A 2.8 KW, 400V, 50Hz, 4 pole, 1370 rpm, delta connected squirrel cage IM has the following parameters referred to stator. R_1=2 Ohm, R_2=5, x_1=x_2=5 Ohm x_m=80 Ohm. Motor speed is controlled by...

A 2.8 KW, 400V, 50Hz, 4 pole, 1370 rpm, delta connected squirrel cage IM has the following parameters referred to stator. R_1=2 Ohm, R_2=5, x_1=x_2=5 Ohm x_m=80 Ohm. Motor speed is controlled by stator voltage control. When driving a fan load it runs at rated speed at rated voltage. calculate i) motor terminal voltage, current and torque at 1200 rpm and II) motor speed, current and torque for the terminal voltage of 300V