Design of control system for city electric transport converter

The study is aimed at developing an adaptive scalar control system for a frequency converter that controls asynchronous electric machines used in urban electric transport. The developed system includes classical scalar control in its structure, but allows maintaining optimal operating modes of the electric motor in a wide range of input supply voltage (250–800 V) by limiting the nominal rotation frequency and adding a multiplication factor to change the PWM pulse duration. The article uses methods of full-scale testing and structural analysis. Oscillograms of the model and prototype of the converter with an implemented adaptive control system at a PWM frequency of 2 kHz with a change in the input supply voltage are given. Mathematical modeling and experimental studies confirmed the operability and efficiency of the developed control system.

Authors: N. K. Tretiakov, V. E. Kuznetsov, D. N. Koksharov, P. V. Rene

Direction: Electrical Engineering

Keywords: converter, scalar control, voltage, PWM, duty cycle, adaptive control

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