Experimental study on the effect of alternator speed to the car charging system

Abstract

Abstract. In this paper, we present our work, which is doing an energy audit on alternator's current output and battery's voltage based on alternator speed. Up until today, the demand for power in automobile is ever increasing. As technology advances, more and more electrical devices were produced and being installed in vehicles. To cope with the demand, alternator has been designed and modified so that it can produce enough power. This research is to study the effect of alternator speed to the charging system. The car used in this experiment is Proton Preve 1.6 Manual. In both ISO 8854 and SAE J 56, alternator testing and labelling standards indicate that the rated output an alternator is the amount of current that it is capable of producing at 6,000 RPM. Three different constant speed of engine which is 750 RPM as idle speed, 1500 RPM and 3000 RPM as cruise speed were taken as parameter. The speed of the alternator was measured using tachometer, digital multi-meter was used to measure battery's voltage, and AC/DC Clamp was used to measure alternator current output. The result shows that the faster the alternator spin, the more power it can produce. And when there is more power, the faster the charging rate of the battery.

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“…Physical changes are also monitored. Several studies have utilized similar tests in coating analysis and they went by different names such as direct flame test, [ 29 ] direct flame resistant test, [ 28 ] fire‐resistant test, [ 27 ] and Bunsen burner test. [ 31,35 ] Despite factors such as air interference and flame instability (as the cannister is running out of fuel gas) affecting the outcome, the test still gives a good indicator on specimen's flame resistance.…”

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“…The potential possibility to generate electric power at alternator rotation with different speeds is based on the current and speed characteristics of the alternator (Fig. 2) [5][6][7][8].…”

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“…For charging capability, it requires sufficient rotational of the alternator shaft, N at more than 2000 RPM [9], 1200 RPM [10], 1070 RPM [11] and 1400 RPM [12] to cause the lamp is off (when the switch is on), which notified the charging voltage is higher than battery voltage is ongoing from alternator to battery as shown in Figure 5c. Conversely, if the lamp in Figure 5d is on (when the switch is on), it indicating that no electrical power produce from the alternator to the battery via the indicator lamp when insufficient alternator speed below than their minimum speed.…”