Abstract: An engine-driven power generating system having a bridge circuit section in which low-frequency switching elements are driven alternately by low-frequency drive signals, and high-frequency switching elements driven by high-frequency drive signals during the ON period of the low-frequency switching elements are connected in a bridge network, and an inverter circuit section having a drive signal supply circuit for supplying low-frequency and high-frequency drive signals are each supplied to the low-frequency and high-frequency switching elements that form a pair; the a-c voltage generated by an engine-driven a-c generator is converted into d-c voltage that is in turn converted into a predetermined level of low-frequency a-c voltage; characterized in that an overcurrent detecting circuit for detecting an overcurrent flowing in the bridge circuit section at a level higher than a predetermined level, a drive-signal control circuit that outputs to a drive-signal supply circuit, when the overcurrent detecting circui

Abstract: A motor vehicle power supply system for supplying current to the direct voltage loads on a motor vehicle. The system has two alternating generators which are driven by the engine of the motor vehicle. The output windings of the respective generators are connected to bridge rectifiers that supply current to a common motor vehicle direct current load. Each generator has a field winding and the current supplied to a respective field winding is controlled by a respective voltage regulator. The voltage regulators cause pulses of current to be supplied to the field windings. The system has a control circuit for controlling the pulse width of the current pulses supplied to the respective field windings such that the pulse width of the current pulses supplied to one field winding are substantially equal to the pulse width of the current pulses supplied to the other field winding.

Abstract: An automotive air conditioning system equipped with an electrical compressor uses a single-shaft, dual output generator to provide a low voltage output to drive existing 12-V or 24-V automotive electrical equipment and a high voltage output to drive the air conditioning motor-driven compressor, and a control device to control the electrical compressor.

Abstract: A portable engine generator includes an overcurrent detector which detects load current to determine whether the engine is in an overcurrent state. A voltage detector detects output voltage from the engine generator. A timer circuit starts to operate when the overcurrent state is detected by the overcurrent detector and continues to operate while the overcurrent state continues to be detected. The timer circuit starts to output a signal for interrupting the supply of output power when a predetermined time period has elapsed after the start of operation thereof. The predetermined time period is set to a shorter time period as the output voltage detected by the voltage detector assumes a lower value.

Abstract: The problem of providing isolated DC power in a 270 volt DC power system (10) has been resolved with the use of a DC--DC converter (44) for providing isolated DC power on busses (46-48) for powering pulsating loads (66), avionics DC loads (68) and AC loads (64). The use of the converter (44) further allows for reduction in size of ripple filters (92-94) and damper circuits (50-52).

Abstract: A power generator circuit is adapted to be driven by the output of a vehicle alternator. The circuit includes an input for receiving a rectified DC output from the alternator, and a pair of step-up transformers which are connected to the AC output from the alternator. The rectifiers are connected to the outputs of the step-up transformers, and are connected in series with the rectified DC output from the alternator to provide a relatively high voltage DC output. This output can be used to operate power tools, for example. The circuit includes a welding output, and allows normal charging of the vehicle battery when not being used as a power source.

Abstract: A system for charging a battery from a generator including a rectifier regulator wherein the regulated voltage is stepped up to compensate for voltage drops in the cable connecting the rectifier regulator to the battery.

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: A dual voltage power supply is disclosed for vehicles equipped with a DC generator, a single storage battery, a low voltage load circuit including the storage battery, and a high voltage load circuit including load devices designed to be powered by voltages higher than the battery voltage. At times when higher voltage power is required a low voltage regulator that includes a high current semiconductor switch converts power at the generator output voltage to power at a lower voltage for charging the battery and supplying the low voltage load circuit. There is a single voltage mode of operation when higher voltage power is not required in which the alternator is regulated to supply power at the voltage required by the low voltage load circuit and the high current semiconductor switch is held in its closed state to directly connect the generator output with the low voltage load circuit.

