A Single Source-Based Switched Capacitor Nine-Level Boost Inverter with a Low Switch Count and Self-Balanced Capacitors

Multilevel inverters (MLIs) have becoming an accepted elucidation for medium power high voltage DC to AC energy conversion applications. MLIs encompass a number of advantages over conventional two-level inverters, including lower dv/dt, less electromagnetic interference, the ability to handle higher voltage levels, and advantages such as the ability to produce additional AC voltage levels, a quasi-sinusoidal wave shape, a lesser switching frequency, superior efficiency, and lower harmonic distortion. The main difficulty in using multilayer setups is the increasing quantity of power devices and circuit design, which raises the cost and complexity of control overall. For boost-type DC-AC power conversions, switched capacitor-based multilevel inverters often display a trade-off among switch voltage ratings and switch count. This work proposes a hybrid inverter, which is a mix of a SC unit and a FC structure, to minimize component count and achieve capacitor self-balance. The presented MLI architecture offers considerable benefits in terms of decreased component count, easier control, and voltage boost capability. To create nine levels, 4 pairs of switches are complementary, a single diode, and just 02 capacitors are used. For a given working cycle, the FC may obviously stability at 0.5 Vdc, allowing sensorless operation. In addition, the system cost is significantly decreased. Sinusoidal PWM control scheme has been used to analyze the 9L inverter. The simulation results suggested that the proposed 9L inverter is suited for a broad variety of applications.