High-speed permanent magnet electrical machines — applications, key issues and challenges

THERMAL AND MECHANICAL ANALYSES OF HIGH-SPEED PERMANENT-MAGNET ELECTRICAL MACHINES Doctoral Dissertation

OF DOCTORAL DISSERTATION AALTO UNIVERSITY SCHOOL OF SCIENCE AND TECHNOLOGY P.O. BOX 11000, FI-00076 AALTO http://www.aalto.fi Author Zlatko Kolondzovski Name of the dissertation Thermal and mechanical analyses of high-speed permanent-magnet electrical machines Manuscript submitted 19.11.2009 Manuscript revised 11.02.2010 Date of the defence 06.08.2010 Monograph Article dissertation (summary + o...

Losses in High Speed Permanent Magnet Machines Used in Microturbine Applications

High speed permanent magnet (PM) machines are used in microturbine applications due to their compactness, robust construction, and high efficiency characteristics. These machines are integrated with the turbines and rotate at the same speeds. This paper discusses in detail the losses in high speed PM machines. A typical PM machine designed for microturbine application is presented with its deta...

Position/speed Sensorless Control for Permanent-magnet Synchronous Machines

Permanent-Magnet Synchronous Machines with Non-Overlapping Concentrated Windings for Low-Speed Direct-Drive Applications

Many geared electric drives can benefit from removing the gearbox and driving directly the load at low speed using a permanent-magnet synchronous machine (PMSM). PMSMs with non-overlapping concentrated windings are particularly attractive in low-speed direct drives since they allow, among other advantages, a high number of poles with a limited number of slots. Therefore, this thesis is dedicate...

Computer Based Motor Parameter Determination for High Speed Operation of Permanent Magnet Synchronous Machines

A method is presented which allows for the experimental determination of the characteristics of brushless PM synchronous machine parameters in the high speed operating range. The theory and real-time implementation is described for this computer based parameter identification method. Special computer assisted measuring techniques are conducted on a laboratory test setup, used to drive a commerc...