Abstract: A dual state power system utilizing power drivers to switch an alternator from 12 volt to 24 volt charging. A 12-24 volt alternator regulator charges a 12 volt battery or a 24 volt battery depending on the position of a mode switch. The invention allows the use of one alternator/engine combination to charge either a 12 volt or 24 volt system. The invention uses a 12 volt mode priority to override a 24 volt charging mode. The 24 volt charging mode is interrupted to provide voltage to a 12 volt battery for a predetermined time period. A voltage controller drives a smart electrical current driver which controls the output of an alternator. A reset circuit determines from system parameters reported from system components whether the charging system to a reset error circuit whether or not the alternator is operating correctly. A sense lamp driver indicates to the user that the system is in a non functioning state.

Abstract: A charging system for charging plural batteries from a generating coil without requiring a separate isolator to protect the circuit in the event of battery failure. The circuit includes a rectifying diode circuit including a plurality of parallel diode paths between the ends of generating coil and the terminals of the battery. There are a number of diode circuits at least equal to the number of batteries.

Abstract: An output circuit for a portable generator having a plurality of output windings provided separately from each other, and control winding provided separately from the output windings. A plurality of thyristor bridge circuits each having thyristors are connected respectively to the output windings. A superposing circuit superposes outputs from the thyristor bridge circuits one upon another to provide a first superposed output voltage. A rectifier circuit is connected to the control winding. The rectifier circuit is disposed such that its output voltage is superposed upon the first superposed output voltage to provide a second superposed output voltage. A control circuit is responsive to the second superposed output voltage for concurrently controlling voltages applied respectively to the gates of the thyristors of the thyristor bridge circuits to thereby maintain the first superposed output voltage at a constant value.

Abstract: An automobile ac generator system comprises a generator driven by the engine of the automobile, a system controller for converting the ac power generated by the generator to dc power, controlling the generator on the basis of the voltage of the converted dc power and converting the dc power to ac power of commercial line frequency, and a mode switch for selecting among control operating modes of the system controller.

Abstract: A supplementary heating system particularly suitable for an automotive vehicle comprises a step down transformer coupled to the stator windings of the vehicle's alternator and a positive temperature coefficient (PTC) of resistivity heater electrically connected intermediate the stator windings and the transformer in parallel with the transformer. Due to the presence of the transformer the voltage regulator causes the alternator to operate at a higher than customary voltage to provide the conventional 14.4 volts for the vehicle's normal electrical loads with the high voltage used to energize the heater. The heater can be in the form of a so-called "honeycomb" having a plurality of parallely extending passages or cells disposed in the air stream going from the main heater into the passenger compartment and can be either a multiphase, single phase or direct current type.

Abstract: A generator generates two voltage outputs which have different voltage levels. One voltage output from the generator is used for operating a power steering apparatus. Another voltage output from the generator is used for charging a battery which supplies current to other loads.

Abstract: A silicon controlled rectifier is connected between the output of each stator winding of a conventional alternator and a terminal of a lower voltage battery, and a control electrode of each silicon control rectifier is connected to a switching control circuit for switching the silicon control rectifiers to switch stator current alternatively to a lower voltage battery or to a higher voltage battery connected across the alternator stator. A voltage regulator is connected between the alternator field coil and the lower and higher voltage batteries.

Abstract: A separately power-feeding welding generator having at least two main generating windings for supplying power to loads by rectifying an induced voltage and adapted to permit the power being fed from the two main generating windings to the loads to be separately controlled, in whicha thyristor is provided in a rectifying circuit for rectifying a voltage induced in at least one of the two main generating windings;an a-c voltage detector for detecting the voltage induced in at least one of the two main generating windings anda thyristor control signal generator for controlling the conduction angle of the thyristor on the basis of the detected signal of the a-c voltage detector and the reference level obtained by extracting the level of the current being fed to the loads are provided;a diode which conducts when a positive half-wave is applied in parallel with the thyristor is connected in series with a resistor element;a first control power supply for rectifying a voltage induced in at least one of the two main g

Abstract: A dual voltage power supply is disclosed for vehicles equipped with a DC generator, a single storage battery, a low voltage load circuit including the storage battery, and a high voltage load circuit including load devices designed to be powered by voltages higher than the battery voltage. At times when higher voltage power is required a low voltage regulator that includes a high current semiconductor switch converts power at the generator output voltage to power at a lower voltage for charging the battery and supplying the low voltage load circuit. There is a single voltage mode of operation when higher voltage power is not required in which the alternator is regulated to supply power at the voltage required by the low voltage load circuit and the high current semiconductor switch is held in its closed state to directly connect the generator output with the low voltage load circuit.

