Consider a two-phase machine with the flux linkage equations:
![1125_60bc5f4c-f275-4793-bc54-123aaf12da27.png](https://secure.tutorsglobe.com/CMSImages/1125_60bc5f4c-f275-4793-bc54-123aaf12da27.png)
Where θr is the electrical rotor position Determine a set of qd flux linkage equations that are rotor position invariant. To do this, you will need to establish a suitable reference-frame transformation.