Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Speed Ripple Based Mechanical Angle Estimation Schemefor Smooth Stop Control of Reciprocating Compressor
Authors Kwang-Woon Lee
DOI 10.6113/TKPE.2021.26.4.298
Page pp.298-301
ISSN 1229-2214
Keywords Mechancial angle estimator; Sensorless controlled PMSM; Silent stoppage; Reciprocating compressor
Abstract A mechanical angle estimator is presented in this study to achieve the sensorless control of permanent magnet synchronous motor (PMSM) used in driving a reciprocating compressor. Braking the PMSM at a specific mechanical angular position is critical for the silent stoppage of the reciprocating compressor. The performance of conventional mechanical angle observers used in reciprocating compressor drives can be seriously affected according to gains of the speed controller because such observers rely on the magnitude of current ripples. A speed ripple-based mechanical angle estimator is proposed to solve this problem. Experimental results showed the effectiveness of the proposed method.