The papers in this special section focus on position sensorless AC motor drives. Rotor position and speed information is crucial for highperformance ac machine drives. Since the merits, such as cost reduction, system downsizing, and reliability enhancement can be achieved through position sensorless (also noted as self-sensing) control, many techniques for a wide range of rotor speed from standstill to high speed have been developed in the last few decades. Sensorless control techniques have been commercialized and widely used in industrial applications. However, there are still a large number of unresolved issues, which limit the applications of sensorless ac motor drives. The extreme speed sensorless control is still a big challenge. Besides, the robustness of the position estimation scheme against timevarying parameters, inverter nonlinearities, multisaliency, etc., also aggravate the control performance in some applications. This Special Section on “Position Sensorless AC Motor Drives” in the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS provides an insight into some of the newly emerging challenges and potential solutions to overcome those aforementioned issues. It will be timely and of great interest for all those working in this area and, of course, for industry.

中文翻译：

---

客座社论：无位置传感器交流电机驱动器


本专题部分的论文重点关注无位置传感器交流电机驱动器。转子位置和速度信息对于高性能交流机器驱动器至关重要。由于通过无位置传感器（也称为自感应）控制可以实现降低成本、缩小系统尺寸和增强可靠性等优点，因此在从静止到高速的广泛转子速度范围内已经开发了许多技术。过去几十年。无传感器控制技术已经商业化并广泛应用于工业应用。然而，仍然存在大量未解决的问题，限制了无传感器交流电机驱动器的应用。极速无传感器控制仍然是一个巨大的挑战。此外，位置估计方案对时变参数、逆变器非线性、多重显着性等的鲁棒性也会恶化某些应用中的控制性能。 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 中有关“无位置传感器交流电机驱动器”的特别章节深入介绍了一些新出现的挑战以及克服上述问题的潜在解决方案。对于所有在该领域工作的人来说，当然还有工业界，这将是及时的和极大的兴趣。