Plural Load Devices Patents (Class 315/144)
  • Patent number: 9214272
    Abstract: A three-phase-two-phase transformer including a magnetic circuit, three-phase windings, and two-phase windings, wherein the magnetic circuit includes a first column, a second column, and a third column that are magnetically connected together, the three-phase windings including a first winding, a second winding, and a third winding. The two-phase windings include a fourth winding around the first column, a fifth winding around the first column, a sixth winding around the third column, and a seventh winding around the third column, the fourth winding and the seventh winding being connected in series and forming a first two-phase phase, and the fifth winding and the sixth winding being connected in series and forming a second two-phase phase.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: December 15, 2015
    Assignee: LABINAL POWER SYSTEMS
    Inventor: Cedric Duval
  • Patent number: 8901824
    Abstract: The invention relates to a current converter of the forward converter type for converting a three-phase primary voltage into a plurality of secondary voltages, with a magnetic intermediate circuit including at least three transformer secondary windings, wherein the current converter on its primary side includes at least three transformers with respectively two primary windings wound in opposition directions and respectively at least one secondary winding, and that two electronic switches are provided, wherein the first switch respectively controls a primary winding of the three transformers via a set of diodes and wherein the second switch respectively controls another primary winding of the three transformers via a second set of diodes.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: December 2, 2014
    Assignee: ITT Water & Wastewater Herford GmbH
    Inventor: Jan Boris Loesenbeck
  • Patent number: 8791639
    Abstract: The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: July 29, 2014
    Inventor: Tai-Her Yang
  • Publication number: 20130221854
    Abstract: The invention relates to a current converter of the forward converter type for converting a three-phase primary voltage into a plurality of secondary voltages, with a magnetic intermediate circuit including at least three transformer secondary windings, wherein the current converter on its primary side includes at least three transformers with respectively two primary windings wound in opposition directions and respectively at least one secondary winding, and that two electronic switches are provided, wherein the first switch respectively controls a primary winding of the three transformers via a set of diodes and wherein the second switch respectively controls another primary winding of the three transformers via a second set of diodes.
    Type: Application
    Filed: July 26, 2011
    Publication date: August 29, 2013
    Applicant: ITT WATER & WASTEWATER HERFORD GMBH
    Inventor: Jan Boris Loesenbeck
  • Patent number: 8513890
    Abstract: The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: August 20, 2013
    Inventor: Tai-Her Yang
  • Publication number: 20120256547
    Abstract: The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.
    Type: Application
    Filed: September 7, 2011
    Publication date: October 11, 2012
    Inventor: Tai-Her YANG
  • Publication number: 20120256546
    Abstract: The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.
    Type: Application
    Filed: April 6, 2011
    Publication date: October 11, 2012
    Inventor: Tai-Her YANG
  • Patent number: 8247990
    Abstract: An apparatus, method, and system for switch control of power to light sources, particularly high power consumption light sources that may experience lumen depreciation, such that the power level to a light source may be increased or decreased as desired. Methods of switching utilizing robust mechanical components such as solenoids, coupled with accurate and rapid electronic control components such as microprocessors, may be combined with a combinational approach to capacitance changes to comprise a flexible method of power control to a light source or plurality of light sources. Power to a light source may be adjusted such that the amount of energy consumed and the quantity of light output may be adjusted, compensation may be made for lumen depreciation and other losses that occur during operational life of the light source, to maintain constant or near-constant light output, or otherwise.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: August 21, 2012
    Assignee: Musco Corporation
    Inventors: Myron Gordin, Timothy J. Boyle, Gregory N. Kubbe, Gabriel P. Gromotka
  • Patent number: 7982404
    Abstract: One aspect of the present invention is a non-electronic method of controlling the power provided to the lamp through use of multiple secondary taps off the secondary side of the HID ballast. This allows for a base capacitor to be used, along with the multiple secondary taps of the ballast, to vary the power to the lamp for purposes of providing constant light output, dimming capabilities, or to hold the power constant, or any combination of such.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: July 19, 2011
    Assignee: Musco Corporation
    Inventor: Myron K. Gordin
  • Patent number: 6593707
    Abstract: Two high-pressure discharge lampbanks and transformers thereof are connected via a cross connection manner. The two lamp banks include the same number of high-pressure discharge lamps, and the transformers are in a number corresponding to that of lamps in each lamp bank. All the transformers have two outputs, namely, first and second outputs, at a secondary side thereof. First outputs of all the transformers are separately connected to the lamps in a first one of the two high-pressure discharge lamp banks while second outputs of all the transformers are separately connected to the lamps in a second one of the two high-pressure discharge lamp banks. Thereby, lamps in the same lamp bank are maintained at a voltage having the same phase and have a small potential difference among them to avoid interference noises.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: July 15, 2003
    Assignee: Hwa Young Co., Ltd.
    Inventor: Wen-Chu Shih
  • Patent number: 6515427
    Abstract: The inverter for multi-tube type backlight includes two step-up transformers of one-side grounded type, wherein the two step-up tranformers respectively output electric power to one or a plurality of cold cathode tubes, and wherein outputs of the two step-up tranformers are of identical frequency but of mutually reversed phases.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: February 4, 2003
    Assignee: Advanced Display Inc.
