Research on Five-Level PFC Circuit Topology Based on Switch-Diode-Capacitor Network

Abstract

In this paper, a family of a novel single-phase three-level PFC based on a switch-capacitor cell is proposed. The proposed PFC topologies have the characteristics of high power factor, low voltage stresses, and low power losses. Firstly, the derivation process of the novel PFC topologies is introduced in detail. Based on a representative circuit of the proposed novel PFC topologies, its operation principle is analyzed from the aspects of working current paths, key waveforms, and pulse distribution. Meanwhile, its equivalent circuit model is deduced. Secondly, the performance of the proposed PFC topologies is analyzed. Then the modulation technology based on capacitor voltage balancing is designed for the proposed topologies. Finally, an experimental prototype with a rated power of 800 W and a DC output voltage of 400 V is built. The experimental analysis is carried out from both the steady state and dynamic state. The experimental results verify the feasibility of the proposed novel three-level PFC topologies and the effectiveness of the modulation technology.

Single-Phase Bridgeless Three-Level Power Factor Correction Topologies Based on the Embedded Construction Scheme

“…This design divides one power grid cycle into six intervals, which corresponds to the allocation of switching pulses according to specific circuit operating modes in each interval. This phenomenon is similar to the principle of the SVPWM sector division [14]. With the correct allocation of the driving pulse signals for the switch devices, the proposed topologies can achieve three-level operation.…”

“…The performance of conventional bridgeless PFC circuit topologies is the use of multilevel circuits. This approach has attracted the attention of numerous researchers [9][10][11][12][13][14]. The conventional multilevel topology is shown in Fig.…”

New combined control strategy of on-board bidirectional battery chargers for electric vehicles

“…Where: 𝑉 𝐶𝑏𝑢𝑠 = 500 𝑉, 𝑉 𝑏𝑎𝑡𝑡𝑚𝑖𝑛 = 330 𝑉, 𝑉 𝑏𝑎𝑡𝑡𝑚𝑎𝑥 = 385 𝑉, and 𝑇 = 50 𝜇𝑠. The numerical application of in ( 8), ( 9), ( 10) and (11)…”

“…Suggested a bidirectional single-phase ANPC 5LC for use in filtering active in G2V, V2G, and V2H apps [10]. Suggested a multi-level active rectifier with self-balanced capacitors and five voltage levels [11]. It discussed the working concept, modulation technique, closed-loop control.…”