Design Study of a Permanent Magnet Assisted Synchronous Reluctance Generator for Wind Turbines
Author
Imbaquingo Muñoz, Carlos Enrique
Term
4. term
Education
Publication year
2018
Submitted on
2018-05-31
Pages
92
Abstract
Dette speciale udvikler og evaluerer en ferritmagnet-assisteret synkrongenerator (FMaSynRG) ved hjælp af finite element-analyse (OperaFEA) og styredesign. Først simuleres en eksisterende 13 kW synkronreluktansmaskine (SynRM), og centrale elektromagnetiske størrelser valideres mod målinger. Dernæst designes en 4-polet 5 MW FMaSynRG, hvor rotoregenskaber som asymmetriske fluxbarrierer (formede luftområder, der leder den magnetiske flux) og graden af magnetdækning indgår. Resultaterne sammenlignes med en 8-polet 5 MW indvendig permanentmagnet-synkrongenerator (IPMSG), som opnår tilsvarende ydeevne med lavere vægt af aktivt materiale. Endelig modelleres et vindkraftsystem med FMaSynRG og en MTPA-strategi (maksimalt moment per ampere). Den digitale styring afkobler strømmenes koblede dynamik og tager højde for beregnings- og pulsbredde-modulation (PWM) forsinkelser.
This thesis develops and evaluates a ferrite magnet-assisted synchronous generator (FMaSynRG) using finite-element analysis (OperaFEA) and control design. First, an existing 13 kW synchronous reluctance machine (SynRM) is simulated, and key electromagnetic quantities are verified against measurements. Next, a 4-pole, 5 MW FMaSynRG is designed, explicitly considering rotor features such as asymmetric flux barriers (shaped air regions that steer magnetic flux) and the extent of magnet coverage. The results are compared with an 8-pole, 5 MW interior permanent-magnet synchronous generator (IPMSG), which achieves similar performance with a lower mass of active materials. Finally, a wind power generation system using the FMaSynRG is modeled and a maximum-torque-per-ampere (MTPA) strategy is applied. The digital controller decouples current dynamics and accounts for computation and pulse-width modulation (PWM) delays.
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