GB349930A - Improvements in relation to variable electric drives - Google Patents

Improvements in relation to variable electric drives

Info

Publication number
GB349930A
GB349930A GB619530A GB619530A GB349930A GB 349930 A GB349930 A GB 349930A GB 619530 A GB619530 A GB 619530A GB 619530 A GB619530 A GB 619530A GB 349930 A GB349930 A GB 349930A
Authority
GB
United Kingdom
Prior art keywords
brushes
commutator
motor
armature
motors
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
GB619530A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB619530A priority Critical patent/GB349930A/en
Publication of GB349930A publication Critical patent/GB349930A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/34—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using Ward-Leonard arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

349,930. Dynamo-electric machines. DRYSDALE, C. V., Admiralty, Whitehall, London. Feb. 25, 1930, No. 6195. [Class 35.] Brush-holders; motors, controlling; rotary transformers.-The armature of a separately-excited motor 2 is supplied from a set of brushes 9 .. 12 on the commutator of a rotary transformer 1, so that by moving these brushes from their normal position midway between the ordinary fixed brushes 5 .. 8 in either direction, the voltage applied to the motor armature is varied in magnitude and direction to give a variable-speed drive. The brushes 9 .. 12 are moved either by hand or power, and sparking is prevented by employing a commutator of large diameter, and large number of segments, extending the commutator axially, and employing long lines of narrow brushes, making the field as strong as possible, and using a small number of armature turns. A cam or the like is provided for lifting and short-circuiting the movable brushes in their normal position, so that the motor may be brought quickly to rest. In addition, an electromagnetic brake is provided to become effective when the current taken by the motor is below a certain value. A mechanically-driven generator may be used instead of the rotary transformer, and the invention is stated to be applicable to seriesparallel combinations of motors, and to alternating- current commutator machines.
GB619530A 1930-02-25 1930-02-25 Improvements in relation to variable electric drives Expired GB349930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB619530A GB349930A (en) 1930-02-25 1930-02-25 Improvements in relation to variable electric drives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB619530A GB349930A (en) 1930-02-25 1930-02-25 Improvements in relation to variable electric drives

Publications (1)

Publication Number Publication Date
GB349930A true GB349930A (en) 1931-05-26

Family

ID=9810137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB619530A Expired GB349930A (en) 1930-02-25 1930-02-25 Improvements in relation to variable electric drives

Country Status (1)

Country Link
GB (1) GB349930A (en)

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