ESR MICROSCOPE HAVERSINE GRADIENT COIL DRIVER UPGRADE

ESR 显微镜哈弗辛梯度线圈驱动器升级

• 批准号: 8172185
• 负责人: CURT R DUNNAM
• 金额: $ 0.62万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8172185
• 关键词: Computer Retrieval of Information on Scientific Projects Database; Electronics; Engineering; Feedback; Funding; Future; Goals; Grant; Hybrids; Institution; Interruption; Microscope; Output; Physiologic pulse; Research; Research Personnel; Resources; Source; System; United States National Institutes of Health; design and construction; experience; improved; instrument; next generation; reconstruction

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. A significant goal of our upgrade effort for the 16GHz pulse ESR microscope has been improving the reliability of electronic sub-systems which comprise this instrument. To avoid significant additional future downtime caused by spotty reliability of the existing haversine gradient coil driver, this subsystem has been disassembled and critical sections have been redesigned and rebuilt. Since the rebuild, we have not experienced any further operational interruptions due to this unit. Upgraded sections include the isolation power converters, the MOSFET drivers, reconstruction of the output network and feedback network revisions to the narrow-band z-axis constant-current driver for stability enhancement. Engineering refinements developed in the course of making these upgrades are presently being applied to design and construction of next-generation hybrid gradient driver systems of higher peak power capability.

该子项目是利用该技术的众多研究子项目之一 资源由 NIH/NCRR 资助的中心拨款提供。子项目及 研究者 (PI) 可能已从 NIH 的另一个来源获得主要资金， 因此可以在其他 CRISP 条目中表示。列出的机构是 对于中心来说，它不一定是研究者的机构。 我们对 16GHz 脉冲 ESR 显微镜进行升级工作的一个重要目标是提高构成该仪器的电子子系统的可靠性。为了避免因现有半正弦梯度线圈驱动器的可靠性参差不齐而导致未来大量停机，该子系统已被拆卸，关键部分已重新设计和重建。自重建以来，我们没有因该设备而遭受任何进一步的运营中断。升级部分包括隔离电源转换器、MOSFET 驱动器、输出网络重构以及窄带 z 轴恒流驱动器的反馈网络修订以增强稳定性。在这些升级过程中开发的工程改进目前正应用于具有更高峰值功率能力的下一代混合梯度驱动器系统的设计和构造。