Abstract
AbstractA new control scheme for the single‐phase rectifier with three‐level voltage pattern is proposed. A power‐factor corrector to improve the power quality is presented. A hysteresis current control (HCC) is adopted to control the line current with high power factor and low harmonic distortion. The line current command is derived from a DC link voltage regulator and an output power estimator. The major advantage of using three‐level instead of two‐level voltage pattern is that the blocking voltage of each power device is clamping to half of the DC link voltage. Based on the region detector of the line voltage, capacitor compensator and hysteresis comparator, the proposed control scheme is used to drive the line current with high power factor and low current distortion. The proposed scheme is verified by software simulations and experimental results from a laboratory prototype.
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