The Model of Nonstationary Rotor Magnetic Field Observer in the Induction Motor

Burkov, A. P.; Krasilnikyants, E. V.; Смирнов, А. В.

doi:10.2478/v10144-011-0023-9

Cited by 2 publications

(1 citation statement)

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“…The first group consists of the observers, which use the information about stator line currents and rotor position or velocity [4][5][6][7]. The second group consists of the observers functioning according to the data from current and voltage sensing devices [8][9][10][11]. Tentatively, controlling systems with such observers are called "sensorless", indicating the absence of the measuring element on the motor shaft.…”

Section: Introductionmentioning

confidence: 99%

The Re-examination of Adjustment of the Rotor Magnetic Field Observer in the Induction Motor

Burkov¹,

Krasilnikyants²,

Смирнов³

et al. 2013

Electrical, Control and Communication Engineering

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Wide use of induction motor drives makes the problems related to induction motors very topical. One of such problems is the maximal utilization of torque and velocity of induction motors. In this regard the use and accurate adjustment of rotor magnetic flux observers may be helpful. The technique of observer adjustment is subject of special interest. This technique can be regarded as optimal if it ensures constant acceleration that, in turn, corresponds to constant magnitude of active and magnetizing components of stator current. In contrast, nonoptimal tuning of the magnetic flux observer creates a transient response caused by variation of magnetic and active components of the stator current resulting in changing acceleration of the motor. However, the parameters of non-optimal process can be used for fine tuning of the observer which considers the variation of the time constants obtained analyzing the drive's magnetic circuit saturation. It is possible to conclude that implementation of fine adjustment of rotor magnetic flux observer is of critical importance for induction motor torque and velocity maximum utilization.

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