This paper elucidates a single axis This paper elucidates a single axis This paper elucidates a single axis This paper elucidates a single axis solar tracker system that automatically searches the optimum PV panel position solar tracker system that automatically searches the optimum PV panel position solar tracker system that automatically searches the optimum PV panel position solar tracker system that automatically searches the optimum PV panel position with respect to the sun by means of a DC motor controlled by an intelligent drive unit that receives input signals with respect to the sun by means of a DC motor controlled by an intelligent drive unit that receives input signals with respect to the sun by means of a DC motor controlled by an intelligent drive unit that receives input signals with respect to the sun by means of a DC motor controlled by an intelligent drive unit that receives input signals from light dependent sensors. A prototype of the mechanical from light dependent sensors. A prototype of the mechanical from light dependent sensors. A prototype of the mechanical from light dependent sensors. A prototype of the mechanical imp imp imp implemented with a motor size of 4 lemented with a motor size of 4 lemented with a motor size of 4 lemented with a motor size of 48W. The power supply unit consists of only supply source which is the AC 8W. The power supply unit consists of only supply source which is the AC 8W. The power supply unit consists of only supply source which is the AC 8W. The power supply unit consists of only supply source which is the AC mains. The sensor unit consists of six sensors. While five are fixed and adjacently aligned mains. The sensor unit consists of six sensors. While five are fixed and adjacently aligned mains. The sensor unit consists of six sensors. While five are fixed and adjacently aligned mains. The sensor unit consists of six sensors. While five are fixed and adjacently aligned (tracking sensors), the sixth one is movable as it is attached to the surface of the PV panel (feedback sensor). The (tracking sensors), the sixth one is movable as it is attached to the surface of the PV panel (feedback sensor). The (tracking sensors), the sixth one is movable as it is attached to the surface of the PV panel (feedback sensor). The (tracking sensors), the sixth one is movable as it is attached to the surface of the PV panel (feedback sensor). The control unit is divided into two parts: A priority voltage selector and a movement controller. The priority voltage control unit is divided into two parts: A priority voltage selector and a movement controller. The priority voltage control unit is divided into two parts: A priority voltage selector and a movement controller. The priority voltage control unit is divided into two parts: A priority voltage selector and a movement controller. The priority voltage selector comprise selector comprise selector comprise selector comprises of cascaded comparators which compares the five voltage outputs from the sensors and selects s of cas...

Splitting of a dc voltage source with two capacitors has been the approach in generating 5-level output voltage with single- and three-phase full-bridge circuits and added bidirectional switch. Associated with this configuration is the problem of voltage imbalance between the splitting capacitors. In addition, the inverter output voltage magnitude is obviously limited to the value of the split input voltage source. Presented in this paper is a unit topology for single-phase 5-level multilevel inverter, MLI. It simply consists of a full-bridge circuit, a capacitor, charge-discharge unit and a dc source. The charge-discharge unit with the capacitor is the interface between the full-bridge and the dc source. The proposed unit cell can generate a 5-level output voltage waveform whose peak value is twice the input voltage value. For higher output voltage level, a cascaded structure of the developed unit cell is presented. Comparing the proposed inverter with CHB inverter and some recent developed MLI topologies, it is found that the proposed inverter configuration generates higher output voltage value, at reduced component-count, than other topologies, for a specified number of dc input voltages. For two cascaded modules, simulation and experimental verifications are carried out on the proposed inverter topology for an R-L load. Keywords: Cascaded multilevel, Inverter, total harmonic distortion, topologies, waveform

In this paper, a new grid tied short-through proof solar photovoltaic (PV) inverter that is short-through proof is presented. Detailed presentation of this new solar inverter is preceded by a brief explanation of the generalized solar PV inverter, its types and some representative grid tied solar inverters (mainly micro-inverters) that are currently trending in the solar PV power conversion industry. The merits of each of these briefly explained solar inverter types and power circuits are emphasized. The new grid tied galvanic isolated solar inverter power circuit is then explained in detailed, analyzed and the steady state time varying circuit voltages and currents given. In addition to being short through proof, the new grid tied solar inverter is scalable from solar PV micro-inverter to solar PV central inverter in output power capability unlike the conventional grid-connected single phase inverters.

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