【摘要】 新能源汽车电驱系统通常使用旋转变压器获取电机转子位置，但其电路复杂且芯片昂贵，成本昂贵。传统二阶锁相环在对转子加速跟踪时存在稳态误差，实际工况中常有输入的正余弦一相丢失导致软解码发生旋变故障。对此提出一种基于三阶角度观测器的角度观测器来提高位置解码精度，同时采用锁相环算法跟踪解码故障时的剩余信号，恢复丢失信号完成故障后的解码。最后通过MATLAB仿真证明了算法的可行性和有效性。采用英飞凌TC387的DSADC模块进行实际实验验证解码效果，结果表明该系统对加速度达到稳定跟踪，同时在某相信号缺失后可保持良好的解码效果。更多还原

【Abstract】 The electric drive system of new energy vehicles usually uses a resolver to obtain the position of the motor rotor, but its circuit is complex and the chips are expensive, resulting in high costs. The traditional second-order phase-locked loop has steady-state errors when accelerating and tracking the rotor. In actual working conditions, the loss of one phase of the input sine and cosine often leads to resolver faults in the soft ware decoding. For this, an angle observer based on the third-order Angle observer is proposed to improve the position decoding accuracy. Meanwhile, the phase-locked loop algorithm was adopted to track the remaining signal during the decoding fault and recover the lost signal to complete the decoding after the fault. Finally, the feasibility and effectiveness of the algorithm were proved through MATLAB simulation. The DSADC module of Infineon TC387 was adopted for actual verification of the decoding effect. The results show that the system achieves stable tracking of acceleration and can maintain a good decoding effect after the absence of a certain signal.更多还原