This paper presents a model-based approach for the global maximum power point (GMPP) tracking of solar strings under partial shading conditions. In the proposed method, the GMPP voltage is estimated without any need to solve numerically the implicit and nonlinear equations of the photovoltaic (PV) string model. In contrast to the existing methods in which first the locations of all the local pe...

AbstractThe low common mode voltage vector modulation technique for the three-level cascaded voltage source inverter is presented in the paper. The large number of available states for multilevel inverters can make implementation vector control strategies complicated. The main characteristic of the proposed modulation technique is its simplicity of implementation due to the fact that any availa...

This version is made available in accordance with publisher policies. Please cite only the published version using the reference above. The slow ramp current-voltage characteristics of NH3-plasma-nitrided samples of thermally grown chlorine SiO2, d = 200-350 ~, have been measured and the breakdown voltage statistics determined. The characteristics of the breakdown voltage distribution of a doub...

The dynamic voltage restorer (DVR) provides a technically advanced and economical solution to voltage-sag problem. As the voltage-restoration process involves real-power injection into the distribution system, the capability of a particular DVR topology, especially for compensating long-duration voltage sags, depends on the energy storage capacity of the DVR. The interline DVR (IDVR) proposed i...

This paper proposes a CMOS low-power low-voltage microphone preamplifier for a cochlear implant system. The proposed preamplifier using the Flipped Voltage Follower Current Sensing (FVFCS) technique to achieve low voltage, low power consumption. The proposed circuit was designed and simulated using a 0.35 m CMOS process. Simulation results showed that the preamplifier can achieve 22-dB voltage ...

In this paper, the space-vector pulsewidth modulation (SVPWM) technique for two-phase inverters is proposed. The proposed SVPWM technique is applicable to the two-phase induction motor drives. The two-phase inverters using the proposed SVPWM technique can generate only four space voltage vectors, but cannot generate zero vectors. A reference voltage vector located in the square locus is realize...

This paper presents the application of dynamic voltage restorers (DVR) on power distribution Systems for mitigation of voltage sags/swells at critical loads. DVR is one of the compensating types of custom power devices. An adequate modeling and simulation of DVR, including controls in MATLAB, show the flexibility and easiness of the MATLAB environment in studying and Understanding such compensa...

An ultra-low voltage rail-to-rail operational trans conductance amplifier (OTA) based on a standard digital 0.18μm CMOS process is described in this paper. Techniques for designing a 0.6 volt fully differential OTA are discussed including bias and reference current generator circuit. To rail-to-rail operation complementary input differential pairs are used where Bulk driven technique is used to...

Supply-voltage (VDD) scaling techniques are often employed in low power System-on-Chip (SoC) design; however, adverse impacts such as voltage-dependent timing skews and small sensing headroom have become increasingly significant on memory circuits. In this dissertation, functional failures induced by voltage-dependent timing skews and small sensing headroom in memory circuits are investigated. ...

A new control technique known as inverted error deviation (IED) control is incorporated into the main DC-link capacitor voltage regulation algorithm of a three-level neutral-point diode clamped (NPC) inverter-based shunt active power filter (SAPF) to enhance its performance in overall DC-link voltage regulation so as to improve its harmonics mitigation performances. In the SAPF controller, DC-l...