A new triple voltage boosting switched-capacitor multilevel inverter (SCMLI) is presented in this paper. It can produce 13-level output waveform by utilizing 12 switches, three diodes, capacitors, and one DC source. The capacitor voltages are self-balanced as all the capacitors present circuit connected across source to charge it desired level for several instants fundamental cycle. detailed co...

The article proposes the algorithm of electric circuit state matrix transformation obtained by modified nodal analysis. is aimed at reducing system electrical differential equations to Cauchy problem form for purpose subsequent solution. Application analysis an with energy inertial elements leads a ordinary equations, which contains singular before derivatives vector in if there are ungrounded ...

Cell voltage equalizers are necessary to ensure years of operation and maximize the chargeable/dischargeable energy of seriesconnected supercapacitors (SCs). A two-switch voltage equalizer using a series-resonant voltage multiplier operating in frequency-multiplied discontinuous conduction mode (DCM) is proposed for series-connected SCs in this paper. The frequency-multiplied mode virtually inc...

Solid-electrolyte tantalum capacitors were first developed and commercially produced in the 1950s. They represented a quantum leap forward in miniaturization and reliability over existing wound-foil wet electrolytic capacitors. While the solid tantalum capacitor has dramatically improved electrical performance versus wet-electrolyte capacitors, especially at low temperatures, today’s electronic...

Flying capacitor multi-level converters use charged capacitors as a critical element. For proper operation, the voltages must be known and regulated. Direct measurement is straightforward, but when number of required measurements high, this complicated approach. This paper introduces an estimation method for n voltages. The scheme based on system ( + 1 ) equations, which defined in way that it ...

This work presents the quadrature sinusoidal oscillator using two Voltage Differencing-Differential Input Buffered Amplifiers (VD-DIBAs), resistors, and capacitors. The VD-DIBA is an electronically controllable active building block with high input low output impedances that can connect to other circuits directly without buffers. With these distinguished features, employed in this design. propo...

DC short-circuit faults are one of the challenges for modular multilevel converter (MMC) based grid. It is vital proper design protection system to estimate fault currents and voltages. The existing calculation methods on RLC equivalent model MMC have enough accuracy in estimating branch but suffer from poor node To better reflect dynamics control during fault, a series circuit parallel with va...

In this paper, the energy characteristics of charge circuits a supercapacitor (nonlinear capacitor) and an equivalent linear capacitor from DC voltage source, which is lithium-ion battery for such storage devices, are analyzed. It established under what conditions losses electricity in nonlinear capacitors source reduced. The influence final initial voltages on similar terminals capacitance reg...

The most critical problem of the modular DC-DC converter (MDCC) is voltage balancing submodule (SM) capacitors, MDCC with stepped 2-level modulation has been developed and presents a good solution, however, this type many restrictions when there wide range capacitance tolerance SM capacitors that results inaccurate capacitor voltages balancing. To solve problem, paper discusses proposed method ...

The concept of multilevel inverters, introduced about 20 years ago entails performing power conversion in multiple voltage steps to obtain improved power quality, lower switching losses, better electromagnetic compatibility, and higher voltage capability. The benefits are especially clear for medium-voltage drives in industrial applications and are being considered for future naval ship propuls...