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Author

V. Murti

Bio: V. Murti is an academic researcher. The author has contributed to research in topics: Electronic filter & Inductor. The author has an hindex of 1, co-authored 1 publications receiving 4 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, some new active circuits using active circuits are proposed for realization of sinusoidal flux in a ferromagnetic core during loss testing, which facilitates the loss measurements to be made from the primary side itself.
Abstract: Some new schemes using active circuits are proposed for realization of sinusoidal flux in a ferromagnetic core during loss testing. One of the suggested configurations facilitates the loss measurements to be made from the primary side itself. A few filter circuits enable the tests to be carried out on normal supply mains without the need for a calibration generator. Experimental results are reported to confirm the acceptability of the proposed schemes.

4 citations


Cited by
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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

Journal ArticleDOI
TL;DR: Using high performance soluble imide polymer as a binder, it was possible to accomplish a substantial mechanical strength in iron particle cores molded under uniaxial compacting pressure which was much lower than that was commonly applied by others in the past as mentioned in this paper.
Abstract: Using high performance soluble imide polymer as a binder, it was possible to accomplish a substantial mechanical strength in iron particle cores molded under uniaxial compacting pressure which was much lower than that was commonly applied by others in the past The directional ordering of oblate spheroidal iron particles occurred despite the low compacting pressure resulting in strong anisotropy in the magnetic properties and mechanical strength in the fabricated cores The low molding pressure, however, resulted in a low density of core which, in turn, caused the low permeability

2 citations

Journal ArticleDOI
TL;DR: In this paper, two low-cost measurement systems that use active circuits in the power stage are proposed for the DC and AC characterisation of industrial soft and/or hard ferromagnetic materials.
Abstract: Two low-cost measurement systems that use active circuits in the power stage are proposed for the DC and AC characterisation of industrial soft and/or hard ferromagnetic materials. For the DC measurements, the discrete variation of the point-by-point method is simulated by a very low frequency triangular wave. The problems encountered are pointed out and the solution proposed is tested experimentally. The AC source system combines a power amplifier and an operational amplifier with a feedback technique. This allows the option of selecting the power source to be either a constant voltage or a constant current source. Results obtained using these methods on a core sample of mild steel are shown to bring out the performance of the system.