Comparative Study of Three Different Topologies of Five-Level Inverter with SPWM Modulation Technique

Abstract

Multilevel Inverter (MLI) has attracted a great attention by different researchers and industries due to its capability in handling high power application and minimizing the harmonics contents in the output. This study propose three different topologies of [7].Naturally the ,the energy produced by the renewable energy resources is DC energy. Because of most of the home appliances as well as industrial applications operate using AC energy, the renewable DC energy generated need to be converted into AC energy. This conversion can be achieved utilizing power electronic inverter [8] which mainly designed to convert the DC energy into AC energy.The first designed inverter is 2-level inverter which limited to low power application due to less capability and power rating [9].In order to handle high power applications and increase the power rating of the inverter ,Multilevel Inverter (MLI) was introduced [10]- [12]. The main advantages of MLI are the capability of handling high and medium industrial application [13] and minimizing the cost of filtering circuit since the MLI produce almost sinusoidal AC signal [14].MLI can be designed as ,five-level [16] , seven-level [17] and so on [18]. The number of level is in direct relationship with output signal, where the output signal can be enhanced as the number of level increased, however high number of level require large number of components which will result in very expensive design. Recently, various researchers and industries are focusing in utilizing the MLI in drive application such as Switched Reluctance Motor (SRM) [19], Induction Motor (IM) [20] and Permanent Magnet Synchronous Motor (PMSM) [21]. The multilevel inverter produce less harmonic contents in its output voltage and current .also the power switches in multilevel inverter experience low voltage stress and low electromagnetic interferences (EMI) [25].

Investigation on torque ripple minimization in switched reluctance motor by using different techniques associated with TSF taking into account of magnetic saturation effects

“…To supply the SRM, one of the most important parts is modeling the power converter that can efficiently produce a desired output. Several researchers have investigated in the production of the control circuit of this type of machine [17] [18] [19]. The SRM is satisfied with a unidirectional power supply for each phase since the direction of the current has no influence on the sign of the torque produced.…”

“…From relation (19), we obtain the dynamics phase currents as a function of parameter 𝜆 of the sliding surface:…”

Transmission system regularization with 5-level cascaded IPFC

“…It is adapted for reductioninharmonic content in output voltage and obtainingsinusoidal output. Implementation of this is easy and several studies were done [24]. The gate pulses are generated when sinusoidal reference signal is compared with rectangular carrier wave.…”