中国电机工程学报2017，Vol.37Issue(17)：5153-5161,9.DOI:10.13334/j.0258-8013.pcsee.161856
Z源逆变器驱动的无位置传感器无刷直流电机反电势过零点检测方法
Zero-Crossing Point Detection of Back EMF for Z-source Inverter Fed Sensorless Brushless DC Motor
摘要
Abstract
Based on the Z-source inverter,this paper proposed a novel zero-crossing point (ZCP) detection approach of back EMF for Z-source inverter fed sensorless brushless DC motor.By the single channel voltage comparator,the proposed approach compares virtual neutral point voltage with input neutral point voltage during the shoot-through vectors.The proposed approach dedicates zero-vectors and active-vectors to speed regulation,thus gets a wide operation range.The virtual neutral point voltages were analyzed,and the input neutral point voltage was preferred as the reference level of the comparator to reduce errors caused by voltage drops of the power devices.During the shoot-through vectors,both the virtual neutral point voltage and input neutral point voltage do not contain the component of DC supply voltage,so the signal-noise ratio of the detection will not be affected by the voltage attenuation.Moreover,the DC voltage utilization can be improved by the Z-source inverter,and the safety of the drive system can also be improved.The experimental results verify the correctness of the theories and the effectiveness of the proposed approach.关键词
Z源逆变器/无刷直流电机/反电势/过零点检测/无位置传感器Key words
Z-source inverter/brushless DC motor/back EMF/zero-crossing point detection/sensorless分类
信息技术与安全科学引用本文复制引用
李新旻,夏长亮,陈炜,谷鑫,史婷娜..Z源逆变器驱动的无位置传感器无刷直流电机反电势过零点检测方法[J].中国电机工程学报,2017,37(17):5153-5161,9.基金项目
国家重点基础研究发展计划项目(973计划)(2013CB035600) （973计划）
国家自然科学基金项目(51577126).The National Key Basic Research Program of China (973 Program)(2013CB035600) （51577126）
The National Natural Science Foundation of China(51577126). （51577126）
