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http://dx.doi.org/10.7471/ikeee.2020.24.3.867

Neutral-Point Voltage Ripple Reduction of High Frequency Injection Sensorless Control of IPMSM Fed by a Three-Level Inverter  

Cho, Dae-Hyun (Dept. of Electrical and Computer Engineering, Ajou University)
Kim, Seok-Min (LS Electric Co., Ltd.)
Lee, Kyo-Beum (Dept. of Electrical and Computer Engineering, Ajou University)
Publication Information
Journal of IKEEE / v.24, no.3, 2020 , pp. 867-876 More about this Journal
Abstract
This paper proposes a neutral-point voltage ripple reduction of high frequency injection sensorless control of IPMSM fed by a three-level inverter. The high frequency voltage injection method has been successfully applied to sensorless control for IPMSM at low speed region. In the process of high frequency voltage injection sensorless control for IPMSM, the neutral-point voltage ripple is increased. It should be reduced because it distorts the output current and decreases a life time of DC-link capacitor. The proposed method in this paper reduces the neutral-point voltage ripple by compensating the reference voltage, and the compensation value is calculated simply with reference voltages and currents. The effectiveness of the proposed method is verified by simulation results.
Keywords
Interior permanent-magnet synchronous motor; Sensorless control; High frequency voltage injection; Neutral-point clamped inverter; Neutral-point voltage ripple;
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Times Cited By KSCI : 7  (Citation Analysis)
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