotary shaft of each of a plurality of rotors synchronously. In controlling the synchronous rotation of the rotary shafts by a PLL control method, a gain-switching means device is provided to set a high gain in a PLL control circuit when the rotary shafts are accelerating or decelerating and setting a low gain therein when the rotary shafts are rotating in a steady state.

Abstract: A low pulsation displacement pump has a pair of plungers and motor driven-cams or feed screws for reciprocating the plungers. In order to cause the pump to stably discharge a liquid so that variation in discharge due to machining errors of the plungers or the feed screws is eliminated, the pump discharge pressure is measured at each of a plurality of predetermined operative positions of the plungers before delivery of the pump from a manufacturing plant, and machining errors are obtained in accordance with the thus-measured discharge pressure. Then, the speed correction factor for the motor is calculated for each of the plurality of predetermined positions of the plungers in accordance with the thus-obtained errors to store the results of the calculation in a memory.

Abstract: Engine (10) shaft power provides a first input (16) for a differential gear box (18). This input (16) is additive in a gear box (18) to a second input (30) from an electric motor (32). The output (22) of the gear box (18) powers a rotor (24) of an auxiliary compressor (12) which produces compressed air for providing needed pneumatic services aboard the aircraft. Compressor rotor speed is sensed (sensor 40) and used for controlling operating current (via controller 42 and frequency converter 44) to the electric motor (32). Motor (32) is an electronically commutated brushless electric motor having a high torque output which is substantially linearly proportional to the input current.

Abstract: An electropneumatic converter is provided comprising a gear pump. The two othed wheels are driven by two electric motors rotating at high speed in opposite directions. The control circuits for each of the motors are independent and a single motor may drive the pump permanently.The converter is used, for example in an activator for a cardiac module or artificial heart.

Abstract: Apparatus for rotating a fluid impeller of a centrifugal or axial flow fan, at multiple speeds. A fan is provided with a first and a second electric motor for drivingly rotating a fluid impeller at relatively fast and slow speeds, respectively. The rotor of the first motor directly drives the fluid impeller; the second motor is connected to the impeller shaft of the fan through a belt drive, with pulleys sized to reduce the impeller's rotational speed relative to that of the second motor.Only one of the motors is provided with a start winding. Control means selectively energize the first and second motors, and are operative to energize the one motor long enough to bring the other motor up to operating speed.