Holooly Plus Logo
Holooly Plus Logo

Question 5.3: Repeat the vector control of Example 5-2 by replacing the CR......

Repeat the vector control of Example 5-2 by replacing the CR-PWM inverter by a space vector pulse width-modulated inverter, which is assumed to be ideal. The speed loop specifications are the same as in Example 5-2. The current (torque) loop to generate reference voltage has 10 times the bandwidth of the speed loop and the same phase margin of 60°.

Step-by-Step
The 'Blue Check Mark' means that this solution was answered by an expert.
Learn more on how do we answer questions.
Report Answer

Calculations for the initial conditions are repeated in the MATLAB file EX5_3calc.m, which is included on the accompanying website. It also shows the procedure for calculating the gain constants of the PI controller of the current loop. The simulation diagram of the SIMULINK file EX5_3.mdl (included on the accompanying website) is shown in Fig. 5-14, and the simulation results are plotted in Fig. 5-15.

1025373 Fig. 5-14
1025373 Fig. 5-15

Related Answered Questions

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 ...

Verified Answer:

We need to recalculate initial flux values because...
Question: 5.4

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 ...

Verified Answer:

See the complete solution on the accompanying webs...
Question: 5.2

In this example, we will consider the drive system of Example 5-1 under vector control described earlier. The initial conditions in the motor are identical to that in the previous example. We will neglect the torque loop in this example, where all the motor parameter estimates are assumed to be ...

Verified Answer:

Initial flux values are the same as in Example 5-1...