Abstract
A three-phase switch-mode rectifier (SMR) suitable for three-wire Y-connected sources with an unaccessible neutral is proposed in this paper. Each phase current is split into two line currents. By controlling the line currents to be sinusoidal and in-phase with the corresponding line-to-line voltages, unity input power factor for each phase can be obtained. The access of the neutral for command reference is no longer required. Only three active switches are utilized. Also there is no need to insert the dead times for preventing the simultaneous conduction of the switches. Simulations and experiments on a prototype show satisfactory results.
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