GB634426A - Improvements in or relating to variable-current electrical transformers - Google Patents

Improvements in or relating to variable-current electrical transformers

Info

Publication number
GB634426A
GB634426A GB34582/47A GB3458247A GB634426A GB 634426 A GB634426 A GB 634426A GB 34582/47 A GB34582/47 A GB 34582/47A GB 3458247 A GB3458247 A GB 3458247A GB 634426 A GB634426 A GB 634426A
Authority
GB
United Kingdom
Prior art keywords
shunt
olthof
portions
current
limb
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
Application number
GB34582/47A
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.)
TONNIS OLTHOF
Original Assignee
TONNIS OLTHOF
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TONNIS OLTHOF filed Critical TONNIS OLTHOF
Publication of GB634426A publication Critical patent/GB634426A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/085—Welding transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit

Abstract

634,426. Transformers. OLTHOF, M., and OLTHOF, T. (trading as TRANSFORMATORENFABRIEK FIRMA GEB. OLTHOF). Dec. 30, 1947, No. 34582. Convention date, Dec. 19, 1941. [Class 38 (ii)] In a welding transformer adapted to regulate the current thereof, a secondary winding is in three portions 2, 3, 4, the portion 3 being on a first limb of a core also carrying a primary winding 1, the portion 4 in series. with 3 and on an adjustable magmetic shunt 5, and the portion 2 in parallel with the portion 3, 4 and on a second limb of the core. The regulation of the secondary circuit current depends upon the position of the shunt 5 which may be rotated about a vertical axis. When the shunt 5 is in a closed position with the M.M.F.'s of the portions 3, 4 additive, the effect of the shunt 5 is greater and the portion 2 carries the greater part of the load current. When the shunt 5 is turned. through 180 degrees the M.M.F.'s of the portions 3, 4 are opposed and the effect of the shunt 5 disappears. The range of the current adjustment is increased and the drooping characteristic desirable for welding work is maintained, while the no-load voltage does not change.
GB34582/47A 1941-12-19 1947-12-30 Improvements in or relating to variable-current electrical transformers Expired GB634426A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL634426X 1941-12-19

Publications (1)

Publication Number Publication Date
GB634426A true GB634426A (en) 1950-03-22

Family

ID=19788841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34582/47A Expired GB634426A (en) 1941-12-19 1947-12-30 Improvements in or relating to variable-current electrical transformers

Country Status (3)

Country Link
US (1) US2513512A (en)
GB (1) GB634426A (en)
NL (1) NL69203C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335379A (en) * 1965-07-20 1967-08-08 Carl G Howard Adjustable voltage transformer

Families Citing this family (7)

* 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
US2789245A (en) * 1953-09-30 1957-04-16 Strong Electric Corp Arc lamp
TWI278875B (en) * 2004-04-30 2007-04-11 Hon Hai Prec Ind Co Ltd DC transformer with output inductor integrated on the magnetic core thereof and a DC/DC converter employing the same
US20080048818A1 (en) * 2006-08-25 2008-02-28 Hong Mao Transformers with improved voltage-step-down ratios and DC-to-DC power converters employing same
KR101004823B1 (en) * 2007-12-27 2010-12-28 삼성전기주식회사 Transformer improved leakage inductance
DE102008049432B4 (en) * 2008-09-25 2018-02-08 Siemens Aktiengesellschaft Circuit breaker and current transformer for a circuit breaker
CN208622565U (en) * 2018-07-18 2019-03-19 台达电子工业股份有限公司 Magnetic element module

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831886A (en) * 1929-11-11 1931-11-17 Julian J Ross Transformer
US2187523A (en) * 1936-05-13 1940-01-16 Union Switch & Signal Co Electrical regulating apparatus
US2364881A (en) * 1942-09-10 1944-12-12 Air Reduction Welding transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335379A (en) * 1965-07-20 1967-08-08 Carl G Howard Adjustable voltage transformer

Also Published As

Publication number Publication date
US2513512A (en) 1950-07-04
NL69203C (en)

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