電気学会論文誌D(産業応用部門誌)
Online ISSN : 1348-8163
Print ISSN : 0913-6339
論文
Fine Output Voltage Control Method considering Time-Delay of Digital Inverter System for X-ray Computed Tomography
Junji ShibataKazuhide KanekoKiyoshi OhishiItaru AndoMina OgawaHiroshi Takano
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131 巻 (2011) 11 号 p. 1331-1337

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This paper proposes a new output voltage control for an inverter system, which has time-delay and nonlinear load. In the next generation X-ray computed tomography of a medical device (X-ray CT) that uses the contactless power transfer method, the feedback signal often contains time-delay due to AD/DA conversion and error detection/correction time. When the PID controller of the inverter system is received the adverse effects of the time-delay, the controller often has an overshoot and a oscillated response. In order to overcome this problem, this paper proposes a compensation method based on the Smith predictor for an inverter system having a time-delay and the nonlinear loads which are the diode bridge rectifier and X-ray tube. The proposed compensation method consists of the hybrid Smith predictor system based on an equivalent analog circuit and DSP. The experimental results confirm the validity of the proposed system.

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© 2011 by the Institute of Electrical Engineers of Japan
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