Fine Output Voltage Control Method considering Time-Delay of Digital Inverter System for X-ray Computed Tomography
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概要
- 論文の詳細を見る
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.
- 社団法人 電気学会の論文
- 2011-11-01
著者
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Ohishi Kiyoshi
Nagaoka Univ. Technol.
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TAKANO Hiroshi
Hitachi Medical Co.
-
Shibata Junji
Nagaoka University Of Technology
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KANEKO Kazuhide
Nagaoka University of Technology
-
ANDO Itaru
Akita National College of Technology
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OGAWA Mina
Hitachi Medical Corporation
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Takano Hiroshi
Hitachi Medical Corporation
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