A Fast-Converging Algorithm for the Efficiency Optimization of Vector Controlled Induction Motor Drives Based on a Hybrid Magnetic Flux Controller Architecture

2016 ◽  
Vol 856 ◽  
pp. 374-379
Author(s):  
Alexandros Alexandrou ◽  
Antonios G. Kladas
Keyword(s):  
Magnetic Flux ◽  
Induction Motor ◽  
Time Delays ◽  
Control Algorithm ◽  
Search Time ◽  
Motor Drives ◽  
Power Losses ◽  
Induction Motor Drives ◽  
Efficiency Optimization ◽  
Im Model

The paper introduces a magnetic flux control algorithm for the minimization of losses in Induction Motor (IM) drives. The proposed methodology accounts for search time delays and IM model deficiencies and has been applied to minimize power losses. The controller is validated on an IM prototype and offers improved transient response.

Induction motor drives with minimal power losses

2012 ◽  
Vol 83 (12) ◽  
pp. 667-671 ◽  
Author(s):  
A. S. Kosmodamianskii ◽  
V. I. Vorob’ev ◽  
A. A. Pugachev
Keyword(s):  
Induction Motor ◽  
Motor Drives ◽  
Power Losses ◽  
Induction Motor Drives

scholarly journals Simple Hybrid Model for Efficiency Optimization of Induction Motor Drives with Its Experimental Validation

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Branko Blanuša ◽  
Bojan Knezevic
Keyword(s):  
Induction Motor ◽  
Hybrid Model ◽  
Experimental Tests ◽  
Motor Drives ◽  
Control Technique ◽  
Induction Motor Drives ◽  
Loss Model ◽  
Efficiency Optimization ◽  
Model Control ◽  
Search Control

New hybrid model for efficiency optimization of induction motor drives (IMD) is presented in this paper. It combines two strategies for efficiency optimization: loss model control and search control. Search control technique is used in a steady state of drive and loss model during transient processes. As a result, power and energy losses are reduced, especially when load torque is significant less related to its rated value. Also, this hybrid method gives fast convergence to operating point of minimal power losses and shows negligible sensitivity to motor parameter changes regarding other published optimization strategies. This model is implemented in vector control induction motor drive. Simulations and experimental tests are performed. Results are presented in this paper.

scholarly journals Real-time loss minimization control in induction machines based on DSP TMS320LF2812

2013 ◽  
Vol 16 (4) ◽  
pp. 5-18
Author(s):  
Phuong Minh Le ◽  
Dung Duc Le ◽  
Thuyen Viet Nguyen ◽  
Phong Hoai Nguyen
Keyword(s):  
Real Time ◽  
Induction Motor ◽  
Digital Signal Processor ◽  
Digital Signal ◽  
Induction Machines ◽  
Motor Drives ◽  
Induction Motor Drives ◽  
Efficiency Optimization ◽  
Core Losses ◽  
Flux Level

This paper presents a DSP based implementation of simple and very useful control algorithm for the real-time efficiency optimization of the indirect vectorcontrolled induction motor drives. Conventional field-oriented induction motor drives operate at rated flux even at low load. To improve the efficiency of the existing induction motors, it is important to regulate the magnetization flux of the motor in the desired operating range. This paper presents techniques for minimizing power loss (the copper and core losses) of induction motor based on determination of an optimum flux level for the efficiency optimization of the vector-controlled induction motor drive. An induction motor (IM) model in d-q coordinates is referenced to the rotor magnetizing current. Thus the decomposition into d-q components in the steady-state motor model can be utilized in deriving the motor loss model. The algorithm offers a fast convergence. The complete closed loop vector control of the proposed LMC-based IM drive is successfully implemented in real-time using digital signal processor DSP TMS320LF2812 for 1HP motor induction motor. The close agreement between the simulation by Matlab/Simulink and the experimental results confirms the validity and usefulness of the proposed techniques. The proposed LMC in a comparison with conventional FOC can reduce total losses from 5% to 67.2% for all load ranges.

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

2013 ◽  
Vol 4 (1) ◽  
pp. 38-44
Author(s):  
Alexander Burkov ◽  
Evgenii Krasilnikyants ◽  
Alexander Smirnov ◽  
Georgy Bouldukan
Keyword(s):  
Magnetic Flux ◽  
Induction Motor ◽  
Induction Motors ◽  
Motor Drives ◽  
Fine Tuning ◽  
Active Components ◽  
Induction Motor Drives ◽  
Flux Observer ◽  
Stator Current ◽  
Constant Magnitude

Abstract 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.

scholarly journals Assessment of unsymmetrical voltage sag effects on AC adjustable speed drives

2009 ◽  
Vol 22 (3) ◽  
pp. 341-360
Author(s):  
Milutin Petronijevic ◽  
Nebojsa Mitrovic ◽  
Vojkan Kostic ◽  
Borislav Jeftenic
Keyword(s):  
Induction Motor ◽  
Control Algorithm ◽  
Motor Drives ◽  
Voltage Sag ◽  
Motor Drive ◽  
Voltage Sags ◽  
Induction Motor Drives ◽  
Adjustable Speed Drives ◽  
Adjustable Speed ◽  
Theoretical Results

This paper analyses the influence of unsymmetrical voltage sags on the increase of torque and speed deviation induction motor adjustable speed drives. The three following general types of induction motor drives control are analyzed: scalar controlled (V/Hz), rotor-field-oriented (RFO) and direct-torque-controlled(DTC). The analytical expression for variations of dc link voltage incorporated into the corresponding drive models and formulas for assessment of current/torque deviation are derived depending on the applied control algorithm. Afterwards, the presented theoretical results for the deterioration of motor drive performance due to voltage sags are validated experimentally. Measurements of sag-caused mechanical vibrations are used for the additional verification of the obtained results. .

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