US3408554A - Combined magnetic regulator and transformer - Google Patents

Combined magnetic regulator and transformer Download PDF

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Publication number
US3408554A
US3408554A US530309A US53030966A US3408554A US 3408554 A US3408554 A US 3408554A US 530309 A US530309 A US 530309A US 53030966 A US53030966 A US 53030966A US 3408554 A US3408554 A US 3408554A
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US
United States
Prior art keywords
windings
coupled
transformer
output
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US530309A
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English (en)
Inventor
Joseph A Fingerett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Micronas GmbH
ITT Inc
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Deutsche ITT Industries GmbH
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Filing date
Publication date
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to US530309A priority Critical patent/US3408554A/en
Priority to DE19671638318 priority patent/DE1638318A1/de
Priority to GB8968/67A priority patent/GB1178003A/en
Priority to NL6703128A priority patent/NL6703128A/xx
Priority to BE694734D priority patent/BE694734A/xx
Application granted granted Critical
Publication of US3408554A publication Critical patent/US3408554A/en
Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/12—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC
    • G05F1/32—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices
    • G05F1/34—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/38—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/012—Automatic controllers electric details of the transmission means
    • G05B11/016—Automatic controllers electric details of the transmission means using inductance means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/12—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC
    • G05F1/32—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices
    • G05F1/33—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices with plural windings through which current to be controlled is conducted

