摘要详情

ID / 提交时间

9 / 2022-05-18 22:07:42

标题

A New Repetitive Flat-top Pulsed Magnetic Field Power Supply for Gradient Driver in MRI

关键字

Current Regulation,Gradient Driver,Magnetic Resonance Imaging (MRI),Partial Power Processing,Pulsed Power Techniques

主题及专题

High Magnetic Field Engineering and Fusion Technology > Pulsed strong magnetic field technology

状态

终稿

作者

Dandi Zhang / Huazhong University of Science and Technology;School of Electrical and Electronic Engineering

Hongfa Ding / Huazhong University of Science and Technology；Wuhan National High Magnetic Field Center;School of Electrical and Electronic Engineering

Zhou He / Huazhong University of Science and Technology;School of Electrical and Electronic Engineering;Wuhan National High Magnetic Field Center

Siqi Huang / Ultra High Voltage Branch of the State Grid Jiangsu Province Electric Power Co., LTD.

Yongxiu Song / Huazhong University of Science and Technology

摘要

For the power supply of the gradient coil set in Magnetic Resonance Imaging (MRI) system, i.e. the gradient driver, a highly stable flat-top current with a fast rising stage and fast falling stage is needed. This article proposed a novel topology using partial power processing to generate the current repetitively, which can significantly reduce the switching frequency of all switching devices compared with conventional topologies. Topology analysis and parameter design have been made for a 2000A peak current, 20ms flat-top, 500μs rising time, 1000 ppm stability application situation. And simulation results verified the proposed topology’s superiority in lower switching frequency.