GB191424837A - Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working. - Google Patents

Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working.

Info

Publication number
GB191424837A
GB191424837A GB191424837DA GB191424837A GB 191424837 A GB191424837 A GB 191424837A GB 191424837D A GB191424837D A GB 191424837DA GB 191424837 A GB191424837 A GB 191424837A
Authority
GB
United Kingdom
Prior art keywords
switch
slip
rings
current
coil
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
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.)
SANDYCROFT Ltd
Original Assignee
SANDYCROFT 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 SANDYCROFT Ltd filed Critical SANDYCROFT Ltd
Application granted granted Critical
Publication of GB191424837A publication Critical patent/GB191424837A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/26—Asynchronous induction motors having rotors or stators designed to permit synchronous operation

Abstract

24,837. Hunt, L. J., and Sandycroft, Ltd. Dec. 31. Alternating - current induction machines; motors, controlling.-In an alternating-current dynamo-electric machine having windings on the rotor adapted to operate in cascade and a winding on the stator to which direct current is supplied at cascade speed, as described in Specification 9261/13, the slip-rings 11, 16 connected to opposite terminals in the rotor winding are connected in pairs to variable resistances 19 adapted to be varied simultaneously, and a switch 3 is provided for short-circuiting one set of terminals, leaving the other set connected in star through the resistances 19, which can be gradually increased until the slip-rings connected thereto are open-circuited. The switch 3 may be operated automatically when the proper speed is reached by a tachometer, a voltmeter connected across the slip rings, or a frequency meter 15 indicating the frequency of the current between the slip-rings. The meter 15 closes a circuit through a coil 9, which operates a switch 8 to close the circuit of the switch coil 7, the switch 8 being maintained closed by a coil 10. A switch 4, connecting the direct-current generator 6 to the stator winding through the leads 5, may be operated simultaneously with the switch 3.
GB191424837D 1914-12-31 1914-12-31 Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working. Expired GB191424837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191424837T 1914-12-31

Publications (1)

Publication Number Publication Date
GB191424837A true GB191424837A (en) 1915-12-30

Family

ID=32673494

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191424837D Expired GB191424837A (en) 1914-12-31 1914-12-31 Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working.

Country Status (1)

Country Link
GB (1) GB191424837A (en)

Similar Documents

Publication Publication Date Title
GB191424837A (en) Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working.
US2287603A (en) Frequency changer set
US1331055A (en) Starting synchronous motors
US695937A (en) Alternating-electric-current generating and distributing system.
US745957A (en) Alternating-current motor.
US1255721A (en) Synchronous electric motor.
US745326A (en) Alternating-current motor.
US1526382A (en) Synchronous dynamo-electric machinery
US1449784A (en) Induction-motor speed regulation
GB108586A (en) Improvements in Methods of and Apparatus for Electric Ship Propulsion.
GB191513484A (en) Improvements in Dynamo Electric Machines.
GB190906103A (en) Improvements relating to Alternating Electric Current Machines.
GB124018A (en) Improvements relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working.
GB167242A (en) Improvements relating to dynamo electric machines adapted for synchronous working
GB191504079A (en) Improvements in Means for Collectively Actuating and Controlling Alternating Current Motors.
GB156813A (en) Improvements relating to the speed regulation of electric induction motors
GB196586A (en) Improvements in or relating to synchronized asynchronous machines
GB140554A (en) Improvements in or relating to the starting and synchronising of synchronous dynamo electric machines
GB210936A (en) Improvements in induction-starting synchronous motors
GB191414415A (en) Improvements in Dynamo Electric Machines.
GB191404359A (en) Improvements in and relating to the Starting of Synchronous Dynamo Electric Machines.
GB190501670A (en) Improvements in Alternating Electric Current Motors.
GB191309261A (en) Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working.
GB236565A (en) Improvements in and relating to speed control of induction motors
GB232968A (en) Improvements in and relating to alternating current dynamo electric machines