Class 363/154 - Stationary

Subclass of Class 363 - Electric power conversion systems
Definition: Subject matter wherein the transformer has no moving parts.
No. of patents: 31
Last issue date: 09/07/2010

Number	Title	Issue Date
7791916	Prism-type electrical converter for the generation, transmission, distribution and suppy of electric current, and production method thereof The invention relates to a prism-type electrical converter for the generation, transmission, distribution and supply of electric current. The electrical converter includes two systems, a magnetic system and an electrical system, plus an additional thermal control or...	09/07/2010
7626839	Portable device for generating two phases from a single electrical phase A portable device for generating two electrical phases from a single electrical phase. The portable device includes a housing having a toroidal transformer therein. An input terminal block and an output terminal block are mounted to the housing and are electrically ...	12/01/2009
7330095	Cooled multiphase choke assembly A cooled multiphase choke assembly comprising a first coil (L1, L2, L3) for each phase (U, V, W) and a first cooling element (11), each first coil (L1, L2, L3) comprising several turns of winding, which define a subst...	02/12/2008
7277302	12-pulse converter including a filter choke incorporated in the rectifier The invention provides a 12-pulse converter comprising an autotransformer having a primary winding connected in a delta configuration and two secondary windings connected in star configurations, the two secondary windings being connected to two rectifier bridges tha...	10/02/2007
7274280	Nine-phase step-up/step-down autotransformer An irregular polygon connection of a three-phase autotransformer using only five windings per phase provides a source of nine-phase power suitable for an 18-pulse AC to DC power converter. The windings are connected in a manner to limit the amount of third harmonic ...	09/25/2007
7233506	Low kVA/kW transformers for AC to DC multipulse converters A polygon connected autotransformer in conjunction with zero sequence blocking inductor(s) enables multipulse AC to DC converters to use lower kVA parts rating by using appropriate phase-shifted voltage sets in conjunction with inductors that extend the conduction p...	06/19/2007
7049921	Auto-transformer for use with multiple pulse rectifiers Zig-zag connected, phase shifting, auto-transformers that provides the inherent ability to block the flow of zero sequence currents that are associated with multiple-pulse rectifiers. The transformer coils are wound in three separate, multi-wound windings on three s...	05/23/2006
6995993	Rectification system for improving power quality of electrical power systems A system and method for an autotransformer configuration including a plurality of windings which can be used to provide a substantial reduction in harmonics. The autotransformer includes a series of wye windings configured to provide a constant length voltage vector...	02/07/2006
6940251	Decoupling of cross coupling for floating reference frame controllers for sensorless control of synchronous machines A synchronous motor controller and method of controlling a synchronous motor without using rotor position sensors are provided. In a floating synchronous reference frame controller, phase currents are measured and a current Park vector is determined. The error betwe...	09/06/2005
6914350	Switching arrangement A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty module...	07/05/2005
6906437	Current rectifier assembly for rotating electrical machines, in particular motor vehicle alternators The invention concerns a current-rectifying arrangement for rotary electrical machines of the type comprising a support (50, 51, 51′) for a plurality of positive diodes (66), a support for a plurality of negative diodes, forming part of the rear bear...	06/14/2005
6766605	Method and apparatus for illuminating advertising and marketing metered and unmetered parcel and package smart drop boxes and receptacles A normal four sided drop box 10 is provided with with new panels 12 which are made from translucent material replacing the standard solid metal or aluminum side, front and rear panels currently employed. The panels are placed on the sides, rear and fro...	07/27/2004
6525951	Simplified wye connected 3-phase to 9-phase auto-transformer In an 18-pulse converter system a three-phase to nine-phase auto-transformer with multiple windings per phase is used to power a nine-phase AC to DC converter. The transformer kVA rating is about 55% of the DC load kW. The basic topology is that of a wye ...	02/25/2003
6424552	Multiphase transformer having main and auxiliary transformers A multi-phase transformer system is provided having a main transformer fed by an N-phase voltage and a separate auxiliary transformer fed by the N-phase voltage. Windings in the main transformer are connected to secondary windings in the auxiliary transfo...	07/23/2002
6335872	Nine-phase transformer The invention includes an autotransformer for converting three-phase AC power to nine-phase AC power. The autotransformer includes three coils, each coil including a plurality of serial windings that together form a polygon. Nine output nodes are provided...	01/01/2002
