BOX, the electric current ballast for automobile, why is it necessary?
In general, engine of a vehicle is driven by using power supplied from battery. Driving of this engine rotates alternator to generate electric power. It is then supplied to electric devices to require power, such as battery, distributor, lighting devices, horn, wipers and AV system, etc. In automobile system with the above configuration, alternator is generally designed to produce the output of 13.6V ~ 14.5V in a passenger vehicle. To maintain app. 12V of battery charge, the min. of 13.6V ~ 14.5V of voltage must be maintained. However, the maximum voltage of a car battery is only app. 12.4V~ 12.7V even when there is no load. The voltage becomes lowered when additional electric loads are applied, such as for heater or lighting devices, etc. Continuation of such low-charged state rapidly reduces the lifespan of battery and, accordingly, deteriorates engine efficiency of the automobile. Automobiles become frequently subject to lighting load to cause overflow as current higher than the rat
