PWM Power Amplifier with Digital Optimal Preview Current Control Scheme for Gradient Magnetic Field in MRI Systems
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- Watanabe Shuji
- Matsue National College of Technology
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- Takano Hiroshi
- Hitachi Medical Corporation
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- Hiraki Eiji
- Yamaguchi University
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- Nakaoka Mutsuo
- Yamaguchi University
Bibliographic Information
- Other Title
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- MRI傾斜磁場発生用PWM電力増幅器の電流パターン追従ディジタル最適予見制御
- MRI ケイシャ ジバ ハッセイヨウ PWM デンリョク ゾウフクキ ノ デンリュウ パターン ツイジュウ ディジタル サイテキ ヨケン セイギョ
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Abstract
This paper deals with a two-paralleled switch-mode PWM power amplifier using current pattern tracking scheme in order to generate a gradient magnetic field in the Magnetic Resonance Imaging (MRI) system. This power conversion circuit has 8-IGBTs at their inputs/outputs so as to realize further high-power density, and to reduce current switching ripple of the Gradient Coils (GCs) as well as to raise current responses. The modern optimal preview control implementation in 2 parallel bridge type PWM power amplifier can improve the quick and precise current pattern tracking control responses in accordance with the specified values for the magnetic field in GCs. It is clearly proven from a theoretical point of view that the proposed control software is to be enlarged highly the diagnostic target and improves the image quality of MRI systems.
Journal
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- IEEJ Transactions on Industry Applications
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IEEJ Transactions on Industry Applications 121 (7), 756-763, 2001
The Institute of Electrical Engineers of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001204658876544
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- NII Article ID
- 10006088454
- 10012556520
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- NII Book ID
- AN10012320
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- ISSN
- 13488163
- 09136339
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- NDL BIB ID
- 5827312
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed