An internal power angle control strategy for high-speed sensorless brushless DC motors  

作　　者：Bo TAN Xingyuan GUO Jun ZHAO Xiaofeng DING Wei FANG 

机构地区：[1]School of Electronic Information Engineering,Xi'an Technological University,Xi'an 71021,China [2]Marketing Service Center of State Grid,Hebei Electric Power Co.,Ltd,Shijiazhuang 050021,China [3]Xi'an Aviation Institute of Computing Technology,Aviation Industry Corporation of China,Xi'an 710065,China [4]School of Automation Science and Electrical Engineering,Beihang University,Bejing 100083,China [5]Chinese Flight Test Establishment,Xi'an 710089,China

出　　处：《Chinese Journal of Aeronautics》2022年第11期309-321,共13页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51877006);the Key R&D Program of Shaanxi Province,China(No.2021GY-340 and 2020GY-140);the Aeronautical Science Foundation of China(No.20181953020)。

摘　　要：High-speed Brushless DC Motors(BLDCMs)usually adopt a sensorless control strategy and operate in three-phase six-state drive mode.However,the sampling errors of the rotor position and the driving method increase the Internal Power Angle(IPA),resulting in a decrease in the efficiency of the system.Conventional IPA reduction strategies are either sensitive to motor parameters,or ignore diode freewheeling during the commutation process,or require additional current sensors.In this paper,a new strategy to reduce the IPA is proposed.Firstly,a Zero-Crossing Point(ZCP)detection method for the back-EMF without filter is proposed to reduce the sampling errors of the rotor position.Secondly,the relationship between the non-energized terminal voltage and the ZCP of the corresponding back-EMF is analyzed.The non-energized terminal voltage that has completed the diode freewheeling is divided into two triangles by half of the bus voltage.When the IPA is suppressed,the areas of the two triangles are equal.Thirdly,an advanced angle for reducing the IPA is obtained through a PI regulator which can eliminate the deviation between the two areas.Finally,both a simulation model and an experimental circuit are built to verify the proposed control strategy.

关 键 词：Back-EMF detection Brushless DC motors Commutation control Electric drive Internal power angle 

分 类 号：V272[航空宇航科学与技术—飞行器设计]