A dual‐output single‐input non‐isolated DC‐DC converter with reduced semiconductors stress

Abstract

This work proposes a novel topology of two‐output high voltage rate DC‐DC converter based on coupled inductor and voltage multiplier cells (VMCs) techniques for renewable energy usages like photovoltaic (PV) systems. The proposed structure has two independent output ports with two voltage gains (M1 and M2). Low voltage stress across the power switch and diodes, common ground between input and output ports, high efficiency, and reduced number of elements are the advantages of the suggested converter. The used diodes are switched at zero current switching (ZCS) and zero voltage switching (ZVS) conditions, which reduce the losses of diodes and subsequently increase the power efficiency. Due to the usage of the coupled inductor, there is no need to a high value of the power switch's duty cycle. Therefore, a low conduction loss and higher efficiency can be obtained. On the other hand, because of the reduced voltage stresses, low rated semiconductors can be used for operation of the presented converter, which decrease the cost and the volume. To demonstrate the performance and effectiveness of the proposed topology, operation principles, steady‐state and efficiency analysis, and also the comparison assessment are provided. Finally, a 200 W experimental development with 50 kHz operation frequency, 20 V input voltage, and 200 and 100 V loads voltages has been implemented in the lab to prove the mathematical surveys.

Newly designed single‐stage dual leg DC‐DC/AC buck‐boost converter for grid connected solar system

“…Voltage stress and conduction losses are also considered. To calculate blocking voltage value based on number of switches and its equation is given in (20).…”

“…18,19 Second, Figure 1D depicts existing converter 4 offers better reliability, as it allows for fault tolerance. 20 Combination of interleaved single-input multiple-output DC-DC converters is presented but more number of inductors may cause electromagnetic interference. 21 Multi-stage DC-DC converter using active LC2D network concept concentrating only in components reduction since overall performance is less.…”

“…First, it provides better power flow control, allowing for bidirectional power flow 18,19 . Second, Figure 1D depicts existing converter 4 offers better reliability, as it allows for fault tolerance 20 . Combination of interleaved single‐input multiple‐output DC‐DC converters is presented but more number of inductors may cause electromagnetic interference 21 .…”

Design and implementation of dual‐leg generic converter for DC/AC grid integration

“…20,21 According to this proposed research concept, the proposed converter can accept both AC/DC supplies and also deliver power to AC/DC load,; because the converter is more flexible, it can perform all four types of power conversion with minimal number of switches. This same operation is performed with more number of switches, 22,23 but proposed converter can perform all four operations in bidirectional with less switching losses. Proposed work is devoted with novel idea of generic or universal operation for energy storage system.…”

A non‐isolated DC‐DC topology with high voltage rate based on magnetic coupling and voltage multiplier method

“…Furthermore, societies are confronting energy constraints due to the non‐renewability of fossil resources. As a result, renewable energy must be generated more than before 2,3 . Solar energy, according to studies, is the world's foremost energy source 4 .…”