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Question 5.4: Consider the “test” machine described in Chapter 1. This mac......

Consider the “test” machine described in Chapter 1. This machine is operating in steady state under its rated conditions, supplying its rated torque. At t = 1 second, the load torque suddenly goes to onehalf of its initial value and stays there. The objective is to maintain the speed of this machine at its initial value.
Design a vector control scheme with the d-axis aligned to the rotor flux. Design the speed loop to have a bandwidth of 25 rad/s and the phase margin of 60°. Design the torque (current) loop to have a bandwidth of 250 rad/second and a phase margin of 60°.
Simulate the system with and without the compensation terms and plot various quantities as functions of time.

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Question: 5.1

The motor model developed earlier, with the d-axis aligned with λr, can be used to model induction machines where vector control is not the objective. To illustrate this, we will repeat the simulation of Example 3-3 of a line-fed motor using this new motor model (which is much simpler) and compare ...

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