HI, I should design a test bench for electric motors that run at most at 8000 rpm and have a maximum torque of 50-60 Nm with 11kw of maximun power.I ask for a suggestion for a brake motor model to be inserted in the bench  within 15/20 kw of nominal power and that is flexible enough for this type of use.

Which motors ( and inverter) from the Siemens catalogue might be most appropriate for this type of use?

My idea would be to insert an asynchronous motor but if someone has experience with synchronous motors inserted as a brake in a test bench I gladly accept advice.  Thanks in advance to those who want to give me some suggestions.

Daniel

I have done this project once.

Consider: if you use two motors bench, you always need a double energizer and double sided equipment for testing.

I chose an inductive load, with a gearbox and stop/ safety brake. It is a induction brake used on trucks, machinery, etc. It works on rotation, so a gearbox is necessary. I used a two-speed (1:2, 1:6) gearbox (+ freewheel position). So it was possible to test motors from IEC 70 to IEC320; and 2 or up to 12 poles. 

Of course, it is possible to use very different parts and in very different price ranges on this project.

Principle of induction brake: Link ;

Good luck..