A comparative study of performance of AC and DC electric drive control systems with variable moment of inertia

Abstract

In electric drive control systems, the main goal is to maintain the driving motor speed to meet the mechanism’s requirements. In some practical industrial applications the mechanically-coupled load to the motor shaft has a varying mass during the system operation. Therefore, the change of mass changes the value of the moment of inertia of the system. The moment of inertia impacts the system operation, particularly the transient performance. Therefore, the variation of moment of inertia on the motor shaft during its operation creates additional challenges to accomplish a high-quality speed control. The main purpose of the current work is to study the impact of the variation of moment of inertia on the performance of both AC and DC electric drive control systems and to make a comparison between them. A mathematical analysis and simulations of the control system models had been presented; one time with three-phase induction motor and another time with DC motor, both with variable moment of inertia. A simulation of both systems had been accomplished using the Simulink software in MATLAB. The simulation results of operation of these systems have been analysed in order to get useful conclusions and recommendations for the electric drive control system designer.

Simulation-Based Analysis of Dynamics of Autonomous Electric Power Systems

“…It is impossible to completely prevent voltage sags within external power supply systems. In particular, papers [32][33][34][35] also contain simulation studies of frequency control systems for asynchronous motors, and an analytical method for analyzing the control procedures of motors and generators as part of an AEPS. These papers also investigated a formal method for solving the problem of the structural optimization of the AM control system model that could be applied to the AEPS model in this paper.…”

Speed synchronization of two DC motors with independent loads based on the higher load torque

“…Different such problems of the DC motor drive systems are presented in the papers [16], [17]. In the current years, both the induction motors and the DC motors are used in drive systems [18]- [24]. Even the synchronization of the single-phase induction motors may be met in some works [25].…”

Quantitative feedback theory based robust speed control of vector controlled induction motor

“…𝑇 𝑒 , the electromagnetic torque developed in the IM and P, number of poles[25],[26]. In the field-oriented control (FOC), to decouple flux and torque, 𝑖 𝑞𝑠 should align in the direction of total rotor flux 𝜓 𝑟 with 𝑖 𝑑𝑠 perpendicular to it.…”