Open AccessDevelopment of magnetic‐wedge linear adjustable reactor
Author(s) -
Guan Ruiyang,
Wei Xinlao,
Chen Qingguo
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8690
Subject(s) - inductance , wedge (geometry) , magnetic circuit , air gap (plumbing) , mechanics , piecewise linear function , magnetic flux , magnetic field , physics , control theory (sociology) , materials science , voltage , mathematical analysis , electrical engineering , mathematics , optics , computer science , engineering , quantum mechanics , composite material , control (management) , artificial intelligence
Adjustable reactor is an important VAR compensator for AC system, so it has practical significance to do researches on this device. This paper proposed a method of adjusting inductance value based on a controlled magnetic‐wedge, which could change the air‐gap in the magnetic path by adjusting the depth it inserted. The reactor based on this method was named as magnetic‐wedge linear adjustable reactor. Its working principle and inductance's mathematical models were analysed in detail. ANSYS was used to simulate reactor's magnetic field in order to verify the analysis previously. A prototype was made and its inductance's adjustment curve was measured. Results showed that: the inductance's adjustment curve was a piecewise function. When the magnetic‐wedge was in positive section, the relationship between inductance and depth of magnetic‐wedge inserted was a linear function. If the magnetic‐wedge was totally inserted, the air‐gap was minimum while inductance was maximum. If the magnetic‐wedge was totally pulled out, the air‐gap was maximum while inductance was minimum. When the magnetic‐wedge was in negative section, the relationship between inductance and magnetic‐wedge's position was a double‐exponential function, the nearer magnetic‐wedge's position was, the more sensitively the inductance changed. Magnetic‐wedge could control magnetic flux path and restrain air‐gap edge effect.