4-Pentenoxyl radicals sharing two or more carbon atoms with a cycloalkane cyclize in a predictable manner stereoselectively and regioselectively to afford in solutions of bromotrichloromethane cycloalkyl-fused or -bridged 2-bromomethyltetrahydrofurans in up to 95% yield. Stereoselectivity in alkenoxyl radical ring closures arises from cumulative steric effects. The substituent positioned the cl...

Electric drives are gaining much importance in the present scenario, as the conventional energy sources are at the verge of depletion. The PMDC (Permanent Magnet Direct Current) Motor Drives are becoming popular, for its usage in compact electric vehicles. This paper presents a comparative study of well-known KY converter, its coupled inductor step-up derivative, with the boost converter to acc...

The possibility of using non-Foster circuit to expand the bandwidth of a monopole antenna is investigated theoretically. Beginning with an inductor-loaded monopole antenna resonating at different frequencies by changing the value of the loaded inductor, we show that a frequency-dependent inductor is needed to enhance the bandwidth of the monopole antenna. The curve for the reactance of the freq...

This paper presents the results of investigations on integrated inductors for a new low cost MCM-D substrate technology. The results are focused on the analysis of design options and design parameter for planar spiral inductors. Measurements on test structures were used to quantify process tolerances and inductor performance and to set up accurate models for em-simulations. Simulation results o...

Assuming that the reader is familiar with basic magnetic design theory, this topic provides design guidance to achieve high efficiency, low electromagnetic interference (EMI), and manufacturing ease for the magnetic components in typical offline power converters. Magnetic-component designs for a 90-W notebook adapter and a 300-W ATX power supply are used as examples. Magnetic applications to be...

This paper proposes a single-stage Sepic-type high brightness LED driver for universal line input to perform power factor correcting and LED dimming. In the driver, a coupled inductor is introduced to replace with two separate inductors to lower volume and cost. A soft-switching cell is embedded into the driver to obtain zero-voltage switching ZVS feature so as to furthermore improve driver eff...

igh performance microprocessors require a lowvoltage, high-current power supply with fast transient response. Therefore, interleaved multiphase synchronous buck converters have gained popularity as the VRM for these microprocessors. Multiphase converters must share load current to balance thermal stress on each phase, so it’s important to address current sensing and sharing. You can use the cur...

An averaged model of a coupled-inductor boost converter using the piecewise complementarity model of the converter under sliding motions is obtained. The model takes into account the idealized voltagecurrent characteristic of passive switches (diodes) present in the converter. Because of its lower complexity, the averaged model is more suitable for control design purposes as compared with the l...

In this work, a fractional chaotic system is introduced, where the capacitor and the inductor of the original circuit are replaced by a fractional electric element called fractance. Moreover, a feedback nonlinear controller is designated and used both to control chaos in this fractional system to its unstable (equilibriums or periodic orbits) and to achieve identical synchronization. Furthermor...

To lighten and stiffen the structural components used in automobile bodies, variable curvature local-induction-heating bending forming (VC-LIHBF) technology was developed. However, few studies have been conducted on optimization of geometric parameters inductor LIHBF process. This paper focuses improvement cross-sectional distortion limit thin-walled rectangular steel tubes (TWRSTs) without man...