PENGHEMATAN ENERGI PADA MOTOR INDUKSI 3 FASA NEMA-D MELALUI PERUBAHAN FREKUENSI
NEMA-D induction motor is an induction motor with high slip that
has a high starting torque and low starting currents, this study simulates
the characteristics of model induction motor NEMA-D by changing the
operating frequency and calculate the input power with the change in
operating frequency at rated load 20% and 50% for energy savings. The
results show the smaller increase in the frequency of work resulted in a
maximum torque while the motor speed is decreased to a decrease in the
frequency of 80, 70, 60, 50Hz there is an increase of 162 Nm of torque,
186, 217, 260 Nm. Expenses 20% by changing the frequency of 80, 70,
60, 50Hz at 460V input voltage decrease of input power are 112684,
99684, 86684 , 73684 W, and load of 50% decline in the power of 21670
W, 205790 W, 184210 and 162500 W, by changing the working frequency
will be obtained on the induction motor to load energy savings of 20%
and 50% gained energy savings and reduction in velocity, respectively
34.6% and 33.4%.
Keyword: frequency variable, three-phase induction motors, NEMA D,
energy saving, characteristics
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