Affiliations: [a] Key Laboratory for Strength and Vibration of
Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China | [b] Institute of Mechatronics and Information Systems,
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi,
China | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Haipeng Geng, School of Mechanical
Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an
710049, Shaanxi, China. Tel.: +86 2982 6691 60; E-mail:
genhaipeng@mail.xjtu.edu.cn
Abstract: To evaluate the rotor temperature field of a high speed permanent
magnet synchronous generator (PMSG), an electromagnetic-eddy current-thermal
coupled field model is constructed using 2D Time-stepping Finite-Element-Method
(FEM). In the model, the electromagnetic field and the temperature field have
the same meshed grids to make a node-to-node data transmission and are solved
independently. The data transmission ensures the coupling of the fields and the
solve order of these fields is controlled by an external program.
Temperature-dependent parameters, for example conductivity, can be set in the
model. Windage loss of the rotor calculated by empirical formulas is loaded to
the temperature field. Distribution of the rotor temperature is obtained by a
calculation example of a 100 kW, 45000 r/min microturbine generator.
Experimental data are used to show the validity of the proposed model which is
helpful to the thermal design of the high speed PM generator.
