Abstract
A two modulation methods of the switching-capacitor inverter are proposed. The inverter output voltage is larger than the input voltage by connect switching-capacitor in series and in parallel respectively. The level output voltages are decided by number of the capacitor. Five capacitors are used to obtain eleven level in output voltage waveform. The proposed inverter is driven by the LS-PWM and LPS-PWM methods. The circuit configuration, states operation and simulation results by using MATLAB/SIMULINK are presented in this paper. The simulation results demonstrated best LPS-PWM method compared with LS-PWM in terms THD of output voltage.
Highlights
AC-DC converters with rise voltage gain are desired in considerable industrial applications such as front-end parts for neat energy sources, Uninterruptible Power Supplies (UPS), Electrical Vehicles (EVs), and Distributed Generation (DG) systems (Yoo et al, 2008; Lu et al, 2017)
EVs are distinguished by motor drive equipments, where power electronic is used in electric power conversion such as Pulse Width Modulation (PWM) inverters and DC/DC converters (Emadi et al, 2006)
The circuit stage operation of the suggested inverter was promoted by the simulation results with a resistive and inductive load
Summary
AC-DC converters with rise voltage gain are desired in considerable industrial applications such as front-end parts for neat energy sources, Uninterruptible Power Supplies (UPS), Electrical Vehicles (EVs), and Distributed Generation (DG) systems (Yoo et al, 2008; Lu et al, 2017). The one phase circuit, switches Sai, Sbi, and Sci (I=1,2,3,4) are used which switch for the capacitors Ch (h=1,2,3,4,5) that connected in parallel to charge and in series to discharge so that the output of the inverter a higher voltage than the input voltage EIN. In these states, the output voltage Vout change between Ein + VC1+ VC2 and Ein + VC1+ VC2+VC4 respectively. The output voltage Vout change between Ein + VC1+ VC2 and Ein + VC1+ VC2+VC4 respectively This stage can be described during the interval which is (t4≤ t ≤ t5), the full-wave inverter switches keep of the states and switches Sai (i=1,2,3) are turned on while switches Sbi and Sci (i=1,2,3) are turned off. 5- when eref > tri and eref < tri so Sa4 is on and Sb3, Sc3 are off
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