We basically do the same testing by putting a pulley on the test motor and hang weights or pull by force springs. THE torque value is the product of weight/force and radius of pulley.You can change force values and vary speeds to get a complete torque-speed curve.
AT 30Kw and 36000 RPM, you require 8NM torque.IF thats OKay you can try KAVO germany(www.kavo.de).You can try EV 13580-4 a 4 pole motor which can give your performance @ 600HZ.There a company in INDia AShwath Electric (Ashelec_Ksiyer@rediffmail.com) that has done 15KW @ 24000 RPM.
I think you can find universal motors from all power tool manufacturers!Or are you planning something different.We are planning a Brushless version for a similar application with a controller outside.Are you interested.We expect to roll out production during first week of July.The OD is expected...