The objective of this paper is to identify suitable generator concepts for direct-drive wind turbines by reviewing directdrive and geared generator systems. Usually, in literature, comparison of different generator systems is discussed with the criteria based on the energy yield, cost, and weight. Because direct-drive permanent-magnet machines are more superior in terms of the energy yield, rel...

The trend towards the adoption of direct drive washing machines utilizing PM motors is increasing due to the mechanical simplicity, high performance and efficiency of the system. This work deals with design and performance of a sensorless PM motor drive for washing machines. An implicit rotor position detection unit which consists of groups of search coils are inserted into the motor stator. A ...

In this study a novel servo speed control system for travelling-wave ultrasonic motor (TWUSM) has been presented. A drive system has been built based on two-phase high-frequency inverter using mechanical resonant frequency of the ultrasonic motor. The TMS320F243 digital signal processor (DSP) is adapted to ultrasonic motor drive system. The speed control of ultrasonic motor has been implemented...

A high dynamic control system for the Alspa VDM 7000 medium voltage drive was implemented, which provides fast torque response times of a few milliseconds despite the typically low switching frequency of GTO thyristors that is necessary to achieve high efficiency. The drive system consists of a three-level voltage source converter with active front-end and a synchronous motor. The drive has mos...

Mechanical and Aerospace Engineering Department and Center for Energy Research, 460 EBU-II, University of CaliforniaSan Diego, 9500 Gilman Drive, La Jolla, CA 92093-0438, USA, [email protected] Fusion Nuclear Technology Consulting, Fliederweg 3, 76351 Linkenheim, Germany University of Wisconsin, Fusion Technology Institute, Madison, WI 53706, USA Center for Energy Research, 460 EBU-II, Un...

Mechanical and Aerospace Department and Center for Energy Research, 458 EBU-II, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 90093-0438, USA [email protected] University of Wisconsin, Fusion Technology Institute, Madison, WI 53706, USA, [email protected] Consultant, Fliederweg 3, D 76351 Linkenheim-Hochstetten, Germany, [email protected] Center for Energy Resear...