US3683269A - Parametric voltage regulator with high power transfer capacity - Google Patents

Parametric voltage regulator with high power transfer capacity Download PDF

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Publication number
US3683269A
US3683269A US750914A US3683269DA US3683269A US 3683269 A US3683269 A US 3683269A US 750914 A US750914 A US 750914A US 3683269D A US3683269D A US 3683269DA US 3683269 A US3683269 A US 3683269A
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Prior art keywords
winding
circuit
input
output
coupling
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Expired - Lifetime
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US750914A
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English (en)
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Sylvan D Wanlass
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WANLESS ELECTRIC CO
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WANLESS ELECTRIC CO
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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
    • 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

Definitions

  • ABSTRACT A voltage regulator in which power is transferred to the resonant circuit ofa parametric device by both the parametric mechanism and either flux coupling or direct coupling or both.
  • the device includes a core on which are wound an input winding and at least one output winding which forms part of the resonant circuit. This winding is parametrically coupled to the input winding.
  • Another output winding on the core is connected into the resonant circuit and flux coupled to the input winding, or alternately, the input can be directly coupled into the resonant circuit. In either case, the resonant frequency of the resonant circuit is the same as that of the input voltage.
  • 3,403,323 comprises a magnetic core having a pair of windings thereon.
  • the core is constructed so that it has four common regions or legs and two end or joining portions for magnetically coupling the common regions.
  • the coils are wound on the end portions with their axes displaced at 90 so that normally there is no mutual inductive coupling between them, and so that the flux components generated as a result of passing currents through the two windings are at all times in opposing relationship in two of the legs and in additive relationship in the other two legs.
  • the current in one of the windings referred to as the control winding
  • the control winding generates a magnetic flux which controls the reluctance of the magnetic circuit encompassed by the second winding, referred to as the load winding, in such a manner that variations in this flux caused by variations in the current in the control winding cause the hysteresis loop of the magnetic circuit encompassed by the load winding to be effectively rotated thereby varying the inductance of the load winding.
  • the inductance varies at twice the frequency of an alternating current applied to the control winding.
  • a circuit which is capable of transferring large amounts of power while regulating the voltage. This is accomplished by providing a circuit in which power transfer is accomplished in two modes by parametric coupling and by flux coupling or direct coupling or a combination of the latter two. It has been found that if the tank circuit of a parametric regulator such as that described in U.S. application Ser. No. 589,780 is expanded to include a winding which is flux coupled to the input winding of the parametric regulator, or is directly coupled to the input, substantially greater amounts of power can be transferred through the device without any appreciable loss in the regulating characteristics of the device. Of course, the bilateral filtering capability of the device is greatly reduced but in many applications, this particular feature is not necessary.
  • FIG. 1 is a perspective view of a voltage regulator according to the present invention
  • FIG. 2 is a schematic diagram of the voltage regulator of FIG. 1;
  • FIG. 3 is a schematic diagram of a modification of the voltage regulator of the present invention.
  • an unregulated AC. input voltage is applied to terminals 12 and 13.
  • the control winding 14 of a variable inductor 15 of the type described is connected across the input terminals 12 and 13.
  • the parametrically coupled load winding 16 of the inductor is connected in series with a winding 17 which is wound on the core of the inductor such that it is flux coupled to the winding 14 in the manner of a conventional transformer.
  • a capacitor 18 is coupled across the windings 16 and 17 to form a resonant circuit.
  • the resonant circuit 16, 17, 18 is preferably tuned to the frequency of the input voltage.
  • these load terminals are connected only across a portion of the winding 16 although the capacitor is connected across the entirety of the windings 16 and 17. This arrangement permits the capacitor 16 to be operated at a higher voltage where it is more efficient while maintaining the voltage across the load at a lower value.
  • FIG. 3 shows a circuit generally similar to that shown in FIG. 2, the only exception being that the winding 17 is deleted and the tank circuit 16, 18 directly connected to the input terminals 12 and 13.
  • the winding 16 acts as an autotransformer because the output terminals 19 and 20 are connected across only a portion of it; however, it should be understood that the output terminals could be connected across the whole of winding 16.
  • power is transferred by a combination of flux coupling and direct coupling,
  • the power transfer would be substantially a combination of direct coupling and parametric coupling.
  • the power is coupled into the tank circuit of the parametric device which must be able to store the directly or flux coupled energy as well as the parametrically transferred energy, and thus the nature and size of the core is a factor even if there is little or no flux coupling.
  • V voltage induced in winding L inductance of winding i current in winding
  • the power transferred is a function of both the inductance of the winding times the change in the current in the winding with time, and the current in the winding times the change of inductance of the winding with respect to time.
  • the first term of the foregoing equation represents the flux coupling phenomena while the second term represents the parametric coupling phenomena. Rather than utilize one or the other of these terms, as is done, for example, in Sola transformers and in the aforementioned parametric device, applicants circuit simultaneously utilizes both terms of the equation; in the case of FIG. 2 by the use of two separate windings and in the case of FIG. 3 by the use of a single winding.
  • phase relationship of the output voltage to the input voltage of either circuit is a function of the amounts of in phase and out of phase voltages that are mixed and the output voltage is very closely regulated, and it appears that the parametric coupling phenomena controls the final output of the circuit.
  • the circuits can transfer many times as much power than could the parametric device standing alone, it appears that the greater portion of the power transfer is probably accomplished by other than parametric coupling.
  • the logical conclusion to be drawn from these factors is that the parametric circuit in some way compensates for variations in the voltage and power transferred to the tank circuit through direct or flux coupling.
  • the parametric circuit is in some way akin to a peak power regulator, that is, it adds to or subtracts from the voltage and power levels established by the flux coupled winding or by the direct coupling to maintain the output at a constant voltage. It would appear that the parametric circuit thus provides a reservoir from which additional power can be drawn when necessary or into which excess power can be dumped in order to maintain a regulated output voltage.
  • the current in the load winding on which the varying inductance in the load winding operates is itself dependent on the operation of the device, it might be somehow limited, thus limiting the possible power transfer of which the device is capable. For example, with a regulated output voltage, if the load requires greater power, a larger current would have to be drawn from the tank circuit. This might result in the current in the load winding being reduced to a value so low that the resonant circuit is unable to continue to oscillate.
  • the oscillations of the resonant circuit of the parametric device will not be damped and thus it can continue to function and regulate the output voltage even when large amounts of power are drawn by the load. It would also appear that the larger current would also be operated on by the changing inductance of the load winding so that greater power transfer could take place between the control winding and the load winding of the parametric device.
  • the circuit of FIG. 2 uses a separate winding to perform the flux coupling function.
  • control winding and the separate secondary winding could be replaced by an autotransformer or the like. If desired, the secondary winding could be coupled to the input through a completely separate transformer although this would reduce the savings of iron made possible by the present device.
  • the various modifications of the input and output circuits shown in the aforementioned US. application Ser. No. 589,780 could also be used in connection with the present invention.
  • An electrical system comprising:
  • an input circuit adapted to be connected to a source of AC. voltage
  • variable inductor comprising a magnetic core, a stator, a stator, a stator, a magnetor, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a stator, a
  • capacitor means connected to said load winding to form a resonant circuit
  • An electromagnetic power transfer system comprising an input, an output circuit including a resonant circuit, means parametrically coupling said input to said resonant circuit, and means directly electrically coupling said input to said resonant circuit, including means directly conductively connecting said input and output windings.
  • An electrical system comprising:
  • means for coupling said input winding means to said input circuit means directly coupling said input circuit to said resonant circuit, including means directly conductively connecting the input and output windings, for supplying energy to said resonant circuit;
  • a method of transferring electrical power from an input circuit to an output circuit comprising transferring substantial amounts of power from said input circuit to said output circuit by both parametric coupling and electrical coupling directly connecting said input circuit with said output circuit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)
  • Coils Of Transformers For General Uses (AREA)
US750914A 1968-08-07 1963-08-07 Parametric voltage regulator with high power transfer capacity Expired - Lifetime US3683269A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75091468A 1968-08-07 1968-08-07

