Abstract:
Induction motors are commonly used in most electricity generation due to their low investment cost. However, the
performance of the induction motors for different applications
highly depends on rotor design and machine geometry. For
example, changing rotor bar height and width varies the rotor
resistance and reactance, thereby leading to variation of the motor
efficiency. A parametric study on rotor slot geometry parameters
such as opening height, rotor slot depth, and rotor slot width,
is carried out to investigate the effect of the parameters on the
efficiency of a squirrel cage induction motor. The study is based
on analytical model that considers a general-purpose squirrel
cage induction motor with the specification of 5.5 kW, 60 Hz,
and 460 V. The analytical model is developed and simulated
within the MATLAB software environment. The effects of each
parameter variation toward efficiency of the induction motor are
investigated individually as well as all together using a 4D scatter
plot. Results show that the efficiency can be improved up to 0.1%
after designing a suitable setting of rotor slot parameters from
the initial settings.
