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A Predictive Voltage-Vector Selection Algorithm in Direct Torque Control of Induction Motor Drives
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| Author(s) |
A. Tani; G. Serra; C. Rossi; D. Casadei |
| Abstract |
An analysis of the torque ripple in Direct Torque Control (DTC) of induction motor drives is carried
out by linearizing the machine equations around a steady-state operating point. The low number of
voltage vectors available in each cycle period for compensating the torque and flux errors, is
responsible for torque and flux variations. A new DTC technique based on the application of Space
Vector Modulation (SVM) with prefixed duty cycles for improving the drive performance is
presented. In this way it is possible to synthesize a higher number of voltage vectors without the need
of timers and PWM signal generators, preserving the basic feature of DTC. A predictive algorithm is
used to select the most opportune voltage vector sequence for the compensation of torque and flux
errors. Numerical simulations and experimental tests are presented for validating the proposed control
technique |
| Download |
| Filename: | EPE-PEMC2002 - T8-063 - Tani.pdf |
| Filesize: | 622.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-05-25 by System |
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