US2996656A - Voltage regulating apparatus - Google Patents

Voltage regulating apparatus Download PDF

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Publication number
US2996656A
US2996656A US790428A US79042859A US2996656A US 2996656 A US2996656 A US 2996656A US 790428 A US790428 A US 790428A US 79042859 A US79042859 A US 79042859A US 2996656 A US2996656 A US 2996656A
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voltage
winding
secondary winding
load
core
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Joseph G Sola
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Basic Products Corp
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Basic Products Corp
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/04—Regulating voltage or current wherein the variable is ac
    • G05F3/06—Regulating voltage or current wherein the variable is ac using combinations of saturated and unsaturated inductive devices, e.g. combined with resonant circuit

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  • This invention relates to voltage regulating apparatus and more particularly to a voltage regulating system comprising a high reactance transformer and one or more capacitors for regulating voltage to a load irrespective of load variations over a certain range thereof and irrespective of line supply voltage variations over a certain range thereof, and it is an object of the invention to provide improved apparatus of this character.
  • Constant voltage devices are known according to the patent, No. 2,143,745, to the same inventor as the subject application and the present invention is an improvement thereover.
  • Devices according to the prior patent have served and continue to serve satisfactorily a .wide variety of load and line supply voltage conditions.
  • a voltage regulating and more particularly a constant voltage apparatus to supply loads requiring very high currents relative to the voltage, 'these loads having to be supplied with a constant or regulated voltage even though the load may vary from no load to full load and even though the line supply voltage may vary over a rather wide range.
  • the indicated need has not been completely satisfied by devices according to the prior patent, and it is therefore a further object of the invention to provide improved devices which will satisfy it.
  • the basic problem with which the subject invention is concerned is one .of long standing. It is the problem of providing a constant or regulated voltage to a load from a particular source apparatus. There are two aspects to the problem, maintaining a constant voltage to a load when the line supply voltage varies, and maintaining a constant voltage at that load when the load current varies. The first of these aspects has been substantially solved by the patent, No. 2,143,745, already referred to.
  • a constant voltage transformer is disclosed which utilizes a secondary winding to which a capacitor is connected for providing a high degree of saturation in the core of the transformer associated with that winding, together with a compensating winding which is closely coupled with the primary winding to produce a constant voltage across a load for the voltages and currents ordinarily employed.
  • apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range comprising a core, primary winding disposed on said core and adapted to be supplied from said source with an alternating voltage of predetermined nominal value and frequency, a first secondary winding disposed on said core on one side of said primary winding, a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding, a capacitor connected across said first secondary winding, said capacitor having a capacity value which when taken in combination with said first secondary winding effects under operating conditions a flux density in the core interiorly of said first secondary winding substantially greater than the flux density in the core interiorly of said primary winding and sufiicient to produce a condition of substantial saturation in said first secondary winding core portion, a regulating secondary winding disposed on the other side of said primary winding, a second high reluctance magnetic shunt disposed
  • FIGURE 1 is a plan view, partially in section, of one form of transformer which may be utilized in carrying out the invention.
  • FIG. 2 is a circuit diagram showing the electrical connections of the transformer of FIG. 1, together with other circuit components forming one embodiment of the invention.
  • a transformer 10 including a primary winding 11, a secondary winding 12, a winding 13 closely coupled to secondary winding 12, a secondary winding 14, a winding 15 closely coupled to secondary winding 14, and an iron core 16.
  • the core 16 is shown as being of the shell type having a central leg 17 and an outer'shell consisting of side legs 18 and '19 and end legs 21 and 22. As shown, the core is formed of the desired stack height from a series of E and I laminations laid together in lap joints for good magnetic circuitry. This is of course exemplary and other forms of cores may be used, such for example as cores wherein the central leg 17 is punched from an integrally formed outer lamination.
  • the windings 11, 12, 13, 14 and 15 may, of course, be form-wound and appropriately disposed on the central leg 17 during the assembly process.
  • a high reluctance magnetic shunt consisting of iron portions 23 and 24, together with air or other nonmagnetic gaps 23a, 23b and 24a and 24b, respectively.
  • a high reluctance magnetic shunt consisting of iron portions 25 and 26 and air or other nonmagnetic gaps 25a and 25b and 26a and 26b, respectively.
