Scheme based on buck-converter with three-phase H-bridge combinations for high-speed BLDC motors in aerospace applications

作者：Feng, Jian^*; Liu, Kun; Wang, Qing

来源：IET Electric Power Applications, 2018, 12(3): 405-414.

DOI：10.1049/iet-epa.2017.0615

• brushless DC motors
• position control
• sensorless machine control
• power convertors
• invertors
• reliability
• DC motor drives
• angular velocity control
• control system synthesis
• fault tolerant control
• buck-converter
• three-phase H-bridge combinations
• high-speed BLDC motors
• aerospace application
• high-reliable inverter scheme
• high-accurate commutation instant shift correction method
• high-speed brushless direct current motors
• three-phase inverter
• BLDC motor drive system

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.

• 出版日期2018-3
• 单位中国人民解放军国防科学技术大学