**Supply voltage changes from 100% to 50% at 1.5 s**

**Figure 25.** (**a**) The change in the voltage supply from 100% to 50% at 1.5 s. (**b**) Line current when the voltage changes from 100% to 50% at 1.5 s.

**Figure 26.** (**a**) Electromagnetic torque when the supply voltage changes from 100% to 50% at 1.5 s. (**b**) Electromagnetic torque vs speed when the supply voltage changes from 100% to 50% at 1.5 s.

As seen in Figure 27, the speed decreases due to the supply voltage being halved at 1.5 s; thus, the electromagnetic torque is less than the loading torque. This means that the machine is not able to operate under these specific conditions.

**Figure 27.** The speed when the supply voltage changes from 100% to 50% at 1.5 s.