  • the high reluctance shunts 23, 23a, 23b and 24, 24a, 2417 between the primary winding 11 and the secondary winding 12 provide a leakage flux path whereby a certain portion of the iluxes of each of these two windings may link the particular winding to the exclusion of the other.
  • the high reluctance shunts 25, 25a, 25b and 26, 26a, 26b provide a leakage path between the primary winding 11 and the secondary winding 14 whereby a certain portion of the fluxes of each of these windings may link the particular winding to the exclusion of the other.
  • the core provides a high leakage reactance for each of the primary windings and secondary windings.
  • Other well-known constructions for obtaining a leakage flux path may of course be used.
  • the secondary winding 13 forms a load secondary winding and is closely coupled to the secondary winding 12. Since one principal embodiment of the subject invention is that form providing a DC. load with relatively high currents compared to to voltage, it is desired that there be a minimum amount of resistance in the windings supplying the load. For this reason the secondary winding 13 is wound adjacent the central leg of the core 17 and is interiorly disposed of the secondary winding 12. Thus the length of the winding 13 is reduced and its resistance is therefore maintained at a minimum.
  • the secondary winding is a regulating winding and is closely coupled to the secondary winding 14, and thereby reflect's the flux condition existing in the secondary winding 14.
  • the secondary winding 15 also is wound adjacent the central leg 17 of the core interiorly of the winding 14 to maintain its resistance as low as possible. As will be subsequently explained in this specification, the secondary winding 15 performs its regulating function essentially independently of the voltage variations occurring in the primary winding 11. and also independently of the flux conditions existing With respect to the secondary winding 12.
  • Suitable insulation between the various windings themselves and between them and the transformer core is of course provided, and, by way of example, insulating pieces 27, 28 and 29 are shown between the primary winding 11, the secondary winding 13 and the secondary winding 15, respectively, and the central leg of the core 17.
  • FIG. 2 is a circuit diagram showing the connections for the various components.
  • the reference characters are the same as those used in FIG. 1 to designate corresponding parts.
  • the core 16 and the high reluctance shunts 23, 24 and 25', 26 together with their air gaps are shown schematically and the secondary windings 12 and 14 are shown disposed on opposite sides of the primary winding 1:1 with the shunts in between.
  • the primary winding 11 is shown connectible to a source S of alternating current having a predetermined nominal voltage 4 l and frequency such for example as volts at 60 cycles.
  • a capacitor 31 Connected across secondary winding 12 is a capacitor 31 which is related to the secondary winding 12 in such a manner as to produce a very high flux density or saturation in the portion A of the central leg 17 of the core immediately underneath the secondary winding 12.
  • the flux density in this portion of the core was of the order of 127,500 lines per square inch when the flux density in the portion B of the central leg 17 of the core immediately underneath the primary winding 11 was of the order of 98,000 lines per square inch, assuming a stacking factor of unity.
  • the high flux density in the portion A of the central leg 17 is brought about by the phenomena of ferro-resonance which can occur in the apparatus as shown at appropriate voltages because the high reluctance shunts 23, 23a, 23b, 24, 24a and 24b enable the flux generated by the secondary winding 12 to link itself to the exclusion of the primary winding 11.
  • the voltage across the secondary winding 12 and consequently the voltage across the secondary winding 13 are substantially independent of variations in the voltage across the primary winding 11.
  • the portion of the device thus far described relative to the primary winding 11, secondary windings 12 and 13 and the associated core portions form essentially a constant voltage device similar to that described in Patent No. 2,143,745.
  • a capacitor 32 Connected across the secondary winding 14 is a capacitor 32 which is related to the secondary winding 14 so as to produce a flux density in the portion C of the central leg 17 of the core immediately underneath the secondary winding 14 which is equal to or greater than the flux density associated with the primary portion B of the central leg 17, also due to ferro-resonant phenomena. It will be understood that because of the presence of the shunts 25, 25a, 25b and 26, 26a, 26b the flux density existing in the portion C of the central leg 17 may be less than the flux density in the portion B of the central leg 17 of the core 11 in the absence of the capacitor 32. Thus the presence of the capacitor 32 increases the flux density in the portion C of the central leg 17 to a value as desired in particular devices, as will subsequently become clear in this specification.
