Step-up DC–DC converter by coupled inductor and voltage-lift technique

Abstract

A DC -DC converter with high step-up voltage gain is presented. The proposed converter uses the coupled inductor and the voltage-lift technique to achieve high step-up voltage gain. Additionally, the voltage on the active switch is clamped, and the energy stored in the leakage inductor is recycled in the proposed converter. Therefore the voltage stress on the active switch is reduced, and the conversion efficiency is improved. Finally, a laboratory prototype circuit with input voltage 12 V, output voltage 100 V and output power 35 W is implemented to demonstrate the performance of the proposed converter.

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

“…Therefore, many studies have developed a new architecture to overcome the shortcomings of a conventional boost circuit. In particular, switch capacitor [9][10][11][12][13], coupled inductor [14][15][16][17][18][19][20][21], and voltage lift [22,23] techniques have been proposed. A coupled inductor step-up circuit with a simple inductive winding structure was used to achieve low voltage stress of the main switch and a high voltage conversion ratio.…”

A Multistage DC-DC Step-Up Self-Balanced and Magnetic Component-Free Converter for Photovoltaic Applications: Hardware Implementation

“…The finite switching time in a normal power device limits the switching frequency if the duty ratio is either too high or too small, so in order to abolish the above problems and simultaneously acquire essential high voltage, isolated converters can be engaged. Many isolated and non-isolated converter topologies have proposed over time, which make use of inductors, coupled inductors and transformers [16][17][18][19][20][21][22][23][24][25][26][27]. The high voltage stress occurring due to the transformer leakage inductance leads to switching losses and electromagnetic interference (EMI) problems, resulting in the reduced efficiency of conventional converters.…”

Multistage DC-DC Step-Up Self Balanced and Magnetic Component Free Converter for Photovoltaic Applications—Hardware Implementation

“…So, in order to abolish above crisis and simultaneously acquire essential high voltage, isolated converters can be engaged. Many isolated and non isolated converter topologies are proposed over the period of time, which makes the use of inductor, coupled inductors and transformers [16][17][18][19][20][21][22][23][24][25][26][27]. The high voltage stress occurring due to the transformer leakage inductance leads to the switching losses and electromagnetic interference (EMI) problem, resulting in the reduced efficiency of conventional converters.…”