Abstract: A system for inverter control of a servo motor where in the inverter is connected to a velocity control section and a position detection section is connected to the servo motor. Primary and back-up power for operating the velocity control section and the position detection section is provided by power sources that are located in the velocity control section and are connected to the position detection section by cables. The cables used to provide signal transmission between the position detecting section and the velocity control section are switched by relays to transmit the power of a power failure back-up power supply at the time of a power failure. Also, a transmission signal transmitted from one of the position detecting section and the velocity control section to the other via a first cable connection is returned via a second cable connection and a connection fault may be judged depending on whether or not the return signal matches the transmission signal.

Abstract: A heat engine operates an alternator that supplies electrical power to an electric continuously variable transmission for driving at least one ac motor through a differential to multiple wheels or to multiple independent ac wheel motors in an automobile, bus or truck. A heat engine control operates in a closed-loop power mode and decouples heat engine speed from motor speed, allowing the heat engine to produce required power at an operating speed and throttle position, or fuel injector duty cycle, that maximizes fuel economy and minimizes engine emissions. An energy storage unit (e.g., a battery, flywheel, ultracapacitor, superconducting magnetic energy storage device, or combination thereof) provides electrical energy to the electric drive system during vehicle accelerations and further reduces peak power demands on the heat engine. Advantageously, energy is recovered during vehicle deceleration and braking; and the recovered energy is used to recharge the energy storage unit.

Abstract: A moisture sensor which registers the amount of moisture from tear-shaped precipitation, particularly on a windshield. The device includes a beam director which is mounted on the windshield by an optical adhesive. The beam director has a beam transmitter on one side and a beam receptor on the other. To ensure an optically perfect attachment of the beam director as an integrated unit to the windshield, there is a parallel relationship between the windshield and the facing surface of the beam director. An optical adhesive is applied to the gap between the windshield and the beam director, and is confined to a particular area.

Abstract: An electrical control system for a voltage sensitive load having switch means for selecting from single or multiple rectified phases of a multi-phase alternator/generator to provide multiple output levels of DC voltage.

Abstract: Fresh air from an area located outside of the engine compartment is supplied to an alternator in a motor vehicle by ventilator. The ventilator is supplied with voltage from the alternator power supply system, and since a failure of the ventilator could lead to destruction of the alternator due to heat, the functioning of the ventilator is monitored by a device or circuit for monitoring and/or controlling the ventilator. This circuit also has a device for self-checking and controls the additional ventilator as a function of the alternator temperature by a device for measuring alternator temperature electrically connected to it.

Abstract: A generator-motor apparatus with economical protection measures for use in a variable speed pumping-up electric power plant, having a main transformer, a secondary winding of which is coupled to an electric power system, a power system breaker connected to a primary winding of the main transformer, a syncronizing breaker connected in series with the power system breaker, a generator-motor, a rotor of which is mechanically coupled to the pump-turbine and an armature winding of which is connected to the power system through the synchronizing breaker, the power system breaker and the main transformer, and an excitation circuit, including a frequency converter for supplying a field winding of the generator-motor with AC voltage of the variable frequency and a converter transformer for feeding the converter, which is branched from a junction of the power system breaker and the synchronizing breaker.

Abstract: A method and apparatus of adding a DC drive motor to an existing Ward-Leonard motor-generator motion drive for a material handling device which utilizes static power conversion to supply the armature current of the added DC drive motor. Existing drive motors receive their power from corresponding generators which are shaft driven by an AC motor. The added DC motor obtains its power through a transformer which reduces AC line voltage down to the proper level and which is then converted to a variable voltage reversible DC armature supply by a power conversion module. The speed of the existing motors and the added motor is synchronously controlled from an operator's master switch.

