Method of Direct Torque Control for three-level Voltage Inverter

This paper presents a new Method of control based on Direct Torque Control (DTC) strategy. This method is designed to be applied in the control of Induction Motors (IM) fed with a three-level Voltage Source Inverter (VSI). This type of inverter has several advantages in comparison with standard two-level VSI, such as a greater number of levels in the output voltage waveforms, lower dV/dt, less harmonic distortion in voltage and current waveforms and lower switching frequencies. In the new method, torque and stator flux errors are used together with the stator flux angular frequency to generate a reference voltage vector. Further, practical application and operation of designed converters are documented on experimental results.

[1]  Bimal K. Bose,et al.  Modern Power Electronics and AC Drives , 2001 .

[2]  M. Kuchar,et al.  Estimation Techniques for Sensorless Speed Control of Induction Motor Drive , 2006, 2006 IEEE International Symposium on Industrial Electronics.

[3]  P. Spanik,et al.  Zero-Voltage and Zero-Current Switching Full-Bridge DC–DC Converter With Auxiliary Transformer , 2006, IEEE Transactions on Power Electronics.

[4]  H.L. Liu,et al.  Three-level space vector PWM in low index modulation region avoiding narrow pulse problem , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[5]  P. Brandstetter,et al.  Rotor time constant adaptation using Radial Basis Function network , 2008, 2008 13th International Power Electronics and Motion Control Conference.

[6]  J. P. Félix.  Modulation and control of three-phase PWM multilevel converters , 2002 .