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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).
Graph showing Hysteresis and Eddy Current losses in a self-starter motor armature at 1500 RPM.

Identifier  ExFiles\Box 34\3\  Scan127
Date  15th May 1916 guessed
  
HYSTERESIS AND EDDY CURRENT LOSSES
IN 17 SLOT ARMATURES OF
R.R. SELF STARTER MOTOR AT 1500 RPM

DRIVING MOTOR ARMATURE CURRENT (AMPERES)
STARTER MOTOR EXCITING CURRENT (AMPERES)

B } BOTH WOUND
A }

HYSTERESIS AND EDDY CURRENT LOSSES

THIS ORDINATE REPRESENTS DRIVING MOTOR LOSSES DRIVE FRICTION AND BEARING FRICTION AND WINDAGE LOSSES.

LOSSES ARE OBTAINED IN WATTS BY MULTIPLYING SCALE AMPERES BY 78.5 VOLTS.
  
  


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