Analytical determination of the electromechanical system starting process efficiency index with regard to the distributed nature of input products consumption

Development of the method for determining optimal parameters of the process of displacement of technological objects

“…Mapping a displacement operation in the form of a global model of operation allows to use, as the optimization criterion, expression EL [21], which was verified for its adequacy to the formula for the efficiency of resource use [20] ( )…”

“…pq t where rs i is the cost estimate of the unit of the i-th input product; ps j is the cost estimate of the unit of the j-th output product of displacement operation.Reducing quantitative parameters of the input and output products of the product model of the operation to comparable magnitudes makes it possible in turn to pass from a product model to determining a global model of displacement operation. In a general form, operation О f can be represented as a function of the input and a function of the output О f (re(t), pe(t))Since the distributed character of resource use and resource yield for most displacement systems, as it was substantiated in[20], can be neglected, then the global model of displacement operation can be represented as a global model of simple operation О s (RE, TO, PE), ТО=t f -t s is the duration of displacement operation. Given the above, a technical-economic model of the displacement system equipped with a d.c. motor takes the following form…”

Control of the start of high-powered electric drives with the optimization in terms of energy efficiency

“…Paper [11] represents an approach to the implementation of optimal systems controlling a start sequence independent of the started motor type. Analytical expression has been pro posed for the starting sequence efficiency index taking into consideration the whole range of starting sequence influence (i. e., power consumption, the decreased useful operating life of equipment, and extra economic risks) as well as output product by the starting sequence, and its period.…”

“…According to the data by [11], equipment deterioration during a start can be determined with the help of the expres sion…”

“…Since the timespaced nature of the resource consumption for a starting sequence (as it has been substantiated by paper [11]) may be ignored, it is possible to represent the starting se quence as the focused operation model [17] with concentrated Os(RE, ts, and PE ) parameters.…”