Analysis of Electromagnetic and Losses Characteristics for 12 MW Permanent Magnet Synchronous Wind Generator

Due to its high-power density and compact size, high-power permanent magnet synchronous generator for offshore wind power generation has become a global research hotspot for wind turbines. However, there are many technical problems in the electromagnetic and loss characteristics of MW-level high-power wind generators, which have become the difficulties that researchers need to overcome at present. The accurate calculation of electromagnetic performances directly affects the losses characteristics calculation, and the accurate calculation of losses is important to estimate the thermal characteristics and furthermore design. Due to the time harmonics and space harmonics, there is however an increase in the external losses, leading to challenges in accurately calculating losses. For the design and manufacture of high-power wind generators, accurate calculation of electromagnetic performances and losses characteristics is more important. In this paper, the accurate calculation of electromagnetic performances and losses characteristics for the high-power semi-direct drive permanent magnet wind generator for offshore is carried out. The corresponding theoretical analysis is verified by a prototype experiment. These studies will be valuable references in designing and developing high-power off-shore wind turbines.