[1] Fukuda H, Takano H, Hatakeyama T, et al. A unique digital control scheme of multiple bridges power conversion circuit for advanced magnetic resonance imaging//Proceedings of the 6th International Conference on Power Electroncis and Variable Speed Drives[C]. UK: IET, 1996. 366-371. [2] Kawamura A, Haneyoshi T, Hoft R G. Deadbeat controlled PWM inverter with parameter estimation using only voltage sensor[J]. IEEE T Power Electr, 1988, 3(2): 118-125. [3] Zhuang Hui(庄慧), Huang Su-hua(黄苏华), Yuan Guo-chun(袁国春). Phaselock and Frequency Synthesize Techniques(锁相与频率合成技术)[M]. Beijing(北京): China Meteorological Press(气象出版社), 1996. [4] Zhu Tian-xiong(朱天雄), Liu Zao(刘造), Bao Qing-jia(鲍庆嘉), et al. A preamplifier system for water-cooled ultra-high field NMR spectrometers(基于水冷磁体的超高场核磁共振波谱仪前置放大器系统设计与实现)[J]. Chinese J Magn Reson(波谱学杂志), 2014, 31(2): 186-195. [5] Wang Hui-wang(王恢旺), Li Zheng-gang(李正刚), Mao Wen-ping(毛文平), et al. The design of an integrated gradient field/frequency lock shim system for NMR spectrometer(一体化NMR波谱仪梯度场频联锁匀场系统设计)[J]. Chinese J Magn Reson(波谱学杂志), 2012, 29(4): 489-498. [6] Fukuda, Nakaoka M. High-Frequency ZVS PWM Power Amplifier for Magnetic-Field Current Tracking Control Scheme and Its Design Considerations[C]. Proceedings of IEEE-PEDS, 1995: 238-245. |