**10. References**


Glab (Morawiec) M.; Krzeminski Z.; Lewicki A., Multiscalar control of induction machine supplied by current source inverter, *PCIM 2007, Nuremberg* 2007.

**Chapter 19** 

© 2012 Bouchhida et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 Bouchhida et al., licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

**Minimizing Torque-Ripple** 

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/37883

**1. Introduction** 

**in Inverter-Fed Induction Motor** 

**Using Harmonic Elimination PWM Technique** 

Ouahid Bouchhida, Mohamed Seghir Boucherit and Abederrezzek Cherifi

Vector control has been widely used for the high-performance drive of the induction motor. As in DC motor, torque control of the induction motor is achieved by controlling torque and flux components independently. Vector control techniques can be separated into two categories: direct and indirect flux vector orientation control schemes. For direct control methods, the flux vector is obtained by using stator terminal quantities, while indirect

The overall performance of field-oriented-controlled induction motor drive systems is directly related to the performance of current control. Therefore, decoupling the control scheme is required by compensation of the coupling effect between q-axis and d-axis current

The PWM is the interface between the control block of the electrical drive and its associated electrical motor (fig.1). This function controls the voltage or the current inverter (VSI or CSI) of the drive. The performance of the system is influenced by the PWM that becomes therefore an essential element of the system. A few problems of our days concerning the variable speed system are related to the conventional PWM: inverter switching losses,

Harmonic elimination and control in inverter applications have been researched since the early 1960's (Bouchhida et al., 2007, 2008; Czarkowski et al., 2002; García et al., 2003; Meghriche et al., 2004, 2005; Villarreal-Ortiz et al., 2005; Wells et al., 2004). The majority of these papers consider the harmonic elimination problem in the context of either a balanced connected load or a single phase inverter application. Typically, many papers have focused

methods use the machine slip frequency to achieve field orientation.

dynamics (Jung et al., 1999; Lin et al., 2000; Suwankawin et al., 2002).

acoustical noise, and voltages harmonics (fig.2).


Ouahid Bouchhida, Mohamed Seghir Boucherit and Abederrezzek Cherifi

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/37883
