In this article, a zero-crossing (ZC)-based method is proposed to improve the displacement sensing performance of nonuniform sampling (NUS) theory-based use optical feedback interferometry (OFI) under moderate regime. The incorporation ZCs as phase quantization levels (PQLs) allows doubling samples for subsequent interpolation, without using any dithering scheme. When compared simple dither-fre...

This work deals with the design and validation of a combined control strategy to satisfy requirements for both soft switching Maximum Power Point Tracking (MPPT) Photo Voltaic based (PV-based) battery charging system. The proposed controller is employed two-stage parallel full-wave Zero Current Switching (ZCS) quasi resonant boost converter obtain maximum voltage using Perturb Observation (P&am...

This paper presents a four-stage DC/DC converter with high precision and small ripple utilized in an electronic power conditioner (EPC). The galvanically isolated topology contains four cascade connections: buck circuit, push–pull converter, voltage regulator. switches, as well the diodes output-side rectifier, operate zero-voltage switching (ZVS) zero-current (ZCS) modes at both switch off on,...

Light-emitting diodes (LEDs) have been widely used for various lighting applications. A high power factor single-stage single-switch driver can be used to supply LEDs without using an electrolytic capacitor. By integrating the single-ended primary inductor converter (SEPIC) and flyback converter, LED driver could achieve nearly a unity power factor and low total harmonic distortion (THD). Since...

A soft-switching buck converter is proposed for battery charging application. This converter can also be used with other low voltage miniature applications. Resonant inductor and capacitor helps to turn on-off the switch at zero current. This reduces switching losses in our conventional converter. In order to determine two (current) zero-cross points for switch-on and switch-off, the quasi-reso...

A passive lossless snubber cell is proposed to improve the turn-on and turnoff transients of the MOSFET’s in nonisolated pulsewidth modulated (PWM) dc/dc converters. Switching losses and EMI noise are reduced by restricting di=dt of the reverse-recovery current and dv=dt of the drain–source voltage. The MOSFET operates at zero-voltage-switching (ZVS) turnoff and near zero-current-switching (ZCS...

In inverter design for electric vehicle applications there are several major requirements that should be met. The inverter should be able to operate bidirectionally with reasonably high efficiency under a high ambient temperature. Therefore it is critical to select the suitable main switches for the inverter. In this paper seven types of devices (including 3 dual IGBTs, 1 intelligent dual IGBT,...

In this paper, a soft-switching single-ended-primary-inductance converter (SEPIC) with multi-output sources is proposed. The proposed SEPIC has the following advantages: (1) The conversion efficiency can be increased. To incorporate a soft-switching cell with a flyback-type, the power switches can achieve zero-voltage-switching (ZVS) and zero-current-switching (ZCS) features under turn-on trans...

In this paper, in order to achieve zero ripple conditions, the use of a ripple mirror (RM) circuit for the boost converter is proposed. The operation modes are studied and steady-state analyses performed to show the merits of the proposed converter. It is found that the proposed RM circuit technique can provide much better flexibility than the two-phase interleaved boost converter for locating ...

As a methodology for search and optimization, Genetic Algorithms (GA) has now reached a mature stage. An interesting application of GA is to use it as a rule discovery system inside a Learning Classifier System (LCS), especially in a strength-based system (zero level classifier system, ZCS). An LCS is a good solution for some complex problems. But when facing multiple objectives, the convention...