The three-phase four-leg inverter can produce balanced voltages even with unbalanced loads, yet its controller design is quite complicated. Based on the analysis on time domain equations, a decoupled sequence control strategy for the three-phase four-leg inverter in a low-voltage network is proposed. A negative sequence controller and a zero sequence controller are added to the control strategy...

Grid connected inverters are important building blocks in renewable energy conversion systems. In conventional voltage sourcing grid connected inverters, any mismatch between the synthesized output waveforms of the inverters and the grid voltage will generate large erroneous currents unless a fast current feedback is used. The current control requires rather fast sampling rates and considerable...

The microelectronic measuring system for conductivity electrochemical sensor measurement of liquid materials properties was designed in CMOS technology. The main parts of the system are current source with switchable ranges, the sensor switches allowing change of the current polarity in compliance with the bipolar pulse method, which was developed specially for this measurement purposes at the ...

This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multifunction device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) ...

Main flux saturation in induction machines plays an important role in a number of operating regimes and therefore has to be accounted for in the process of modelling. The current state space model of a saturated induction machine has gained substantial popularity recently as an excellent tool for transient and steady-state time domain analysis of induction motor drives when the main flux satura...

Abstract An improved high voltage boost Z-source inverter topology is proposed to improve ability. Compared the conventional inverter, it can produce very with a short shoot-through duty ratio, stress on capacitors and inverter-bridge greatly reduced, has inherent limitation inrush current at startup. The addition of input capacitor an active switch allows in Z source network flow reverse direc...

Three-phase converters based on insulated-gate bipolar transistors (IGBTs) are widely used in various industrial applications. Faults IGBTs can significantly affect the operation and safety of power electronic equipment loads. It is critical to accurately detect inverter faults as soon they occur ensure system availability high-power quality. This study provides a novel integration signal data-...

The high-frequency modulation method (HFM) for a switched capacitor (SC) inverter often leads to high switching loss since it increases frequency. In order reduce the frequency and in HFM SC inverter, this paper proposes novel hybrid strategy as well corresponding demo topology. limits number of switches, thus reducing significantly. Meanwhile, topology maintains merits current such low switch ...

This paper proposes a fully analytical loss model to reduce circling currents and improve the power efficiency of class Φ2 inverter. Firstly, expression switching node voltage is derived by analyzing its harmonic components. Based on result, switch modeled as source, where circuit simplified linear network expressions branch are solved. Secondly, root mean square (RMS) values component losses c...

The multilevel inverter-based drive system is greatly affected by several faults occurring on switching elements. A faulty switch in the inverter can potentially lead to more losses, extensive downtime and reduced reliability. In this paper, a novel fault identification reconfiguration process proposed using discrete wavelet transform auxiliary cells. Here, exploits multiresolution analysis wit...