KIEE International Transaction on Electrical Machinery and Energy Conversion Systems

The Korean Institute of Electrical Engineers (대한전기학회)
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Series Compensated Step-down AC Voltage Regulator using AC Chopper with Transformer

  • Ryoo, H.J. (Industriy Application Laboratory, KERI) ;
  • Kim, J.S. (Industriy Application Laboratory, KERI) ;
  • Rim, G.H. (R&D Office, KERI)
  • Published : 2005.09.01
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Abstract

This paper describes a step-down AC voltage regulator using an AC chopper and auxiliary transformer, which is a series connected to the main input. The detail design of the AC regulator, logic and PWM pattern of the AC chopper is described and the three-phase AC regulator using two single­phase AC choppers with a three transformer configuration is proposed for three-phase application. The proposed three-phase system has the advantages of lower system cost due to reduced switch number and gate driver circuit as well as advantages of decreased size and weight because it uses a series compensated scheme. The proposed AC regulator has many benefits such as fast voltage control, high efficiency and simple control logic. Experimental results indicate that it can be used as a step-down AC voltage regulator for power saving purposes very efficiently.

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References

  1. B.-H. Kwon, B.-D. Min, J.-H. Kim, Novel Topologies of AC Choppers, IEE Proc.-Electr. Power Appli., Vol. 143, No. 4, pp. 323-330, July 1996 https://doi.org/10.1049/ip-epa:19960374
  2. Y. Okuma, PWM Controlled AC Power Supply based on AC Chopper Technology and Its Application, Trans. IEE Japan, Vol. 119-D. No.3, pp. 412-418, 1998
  3. Do-Hyun Jang, Gyu-Ha Choe, Step-Up/Down AC Voltage Regulator Using Transformer with Tap Changer and PWM AC Chopper, Trans. on Industrial Electronics, Vol. 45, No. 6, pp. 905-911, 1998 https://doi.org/10.1109/41.735334