RESEARCH OF ASYNCHRONOUS ELECTRIC DRIVE, OPTIMIZED ACCORDING TO THE CRITERION OF MAXIMIZING TORQUE-PER-AMP
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2019, Vol 183, Issue 183
Abstract
In the article the research of the work of the asynchronous electric drive on the basis of the autonomous voltage inverter with the vector control system and the AD-906U engine in the modes of its full and partial use by power on a mathematical model is software environment the MATLAB. It is shown that the characteristic |ψR|=f(Pdc) significantly affects the nature of the transition process of an asynchronous electric drive when operating at powers below nominal. Such modes are characteristic of a traction drive of an autonomous electric transport. To increase the efficiency of an asynchronous electric drive of an autonomous electric transport, it is proposed to optimize its control system according to the criterion of maximizing Torque-per-Amp relationship taking into account the characteristic |ψR|=f(Pdc). The quantitative estimation of the deviation of the engine power factor ratio when the power consumption is changed is given. Thus, at 25% of the motor power from the nominal, optimization by the criterion of maximizing Torque-per-Amp, taking into account the characteristic |ψR|=f(Pdc), allows increasing the power factor by 14% than the non-optimized asynchronous electric drive under similar conditions. When an asynchronous electric drive is operated at a power close to the nominal, optimization by the criterion of maximizing Torque-per-Amp does not significantly affect the value of the power factor, but it allows to increasing the electromagnetic torque of the motor in starting. The proposed optimization method can be applied to traction asynchronous electric drives, as well as to auxiliary drives of autonomous locomotives. This will improve the energy efficiency of the traction asynchronous electric drive of the autonomous rolling stock and reduce the cost of fuel and lubricants.
Authors and Affiliations
Dmitro Tugay, Olexandr Shkurpela
Keywords
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