Optimization Design Of Permanent Magnet Synchronous Generator With Low Voltage Regulation Rate

As the rapid development of science and technology, power electronics has got an unprecedented progress. Methods of generating electricity by renewable energy sources like low-carbon economy, smart power grids, new power technology have received great attention from researchers all over the world. Permanent magnet synchronous generator(PMSG) leaves out field winding and so on than the ordinary generator. so it has attracted more and more attention. Because in PMSG is hard to regulate and control, PMSG’s applied range is limited, so how to reduce generator’s inherent voltage regulation becomes a difficulty.In this thesis, research object is a PMSG with 320 kW rated power, 12-pole inner rotor, which revolving speed is 6000r/min. The research design begins from generator internal characteristics, its rotor and stator parameters, model and measurement of permanent magnet.Firstly, the author through the understanding of the status quo of the development of PMSG at home and abroad, find out the problems. PMSG voltage regulation still rests on quantitative analysis and single parameter optimization, so field-circuit method is adopted to design multi-parameters optimized PMSG with lower voltage regulation.Then, computational formula of PMSG voltage regulation is deduced. Quantitatively analyze parameters that affected voltage regulation, such as size of stator slot, gas length, impact of permanent magnet, core length, number of series turns per phase in inner rotor PMSG.Finally, based on DMAIC, six sigma management method, and combined Taguchi to calculate and analyze factors which affected PMSG voltage regulation. When generator’s stability can be guaranteed, size of stator slot, gas length, impact of permanent magnet and core length multi-parameters are optimized, and PMSG with lower voltage regulation is designed.