Digital non-interleaved high-power totem pole PFC based on double integral sliding mode

Abstract

A PFC circuit for applications higher than 2 kW is generally configured by an interleaved structure, which reduces component stress and the ripple of inductor currents and output voltage. However, when implemented with GaN HEMT and controlled by a double sliding mode, a high-power totem pole PFC could achieve better performance without an interleaved structure. Keywords: PFC, GaN HEMT, Totem pole, Double sliding mode. Classification: Power devices and circuits Electronics, vol.7, pp. 25-36,1992.[2] V. Utkin, J. Guldner, and J. X. Shi, "Sliding Mode Control in Electromechanical Systems," London, U.K. Taylor and Francis,1999.[3] B.Singh, V.Bist, "Improved power quality bridgeless CUK converter fed brushless dc motor drive for air conditioning system," IET Power Electron., vol.6, no.5, pp. 902-913, 2013.[4] J.Yang, A.Faris, W.Zhang, "Small-signal model analysis and control design of a double-ended forward converter in discontinuous-capacitor-voltage mode," IET Power Electron., vol.8, no.5, pp. 802-813, 2015.[5] S.Dian, X.Wen, X.Deng, et al. "Digital control of isolated CUK power factor correction converter under wide range of load variation," IET Power Electron., vol.8, no.1, pp. 142-150,2015.[6] B.Singh, V.Bist, B.Singh , et al."Power factor correction in switched mode power supply for computers using canonical switching cell converter," IET Power Electron., vol.8, no.2, pp. 234-244, 2015. This article has been accepted and published on J-STAGE in advance of copyediting. Content is final as presented.

Transmission characteristics analysis of an MCR-WPT system with SP resonance structure based on harmonic current influence

“…The circuit can realize the tracking function of peak current and voltage and keep the input voltage and the input current in the same phase to make the MCR-WPT system in the resonant state. UCC28070 is adopted in the control circuit, which can provide two interleaved pulse signals to drive the two switches to reduce the ripple of input current and output current [28]. The system simulation parameters are shown in Table II.…”

Digital Noninterleaved High‐Power Totem Pole PFC Based on Internal Model Design

“…According to [1], when / = / = 0, the system works at a stable point. Stability state space equation (6) could be derived as follows.…”

“…Increasing the control order can effectively improve the steady-state error of PFC. Usually PFC requires double integral control [1]. Internal model control adds internal model of reference input to the state variable feedback control, which enables the control system to track all kinds of reference input signals with zero steady-state error, including step signal, slope signal, and other persistent signals [2,3].…”

“…When the power of PFC with Si MOSFETs is higher than 2 kW, interleaved structure is recommended [12][13][14] for the sake of reducing component stress and EMI [15,16], while applying GaN HEMTs, high-power PFC without interleaved structure could achieve better performance [1]. It should be noted that the control method applied to a noninterleaved PFC is the same as the one applied to an interleaved PFC, as long as the boost converter cells of an interleaved system operate in phase-shift mode.…”