共 30 条
Comparison of Thyristor Rectifier Configurations for a Six-Phase Rotating Brushless Outer Pole PM Exciter
被引:26
作者:
Noland, Jonas Kristiansen
[1
,2
]
Evestedt, Fredrik
[3
]
Perez-Loya, J. Jose
[3
]
Abrahamsson, Johan
[3
]
Lundin, Urban
[3
]
机构:
[1] Uppsala Univ, Dept Engn Sci, Div Elect, S-75121 Uppsala, Sweden
[2] Univ Coll Southeast Norway, Fac Technol Nat Sci & Maritime Sci, N-3184 Borre, Norway
[3] Uppsala Univ, S-75121 Uppsala, Sweden
关键词:
Active rectification;
brushless exciters;
fast-response exciters;
hybrid-mode operation;
multiphase machines;
outer pole permanent-magnet (PM) machines;
rotating exciters;
synchronous generators;
12-pulse thyristor rectifiers;
SYNCHRONOUS MACHINES;
EXCITATION;
GENERATOR;
OPERATION;
DIODE;
D O I:
10.1109/TIE.2017.2726963
中图分类号:
TP [自动化技术、计算机技术];
学科分类号:
0812 ;
摘要:
Recent technological developments have caused a renewed interest in the brushless excitation system. With the application of wireless communication, the conventional diode bridge has been replaced with fully controllable thyristors on the shaft. It offers the same dynamic performance as the conventional static excitation system. The thyristor bridge of the conventional three-phase exciter needs to be controlled with a high firing angle in normal operation in order to fulfill a requirement of both a high ceiling voltage and a high ceiling current. A high firing angle causes high torque ripple to be absorbed by the exciter stator and a low power factor results in a low utilization of the designed exciter. In this contribution, we present a strategy that solves this problem by looking into combinations of thyristor configurations of a double-star six-phase connection of the exciter. Experimental results are used to verify the circuit models implemented for this investigation. A hybrid-mode 12-pulse thyristor bridge configuration seems to be a good solution for implementations in commercial apparatus. An additional switch interconnects two separate thyristor bridges from parallel-to series connection at the rectifier output, and utilizes the advantages of both topologies.
引用
收藏
页码:968 / 976
页数:9
相关论文