Multitrack power factor correction architecture

Abstract

Single-phase universal-input ac-dc converters are needed in a wide range of applications. This paper presents a novel power factor correction (PFC) architecture that can achieve high power density and high efficiency for grid-interface power electronics. The proposed Multitrack PFC architecture is a new development of the Multitrack concept. It reduces the internal device voltage stress of the power converter subsystems, allowing PFC circuits to maintain zero-voltage-switching (ZVS) at high frequency (1 MHz-4 MHz) across universal input voltage range (85 VAC-265 VAC). The high performance of the power converter is enabled by delivering power in multiple stacked voltage domains and reconfiguring the power processing paths depending on the input voltage. This Multitrack concept can be used together with many other design techniques for PFC systems to create mutual advantages in many function blocks. A prototype 150 W, universal ac input, 12 VDC output, isolated Multitrack PFC system with a power density of 50 W/in 3 and a peak end-to-end efficiency of 92% has been built and tested to verify the effectiveness of the Multitrack PFC architecture.

Survey of Topology Morphing Control Techniques for Performance Enhancement of Galvanically Isolated DC-DC Converters

“…Resonant Tank [79], [80] Multi-Track Architect [81], [82] Voltage range extension Light-load performance enhancement Static reconfiguration of the input or output stages is a typical TMC approach. However, more advanced techniques are available too.…”

“…Another scalable and reconfigurable architecture of galvanically isolated dc-dc converters employing the TMC is presented in [81], [82]. Its simplest embodiment, the twotrack converter, consists of the switched inductor (boost) circuit, hybrid double inverter, and isolation stage (with two transformers).…”

High Frequency Multicell Cascaded Quasi-Square-Wave Boost Converter

“…Fig. 7 shows an analogy circuit which can enable robust ZVS for the QSW boost cell [8], [9]. This circuit comprises two comparators, one integrator, three voltage dividers, and three logic gates.…”

Bidirectional single-loop current sensorless control applied to NPC multi-level converter considering conduction losses

“…The necessity of PFC is clearly demonstrated in [5], where it is concluded that household electrical appliances with poor PF can impact the voltage at the feeder terminal. Variety of power electronic topologies with power factor correction feature have been introduced and studied in the literature [6][7][8][9][10][11][12][13][14]. The effect of different PFC control approaches operating at distorted input voltage have been studied in [15], where it is stated that sinusoidal current consumption is better than emulated resistor behavior.…”