asokatechnologies@gmail.com 09347143789/09949240245

Search This Blog

Tuesday, 13 July 2021

Power optimisation scheme of induction motor using FLC for electric vehicle

ABSTRACT:

In electric vehicles (EVs) and hybrid EVs, energy efficiency is essential where the energy storage is limited. Adding to its high stability and low cost, the induction motor efficiency improves with loss minimisation. Also, it can consume more power than the actual need to perform its working when it is operating in less than full load condition. This study proposes a control strategy based on the fuzzy logic control (FLC) for EV applications. FLC controller can improve the starting current amplitude and saves more power. Through the MATLAB/SIMULINK software package, the performance of this control was verified through simulation. As compared with the conventional proportional integral derivative controller, the simulation schemes show good, high-performance results in time-domain response and rapid rejection of system-affected disturbance. Therefore, the core losses of the induction motor are greatly reduced, and in this way improves the efficiency of the driving system. Finally, the suggested control system is validated by the experimental results obtained in the authors’ laboratory, which are in good agreement with the simulation results.

SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

When IM operates in less than full load condition, it can consume more power than needed. This excess power is in the form of heat. By using the FLC the starting current amplitude can be controlled and more power can be saved during this time. The inputs of the fuzzy controller are the error of speed and change of error which are used in the outer loop for producing an equivalent controller term. In this paper, a simulation study was conducted on a 50 hp IM-driven EV. Different performance indicators are tested such as peak overshoot, steady-state error, rise time, and settling time. The results showed that the phase current in the suggested system includes fewer loss components (less amplitude) with the same order components. The amplitudes of loss are reduced on the average for the actual torque in the steady state. It achieves a smooth torque and improves system performance. The simulation results of the suggested FLC scheme showed very good stability and better performance over the conventional PID controller in rising time, settling time, and peak overshoot. The proposed control system is validated by the experimental results which are in good agreement with the simulation results.

REFERENCES:                                         

[1] Sato, E.: ‘Permanent magnet synchronous motor drives for hybrid electric vehicles’, IEEJ Trans. Electr. Electron. Eng., 2007, 2, (2), pp. 162–168

[2] Agency, I.E.: ‘Global EV outlook 2016: beyond one million electric cars’ (OECD Publishing)

[3] Sayed, K.: ‘Zero-voltage soft-switching DC-DC converter-based charger for LV battery in hybrid electric vehicles’, IET Power Electron., 2019, 12, (13), pp. 3389–3396

[4] Gomez, J.C., Morcos, M.M.: ‘Impact of EV battery chargers on the power quality of distribution systems’, IEEE Power Eng. Rev., 2002, 22, (10), pp. 63–63

[5] Stephan, C.H., Sullivan, J.: ‘Environmental and energy implications of plug in hybrid-electric vehicles’, Environ. Sci. Technol., 2008, 42, (4), pp. 1185– 1190