  • the secondary winding 15 being closely coupled to the secondary winding 14 reflects the flux condition therein and provides a regulating voltage in the circuit supplying the load as will be subsequently described.
  • the secondary winding 14 and the closely coupled winding 15 to be substantially independent of voltage variations in the primary winding 11.
  • the load supplied by the series combination of secondary windings 13 and 15 may be supplied with a regulated or a constant voltage irrespective of variations in current supplied to such load as will be subsequently described.
  • the voltage across such load will also, according to the invention, be independent of voltage variations in the source of supply connected to the primary winding 11 over the rated range.
  • the secondary winding 14 and the connected capacitor 32 while similar in circuitry to the secondary winding 12 and its connected capacitor 31, perform a substantially different function.
  • the winding 15 provides a regulating component voltage which when vectorially added to the voltage component of winding 13 provides a substantially constant voltage, for example, across the load 33 irrespective of variations in the supply to the primary winding 11 and irrespective of variations in the load 33 from no load to full load.
  • the windings 13 and 15 are connected in series with each other by means of the conductor 34, and the extremities of the windings 13 and 15 are connected to a bridge rectifier 35 through conductors 36 and 37 at terminals 39 and '40, respectively.
  • the load 33 was a pure resistance load supplied from the rectifier bridge 35 through a filter 3 8.
  • the load 33, the filter 38, and the rectifier bridge 35 may, of course, be considered as a load supplied from the windings 13 and 15 through conductors 36 and 37.
  • the load in the particular example described is a DC. load
  • the windings 13 and 15 may supply an A.C. load and suitable regulation characteristics according to the invention may be provided.
  • the rectifier bridge 35 is a full wave rectifier and, for example, consists of four rectifier units appropriately connected, which units may be of the germanium type, the four rectifier units being designated as 41, 42, 43 and 44.
  • the output of the rectifier appears at the terminals 45 and 46 and is supplied by means of the conductors 47 and 48 to the filter 38.
  • the filter 38 may consist, as shown, of two capacitors 49 and 51, between which is interposed an inductor or choke 52. At the exit of the filter 38 there is a bleed resistor 53 for a purpose to be described and from the bleed resistor 53 the conductors 54 and 55 extend to the load 33, the load terminals being 56 and 57.
  • the particular example of device which was actually constructed and operated, provided to the load 33 currents varying from zero to 40 amperes while the voltage across the load terminals 56 and 57 remained at volts. In the same setup, the voltage across the load 33 did not vary more than one percent for a permissible variation in the primary voltage from 95 volts to 125 volts.
  • the capacitors 49 and 51 in the said practical example each consisted of four units of 35,000 microfarads each and the choke coil 52 consisted of 24 turns of No. 5 square copper wire.
  • capacitors 49 and 51 provide an elfective filter for any ripple components in the output voltage and, in addition, enables the provision of a substantially square wave input to the rectifier terminals 39 and 40 whereby the rectifier operates at a high e-fiiciency. Any remaining ripple components in the rectifier output voltage are effectively eliminated by the choke coil 52. It was actually observed in the example being described by means of an oscilloscope that the voltage input at the terminals 39 and 40 of the rectifier was substantially a square wave when the load 33 was zero. However, when the load 33 was at its full value, a substantial ripple component could be observed in the voltage input at terminals 39 and 40, which ripple did not appear at terminals 56 and 57.
  • the function of the bleeder resistor 53 is to cause a continuous load current through the rectifier even though the current going through load '33 may be zero. In this manner the rectifier is operating on the most linear portion of its characteristic. There is a drop in voltage across the rectifier units whenever there is current flowing, and even though it tends to be constant over a certain current range it nevertheless increases, and likewise there is an increase in voltage drop across filter choke 52 whenever the current therethrough increases, and
  • the voltage across winding 13 at no load was 14 volts when the primary Winding was connected to a source of supply of volts at 60cycles. At a full load of 36 amperes DC. in load 33, the voltage across winding 13 was 12.8 volts. Under similar conditions at no load, the voltage across the regulating winding 15 was 4 volts and at full load the voltage across the regulating winding was 4.43 volts. In the said particular device, the voltage of winding 15 was connected in bucking relationship to the voltage of winding 13 in the circuit supplying the load.
