Type-3 PLL Based Speed Estimation Scheme for Sensorless Linear Induction Motor Drives

다국어 초록 (Multilingual Abstract)

The type-3 phase-locked loop (PLL) is a promising technique for synchronization in grid-connected application, which can offer the zero frequency/phase error when inputting ramp-change-frequency signal. Inspired from the idea of this technique, this paper proposes a new speed estimation scheme based on type-3 PLL for linear induction motor (LIM) speed-sensorless drive system. The basic contents about the type-3 PLL-based scheme are firstly presented. Since the harmonic components and amplitude mismatch lead to the performance degradation of the type-3 PLL-based scheme, some adjustments have been made to achieve the performance improvement of speed estimation. With the assistance of the small-signal model, the dynamic response of the type-3 PLL-based scheme is analyzed minutely. In addition, the comparison results with the conventional PLL-based scheme are included. The performance of the proposed scheme is verified through the experimental tests.

목차 (Table of Contents)

• Abstract
• I. INTRODUCTION
• II. ELECTROMOTIVE FORCE MODEL OF THE LIM
• III. TPYE-3 PLL BASED SPEED ESTIMATION SCHEME
• IV. EXPERIMENTAL RESULTS
• V. CONCLUSION
• REFERENCES