GB698065A - Improvements in protective arrangements for direct current dynamo electric machines - Google Patents

Improvements in protective arrangements for direct current dynamo electric machines

Info

Publication number
GB698065A
GB698065A GB26953/51A GB2695351A GB698065A GB 698065 A GB698065 A GB 698065A GB 26953/51 A GB26953/51 A GB 26953/51A GB 2695351 A GB2695351 A GB 2695351A GB 698065 A GB698065 A GB 698065A
Authority
GB
United Kingdom
Prior art keywords
winding
motor
field
excitation
current
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
GB26953/51A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Publication of GB698065A publication Critical patent/GB698065A/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
    • H02H7/0833—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 electric motors with control arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/36—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using armature-reaction-excited machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

698,065. Exciting dynamo-electric machines. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Nov. 16, 1951 [Nov. 30, 1950], No. 26953/51. Class 35. [Also in Group XXXVII] Relates to arrangements for protecting direct. current dynamo-electric machines against the production of excessive armature currents as a result of rapid change of excitation by regulating means for the machines. As shown, a Ward-Leonard motor 2 has its field winding 16 supplied from a constant source 26 through a bucking cross-flux exciter 17. The control field winding 18 of the exciter is regulated by rheostat 22 and co-operates with a winding 19 which just counter-balances the sub-neutralization of the exciter when the necessary excitation current is flowing in the winding 16. In order to limit the speed of response of the machine 17 a transformer winding 28 is connected to winding 27 which opposes the change of control ampere-turns. A magnetic amplifier has coils 30, 31 connected to a centre-tapped transformer secondary winding and to the terminals of a resistor 25 which is in the circuit of the control winding 18. Rectifiers 32, 33 are arranged so that the output of the magnetic amplifier opposes the source 26. The amplifier has saturation winding 34 supplied through rectifier 36 in accordance with the motor armature current, and an opposing saturation winding 35 is energized in proportion to the field current of the motor. When rheostat 22 is adjusted to reduce the field excitation of the motor and an excessive armature current is caused thereby, the winding 34 overcomes the winding 35 and the magnetic amplifier produces a voltage across resistor 25 which reduces the extent of field-weakening. The value of armature current at which this operation takes place increases with an increasing prevailing excitation of the motor since the energization of the winding 35 increases with the motor field excitation. Specification 698,064 is referred to.
GB26953/51A 1950-11-30 1951-11-16 Improvements in protective arrangements for direct current dynamo electric machines Expired GB698065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR698065X 1950-11-30

Publications (1)

Publication Number Publication Date
GB698065A true GB698065A (en) 1953-10-07

Family

ID=9047499

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26953/51A Expired GB698065A (en) 1950-11-30 1951-11-16 Improvements in protective arrangements for direct current dynamo electric machines

Country Status (1)

Country Link
GB (1) GB698065A (en)

Similar Documents

Publication Publication Date Title
GB652732A (en) Improvements relating to regulators for dynamo electric machines
GB698065A (en) Improvements in protective arrangements for direct current dynamo electric machines
US3201626A (en) Differential bias auxiliary comutating field
US2184371A (en) Regulating system
US2549250A (en) Voltage regulator with phase splitting circuit controlled by inductive damping means
GB571851A (en) Means for regulating a machine voltage
GB907086A (en) Automatic voltage control apparatus for dynamoelectric generators
GB698064A (en) Improvements in the high-speed control of electrical machines
GB653444A (en) Improvements relating to control systems for direct current generator-motor sets
GB1069419A (en) Load balancing circuit arrangement for electrical machines
GB512350A (en) Improvements in means for controlling the excitation of dynamo electric machines
SU113162A1 (en) Electric motor direct current
GB739000A (en) Improvements relating to dynamo electric machines
GB739570A (en) Means for voltage regulation by aid of an exciter
GB628829A (en) Improvements in and relating to control circuit arrangements in electric motor equipments
GB670856A (en) Improvements in and relating to the braking of induction motors
GB656719A (en) Improvements relating to systems for controlling the excitation of polyphase machines
GB745767A (en) Motor generator power system
GB677247A (en) Improvements in or relating to direct current electric supply systems
GB669854A (en) Improvements relating to control systems for dynamo electric machines
GB450060A (en) Improvements in or relating to electrical supply equipments
GB304712A (en) Improvements in speed regulating systems for electric motors
GB681162A (en) Improvements relating to control systems for dynamo electric machines
GB718695A (en) An improved system or arrangement for the control of dynamo-electric machines
GB561901A (en) Improvements in the regulation of universally operable dynamo electric machines