Repeat Problem 7, except choose the current command so as to minimize the required dc voltage.
Problem 7
A four-pole permanent-magnet ac motor drive has the following parameters:
![877_78f9774f-dfa7-4e6a-9fc0-a7c56e10f1a5.png](https://secure.tutorsglobe.com/CMSImages/877_78f9774f-dfa7-4e6a-9fc0-a7c56e10f1a5.png)
The machine is to deliver 10 Nm at a mechanical rotor speed of 200 rad/s. Compute the q- and d- axis current commands such that the power factor is maximized. What is the rms voltage and current applied to the machine, and what is the efficiency?