The three-level neutral-point clamped voltage source inverter (3L-NPC-VSI) is widely used in the maglev traction systems due to its high output voltage, large capacity and low current harmonics. In order improve utilization of DC-bus an overmodulation strategy necessary. This paper proposes improved based on minimum amplitude error method for a 3L-NPC-VSI. Compared with conventional method, hig...

in this paper, a new topology for boost z-source inverterbased on switched-inductor cell is proposed. the operating modes of the proposed inverter are analyzed and also a suitable control method to generate the trigger signals of the inverter is presented. having a common earth between the input source and inverter and capability to generate a higher voltage gain by using lower amounts of the d...

Two algorithms have been extensively studied for motor control: Field Oriented Control (FOC) and Direct Torque (DTC). Both control use a Voltage Source Inverter (VSI) to drive Permanent Magnet Synchronous Motor (PMSM). To prevent short-arm short-circuit accidents when driving PMSM using VSI, dead time is used turn off the TOP BOTTOM switches of each arm at same time. However, this dead-time tec...

It has been established that shunt active power filters are suitable for compensating harmonics in the current fed type harmonic producing loads, likewise the series active power filter (APF) are considered to be suitable for voltage fed type harmonics-producing load. This paper discusses the indirect current control approach in terms of its simplicity and effectiveness for the operation of a s...

Solar photovoltaic (SPV) power systems can be employed as electrical power sources to meet the daily residential energy needs of rural areas that have no access to grid systems. In view of this, a standalone SPV powered air cooling system is proposed in this paper, which constitutes a dc-dc boost converter, two voltage source inverters (VSI) connected to two brushless dc (BLDC) motors which are...

Abstract-Voltage sag or unbalance conditions at the input rectifier stage of the ac-dc-ac rectifier-inverter induction motor drive can cause the significant amounts of harmonic voltage at twice the line frequency 2f1. This voltage ripple can have a degrading effect on the induction-machine performance characteristics. This paper presents an analytical closed-form mathematical model and analysis...

This paper proposes a hybrid transformerless photovoltaic (PV) converter with simultaneous AC and DC outputs. It is specifically suitable for residential PV systems due to its high efficiency, versatility flexibility, while maintaining lower leakage currents. The proposed configured by replacing the control switch of boost voltage-source inverter (VSI), enabling multiple In addition, symmetrica...

The paper presents a detailed modeling and simulation of different control schemes of the real and reactive power flows in a three-phase voltage source inverter (VSI) interfacing a photovoltaic (PV) generation system to the power grid. Synchronisation of the inverter and grid AC waveforms is achieved using a phase-locked-loop (PLL) circuit. An effective decoupling strategy based on proportional...

This paper describes the decoupled torque and flux control of a two series connected five-phase Induction Machine (IM) drive that is supplied by a three-level five phase SVPWM inverter, using a well known phase transposition in the series connection. At the first, the decoupled torque and flux controller is developed based on variable-structure control (VSC). Then, a sliding-mode (SM) flux obse...

In this paper, the virtual synchronous generator (VSG) concept is utilized in controller of grid-connected dual two-level voltage source inverter (DTL VSI). First, topology VSG and DTL VSI are presented. Then, state-space equations (TL VSI), regarding presence phase-locked loop (PLL) VSG, given. Next, small-signal modeling TL realized. Eventually, stability enhancement compared with demonstrate...