Abstract: An automobile generator apparatus for producing commercial line power when driven by an automobile engine comprises a generator, an inverter unit, a controller for controlling the generator field and an accelerator actuator.The accelerator actuator is mounted opposite the accelerator pedal in such manner as to prevent erroneous operation thereof.The generator field is controlled while monitoring both the low-voltage side output and the high-voltage side output so as to prevent a large output current from flowing through the low-voltage side load. A circuit is further provided for preventing the occurrence of an overvoltage as a result of field control transistor malfunction.The switching elements constituting the output stage of the inverter unit are controlled to vary the duty ratio of the output waveform so as to stabilize the inverter output voltage and controlled to remove the center portion of the output waves so as to cope with the startup load.

Abstract: The invention relates to a high voltage electrical power supply device for an auxiliary circuit CA of a motor vehicle.The device comprises an alternator 1 having two identical stator windings 11 and 12, each connected to a rectifier bridge 13 and 14 supplying a rectified alternator voltage on a terminal B+1, B+2 an excitiation regulator 2 enabling the regulation of the excitation current of the inductor winding of the alternator and means for parallel-series/series-parallel switching of the stator windings. Alternator output terminals B+1, B+2 are provided for generating a nominal value voltage or a high voltage. A control logic is interconnected with the excitation regulator 2 and the switching means 3 to ensure the starting of the high voltage operation conditionally with respect to status parameters of the vehicle such as the engine speed, the clutch position, the temperature of the vehicle, and the supply voltage of the device.

Abstract: A battery equalization circuit maintains first and second series connected batteries at equal voltages. The circuit includes a capacitor coupled across the first battery by a pair of switches for sampling the voltage across the first battery. An error amplifier compares the first battery's sampled voltage to the second battery's voltage to produce an error signal indicative of the difference between the voltage across the first battery and the voltage across the second battery. A charging and regulating circuit is responsive to the error signal for charging the batteries to reduce the error signal to zero.

Abstract: A control for an electrical charging system for selectively connecting a single alternator with two stator coil sets producing charging current at each of six outputs to the output of a first battery and the output of a second battery serially connected to the first battery output. The control comprises a plurality of switchable full wave bridge rectifiers for connecting each of the alternator outputs to one of the first battery output and the second battery output so that the one battery is charged by the alternators. The switchable rectifiers are alternatively switchably connectable to the other battery output so that the other battery is charged by the alternators.

Abstract: A starter-generator of an automobile is disclosed which comprises a stationary field coil wound and disposed coaxially around the rotational axis. The rotor comprises a pair of field pole forming members on which circumferentially alternating field poles are excited by the magnetic flux generated by the field coil. Armature coils connected in Y-connection are disposed around the rotor, and the terminals of the armature coils are coupled to the inputs of a three-phase rectifier circuit (used when the starter-generator acts as a starting motor) and the outputs of a armature current switching circuit (used when the starter-generator acts as a charging generator) which controls the flow of current through the armature coils so that a rotating magnetic field is formed. The starter-generator further comprises a pair of auxiliary coils which are wound and disposed around the rotational axis at both sides of the armature in the neighborhood of the rotor.

Abstract: An automatic alternator is coupled to both a step up and a step down transformer. The outputs from the transformer are rectified and connected respectively to a windshield heater and to a circuit comprising the normal 14 volt car loads and the battery. A switch is coupled to the output of the step up transformer to control the energization of the windshield heater. Output leads from the alternator also bypass the transformer and are rectified with its DC output connected through switched to a positive temperature coefficient of resistivity heater and to the normal car load circuit.

Abstract: A small engine suitable for hand-held work machines such as cleavers and chain-saws in which the engine is started by driving a self-starting motor with the electromotive force of a secondary battery and wherein the size and weight of the engine is reduced by eliminating the use of a generator since the secondary battery is charged by utilizing the electromotive force of a magnet in reverse direction that is not normally used for igniting the engine.

