Capacitor Clamped Coupled Inductor Bi-Directional DC-DC Converter with Smooth Starting

Abstract

In this paper, a new type of capacitor clamped coupled inductor bidirectional DC–DC converter is proposed, which offers high voltage gain with smooth starting current transients, as well as reduced stresses on the capacitor. Steady state operation, mathematical modelling, and state space modelling for the proposed converter are presented in detail. A simplified single voltage clamped circuit is developed to mitigate the voltage spikes caused due to the coupled inductor by recovering the leakage energy effectively. Moreover, the clamping capacitor helps in reducing the ripples in output voltage, which in effect significantly reduces the stress on the switch and offers less ripple content at the load terminals. Simulation of the proposed converter is carried out using Simulink/MATLAB for the conversion of 24V DC to 200V DC. For this conversion, simulation results have proven that there is reduction of 13.64% of capacitor voltage stresses. Further, under line varying conditions, converter responses have proven that there is a 119% and 25.25% reduction in input current and output voltage transients, respectively. Similarly, 25.25% and 76.5% transient reductions of input current are observed for line and control parameter variations. The hardware investigation of the converter was carried out with a 100 W, 24 V/200 V setup. The converter achieved efficiency of 93.8%. The observations supplement the simulation results.

Design of Novel Modified Double-Ended Forward Converter for Stepper Motor Drive

“…In addition, the use of a p Further, the graphical illustration of the comparative assessment between the proposed and existing converting technique is given in Figure 13. The proposed DEFC is compared with other existing inverters, such as the Differential Boost Inverter (DBI) [24], Quasi Z-Source Inverter (QZSI) [25,26], Buck-Boost Inverter (BBI) [27], Switched-coupled inductor inverter (SCII) [28], Improved Differential Boost Inverter (IDBI) [29], Split-Inductor Differential Boost Inverters Type-I (SIDBI-T1) [30], Split-Source Inverter (SSI) [31], Split-Inductor Differential Boost Inverters Type-II (SIDBI-T2) [30] Simplified High Gain Quasi-Boost Inverter (SHGqBI) [32], Bi-directional DC-DC Converter (BD DC-DC) [11], and Quasi-Z-Source Boost DC-DC Converter (QZS-DC-DC) [21]. From the illustration, it is observed that the proposed DEFC converter attains a higher efficiency rate (more than 97%) and found to be greater than other conventional inverters.…”