A single-inductor dual-output (SIDO) buck-boost power factor correction (PFC) converter operating in critical conduction mode is proposed this paper. By multiplexing a single inductor, each output of the SIDO can be regulated independently. Compared with conventional two-stage multiple-output converter, PFC benefits from significant overall cost saving, small size, and light weight. Moreover, efficiency improved due to single-stage conversion. The control strategy characteristics are...

Aim to improve the power efficiency of dual-active-bridge (DAB) dc–dc converter, an optimization scheme with triple-phase-shift (TPS) modulation using reinforcement learning (RL) is proposed in this article. More specifically, Q-learning algorithm, as a typical algorithm RL, applied train agent offline obtain optimized strategy, and then trained provides control decisions online real-time manner for DAB converter according current operating environment. The main objective optimal phase-shift...

DC–DC converters with high‐voltage gain and low‐input current ripple have attracted much attention in photovoltaic, fuel cells other renewable energy system applications. Conventional boost–flyback converter can achieve set‐up ratio; however, its input is pulsing the voltage stress across output diode of flyback‐cell high. In this study, by incorporating coupled‐inductor into boost‐cell converter, effectively reduced. Passive snubber circuit utilised to suppress spike power switch,...

Presently, condition monitoring and fault diagnostics in the three-phase voltage-source inverter (VSI) system are already considered essential to improve maintenance efficiency increase reliability levels. This paper presents a new open-switch real-time diagnosis method VSI based on phase currents. First, basis of measured two currents, sum absolute value normalized currents is calculated, whose average less relevant transient such as load variations current frequency variations. Second,...

Compared with constant duty cycle-controlled discontinuous conduction mode (DCM) boost power factor (PF) correction (PFC) converter, quadratic DCM–DCM PFC converter features much lower second-order line frequency output voltage ripple, and however, it suffers from low PF. To increase PF of a variable cycle control technique for is presented in this paper. An approximation equivalent the employed to simplify implementation circuit. The corresponding expressions ripple are analyzed. For input...

Dual active converter (DAB) can achieve high efficiency when the voltage ratio (the of input to output equivalent primary side) is one, but not light-load drops sharply. Based on realization logic DAB light-load, this article proposes a modulation method with asymmetric compression duty cycle, which only increases one degree freedom and does need additional components significantly improve efficiency. First, introduces existing problems solutions traditional scheme puts forward new strategy....

In this paper, the issue of open-switch faults voltage source inverter (VSI) is studied, an adaptive fast voltage-based real-time fault location method proposed. Firstly, for each switching period, deviation calculated by expected and estimated actual voltage, they are obtained via mixed logical dynamic model (MLDM) measured currents, respectively. Then, phase employed as a variable. By way, avoiding use additional hardware, embedding easily in system. Furthermore, considering impact...

In this paper, a series-capacitor-based interleaving buck power factor correction (PFC) converter is proposed, the intermediate energy storage capacitance of which operated at discontinuous capacitor voltage mode (DCVM), and automatic (PF) for obtained. Moreover, across series proposed PFC clamped input voltage, thus peak stress existed in traditional DCVM could be relieved. By effectively regulating charge/discharge time capacitor, ultrahigh step-down conversion ratio achieved, independent...

A high boost ratio non-isolated converter with a ripple-free input current is proposed, which combines zero-ripple cell and coupled inductor to achieve output voltage step-up. passive snubber utilised suppress spike of the switch caused by resonance leakage inductance parasitic capacitance switch. Therefore, low-voltage-rated metal oxide semiconductor field effect transistor (MOSFET) low rDS(ON) can be used improve efficiency converter. In addition, achieved, making electromagnetic...

Series capacitor buck (SC Buck) converters are widely used in voltage regulator modules (VRMs), electric vehicle, photovoltaic (PV) systems, and so on, for the reason that these have characteristics of high step-down ratio large output current. However, can be realized only when converter operates a limited duty-cycle range. In this article, modified pulsewidth modulation (PWM) scheme based on principle ampere-second balance is proposed three-phase SC Buck to solve problem. The series...

Aiming at the limitations of traditional full-bridge dc/dc converters, such as, narrow soft switching range, large circulating loss during freewheeling period, and voltage oscillation on rectifier diodes, in this paper, a series capacitor-based converter is presented to reduce stress power switches half input voltage, by introducing asymmetric pulsewidth modulated (APWM) scheme proposed converter, zero-voltage for all can be obtained. Moreover, due reduced turned-OFF switches, energy...

Dual active bridge (DAB) converter has been widely used in distributed power supply, new energy vehicles, storage systems, etc. Their modulation strategy is an important research direction. At present, the on basically symmetric phase shift, but it not enough to generalize comprehensively. In this article, asymmetric phase-shifting (APS) proposed control flow by simultaneously adjusting duty cycle and angle. With scheme, current stress cyclic loss can be reduced ratio of inductor waveform....

A novel single-phase two-switch pseudo-continuous conduction mode (PCCM) buck-boost PFC converter and its corresponding control strategy are proposed in this paper. The PCCM topology provides an additional degree of freedom to realize control, which can offer significant performance improvements over single-switch converters or continuous (CCM) discontinuous (DCM). simple fast voltage loop be designed output regulation. introduced by inductor current freewheeling operation helps achieve...