This article presents the analysis and demonstration of sensorless position estimation methodologies for separately excited synchronous electrostatic machines (SEMs). The torque density of the SEM comes at the cost of a high pole count (p >50) along with other enhancements. The high pole count makes the use of high-resolution position sensors necessary, driving up the cost of the system. The sensorless estimation of rotor position is seen as a solution for alleviating the need for high-resolution and high-cost position sensors. Key features of electrostatic machines that make them suitable for sensorless operation are identified. Back MMF (current) based rotor position sensing for medium to high speeds is investigated. High-frequency injection-based position estimation is investigated for zero and low-speed operating regions. The proposed methods are experimentally demonstrated using a current-source inverter-based drive platform.

中文翻译：

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他励同步静电机的无传感器控制


本文介绍了他励同步静电机 (SEM) 的无传感器位置估计方法的分析和演示。 SEM 的扭矩密度是以高极数 (p >50) 以及其他增强功能为代价的。高极数使得必须使用高分辨率位置传感器，从而增加了系统的成本。转子位置的无传感器估计被视为缓解对高分辨率和高成本位置传感器的需求的解决方案。确定了静电机器适合无传感器操作的关键特征。研究了基于反向 MMF（电流）的中高速转子位置传感。针对零速和低速运行区域研究了基于高频注入的位置估计。使用基于电流源逆变器的驱动平台对所提出的方法进行了实验演示。