Toh, C. L. and Idris, N. R. N. and Yatim, A. H. M. (2005) Constant and high switching frequency torque controller for DTC drives. IEEE, Power Electronics Letters, 3 (2). pp. 76-80. ISSN 1540-7985
The letter presents a new method of increasing the switching frequency of a direct torque control (DTC) of induction machines. The method simply replaces the hysteresis comparator of the conventional DTC drives with a triangular waveform-based constant switching frequency controller. By synchronizing the digital signal processor (DSP) sampling with a triangular waveform and with an appropriate systematic controller design, a high switching frequency DTC drive is possible without requiring a high-frequency space-vector modulator. The implementation of the controller is simple and operates based on waveform comparisons; in this letter it is implemented using a combination of a DSP and a field programmable gate array device. Simulation and experimental results indicate that the controller both reduces the torque ripple and maintains a constant switching frequency.
|Uncontrolled Keywords:||Ac drives DSP constant switching frequency controller digital signal processor direct torque control drives field programmable gate array hysteresis comparator induction machines induction motor drives synchronization torque ripple triangular waveform|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Deposited By:||Dr Zaharuddin Mohamed|
|Deposited On:||16 Mar 2007 07:28|
|Last Modified:||01 Jun 2010 02:59|
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