Rolls-Royce Archives
         « Prev  Box Series  Next »        

From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Table of calculations for the ampere turns necessary to produce the required magnetic flux.

Identifier  ExFiles\Box 35\4\  scan 147
Date  30th April 1923 guessed
  
AMPERE TURNS NECESSARY TO PRODUCE FLUX REQUIRED

Part. | Matl. | Length ("). | Virtual section (sq.ins). | Total Flux. | Flux density Inch units. | Cg. units. | H.{Arthur M. Hanbury - Head Complaints} | AT. per inch. | A.T.
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Armature teeth. | Lamin. Iron. | .30 | 5.7 x .130 x 2.75 = 2.04 | 167000 | 82000 | 12700 | 15 | 30 | 9
Armature core. | " | .90 | 2 x .70 x 2.75 = 3.85 | 167000 | 43400 | 6730 | 5 | 10 | 9
Air gap. | Air. | .015 | 1.80 x 2.75 = 4.95 | 167000 | 33800 | 5230 | 5230 | 10500 | 158
Pole core. | M.S | .675 | .95 x 2.75 = 2.61 | 200000 | 76700 | 11900 | 15 | 30 | 20
Yoke. | M.S. | 1.96 | 2 x .275 x 4.0 = 2.2 | 200000 | 91000 | 14100 | 26 | 52 | 102

Total 298
Say 300
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