Wyniki wyszukiwania - BazTech

1

Voltage mode control DCM HSD-CIB PFC converter for HB-LED lighting applications

Ramanjaneya Reddy U., Narasimharaju B. L., Asif Md.

Journal of Power Technologies

|

2018

|

Vol. 98, nr 4

305--313

EN

High-brightness light emitting diodes (HB-LEDs) are gaining immense attention from the angle of both residential and industrial applications, owing to their advanced futures of longevity, compact size, high efficacy and eco-friendly nature. To meet advanced future requirements, the LED driver should be robust and efficient. In addition, for HB-LED lighting applications, an ac-dc LED driver demands high-step-down conversion ratio, less source current harmonics, high power factor (PF) and to be cost effective. This work proposes a high-step-down coupled inductor-buck (HSD-CIB) based power factor correction (PFC) converter operating in discontinuous current mode (DCM) to attain high PF with low source current harmonics. Moreover, the proposed HSD-CIB can overcome the demerit of the existing single-stage ac-dc buck PFC converter in terms of highvoltage/current switching stress, gate-driver complexity, low conversion gain and low efficiency. This paper presents the detailed design and analysis of the proposed HSD-CIB PFC converter for an LED lighting system. A closed loop voltage mode control (VMC) is designed and implemented to study the line regulations of HSD-CIB converter at various loading conditions. The analysis of the proposed HSD-CIB topology is carried out using Matlab/Simulink simulation and validated experimentally with a prototype of 16 W.

2

High step-up DC–DC converter based on coupled-inductor and with leakage inductor recycling feature

Banaei M. R., Jahangiri H.

Journal of Power Technologies

|

2018

|

Vol. 98, nr 4

314--321

EN

In this paper a non-isolated single switch high step up DC-DC converter based on coupled inductor is presented. The proposed converter can achieve high voltage gain without extreme duty ratios. The energy of leakage-inductor can be recycled efficiently to the load. This feature improves the efficiency of energy conversion. The steady state analysis, voltage and current stress of the active components, continues, boundary and discontinues current mode operations (CCM), (BCM) and (DCM) of this converter respectively, are discussed in this paper. A conversion of 20 V input to 300 V output in CCM operation under 150 W output power prototype circuit is implemented to verify functionality of the proposed converter. Depending on applications, the proposed converter can deliver suitable voltage to the DC link of a micro-grid inverter in PV panels usage.

3

Design of coupled inductor for interleaved boost converter

Kroics K., Sirmelis U., Brazis V.

Przegląd Elektrotechniczny

|

2014

|

R. 90, nr 12

91--94

EN

This paper presents an analysis of coupled inductor for interleaved boost converter and the effect of coupled inductor on current ripple reduction and on load transient response time. From the analysis a ETD core based coupled inductor structure is proposed to maximize the performance of the DC-DC converter. The inductor can be designed in convenient way by using commercially manufactured coil formers and ferrite cores.

PL

W artykule zaprezentowano analizę sprzężonego dławika stosowanego w przekształtniku typu boost w celu tłumienia tętnień i poprawy stanów przejściowych. Zaproponowano strukturę typu ETD.

4

Topologie dławików wejściowych wielogałęziowego przekształtnika DC/DC

Zdanowski M., Barlik R.

Elektronika : konstrukcje, technologie, zastosowania

|

2014

|

Vol. 55, nr 9

106-110

PL

W artykule przedstawiono wybrane zagadnienia związane z doborem dławików wejściowych wielogałęziowego przekształtnika typu DC/DC o charakterystyce podwyższającej napięcie, sprzęgającego baterię modułów fotowoltaicznych z trójfazowym, dwupoziomowym falownikiem napięcia. Rozpatrzono trzy topologie dławików: jako elementów pracujących niezależnie oraz o dodatnim i ujemnym sprzężeniu magnetycznym. Na podstawie badań symulacyjnych topologie te oceniono pod względem wartości tętnień prądu pobieranego z baterii ogniw słonecznych. Zamieszczono wyniki badań eksperymentalnych przekształtnika dwugałęziowego DC/DC o mocy znamionowej PN = 3kW, zbudowanego z elementów półprzewodnikowych z węglika krzemu, umożliwiających przełączanie z częstotliwością fs =125 kHz.

EN

In this work the selection of input inductors for interleaved DC/DC boost converter as device between PV battery and three phase voltage source inverter was presented. Description of three topologies has been taken into account: two independent inductors, two inversely and directly coupled inductors. Based on simulation studies of these topologies, values of PV battery current ripples were evaluated. Results obtained from experimental tests with use two phase, 3kW DC/DC converter build with use Silicon Carbide semiconductors operating with frequency equal fs =125kHz were also showed.

5

Parallelization of Two Three-Phase Converters by Using Coupled Inductors Built on a Single Magnetic Core

Laka A., Barrena J. A.

Przegląd Elektrotechniczny

|

2013

|

R. 89, nr 3a

194--198

EN

This paper describes the parallelization of three-phase converters by using coupled inductors. The device allows to parallelize two three phase converters by using a single magnetic core and it is equivalent to use three Inter-Phase Transformers (IPT). Two versions of the threephase IPT are presented and the differences between them are explained. The first one consists of a 5 limbs magnetic core whereas the second one is based on a 3 limbs magnetic core. The analytical model of the three-phase IPT is obtained. It has been simulated in Saber and the simulation results have been validated with experimental results.

PL

W artykule przedstawiono możliwą konfigurację do pracy równoległej przekształtników trójfazowych poprzez zastosowanie sprzężenia dławikami. Proponowane urządzenie pozwala na wykorzystanie pojedynczego rdzenia magnetycznego oraz jego odpowiednika w postaci trzech dławików wyrównawczych. Przedstawiono porównanie znanych rozwiązań. Zbudowano model symulacyjny w programie Saber i wykonano badania weryfikacyjne.

6

Inductive coupling simulation

Lipiński P.

Journal of Applied Computer Science

|

2000

|

Vol. 8, nr 1

77-91

EN

The paper presents simulations of coupled inductors, which can be used for wireless, short distance data transmission to a passive receiver. It includes self and mutual inductance calculations of round aerials, SPICE model creation and complete system simulation.