Bus-Clamping-Based DTC: An Attempt to Reduce Harmonic Distortion and Switching Losses

This paper deals with a new direct torque control (DTC) strategy based on the bus-clamping technique dedicated to induction motor drives. The proposed strategy consists in the synthesis of two vector selection tables suitably arranged considering the bus-clamping technique. Such synthesis depends on the rotation direction of the stator flux vector. The resulting DTC strategy leads to clamp each motor phase during 60° interval in every half cycle of the reference stator flux vector. Therefore, a reduction of the inverter switching losses is gained. Furthermore, it has been found that the proposed DTC strategy offers a lower harmonic distortion of the motor phase currents and a higher capability to operate at low levels of the dc-bus voltage, which could be of interest for electric vehicle (EV) and hybrid electric vehicle (HEV) applications. These performances are confirmed by simulation and validated by experiments.

[1]  Toshihiko Noguchi,et al.  A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor , 1986, IEEE Transactions on Industry Applications.

[2]  O. A. Mahgoub,et al.  Implementation of a new fast direct torque control algorithm for induction motor drives , 2010 .

[3]  Jafar Soltani,et al.  Adaptive Nonlinear Direct Torque Control of Sensorless IM Drives With Efficiency Optimization , 2010, IEEE Transactions on Industrial Electronics.

[4]  G. Narayanan,et al.  Harmonic Analysis of Advanced Bus-Clamping PWM Techniques , 2009, IEEE Transactions on Power Electronics.

[5]  Sergio L. Toral Marín,et al.  Comparative Analysis of Discontinuous and Continuous PWM Techniques in VSI-Fed Five-Phase Induction Motor , 2011, IEEE Transactions on Industrial Electronics.

[6]  Di Zhao,et al.  Advanced bus-clamping PWM techniques based on space vector approach , 2006, IEEE Transactions on Power Electronics.

[7]  Bhim Singh,et al.  A novel approach to minimize torque ripples in DTC induction motor drive , 2010, 2010 International Conference on Power, Control and Embedded Systems.

[8]  G. Narayanan,et al.  Novel Switching Sequences for a Space-Vector-Modulated Three-Level Inverter , 2012, IEEE Transactions on Industrial Electronics.

[9]  T. Brahmananda Reddy,et al.  Switching loss characteristics of advanced DPWM methods using space vector based double switching clamping sequences , 2009, 2009 IEEE Symposium on Industrial Electronics & Applications.

[10]  Abdul Ahad,et al.  NOVEL DIRECT TORQUE CONTROL BASED ON SPACE VECTOR MODULATION WITH ADAPTIVE STATOR FLUX OBSERVER FOR INDUCTION MOTORS , 2014 .

[11]  T. Sutikno,et al.  An Optimized Switching Strategy for Quick Dynamic Torque Control in DTC-Hysteresis-Based Induction Machines , 2011, IEEE Transactions on Industrial Electronics.

[12]  M. P. Kazmierkowski,et al.  Fast Direct Torque Control of an Open-End Induction Motor Drive Using 12-Sided Polygonal Voltage Space Vectors , 2012, IEEE Transactions on Power Electronics.

[13]  Hiralal M. Suryawanshi,et al.  Three-Dimensional Space-Vector Modulation to Reduce Common-Mode Voltage for Multilevel Inverter , 2010, IEEE Transactions on Industrial Electronics.

[14]  G. Narayanan,et al.  Reduction of Torque Ripple in Induction Motor Drives Using an Advanced Hybrid PWM Technique , 2010, IEEE Transactions on Industrial Electronics.

[15]  Ming-Ji Yang,et al.  Global Minimum Torque Ripple Design for Direct Torque Control of Induction Motor Drives , 2010, IEEE Transactions on Industrial Electronics.

[16]  M.V.R. Rao,et al.  Space vector Pulse width modulation control of induction motor , 2007 .

[17]  T. Sutikno,et al.  Simple Dynamic Overmodulation Strategy for Fast Torque Control in DTC of Induction Machines with Constant Switching Frequency Controller , 2010, 2010 IEEE Industry Applications Society Annual Meeting.

[18]  Yongchang Zhang,et al.  A Novel Duty Cycle Control Strategy to Reduce Both Torque and Flux Ripples for DTC of Permanent Magnet Synchronous Motor Drives With Switching Frequency Reduction , 2011, IEEE Transactions on Power Electronics.

[19]  Ahmed Masmoudi,et al.  Investigation of the performance of a DTC strategy dedicated to the control of B4 fed induction motor drives , 2011 .

[20]  Frede Blaabjerg,et al.  An Improved DTC-SVM Method for Sensorless Matrix Converter Drives Using an Overmodulation Strategy and a Simple Nonlinearity Compensation , 2007, IEEE Transactions on Industrial Electronics.

[21]  Yongchang Zhang,et al.  A Simple Method to Reduce Torque Ripple in Direct Torque-Controlled Permanent-Magnet Synchronous Motor by Using Vectors With Variable Amplitude and Angle , 2011, IEEE Transactions on Industrial Electronics.

[22]  B. Gavaskar Reddy,et al.  Hybrid Cascaded H-Bridge Multilevel-Inverter Induction-Motor-Drive Direct Torque Control for Automotive Applications , 2012 .

[23]  John E. Fletcher,et al.  Low-Speed Control Improvements for a Two-Level Five-Phase Inverter-Fed Induction Machine Using Classic Direct Torque Control , 2011, IEEE Transactions on Industrial Electronics.