Abstract: Accessory for a motor vehicle alternator which is delta wound and has a full wave rectifier bridge to provide output selected from normal operation of vehicle electrics, arc welding, fast battery charging and high voltage supply to extraneous appliances. A double pole single throw switch selects either normal voltage regulated shunt excitation or disables voltage regulation, provides battery excitation and charge warning via a light which indicates not only alternator failure but also supply for welding, fast charging or extraneous appliances.

Abstract: A motor vehicle electrical system that has two alternating current generators for supplying current to the electrical loads on the vehicle including a storage battery. Both alternating current generators are connected to rectifier means which supply direct current to the loads. The output voltage of one of the generators is controlled by a voltage regulator. The direct current output of the rectifier means is sensed and the field current of the other generator is controlled such that its output current is slaved to and follows the output current of the generator that is controlled by the voltage regulator.

Abstract: The electric power supply comprises an electric rotary machine intended to be driven by an engine in order to supply electrical energy to a battery and/or to various user units, and rectifier means combined with the machine for obtaining direct current. The machine is chosen in such a way that when it is driven by the engine at its idling speed, the voltage at the terminals of the machine is insufficient to ensure charging of the battery; the unit comprises means to make it possible to establish periodically a voltage surge at the terminals of the machine and a current for charging the battery.

Abstract: A 24/12 volt battery power supply for a vehicle includes two 12 volt batteries connected in series, and having first and second 24 volt terminals to the opposite ends of the batteries and a 12 volt terminal to the center common connection of the batteries. The 12 volt loads are divided into equal right and left side vehicle loads and the right side is connected across one battery and the left side is connected across the second battery. A three phase wye-connected alternator has the winding connected to a full wave three phase rectifier, the D.C. output of which is connected to the 24 volt terminals. The center common connection of the winding is connected directly to the 12 volt terminal. The system operates with balanced currents and charges on the two 12 volt batteries so long as the 12 volt loads remain balanced.

Abstract: A unitary starter motor and generator including a rotor assembly having a plurality of circumferentially disposed rare earth-iron permanent magnets, a stator assembly within which said rotor assembly is rotatable, said stator assembly including a laminated annular stator body formed from a silicon containing iron alloy of high electrical resistivity and low magnetic loss, and a multiphase stator winding secured to the inner periphery of said stator body and lying in the airgap defined between the stator body and the rotor assembly.

Abstract: A power generating system for an engine generator having an engine, an AC generator driven by the engine and an inverter for reconverting a rectification output of a main output winding of the AC generator into an alternating current of arbitrary frequency according to a driving signal. An overcurrent detecting circuit detects an overcurrent state of the inverter on the basis of the result of comparison between a detected value of the current carried to the inverter and a reference value. The inverter is protected from the overcurrent state when detected by cutting off the driving signal and thus inactivating the inverter.

Abstract: A switch connected between two voltage sources and responsive to a sensing circuit. The switch includes a transistor which operates to interchange the electrical connection of the two voltage sources from parallel to series upon the sensing circuit signals the need for more voltage. The two sources are normally in parallel to increase the cost efficiency and energy efficiency of the amplifier and power supply.

Abstract: A vehicular power supply system having a plurality of power supply voltages comprises a generator including first and second armature windings electrically isolated from each other and a field winding, a first rectifier unit converting a first a.c. output of the first armature windings into a first d.c. voltage, a second rectifier unit converting a second a.c. output of the second armature windings into a second d.c.

Abstract: A high-power, high-voltage DC power supply includes a plurality of AC generators, each of which includes a rotor and one or more sets of armature windings wherein the rotors are linked together. A plurality of rectifiers are connected together in series and the armature windings are connected to the rectifiers such that each rectifier produces a fractional voltage which is combined with the fractional voltage developed by other rectifiers to develop a combined output voltage across all of the rectifiers. The armature windings are placed relative to one another such that a plurality of equally-spaced ripple peaks appear in the combined output voltage for each 360.degree. of each armature winding voltage. This in turn minimizes ripple magnitude leading to a desirable decrease in the overall power supply size and weight.

