TY - GEN
T1 - Novel SVPWM switching pattern for high efficiency 15KW current-fed quasi-Z-source inverter in HEV motor drive application
AU - Lei, Qin
AU - Cao, Dong
AU - Peng, Fang Z.
PY - 2012/4/30
Y1 - 2012/4/30
N2 - The recently proposed current-fed QZSI[1] can buck and boost voltage and provide bidirectional power flow[2-6]. A crucial criterion for the size of three phase PWM converters is the cooling of the power semiconductors and thus determination of power dissipation at certain operating points. In the modified SVPWM control method for this circuit, different PWM sequences can lead to different switching loss, current ripple, total harmonic distortion, and also the voltage spike on the switching devices. In order to select the best PWM sequence to obtain the best performance and efficiency, A complete analysis and calculation for the four mentioned criterions are presented for different sequences. For each criterion, the best sequences are selected to obtain better performance. Finally, the optimized PWM sequence in the modified SVPWM control for this circuit is selected with the optimized hardware design together to achieve the best efficiency at full operation range. The optimized hardware design has been built in the lab, including the optimal design of the coupled inductor, optimal design and selection of Z-source capacitors and output capacitors, the selection of Z-source diode, and the final layout of the hardware. In order to bring the prototype into real application in hybrid electrical vehicle[3], the inverter efficiency is measured according to the motor P-V curve. The estimated efficiency curve and experiment results are plot and compared. The best efficiency at 15kW reaches 97.6% at unity voltage gain.
AB - The recently proposed current-fed QZSI[1] can buck and boost voltage and provide bidirectional power flow[2-6]. A crucial criterion for the size of three phase PWM converters is the cooling of the power semiconductors and thus determination of power dissipation at certain operating points. In the modified SVPWM control method for this circuit, different PWM sequences can lead to different switching loss, current ripple, total harmonic distortion, and also the voltage spike on the switching devices. In order to select the best PWM sequence to obtain the best performance and efficiency, A complete analysis and calculation for the four mentioned criterions are presented for different sequences. For each criterion, the best sequences are selected to obtain better performance. Finally, the optimized PWM sequence in the modified SVPWM control for this circuit is selected with the optimized hardware design together to achieve the best efficiency at full operation range. The optimized hardware design has been built in the lab, including the optimal design of the coupled inductor, optimal design and selection of Z-source capacitors and output capacitors, the selection of Z-source diode, and the final layout of the hardware. In order to bring the prototype into real application in hybrid electrical vehicle[3], the inverter efficiency is measured according to the motor P-V curve. The estimated efficiency curve and experiment results are plot and compared. The best efficiency at 15kW reaches 97.6% at unity voltage gain.
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U2 - 10.1109/APEC.2012.6166160
DO - 10.1109/APEC.2012.6166160
M3 - Conference contribution
AN - SCOPUS:84860147594
SN - 9781457712159
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 2407
EP - 2420
BT - APEC 2012 - 27th Annual IEEE Applied Power Electronics Conference and Exposition
T2 - 27th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2012
Y2 - 5 February 2012 through 9 February 2012
ER -