Novel switching techniques for reducing the speed ripple of AC drives with direct torque control
Lai, Y.-S.
Wen-Ke Wang
Yen-Chang Chen
Dept. of Electr. Eng., Nat. Taipei Univ. of Technol., Taiwan, Taiwan;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug. 2004
Volume: 51,
Issue: 4
On page(s): 768- 775
ISSN: 0278-0046
INSPEC Accession Number: 8110775
Digital Object Identifier: 10.1109/TIE.2004.831720
Current Version Published: 2004-08-02
Abstract
The main theme of this paper is to present novel switching techniques, which insert zero-voltage vectors and/or more nonzero-voltage vectors to the conventional switching table, for AC drives with direct torque control. For the same sampling frequency of a drive controller, the proposed techniques are quite effective in reducing the torque pulsation and the speed ripples of the motors, as demonstrated in several experimental results. Moreover, the experimental confirmations have been made not only on an induction machine but also on a permanent-magnet synchronous machine.
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