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http://dx.doi.org/10.7471/ikeee.2018.22.2.258

Soft Start-up Algorithm of Single-Phase Induction Motor Based on Full-bridge Inverter  

Kim, Tae-Seong (Dept. of Electrical Engineering, Kyungnam University)
Kang, Hyung-Do (Dept. of Electrical Engineering, Kyungnam University)
Hwang, Seon-Hwan (Dept. of Electrical Engineering, Kyungnam University)
Publication Information
Journal of IKEEE / v.22, no.2, 2018 , pp. 258-265 More about this Journal
Abstract
This paper proposes an algorithm for reducing the starting current when the single-phase induction motor starts and analyzes its operation. Generally, the single-phase induction motors require several starters to generate the starting torque due to their structural characteristics. In this paper, a capacitor-start / capacitor-run method of the single-phase induction motor is basically adopted. This conventional method is efficient and has a large starting torque, but it generates about 5 ~ 6 times of inrush current at startup. As a result, the freezer starting device and peripheral devices are damaged and life time may be reduced. To reduce the inrush current, the current control algorithm based on the virtual dq model is presented to control the starting current. In addition, it validates the proposed algorithm through experiments to smooth transit from start-up operation to the rated operating region.
Keywords
Single-phase induction motor; Soft start-up algorithm; Virtual dq-based current controller; Operation transition; Capacitor-start/capacitor-run;
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