    Inventors: Hisaharu Oura, Hironori Takaoka
  • Patent number: 6118227
    Abstract: A high-frequency power supply system for a plurality of fluorescent tubes includes an inverter type power supply connected to the primary side of the high-voltage transformer. The secondary side of the high-voltage transformer includes two high-voltage coils arranged to provide power to four hot cathode fluorescent tubes, wherein each of said high-voltage coils is connected to two of said hot cathode fluorescent tubes connected in parallel. The secondary side of the high-voltage transformer also includes supplemental coils arranged to heat filaments of the hot cathode fluorescent tubes. The power supply also includes at least one capacitor and at least one inductor connected to the secondary side and arranged in a manner that the secondary side provides power to a substantially resistive load.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: September 12, 2000
    Assignee: Transfotec International LTEE
    Inventor: Robert Beland
  • Patent number: 5936359
    Abstract: Remote ballasting apparatus adapted for insertion between a high frequency power source and one or more gaseous discharge lamps. The ballasting apparatus includes an isolation transformer having a primary winding adapted for connection to the high frequency power source, a low capacitance power transmission line having an output end adapted for connection to the one or more gaseous discharge lamps, and current limiting means, such as an inductor or a capacitor or a series resonant circuit connected between the secondaries of the isolation transformer and the input end of the low capacitance power transmission line.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: August 10, 1999
    Assignee: Trojan Technologies, Inc.
    Inventor: J. Alan Gibson
  • Patent number: 5410220
    Abstract: The invention relates to an electronic ballast for a discharge lamp, comprising a drive circuit supplying high-frequency current to the lamp and including two power switches (V1, V2) and control circuits therefor for controlling the power switches, such that the parallel half-waves of the lamp current pass through a first power switch (V1) and the reverse half-waves through a second power switch. Each power switch (V1; V2) is provided with its own, independently operating control circuit and each control circuit is provided with means (R1, R3, R8, R7) for sensing a current passing through and a voltage prevailing across the appropriate power switch (V1; V2) as well as with means (V3; V4) for controllably bringing the appropriate power switch (V1; V2) to a conducting state as a certain voltage prevails thereacross and to a non-conducting state as soon as a current passing therethrough reaches a certain threshold value (Ik; Ikl).
    Type: Grant
    Filed: September 16, 1993
    Date of Patent: April 25, 1995
    Assignee: Oy Helvar
    Inventor: Kari von Hertzen
  • Patent number: 5325298
    Abstract: A method for generating context vectors for use in a document storage and retrieval system. A context vector is a fixed length list of component values generated to approximate conceptual relationships. A context vector is generated for each word stem. The component values may be manually determined on the basis of conceptual relationships to word-based features for a core group of word stems The core group of context vectors are used to generate the remaining context vectors based on the proximity of a word stem to words and the context vectors assigned to those words. The core group may also be generated by initially assigning each core word stem a row vector from an identity matrix and then performing the proximity based algorithm. Context vectors may be revised as new records are added to the system, based on the proximity relationships between word stems in the new records.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: June 28, 1994
    Assignee: HNC, Inc.
    Inventor: Stephen I. Gallant
  • Patent number: 4745340
    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.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: May 17, 1988
    Assignee: Herbert F. Koether
    Inventor: Michael J. Wanasz
  • Patent number: 4740731
    Abstract: Apparatus for sequentially igniting and serially operating a pair of electric discharge lamps from a source of AC supply voltage. The apparatus includes a transformer with a primary winding and first and second secondary windings mounted on a magnetic core having a slot under the second secondary winding. The first secondary winding has a high leakage reactance and the windings are serially connected with the secondary windings wound in opposition to one another. First and second capacitors are connected in series with the first and second lamps, respectively, to prevent the flow of DC current therethrough. By a novel choice of the ratios of the capacitance values of the second capacitor to the first capacitor and of the slot dimensions, superior operating characteristics for the apparatus are achieved.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: April 26, 1988
    Assignee: Advance Transformer Company
    Inventor: Joseph A. Crawford
  • Patent number: 4733136
    Abstract: During operation of ionized vapor discharge lamps and the partial load range, the lamp current is reduced from the rated value, the drop in voltage is measured during and after the reduction of the lamp current, and when the period of constant voltage that follows the drop in voltage is reached, the lamp current is increased accompanied by simultaneous determination of the increase in voltage. The lamp current is thereupon controlled in such a way that during the partial load range operation of the lamp, the voltage value is slightly greater than that of the voltage of the period of constant voltage.
    Type: Grant
    Filed: December 18, 1985
    Date of Patent: March 22, 1988
    Inventor: Volker Schaft
  • Patent number: 4220895
    Abstract: A network for the development of a square wave in a first time period as set by the timing occurrence of a first voltage to a predetermined threshold level and another network for the development of a square wave in a second time period as set by the timing occurrence of a second voltage to a predetermined threshold level. One square wave is chopped at a high frequency rate and the second square wave is chopped at the same high frequency rate, but by a chopping signal which is polarity inverted in phase from the first chopping signal. One of the chopped signals is polarity inverted before being combined with the other chopped signal to form a composite voltage. Separate lamp control networks can select between the two chopped signals to control dimming networks. The two chopped signals can overlap in time occurrence without interfering with the operation of each other.
    Type: Grant
    Filed: August 25, 1978
    Date of Patent: September 2, 1980
    Assignee: Esquire, Inc.
    Inventor: Eric L. H. Nuver
  • Patent number: 4009387
    Abstract: An automatically variable d.c. voltage source supplies a control signal to a dimmer circuit that controls the brightness of a high intensity gas discharge lamp in response to a varying d.c. voltage. The automatically variable d.c. voltage source produces a varying d.c. voltage at its output which is functionally related to the difference between a voltage from a stable reference voltage source and a voltage produced by a photocell circuit which is responsive to the light level of an area illuminated by the lamp controlled by the dimmer circuit. The variable d.c. source includes circuitry for indicating relamping conditions.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: February 22, 1977
    Assignee: Esquire, Inc.
    Inventor: Eric L. H. Nuver