M-Type and CD-Type Carrier Based PWM Methods and Bat Algorithm-Based SHE and SHM for Compact Nine-Level Switched Capacitor Inverter

This paper presents new and efficient modulation techniques applied on the recently introduced compact nine-level switched-capacitor inverter (C9LSCI). The also discusses performance of under selective harmonic elimination (SHE) mitigation (SHM) based heuristic Bat-Algorithm (BA) technique. Two employing CD-type carrier waves M-type are proposed, showing a rise in efficiency, an increase RMS voltage, reduction capacitor voltage ripple, distortion (THD). Four modulating signals, namely third injection, thirty-degree bus clamped PWM (THTDBCPWM), injection sixty-degree (THSDBCPWM), one pole (OPCPWM). Loss balancing two-pole (LBTPCPWM) to with proposed carriers, comparative analysis is carried out different parameters. carriers' efficacy Alternate Phase Opposition Disposition (APOD), (POD), (PD) validated. Further, Bat algorithm as approach determine optimum angles for application SHE SHM. all above C9LSCI verified MATLAB/Simulink environment further validated experimental setup.