Quotables
"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7990115 | High frequency generator without rotating diode rectifier A high frequency starter-generator system uses an electric machine design that does not employ rotating rectifiers installed on the rotor. The output frequency of such a starter-generator is increased by about 200% as compared with a conventional starter-generator w... | 08/02/2011 |
| 7400117 | Generating system with a regulated permanent magnet machine and an active rectifier An electromechanical power transfer system that transfers power between a prime mover and a direct current (DC) electrical system, comprises: a permanent magnet machine (PMM) that has a permanent magnet (PM) rotor coupled to the prime mover, a stator with a multipha... | 07/15/2008 |
| 7368892 | Method and apparatus for controlling power generation using gradually exciting technique A generation control apparatus for vehicles is provided, in which a drastic change in the drive torque of a generator, which occurs with the cancellation of gradual excitation immediately after starting an internal combustion engine, can be suppressed to prevent sto... | 05/06/2008 |
| 7292012 | Control method of generator When drive control of a generator is performed, PWM control of a switching circuit comprising an FET and a diode connected to the opposite ends of a winding is performed. In the vicinity of a moment in time Lmax where the winding has a maximum inductance L, an alter... | 11/06/2007 |
| 7263832 | Method and arrangement for controlling an electrically operated charger The invention is directed to a method and an arrangement (10) for controlling an electrically operated charger (1), which essentially prevent a sudden drop in voltage with the run-up of the electric charger. A drive signal (AS) is formed, which drives ... | 09/04/2007 |
| 7227338 | Fixed frequency electrical generation system with induction coupler and use thereof in an aircraft A fixed frequency electrical generation system includes an induction coupler. The system includes an electricity generator with no rings or brushes, and an induction speed regulator, mechanically coupled, so as to transform mechanical energy input from a shaft rotat... | 06/05/2007 |
| 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 |
| 7116081 | Thermal protection scheme for high output vehicle alternator A system and a method for thermally protecting a high output vehicle alternator are provided. The high output vehicle alternator includes a duty cycle control system. The duty cycle control system includes an alternator temperature signal generator and an alternator... | 10/03/2006 |
| 7075290 | Tachometer apparatus and method for motor velocity measurement A method and apparatus for determining the velocity of a rotating device is described herein. The apparatus includes a magnet assembly affixed to a rotating shaft of a rotating device and a circuit assembly. The circuit assembly includes a circuit interconnection ha... | 07/11/2006 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6900618 | Power generation control apparatus for vehicle A vehicle power generation control apparatus that has a power supply circuit, a rotation detecting circuit, an exciting current detecting circuit, an exciting current control circuit, a torque detecting/maximum exciting current determining circuit and a power transi... | 05/31/2005 |
| 6486639 | Method of controlling a stand-alone electrical generator, in particular for aircraft The generator includes an asynchronous machine with a wound rotor driven mechanically and a stator connected to the network. The rotor is excited by a constant DC voltage source via an inverter controlled by a pulse width modulation control circuit. In ac... | 11/26/2002 |
| 6208120 | Excitation control system for rotating electrical apparatus An excitation control system for a generator includes a silicon controlled rectifier bridge having an input interconnected with a plurality of alternating current (AC) phases of positive and negative polarity, an output interconnected with the field input... | 03/27/2001 |
| 6188204 | Brushless AC field system for stable frequency variable speed alternators An AC generator whose field winding (4) on the rotor is excited by AC so that the resultant speed of the rotating field is the algebraic sum of the rotor speed and the speed of the field relative to the rotor itself. This makes it possible to generate AC ... | 02/13/2001 |
| 6049196 | Generator for internal combustion engine An induction machine used as a power generator for an internal combustion engine, and which generates a predetermined power regardless of a rotation speed of a rotor of the induction machine and the engine. A power P to be generated is controlled so as to... | 04/11/2000 |
| 5453901 | Detection and protection of excitation system from diode failure Loss of excitation and control and subsequent damage to exciter windings in an excitation system for dynamoelectric machines wherein one or more rotating diodes fail in a shorted mode is prevented through the use of an RC circuit for detecting AC voltages... | 09/26/1995 |
| 5068590 | Brushless generator having AC excitation in generating and starting modes An excitation system for a brushless generator having a main generator portion including a field winding disposed on a rotor and an armature winding disposed in a stator includes an exciter portion having a set of polyphase exciter field windings disposed... | 11/26/1991 |
| 4743777 | Starter generator system with two stator exciter windings A starter generator system is provided with a dynamoelectric machine having a stator and a rotor which is mounted for rotation with respect to the stator. The rotor carries a main field winding, an exciter armature winding and means for rectifying the out... | 05/10/1988 |
| 4605889 | Brushless tachometer/synchro A generator providing both tachometer and synchro outputs and comprising a magnetic stator and a corresponding armature structure. The generator stator structure produces a composite magnetic field of both constant (DC) and alternating (AC) flux. The roto... | 08/12/1986 |
| 4510433 | Variable-speed constant-frequency alternator A variable-speed constant-frequency alternator compensating for changes in speed of the prime mover by electromagnetically rotating the rotor's magnetic poles around the rotor. If the prime mover has a rotational speed above or below that required to prod... | 04/09/1985 |
| 4472673 | Rotating electric machine with speed/frequency control A rotating electric machine comprising a stator 1 and a rotor 5 which is adapted to be rotated about an axis and which is disposed opposite said stator 1. Normally, the magnetic field of the rotor is excited by a direct current which is supplied via slidi... | 09/18/1984 |
| 4467267 | Alternator excitation system An excitation system for a brushless synchronous alternator includes an exciter having a stator which includes first and second sets of field coils respectively coupled to a source of DC power and in series with polyphase AC output current developed by th... | 08/21/1984 |
| 4454464 | Pulsar rotor system and coil winding An automatic feedback and control system for operating a load off of a multi-phase rectified rotary field system of a motor vehicle and for increasing the voltage and current to the load upon demand. The multi-phase rectified rotary field system comprises... | 06/12/1984 |
| 4408152 | Single phase, self-regulated alternator A substantially constant frequency self-regulated generator produces in one embodiment 120 volts or the like single phase output or in another embodiment 120 or 240 volts or the like single phase output. The generator employs an exciter stator and a stati... | 10/04/1983 |
| 4305001 | Constant frequency alternator A double induction dynamo electric machine of the exciter-generator type provides an AC electrical output that has a substantially constant frequency characteristic by using a closed frequency loop arrangement without requiring electronic controls or, in ... | 12/08/1981 |
| 4177414 | Controllable voltage A.C. generator system This invention relates to a generator system for generating a readily controllable A.C. of a selected potential and of a substantially constant selected frequency, which system comprises a first, or master, rotary generator producing an A.C. potential of ... | 12/04/1979 |
| 4079307 | Alternating current generating device An inductor-type high frequency generator with alternating current field excitation and frequency changing output means. An excitation winding provides current for the field winding by way of a rectifier, and automatic voltage regulator and an inverter. I... | 03/14/1978 |
