Potentials and Limits of Reducing Switching Losses in Motor Drive Power Converters by using fast switching SiC Bipolar Junction Transistors

使用快速开关 SiC 双极结晶体管降低电机驱动电源转换器开关损耗的潜力和限制

• 批准号: 212735162
• 负责人: Professor Dr.-Ing. Wilfried Hofmann
• 金额: --
• 依托单位: Professur für Elektrische Maschinen und Antriebe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/212735162?language=en
• 关键词: Potentials; Limits; Reducing; Switching; Losses

The purpose of this project is to investigate what extent the switching losses in a power converter for motor drive by using fast switching silicon carbide bipolar junction transistors without damaging the inverter or the connected electrical machine. At first a driver configuration for the lowest possible converter losses needs to be found. Besides the conventional voltage source based driver a new current source is supposed to be used. In any case, passive switching actions that could lead to converter destruction have to be prevented by appropriate driver and commutation circuit design. Secondly, the sharpest tolerable voltage rise across the transistors is to be found, in order to connect an electrical motor via motor cable directly to the inverter without endangering the winding insulation. A major focus of this project is the precise measurement of switching losses of fast switching semiconductor devices by double pulse test in buck converter setting as well as the measurement of the overall converter losses by using power analyzer and calorimeter. For the determination of the inverter and overall converter losses the induction motor connected to the inverter is loaded by another machine that is torque controlled. Additionally the on-state losses are supposed to be measured, too. Especially the uncertainty of measurement of each measuring technique needs to be determined to evaluate the measuring results. Based on these investigations the measuring set-ups with the most precise measurement results are to be selected. Thus, the lowest converter losses with and without an output filter can be determined. If a sine-wave filter is applied, the correlation between pulse frequency and filter-space needs to be explored. In case there is not any output filter, the effect of voltage rise times under 50 ns on critical cable length should be examined. Furthermore switching losses, that have been calculated based on double pulse measurements are supposed to be set in correlation with measured switching losses of the converter.

该项目的目的是通过使用快速开关的碳化硅双极连接晶体管来研究电动机驱动器电动转换器中的开关损耗的程度，而不会损坏逆变器或连接的电机。首先，需要找到最低转换器损耗的驱动程序配置。除了常规的电压源驱动器外，还应使用新的电流源。在任何情况下，必须通过适当的驾驶员和换向电路设计来防止可能导致转换器破坏的被动切换动作。其次，要找到跨晶体管的最鲜耐力电压上升，以直接通过电机电缆将电动机直接连接到逆变器，而不会危害绕组绝缘。该项目的主要重点是通过使用Power Analyzer和CalOrimeter使用Double Pulse测试，通过双脉冲转换器设置中的双脉冲测试以及对整体转换器损耗的测量来确切测量快速开关半导体设备的开关损耗。为了确定逆变器和整体转换器损耗，连接到逆变器的感应电动机由另一台扭矩控制的机器加载。另外，国家损失也应该衡量。特别是需要确定每种测量技术的测量的不确定性以评估测量结果。基于这些研究，将选择具有最精确测量结果的测量设置。因此，可以确定有或没有输出过滤器的最低转换器损耗。如果应用正弦波滤波器，则需要探索脉冲频率和滤波器空间之间的相关性。如果没有任何输出过滤器，则应检查低于50 ns的电压上升时间对临界电缆长度的影响。此外，基于双重脉冲测量值已经计算的切换损耗应该与测量的转换器的开关损耗相关。

项目成果

Decrease of SiC-BJT driver losses by one-step commutation

通过一步换相减少 SiC-BJT 驱动器损耗

• DOI: 10.1109/ipec.2014.6870090
• 发表时间: 2014
• 期刊: 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)
• 作者: Hofmann

Efficiency increase of SiC-BJT inverter by driver loss reduction with one-step commutation

• DOI: 10.1109/ispsd.2014.6856019
• 发表时间: 2014-06
• 期刊: 2014 IEEE 26th International Symposium on Power Semiconductor Devices & IC's (ISPSD)
• 作者: Henry Barth;W. Hofmann