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V. G. K. Murti

Bio: V. G. K. Murti is an academic researcher from Indian Institute of Technology Madras. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Papers
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Journal ArticleDOI
TL;DR: An instrument using linear compensating networks and exploiting the processing capabilities of the popular microprocessor is developed for the measurement of core characteristics such as specific iron loss and the dynamic B-H curve.
Abstract: Precise knowledge of the characteristics of core material Is essential for the design of electromagnetic devices I Ike dynamos, I nstrument transformers and relays. Conventional measurement of the core characteristics Is a tedious process as it Involves collection of voluminous data and corrections thereto. An instrument using linear compensating networks and exploiting the processing capabilities of the popular microprocessor is developed for the measurement of core characteristics such as specific iron loss and the dynamic B-H curve. The necessary corrections are Incorporated In the software so that the end result can be straightaway used in design.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: A new, high precision, dual-slope based conversion technique that directly provides a digital output of Ratio Error (RE) and Phase Errors (PE) of an Instrument Transformer (IT) under test is presented.

5 citations

Journal ArticleDOI
01 Nov 1999
TL;DR: In this paper, a PC-based automatic characterisation system (ACS) was developed to automatically characterise magnetic materials under square wave cyclic excitation from 1 kHz to 100 kHz.
Abstract: A PC-based automatic characterisation system (ACS) has been developed to automatically characterise magnetic materials under square wave cyclic excitation from 1 kHz to 100 kHz. A computer-controlled AC to AC converter has been developed for the excitation circuit. A digital oscilloscope gathers the required data through the 8255 interface card. The errors in the ACS have been analysed and overall repeatability is better than /spl plusmn/0.35%. The system has the advantages of ease of use, absence of long-term measuring system drifts and ready variation of high induction and high frequency test parameters. The system operates automatically and measurements on three commercial core materials are reported. Comparisons with the data of manufacturers are included.

3 citations