Abstract: Apparatus and method providing electrical regeneration in an electrical vehicle. An electric drive motor drives the vehicle and is powered from a bank of drive battery packs. An electric recharge motor drives a plurality of generators to recharge all of the batteries. The recharge motor is powered from a bank of recharge battery packs. Drive battery packs are paired together with recharge battery packs. A timer switch opens and closes electrical contact between each pair of battery packs and its corresponding electric motor, one pair at a time. Thus, a drive battery pack powers the electric drive motor while a recharge battery pack powers the electric recharge motor. Non-connected battery packs are recharged by the plurality of generators. The timer switch sequentially switches through all pairs of battery packs in such a fashion that each pair of battery packs is recharged for a longer period of time than it is discharged.

Abstract: A control system for a material handling device such as a drag line in which additional power required for a first motion, such as hoisting, may be obtained from the power source for a second motion such as drag and conversely additional power for the second motion may be obtained from the power available for the first motion under specified conditions.

Abstract: An inertial energy storage device including a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy including: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on the stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; and a rotor having a plurality of circumferentially spaced teeth facing the stator teeth, and a circumferential flywheel mass radially spaced from its rotational axis; and a motor control circuit including sensor means for sensing the position of the rotor relative to the stator; means, responsive to the sensor means, for generating a waveform for driving the machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of the waveform for driving the machine; and a current control circuit for controlling amplitude of the current provided to t

Abstract: A unitized (single unit) motor and flux switch alternator having stationary field, armature and motor windings which provides a magnetic path for some of the motor input power to feed through and increase the alternating current (AC) generator output. A rotor formed from a material having a high magnetic permeability (solid or laminated soft steel) is controlled in speed by controlling the magnitude and timing of the pulsed direct current (DC) supplied to the motor windings which may be wound on the stationary legs or the rotor. The current flow in the motor windings can be controlled by a mechanical commutator if the motor windings are on the rotor or by a solid-state converter if the motor windings are on the legs in a manner normally associated with brushless DC motors. The DC windings of the flux switch alternator can be replaced by permanent magnets since the reversing field in the AC output windings are predominantly time stationary.

Abstract: The control of a quantity (voltage, phase) relating to a generator-motor pair in an electric power station is accomplished by generating a pulse sequence associated with the quantity to be controlled, generating a predetermined reference pulse sequence and detecting the relative phase shift between the two pulse sequences. This phase shift, or an integrated value of a number of successive phase shifts, controls a double ramp generator, the sign and slope of which are proportional to the detected phase shift. The integrated signal is employed to vary the magnetic induction of the rotor, i.e., field excitation of the generator, to balance the system.

Abstract: An electric torque converter arranged between a driving and a driven system onsists of an alternating current generator G which is connected to a dc motor M via a plurality of circuits C, D, Ko, which operate in parallel to each other.

Abstract: A method and apparatus for reducing oscillations in input electrical power to a Ward-Leonard drive system which is subject to variations in mechanical loading, the technique utilizing a notch filter in the feedback path to the dc generator, the notch filter being turned to match the resonant frequency of the synchronous motor.

Abstract: A regulator system for both the Diesel and the electric portions of a Diesel electric locomotive allowing more reliable operation at all locomotive speeds. Said regulator has a regulator to regulate the electric power by varying the excitation (43) of the main generator by means of orders coming from a driver control (1, 8) which set a reference current level and (17) a voltage reference level (19) for the main generator and a Diesel engine gas oil reference level (18). These levels are compared with measurements of true corresponding values (24, 30, 27) and orders (43) for increasing or decreasing excitation are delivered so that the excitation of the main generator remains inside the scope delimited by the various reference levels and a Diesel power regulator which sends out orders to increase or decrease the gas oil injection in accordance with a predetermined Diesel engine speed/injection law and in comparison with the true measurements of the injection and of the Diesel engine speed.

Abstract: To provide for effective cooling of an automotive-type alternator and/or other equipment within an automobile, for example the radiator or other heat exchanger, even under external high-temperature conditions and low engine speed (n.sub.E), for example under idling conditions, the alternator phase windings (6, 7, 8) are connected to respective phase windings (16, 17, 18) of a three-phase squirrel-cage motor which is connected to a blower (2), preferably a radial-type fan, directing forced air circulation towards the alternator and/or the vehicle radiator, the alternator then being placed within the airstream of the radiator as well. A temperature and/or speed-responsive switch can be interposed between the alternator and the motor to energize the motor only if the temperature of the alternator and/or the engine, or other component, rises above a predetermined level, or if the alternator speed drops below a predetermined level.

