Topology and Characteristic Analysis of HVDC Axial Hybrid Excitation Doubly Salient Machine

doi:10.11985/2022.02.008

Abstract

Abstract:

The 270 V high voltage DC(HVDC) system is one of the important development directions of modern aircraft power system. According to the requirements of self-starting and short-circuit current limiting capabilities of high-voltage DC generator, an axial hybrid excitation doubly salient machine(AHEDSM) is proposed. Based on the description of the basic structure and working principle, the variation law of air gap magnetic field with excitation current is obtained by magnetic circuit analysis, which is verified by finite element simulation. The magnetic field distribution, flux linkage, back EMF, output voltage and load characteristics of the machine are analyzed in detail. The results show that the AHEDSM has bipolar variation of phase flux linkage, high sinusoidal degree and wide field regulation range, which can realize complete demagnetization. At the same time, the machine has high efficiency and is suitable for aviation high-speed operation.

Key words: 270 V high voltage DC system, axial hybrid excitation doubly salient machine, magnetic circuit analysis

CLC Number:

TM351

MA Xinchen, CHEN Zhihui. Topology and Characteristic Analysis of HVDC Axial Hybrid Excitation Doubly Salient Machine[J]. Journal of Electrical Engineering, 2022, 17(2): 65-72.

Figures/Tables 14

References 16

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参数	数值
机壳外径/mm	172
电机总长/mm	105
定转子长度/mm	30
定子外径/mm	164
气隙直径/mm	110.8
定子齿高/mm	19.7
转子内径/mm	56
转子齿高/mm	19
永磁体厚度/mm	4
永磁体宽度/mm	10
励磁绕组匝数	180
电枢绕组匝数	4×13

电机	功率/ kW	转速/ (r/min)	轴长/ mm	定子外径/ mm	功率密度/ (kW/m³)
DSEM	5.2	4 800~18 000	160	188	2 210
DSHEM	5.5	4 200~6 000	120	158	1 238