By Milenko Braunovic
Different factors impact the functionality of electric contacts, together with tribological, mechanical, electric, and fabrics elements. even supposing those behaviors were studied for a few years, they aren't typical or understood in perform. Combining methods used around the globe, electric Contacts: basics, purposes, and expertise integrates advances in examine and improvement within the tribological, fabric, and analytical features of electric contacts with new facts on electric present move on the micro- and nanoscales.
Taking an application-oriented process, the authors illustrate how fabric features, tribological habit, and loading impression the degradation of contacts, formation of intermetallics, and total reliability and function. assurance is split generally into 3 sections, with the 1st inquisitive about mechanics, tribology, fabrics, present and warmth move, and easy reliability problems with electric contacts. the subsequent part explores functions, reminiscent of energy connections, digital connections, and sliding contacts, whereas the ultimate part provides the diagnostic and tracking suggestions used to enquire and degree phenomena happening at electric touch interfaces. quite a few references to present literature mirror the truth that this booklet is the main complete survey within the field.
Explore a magnificent choice of info, thought, and sensible purposes in electric Contacts: basics, functions, and expertise, a severe device for an individual investigating or designing electric apparatus with better functionality and reliability in brain.
Read Online or Download Electrical Contacts: Fundamentals, Applications and Technology (Electrical and Computer Engineering) PDF
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Additional info for Electrical Contacts: Fundamentals, Applications and Technology (Electrical and Computer Engineering)
Joffe ascribed this effect to a water film on the solid surface, assuming that the water heals surface microcracks. This circumstance holds significance in tribological behavior of materials for which Joffe’s effect takes place. For example, aluminum oxide is sensitive to water vapor, and high-strength steel exposed in pure hydrogen is sensitive to a small concentration of oxygen. 1). This phenomenon was first observed by P. Rebinder. ) and are present in lubricants. The adsorbed film may have the opposite effect, producing surface hardening.
1=2 ! a axÃ2 1 Ã ; exp K ! 9) where xÃ1 Z x1 =m1=2 0 is the dimensionless height of summit; a Z m0m4/m22 is the bandwidth parameter; C1 Z a/(2aK3). This equation is termed Nayak’s distribution. 14 The distribution p depends on the spectral moments only in some dimensionless combination a that can be determined from the surface profilogram. The bandwidth parameter a is associated with the width of the surface spectral density. , the band of wavelengths making up the given surface is wider.
21 Image processing procedure for separation of roughness scale levels: (a) Z (b)C(c), where (a) is an initial image, (b) is its long-wave component, and (c) is the subroughness image. 21c). Parameters for the sub-microrelief were determined on the basis of the subroughness image. 21c) and that measured by Talystep on the same sample provides good indirect evidence that the above procedure is acceptable. For considering the effect of irregularities in two levels on contact characteristics, the model of discrete contact was developed.