Squirrel-Cage Induction-Motor Core Losses
- 1 January 1925
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. XLIV (00963860) , 155-163
- https://doi.org/10.1109/t-aiee.1925.5061100
Abstract
An experimental method is presented for segregating the various no-load losses of a squirrel-cage induction motor. It is shown that for insulated rotor bars the losses consist principally of stator fundamental-frequency losses, rotor surface losses and eddy-current losses in the rotor bars due to radial and tangential slot-leakage fluxes in the rotor slots caused by reluctance pulsations in the air-gap between stator and rotor teeth. The pulsation losses vary about as the square of the air-gaP induction and about as the 1.2 power of the frequency. The surface losses for the particular slots described are from ¿ to ¿ of the total pulsation losses. The pulsation losses are approximately the same whether or not the rotor bars are connected by end rings, and are approximately equal to the stator fundamental-frequency losses.Keywords
This publication has 1 reference indexed in Scilit:
- Tooth pulsation in rotating machinesJournal of the A.I.E.E., 1924