  • the primary winding 11 consisted of turns of #14 copper wire
  • the secondary winding 12 consisted of 480 turns of #116 copper wire
  • the secondary winding 13 consisted of 12 turns of double #6 square copper wire
  • the secondary winding .14 consisted of 460 turns of #20 copper wire
  • the secondary winding 15 consisted of 4 turns of double #7 square copper wire.
  • the capacitor 31 was of 10 microfarads and the capacitor 32 was of 2.25 microfarads.
  • the core 16 consisted of a stack 2 7 inches in height of transformer steel 26 gauge designated as M22 cold reduced by the manufacturer thereof.
  • the exterior dimensions of the core along the sides 18 and 19 were 7% inches whereas the length along the ends 21 and 22 was 5% inches.
  • the width of the central leg 17 was 1% inches whereas the width of the outside legs 18 and 19 and the width of the end legs 21 and 22 was /s of an inch.
  • the shunt members 23, 24, .25 and 26 were of the same height as the thickness of the stack and each had a width of A; of an inch.
  • the length of the shunts 23 and 24 was such as to provide an air gap 23a, 23b, and an air gap 24a, 241) each totaling .039 inch, and the length of the shunts 25 and 26 was such as to provide an air gap 25a, 25b and an air gap 26a, 26b each totaling .050 inch.
  • the filter choke had a nonmagnetic gap in the magnetic circuit of .030 inch filled with insulating fiber.
  • the rated range of primary voltage variation of the device made and tested was from 95 volts to 125 volts.
  • the voltage existing across terminals 56 and 57 was 10.10 volts and at full load this same voltage was 9.95 volts or a decrease of about 1 /2 percent.
  • the voltage across terminals 56 and 57 was 10.05 volts and at full load this same voltage was 9.90 volts or a decrease of about 1 /2 percent.
  • the voltage vectors of the windings 13 and 15 shift relative to each other with difierent load currents so that the combination of the two vectors results in the voltage increase desired.
  • the phase shift in these two voltages is enabled to take place because of the fact that the windings 12 and 14 are isolated from each other and from the primary winding due to the high reluctance shunts 23, 24 and 25, 26.
  • the winding 15 is inductive, even though coupled to the winding 14 across which a capacitor 32 is connected, relative to the winding 13 which supplies the principal component of the load voltage, and thus when leading current from winding 13 is flowing through the inductive winding 15 a voltage rise is produced.
  • a balance must be achieved between the various components of the circuit, namely, the number of turns in the windings, the dimensions of the air gaps, the microfarad values of the capacitors and the dimensions of the iron core.
  • variations may be selected in each of the components indicated. Irrespective of what changes are selected in these components, it is however essential that the regulating winding 15 and the winding 14 to which it is coupled, be on the opposite side of the primary winding from the secondary winding 12 and moreover be separated from the primary winding by a shunt such as high reluctance shunts 25 and 26 and the associated air gaps.
  • winding 15 and the winding 14 may act independently of the primary winding 11 depending upon the degree of saturation or ferro-resonance existing in the circuit defined by the winding 14 and capacitor 32.
  • windings 13 and 15 are not essential as such but a certain number of turns may be tapped from winding 12 in place of winding 13 and a certain number of turns may be tapped from winding 14 in place of winding 15. The number oftapped turns from winding 12 and from winding 14 will then be connected in series to supply the load.
  • a tap 58 and a tap 59 are shown on windings 13 and 15, respectively, for adjustment purposes.
  • Apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range
  • a core a primary winding disposed on said core and adapted to be supplied from said source with an alternating voltage of predetermined nominal value and frequency, a first secondary winding disposed on said core on one side of said primary winding, a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding, a capacitor connected across said first secondary winding, said capacitor having a capacity value which when taken in combination with said first secondary winding efi'ects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the flux density in the core associated with said primary winding and sufiicient to produce a condition of substantial saturation in said first secondary winding core portion, a regulating secondary winding disposed on the other side of said primary winding, a second high reluctance magnetic shunt
  • Apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range
  • a core a primary winding disposed on said core and adapted to be supplied from such source with an alternating voltage of predetermined nominal voltage and frequency, a first secondary winding disposed on said core along one side of said primary winding, a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding, a capacitor connected across said first secondary winding, said capacitor having a capacity value which when taken in combination with said first secondary winding effects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the flux density in the core associated with said primary winding and suflicient to produce a condition of substantial saturation in said first secondary Winding core portion, a second secondary winding disposed on said core on the other side of said primary winding, a second high reluctance magnetic shunt disposed between said primary winding and
  • Apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range
  • a core a primary winding disposed on said core and adapted to be supplied from such source with an alternating voltage of predetermined nominal voltage and frequency
  • a first secondary winding disposed on said core along one side of said primary winding
  • a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding
  • a capacitor connected across said first secondary winding said capacitor having a capacity value which when taken in combination with said first secondary winding efiects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the flux density in the core associated with said primary winding and sufficient to produce a condition of substantial saturation in said first secondary winding core portion
  • a second secondary Winding disposed on said core on the other side of said primary winding, a second high reluctance magnetic shunt disposed between said
  • Apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range
  • a core a primary winding disposed on said core and adapted to be supplied from such source with an alternating voltage of predetermined nominal value and frequency
  • a first secondary winding disposed on said core on one side of said primary winding
  • a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding
  • a first capacitor connected across said first secondary winding said first capacitor having a capacity value which when taken in combination with said load secondary winding efiects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the flux density in the core associated with said primary winding and sufficient to produce a condition of substantial saturation in said first secondary winding core portion
  • a second secondary winding disposed on said core on the other side of said primary winding, a second high reluctance magnetic shunt disposed
  • Apparatus for supplying a substantially constant voltage to a load which may be variable over a certain range from a source of alternting voltage which also may be variable over a certain range comprising a core, a pri mary winding disposed on said core and adapted to be supplied from such source with an alternating voltage of predetermined nominal voltage and frequency, a first secondary winding disposed on said core along one side of said primary winding, a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding, a capacitor connected across said first secondary winding, said capacitor having a capacity value when taken in combination with said first secondary winding effects under operating conditions a fiux density in the core associated with said first secondary winding substantially greater than the fiux density in the core associated with said primary winding and sufiicient to produce a condition of substantial saturation in said first secondary winding core portion, a second secondary winding disposed on said core on the other side of said primary winding, a second high reluctance magnetic shunt disposed between
  • Apparatus for supplying a substantially constant voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range comprising a core, a primary winding disposed on said core and adapted to be supplied from such source with an alternating voltage of predetermined nominal voltage and frequency, a first secondary winding disposed on said core along one side of said primary winding, a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding, a capacitor connected across said first secondary winding, said capacitor having a capacity value which when taken in combination with said first secondary winding efiects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the flux density in the core associated with said primary winding and sufiicient to produce a condition of substantial saturation in said first secondary winding core portion, a second secondary winding disposed on said core on the other side of said primary winding, a second high reluctance magnetic shunt disposed
  • Apparatus for supplying a substantially constant voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range
  • a core a primary winding disposed on said core and adapted to be supplied from said source with an alternating voltage of predetermined nominal value and frequency
  • a first secondary winding disposed on said core on one side of said primary winding
  • a first high reluctance magnetic shunt disposed between said,primary winding and said first secondary winding
  • a first capacitor connected across said first secondary winding said first capacitor having a capacity value which when taken in combination with said first secondary winding effects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the fiux den sity in the core associated with said primary winding and sufiicient to produce a condition of substantial saturation in said first secondary winding core portion
  • a second secondary winding disposed on said core on the other side of said primary winding, a second high reluctance magnetic
  • Apparatus for supplying a substantially constant voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range comprising a core having a central leg and two outer legs, a primary winding disposed on said central leg and adapted to be supplied from said source with an alternating voltage of predetermined nominal value and frequency, a first secondary winding disposed on said central leg on one side of said primary winding, a first high reluctance magnetic shunt disposed between said primary winding and said first secondary winding, a first capacitor connected across said first secondary winding, said first capacitor having a capacity value which when taken in combination with said first secondary winding effects under operating conditions a flux density in the core associated with said first secondary winding substantially greater than the flux density in the core portion associated with said primary winding and sufiicient to produce a condition of substantial saturation in said first secondary winding core portion, a second secondary winding disposed on said central leg on the other side of said primary winding, a second high
  • Apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range comprising first and second transformer means excitable from said source with an -alter nating voltage of predetermined nominal value and frequency, said first and second transformer means each including core means, a secondary winding and voltage phase shifting means, said secondary windings being connected in series for supplying such load and each of said voltage phase shifting means comprising a winding closely coupled to the respective one of said secondary windings and a capacitor connected thereacross, and each of said phase shifting means having a relationship between the closely coupled winding and capacitor thereof so as to produce under operating conditions an increased flux density in the core portion associated therewith relative to the excitation flux density thereof.
