Open AccessModular and stackable power generators for efficient renewable power generation
Author(s) -
Kails Kevin,
Li Quan,
Mueller Markus
Publication year - 2019
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2019.0570
Subject(s) - stacking , modular design , generator (circuit theory) , power density , power (physics) , power module , modularity (biology) , electricity generation , electrical engineering , electromagnetic coil , computer science , mechanical engineering , materials science , automotive engineering , engineering , physics , nuclear magnetic resonance , quantum mechanics , biology , genetics , operating system
Stackable power generators enable very compact electric machines with high power density. How to identify an effective way of stacking is necessary and requires new knowledge for future guidance. In this study, both possibilities of stacking modules concentrically and axially are explored and compared. An axial flux generator based on the existing double claw pole design is used as a case study. The claw pole generator, which is modular and stackable, significantly benefits on‐site installation due to its flexible small modules that can be easily transported. This is particularly important to the installation of offshore wind turbines. Superconducting field windings are applied instead of copper in such power generators, which greatly increases their power density. In order to further increase their power density and reduce mass, the authors improved the modularity of 5 MW generators and stacked them in both ways. Results show that the power density versus mass as well as volume can be improved through stacking the modules both concentrically and axially, while the former approach is much more effective. Stacking two modules of 5 MW concentrically results in a 12.1 MW power generator with a more compact structure and higher power density than the original 10 MW generator.