AC MOTOR TEST BENCH UPTO 48KW

Dear ALL,

Basically i want to design motor test bench upto 50KW with rotating torque sensor and regenerative braking mechanism.

In my case i want to develop FOUR QUADRANT ELECTRO DYNOMOMETER for observe the four quadrant operation.

My Question mention below:

1. If i coupled three phase asynchronous motor with other induction motor.(load motor and brake motor both are AC three phase induction motor) mechanically coupled and both are drive with VFD. What happen when load motor drives on 30Hz and brake motor drive on 20Hz. both drive in same direction.
2. I want to measure torque vs speed graph and motor efficiency.
3. Guide me how to select VFD's Torque sensor and DAQ card and software for gathering data.
4. Any highly accurate sensor which us previously and working perfectly right now.
 
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