Integral VSC and preview control of efficiency and speed of a DC drive

Abstract

This paper proposes a novel integral variable structure control (VSC) system and a preview control system to control the speed of a dc drive and obtain maximum efficiency over the whole control range. The reduced dynamic equation of the dc @DE-DC) drive system is derived based on maximum efficiency. This is done to simplify the complexity of the control system and hence to reduce the execution time of the microprocessor. An integral action is introduced into the VSC to improve the transient response, minimize the steady state tracking error and reduce the rise and settling times of the drive system. An augmented system utilizing a pure integrator (filter) is introduced into the VSC system to mitigate the input chattering problem of the drive system. A preview controller is also synthesized and implemented with the RDE-DC drive system to maximize the efficiency and control the drive speed. This controller utilizes few future values of the desired signal and disturbance signal. The desired signal is the desired drive speed while the load torque is considered as a disturbance signal. The design procedures and comparisons between the different VSC control systems are made. Matlab simulation studies are carried-out to investigate the feasibility, tracking performance and robustness of the control system with changing the speed, torque and parameters of the RDE-DC drive system.

Robust speed synchronization control for clutchless automated manual transmission systems in electric vehicles

“…During the gear-shifting process, as the target speed value can be obtained from the transmission control unit (TCU) in advance, the preview feedforward controller can be utilized in speed synchronization, which is considered as a supplementary way for improving the transient response of the system. 12 For conventional speed synchronization control, a proportional-integral (PI) controller or PI cascade controller with two control loops (i.e. an outer speed loop and an inner current loop) is often utilized.…”

Optimal speed synchronization control for clutchless AMT systems in electric vehicles with preview actions

“…In the gear shifting process, the target speed value can be obtained from the transmission control unit (TCU) in advance. So the preview feed-forward controller can be utilized in the speed synchronization for improving the system transient response [11]. In the conventional speed synchronization control, the PI controllers or the PI cascade controllers including two control loops, i.e., outer speed loop and inner current loop, are often employed [12].…”

Study on Control of Brushless DC Motor for Electric Vehicle

“…For electronic commutation replaced mechanical commutation, BLDCM not only has good performance of speed adjustment like brush DC motor, but also has the advantages of small volume and convenient maintenance [1]. In recent years, the latest achievements of power electronic technology, microelectronics technology, microcomputer, rare earth permanent magnet material, new control theory, and motor theoretical aspects have further promoted the application domain of BLDCM [2,3]. Based on the analysis of the basic principle of BLDCM, the fuzzy-PID control of BLDCM was studied in this paper.…”