Definitions

  • ABSTRACT OF THE DISCLOSURE A magnetic regulator compactly combined with a transformer by winding primary and secondary transformer and maintain the voltage across said load substantially constant regardless of variations in the AC. input voltage or load impedance.
  • This invention relates to magnetic regulators and more particularly to a combined magnetic regulator and transformer.
  • a feature of this invention is that by winding a common transformer and magnetic regulator.
  • FIGURE 1 is a schematic illustration of a magnetic regulator and transformer according to this invention
  • FIGURE 2 is a schematic illustration of the waveforms generated at various points in the circuit of FIGURE 1;
  • FIGURE 3 is a schematic illustration of a feedback-type regulated voltage supply according to this invention.
  • FIGURE 4 is a representation of the physical structure of the transformer and magnetic regulator according to this invention.
  • FIGURE 5 is a schematic diagram of a 3-phase circuit according to the principles of this invention.
  • FIGURE 6 is an illustration of the Waveforms generated at various points in the circuit of FIGURE 5.
  • i United States Patent 0 is the same as the alternating current supply multipliet by either the step-up or step-down ratio between winding: Essentially, the coaction of windings W1 anc of winding W2 is coupled to the load R via diode CR2 and a full Wave rectifier comprising diodes CR3 and CR4. Connected between the full wave rectifier and the load is to the output signal produced across winding W2.
  • Windings W4A and W4B coupled with the Windings on the primary side of said transformers operate as a standard magnetic controller, the operation of which is widely known in the art and is described in numerous textbooks and articles (see for example, Magnetic-Amplifier Circuits by Geyger, second edition, pages 264-268). Therefore, a description thereof will not be undertaken here.
  • FIGURES 2A through 2H illustrate the waveforms appearing at various points in the magnetic regulator section of the circuit of FIGURE 1 which comprises windings W1, W3A, W3B, W4A and W4B.
  • the output of the alternating current e is shown in FIGURE 2A as a square wave in order to simplify an analysis of the circuit. It is apparent that many other alternating current signals may be utilized instead of a square W4B, respectively.
  • FIG- URE 2 When E is again zero, the output to load R is merely the full wave rectified alternating signal (see magnitude of DC.
  • control signal E As shown in FIG- URE 2 when the control signal E is decreased (see signal 23, FIGURE 2B) pulses of shorter duration is full wave rectified by FIGURE 3 illustrates the basic circuit of FIGURE 1 ut further including means for developing an error voltge E proportional to the deviation of the output voltage rom a desired value.
  • the error voltage E is obtained by means of the differential coupling of R1, R2, R3 and refernce diode CR7.
  • the junction between resistor R3 and refrence diode CR7 is positive with respect to the junction )etween resistors R1 and R2.
  • the D.C. voltage E obtained rom this differential connection is applied to windings WSA and W3B in the same manner as was the control signal E in FIGURE 1.
  • the operation of this circuit is identical to the operation of the circuit of FIGURE 1. If the voltage across resistor R increases, the error voltage E will decrease, thereby causing the duration of the pulses added to the output of the full wave rectifier to decrease. This decreases the average voltage supplied to the load.
  • the circuit of FIGURE 3 operates as a voltage regulated supply.
  • the circuit of FIGURE 3 utilizes a bridge-type full wave rectifier comprising diodes CR3- CR6 instead of the two diode-type full wave rectifier shown in FIGURE 1. This substitution has no effect on the operation of the circuit and is merely shown by way of example.
  • FIGURE 4 illustrates a physical embodiment of the transformer and regulator according to this invention. It is seen that windings W1 and W2 are wound in common on cores 2 and 3 to provide the aforementioned advantages.
  • the novel part of this invention lies in the addition of winding W2 to the previously known magnetic regulators and in the manner of placing windings W1 and W2 in common onto two transformer cores. In this manner the amount of iron core required for a given power output is substantially reduced over the prior art circuits which utilize separate regulators and transformers.
  • FIGURE there is shown a schematic diagram of a 3-phase circuit according to this invention.
  • a 3-phase alternating current source Applied to the primary windings P through P is a 3-phase alternating current source.
  • primary control windings C through C are also wound on the cores.
  • the secondary windings S through S are coupled to load R via diodes D through D
  • Secondary windings S through S are also coupled to load R via diodes D5 through D such that the output from windings 8 -8 and from S S are additive at load R10. Note that the windings having the same subscripts are wound on the same cores.
  • This circuit operates essentially in the same manner as three single phase structures (as shown in FIGURE 1 for example) coupled together and operating into a common load.
  • windings S '-S supply a signal proportional to the alternating input signal to the load-Therefore, the output to the common load R comprises the voltage pulses developed by the regulator portion of the circuit (windings 8 -8 superimposed on the full wave rectified version of the input signal which is supplied by windings S -S
  • windings P and P S and S S and S and C and C are analogous to the windings W1, W4A and W4B, W2 and W3A and W3B, respectively, as shown in the circuit of FIGURE 1.
  • the alternating current source is a three phase sinusoidal waveform as shown in FIG- URE 6A instead of the square wave input shown in FIG- URE 2A. It is apparent that any three phase alternating current input signal may be used and that the sinusoidal waveform is shown merely by way of example. A brief description of the circuit shown in FIGURE 5 taken in conjunction with the waveforms shown in FIGURE 6 appears below.
  • windings S -S are not connected in the cirthe fact that P and P 4 cuit and the only output signal to the load R is supplied by windings S -S via diodes Dl-D4.
  • Equations 14, 15, and 16 are imposed by are in series across E etc. During the portion of each cycle that both core segments are unsaturated, a second condition can be imposed (see FIGURE 5).
  • Equation 17 The time that Equation 17 is effective is from the zero crossing of the appropriate phase of the supply voltage, until saturation of one flux path of the pair. During this time, the control windings present a relatively high input impedance, and the current flow is related to the differential impedance of two unsaturated cores operating at different voltage levels.
  • FIGURE 6 the three phase alternating current supply potential is shown, with typical waveforms for E and E E and E E and E will be pairwise identical, except for the relative phase displacement of the corresponding primary sources.
  • the output resulting from the system is shown, for saturation of the first core in each pair at It is possible to provide for saturation at any phase angle between 90 and the corresponding output level going from maximum to minimum. The minimum output obtainable from this circuit is zero.
  • FIGURE 5 will now be discussed assuming that secondary windings S '-S are connected in the circuit as shown. These secondaries are series connected as are the primaries, so that a conventional three phase rectified output is obtained therefrom b means of diodes DS-D10. Since windings S and S are coupled together in the same relationship as are windings P and P the voltage across this series pair is related to the primary voltage through the turns ratio used. The differential voltage will not appear across the series pair.
  • the output ripple frequency from the three phase controller is at six times the supply frequency, even though only three rectifiers are used.
  • a sensing circuit coupled from the load R to control voltage E may be added to this circuit in the same manner as in lated 3-phase voltage supply. It is not shown in the drawings in conjunction with the 3-phase circuit for the sake of clarity.
  • a combined magnetic regulator and transformer comprising:
  • a first transformer core having first and second primary windings and first and second secondary windings
  • core having third and fourth primary windings and third and fourth secondary windings
  • said first and third primary windings being coupled in series aiding, said first and third secondary windings being coupled in series aiding, said second and fourth primary windings being coupled in series opposing, and said second and fourth secondary windings being coupled in series opposing;
  • a combined magnetic regulator and transformer according to claim 1 wherein said means for applying a control signal comprises:
  • said means for developing an error voltage comprises a differential voltage detector coupled across said output means.
  • said differential detector comprises:
  • first and second resistors coupled in series and across said output means
  • a combined magnetic regulator and transformer comprising:
  • a first transformer core having first primary windings and first secondary windings thereon;
  • a second transformer core having second primary windings and second secondary windings thereon;
  • a combined magnetic regulator and transformer comprising:
  • a first transformer core having first and second primary windings and first and second secondary windings thereon;
  • a second transformer core having third and fourth pri mary windings and third and fourth secondary windings thereon;
  • a low pass filter coupled to said diode
  • a combined 3-phase magnetic reguilator and transformer comprising:
  • a first transformer core having first and second primary windings and first and second secondary windings
  • a second transformer core having third and fourth primary windings and third and fourth secondary windings
  • a third transformer core having fifth and sixth primary windings and fifth and sixth secondary windings
  • a fourth transformer core having seventh and eighth primary windings and seventh and eighth secondary windings
  • the device of claim 10 further comprising a plurality of diodes
  • each endpoint of the legs of said Y configurations and each neutral point of said Y configurations being coupled to said output means rality of diodes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Dc-Dc Converters (AREA)
  • Rectifiers (AREA)
US530309A 1966-02-28 1966-02-28 Combined magnetic regulator and transformer Expired - Lifetime US3408554A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US530309A US3408554A (en) 1966-02-28 1966-02-28 Combined magnetic regulator and transformer
DE19671638318 DE1638318A1 (de) 1966-02-28 1967-02-17 Magnetregler
GB8968/67A GB1178003A (en) 1966-02-28 1967-02-24 Improvements in or relating to Magnetic Regulators
NL6703128A NL6703128A (en)van) 1966-02-28 1967-02-27
BE694734D BE694734A (en)van) 1966-02-28 1967-02-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US530309A US3408554A (en) 1966-02-28 1966-02-28 Combined magnetic regulator and transformer

