Unified Constant-Frequency Integration Control of Three-Phase Standard Bridge Bo

Unified Constant-Frequency Integration Control of Three-Phase Standard Bridge Boost Rectifiers With Power-Factor Correction
Abstract—In this paper, a three-phase six-switch standard
boost rectifier with unity-power-factor correction is investi-
gated. A general equation is derived that relates the input phase
voltages, output dc voltage, and duty ratios of the switches in
continuous conduction mode. Based on one of the solutions and
using one-cycle control, a unified constant-frequency integration
controller for PFC is proposed. For the standard bridge boost
rectifier, a unity power factor and low total hARMonic distortion
canberealizedinallthreephaseswithasimplecircuitthatiscom-
posed of one integrator with reset along with several flips-flops,
comparators, and some logic and linear components. It does not
require multipliers and three-phase voltage sensors, which are
requiredinmanyothercontrolapproaches.Inaddition,itemploys
constant-switching-frequency modulation that is desirable for
industrial applications. The proposed control approach is simple
and reliable. All findings are supported by experiments.
Index Terms—One-cycle control, power-factor correction
(PFC), power quality control, three-phase rectifier.

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