型钢轧边机电气传动系统改造

针对速度和压下量要求相对较低的E1轧边机进行电气传动系统改造,用西门子变频器替代现有东芝变频器,缓解因备件紧缺而可能造成的长时间停机问题。本课题主要针对E1轧边机电气传动系统的改造进行了研究与应用。     

Development of a “best representativity” method for experimental data analysis and an application to the critical experiments at the Toshiba NCA facility

For nuclear critical experiments, it is essential to certify similarities of the experiment with the objective of the actual reactor conditions or actual reactor equipment. To judge the applicability of the experimental data, the concept of a “representativity factor” has recently been adopted in the critical experiment field, particularly for fast breeder reactors and future reactor studies. In this study, we extended this concept to the design of a light water reactor system. We developed a new numerical evaluation method and a calculation system. The method is based on a linear combination of the sensitivity coefficient vector of an experiment in which the representativity factor to the target system is maximized to utilize experimental data effectively. Simultaneously, using the measurement data of critical experiments, the method enables us to evaluate calculation errors caused by errors or uncertainties of physical parameters. The derivation of the new calculation method is explained first. We then qualify it with a sample calculation, presenting numerical results for three kinds of critical experiments conducted at the Toshiba Nuclear Critical Assembly facility. Finally, the results are compared with those of an extended bias factor method to clarify the performance of the new method.     

基于东芝TMPM374微处理器无刷直流电机变频控制

为了响应绿色环保,节约能耗,降低噪音,直流变频调速发展越来越普及,调速的性能也不断地提高。矢量控制理论经过几十年的发展,技术也比较成熟。为此东芝开发了基于ARM Cortex-M3内核的M370系列微处理器,该系列微处理器主要用于电机控制,内置了硬件矢量引擎VE,矢量控制算法由硬件实现。东芝TMPM374作为主控制器,和东芝IPD功率驱动模块及电流采样模块,构成了无位置传感器的无刷直流电机变频驱动控制方案。该方案利用微处理器内置的硬件矢量引擎VE,减少了软件工作量,软硬件巧妙的配合,输出三相正弦波来控制电机,使整个控制系统成本低,能耗低,噪音低,在家电变频控制领域得到了广泛应用。