International Journals Samer Saleh Hakami, Laith M. Halabi, and Kyo-Beum Lee, "Dual-Carrier-Based PWM Method for DC-Link Capacitor Lifetime Extension in Three-Level Hybrid ANPC Inverters," IEEE Transactions on Industrial Electronics, vol. 70, no. 4, pp. 3303-3314, Apr. 2023. -SCI
2023
본문
Power converters operate at varying low, medium, and high voltage levels. Large electrolytic capacitors are usually used to sustain the associated
DC-link current and stabilize the DC-link voltage. However, owing to different power converter applications, capacitors are affected by large ripples in
the DC-link current, which increase heat exchange and reduce system reliability and lifespan. In this regard, this study proposes an innovative control
technique for suppressing the ripple in the DC-link current and common-mode voltage. The proposed control technique uses an improved dual-carrier-based pulse width modulation (PWM) technique to create a new switching scheme by selecting the voltage vectors that contribute to the smallest
ripples in the DC-link current according to each sector. Applying the proposed control technique significantly reduces the ripples in the DC-link current and common-mode voltage, which increases the reliability of the system and extends the lifetime of DC-link capacitors. The simulation and
experimental results demonstrate the effectiveness of the proposed control strategy.
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