This paper presents transformerless multilevel converters as an application for high-power hybrid electric vehicle (HEV) motor drives. Multilevel converters: 1) can generate near-sinusoidal voltages with only fundamental frequency switching; 2) have almost no electromagnetic interference or common-mode voltage; and 3) make an HEV more accessible/safer and open wiring possible for most of an HEV...

Three-phase induction motors are widely used in electric traction systems. Impacts of the traction vehicle equipped by three-phase induction motors on power quality are much different from the impacts of vehicles with DC traction motors. In this paper, the effects of the traction vehicle operation with threephase induction motors on power quality in 110 kV transmission network are investigated....

Renewable energy resources (RES) are being increasingly connected in distribution systems by utilizing power electronic converters. However, the extensive use of power electronics has resulted in a rise in power quality (PQ) concerns faced by the utility. A novel control strategy implementing reference compensation current was proposed in this paper. So that these grid-connected inverters can a...

single phase diode clamped multilevel inverter Department of.This paper presents a single phase multilevel inverter for using as a voltage harmonic source. First, a single phase multilevel inverter system is presented and.The structure of the multilevel inverter using cascaded-inverters with separated dc. single phase multilevel inverter 5 Single-phase configuration of an m-level cascaded inver...

There is an increasing demand for construction machines with lower fuel consumption to prevent global warming and to decrease the operational cost. In response to such demand, we have developed a hybrid system for an excavator of the 8 tonne class. The system employs advanced power electronic components, such as an electric motor, inverter and battery. These components are similar to the ones t...

The control of the power semiconductors in a three-level NPC topology employs a set of 12 control signals in total. A back-to-back two-level/three-level inverter has been built to circulate power performing arbitrary load conditions to analyse the thermal dissipation of the power semiconductors. This thermal analysis utilises an IR camera to perform an in-situ measurement and allows precise mod...

This paper discuss about PV cell energy based space-vector pulse width modulation (SVPWM) control methods applied for an H-bridge inverter feeding a 3-phase permanent magnet synchronous machine (PMSM) in electric-vehicle (EV) applications. EVs require a high degree of availability continuity of service. Advantages using svpwm minimization of switching losses, balancing of switching rate between...

This paper deals with fault tolerant multiphase electrical drives. The quality of the torque of vector-controlled Permanent Magnet (PM) Synchronous Machine supplied by a multi-leg Voltage Source Inverter (VSI) is examined in normal operation and when one or two phases are open-circuited. It is then deduced that a seven-phase machine is a good compromise allowing high torque-to-volume density an...

Microgrids are nowadays used to produce electric energy with more efficiency and advantage. However, the use of microgrids presents some challenges. One of the main problems of the microgrids widely used in electrical power systems is the control of voltage, frequency and load sharing balance among inverter- based distributed generators (DGs) in islanded mode. Droop method performance degra...

In this paper three-phase isolated source and non-isolated source cascaded two level inverter (CTLI) topology is used for grid connected photovoltaic (PV) system. The CTLI is one of the widespread topology in multilevel inverter. In this work, both topology isolated source and non-isolated source CTLI system are operated to supply active power with available solar irradiance and to supply react...