Abstract

This paper proposes novel switched reluctance (SR) inverter for four-phase SR drive which generates high output torque without compromise in efficiency for medium and high speed operations. In proposed SR inverter drive, the recovered energy of phase windings circulates with help of two boost capacitors. The circulation of energy between two alternate working phase winding provides charging of boost capacitors without phase current overlapping. The de-energization of phase windings makes either of boost capacitor and dc-bus voltage in series. Thus, the phase windings are de-energized with twice negative dc-bus voltage during entire process until SR drive working under absolute torque region. The de-energizing current reduces to zero at faster rate, and therefore proposed SR inverter drive operates at high dwell time as well as utilization of effective torque region. So, the extension of constant torque range generates high output torque without compromise in efficiency. It requires two less no. of IGBTs and additional two capacitors and four diodes as compare to conventional SR inverter. The analysis of working states is presented. The high output torque of proposed SR inverter drive without compromise in efficiency is justified from comparison of both simulation and experimental results with conventional SR inverter drive.

摘要

本文提出了一种用于四相 SR 驱动器的新型开关磁阻 (SR) 逆变器，该逆变器可在不影响中高速运行的效率的情况下产生高输出扭矩。在建议的 SR 逆变器驱动中，相绕组的回收能量在两个升压电容器的帮助下循环。两个交替工作相绕组之间的能量循环提供升压电容器充电，而不会出现相电流重叠。相绕组断电使升压电容器和直流母线电压串联。因此，在整个过程中，相绕组以两倍的负直流母线电压断电，直到 SR 驱动器在绝对扭矩区域下工作。断电电流以更快的速度减小到零，因此，建议的 SR 逆变器驱动器在高停留时间以及有效扭矩区域的利用下运行。因此，恒转矩范围的扩展可在不影响效率的情况下产生高输出转矩。它需要少两个没有。与传统 SR 逆变器相比，IGBT 和额外的两个电容器和四个二极管。给出了工作状态的分析。将模拟和实验结果与传统 SR 逆变器驱动进行比较，证明了所提出的 SR 逆变器驱动器的高输出扭矩而不影响效率。给出了工作状态的分析。将模拟和实验结果与传统 SR 逆变器驱动进行比较，证明了所提出的 SR 逆变器驱动器的高输出扭矩而不影响效率。给出了工作状态的分析。将模拟和实验结果与传统 SR 逆变器驱动进行比较，证明了所提出的 SR 逆变器驱动器的高输出扭矩而不影响效率。