  • Apparatus for supplying a regulated voltage to a load which may be variable over a certain range from a source of alternating voltage which also may be variable over a certain range comprising load and regulating transformer means excitable from said source with an alter nating voltage of predetermined nominal value and frequency, said load and regulating transformer means each including core means, a secondary winding and voltage phase shifting means, said secondary windings being connected in series bucking relationship for supplying such load and each of said voltage phase shifting means comprising a winding closely coupled to the respective one of said secondary windings and a capacitor connected thereacross, the phase shifting means associated with said load transformer means having a relationship between the closely coupled winding and capacitor thereof so as to produce under operating conditions a flux density in the core portion associated therewith substantially greater than excitation flux density thereof and suificient to produce a condition of substantial saturation in said core portion and the phase shifting means associated with said regulating transformer means having a relationship between the closely coupled winding and capacitor thereof so as to produce under operating conditions a flux density in the core portion associated

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FR817228A FR1246628A (fr) 1959-02-02 1960-02-01 Appareil régulateur de tension électrique

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159766A (en) * 1961-01-03 1964-12-01 Gen Electric Ballast apparatus and system for dimming arc discharge lamps
DE1246121B (de) * 1964-04-10 1967-08-03 Frako Kondensatoren Und Appbau Vorschaltgeraet fuer Gasentladungslampen
US3371263A (en) * 1961-09-21 1968-02-27 Messrs Frako Kondensatoren Und Stabilized mains rectifying circuit arrangement
US3389329A (en) * 1965-06-22 1968-06-18 Transformer Engineers Inc Constant output voltage transformer
US3454868A (en) * 1961-09-21 1969-07-08 Frako Kondensator Apparate Constant potential transformer
US3456223A (en) * 1967-09-15 1969-07-15 Gen Electric Voltage stabilizing transformer with variable air gap characteristics
US3548292A (en) * 1966-12-24 1970-12-15 Dominitwerke Gmbh Single core magnetic voltage regulator
US4045717A (en) * 1975-03-17 1977-08-30 General Battery Corporation Battery charger
US4080725A (en) * 1974-06-26 1978-03-28 Thomas & Skinner, Inc. Ferromagnetic core with variable shunt air gap and method of making it
US4262245A (en) * 1979-01-30 1981-04-14 Rca Corp. High frequency ferroresonant transformer
US4943763A (en) * 1988-09-08 1990-07-24 Albar, Inc. Ferroresonant transformer with dual outputs
US5912553A (en) * 1997-01-17 1999-06-15 Schott Corporation Alternating current ferroresonant transformer with low harmonic distortion
US20110198932A1 (en) * 2010-02-18 2011-08-18 Alpha Technologies Inc. Ferroresonant transformer for use in uninterruptible power supplies
US9030045B2 (en) 2011-01-23 2015-05-12 Alpha Technologies Inc. Switching systems and methods for use in uninterruptible power supplies
US9234916B2 (en) 2012-05-11 2016-01-12 Alpha Technologies Inc. Status monitoring cables for generators
US10074981B2 (en) 2015-09-13 2018-09-11 Alpha Technologies Inc. Power control systems and methods
US10381867B1 (en) 2015-10-16 2019-08-13 Alpha Technologeis Services, Inc. Ferroresonant transformer systems and methods with selectable input and output voltages for use in uninterruptible power supplies
US10635122B2 (en) 2017-07-14 2020-04-28 Alpha Technologies Services, Inc. Voltage regulated AC power supply systems and methods
US11206722B2 (en) 2017-09-01 2021-12-21 Trestoto Pty Limited Lighting control circuit, lighting installation and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2143745A (en) * 1938-08-31 1939-01-10 Sola Electric Co Constant potential transformer
