In this paper, a boost converter with a clamp circuit is proposed for high intensity discharge (HID) lamp application. The clamp circuit provides zero voltage turn on for both main and clamp switches. Compared to conventional boost converters, the proposed converter has the following advantages: (i) high voltage gain without suffering from extreme duty ratio, (ii) low stress on the switches and (iii) low switching losses. Simulation and experimental results show that the voltage stress on the switches are well within acceptable limits and prove the converter’s performance over a wide load range.

Limitations of traditional power sources and the rising need for renewable energy sources have encouraged researchers and manufacturers to enhance the effectiveness of power converters. Recently, numerous high gain topologies have been extensively designed to solve the main issues of the earlier DC-DC boost converters. In this study, a voltage-lift technique is applied to develop a modified high efficiency, high step-up DC-DC converter derived from a typical Cuk converter. The suggested transformer-less circuit also has the benefits of comprising few components and low-cost implementation compared to similar existing converters. Also, the proposed topology effectively boosts voltage gain by including an additional capacitor and a diode. The operational principle and steady-state analysis of the suggested converter in CCM and DCM are discussed in detail. The capabilities of the recommended topology are then demonstrated by mathematical analysis and comparison with previous similar configurations. Furthermore, the parasitic components are considered in the circuit for precisely computing the voltage gain and efficiency. Finally, experimental test results with nearly 210W output power indicate that the proposed converter can be appropriately employed.

This paper introduces a new high step-down converter that achieves zero voltage switching in both primary and auxiliary switches without relying on coupled inductors, thus ensuring low ripple in input and output currents. The auxiliary circuit is optimized with the fewest possible components, facilitating zero voltage switching for the main and auxiliary switches and solving the reverse recovery issue of freewheeling diodes through zero current switching conditions. Additionally, this design reduces voltage stress on the switches, allowing the use of MOSFETs with lower drain-source resistance. A key advantage of this converter is that it avoids using coupled inductors, which eliminates issues related to leakage inductance and potential increases in the converter's size and weight. This enhances the converter's efficiency and practicality. The auxiliary circuit design can also be extended to multiple phases, making it adaptable for various applications. The control mechanism is simple because the auxiliary switch operates in complementary with the main switch, simplifying the overall circuit design and integration. The proposed converter's design and operational principles have been validated through PSpice simulations, and a 90W prototype has been constructed. Experimental results demonstrate an impressive 95 percent efficiency at full load.