**Author details**

Pedro Melo *Polytechnic Institute of Porto, Portugal* 

Ricardo de Castro and Rui Esteves Araújo *Faculty of Engineering – University of Porto, Portugal* 

## **7. References**

Bazzi, A., & Krein, P. (2010). Review of Methods for Real-Time Loss Minimization in Induction Machines. *IEEE Transactions on Industrial Applications,* Vol.41, No.6, pp. 2319- 2328.

**Chapter 18** 

© 2012 Morawiec, 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 Morawiec, 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.

**Sensorless Control of Induction Motor Supplied** 

The circuits used for power conversion applied in drives with induction motor (IM) are classified into two groups: voltage source inverters (VSI) and current source inverters (CSI). The VSI were used more often than the CSI because of their better properties. Nowadays, the development of power electronics devices has enormous influence on applications of

In the 1980s the current source inverters were the main commonly used electric machine feeding devices. Characteristic features of those drives were the motor electromagnetic torque pulsations, the voltage and current with large content of higher harmonics. The current source inverter was constructed of a thyristor bridge and large inductance and large commutation capacitors. Serious problems in such drive systems were unavoidable overvoltage cases during the thyristor commutation, as the current source inverter current is supplied in a cycle from a dc-link circuit to the machine phase winding. The thyristor CSI has been replaced by the transistor reverse blocking IGBT devices (RBIGBT), where the diode is series-connected and placed in one casing with transistor. The power transistors like RBIGBT or Silicon Carbide (SiC) used in the modern CSIs guarantee superior static and

The electric drive development trends are focused on the high quality system. The use of current sources for the electric machine control ensures better drive properties than in case of voltage sources, where it may be necessary to use an additional passive filter at the inverter output. The Pulse width modulation (PWM) with properly chosen dc-link inductor and input-output capacitors result in sinusoidal inverter output currents and voltages. Methods of calculating proper inductance in dc-link were proposed in [Glab (Morawiec) M. et. al., 2005, Klonne A. & Fuchs W.F., 2003, 2004]. Properties of dc-link circuit of the Current Source Converter (CSC) force the utilization of two fully-controlled inverters to supply

**by Current Source Inverter** 

Additional information is available at the end of the chapter

systems based on the CSI and creates new possibilities.

Marcin Morawiec

**1. Introduction** 

http://dx.doi.org/10.5772/51133

dynamic drive characteristics.


Marcin Morawiec

426 Induction Motors – Modelling and Control

Vol.41, No.5, pp. 533-539.

Hall, ISBN 13: 978-0130910141.

Oxford, ISBN 9780198564393.

*Technology*, Vol.55, No.6, pp. 1756-1764.

*Industrial Applications,* Vol.36, No.3, pp. 755-763.

Laboratory –Swiss Federal Institute of Technology Zurich.

*Proceedings - Electric Power Applications,* Vol.151, No.4, pp. 385-397.

Bazzi, A., & Krein, P. (2010). Review of Methods for Real-Time Loss Minimization in Induction Machines. *IEEE Transactions on Industrial Applications,* Vol.41, No.6, pp. 2319-

Fernandez-Bernal, F., Garcia-Cerrada, A., & Faure, R. (2000). Model-based loss minimization for DC and AC vector-controlled motors including core saturation. *IEEE Transactions on* 

Garcia, G., Luis, J., Stephan, R., & Watanabe, E. (1994). An efficient controller for an adjustable speed induction motor drive. *IEEE Transactions on Industrial Electronics*,

Guzzella, L., & Amstutz, A. (2005), *The QSS Toolbox Manual*, Measurement and Control

Kioskeridis, I., & Margaris, N. (1996). Loss minimization in induction motor adjustablespeed drives. *IEEE Transactions on Industrial Electronics,* Vol.43, No.1, pp. 226-231. Krishnan, R. (2001). *Electric Motor Drives – Modeling, Analysis and Control* (1 edition), Prentice

Lim, S. and K. Nam (2004). Loss-minimising control scheme for induction motors. I*EE* 

Novotny, D., Lipo, T. (1996). *Vector control and dynamics of AC drives,* Clarendon Press,

Zeraoulia, M., M. E. H. Benbouzid, et al. (2006). Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study. *IEEE Transactions on Vehicular* 

**7. References** 

2328.

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/51133
