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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7638985 | Self-excitation of switched reluctance generators during load bus faults A self-excited, switched reluctance generator obtains excitation energy from a capacitor bank via an excitation bus during normal operation. During a short-circuit or load fault, one or more phases of the generator provide power to the excitation bus while the remai... | 12/29/2009 |
| 7375499 | Fault tolerant synchronisation source for excitation control of a three phase power generating system A fault-tolerant synchronisation source for excitation control of a three-phase generator system that combines point of regulation (POR) signals representing parameters comprising voltage and current for each phase at the POR to generate a fault-tolerant synchronisa... | 05/20/2008 |
| 7345457 | Brushless exciters using a high temperature superconducting field winding A brushless exciter for a synchronous generator or motor generally includes a stator and a rotor rotatably disposed within the stator. The rotor has a field winding and a voltage rectifying bridge circuit connected in parallel to the field winding. A plurality of fi... | 03/18/2008 |
| 7242105 | Electric engine start with two motors and single motor drive An electrical starter-generator system includes a first starter-generator and a second starter-generator. A single drive controls both the first starter-generator and the second starter-generator such that their electrical current and power inputs are minimized and ... | 07/10/2007 |
| 7193395 | Systems and method for boosting output of an alternator Disclosed herein are two techniques, neutral point switching and field voltage boost, that will increase the output of today's 12 volt automotive electrical systems in vehicle idle conditions solely by the addition of circuitry. Neutral point switching enables the f... | 03/20/2007 |
| 7170263 | Method and apparatus for controlling on-vehicle generator An apparatus for controlling an on-vehicle generator is provided. The apparatus comprises a switching element, current detecting unit, setting unit and driving unit. The switching unit turns on/off an exciting current to an exciting winding of the generator, the swi... | 01/30/2007 |
| 7164983 | Switching device for detecting a voltage interruption A switching device for detecting a voltage interruption at a control unit in a motor vehicle, with a nonvolatile memory for storage of calibration data for an actuator that can be adjusted by the control unit and a drive unit. The control unit is supplied with an in... | 01/16/2007 |
| 7122994 | Control apparatus for a starter/generator system A control apparatus (202) for a starter/generator (110) of an aircraft electrical power system is provided. During a start mode of operation, AC power is provided by the control apparatus (202) to an exciter stator (114) of the starter/ge... | 10/17/2006 |
| 6844707 | AC/DC brushless starter-generator A brushless AC/DC starter generator for use with aircraft engines, the starter generator capable of both providing motive force to start the engine, and generate AC and DC power for aircraft systems. The apparatus includes a main generator, an exciter generator, and... | 01/18/2005 |
| 6333622 | Synchronous generator having auxiliary power windings and variable frequency power source A synchronous generator is disclosed having main power windings and auxiliary power windings, where the auxiliary power winding is coupled to a variable frequency drive system. The variable frequency drive causes the generator to function as a motor and t... | 12/25/2001 |
| 6025700 | Alternator regulator A regulator for a brushless synchronous alternator that includes a rotary exciter having a stationary excitation inductor. The regulator includes, in combination, a power stage connected to the alternator, an analog regulator circuit connected to the powe... | 02/15/2000 |
| 5973482 | Power boost circuit for a voltage regulator The present invention pertains to an apparatus for providing current. The apparatus comprises a voltage regulator for regulating output voltage of a generating device to a predetermined level. The apparatus is also comprised of a voltage boost circuit for... | 10/26/1999 |
| 5352929 | Apparatus and method for regulating a generator of an internal combustion engine The apparatus for controlling an output voltage of a generator of an internal combustion engine having a starter device, includes a charge control signaling device, an excitation coil for the generator and a voltage regulator controlling an excitation cur... | 10/04/1994 |
| 5245271 | Voltage regulator and method A voltage regulator for regulation of automotive electrical generators and battery system. A generator is coupled through a rectifier to a voltage regulator and a battery. The regulator is activated by a low voltage level stator signal from the generator.... | 09/14/1993 |
| 5107198 | Apparatus for charging a battery especially a battery in a motor vehicle, with a self-exciting generator The apparatus for charging a battery particularly for a motor vehicle, with a self-exciting generator is provided in which the generator pre-excitation is improved during starting in that an additional relay is triggered via the starter arrangement, which... | 04/21/1992 |
| 4882531 | Integrated circuit voltage regulator and charging system Integrated circuit voltage regulator (60; 81; 91) is provided for use in a battery charging system (10) for providing excitation current to a field coil (13) of an alternator (11). The integrated circuit voltage regulator includes a transistor (70) which ... | 11/21/1989 |
| 4862058 | Voltage regulator A voltage regulator that reduces the voltage output of a generator to make it appropriate for use with an external load. The voltage regulator includes a starting unit for use with on-demand generators to cause the on-demand generator to start without pre... | 08/29/1989 |
