MUMBAI, India, Nov. 21 -- Intellectual Property India has published a patent application (202531098256 A) filed by Indian Institute Of Engineering Science And Technology, Howrah, West Bengal, on Oct. 12, for 'subtractive duty buck type dc-dc conversion system.'
Inventor(s) include Dr. Suvarun Dalapati.
The application for the patent was published on Nov. 21, under issue no. 47/2025.
According to the abstract released by the Intellectual Property India: "Subtractive Duty Buck Type DC-DC Conversion System The present invention relates to an improved DC-DC Buck type Conversion System, referred to as the 'Subtractive Duty Buck Type DC-DC Conversion System' (SD-Buck Conversion System). The system comprises a power circuit (SD-Buck Converter) with a novel topology and a controller-cum-pulse-generator circuit for generating control pulses to operate a main switch and an auxiliary switch. The proposed converter enables single-stage step-down from a relatively high input voltage to a low output voltage without subjecting the semiconductor switches to ultra-low duty-cycle pulses, thereby reducing switching losses and improving operational efficiency. The converter topology requires only one additional switch and one diode compared to a conventional Buck Converter and operates without a step-down transformer, maintaining a compact size and low weight. Precise pulse-positioning of the switches is not mandatory, allowing flexible control strategies. The converter exhibits an extended zone of continuous conduction for the same inductor, capacitor, and switching frequency values, as compared to conventional single-switch, single-diode Buck Converters. A simple pulse-generation scheme for open-loop and closed-loop operation is also disclosed. The invention offers efficient, reliable, and easily implementable DC-DC conversion suitable for applications requiring high step-down ratios with moderate-duty-cycle control."
Disclaimer: Curated by HT Syndication.
