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논문 기본 정보

자료유형
학술대회자료
저자정보
Tae-Hoon Kim (Seoul National University) Dae-Young Yang (Seoul National University) Tae-Ho Oh (Seoul National University) Young-Seok Kim (Seoul National University) Sang-Hoon Lee (RS Automation) Dong-Il “Dan” Cho (Seoul National University)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2022
발행연도
2022.11
수록면
141 - 146 (6page)

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This paper presents a closed-loop stator flux control method for a soft starter to prevent speed oscillations. A soft starter controls starting current of an induction motor by gradually decreasing the firing angle. However, when the conventional firing angle control method is applied to the induction motor with a low inertia rotor and load, the stator flux magnitude rapidly increases as the rotor speed reaches the rated speed. This rapid increase in stator flux magnitude results in speed oscillations. To overcome the issues, in this paper, a stator flux magnitude closed-loop control method is proposed to prevent the rapid increases of the stator flux. First, the situation where speed oscillations can occur with low inertia is analyzed, using the torque-speed curve and the equations of the stator flux and rotor current in the transient state. Then, the closed-loop controller is designed by considering the relationship between the stator flux magnitude and the input voltage. The proposed stator flux control method allows the stator flux magnitude to increase at a moderate speed and prevents speed oscillation at start-up. The MATLAB/SIMULINK simulations using the model of a lightly loaded induction motor are performed and show the effectiveness of the proposed method.

목차

Abstract
1. INTRODUCTION
2. SPEED OSCILLATION ANALYSIS
3. CLOSED-LOOP STATOR FLUX CONTROL METHOD
4. SIMULATION RESULTS
5. CONCLUSION
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