Abstract
The paper proposes a Current Source Multilevel Inverter (CSMLI) with single rating inductor topology. Multilevel inverters are most familiar with power converter’s applications due to reduced dv/dt, di/dt stress, and very efficient for reducing harmonic distortion in the output voltage and output current. The proposed nine-level current source inverter has been tested under symmetrical and asymmetrical modes of operation, and their activities are compared using PI and Fuzzy PI (Proportional Integral) controllers with multicarrier PWM (Pulse Width Modulation) strategy. MATLAB/Simulink simulation has been made for the proposed converter to obtain its performance measures. Some experimental results are given to verify the presented Current Source Multilevel Inverter.
Highlights
Multilevel inverters can offer substantial benefits for higher power applications, including reduced harmonics, and increased power ratings because of reduced switching device voltage and current stresses
The multilevel inverter configuration can be categorized into the Voltage Source Multilevel Inverter (VSMLI) and Current Source Multilevel Inverter (CSMLI) [4]-[6]
This paper presents a nine-level single phase single inductor current source inverter using multicarrier Pulse Width Modulation (PWM) strategy controlled with PI and Fuzzy PI Controller
Summary
Multilevel inverters can offer substantial benefits for higher power applications, including reduced harmonics, and increased power ratings because of reduced switching device voltage and current stresses. The introduction of current source inverters (CSIs) into this field could lead to marketing advantages due to the advantageous characteristics of this currently less used converter topology These advantages including: 1) a simple structure; 2) short-circuit protection; 3) bidirectional operation; 4) nearly sinusoidal inputs and outputs; 5) the absence of electrolytic capacitors; and 6) the possibility to connect in series GTO or GCT, make the use of CSI in high-power medium-voltage drives highly desirable [11]. Current Source Inverters with pulse width modulation strategies are employed to deliver a minimum distorted input and output waveforms. This inverter circuit is the double cascaded H-bridge multilevel Current Source Inverter. A CSI has a boost operation function, its output voltage peak value can be higher than the DC-link voltage [20]-[23]
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