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2010•MicromotorsRequires access

Study of Stator Flux Observer in Direct Torque Control

YI Long-fang

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Abstract

Aimed at shortage of pure integrator and low-pass filter method of stator flux linkage estimation in DTC,this paper presented an improved integrator flux linkage observatory with amplitude limited to provide integral saturation.Simulation shows that the system used this flux linkage observer has strong immunity in high speed,and it can inhibit initial value inaccuracy of integrator and DC shift inaccuracy,it also improves estimating precision of stator flux linkage and takes on a preferable performance of the static and dynamic state.

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What this paper is about

Aimed at shortage of pure integrator and low-pass filter method of stator flux linkage estimation in DTC,this paper presented an improved integrator flux linkage observatory with amplitude limited to provide integral saturation.Simulation shows that the system used this flux linkage observer has strong immunity in high speed,and it can inhibit initial value inaccuracy of integrator and DC shift inaccuracy,it also improves estimating precision of stator flux linkage and takes on a preferable performance of the static and dynamic state.

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Available abstract

Aimed at shortage of pure integrator and low-pass filter method of stator flux linkage estimation in DTC,this paper presented an improved integrator flux linkage observatory with amplitude limited to provide integral saturation.Simulation shows that the system used this flux linkage observer has strong immunity in high speed,and it can inhibit initial value inaccuracy of integrator and DC shift inaccuracy,it also improves estimating precision of stator flux linkage and takes on a preferable performance of the static and dynamic state.

Key concepts: Integrator, Flux linkage, Control theory (sociology), Stator, Direct torque control, Torque, Observer (physics), Double integrator

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