Design and Realization of Maximum Boost Switched Inductor Z-Source Inverter for Three Phase On-Line UPS

K. Chitra(1*), A. Jeevanandham(2), Nimitha Ashok(3)

(1) EEE department, Bannari Amman Institute of Technology, India
(2) Professor in EEE department, Bannari Amman Institute of Technology, India
(3) M.E degree in Power Electronics and Drives from Anna University, India
(*) Corresponding author


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Abstract


This paper proposes switched inductor Z-source inverter (SL-ZSI) for three phase on-line UPS with high voltage boost ability. The maximum boost control is attained using third harmonic injection. The proposed inverter employs a unique impedance network to couple the main circuit and the power source. SL-ZSI adds two inductors and six diodes to enlarge voltage adjustability. To obtain a high voltage conversion ratio it needs only a shoot through state. SL-ZSI concept can be applied to all dc- to –ac, ac-to-dc, ac-to-ac, and dc-to-dc power conversion. The proposed method is simulated using MATLAB/Simulink and the result satisfies the theoretical analysis
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Keywords


Boost Factor; Maximum Boost PWM; Switched Inductor ZSI; ZSI; On-Line UPS

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