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
GB1340741A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co LtdfiledCriticalBritish Thomson Houston Co Ltd
Priority to GB1340741ApriorityCriticalpatent/GB551029A/en
Publication of GB551029ApublicationCriticalpatent/GB551029A/en
H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
H01F30/00—Fixed transformers not covered by group H01F19/00
H01F30/02—Auto-transformers
Landscapes
Engineering & Computer Science
(AREA)
Power Engineering
(AREA)
Motor And Converter Starters
(AREA)
Abstract
551,029. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd., and ANSCOMBE, L. D. Oct. 17, 1941, No. 13407. [Class 38 (iii)] A synchronous motor M or condenser, of which only one of the three phases is shown, is started by closing switch a, then switch b, then opening switch b and closing switch c. In order to reduce the choking effect of the upper half of the autotransformer windings T when these are being used as chokes, the core of the transformer is provided with air gaps in its magnetic circuit.
GB1340741A1941-10-171941-10-17Improvements in and relating to auto-transformers for starting synchronous motors and condensers
ExpiredGB551029A
(en)