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http://dx.doi.org/10.5370/KIEE.2013.62.3.355

Input AC Voltage Sensorless Control for a Three-Phase Z-Source PWM Rectifier  

Han, Keun-Woo (Dept. of Electrical Engineering, Chonnam National University)
Jung, Young-Gook (Dept. of Electrical Engineering, Daebul University)
Lim, Young-Cheol (Dept. of Electrical Engineering, Chonnam National University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.62, no.3, 2013 , pp. 355-364 More about this Journal
Abstract
Respect to the input AC voltage and output DC voltage, conventional three-phase PWM rectifier is classified as the voltage type rectifier with boost capability and the current type rectifier voltage with buck capability. Conventional PWM rectifier can not at the same time the boost and buck capability and its bridge is weak in the shoot- through state. These problems can be solved by Z-source PWM rectifier which has all characteristic of voltage and current type PWM rectifier. By shoot-through duty ratio control, the Z-source PWM rectifier can buck and boost at the same time, also, there is no need to consider the dead time. This paper proposes the input AC voltage sensorless control method of a three-phase Z-source PWM rectifier in order to accomplish the unity input power factor and output DC voltage control. The proposed method is estimated the input AC voltage by using input AC current and output DC voltage, hence, the sensor for the input AC voltage detection is no needed. comparison of the estimated and detected input AC voltage, estimated phase angle of the input voltage, the output DC voltage response for reference value, unity power factor, FFT(Fast Fourier Transform) of the estimated voltage and efficiency are verified by PSIM simulation.
Keywords
Z-source PWM rectifier; Modified space vector modulation; Input AC voltage sensorless control; Modulation index; Unity input power factor; Output DC voltage control;
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Times Cited By KSCI : 1  (Citation Analysis)
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