Extension of the Operating Speed for Vector-Controlled Induction Machine Drives in the Overmodulation Range

Title
Extension of the Operating Speed for Vector-Controlled Induction Machine Drives in the Overmodulation Range
Author(s)
이동춘누옌탄하이
Keywords
STATOR FLUX VECTOR; TORQUE CONTROL; INVERTERS; MODULATION; STRATEGY; REGION; MODE
Issue Date
201203
Publisher
KOREAN INST POWER ELECTRONICS
Citation
JOURNAL OF POWER ELECTRONICS, v.12, no.3, pp.477 - 486
Abstract
This paper proposes a novel current control scheme for vector-controlled induction machine (IM) drives in the overmodulation (OVM) range, with which the voltage utilization of the voltage-source inverter (VSI) can be maximized. In the OVM region, the original voltage reference is modified by changing its magnitude and angle, which causes the motor current to be distorted, resulting in a deterioration of the current control performance. To meet with this situation, the harmonic components in the feedback currents should be eliminated before being input to the PI current controllers. For this, a composite observer is applied to extract the fundamental and harmonic components from the distorted currents, which gives a good performance without a delay and the effect of a fundamental frequency variation. In addition, through a detailed analysis of the response of the PI current controllers in the OVM range, the effectiveness of using the composite observer is demonstrated. Simulation and experimental results for a 3-kW induction motor drive are shown to verify the validity of the proposed method.
URI
http://hdl.handle.net/YU.REPOSITORY/29499http://dx.doi.org/10.6113/JPE.2012.12.3.477
ISSN
1598-2092
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공과대학 > 전기공학과 > Articles
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