Constant and high switching frequency torque controller for DTC drives
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 synchronizi...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2005
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/7306/1/A_H_Yatim_2005_Constant_High_Switching_Frequency_Torque.pdf http://eprints.utm.my/id/eprint/7306/ http://dx.doi.org/10.1109/LPEL.2005.851316 |
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| Institution: | Universiti Teknologi Malaysia |
| Language: | English |
| Summary: | 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 |
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