J. Heissenberger, F. Kogler, E. Prand-Stritzko, J. Karner, M. Hofinger, M. Baldinger:
"Development of an integrated tubular electric drive for rotating shafts in agricultural applications";
Talk: International Conference on Agricultural Engineering, Hannover, Germany; 11-08-2013 - 11-09-2013; in: "Proceedings of 71st International Conference on Agricultural Engineering", (2013), 1 - 7.

In this paper a new designed electric motor [1], especially for agricultural applications will be presented. The motor is designed as an outer-runner permanent magnet synchronous motor. Due to its tubular outer-runner design it can be integrated into the rotating parts of the machinery, such as tubes, drums, cylinders and so forth. The developed and constructed motor was integrated into mowing conditioner. With a nominal torque of 100 Nm and a nominal speed of 1000 rpm it can provide a nominal power of about 10.5 kW, having compact dimensions for agricultural applications. Moreover the motor has an overload capability of 1.4 times the nominal torque at rated speed.

http://publik.tuwien.ac.at/files/PubDat_223872.doc