Search

Based on the refined mathematical model of the linear induction motor, which considers the end effects, the saturation of the magnetic field and the incomplete overlap of the inductor by the secondary element, a simulation model of the electric drive was created in the Matlab package. A simulation of the linear electric drive operation was carried out, which takes into account the effect of the input-output of the secondary element from the magnetic field of the inductor. The obtained results of the studies confirm the efficiency of the developed model and its suitability for carrying out refined modeling and synthesis of the control laws of the linear electric drive. References 12, figures 13, table 1. [ABSTRACT FROM AUTHOR]

The synthesis of a fuzzy proportional-integral-differential speed regulator of the arc stator electric drive of the rotation of the radar station antenna with combined control was carried out. The structural diagram of the fuzzy regulator was developed, the input and output linguistic variables are defined, the rule base was compiled, the dependence surfaces of the output control variable on the input coordinates are obtained. A simulation model of an electric drive in the Matlab system with a synthesized fuzzy logic regulator based on a two-phase model of an asynchronous arc-stator motor was built. Modeling of the nominal and the most difficult mode of operation of the electric drive was carried out, graphs of transient processes were obtained, which confirm its operability even under conditions of extreme loads. Refreces 9, figures 7, table 1. [ABSTRACT FROM AUTHOR]

Copyright of Technical Electrodynamics / Tekhnichna Elektrodynamika is the property of National Academy of Sciences of Ukraine, Institute of Electrodynamics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

There are a number of installations and technological processes, the movement of which is carried out by an external source of energy, and the electric machine, not being the main source of movement, constantly or periodically is in the mode of electric generating braking to provide the desired characteristics of the workflow. The problem solved in this research is to expand the functionality of the generator and the motor in the electric braking mode. The problem is solved by an automatic control of the coordinates of the electric machine in the generator mode. A feature of the proposed control method is that one or more coordinates of generator or motor in electric braking mode are forcibly set by an external energy source, and the goal of coordinated control of other variables of an electric machine is to provide a given law for converting mechanical energy into electrical or an algorithm for the movement of an executive object of a working machine. The article presents example of the synthesis of regulated electric drive control algorithm based on the principle of coordinated control of variables. The example concerns the inverted mode of operation of a pumping unit of a hydro storage power station. According to the criterion of constant output power under conditions of changing the liquid level, an algorithm for frequency control of an asynchronous machine is synthesized, which is realized by adjusting the calculated idling speed of the engine, the rotor of which rotates an external motion source with a speed, that can generally change according to an random law. The task of the control algorithm is to maintain a constant power generation energy, regardless of the actual speed of rotation of the rotor. The proposed approach to the synthesis of generator mode of electric machines, through the use of the principle of coordinated control of variables, acquires qualitatively new properties, as compared with traditional methods of electric braking, increases the technical and economic indicators of the electromechanical system as a whole. Bibl. 9, fig. 6. [ABSTRACT FROM AUTHOR]

Copyright of Technical Electrodynamics / Tekhnichna Elektrodynamika is the property of National Academy of Sciences of Ukraine, Institute of Electrodynamics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)