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
GB27053/29A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products IncfiledCriticalElectrical Research Products Inc
Publication of GB319274ApublicationCriticalpatent/GB319274A/en
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
H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
Landscapes
Engineering & Computer Science
(AREA)
Power Engineering
(AREA)
Control Of Multiple Motors
(AREA)
Abstract
319,274. Electrical Research Products, Inc., (Assignees of Morton, E. R.). Sept. 19, 1928, [Convention date]. Addition to 320,8S9. Constant-speed control systems. -The arrangement described in the parent Specification wherein a number of A.C. motors 7 - - 10 are automatically controlled to run at the same constant speed by taking current at variable frequency from an A.C. generator 6 driven by a constant-speed motor 18, is provided with resistances 36, 37, 38 connected to the rotors of the machines for the purpose of utilizing slip-energy in the rotor circuits and thus relieving the constantspeed motor 18 of an adjustable proportion of its load. The motors 7, 9 may drive cameras and the motors 8, 10, sound-recording machines. Specifications 275,582 and 297,153 are referred to.
GB27053/29A1928-09-191929-09-05Improvements in or relating to systems of control for alternating current electric motors
ExpiredGB319274A
(en)
A drive system that comprises at least three-phase induction asynchronous drive motors with ringing rings (Machine-translation by Google Translate, not legally binding)
Device for the regulation of speeds of rotary bodies and of members operated by means of rotary bodies (Machine-translation by Google Translate, not legally binding)