DOI: 10.25198/2077-7175-2019-7-129
ASSESSMENT OF PARAMETERS OF OPERABILITY OF INDUCTOR ALTERNATORS OF AUTOMOBILES
А.V. Puzakov1, О.V. Yusupova2
Orenburg State University, Orenburg, Russia
1e-mail: and-rew78@yandex.ru
2e-mail: yusupova_olesya@bk.ru
Abstract. The relevance of a problem of diagnosing of alternators is caused by insufficient informational content of the existing diagnosing methods. Automobiles can be equipped with inductor alternators, in which mainly electrical failures occur. Modern research is devoted to the consideration of rectifier block faults, while insufficient attention has been paid to faults in the windings of inductor alternators. The purpose of the article is to increase the information content of diagnosing inductor alternators based on the joint use of two diagnostic parameters: temperature and output voltage. The leading method to the study of this problem is the physical modeling of faults (open and short circuit of the field winding, open stator phase, inter-turn short circuit of the stator phase, interphase short circuit of the stator winding, short circuit of the stator phase to the housing) by forcibly increasing (decreasing) the electrical resistance of the windings of the inductor alternator. To determine the temperature of the alternator, it was brought to a steady thermal state for 20 minutes. Physical modeling made it possible to establish the boundaries of the occurrence and development of electrical faults in the values of structural and diagnostic parameters. It was established that the temperature of the alternator in the event of malfunctions can exceed the normative by 10–15 ° C, and the output voltage can drop to 7–9 Volt when the alternator is running without load. To assess the service life of inductor alternators, the degree of working capacity was used, due to the difference between the current and limit values of the diagnostic parameter. The final assessment of the alternator’s performance is the arithmetic average of two diagnostic parameters. Changing the output voltage has a greater effect on changing the degree of operability of the inductor alternator. As the temperature rise increases and the output voltage decreases, the degree of operability decreases, indicating the occurrence of faults of the inductor alternator. The scientific novelty can be considered experimentally valid patterns that reflect the relationship between the structural and diagnostic parameters of inductor alternators. The practical significance of the research is to increase the reliability of diagnosis of inductor alternators and the efficiency of automobile operation by reducing downtime in repairs. Further studies will allow to consider the remaining faults of inductor alternators and develop practical recommendations for the implementation of the proposed diagnostic method.
Keywords: inductor alternator, physical simulation of faults, degree of operability, alternator temperature, output voltage, automobiles.
Cite as: Puzakov, А.V., Yusupova, О.V (2019) [Assessment of parameters of operability of inductor alternators of automobiles]. Intellekt. Innovatsi. Investitsii [Intellect. Innovation. Investments]. Vol. 7, pp. 129-137.
