Full-order observer for direct torque control of induction motor based on constant V/F control technique

Pimkumwong, Narongrit; Wang, Ming‐Shyan

doi:10.1016/j.isatra.2017.12.014

Cited by 24 publications

(14 citation statements)

References 28 publications

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“…By substituting (14) into (12), the total electrical loss of the motor can be accurately represented by the stator voltage U 1 and motor load torque T L , i.e., the exact solution P  of the total electrical loss. By substituting (16) into (12), the total electrical loss of the motor can be expressed approximately by the stator voltage and motor load torque, i.e., the approximate solution P  of the total electrical loss. The approximate expression (16) is convenient to use and significantly simplifies the calculation.…”

Section: Optimal Regulating Voltage Of Motor Energy Savingmentioning

confidence: 99%

“…There are mainly two speed regulation modes: variable frequency speed regulation and pole-changing speed regulation based on the motor steadystate mathematical model [13], [14]. The latter is vector control based on a dynamic mathematical model of the motor [15], [16]. Vector control theories and methods mainly include adaptive control [17][18][19][20], inverse dynamics control [21][22][23], fuzzy control [24], [25], back-stepping control [26], and sliding mode control [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Principle of Optimal Voltage Regulation and Energy-Saving for Induction Motor With Unknown Constant-Torque Working Condition

Zhong

Ma²,

Hao

2020

IEEE Access

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To achieve optimal voltage regulation and energy savings of an AC induction motor operating under constanttorque and variable-working-load conditions, and consider a motor's T-type and Γ-type equivalent circuit, the copper and iron losses of the stator were regarded as invariable losses that were only related to the stator voltage, and the copper losses of the rotor were regarded as variable losses that varied with the load torque. The total electrical loss formula and the optimal voltage regulation formula for the motor were deduced. The formulas revealed that the total electrical loss of the motor was affected by the stator voltage and the rotor load torque, and the optimal voltage regulation changed exponentially with the load torque of the motor. The calculation results of an engineering example showed that when s = 0.01-0.03 and the motor operated stably, the motor load torque error was not more than 1.8 Nꞏm based on the exact and approximate solutions of the slip s. The total electrical loss showed almost no calculation error when the working voltage of the motor was higher than 230 V. The optimal voltage regulation and its error increased with the increase in the motor load torque, but within the working voltage range of the motor, the optimal voltage regulation error did not exceed 6 V. The total electrical loss with the optimal voltage regulation mode and a variable load torque was less than the total electrical loss of a 380-or 220-V constant driving mode. With the increase in the load rate, the total electrical loss increased. When the motor's load did not exceed the medium load and the motor operated with optimal voltage regulation, the energy-saving effect was significant. In particular, when the motor operated without a load, the total electrical loss was almost 0. INDEX TERMS Induction motor, constant-torque working condition, equivalent circuit, total electrical loss, optimal voltage regulation, energy-saving.

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Section: Optimal Regulating Voltage Of Motor Energy Savingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Principle of Optimal Voltage Regulation and Energy-Saving for Induction Motor With Unknown Constant-Torque Working Condition

Zhong

Ma²,

Hao

2020

IEEE Access

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“…For a measured state, the algorithm of control computes the possible evolutions in the state space relating to the different configurations, using Eq. (20). A graphical representation of these vectors is given in Figure 5.…”

Section: Determination Of Directionsmentioning

confidence: 99%

Hybrid control of five-phase permanent magnet synchronous machine using space vector modulation

Difi¹,

Halbaoui²,

Boukhetala³

2019

Turk J Elec Eng & Comp Sci

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This paper aims to study the hybrid control of a five-phase permanent-magnet synchronous machine improved by the space vector modulation (SVM) technique. The torque ripples and currents will therefore be reduced. This control is based on the theory of hybrid dynamic systems (HDS), its discrete component is the voltage inverter which has a finite number of states controlling the continuous component that represents the machine. The results of the simulation made on MATLAB/Simulink are presented and discussed in order to check the performance of the strategy of the studied control. They show, in particular, the main advantages of this control manifesting the good dynamic of the electromagnetic torque and the robustness against the parametric variations.

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“…Among all known types of Luenberger observers, only the proportional type is commonly applied in induction motor control systems [1]. This observer, as well as other solutions obtained from that, for example the one described in [25], have one great advantage-it is easy to calculate their gains. In case of the observer described in [1], eigenvalues are proportional to the motor's values, and only a value for the proportionality factor should be assumed.…”

Section: Introductionmentioning

confidence: 99%

Developing Induction Motor State Observers with Increased Robustness

Białoń¹,

Pasko²,

Niestrój³

2020

Energies

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This paper presents the results of recently conducted research on Luenberger observers with non-proportional feedbacks. The observers are applied for the reconstruction of magnetic fluxes of an induction motor. Structures of the observers known from the control theory are presented. These are a proportional observer, a proportional-integral observer, a modified integral observer, and an observer with additional integrators. The practical application of some of these observers requires modifications to their structures. In the paper, the simulation results for all mentioned types of observers are presented. The simulations are performed with a Scilab-Xcos model which is attached to this paper. The problem of gains selection of the observers is discussed. Gains are selected with the described optimization method based on a genetic algorithm. A Scilab file launching the genetic algorithm also is attached to this paper.

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Full-order observer for direct torque control of induction motor based on constant V/F control technique

Cited by 24 publications

References 28 publications

Principle of Optimal Voltage Regulation and Energy-Saving for Induction Motor With Unknown Constant-Torque Working Condition

Principle of Optimal Voltage Regulation and Energy-Saving for Induction Motor With Unknown Constant-Torque Working Condition

Hybrid control of five-phase permanent magnet synchronous machine using space vector modulation

Developing Induction Motor State Observers with Increased Robustness

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