An Overview of Position Sensorless Techniques for Switched Reluctance Machine Systems

Abstract

Accurate real-time rotor position is indispensable for switched reluctance motors (SRM) speed and torque control. Traditional position sensors add complexity and potential failure risk to the system. Owing to the added advantages of high stability and low cost, the position sensorless method of SRMs has been extensively studied to advance its use in vehicles and construction machinery. This paper presents an overview of position sensorless control techniques from the perspective of whether the method requires the establishment of complex mathematical models. Various types of methods are compared for performance, such as speed regulation range, algorithm complexity, and requirement of the pre-stored parameter. A discussion is presented concerning current trends in technological development, which will facilitate the research addressing potentially effective methods for position estimation in SRM drive systems.

The Study of SRM Sensorless Control Strategy Based on SOGI-FLL and ADRC-PLL Hybrid Algorithm

“…However, employing such a methodology results in an increase in both the dimensions and costs associated with the speed control system, which may possibly undermine its reliability in challenging settings [6]. As a result, the investigation of position sensorless technology for SRMs is of utmost significance [7,8].…”

“…Scholars have extensively studied the position sensorless technology of SRMs and proposed various control strategies. The control schemes that are currently available can be divided into several groups [8], including the high-frequency pulse injection method [9,10], the magnetic linkage/current method [11][12][13], the model of inductance method [14,15], and the intelligent control method [16][17][18]. The high-frequency pulse injection method has been widely used during the start-up and low-speed operation phases.…”