The invention discloses a dead-zone-free three-phase AC /
DC converter with a high-frequency
rectifier bridge, belonging to the field of three-phase AC / DC
converters. The invention particularly relates to a dead-zone-free three-
phase converter topological structure, aiming at being applied to a medium-power and high-power occasions. The dead-zone-free three-phase AC /
DC converter reduces the current
harmonic content at an AC side and decreases the specification of a filter under the condition of adopting a
space vector control algorithm which is the same as that adopted by the traditional three-phase bridge-type converter and can realize bidirectional flow and natural switching of energy without extra switching loss. The dead-zone-free three-phase AC /
DC converter comprises a DC-side support
capacitor, a three-phase upper bridge arm power
transistor, a three-phase lower bridge arm power
transistor, a three-phase upper bridge arm
freewheel diode, a three-phase lower bridge arm
freewheel diode, a three-phase high-frequency
rectifier bridge, a three-phase first straight-through prevention filtering
inducer and a three-phase second straight-through prevention filtering
inducer. The dead-zone-free three-phase AC / DC converter solves the problems of straight-through problem of the bridge arm power
transistor of the traditional three-phase
voltage source bridge-type converter and the problems of the double
voltage reduction type converter which needs to shield redundant switching signals for reducing extra switch loss and
zero crossing point
distortion.