This article proposes a high-step-down dc-dc converter for electric vehicles with an 800 V battery system. The proposed significantly reduces the current rating requirement dc blocking capacitor on secondary side by reconstructing circuit. maximum duty cycle of is larger than phase-shift full-bridge converter, which allows use leakage inductance. turns out to be crucial advantage achieve wide range zero voltage switching (ZVS) in high frequencies over 500 kHz. In addition, three-level...

This paper proposes a modular single-stage EV on-board chargers without electrolytic capacitor that is available with single-phase and three-phase grid. For input, the proposed charger capable of DC charging in essence. Battery current ensures by an integrated power decoupling circuit for even elimination capacitors. Moreover, due to its current-fed nature, pre-determined adaptive duty cycle adjustment more suitable wide voltage variation one control variables, which enlarges ZVS range. A...

This paper presents the design and optimization of an integrated magnetic structure that combines grid inductors transformer in single-stage EV -charger. The proposed integration technique reduces number bodies, hence reducing cost total core loss while increasing power density. By utilizing fixed 50% duty cycle operation converter, a further reduction can be achieved resulting improved light-load efficiency. also analysis optimal PCB winding arrangements for to achieve low AC stray...

This paper proposes a high-step-down DC-DC converter for electric vehicles (EVs) with 800V battery system. The output of the input series half bridge (ISHB) is reconstructed to reduce DC blocking capacitor in secondary. maximum duty cycle proposed can be larger than 0.5, which allows use leakage inductance. turns out crucial advantage achieve fully range ZVS high switching frequency over 500kHz. two transformers are integrated partial cancellation, resulting 20% power loss and 32% footprint...

This article presents a modulation scheme for achieving high-efficiency and high-power quality based on the secondary duty cycle phase shift single-stage electrolytic capacitor-less bidirectional onboard charger. Zero voltage switching is achieved all switches wide range operation an optimized which increased efficiency of converter. Meanwhile, high power guaranteed by varying directly generated controller. To validate proposed scheme, experimental results from 3.7kW charger are provided at...

This paper proposes a new magnetic integration approach that combines all the components, including leakage inductor, transformer, and filter inductors in current doubler circuit. The core structure proposed this study is applicable to different topologies incorporate By adopting all-in-one structure, assembly of components simplified, leading reduction costs. not only reduces costs but also increases ZVS energy output ripple. Furthermore, total volume by 15.7% loss 8.5% compared...

This article proposes a planar magnetic integration technique that combines the grid inductors and transformer in single-stage E-capless electric vehicle charger into one core. The proposed reduces number of components; therefore, cost, total core loss, volume can be significantly reduced. Using integrated structure, overall converter power density increases up to 11.1% compared nonintegrated one. also presents detailed analysis optimal printed circuit board (PCB) winding arrangement...

In this paper, a low-cost 63kW/L DC-DC converter operated at 300kHz is proposed for 800V fuel cell electric vehicles. Four modules of Dual Floating Output Boost Converter (DFOBC) are adopted to process 100kW power from the FC stack. For each module, an inverse coupled inductor and ZVT cells employed. Advantages over Conventional Interleaved (CIBC) which usually used in previous FDC found be: 1) Planar core with PCB winding can be main inductor; 2) Tall film capacitors replaced by low-profile...

In this article, a modular output series-parallel series resonant converter (SRC) differential buck is analyzed for high-power, ultra-wide-voltage applications such as battery formation systems and bench-type power supplies where zero voltage discharging function required. An independent control method in one module proposed to increase the efficiency of compared conventional complementary method. output-series connection, higher can be achieved by shedding needless modules low range. Module...

This paper proposes a high-efficiency modulation scheme and magnetic integration for single-stage microinverter module-level power electronics. The proposed 400W achieves full zero voltage switching dc input voltages ranging from 18V to 58V, using half bridge matrix-based DAB structure. method is easy control enables high density due the use of constant frequency. In addition, transformer series inductor reduced volume converter by 18%, loss 50% separated cores. To validate method,...

The paper proposes an improved pulse width modulation algorithm to solve the voltage imbalance on DC capacitors for single-phase T-type inverter. By changing index, residual states can be applied discharge/charge state balance voltage. proposed is validated application in inverters independent mode. simulation and experimental results have confirmed effectiveness of method