Question 2 25 Marks (a) Draw a block diagram showing essential modules in a synchronous frame vector control scheme for an AC machine. Your block diagram must show the locations of AC machine, inverter/drive, 2-3 and 3-2 transformation blocks, dq- and a-da transformation blocks, transformation angle calculation/estimation block and the current controller. Please also make sure you clearly show the essential signal flaw paths etc also in your block diagram. (10 Marks) (b) Write down 2-3 and 3-2 transformations in matrix form and briefly explain possible choices for the scaling constant K used in these transformations. (9 Marks) (c) Write down dq-a and a-da transformations in matrix form and draw their block diagram realizations. (6 Marks) Question 2 25 Marks (a) Draw a block diagram showing essential modules in a synchronous frame vector control scheme for an AC machine. Your block diagram must show the locations of AC machine, inverter/drive, 2-3 and 3-2 transformation blocks, dq- and a-da transformation blocks, transformation angle calculation/estimation block and the current controller. Please also make sure you clearly show the essential signal flaw paths etc also in your block diagram. (10 Marks) (b) Write down 2-3 and 3-2 transformations in matrix form and briefly explain possible choices for the scaling constant K used in these transformations. (9 Marks) (c) Write down dq-a and a-da transformations in matrix form and draw their block diagram realizations. (6 Marks)