Publication Date : 01/08/2012

Author(s) :


Volume/Issue :
Volume 7
Issue 1
(08 - 2012)

Abstract :

The DC generator developed provides 12V power supply from a designed and constructed system consisting of a fabricated stationary bicycle, refurbished automotive alternator, a six diode rectifier and a 12V DC regulator. The alternator is driven by the rear wheel of a stationary bicycle through a V-belt to generate a 3-phase voltage that is then rectified by a three phase (six diodes) rectifier. The output voltage from the three phase rectifier was subsequently passed through a 7812 integrated circuit (IC) regulator for supplying a stable 12V supply. The system developed is intended to be used in fitness centres, where it will be used for physical exercise as well as a small DC generator. The performance of the generator was tested at open circuit voltage levels and at load test levels. The final result shows that using an excitation current of 1.22A, a regulated output of 12V could be obtained. The system developed and presented in this work can serve as an alternative source of power generation which can be used to charge hand set, batteries and for demonstration in laboratory to help the students understand generator principles.

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