基于交轴磁场调节的漏磁通可控永磁同步电动机最小弱磁电流控制OA

To meet the requirements of high torque,wide speed range and high efficiency of drive motors in the field of electric vehicles,the weak magnetic current minimum speed control strategy based on cross axis magnetic field regulation was proposed with considering the characteristics of FLCPM motors with high speed,low magnetic flux and heavy load high magnetic flux.By utilizing the cross axis magnetic field to reconstruct the distribution of id and iq currents in weak magnetic control,the leakage flux of the permanent magnet was limited and indirectly controlled to achieve air gap flux control.In order to reduce the impact of leakage flux changes on current distribution calculation and demagnetization current calculation,the minimum is current weak magnetic constraint condition and online adjustment judgment were introduced,and the id and iq distribution quantities were optimized to improve the efficiency of weak magnetic operation.The iq current weak field control and minimum weak field current control experiments were conducted on the FLCPM motor,and the current magnitude,speed regulation characteristics and weak field efficiency characteristics were analyzed.The results show that the traditional id current weak field on FLCPM motors has excessive weak field,while the minimum weak field current control has smaller is current,wider speed range and higher weak field efficiency.The current is reduced by up to 2.83％,and the weak field efficiency can reach up to 91.0％.