CONTROL AND MODELING PARAMETERS FOR HEAT DIAGNOSTICS OF POWER ELECTRI-CAL EQUIPMENT FAILURE
Array
Keywords:
transport, power equipment, modeling, diagnostics, remote control, modulator.Abstract
It has been considered the heat processes of traction electric engines parts in the maintenance and possible ways of heat generation modeling, which intensity is interconnected with operating physical quantities and possible components failure of traction electric drives in urban electric transport.
The reasonable choice of input parameters, which control is possible with the help of remote techniques, located outside the mobile vehicle, was used in the development of pilot plant. By means of experimental equipment set containing electromechanical device in the form of a traction drive and brake, means for setting, regulation and control of technological input values and experimental device for measuring heating temperature electric engine with a given accuracy, it was realized the prepared experiment plan, implemented the variation of thermal processes in possible duty cycles of traction power equipment occurring on real urban routes.
By means of differential electronic transducer “temperature-frequency” (T–F), the results of changing output ordinate were recorded and used in polynomial modeling of heating process in electric engine. The regression second order model, describing the thermal process, a spectral analyzer for record and visual control of output ordinate, were used for studying heat generation in laboratory-like environments and for evaluating the possibility of using standard and experimental control device for real traction substations of urban electric transport during remote technical diagnostics equipment according to its heating temperature. Using experimental differential electronic transducer T–F with a modulator and short mathematical description of heating process of traction electric drive allow to identify thermal processes with using of computing tools, which are different in few resources.
It has been considered hardware-based ways to achieve the desired measuring set accuracy of the output ordinate and a program solution variant of the spectral low-frequency signal analyzer, which realization is possible by means of popular microcontrollers.
The results have confirmed the appropriateness of studying thermal processes in electrical equipment and devices for synthesis of local compact remote equipment, which allows to create technical diagnostics devices and neural networks for possible failures evaluation, determined by the heat gradient in parts of power equipment of urban electric vehicles, operated on various routes and in different conditions.
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