A dynamic decoupling control scheme for high-speed operation ofinduction motors
Jinhwan Jung; Kwanghee Nam
Industrial Electronics, IEEE Transactions on
Volume 46, Issue 1, Feb 1999 Page(s):100 - 110
Digital Object Identifier 10.1109/41.744397
Summary:In a high-speed operation of a vector-controlled induction motor,
coupling between d-q current dynamics impairs the characteristics of
torque response. The feedforward decoupling scheme does not perform well
if an error exists in the motor parameter estimation. We derive a
dynamic decoupling condition when the two additional proportional
integral current controllers are used. A great advantage of this dynamic
decoupling controller is the robustness to the motor parameter
estimation errors. Further, we observe that overmodulation methods lead
to the violation of the decoupling condition, thereby yielding a poor
performance in the high-speed high-power operation. As a method of
resolving this problem, we propose a decoupling preserving
overmodulation algorithm which also enhances the torque transient
response. Through simulation and experimental results, we demonstrate
the improved performance of the proposed controller
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