US2220539A - Nonresonating transformer - Google Patents

Nonresonating transformer Download PDF

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Publication number
US2220539A
US2220539A US272678A US27267839A US2220539A US 2220539 A US2220539 A US 2220539A US 272678 A US272678 A US 272678A US 27267839 A US27267839 A US 27267839A US 2220539 A US2220539 A US 2220539A
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transformer
coils
nonresonating
capacity
winding
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US272678A
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Panov Alexis
Lipkovski Moses
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/343—Preventing or reducing surge voltages; oscillations

Definitions

  • This invention relates to improvements in nonresonating transformers in which the phenomenon of resonance is obviated by means of superimposing on the electrostatic field of a trans- 5 former winding the electrostatic field of an independent capacity potential divider connected to the beginning of the transformer winding.
  • such a superimposition may be carried out in several different 10 ways.
  • l des- 15 ignates sections of the transformer winding
  • 2 is a capacity potential divider composed of a series of condensers
  • 3 are potential distributing plates in the form of insulated flat metal washers connected to respective points of the potentiometer and arranged between the transformer coils.
  • the plates of the capacity potentiometer 2 have the form of insulated flat discs arranged between the coils l of the transformer.
  • the capacity potentiometer comprises condensers 2 having the form of cylinders encircling the coil 1 and are capacitatively coupled one to the other.
  • FIG. 5, 6 and 7 shows further modi- 30 fications of Figs. 1, 2 and 3 respectively said modifications consisting in that for the purpose of eliminating the electrostatic flux passing from the current carrying system directly to earth, and, consequently eliminating the increase of potential difference between coils and the change of voltage distribution inside the coils themselves, due to this capacity earth current, metal guard rings 4 are used to screen the coils I radially, each guard ring being connected to respective 40 points on the electrostatic potentiometer.
  • the invention has many advantages over the well known transformers having no such capacitative protection. For instance in the transformer according to the invention there is no conductive connection between the protective de- 5 vice and the winding except at one end, so that the puncture of one condenser does not cause a short circuit in the coil.
  • transformers having delta connected windings, and three-phase transformers having the protective condensers arranged in the channels between the coils.
  • a nonresonating transformer comprising, coils connected in a series circuit relation, a capacity potential divider capacitively associated with said coils and conductively connected to one end of the series of coils, said capacity potential divider comprising cylindrical condenser plates encircling the coils and capacitively associated with each other, insulated discs arranged between the coils conductively connected to said condenser plates, rings arranged to screen the coils with respect to ground, and said rings being connected to said condenser plates.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Description

NOV. 5
A. PANOV EFAL 7 2,220,539
N ONRESONAT ING TRANSFORMER Filed May 9, 1939 Patented Nov. 5, 1940 UNITED STATES PATENT OFFICE NONRESONATING TRANSFORIVIER Alexis Panov and Moses Lipkovski, Moscow, Union of Soviet Socialist Republics 1 Claim.
This invention relates to improvements in nonresonating transformers in which the phenomenon of resonance is obviated by means of superimposing on the electrostatic field of a trans- 5 former winding the electrostatic field of an independent capacity potential divider connected to the beginning of the transformer winding.
According to this invention such a superimposition may be carried out in several different 10 ways.
In the appended drawing Figs. 1, 2, 3, 4, 5, 6 and 7 show diagrammatically different modes of carrying out this invention.
In the embodiment according to Fig. 1, l des- 15 ignates sections of the transformer winding, 2 is a capacity potential divider composed of a series of condensers, 3 are potential distributing plates in the form of insulated flat metal washers connected to respective points of the potentiometer and arranged between the transformer coils.
In the embodiment according to- Fig. 2 the plates of the capacity potentiometer 2 have the form of insulated flat discs arranged between the coils l of the transformer.
25 According to Figs. 3 and 4 the capacity potentiometer comprises condensers 2 having the form of cylinders encircling the coil 1 and are capacitatively coupled one to the other.
Each of Figs. 5, 6 and 7 shows further modi- 30 fications of Figs. 1, 2 and 3 respectively said modifications consisting in that for the purpose of eliminating the electrostatic flux passing from the current carrying system directly to earth, and, consequently eliminating the increase of potential difference between coils and the change of voltage distribution inside the coils themselves, due to this capacity earth current, metal guard rings 4 are used to screen the coils I radially, each guard ring being connected to respective 40 points on the electrostatic potentiometer.
The invention has many advantages over the well known transformers having no such capacitative protection. For instance in the transformer according to the invention there is no conductive connection between the protective de- 5 vice and the winding except at one end, so that the puncture of one condenser does not cause a short circuit in the coil.
Inside separate coils the capacity distribution of the voltage is improved. Thus, local distor- 10 tions in voltage distribution are diminished. The invention renders it practically possible to double the protection of the winding.
All these advantages of the invention permit increasing the number of objects which can be made nonresonating.
As such may be mentioned transformers having delta connected windings, and three-phase transformers having the protective condensers arranged in the channels between the coils.
In the last case the proposed arrangement leads to a simple and compact structure, all transformer windings being open for protection, and the winding being easily accessible.
We claim:
A nonresonating transformer comprising, coils connected in a series circuit relation, a capacity potential divider capacitively associated with said coils and conductively connected to one end of the series of coils, said capacity potential divider comprising cylindrical condenser plates encircling the coils and capacitively associated with each other, insulated discs arranged between the coils conductively connected to said condenser plates, rings arranged to screen the coils with respect to ground, and said rings being connected to said condenser plates.
ALEXIS PANOV. MOSES LIPKOVSKI. m
US272678A 1938-07-29 1939-05-09 Nonresonating transformer Expired - Lifetime US2220539A (en)

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SU2220539X 1938-07-29

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592817A (en) * 1949-01-15 1952-04-15 Primeweld Corp Electric coil
US2615091A (en) * 1947-11-14 1952-10-21 Gen Electric Screened high-frequency circuit element
US2772403A (en) * 1952-03-28 1956-11-27 Bbc Brown Boveri & Cie High voltage transformer
US3376530A (en) * 1966-04-27 1968-04-02 Westinghouse Electric Corp Axially spaced transformer pancake coils having static plate
US3466584A (en) * 1966-06-22 1969-09-09 Hitachi Ltd Winding for a stationary induction electrical apparatus
US4318066A (en) * 1980-05-19 1982-03-02 General Electric Company Externally shielded disk windings for transformers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615091A (en) * 1947-11-14 1952-10-21 Gen Electric Screened high-frequency circuit element
US2592817A (en) * 1949-01-15 1952-04-15 Primeweld Corp Electric coil
US2772403A (en) * 1952-03-28 1956-11-27 Bbc Brown Boveri & Cie High voltage transformer
US3376530A (en) * 1966-04-27 1968-04-02 Westinghouse Electric Corp Axially spaced transformer pancake coils having static plate
US3466584A (en) * 1966-06-22 1969-09-09 Hitachi Ltd Winding for a stationary induction electrical apparatus
US4318066A (en) * 1980-05-19 1982-03-02 General Electric Company Externally shielded disk windings for transformers

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