| 4831322 | Voltage regulator for charger/generator In a voltage regulator for charger/generator comprising a switching element, connected between a battery and a field winding of a generator adapted to charge the battery, for switching on and off an exciting current flowing through the field winding and a... | 05/16/1989 |
| 4695786 | Voltage regulator for an alternator having an auxiliary stage for starting the alternator at a low rotational speed A voltage regulator for an alternator has an integrated actuator stage consisting of a Darlington transistor pair and includes an auxiliary stage which, at the time of starting of the alternator, causes a low voltage drop across the actuator stage by caus... | 09/22/1987 |
| 4599552 | Generator voltage regulator A voltage regulator circuit for a three phase AC generator includes an integrator circuit which integrates the voltage across each negative half cycle of generator output and compares it to a reference voltage to adjust the phase angle of an SCR circuit w... | 07/08/1986 |
| 4581572 | Alternating current generator for a car Excitation of a field coil 2 is carried out by a separated power source 9 placed independent of a battery 8 to increase the output of a generator. A solar battery 10, a piezoelectric element 13 or a thermoelectric converting element 19 is used as the sepa... | 04/08/1986 |
| 4451776 | Charging generator control system The present invention relates to a charging generator control system comprising a generator which includes a field winding, and an armature winding being in three-phase connection to generate an A.C. output; a rectifier which rectifies the A.C. output fro... | 05/29/1984 |
| 4409539 | Self-excitation for an alternator of the low-carbon steel rotor type A charging system for amplifying AC output voltages induced in at least one stator winding of an alternator by residual magnetism from a low carbon steel rotor to self-excite the charging system by means of the residual magnetism at low engine RPM. An ele... | 10/11/1983 |
| 4362983 | Generation control system for vehicles A generation control apparatus for vehicles comprises a voltage regulator circuit for controlling the generation of power by a vehicle generator. The power is supplied to the voltage regulator circuit through a first circuit including an ignition switch a... | 12/07/1982 |
| 4293811 | Voltage regulator system for vehicle generator A semi-conductor voltage regulation system for a vehicle alternator has a timed signal generating circuit initiated by the engine starter signal. The field exciting current of the alternator is first supplied for a predetermined period after the engine ha... | 10/06/1981 |
| 4293810 | Control systems for electric generators The excitation winding of an alternator is energized through a silicon controlled rectifier (SCR) from the output of the alternator. The SCR is bypassed by a constant current network to allow the alternator to start up; even with no excitation current, wh... | 10/06/1981 |
| 4288736 | Control systems for electric generators The excitation winding of an alternator is energized through a silicon controlled rectifier (SCR) from the output of the alternator. The SCR is bypassed by a constant current network to allow the alternator to start up; even with no excitation current, wh... | 09/08/1981 |
| 4275344 | Voltage control apparatus for electric generators for vehicles In a voltage control apparatus for an electric generator (1) for vehicles including an armature winding (3), an exciting coil (4), a rectifier (2) for rectifying an a.c. output from the armature winding, and a voltage regulator (5), the voltage regulator ... | 06/23/1981 |
| 4266181 | Voltage regulator system for vehicle generator A semi-conductor voltage regulation system for a vehicle includes engine rise-up detection circuit and an oscillator circuit. The field exciting current is intermittently supplied by the oscillator circuit before the engine starts and continuously supplie... | 05/05/1981 |
| 4258307 | Voltage control apparatus for a vehicle-mounted alternator When an engine key switch of a vehicle is closed, a rotor coil of a three-phase a.c. alternator adapted to charge a vehicle-mounted battery is excited by a first controlling circuit. Even with the closure of the engine key switch, the exciting current is ... | 03/24/1981 |
| 4222002 | Potential generating system including an auxiliary direct current potential producing arrangement In a direct current potential generating system of the type in which the system potential generating device field winding is energized by the generating system output potential connected in a field winding energizing circuit, an auxiliary direct current p... | 09/09/1980 |
| 4222001 | Self-excited dynamo-electric machines with improved start-up characteristics In known generators and motors a regulator circuit connected in series with the exciter winding creates too much resistance to allow self-excitation to start at very low speeds. The regulator circuit is therefore shunted by a positive temperature coeffici... | 09/09/1980 |
| 4087736 | Current generating system A generator comprises an output winding connected to input terminals of a full-wave rectifier and a field winding. A resistor and diodes are also connected to the input terminals for supplying voltage to a voltage regulator. The generator, the rectifier a... | 05/02/1978 |
| 4079306 | Current generating system for motor vehicle A generator has a positive and a negative output terminals across which a battery is connected, and another output terminal for generating an output power earlier than the positive output terminal when the generator begins to generate an output power. A f... | 03/14/1978 |
| 3982169 | Excitation system for a self-excited alternator A capacitor is connected in circuit with the output windings of an alternator in such a manner that it is charged in a first direction during selected half cycles and in a second direction during the other half cycles of the alternator alternating current... | 09/21/1976 |
