随着新能源汽车热管理系统对高效、紧凑、低成本电机控制需求的日益增长，电子水泵作为热管理核心执行器，正经历着从有刷到无刷、从有传感器到无传感器的技术迭代。文章系统性地提出并实现了一种基于英飞凌 TLE9877QX 芯片的 650 W 永磁同步电机无传感器磁场定向控制系统。该系统为汽车电子水泵等执行器电控领域提供了可复用、高可靠的技术范式，对其他类似控制器设计具有重要的工程参考价值。

With the increasing demand for high-efficiency, compact, and low-cost motor control in the thermal management systems of new energy vehicles, the electric water pump as a core thermal management actuator is undergoing a technological evolution from brushed to brushless and from sensored to sensorless. This paper systematically proposes and implements a 650 W permanent magnet synchronous motor sensorless Field-oriented Control (FOC) system based on the Infineon TLE9877QX chip. This system provides a reusable, highly reliable technical paradigm for the electronic control of automotive actuators such as electric water pumps, and holds significant engineering reference value for the design of other similar controllers.