Abstract: A power regulating system for a portable engine powered AC-DC-AC electric generator system wherein an auxiliary generator winding powers voltage regulation and frequency determining circuitry and controls a thyristor bridge circuit employed for rectifying the output of a three-phase primary winding of the generator.

Abstract: A regulated chopped DC power supply comprising an alternator with a stator and a rotor, the alternator having a three-phase winding for providing a high voltage output (1, 2, 3) and a star-connected three-phase winding for providing a low voltage output. Also included is a control circuit (14) for controlling a rectifier (12) which is connected to the high voltage output (1, 2, 3) of the alternator to produce a regulated chopped dc output (52) for powering electrical appliances. The control circuit (14) periodically interrupts the rectifier (12) at a frequency to interrupt substantially simultaneously all of the phases of the high voltage output.

Abstract: A dual voltage motor vehicle electrical system wherein a pair of batteries are connected in series across the direct voltage output terminals of a bridge rectifier that is connected to a polyphase output winding of an alternating current generator. First and second groups of controlled rectifiers are connected between a junction of the batteries and the generator output winding. In low speed operation of the generator the groups of controlled rectifiers are alternately biased conductive. The time period of conduction of the groups of controlled rectifiers is controlled as a function of the difference in the voltages across the respective batteries. The phase voltages of the output winding are summed by a summing amplifier to provide a control signal. The system includes means responsive to the control signal for preventing simultaneous conduction of the groups of controlled rectifiers.

Abstract: A power supply system for portable floodlighting equipment employing high-intensity electric discharge lamps comprises an alternating current generator having three or more independent armature windings, one for producing independently current at a voltage sufficiently high for starting a discharge lamp in series with a capacitor. The windings are out of phase with one another and interference with the operation of the lamps energized by the separate and independent windings and electric apparatus energized by the standard voltage generator is effectively eliminated. The use of the generator winding for starting and energizing the lamps eliminates the usual starting ballast and decreases the weight and cost of the portable floodlighting unit.

Abstract: A dual voltage motor vehicle electrical system. First and second batteries are series connected across the output terminals of a battery charging generator. A converter is provided that can charge the first battery from the second battery or charge the second battery from the first battery. The voltages across the batteries are sensed and the battery with the lower voltage is charged from the other battery. The system has current limit and temperature limit controls for protecting semiconductor switches that are utilized in the system.

Abstract: A dual voltage motor vehicle electrical system wherein batteries are series connected across the direct voltage output terminals of a generator. The system has a DC to DC converter that operates in a first mode as an equalizer to maintain the batteries in a substantially equal state of charge. When an electric starting motor is energized to crank the engine of the vehicle the converter is switched to a second mode of operation wherein it provides a substantially constant output voltage that is applied to certain electrical loads on the vehicle that require a stable voltage. The converter responds to a first reference voltage that is provided by a voltage divider connected across the batteries when operating in the first mode and responds to a second reference voltage provided by a constant voltage device when operating in the second mode. The system switches between the reference voltages, depending upon the mode of operation that is being used.

Abstract: A rectifying system for a magnet-type AC generator comprises a rectifier circuit including a composite bridge of a plurality of diodes and a plurality of thyristors for regulating and rectifying the output voltage of the AC generator, a first phase control circuit for applying a firing signal to the thyristors, a neutral-point diode, a neutral-point thyristor, and a second phase control circuit for controlling the phase of the neutral-point thyristor. The neutral-point thyristor is phase-controlled, and the voltage applied to a battery with an electrode thereof connected to the diodes is thereby regulated.

Abstract: Transfer apparatus for use with an AC generator having a field winding, the DC energization of which controls the output of the generator. Associated with the generator are first and second voltage regulators each including means for sensing the output of the generator and means for varying the DC energization of the generator field winding to regulate the output of the generator to a respective reference level for each voltage regulator. The transfer apparatus includes a circuit for generating a first signal as a function of the generator output as sensed by the first voltage regulator sensing means and a second signal as a function of the generator output as sensed by the second voltage regulator sensing means. Another circuit independently produces an additional signal to which the first and second signals ordinarily have a predetermined relationship. A further circuit selects the first or second voltage regulator to energize the generator field winding.

