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: 7956707
• 负责人: CURT R DUNNAM
• 金额: $ 0.07万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7956707
• 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; Technology; 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.

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 我们为16 GHz脉冲ESR显微镜升级工作的一个重要目标是提高包括该仪器的电子子系统的可靠性。为了避免现有半正矢梯度线圈驱动器的不稳定可靠性导致的未来显著额外停机时间，该子系统已被拆卸，关键部分已被重新设计和重建。自重建以来，我们没有经历过任何进一步的运营中断，由于这一单位。升级部分包括隔离电源转换器、MOSFET驱动器、输出网络重构以及对窄带z轴恒流驱动器的反馈网络修改，以增强稳定性。在进行这些升级的过程中开发的工程改进目前正在应用于设计和建造具有更高峰值功率能力的下一代混合梯度驱动器系统。