CONSTRUCTION OF REGULATED POWER SUPPLY SYSTEM (30V)
ABSTRACT
Regulated power supply is an electronic circuit that is designed to provide a constant DC voltage of predetermined value across load terminals irrespective of AC mains fluctuations or load variations. 30Volt regulated power supply is produced in this research work, the major component of the regulated power supply are 15V transformer, Diode, regulator and output cord. The constructed regulator can regulate AC power supply from 230V main down to 30Volt DC supply.
CHAPTER ONE
1.0 INTRODUCTION
A power supply is a device that supplies electric power to an electrical load. The term is most commonly applied to electric power converters that converts one form of electrical energy to another, though it may also refer to devices that convert another form of energy either mechanical, solar or chemical to electrical energy. A regulated power supply is the one that controls the output voltage or current to a specific value, the controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply energy source (John et al, 2002).
Every power supply most obtain the energy it supplies to its load, as well as any energy it consumes while performing that tasks from an energy source. Depending on it’s design, a power supply may obtain energy from electrical energy transmission system, common example of this include power supplies that convert AC line voltage to DC voltage, energy storage devices such as batteries and fuel cells. Electromechanical systems such as generators and alternators, and solar power (Paul, 2006).
Regulator power supply is an electronic circuit that is designed to provide a constant DC voltage of pre-determined value across load terminals irrespective of AC mains fluctuations or load variations. A regulated power supply converts unregulated AC into constant DC with the help of a rectifier. It converts AC supply into DC supply. The function of a regulated power supply is to supply a stable voltage to a circuit or device that must be operated within certain power supply limits. The output from the regulated power supply may be alternating or unidirectional, but it is nearly always DC (Direct current) (Abbel,2004).
The type of stabilization used may be restricted to ensuring that the output remains within certain limits under various load conditions, or it may also include compensation for variations in its own supply source (Mark et al ., 200 6)
With the rapid growth of highly developed technology of instant communication, computerization, industrial automation and space exploration, the feats would not have been possible without the advent of electrical / electronics engineering. In electrical and telecommunication engineering field, systems and equipments like amplifiers, satellites, microwave link systems to name but a few depend for their correct operations upon the availability of stable well regulated d.c. power supplies. In experimental laboratories, the use of well regulated d.c. power supplies becomes inevitable because the result of these experiment depends largely on the quality power supply used.