【目的】为提升内置式永磁同步电机(IPMSM)在弱磁工况下的动态响应性能和稳定性，解决传统弱磁控制策略在高速运行时存在的电流轨迹偏离以及电压饱和问题，提出了一种改进的IPMSM弱磁控制策略。【方法】首先，基于IPMSM数学模型分析了传统负d轴电流补偿策略的电流轨迹，发现电流矢量旋转变换会导致输出转矩发生变化，因此提出了一种增加q轴电流补偿的改进弱磁控制策略，通过引入q轴电流补偿分量来抵消转矩波动，从而改善电流轨迹并提升转矩输出的稳定性。其次，针对负载突变工况，分析了电压饱和现象的产生机理，提出了一种优先供给d轴电压的抗电压饱和策略，通过动态调整电压分配优先级，确保d轴电压供给充足，从而避免电压饱和导致的电流失控现象，进一步增强了系统的稳定性和可靠性。【结果】为验证所提策略的有效性，搭建了IPMSM试验平台进行对比测试。试验结果表明，采用改进的弱磁控制策略后，IPMSM在弱磁区的电流轨迹得到了显著改善，输出转矩稳定性得以提升，系统的动态响应性能也得以提升。抗电压饱和策略有效避免了因电压饱和而导致的电流失控现象，保证了系统的稳定运行。【结论】本文提出的改进弱磁控制策略通过增加q轴电流补偿和优先供给d轴电压，有效解决了传统弱磁控制策略在高速运行时的电流轨迹偏离和电压饱和问题。试验结果表明，本文所提方法能够显著改善IPMSM在弱磁工况下的电流轨迹特性，提升系统的动态响应性能，增强系统的抗干扰能力，为IPMSM在电动汽车、高速机床等领域的应用提供了可靠的技术支持。

[Objective] To enhance the dynamic response performance and stability of interior permanent magnet synchronous motor (IPMSM) under flux-weakening conditions, and to address issues of current trajectory deviation and voltage saturation in traditional flux-weakening control strategies during high-speed operation, an improved flux-weakening control strategy for IPMSM is proposed. [Methods] Firstly, based on the mathematical model of IPMSM, the current trajectory of the traditional negative d-axis current compensation strategy was analyzed. It was observed that the current vector rotation transformation caused variations in output torque. Therefore, an improved flux-weakening control strategy was proposed, incorporating q-axis current compensation to offset torque fluctuations, thereby optimizing current trajectories and improving torque output stability. Secondly, for sudden load change conditions, the mechanism of voltage saturation was analyzed, and an anti-voltage saturation strategy prioritizing d-axis voltage supply was proposed. By dynamically adjusting the voltage distribution priority to ensure sufficient d-axis voltage supply, this strategy avoided current loss of control caused by voltage saturation, further enhancing system stability and reliability. [Results] To verify the effectiveness of the proposed strategy, an IPMSM experimental platform was established for comparative testing. The experimental results showed that, after the implementation of the improved flux-weakening control strategy, the current trajectory in the flux-weakening region of the IPMSM was significantly improved, the torque output stability was enhanced, and the system's dynamic response performance was improved. The anti-voltage saturation strategy effectively prevented current loss of control caused by voltage saturation, ensuring stable system operation. [Conclusion] The improved flux-weakening control strategy proposed in this study, by incorporating q-axis current compensation and prioritizing d-axis voltage supply, effectively addresses the issues of current trajectory deviation and voltage saturation in traditional flux-weakening control strategies during high-speed operation. Experimental results demonstrate that the proposed method can significantly enhance the current trajectory characteristics of IPMSM under flux-weakening conditions, improve the dynamic response performance of the system, and strengthen the anti-interference capability of the system, providing reliable technical support for the application of IPMSM in fields such as electric vehicles and high-speed machine tools.