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Constant and high switching frequency torque controller for DTC drives

Toh, C. L. and Nik Idris, N. R. and Yatim, Abdul Halim Mohamad (2005) Constant and high switching frequency torque controller for DTC drives. IEEE Power Electronics Letters, 3 (2). pp. 76-80. ISSN 1540-7985

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Official URL: http://dx.doi.org/10.1109/LPEL.2005.851316

Abstract

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

Item Type:Article
Uncontrolled Keywords:Ac drives, direct torque control, induction motor drives
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:7306
Deposited By: Nur Amal Zakiah Shamsudin
Deposited On:02 Jan 2009 07:08
Last Modified:01 Jun 2010 15:50

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