Scheme based on buck-converter with three-phase H-bridge combinations for high-speed BLDC motors in aerospace applications
Scheme based on buck-converter with three-phase H-bridge combinations for high-speed BLDC motors in aerospace applications
复制标题
基于降压转换器和三相 H 桥组合的方案，适用于航空航天应用中的高速 BLDC 电机
DOI：
10.1049/iet-epa.2017.0615
复制
发表时间：
2018-03-01
影响因子：
1.7
通讯作者：
Wang, Qing
中科院分区：
文献类型：
--
作者：
Feng, Jian;Liu, Kun;Wang, Qing
高可靠性和安全性对于航空航天应用至关重要。本研究介绍了一种基于三相 H 桥组合降压转换器的新型高可靠逆变器方案和高速无刷直流 (BLDC) 电机的高精度换向瞬时偏移校正方法。首先，分析了传统的三相逆变器和基于降压转换器的 BLDC 电机驱动系统。其次，设计了反电动势检测电路的过零点并分析了位置检测误差。第三，提出了一种提高检测频率和精度的速度测量方法。然后，基于独特的测速方法，设计了一种快速两级换相瞬时偏移补偿方法。特别是在高速稳态下实现高可靠、高精度换向，提高了调速精度，降低了电机驱动损耗。最后，提出了控制系统的设计流程，并提出了容错控制策略，以提高系统的可靠性。实验结果说明了所提出的逆变器方案和无位置传感器控制方法的有效性和实用性。
High reliability and safety are critical in aerospace applications. This study introduces a novel high-reliable inverter scheme based on buck-converter with three-phase H-bridge combinations and a high-accurate commutation instant shift correction method for high-speed brushless direct current (BLDC) motors. First, the traditional three-phase inverter and buck-converter-based BLDC motor drive system are analysed. Second, the zero-crossing points of back-electromotive force detection circuit are designed and the position detection error is analysed. Third, a speed measurement with enhanced detection frequency and accuracy is proposed. Then, a fast two-stage commutation instant shift compensation method is designed based on the unique speed measurement method. High-reliable and accurate commutations are achieved especially in the high-speed steady state, which improves the speed control precision and decreases the motor driving loss. Finally, the control system design process is proposed and a fault-tolerant-control strategy is presented to enhance the reliability of the system. Experimental results illustrate the effectiveness and practicability of the proposed inverter scheme and the position sensorless control method.