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Improvement of Output Voltage Waveforms by DC-Link Neutral Point Voltage Estimation for FSTPI  

Kim, Jung-Hun (두원중공업)
Jo, In-Cheol (울산대학교 공대 전기전자정보시스템공학과)
Lee, Hong-Hee (울산대 전기전자정보시스템공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.58, no.9, 2009 , pp. 1741-1749 More about this Journal
Abstract
It is very important to maintain the balanced output voltage waveforms under the unbalanced DC-link voltages in the four-switch three-phase inverter(FSTPI). In this paper, the improvement of output voltage waveforms is proposed with the aid of DC-link voltage ripple estimation. The proposed method can be implemented without the additional voltage sensor. The proposed method applied to the permanent magnet synchronous motor (PMSM) is simulated and experimented in order to verify its feasibility.
Keywords
Four-Switch Three-Phase Inverter(FSTPl); Unbalanced Output; DC-link Voltage Ripple;
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