GB549318A - Improvements in current limiting arrangements for shunt motors - Google Patents

Improvements in current limiting arrangements for shunt motors

Info

Publication number
GB549318A
GB549318A GB918241A GB918241A GB549318A GB 549318 A GB549318 A GB 549318A GB 918241 A GB918241 A GB 918241A GB 918241 A GB918241 A GB 918241A GB 549318 A GB549318 A GB 549318A
Authority
GB
United Kingdom
Prior art keywords
inductance
field
auxiliary
current
saturate
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
GB918241A
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.)
ALLMAENNA SVENSKA ELEK SKA AKI
Original Assignee
ALLMAENNA SVENSKA ELEK SKA AKI
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 ALLMAENNA SVENSKA ELEK SKA AKI filed Critical ALLMAENNA SVENSKA ELEK SKA AKI
Priority to GB918241A priority Critical patent/GB549318A/en
Publication of GB549318A publication Critical patent/GB549318A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors

Landscapes

  • Control Of Direct Current Motors (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

549,318. Control of D.C. motors. GORDON, H. H. (Allmanna Svenska Elektriska Aktiebolaget). July 21, 1941, No. 9182. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 23, 1942.] [Class 38 (iii)] Varying field. To limit the armature current of a D.C. motor 1 an inductance 12 and auxiliary A.C. source are connected in series with a shunt field winding 2 of the motor by means of a rectifier bridge 13 and the armature current is caused directly or indirectly to saturate the inductance whereby the field is strengthened. Saturable inductances 6, 12 having a self exciting winding -s 4, 10 may be arranged in cascade, auxiliary windings 5, 11 on each opposing the two saturating windings to determine the characteristic of operation. In a modification, Fig. 2, the rectified potential across an inductance 26 fed with substantially constant current through a larger inductance 28 is used to saturate the field circuit inductance 12. To avoid passing the normal field current through the self exciting winding 10 of the inductance 12 an auxiliary rectifier with or without a transformer may be used.
GB918241A 1941-07-21 1941-07-21 Improvements in current limiting arrangements for shunt motors Expired GB549318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB918241A GB549318A (en) 1941-07-21 1941-07-21 Improvements in current limiting arrangements for shunt motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB918241A GB549318A (en) 1941-07-21 1941-07-21 Improvements in current limiting arrangements for shunt motors

Publications (1)

Publication Number Publication Date
GB549318A true GB549318A (en) 1942-11-16

Family

ID=9866973

Family Applications (1)

Application Number Title Priority Date Filing Date
GB918241A Expired GB549318A (en) 1941-07-21 1941-07-21 Improvements in current limiting arrangements for shunt motors

Country Status (1)

Country Link
GB (1) GB549318A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709234A (en) * 1951-11-21 1955-05-24 W L Maxson Corp Electric motor speed control system
US2783427A (en) * 1953-07-10 1957-02-26 W L Maxson Corp Motor control systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709234A (en) * 1951-11-21 1955-05-24 W L Maxson Corp Electric motor speed control system
US2783427A (en) * 1953-07-10 1957-02-26 W L Maxson Corp Motor control systems

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