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US3683269A true US3683269A (en) 1972-08-08

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US750914A Expired - Lifetime US3683269A (en) 1968-08-07 1963-08-07 Parametric voltage regulator with high power transfer capacity

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US (1) US3683269A (de)
BE (1) BE737215A (de)
CH (1) CH506168A (de)
DE (1) DE1939563A1 (de)
FR (1) FR2015229A7 (de)
NL (1) NL6912072A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988594A (en) * 1973-12-20 1976-10-26 Kevin William Low Electric fences
US4339792A (en) * 1979-04-12 1982-07-13 Masayuki Yasumura Voltage regulator using saturable transformer
US5323304A (en) * 1992-01-27 1994-06-21 Georator Corporation A.C. storage module for reducing harmonic distortion in an A.C. waveform
US5570006A (en) * 1992-01-27 1996-10-29 Power Distribution, Inc. A.C. storage module for reducing harmonic distortion in an A.C. waveform

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694177A (en) * 1951-03-16 1954-11-09 Joseph G Sola Transformer having constant and harmonic free output voltage
US2706271A (en) * 1951-10-31 1955-04-12 Raytheon Mfg Co Voltage regulators
US3112439A (en) * 1961-09-19 1963-11-26 Forbro Design Inc Flux oscillator transformer with variable shunt
US3286159A (en) * 1963-02-11 1966-11-15 North Electric Co Current supply apparatus employing electric waveform conversion
US3403323A (en) * 1965-05-14 1968-09-24 Wanlass Electric Company Electrical energy translating devices and regulators using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694177A (en) * 1951-03-16 1954-11-09 Joseph G Sola Transformer having constant and harmonic free output voltage
US2706271A (en) * 1951-10-31 1955-04-12 Raytheon Mfg Co Voltage regulators
US3112439A (en) * 1961-09-19 1963-11-26 Forbro Design Inc Flux oscillator transformer with variable shunt
US3286159A (en) * 1963-02-11 1966-11-15 North Electric Co Current supply apparatus employing electric waveform conversion
US3403323A (en) * 1965-05-14 1968-09-24 Wanlass Electric Company Electrical energy translating devices and regulators using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988594A (en) * 1973-12-20 1976-10-26 Kevin William Low Electric fences
US4339792A (en) * 1979-04-12 1982-07-13 Masayuki Yasumura Voltage regulator using saturable transformer
US5323304A (en) * 1992-01-27 1994-06-21 Georator Corporation A.C. storage module for reducing harmonic distortion in an A.C. waveform
US5570006A (en) * 1992-01-27 1996-10-29 Power Distribution, Inc. A.C. storage module for reducing harmonic distortion in an A.C. waveform

Also Published As

Publication number Publication date
NL6912072A (de) 1970-02-10
DE1939563A1 (de) 1970-02-12
BE737215A (de) 1970-01-16
FR2015229A7 (de) 1970-04-24
CH506168A (de) 1971-04-15

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