TY - JOUR
T1 - Development of Concentric-Winding Type Three-Phase Variable Inductor
AU - Nakamura, Kenji
AU - Honma, Koya
AU - Ohinata, Takashi
AU - Arimatsu, Kenji
AU - Kojima, Takehiko
AU - Yamada, Makoto
AU - Matsumoto, Ryohei
AU - Takiguchi, Masaya
AU - Ichinokura, Osamu
N1 - Publisher Copyright:
© 1965-2012 IEEE.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - A variable inductor, which consists of only magnetic core and primary dc and secondary ac windings, can control effective inductance of the secondary ac winding by the primary dc current due to the magnetic saturation effect. Hence, the variable inductor can be applied as a VAR compensator for voltage regulation in electric power systems. In a previous paper, a novel concentric-winding type three-phase variable inductor was proposed, in which the primary dc and secondary ac windings are concentrically wound on the same leg. It was indicated by a numerical analysis that the proposed variable inductor has good controllability and low distortion current. This paper presents the experimental results of a 4 kVA concentric-winding type threephase variable inductor. Furthermore, to prove the advantage of the proposed variable inductor, copper and iron losses, leakage flux, and reactive power per weight are compared with those of the previous variable inductor. It is demonstrated that the copper loss of the proposed variable inductor is improved by 40%, the leakage flux is reduced by half, and the weight can be reduced by 40% in comparison with the previous variable inductor.
AB - A variable inductor, which consists of only magnetic core and primary dc and secondary ac windings, can control effective inductance of the secondary ac winding by the primary dc current due to the magnetic saturation effect. Hence, the variable inductor can be applied as a VAR compensator for voltage regulation in electric power systems. In a previous paper, a novel concentric-winding type three-phase variable inductor was proposed, in which the primary dc and secondary ac windings are concentrically wound on the same leg. It was indicated by a numerical analysis that the proposed variable inductor has good controllability and low distortion current. This paper presents the experimental results of a 4 kVA concentric-winding type threephase variable inductor. Furthermore, to prove the advantage of the proposed variable inductor, copper and iron losses, leakage flux, and reactive power per weight are compared with those of the previous variable inductor. It is demonstrated that the copper loss of the proposed variable inductor is improved by 40%, the leakage flux is reduced by half, and the weight can be reduced by 40% in comparison with the previous variable inductor.
KW - VAR compensator
KW - concentric-winding
KW - electric power systems
KW - variable inductor
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U2 - 10.1109/TMAG.2015.2441556
DO - 10.1109/TMAG.2015.2441556
M3 - Article
AN - SCOPUS:84946234503
VL - 51
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 11
M1 - 07118217
ER -