US2870398A (en) * 1957-05-20 1959-01-20 Basic Products Corp Transformer for starting and operating metallic vapor discharge devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2143745A (en) * 1938-08-31 1939-01-10 Sola Electric Co Constant potential transformer
US2870398A (en) * 1957-05-20 1959-01-20 Basic Products Corp Transformer for starting and operating metallic vapor discharge devices

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159766A (en) * 1961-01-03 1964-12-01 Gen Electric Ballast apparatus and system for dimming arc discharge lamps
US3371263A (en) * 1961-09-21 1968-02-27 Messrs Frako Kondensatoren Und Stabilized mains rectifying circuit arrangement
US3454868A (en) * 1961-09-21 1969-07-08 Frako Kondensator Apparate Constant potential transformer
DE1246121B (de) * 1964-04-10 1967-08-03 Frako Kondensatoren Und Appbau Vorschaltgeraet fuer Gasentladungslampen
US3389329A (en) * 1965-06-22 1968-06-18 Transformer Engineers Inc Constant output voltage transformer
US3548292A (en) * 1966-12-24 1970-12-15 Dominitwerke Gmbh Single core magnetic voltage regulator
US3456223A (en) * 1967-09-15 1969-07-15 Gen Electric Voltage stabilizing transformer with variable air gap characteristics
US4080725A (en) * 1974-06-26 1978-03-28 Thomas & Skinner, Inc. Ferromagnetic core with variable shunt air gap and method of making it
US4081777A (en) * 1974-06-26 1978-03-28 Thomas & Skinner, Inc. Ferromagnetic core with variable shunt air gap
US4045717A (en) * 1975-03-17 1977-08-30 General Battery Corporation Battery charger
US4262245A (en) * 1979-01-30 1981-04-14 Rca Corp. High frequency ferroresonant transformer
US4943763A (en) * 1988-09-08 1990-07-24 Albar, Inc. Ferroresonant transformer with dual outputs
US5912553A (en) * 1997-01-17 1999-06-15 Schott Corporation Alternating current ferroresonant transformer with low harmonic distortion
US10819144B2 (en) 2010-02-18 2020-10-27 Alpha Technologies Services, Inc. Ferroresonant transformer for use in uninterruptible power supplies
US8575779B2 (en) 2010-02-18 2013-11-05 Alpha Technologies Inc. Ferroresonant transformer for use in uninterruptible power supplies
US9633781B2 (en) 2010-02-18 2017-04-25 Alpha Technologies Inc. Ferroresonant transformer for use in uninterruptible power supplies
US20110198932A1 (en) * 2010-02-18 2011-08-18 Alpha Technologies Inc. Ferroresonant transformer for use in uninterruptible power supplies
US9030045B2 (en) 2011-01-23 2015-05-12 Alpha Technologies Inc. Switching systems and methods for use in uninterruptible power supplies
US9812900B2 (en) 2011-01-23 2017-11-07 Alpha Technologies Inc. Switching systems and methods for use in uninterruptible power supplies
US10355521B2 (en) 2011-01-23 2019-07-16 Alpha Technologies Services, Inc. Switching systems and methods for use in uninterruptible power supplies
US9234916B2 (en) 2012-05-11 2016-01-12 Alpha Technologies Inc. Status monitoring cables for generators
US10074981B2 (en) 2015-09-13 2018-09-11 Alpha Technologies Inc. Power control systems and methods
US10790665B2 (en) 2015-09-13 2020-09-29 Alpha Technologies Services, Inc. Power control systems and methods
US10381867B1 (en) 2015-10-16 2019-08-13 Alpha Technologeis Services, Inc. Ferroresonant transformer systems and methods with selectable input and output voltages for use in uninterruptible power supplies
US10635122B2 (en) 2017-07-14 2020-04-28 Alpha Technologies Services, Inc. Voltage regulated AC power supply systems and methods
US11206722B2 (en) 2017-09-01 2021-12-21 Trestoto Pty Limited Lighting control circuit, lighting installation and method

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FR1246628A (fr) 1960-11-18

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