Journal ArticleDOI
Active circuits for flux waveform compensation in ferromagnetic cores
P. Sankaran,V.J. Kumar,V. Murti +2 more
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TLDR
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.read more
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A Microprocessor Based Measuring Instrument for Rapid Testing of Transformer Core Material
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.
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Magnetic and mechanical properties of molded iron particle cores
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.
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Improved systems for the measurement of hysteresis loops: DC and AC characterisation
V. Munoz,M C Martinez,V Such +2 more
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.
References
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Journal ArticleDOI
Excitation current and power loss characteristics for mitered joint power transformer cores
TL;DR: In this paper, the impact of the 45° mitered-overlap joint on the performance of large power transformer cores with respect to core loss and exciting current was investigated.
Journal ArticleDOI
Use of a voltage follower to ensure sinusoidal flux in a core
P. Sankaran,V. Kumar +1 more
TL;DR: In this paper, a circuit employing a voltage follower for obtaining a sinusoidal flux in a ferromagnetic core is described, and the amplifier just supplies the copper loss of the exciting winding.