A low-cost sustainer with a simple energy recovery (ER) circuit for plasma display is proposed in this paper. The proposed ER circuit employs a bidirectional switch consisting of one switch and four diodes. In the proposed sustainer, the insulated gate bipolar transistor (IGBT) can be used as a switch. Since all power switches are turned off under zero-current switching (ZCS), the tail current problem associated with IGBT does not occur in the proposed sustainer. Theoretical analysis and performance of the proposed ER circuit were verified on an experimental prototype operating at 200 kHz switching frequency.

This paper shows a non-isolated modified two switch single-ended primary converter (SEPIC) using voltage multiplier cells. In addition to increasing voltage gain, lowering the duty cycle, and minimising voltage stress across the switches, the proposed enhanced SEPIC converter is made to provide a steady current at the input. The converter will be suited for renewable energy applications due to these enhancements. The proposed two-switch modified SEPIC converter (TSMSC) is validated in this paper by analysing its operation in continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The proposed converter is evaluated against other converters based on a review of its operating modes. The MATLAB simulation is done for 200 W, 20 V/200 V and 50 kHz set up to evaluate the proposed converter. Using the results of MATLAB simulations, the performance of the proposed converter is assessed and validated. This paper also indicates maximum power tracking in a photovoltaic (PV) system using a two-switch modified SEPIC converter and a fuzzy logic controller (FLC). The maximum amount of electricity generated by the PV module is regulated by the fuzzy logic controller. Maximum power point tracking (MPPT) in PV systems under changing irradiation circumstances is described, along with comparisons to the perturbation and observation (P&O) method.

In this paper, an energy recovery for plasma display is proposed. The proposed energy recovery sustainer provides soft-switching of main sustain switches and reduces the switching loss. Due to soft-switching characteristic, the switching losses of main switches are significantly reduced. In addition, the conduction losses in both main and auxiliary switches are effectively reduced by varying a current build-up time according to image patterns. Theoretical analysis and performance of the proposed energy recovery sustain driver were verified on an experimental prototype operating at 200 kHz switching frequency.