Abstract: A variable frequency drive for a motor-generator/alternator set which is used to supply electrical power to computer or data processing equipment. Power failures in commercially supplied power results in aberrations and erroneous computations in computers and data processing equipment. An induction motor is used to drive a generator/alternator. The induction motor is driven below the synchronous speed of the generator/alternator and a variable speed drive increases the velocity supplied to the generator/alternator, preferably to a point above its synchronous speed. Therefore, when there is a commercial power failure, the generator/alternator remains within a desired frequency range for a longer period of time than a comparable generator/alternator driven at synchronous speed.

Abstract: A drive system for an electric vehicle including an electric motor having a rotatable case and a counter-rotating armature, one being operatively connected to the ground-engaging drive wheels of the vehicle, and one being operatively connected to an electric generator, and rechargeable electric storage batteries connected to the motor to drive it, the generator output being connected in re-charging relation to the batteries. A speed control consists of a drive train whereby the wheel-drive element of the motor may drive the generator-drive element of the motor, thereby stabilizing the speed of the former, whenever the former reaches or exceeds a speed representing a given vehicle speed. A continuously adjustable transmission in this drive train, manually controlled, permits ready adjustment of the vehicle speed.

Abstract: Energy conversion apparatus is disclosed to include a drive shaft, a first magnetic pole extending substantially parallel to the drive shaft and spaced radially therefrom, a second magnetic pole extending substantially parallel to the drive shaft and spaced radially therefrom, and a plurality of drive armatures each connected to the drive shaft and extending radially therefrom toward the first and second magnetic poles. The apparatus further includes control switches for sequentially energizing each of the armatures.

Abstract: A multi-winding a-c electric power supply is connected to a d-c load circuit via a power rectifier assembly comprising at least two legs connected in parallel across the load circuit. Each leg has at least four serially interconnected unilaterally conducting devices. A first one of the power supply windings is connected between the two rectifier legs at points between first and second devices thereof, and a duplicate winding (voltages of both windings are in-phase and of equal amplitude) is connected between the legs at points between third and fourth devices thereof, whereby the windings are effectively connected in parallel. The respective junctures of the second and third devices in all of the rectifier legs are interconnected by switching means which, upon switching to a closed circuit state, short circuits these junctures and thereby changes the connection of the windings from parallel to series.

Abstract: In a device for starting an AC load powered by an AC generator and designed so that, prior to starting the load, the magnetic circuit of the generator is saturated to prevent an abrupt large drop of terminal voltage thereof when starting the load, and that in this state the load is started. A starting device comprising a coil for saturating the magnetic circuit of the generator and a starter coil both of which are wound in a same direction around a common closed magnetic path to couple these two coils magnetically, and operative so that, after saturating the magnetic circuit of the generator by the saturating coil, the connections of the two coils are switched over to start the load, and that by the reverse voltage induced in the starter coil by the energized saturating coil, the surge current which is produced, when the load is started, at the time of switching the coil connections is suppressed.

Abstract: A rotary electric motor/generator comprising a stator assembly including a single stator having a motor energizing winding and a generator output winding carried by the stator. A rotor is provided rotatable relative to the stator assembly, and includes a rotor winding carried by said rotor. The generator output winding is interconnected with the rotor winding to compensate for rotor reaction when the motor/generator is operating as a motor.

Abstract: A Ward-Leonard drive system for a dragline excavator includes a feedback circuit which connects to the motor-generator armature loop to sense a signal proportional to motor armature counter emf and rate of change of armature current. The feedback circuit takes the second derivative of this signal and applies it to a circuit which controls motor speed and torque. The feedback circuit alters the response of the drive system to sudden increases in motor load caused by rough digging and thereby reduces transient loading on the mechanical elements of the drive system.