This paper presents a novel single-phase high-powerfactor (HPF) pulsewidth-modulated (PWM) boost rectifier featuring soft commutation of the active switches at zero current (ZC). It incorporates the most desirable properties of conventional PWM and soft-switching resonant techniques. The input current shaping is achieved with average current mode control and continuous inductor current mode. Th...

This application note describes a 150W rating design guideline for LED street lighting. The application design consists of CRM PFC and LLC SRC with high power factor and high power conversion efficiency using FL7930B and FAN7621S. To verify the validity of the application board and scheme, a demonstration board 150W (103V/1.46A) AC-DC converter was implemented and its results are presented in t...

In this paper, a new bidirectional buck-boost dc-dc converter with capability of soft switching and zero input current ripple is proposed. The coupled inductor is used in the proposed converter to eliminate the input current ripple. In the proposed converter, zero voltage switching (ZVS) and zero current switching (ZCS) can be obtained for the main and auxiliary switches, respectively. In addit...

Bu çalışmada, tasarlanan 8, 16 ve 32’li düzensiz darbe yoğunluk modülasyon (PDM) dağılım kontrollü seri rezonans dönüştürücü ile fotovoltaik (PV) panellerinden elde edilen maksimum güç yüke aktarılmıştır. Çalışmada PDM uzunluklarının değişimine bağlı olarak sistemde meydana gelen değişiklikler analiz edilmiştir. Değişen uzunlukları farklı güneş ışınım koşullarında frekansında noktası takibi (MP...

A new combined boost-Cuk-forward (CBCF) converter with ripple-free input current and low switch voltage stress is proposed for high step-up applications. Two coupled inductors are applied to achieve as well balanced dc-link voltages, wherein the former placed in series boost diode, latter formed a forward converter. Because these output Cuk inductor, also attained. The run at discontinuous cond...

A simple, topology-independent method is proposed for simulating the responses of open and closed-loop quasiresonant DC-DC convertors operating in the zero-currentswitching mode (ZCS-QRC). The method hinges on the substitution of the resonant network and switch assembly, fundamental in the realisation of such systems, by an equivalent circuit which represents its average behaviour. This permits...

In this paper, a new ZVT forward converter is presented in which the third winding of utilised to transfer power from input output, recover energy leakage inductance and snubber capacitance, also provide ZVS condition for switch. proposed converter, main switch turned ON OFF under condition, auxiliary operates ZCS condition. Besides, all diodes are their reverse recovery losses alleviated. More...

Os produtos lácteos são consumidos por serem alimentos saudáveis e com alto valor nutricional. Entre os derivados do leite, as coalhadas vêm se destacando fontes de probióticos compostos bioativos. O objetivo desse trabalho foi realizar a análise físico-química microbiológica comercializadas em feiras da cidade Manaus-AM. Dez amostras foram coletadas diferentes zonas: centro-sul (ZCS), leste (Z...

This article presents a novel structure for high step-up DC-DC converter. The proposed converter offers several advantages, including simple structure, voltage gain, efficiency, reduced stress on the semiconductors, and fewer components. A two-winding coupled inductor has been employed to enhance output level in this topology. suggested only one power switch with low ON-state resistance (RDS-ON...