Abshc-In a preview publication by the authors it was shown how swhbed-capacitor (SC) networks can bc analyzed by using nodal charge qUatfons. The result was a description of SC networks as time-variant sampled-data networks which led to a four-port e4@valent circuit rep* sent&ion in tbe z-domain. In this paper, the four-port representation is expanded by considering six basic building blocks fo...

Direct AC analysis of idealized switched-capacitor circuits in Spice-compatible programs is described in the paper. The capacitor is described by a special macro-circuit, whose mathematical model is based on modified zdomain charge equations and on the theory of equivalent signals.

A novel high step-up DC-DC converter with coupled-inductor and switched-capacitor techniques is proposed in this paper. The capacitors are charged in parallel and are discharged in series by the coupled inductor, stacking on the output capacitor. Thus, the proposed converter can achieve high step-up voltage gain with appropriate duty ratio. Besides, the voltage spike on the main switch can be c...

A high step-up DC-to-DC converter that integrates an isolated transformer and a switched-clamp capacitor is presented in this study. The voltage stress of the main power switch should be clamped to 1/4 V by using the turn ratio and switched-clamp capacitor of an isolated transformer to achieve a high voltage gain. In addition, a passive clamp circuit is employed reduce voltage stress on the mai...

A new type of drivers for light emitting diodes (LEDs) is introduced based on the switched-capacitor frequency modulation. In contrast to conventional constant dc current drivers, the current pulse is provided by this new switched-capacitor LED driver. In the present driver, the charging capacitor is charged and discharged through a LED and the current flow direction is controlled by a metal ox...

A closed-loop high-gain switched-coupled-inductor switched-capacitor (SCISC) converter is proposed by combining a sawtooth wave generator, pulse-widthmodulation based (PWM based) compensator and nonoverlapping circuit for step-up DC-DC conversion and regulation. The power part between source VS and output VO contains two sub-circuits: (i) a switched-coupled-inductor (SCI) booster circuit, and (...

Cascaded multilevel inverter (CMI) topology is prevalent in many applications. However, the CMI requires switches and isolated dc sources, which main drawback of this type inverter. As a result, volume, cost complexity are increased efficiency deteriorated. This paper thus proposes switched-capacitor-based with half-bridge cells only one source. Compared to conventional CMI, proposed uses almos...

This paper proposes a high voltage gain dc/dc converter with coupled inductor cells and switched capacitor for renewable energy applications. It includes coupled inductor, switched capacitor and voltage multiplier cell. Switched capacitor charged during off period by using the energy stored in the coupled inductor. This will increase the performance of the converter. The voltage gain of traditi...

Switched reluctance motor (SRM) drive has a remarkable characteristic, high efficiency, and good controllability, which makes it attractive for high-speed applications. In this paper, the basic control strategy for a switched reluctance motor drive circuit is explained and then three different resonant discharge topologies for SRM drive circuit are proposed. Due to resonantly discharging of exc...