Multi-mode SHEPWM with low switch frequency for traction application

To eliminate current harmonics and improve voltage utilization. When traction motor was run in high speed area, a new method is proposed that solve the harmonics component is high and transition which from SPWM to SHEPWM then to six-step mode on the condition of low switch frequency. The method was introduced, principles were analyzed and formulas were derived in this paper. The validity of the proposed method has been verified by simulation and experiments. The advantages of this strategy are it not only reduced the harmonics and torque ripple but also achieved transition from SPWM to six-mode on the condition of the switch frequency. It is no more than 1 kHz.

[1]  S. K. Sahoo,et al.  A synchronized sinusoidal PWM based rotor flux oriented controlled induction motor drive for traction application , 2013, 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[2]  Joachim Holtz,et al.  Low switching frequency and high dynamic pulsewidth modulation based on field-orientation for high-power inverter drive , 1992 .

[3]  Erik Schaltz,et al.  Switching Frequency Reduction Using Model Predictive Direct Current Control for High-Power Voltage Source Inverters , 2011, IEEE Transactions on Industrial Electronics.

[4]  Saroj Kumar Sahoo,et al.  Rotor Flux-Oriented Control of Induction Motor With Synchronized Sinusoidal PWM for Traction Application , 2016, IEEE Transactions on Power Electronics.

[5]  Alan J. Watson,et al.  A Complete Harmonic Elimination Approach to DC Link Voltage Balancing for a Cascaded Multilevel Rectifier , 2007, IEEE Transactions on Industrial Electronics.

[6]  Faramarz Jabbarvaziri,et al.  Application of memetic algorithm for selective harmonic elimination in multi-level inverters , 2015 .

[7]  Lijun Diao,et al.  Optimized Design of Discrete Traction Induction Motor Model at Low-Switching Frequency , 2013 .

[8]  Shuo Wang,et al.  A Real-Time Selective Harmonic Elimination Based on a Transient-Free Inner Closed-Loop Control for Cascaded Multilevel Inverters , 2016, IEEE Transactions on Power Electronics.

[9]  Xin Qi,et al.  Optimal Control of Medium-Voltage Drives—An Overview , 2013, IEEE Transactions on Industrial Electronics.

[10]  V. Agelidis,et al.  Selective harmonic elimination pulse-width modulation seven-level cascaded H-bridge converter with optimised DC voltage levels , 2012 .

[11]  Fanghua Zhang,et al.  Selective Harmonic Elimination PWM Control Scheme on a Three-Phase Four-Leg Voltage Source Inverter , 2009, IEEE Transactions on Power Electronics.

[12]  Takafumi Koseki.  Technical trends of railway traction in the world , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[13]  B. Venu,et al.  Hybrid Selective Harmonic Elimination PWM for Common-Mode Voltage Reduction in Three-Level Neutral-Point-Clamped Inverters for Variable Speed Induction Drives , 2013 .