Abstract: A dual voltage power supply for a vehicle is disclosed with a DC generator, a single storage battery, a low voltage load circuit including the storage battery and a high voltage load circuit including load devices designed to be powered by voltages higher than the battery voltage. A high voltage regulator is responsive to the generator output voltage and controls the energization of the field winding of the generator for causing the generator to produce an output voltage meeting the requirements of the high voltage load circuit. A low voltage regulator receives the output voltage of the generator and produces a substantially constant regulated voltage for charging the battery and supplying the low voltage load circuit.

Abstract: An automotive electrical system with a generator has outputs for loads requiring a high and low voltage, e.g., a heater and a battery. A field-controlled a.c. generator with three-phase output windings has a low voltage main terminal and an auxiliary terminal for high voltage loads. A step-down transformer and a first rectifier connect the windings and the main terminal while a second rectifieer directly connects the windings and the auxiliary terminal. A selector switch having a open and closed positions is connected between the main terminal and the auxiliary terminal. A voltage regulator for controlling current through the generator field is connected to the main terminal. When the selector switch is open the generator provides a dual voltage output i.e.

Abstract: A dual voltage motor vehicle electrical system wherein a pair of batteries are connected in series across the direct voltage output terminals of a bridge rectifier that is connected to the output winding of an alternating current generator. First and second groups of controlled rectifiers are connected between a junction of the batteries and the generator output winding. In low speed operation of the generator the groups of controlled rectifiers are alternately biased conductive. The time period of conduction of the groups of controlled rectifiers is controlled as a function of the difference in the voltages across the respective batteries. At a higher speed of the generator one of the two groups of controlled rectifiers is biased conductive, dependent upon the relative magnitudes of the voltages across the batteries.

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: An electrical system for a motor vehicle includes a three-phase AC generator having wye-connected output windings and a three-phase full-wave rectifier. The neutral node of the wye-connected generator is grounded while the rectifier is ungrounded. As a result, three distinct DC voltages are produced: two three-phase half-wave rectified DC voltages of opposite polarity in respect to ground and a three-phase full-wave rectified voltage which is the sum of the other two DC voltages. One of the former lower-magnitude DC voltages may be employed to supply the usual low DC voltage loads of the vehicle while latter higher-magnitude DC voltage may be employed to energize a higher DC voltage load such as a window glass heater element.

Abstract: A supplementary heating system particularly suitable for an automotive vehicle comprises a step down transformer coupled to the stator windings of the vehicle's alternator and a positive temperature coefficient (PTC) of resistivity heater electrically connected intermediate the stator windings and the transformer in parallel with the transformer. Due to the presence of the transformer the voltage regulator causes the alternator to operate at a higher than customary voltage to provide the conventional 14.4 volts for the vehicle's normal electrical loads with the high voltage used to energize the heater. The heater can be in the form of a so-called "honeycomb" having a plurality of parallely extending passages or cells disposed in the air stream going from the main heater into the passenger compartment and can be either a multiphase, single phase or direct current type.

Abstract: An automotive battery charging circuit with a generator having a field winding and a plurality of stator windings, the output of the stator windings being connected to the battery through a plurality of SCR's each having individual potentiometer control means responsive to a voltage differential of the associated stator winding and the battery voltage.

Abstract: A winding arrangement for a twin winding set three-phase alternator having P rotor poles and 3nP stator slots, where P is an even integer and n is an integer greater than or equal to two, each set of three-phase windings comprising a group of P/2 interconnected winding components per phase. The stator coils each span an odd number of stator slots, and are connected such that circumferentially adjacent coils are connected in different of the sets of three-phase windings, and such that each winding component comprises one or more coils from each of two different pole pitches. As a result, a given stator slot contains winding elements belonging to only one of the sets of three-phase windings, and magnetic coupling between the sets of three-phase windings due to slot leakage is thereby avoided.