基于电荷守恒法的永磁同步电机母线电流估算算法设计OA

Addressing the model complexity,high computational load,and strong parameter dependen-cy of existing busbar current estimation algorithms,a novel estimation method based on charge conser-vation principles was proposed.The charge conservation relationships during switching tube conduction in field-oriented control(FOC)were analyzed,and measurable parameters such as three-phase cur-rents and pulse-width modulation(PWM)duty cycle were utilized for busbar current estimation.Addi-tionally,a segmented dead-time compensation strategy was designed to compensate for zero-crossing and non-zero-crossing regions.Experimental results demonstrate that the proposed algorithm reduces phase current distortion from 5.08%to 2.03%,keeps the busbar current estimation errors below 5%,and significantly enhances the algorithm's accuracy and robustness.