Air-gap sensorless state estimation for electromagnetic levitation control using measured ripple current slope

カテゴリ: 研究会(論文単位)

論文No: LD16006

グループ名: 【D】産業応用部門 リニアドライブ研究会

発行日: 2016/01/26

タイトル(英語): Air-gap sensorless state estimation for electromagnetic levitation control using measured ripple current slope

著者名: Ahmed Salman(The University of Tokyo Graduate School of Engineering ),Koseki Takafumi(The University of Tokyo Graduate School of Engineering )

著者名(英語): Salman Ahmed(The University of Tokyo Graduate School of Engineering ),Takafumi Koseki(The University of Tokyo Graduate School of Engineering )

キーワード: Electromagnetic levitation|sensorless|air gap estimation|ripple current slope|duty cycle compensation|active magnetic bearings|Electromagnetic levitation|sensorless|air gap estimation|ripple current slope|duty cycle compensation|active magnetic bearings

要約(日本語): In this paper, air gap sensorless (self-sensing) electromagnetic levitation (EMS) control using current ripple slope measurement has been investigated. In sensorless EMS, high frequency is injected into the system by using a switching power amplifier. This results in a triangular high frequency waveform for current. Slope Measurement of such waveform requires high computational resources as well as a knowledge about duty cycle variation of switching amplifier. A new method has been proposed that makes use of the high resolution-single slope detection to compensate for the duty cycle variation by exactly controlling the timings of the gate signals for a switching amplifier without the use of a voltage sensor or a dedicated sense cycle as was done in recent preceding works. The proposed method has been verified by numerical simulations. Prospective practical problems are also discussed in detail

要約(英語): In this paper, air gap sensorless (self-sensing) electromagnetic levitation (EMS) control using current ripple slope measurement has been investigated. In sensorless EMS, high frequency is injected into the system by using a switching power amplifier. This results in a triangular high frequency waveform for current. Slope Measurement of such waveform requires high computational resources as well as a knowledge about duty cycle variation of switching amplifier. A new method has been proposed that makes use of the high resolution-single slope detection to compensate for the duty cycle variation by exactly controlling the timings of the gate signals for a switching amplifier without the use of a voltage sensor or a dedicated sense cycle as was done in recent preceding works. The proposed method has been verified by numerical simulations. Prospective practical problems are also discussed in detail

原稿種別: 英語

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