波谱学杂志Issue(1)：78-86,9.DOI:10.11938/cjmr20150109
基于倍频移相的梯度放大器控制技术
A Control Technology for Gradient Amplifier Based on Multi-Frequency Shift
胡红兵 1王延龙 1赵红菊1
作者信息
- 1. 东软医疗设备系统有限公司，辽宁 沈阳 110179
- 折叠
摘要
Abstract
Based on multi-frequency shift, a novel technology was proposed for controlling gradient amplifier in magnetic resonance imaging. Phase-locked-loop (PLL) circuit was used to achieve phase shift, and insulated-gate bipolar transistor (IGBT) full-bridge to achieve parallel output current and output power inductor. An output negative feedback system and average current control on every bridge were used to achieve high power, low ripple and low noise current output for the amplifier. The technology was validated on a custom-made gradient amplifier.关键词
倍频移相/梯度放大器/核磁共振成像/IGBTKey words
multi-frequency shift/gradient amplifier/magnetic resonance imaging/insulated-gate bipolar transistor分类
数理科学引用本文复制引用
胡红兵,王延龙,赵红菊..基于倍频移相的梯度放大器控制技术[J].波谱学杂志,2015,(1):78-86,9.
