9.a) List the factors that determine the maximum developed torque of the induction motor.
(6)
b)The primary and secondary windings of a 500 KVA transformer have resistances of 0.42 and 0.0019 respectively. The primary and secondary voltages are 11 000 V and 415 V respectively and the core loss is 2.9 kW, assuming the power factor of the load to be 0.8. Calculate the efficiency on
(i) Full load.
(ii) Half load;
(10)
Reference Answer
### Part (a): Factors Determining Maximum Developed Torque of an Induction Motor The maximum torque, also known as breakdown or pull-out torque, is the highest torque an induction motor can produce. The key factors that determine this value are derived from the torque equation: $$ T_{max} = \frac{k \cdot V_1^2}{2X_2} $$ Where:
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