集成Z源升压驱动的开关磁阻电机容错直接瞬时转矩控制

转矩脉动是限制开关磁阻电机广泛应用的关键问题，转矩脉动抑制技术也一直是该类电机研究的热点和难点。本项目深入分析了开关磁阻电机转矩脉动抑制困难的技术瓶颈，通过追溯转矩脉动抑制、功率变换及容错、无位置传感器起动之间的共性和特性关系，从升压容错功率拓扑集成和无位置起动控制的角度探究全速范围内具备容错能力的转矩脉动综合控制方法。创新思路为：在直接瞬时转矩控制的转矩跟踪优化基础上，通过功率系统集成引入具有宽范围升压功能的不对称Γ-Z源变换器，实现母线升压、故障容错和直接瞬时转矩控制的多维度协同控制。此外，针对Z源升压和直接瞬时转矩控制对相电流波形以及脉冲注入的影响，研究基于集成功率拓扑的无位置低速连续位置估计方法，解决低速连续位置检测困难而使得转矩脉动抑制控制受限的问题。本项目的实施，将进一步提升开关磁阻电机系统的转矩脉动抑制和容错能力，对于有效拓宽其在诸多受限领域的应用具有重要的理论和现实意义。

Torque ripple is the key problem to restrict the wide application of switched reluctance motors， and the torque ripple elimination techniques have always been the hotspots and difficulties in the research of this kind of motors. This project deeply analyzes the technical bottleneck of torque ripple elimination in SRM. By tracing the commonness and characteristic relationship among torque ripple elimination, power conversion, fault-tolerant control and sensorless starting of switched reluctance motors, the project explores the comprehensive control method of fault-tolerant torque ripple elimination technologies in full speed range from the perspective of boost fault-tolerant power topology integration and sensorless starting control. The innovative ideas are as follows: On the basis of the torque tracking strategy optimization of the direct instantaneous torque control, an asymmetric Γ-Z source converter with wide range boost function is introduced through power topology system integration to realize multi-dimensional cooperative control of bus voltage boosting, fault tolerance and direct instantaneous torque control. In addition, considering the influence of Z-source boost and direct instantaneous torque control on phase current waveform and pulse injection, a sensorless low-speed continuous position estimation method based on the integrated drive topology is studied to solve the problem of the limitations of torque ripple control due to the difficulty of continuous position detection in low-speed operation. The implementation of this project can further improve the torque ripple elimination and fault tolerance capability of the SRM system, which has important theoretical and practical significance for effectively broadening the application of switched reluctance motor in many restricted fields.