Low-Torque-Ripple Sensorless Control of Mutually Coupled Switched Reluctance Machines (MCSRMs)

该研究将通过设计一种新的互耦开关磁阻电机控制方案来推动电机驱动技术的发展。这种机器对于满足电气化运输、工业应用和家用电器中对高性价比、高可靠性和高效率的电机驱动系统日益增长的需求非常重要。虽然感应式和永磁同步电机目前在市场上占据主导地位，但由于价格飙升和稀土材料的迅速消耗，美国和世界各地的研究人员正在寻找不含稀土的替代品。开关磁阻电机就属于这一类。由于其结构简单刚性、容错能力强、扩展速度恒功率范围等优点，越来越受欢迎。然而，传统的开关磁阻电机存在高转矩波动、噪声、振动和非对称桥式功率变换器等问题。互耦开关磁阻电机是本研究的重点，其性能优于传统的开关磁阻电机，因为它们可以由标准的六开关变换器驱动。提出的研究将解决这些技术挑战，阻碍互耦开关磁阻电机的广泛应用。这项工作将极大地推动电力电子和电机驱动技术的研究，并将促进研究、教学、培训和学习。该研究将整合到电力工程本科和研究生课程中，以培养未来的工程师，使他们具备满足行业新需求的技能和知识。提出的研究目标是开发一种新的控制方案，用于相互耦合的开关磁阻电机，使用标准的六开关变换器来最小化转矩波动并实现无位置传感器控制。将追求三个具体目标：(1)通过使用两级电流剖面方案减少转矩波动。(2)实现无位置传感器控制。(3)采用六开关标准变换器开发低转矩纹波无传感器控制。通过克服高转矩波动和无传感器控制的关键障碍，实现本研究的目标将使互耦开关磁阻电机发展成为下一代无稀土电机。迄今为止，互耦开关磁阻电机的建模起源于传统的开关磁阻电机；然而，由于独特的扭矩产生机制，这种建模方法将使控制系统的开发复杂化。本工作还将研究互耦开关磁阻电机的非线性模型，并将非线性模型集成到两级转矩纹波减小方案和无位置传感器控制的设计中，从而弥合互耦开关磁阻电机建模和控制之间的差距。此外，将使用六开关标准转换器来取代非对称桥式转换器，以提高成本效益并改善其在电气化运输，工业应用和家用电器中的适用性。

The proposed research will advance motor drive technologies by designing a novel control scheme for mutually coupled switched reluctance machines. Such machines are of great importance to satisfy the increasing demand for cost-effective, highly reliable and efficient motor drive systems in electrified transportation, industrial applications, and home appliances. Although induction and permanent magnet synchronous machines are currently dominating the market, due to the soaring prices and rapid depletion of rare-earth materials, researchers in the U.S. and world-wide are searching for rare-earth-free alternatives. Switched reluctance machines belong to the group of such alternatives. They are increasing in popularity due to their simple and rigid structure, fault-tolerant capability, and extended-speed constant-power range. However, conventional switched reluctance machines suffer from high torque ripples, acoustic noise, vibration, and non-standard asymmetric bridge power converters. Mutually coupled switched reluctance machines that are the focus of the proposed research are outperforming conventional switched reluctance machines as they can be driven by a standard six-switch converter. The proposed research will address these technical challenges impeding the widespread utilization of mutually coupled switched reluctance machines. The work will greatly advance the research in power electronics and motor drive technology and will promote research, teaching, training, and learning. The research will be integrated into the undergraduate and graduate electric power engineering curriculum to educate future engineers who will have the skills and knowledge to meet the emerging needs of the industry.The goal of the proposed research is to develop a novel control scheme for mutually coupled switched reluctance machines using a standard six-switch converter to minimize torque ripples and enable position sensorless control. Three specific objectives will be pursued: (1) Reduce torque ripples through the use of a two-stage current profiling scheme. (2) Attain position sensorless control. (3) Use a six-switch standard converter to develop a low-torque-ripple sensorless control. Accomplishing the objectives of the proposed research will develop mutually coupled switched reluctance machines into the next generation of rare-earth-free electric machines by overcoming key obstacles high torque ripples and non-sensorless control. To date, the modeling of mutually coupled switched reluctance machines has originated from conventional switched reluctance machines; however, due to the unique torque production mechanism, this modeling approach will complicate control system developments. This work will also investigate nonlinear models of mutually coupled switched reluctance machines and integrate nonlinear models into the design of the two-stage torque ripple reduction scheme and position sensorless control, thereby bridging the gap between the modeling and control in the field of mutually coupled switched reluctance machines. In addition, a six-switch standard converter will be used to replace the asymmetric bridge converter to increase cost effectiveness and improve its suitability in electrified transportation, industrial applications, and home appliances.