GB512350A - Improvements in means for controlling the excitation of dynamo electric machines - Google Patents

Improvements in means for controlling the excitation of dynamo electric machines

Info

Publication number
GB512350A
GB512350A GB1624238A GB1624238A GB512350A GB 512350 A GB512350 A GB 512350A GB 1624238 A GB1624238 A GB 1624238A GB 1624238 A GB1624238 A GB 1624238A GB 512350 A GB512350 A GB 512350A
Authority
GB
United Kingdom
Prior art keywords
exciter
winding
motor
shunts
armature
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
GB1624238A
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.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB1624238A priority Critical patent/GB512350A/en
Publication of GB512350A publication Critical patent/GB512350A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K23/00DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/40DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
    • H02K23/46DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits having stationary shunts, i.e. magnetic cross flux

Abstract

512,350. Dynamo-electric machines. ENGLISH ELECTRIC CO., Ltd., and CARNEGIE, H. S. May 31, 1938, No. 16242. [Class 35] The exciter of a dynamo-electric machine has a field winding on a main pole carrying the load current or a shunted part of the load current and a magnetic shunt in good magnetic contact with the mair pole for diverting fron the exciter armature the flux produced by the field winding, this shun being adapted to be come saturated at a predetermined value of the current in the field winding whereby the fraction of the total flux produced by this winding passing through the armature is greater when the circuit is above this value than when it is below. The shunt 7 may connect adjacent pole-shoes as shown or may extend between the pole-shoes and the yoke. The Figure shows the invention applied to the compounding of a motor 1 supplied from a Ward-Leonard generator 2. The motor field winding 3 is supplied through a rheostat 10 from a constant voltage source 4 in series with an exciter 5, the field winding 6 of which is connected across an inductive shunt 11 in the armature circuit of the motor. Owing to the presence of the shunts 7, the compounding effect of the exciter is substantially zero until at a predetermined value of current in the winding 6, the shunts become saturated. The exciter may be driven by the motor 1 in which case the compounding effect varies with speed and also reversal of the armature connections is not necessary when the main motor is reversed. Should the motor regenerate, the exciter voltage will reverse so that the exciter 5 will act as a decompounding machine. The point of saturation of the shunts may be varied by adjusting the cross-sectional area or control coils on the shunts or on the poles may be fed through a rheostat from a source of constant voltage or from the generator 2. A further compounding exciter in the circuit of the motor field winding 3 may be controlled by a regulator acting in response to the current in the main motor circuit or to the E.M.F. of the exciter. The shunt may be arranged to deflect a part only of the flux to obtain some compounding over the whole range of operation. The exciter poles may extend beyond the shunts and the extensions provided with main coils for producing a constant flux through the armature. The appli- .cation of the invention to a machine coupled to a coiling or uncoiling reel for strip material is described. Specification 472,472 is referred to in the Provisional Specification.
GB1624238A 1938-05-31 1938-05-31 Improvements in means for controlling the excitation of dynamo electric machines Expired GB512350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1624238A GB512350A (en) 1938-05-31 1938-05-31 Improvements in means for controlling the excitation of dynamo electric machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1624238A GB512350A (en) 1938-05-31 1938-05-31 Improvements in means for controlling the excitation of dynamo electric machines

Publications (1)

Publication Number Publication Date
GB512350A true GB512350A (en) 1939-09-01

Family

ID=10073758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1624238A Expired GB512350A (en) 1938-05-31 1938-05-31 Improvements in means for controlling the excitation of dynamo electric machines

Country Status (1)

Country Link
GB (1) GB512350A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475140A (en) * 1944-10-30 1949-07-05 Harnischfeger Corp Regulating generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475140A (en) * 1944-10-30 1949-07-05 Harnischfeger Corp Regulating generator

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