An Improved MTPA Control Based on Amplitude-Adjustable Square Wave Injection
An Improved MTPA Control Based on Amplitude-Adjustable Square Wave Injection
复制标题
基于可调幅方波注入的改进MTPA控制
DOI：
10.1109/tec.2020.2968737
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发表时间：
2020-06
影响因子：
4.9
通讯作者：
Wang Huijun
中科院分区：
文献类型：
--
作者：
Zhou Xinxiu;Zhou Yongping;Wang Huijun
传统的基于信号注入的最大转矩/安培（MTPA）方法采用固定的波形幅值和固定的积分系数，在变工况下，特别是重载工况下，最优电流角跟踪性能下降。针对这一问题，提出了一种基于幅度可调方波注入的改进MTPA方法。首先，分析了最佳电流角、方波振幅和电磁转矩之间的关系。分析结果表明，当采用固定波幅值时，负载转矩增大，电流角的波动增大。基于此关系，提出了一种幅度可调的方波虚拟信号注入MTPA方法。通过根据负载转矩调节方波幅度，与传统方法相比，在重负载下可以减小所获得的电流角的稳态波动。同时，为了改善MTPA在负载变化条件下的动态响应，提出了一种自适应模糊控制方法来调整积分系数。最后通过实验验证了改进MTPA方法的有效性。
In traditional maximum torque per ampere (MTPA) method based on signal injection, fixed wave amplitude and constant integral coefficient are employed, which actually degrade the optimal current angle tracking performance in variable conditions, especially under heavy loads. In order to solve this problem, an improved MTPA method based on amplitude-adjustable square wave injection is proposed. First, the relationships among optimal current angle, square wave amplitude and electromagnetic torque are analyzed. The analysis results indicate that if fixed wave amplitude is adopted, the fluctuations in the obtained current angle increases when load torque rises. Based on this relationship, an amplitude-adjustable square wave virtual signal injection MTPA method is proposed. By adjusting square wave amplitude according to the load torque, steady-state fluctuations of the obtained current angle can be reduced compared to conventional method under heavy loads. Meanwhile, to improve the MTPA dynamic response under load change conditions, an adaptive fuzzy control method is proposed for adjusting integral coefficient. Finally, the validity of the improved MTPA method is verified through experimental results.
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