Single-phase three-level power factor correction rectifier based on asymmetric four-port

Abstract

Single-phase three-level power factor correction rectifier based on asymmetric four-port, including AC power supply, inductor L, switch tube Q 1 , Q 2 , Q 3 , Q 4 ; Diode D is connected to the AC side of the AC power supply 1 anode, diode D 2 The cathode, whose connection node constitutes terminal b; the other side of the AC power supply AC is connected to one end of the inductor L, and the other end of the inductor L is respectively connected to the switch tube Q 3 Source, switch tube Q 4 Drain, Diode D 10 Cathode, its connection node constitutes terminal a; switching tube Q 3 The drains are connected to the diode D 1 cathode, diode D 8 Anode, whose connecting node constitutes terminal c; off tube Q 4 The source is connected to the diode D respectively 2 anode, diode D 7 the cathode, whose connection node constitutes the terminal d; the diode D 8 Cathode connection capacitance C dc1 One end, the connecting node constitutes the terminal p; the capacitance C dc1 The other end is connected to the capacitor C dc2 One end, the connecting node constitutes the terminal n; the capacitor C dc2 The other end is connected to the diode D 7 Anodes, the nodes of which are connected constitute terminal m. The rectifier of the invention reduces the harmonic content of the rectifier and reduces the loss of components during the rectification process.

Description

technical field [0001] The invention relates to the technical field of single-phase electric energy conversion, in particular to a single-phase three-level power factor correction rectifier based on asymmetric four-ports. Background technique [0002] The development of industrial modernization urgently needs to seek a new power converter topology in power conversion, so as to reduce power loss and reduce hardware costs. In industrial applications, the acquisition of direct current is usually obtained by rectifying the alternating current of the power grid. During the rectification process, it is necessary to consider that the current cannot follow the voltage change. power factor. The main disadvantage of such a topological structure is that the number of components used increases, resulting in an increase in its loss, and such a topological structure is not suitable for larger power applications. Contents of the invention [0003] The invention provides a single-phase ...

AI Technical Summary

Problems solved by technology

The main disadvantage of such a topology is that the number of components used increases, resulting in increased losses. Such a topology is not suitable for high power applications

Images