**Author details**

484 Induction Motors – Modelling and Control

switching frequency

Swtching frequency

**7. Conclusion** 

Moreover, as shown in Figure 17, the experimental switching frequency of the proposed PCPWM inverter is very less compared to the conventional PWM inverter one Figure 18. As a consequence, the proposed inverter provides higher dynamic response than the

> 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 t(s)

0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 t(s)

A three-phase inverter model was developed by combining pre-calculated switching angles and a passive filter to eliminate inverter output harmonics. The inverter model needs a nonlinear system of equations for the switching angles computation. The proposed inverter model succeeds to substantially reduce the harmonics while using polarized capacitors. The reduced number of switching angles provides more reliability and increases system components life time. Moreover, the proposed inverter design and control simplicity could be used as a cost effective solution to harmonics reduction problem. The torque ripple of the induction motor is dramatically reduced by the PCPWM inverter. The global scheme of the experimental setup has been implemented. The obtained experimental results exhibit good matching with the theoretical values. It is shown that the proposed PCPWM has better

conventional PWM inverter in vector controlled induction motor applications.

**Figure 17.** Experimental switching frequency for proposed PCPWM inverters

**Figure 18.** Experimental switching frequency for conventional PWM inverters

tracking performance as compared with the conventional PWM.

Ouahid Bouchhida *Université Docteur Yahia Farès de Médéa, Département Génie Electrique, Algérie* 

Mohamed Seghir Boucherit *Ecole Nationale Polytechnique, Département Génie Electrique, Algérie* 

Abederrezzek Cherifi *IUT Mantes-en-Yvelines, France* 
