An optimized multilevel inverter is implemented for 3 phase induction motor drive. The Main Feature Of this Circuit is to boost of the Battery Voltage as twice as possible along with multilevel staircase output voltage which approaches nearly sinusoidal wave. By using appropriate switching strategy of two capacitors the desired waveform can be achieved, hence significantly reducing the number o...

We present a method to characterize sub-10 nm capacitors and tunnel junctions by interferometric scanning microwave microscopy (iSMM) at 7.8 GHz. At such device scaling, the small water meniscus surrounding the iSMM tip should be reduced by proper tip tuning. Quantitative impedance characterization of attofarad range capacitors is achieved using an 'on-chip' calibration kit facing thousands of ...

This paper describes a successful strategy for measuring the power dissipated by high-voltage, low-capacitance ceramic chip capacitors at frequencies typical of switch-mode power supplies. For these devices, the simpler techniques employed to measure the power dissipation of highcapacitance tantalum and aluminum devices prove inadequate, and a more fundamental approach is required. The various ...

The aim is to manage the transmitted reactive power in electrical grids using variable capacitor batteries according criterion of minimum energy loss under different annual load schedules and numbers sections. main theoretical relations were obtained by methods mathematical modelling integral calculus theory optimal control. influence number sections a battery on losses grid was estimated compu...

This paper presents work towards heterogeneous integration of high-efficiency power amplifiers (PAs) with tuner and biasing circuits implemented with micro-electro-machined elements. The PAs operate in switched mode with over 70% efficiency at X-band. Many such switched-mode amplifiers are used as the active portion of spatial power combining antenna arrays, with 2.3kW ERP at 8.4GHz at 65% drai...

This paper presents a novel ac-dc power factor correction (PFC) power conversion architecture for single-phase grid interface. The proposed architecture has significant advantages for achieving high efficiency, good power factor, and converter miniaturization, especially in low-to-medium power applications. The architecture enables twice-line-frequency energy to be buffered at high voltage with...

Abstract: Plasma processing is used in a variety of industrial systems, including semiconductor manufacture (deposition and etching) and accurate control of the impedance matching network is vital if repeatable quality is to be achieved at the manufacturing process output. Typically, impedance matching networks employ series (tune) and parallel (load) capacitors to drive the reflection coeffici...

Recently the reduction of power consumption is one of the most important issues in the design of LSI circuits. Circuit designers quite commonly evaluate the power consumption on the basis of the “fact” that when we charge a capacitor C by a voltage source E or when we discharge the capacitor with the voltage E we consume the energy of 12CE . This “fact” can be verified typically for the simple ...

We have fabricated advanced metal–insulator–metal (MIM) capacitors with ultra-thin (200 Å) remote-PECVD Si3N4 dielectric layers having excellent electrical properties. The breakdown field strength of MIM capacitors with 200-Å-thick Si3N4 was larger than 3.5 MV/cm, which indicates the excellent quality of the deposited Si3N4 film. The main capacitance per unit area extracted by radio frequency (...