Field-circuit analysis of load characteristics of stand-alone PM synchronous generator connected to R-L type load

This paper deals with the field-circuit method for calculation of the load characteristics of stand-alone permanent magnet synchronous generator (PMSG) connected to R or R-L type load. This method is based on the so-called loading method [1] divide [3], used widely for calculation of lumped parameters of permanent magnet synchronous motor equivalent circuit model. In the developed calculation algorithm, the circuit equations of PM synchronous machine are adopted so to represent the generative mode of stand-alone operation with the assumption that the load is purely of R or R-L type. The results of load characteristic calculations are compared to the laboratory test results. Described in the paper field-circuit loading method can be used for prediction of load characteristics of PMSGs with different radial rotor constructions, with surface mounted or interior mounted permanent magnets.