Instrumentation Geophysics: Design and Construction of a DC Variable Power Supply

Onuorah, Loretta O. and Nwozor, K.K (2014) Instrumentation Geophysics: Design and Construction of a DC Variable Power Supply. International Journal of Instrumentation Science, 3 (2). pp. 13-16. ISSN http://10.5923/j.instrument.20140302.01

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Abstract

This work demonstrates the design and implementation of a 3, 6, 9, 12 and 24 Volts switching mode power supply system that replaces battery as a major source of direct current (DC) voltage for electronic equipment that can be used to energize electrodes, in geophysics field work that involves electrical resistivity surveys, seismographic and magneto-telluric surveys. The switching mode output of a variable power supply system produces direct voltages of 3, 6, 9, 12, and 24 Volts that are selected by a multi-output switch. These voltages are stepped down from a 220 Volt alternating current (AC) main terminal by an auto (variable taps) transformer and thereafter rectified and smoothened. This smoothing process by a bridge rectifier converts AC to direct current (DC) and filters off the associated impurities and ripples. The capacitor used for each stage has the rating of 2200microfarad (μf) and 35Volts.

Item Type: Article
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Natural and Applied Sciences
Depositing User: miss ifeoma agbo
Date Deposited: 02 May 2019 13:47
Last Modified: 02 May 2019 13:47
URI: http://eprints.gouni.edu.ng/id/eprint/1430

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