MUMBAI, India, Sept. 22 -- Intellectual Property India has published a patent application (202631059451 A) filed by National Institute Of Technology on May 10, 2026, for A Compact Five-Level Boost Switched-Capacitor Multilevel Inverter For Renewable Energy Applications.
Inventors include Ranjan Kumar; Anand Kumar; Dr. Alok Priyadarshi; Dr. Raushan Kumar; Dr. Niraj Kumar Dewangan; Dr. Kasinath Jena; and Mr. Ranjan Kumar.
The application for the patent was published on September 18, 2026, under issue no. 38/2026.
Abstract: ABSTRACT OF THE INVENTION This paper presents a new five-level boost switched-capacitor multilevel inverter (SCMLI) design for renewable energy sources. The new topology of inverter can produce five levels of AC output voltages by providing an automatic voltage boost and self-balancing feature by using a lesser amount of power electronic devices. The one-phase topology consists of a single DC source, eight switches, two capacitors, and two diodes, while the three-phase topology consists of five switches per phase with switched-capacitor configurations. The proposed architecture provides a voltage boosting ratio of two without adding any additional DC to DC boost converter, transformer, or external balancing circuits. The switched capacitor configuration allows capacitor voltage balancing without using extra sensors and complex control techniques. The inverter also lowers down the TSV, switching losses, conducting losses, and the total cost of the system. Moreover, the architecture also shows a generalized cascaded architecture that helps in increasing the number of output voltage levels for medium and high power applications. The inverter designed in this study utilizes level-shifted pulse width modulation (LS-PWM), which helps generate superior quality multilevel output voltages that can be used in PV applications or renewable energy technologies. The system operates with stability despite changes in load condition, switching frequency, and modulation index values. The system is capable of delivering an efficiency level of 97.84% while minimizing the use of components and ensuring lower costs during implementation.
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