parameters calculation,Time-stepping FEM

关键词:d-q axis cross-saturation,DDPMG,improved simulation

model,parameters calculation,Time-stepping FEM
摘要:In some control strategies of the direct-rive permanent

magnet generator(DDPMG),the mathematics model is excessively

simplified and some complex nonlinear characteristics,such as

core saturation and cross-saturation,are Ball Neodymium Magnets generally neglected.To

solve this problem,this paper utilizes the frozen element

permeability method to compute the armature self-and mutual-

inductance,permanent magnet d-and q-axis flux varying with d-axis

and q-axis current,then an improved model is presented in which

the core saturation and cross-saturation between d-axis and q-

axis are considered effectively.Based on this model,the method

for computing the performance of the generators is also

proposed.Taking a 1.5-MW DDPMG http://www.chinamagnets.biz/Neodymium/Ball-Neodymium-Magnets.php as an example,the time-stepping

finite element method(T-S FEM) is adopted to analyze the

performance with no-load and loaded conditions,the results show a

good agreement with the ones obtained by the improved

model.Compared with the simplified model,it is demonstrated that

the presented model has the high efficiency and reliability and

can provide a good reference for optimization design of DDPMG and

other PM motors.