Modeling and Self-Excitation Analysis of Split Cascade Brushless Excitation Pulsed Alternator System

Aiming at the problem that self-excitation of air-core pulsed alternator using brush and slip ring reduces the system life and reliability, a split cascade brushless excitation pulsed alternator is studied in this article. First, the structure and working principle of the system are analyzed, and a...

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Bibliographic Details
Published inIEEE transactions on plasma science Vol. 52; no. 3; pp. 1012 - 1024
Main Authors Chen, Yingjie, Wang, Youlong, Wei, Jialin, Li, Wenchao, Xu, Fan, Zhang, Ying
Format Journal Article
LanguageEnglish
Published New York IEEE 01.03.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Alternators
Brushless excitation
cascade systems
Commutation
Complex systems
Coordinates
Design parameters
Discharges (electric)
Energy conversion
Finite element analysis
Finite element method
Inductance
Magnetic fields
Mathematical analysis
Mathematical models
polyphase machine
pulsed alternator
Rotors
Self excitation
Slip rings
Stator windings
Thyristors
Windings
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Summary:Aiming at the problem that self-excitation of air-core pulsed alternator using brush and slip ring reduces the system life and reliability, a split cascade brushless excitation pulsed alternator is studied in this article. First, the structure and working principle of the system are analyzed, and a dynamic mathematical model is established under natural coordinate system, considering the mutual inductance of the winding and the electromechanical energy conversion relationship. The correctness of the model is verified by field-circuit coupled finite element method. Second, the self-excitation process of the complex system is studied, and the influence mechanism of thyristor commutation is analyzed. The relationship between the self-excitation critical speed and the system parameters is deduced theoretically and verified by the established model. The results show that compared with the field-circuit coupled finite element method, the dynamic mathematical model has higher computational efficiency and flexibility of parameter adjustment. Considering the influence of nonideal factors, the calculation of self-excitation critical speed has higher accuracy and is instructive for the preliminary parameter design of the system.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2024.3377646