Sameer G Kelkar

Title: Sameer G Kelkar: Innovator in Power Conversion Technologies

Introduction

Sameer G Kelkar is a prominent inventor based in Santa Clara, CA, known for his contributions to power conversion technologies. He holds a total of 6 patents that showcase his innovative approach to electrical engineering and power supply systems.

Latest Patents

One of his latest patents is titled "Measuring input voltages from reference windings of power converters with limited on-time." This invention provides a system that operates switched-mode power supplies, such as flyback converters. The power supplies may comprise isolated or non-isolated power converters. During operation, the system senses the on-time of a primary switch in the power converter. Upon detecting that the on-time does not exceed an on-time threshold within a first pre-specified period that spans one or more switching cycles, the system extends the on-time during a subsequent switching cycle to at least meet the on-time threshold. The system may then measure the voltage on one or more reference windings of the power converter during the on-time of the subsequent switching cycle, wherein the reference winding may comprise, for example, an auxiliary winding of the primary winding of the power converter or a secondary winding of the power converter, particularly in the case of isolated power converters utilizing a transformer.

Another significant patent is the "Rectifier with indicator switch." This invention relates to a rectifier with an indicator switch circuit that may be used in a power conversion system. The rectifier with indicator switch circuit may be configured to rectify an AC line voltage and output an indicator signal that is representative of a fault condition in the AC line voltage. The circuit includes a storage capacitor configured to be charged by the AC line voltage during a first half-cycle and a detection capacitor charged by the storage capacitor during a second half-cycle. A switch coupled to the detection capacitor generates the indicator signal based on a voltage across the detection capacitor. This indicator signal may be provided to a controller to disable operation of the power conversion system in response to the detection of a fault condition.

Career Highlights

Throughout his career, Sameer has worked with notable companies, including Power Integrations, Inc. and Apple Inc. His experience in these organizations has allowed him to refine his skills and contribute to significant advancements in power conversion technologies.

Collaborations

Sameer has collaborated with talented individuals in the field, including Arkady A