DC bus imbalance in a split capacitor based rectifier or inverter system is a widely studied issue. In this paper the DC bus imbalance problem has been studied for a three phase four wire grid connected inverter where the midpoint of the split capacitor is connected to the neutral of grid. The problem has been analysed from common mode point of view and subsequently a low frequency common mode ...

Electrolytic capacitors are a bottleneck for inverter lifetime. Because of the large capacitances used in PV-inverters, a direct replacement by film-capacitors is not feasible for most topologies. This paper presents an active circuit which acts as an interface between the DC-link of a PV-inverter and an additional storage capacitor. By allowing a large voltage ripple at the storage capacitor, ...

A two stage sub-µW Inverter-based switched-capacitor amplifier-filter is presented which is capable of amplifying both spikes and local field potentials (LFP) signals. Here we employ a switched capacitor technique for frequency tuning and reducing of 1/f noise of two stages. The reduction of power consumption is very necessary for neural recording devices however, in switched capacitor (SC) cir...

This paper proposes a feed-forward control in a halfbridge resonant dc link inverter. The configuration of feed-forward control is based on synchronous sigma-delta modulation and the halfbridge resonant dc link inverter consists of two inductors, one capacitor and two power switches. The simulation results show the proposed technique can reject non-ideal dc bus improving the total harmonic dist...

This study presents space vector-based quasi-two-level operation of a diode-clamped multilevel inverter which improves dc link utilisation and output voltage quality, and avoids the dc link capacitor voltage balancing problem experienced with standard multilevel operation. Beside a review of quasi-two-level operation and the capacitor voltage balancing method, the study presents a detailed disc...

A serious constraint in multilevel inverters is the capacitor voltage-balancing problem. The unbalance of the different DC voltage sources of the five-level Neutral Point Clamping Voltage Source Inverter (NPC-VSI) constituted the major limitation for the use of this power converter. To remedy to this problem, a new control solution to compensate the unbalanced DC voltages for the five-level NPC...

This paper presents the topology known as isolated flying capacitor multilevel flyback converter (FCMFC). The uses capacitors (FC) for high-gain, DC-DC power conversion while maintaining primary-secondary isolation and improving efficiency capability of a standard transformer circuit. Three converters have been developed tested, one control, 3 level FCMFC, 4 FCMFC to prove gain benefits this ne...