STUDY OF UNEVENNESS HEIGHT DISTRIBUTION FOR GRAPHITE PANTOGRAPH CONTACT STRIP
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
An assumption of data distribution is of great importance because in many cases it determines the method that ought to be used to estimate the unknown parameters in the model. In this paper we performed a study of unevenness height distribution for three graphite plates, with different wear degree, used as pantograph contact strips. Using roughness diagram we determined the height, number of asperities and statistical values. With Kolmogorov test we verify the unevenness height distribution for two cases: exponential and normal distribution. We assumed a theoretical repartition, which is compared with empirical repartition. The obtain values for random variable are compared to verify the hypothesis assumed. Then we verify the equality of variance with Fischer-Snedecor test and the equality of mean with Student test for two probes which have the same repartiton. The study results of unevenness for three graphite plates used as pantograph contact strips, based on roughness diagram, let to conclusion that the unevenness height distribution vary with degree of wear.
Authors and Affiliations
Constantin-Florin OCOLEANU, Gheorghe MANOLEA, Grigore CIVIDJIAN, Alin-Iulian DOLAN
Keywords
Related Articles
- EP ID EP107967
- DOI -
- Views 142
- Downloads 0
STATIC VOLTAGE SOURCE USE TO SUPPLY PARTIAL DISCHARGE MEASURING CIRCUITS AT INSTRUMENT TRANSFORMERS
The paper presents the implications of static voltage source use in the partial discharge (PD) measuring circuit at instrument transformers. The economic advantages deriving from the use of such sources must be correlate...
Design and Simulation of Wireless Power Transfer Systems
This paper presents a set of diagrams for wireless power transfer systems (WPTS) with a lot of applications in key domains such as: medical, electrical engineering, military etc. Our research is based on circuits working...
Controller for BLDC Motors
In this paper it is presented a comprehensive design of a dedicated controller for BLDC motor with maximal electric power around 1000W. That controller is a new product in testing stage and it uses high-end components to...
Supply voltage and resistant torque influence on dynamic characteristics of reluctance synhronous motors
The reluctance synchronous motors, as well as the synchronous permanent magnet motors, are the best solution from technical and economic point of view, for low and middle powers. This paper presents a series of simulatio...
CONCEPTS FOR ERROR MODELING OF MINIATURE ACCELEROMETERS USED IN INERTIAL NAVIGATION SYSTEMS
The paper is a study of the error models for the acceleration sensors used in the strap-down inertial navigation systems. Two categories of errors models, presented in the literature, are described: IEEE standardized mod...