Fast Switching Direct Torque Control Using a Single DC-link Current Sensor

Wei Wang; Ming Cheng; Zheng Wang; Bangfu Zhang

Fast Switching Direct Torque Control Using a Single DC-link Current Sensor

Vol. 12, No. 6, pp. 895-903, Nov. 2012

10.6113/JPE.2012.12.6.895

Direct torque control

Induction machines

Low-cost drive

Single current sensor

PDF

Abstract

This paper presents a fast switching direct torque control (FS-DTC) using only a single DC-link current sensor. In FS-DTC, six new active voltage complex space vectors (CSVs) are synthesized by the conventional active voltage space vectors (SVs). The corresponding sectors are rotated in the anticlockwise direction by 30 degrees. A selection table is defined to select the CSVs. Based on the “Different Phase Mode”, the output sequence of the selected CSV is optimized. Accordingly, a reconstruction method is proposed to acquire the phase currents. The core of the FS-DTC is that all of the three phase currents can be reliably reconstructed during every two sampling periods, which is the result of the fast switching between different phases. The errors between the reconstructed and actual currents are strictly limited in one sampling period. The FS-DTC has the advantages of the standard DTC scheme such as simple structure, quick torque response and robustness. As can be seen in the analysis, the FS-DTC can be thought of as an equivalent standard DTC scheme with 86.6% of the maximum speed, 173.2% of the torque ripple, and 115% of the response time of the torque. Based on a dSPACE DS1103 controller, the FS-DTC is implemented in an induction machine drive system. The results verify the effectiveness of the FS-DTC.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

W. Wang, M. Cheng, Z. Wang, B. Zhang, "Fast Switching Direct Torque Control Using a Single DC-link Current Sensor," Journal of Power Electronics, vol. 12, no. 6, pp. 895-903, 2012. DOI: 10.6113/JPE.2012.12.6.895.

[ACM Style]

Wei Wang, Ming Cheng, Zheng Wang, and Bangfu Zhang. 2012. Fast Switching Direct Torque Control Using a Single DC-link Current Sensor. Journal of Power Electronics, 12, 6, (2012), 895-903. DOI: 10.6113/JPE.2012.12.6.895.