Class 323/306 - Ferroresonant

Subclass of Class 323 - Electricity: power supply or regulation systems
Definition: Subject matter wherein the transformer is associated with
No. of patents: 24
Last issue date: 03/04/2008

Number	Title	Issue Date
7339366	Directional coupler for a accurate power detection A power detection system implemented using a pair of directional couplers and a transmission line (or equivalent) disposed between the directional couplers, wherein the transmission line (or equivalent) provides a 90° phase shift between the directional couplers. A...	03/04/2008
7170383	Method and apparatus for transferring energy in a power converter circuit A reduced cost energy transfer element for power converter circuits. In one embodiment, an energy transfer element according to an embodiment of the present invention includes a magnetic element having an external surface with at least a first winding and a second w...	01/30/2007
7116007	Protecting medium voltage inductive coupled device from electrical transients There is provided a method for protecting loads associated with power distribution system inductive signal couplers. The method includes (a) providing an inductive signal coupler having a first winding in series with a line conductor of a power distribution system, ...	10/03/2006
7012414	Vertically packaged switched-mode power converter A vertically packaged cellular power converter solves the problems associated with conventional designs and paves the way for a cellular circuit architecture with ultra-low interconnect resistance and inductance. The vertical packaging results in a power flow in the...	03/14/2006
6856230	Harmonic filtering circuit with special transformer A filter uses a special autotransformer that has a ferromagnetic core with a plurality of legs and flux return bars. A first coil is located on one leg, and a second coil is located on the same leg, but spaced from the first coil. The first coil and at least part of...	02/15/2005
6348782	Uninterruptible power supply systems, voltage regulators and operating methods employing controlled ferroresonant transformer circuits An uninterruptable power supply system for producing an AC voltage from at least one of a DC power source or an AC power source includes an input terminal configured to receive an AC voltage from an AC power source, and an inverter operative to produce an...	02/19/2002
5670848	Light monitoring system A series-fed light monitoring system, used for example for runway lights at airports, and fed by a low-frequency feeding current, comprises at least one series loop having one or more loading points connected in series in the form of fittings with lamps o...	09/23/1997
5394079	Current mirror with improved input voltage headroom A novel current mirror is taught which provides improved input voltage headroom. The current mirror provides for the ratioed current mirroring of an input current supplied by a current source while providing an increased voltage level to that current sour...	02/28/1995
4833338	Ferroresonant regulator for inductively coupled power distribution system A ferroresonant regulator for use in an inductively coupled high frequency power distribution system. A constant current resonant power source, comprising a sine wave oscillator (12), an amplitude controlled amplifier (16), a power amplifier (20), and an ...	05/23/1989
4656412	Ferroresonant flux coupled battery charger A battery charger for incorporation into an electric-powered vehicle is disclosed. The charger includes a ferroresonant voltage-regulating circuit for providing an output voltage proportional to the frequency of an input AC voltage. A high frequency conve...	04/07/1987
4631471	Inductor apparatus for application of ferroresonant regulators An inductor structure is combined with a ferroresonant regulator as a filter inductor in one instance, and as a regulating inductor in another. In one example, a ferroresonant voltage regulator includes a pair of shunt filters at its output to reduce the ...	12/23/1986
4558271	Power inductive couplers A two-part separable inductive coupler is provided in one part with a current-limiting reactor whose control winding is energized by control means in response to the formation of a magnetic circuit between primary and secondary windings incorporated in sa...	12/10/1985
4531085	Polyphase line voltage regulator A polyphase line voltage regulator which uses polyphase pulse saturable ferroresonant reactors in series with three separate and equal input chokes. The line voltage regulator is particularly suitable for computer operations which impose a variable curren...	07/23/1985
4429260	Television receiver power supply ferroresonant load circuit provided with a redundant operating capability A self-regulating power supply for a television receiver includes a transformer with a primary winding coupled to a source of input voltage for developing an alternating polarity supply voltage across a secondary winding. The supply voltage is stepped up,...	01/31/1984
4424469	Television receiver ferroresonant high voltage power supply using temperature stable core material A ferroresonant power supply having a relatively temperature stable output voltage includes a saturating magnetic element having a magnetizable core and a winding located thereon. A magnetizing current is developed in the winding by a high frequency sourc...	01/03/1984
4385263	Television receiver, push-pull inverter, ferroresonant transformer power supply synchronized with horizontal deflection A primary winding of a power transformer is coupled to a source of DC voltage. First and second controllable switches are coupled to the primary winding in a push-pull arrangement. A control circuit responsive to a deflection rate input signal that is syn...	05/24/1983
4305033	Polyphase ferroresonant voltage stabilizer having input chokes with non-linear impedance characteristic Power conditioning apparatus particularly suited for computer facilities and including non-linear input chokes connectible with line power. The outputs of the input chokes are serially, magnetically coupled through primary windings to pulse saturable reac...	12/08/1981
4274046	AC Resonance transformer An a.c. Resonance Transformer for operating at a predetermined frequency. The transformer comprises a resonant π-type or T-type stage. The π-type stage includes three series connected four-terminal networks. The first of the networks and the third of th...	06/16/1981
4258312	Vital voltage regulator and phase shift circuit arrangement The primary winding of a saturable transformer is coupled to an alternating current source by a series tuned filter network. The transformer secondary winding is coupled to a load network by a second series filter tuned to the source frequency to block ha...	03/24/1981
4242630	Ferroresonant voltage regulator incorporating auxiliary winding for large current magnitudes of short duration An auxiliary winding is provided on a ferroresonant voltage regulating transformer. The transformer is controlled in such a manner that, during start-up of a load connected to the transformer, the auxiliary winding provides all the current for the load, a...	12/30/1980
4165527	Current limiting circuit arrangement A current limiting circuit arrangement is disclosed herein and includes a pair of parallel connected circuits, preferably identical circuits, each of which includes series connected conductive and capacitive reactance tuned to resonate at a given frequenc...	08/21/1979
4045717	Battery charger In a battery charging circuit for charging a battery load characterized by having a substantial effective capacitance, a transformer is connected in a Scott T configuration, the transformer input being adapted for connection to a three phase power line, a...	08/30/1977
4007416	Voltage regulating transformer A voltage regulating transformer is disclosed which includes a magnetic core and a primary winding connectable to an alternating current source for inducing an alternating magnetic flux in the magnetic core. The secondary winding comprises a plurality of ...	02/08/1977
3988594	Electric fences An electric fence controller for controlling the charge on an electrified fence. A charging circuit is provided which includes a ferro-resonant input transformer. The transformer is provided with primary and secondary windings wound on separate legs of a ...	10/26/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 323/306 - Ferroresonant