In a research laboratory a special $3-$phase AC power is required. The AC power must have

the values of $50$ to $420$ V $($RMS$)$ adjustable line $($phase$-$to$-$phase$)$ output voltage and $20$ to

$100$ Hz adjustable output frequency. How can you generate that power? Design a

generation system and give the details.

Use the photo as a basis when solving the question. Please write correctly and clearly.

Use the photo as a basis when solving the question. Please write correctly and clearly.