6275405	Motor drive circuit A phase converter for converting single-phase power to three-phase power, wherein the single-phase power is provided at a first and a second single-phase power terminal and the three-phase power is provided to a first, a second and a third three-phase pow...	08/14/2001
6198647	Twelve-phase transformer configuration The invention includes an autotransformer for converting three-phase AC power to twelve-phase AC power using only three coils (e.g., no primary or dead windings are required). The autotransformer includes three coils, each coil including a plurality of se...	03/06/2001
6169674	Transformer, system and method to control harmonic distortion Harmonic distortion in a multiple phase power system is controlled by enabling different phase relationships to be set, and changed, in the field, between the devices being energized and the power source providing the energization. This has particular app...	01/02/2001
5731971	Apparatus for providing multiple, phase-shifted power outputs An apparatus provides multiple, phase-shifted power outputs, such as for driving a rectifier circuit of an electronic frequency converter. The apparatus connects to a multi-phase power source having a predetermined number of phases, such as a conventional...	03/24/1998
5539632	Multi-phase and shifted phase power distribution systems An arrangement for transforming electrical power is disclosed. An embodiment of the arrangement includes conductors for electrically connecting to an input source of three phase electrical power. This embodiment of the arrangement also includes a transfor...	07/23/1996
5187654	Rotary phase converter A rotary phase converter for connection to a single AC power source intended to supply triphase current to a triphase electrical load with minimum current and voltage imbalances. Furthermore, it is not necessary to adjust the equipment as the load changes...	02/16/1993
5107410	Multi-phase and shifted phase power distribution systems A method and apparatus for providing a source of alternating current electrical power to a plurality of loads in an office environment, including a plurality of non-linear loads which draw power for only a portion of the alternating current cycle, include...	04/21/1992
5070441	Distribution of power from a six phase powerline to one- and three- phase loads Apparatus and method are provided for distributing electrical power from a six phase powerline to both single phase and three phase loads. The invention provides for improved power transmission efficiency, and offers compatibility between an installed bas...	12/03/1991
5063487	Main and auxiliary transformer rectifier system for minimizing line harmonics A polyphase transformer design is presented in which transformer output pors are accurately constructed in both voltage magnitude and relative phase angle. The design incorporates both main and auxiliary transformers that are used in unison to produce th...	11/05/1991
5036448	DC to AC inverter and method for producing three phases from two input phases A three phase inverter (10) in accordance with the invention includes a first phase inverter (12) producing a first phase AC output voltage from a DC power supply; a second phase inverter (14) producing a second phase AC output voltage which is displaced ...	07/30/1991
4901213	Five-legged core type frequency triplo-multiplier A magnetic frequency triplo-multiplier for use as a power source for metal melting furnaces and the like. The frequency triplo-multiplier has Y-connected primary windings that are resonant with each phase of a three-phase alternating-current power source ...	02/13/1990
4779181	Multiphase low harmonic distortion transformer A multiphase transformer is provided for converting an input signal having N phases into an output signal having M phases. The transformer includes a plurality of first windings connected together to provide a load for an N phase signal, with each of the ...	10/18/1988
4644241	Single phase to three phase signal converter An apparatus for converting a single phase electrical signal into a three phase electrical signal is disclosed. A converter includes a rectifier connectable to a single phase electrical power source. One output of the rectifier is connected through a smoo...	02/17/1987
4639610	Rotating flux transformer A rotating flux transformer having at least two magnetic cores, each in the form of a torus, with each magnetic core having poloidal and toroidal windings. The need for breaking the torus and bringing out leads from the poloidal winding is eliminated by p...	01/27/1987
4638177	Rotating flux transformer A rotating flux transformer which includes a magnetic core having poloidal primary and secondary windings and toroidal primary and secondary windings. Quadrature flux is produced in the magnetic core by connecting one end of the poloidal primary winding t...	01/20/1987
4618809	Apparatus for converting single-phase power to three-phase outputs An inverter apparatus for converting a single-phase A.C. power source to three-phase A.C. outputs is described wherein the single-phase power source is directly connected to a first phase load and is connected through a one-phase converter to a second pha...	10/21/1986

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Class 363/154 - Stationary