Publications (1)

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US3408554A true US3408554A (en) 1968-10-29

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US (1) US3408554A (en)van)
BE (1) BE694734A (en)van)
DE (1) DE1638318A1 (en)van)
GB (1) GB1178003A (en)van)
NL (1) NL6703128A (en)van)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302805A (en) * 1977-12-27 1981-11-24 Kyber Engineering, Inc. Power supply utilizing a high frequency magnetic amplifier
WO2010013059A1 (en) 2008-07-31 2010-02-04 Surgical Innovations Limited Endoscopic surgical instrument
US20110184232A1 (en) * 2008-07-31 2011-07-28 Vhairi Maxwell Endoscopic surgical instrument

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167581B (en) * 1984-11-01 1987-12-09 George William Spall Transformer control circuit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1997657A (en) * 1932-07-16 1935-04-16 Westinghouse Electric & Mfg Co Regulating system
US2777073A (en) * 1954-05-24 1957-01-08 Librascope Inc Magnetic amplifier
US2777986A (en) * 1950-06-01 1957-01-15 Bendix Aviat Corp Control apparatus for saturable core device
US2885627A (en) * 1954-06-10 1959-05-05 Varo Mfg Co Inc Voltage regulating device
US3112440A (en) * 1962-01-08 1963-11-26 Electric Auto Lite Co Ferroresonant voltage stabilizer
US3315151A (en) * 1961-10-24 1967-04-18 Stabilac Pty Ltd Regulated transformer power supplies

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1997657A (en) * 1932-07-16 1935-04-16 Westinghouse Electric & Mfg Co Regulating system
US2777986A (en) * 1950-06-01 1957-01-15 Bendix Aviat Corp Control apparatus for saturable core device
US2777073A (en) * 1954-05-24 1957-01-08 Librascope Inc Magnetic amplifier
US2885627A (en) * 1954-06-10 1959-05-05 Varo Mfg Co Inc Voltage regulating device
US3315151A (en) * 1961-10-24 1967-04-18 Stabilac Pty Ltd Regulated transformer power supplies
US3112440A (en) * 1962-01-08 1963-11-26 Electric Auto Lite Co Ferroresonant voltage stabilizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302805A (en) * 1977-12-27 1981-11-24 Kyber Engineering, Inc. Power supply utilizing a high frequency magnetic amplifier
WO2010013059A1 (en) 2008-07-31 2010-02-04 Surgical Innovations Limited Endoscopic surgical instrument
US20110184232A1 (en) * 2008-07-31 2011-07-28 Vhairi Maxwell Endoscopic surgical instrument

Also Published As

Publication number Publication date
BE694734A (en)van) 1967-08-28
GB1178003A (en) 1970-01-14
DE1638318A1 (de) 1970-06-11
NL6703128A (en)van) 1967-08-29

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Owner name: ITT CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606

Effective date: 19831122