doi 10.18503/2311-8318-2016-2(31)-30-34
Abstract
It is shown that increasing the energy efficiency class of asynchronous motors in European countries makes it possible to increase the weight of active material. This increases the cost of electric motors. In the Russian Federation the highest energy efficiency class of asynchronous motors is achieved not by increasing the weight of active material, as is common among European manufacturers, but by the redistribution of mass of copper of a single three-phase stator winding into two three-phase windings and the use of small-sized compensating device such as a regulated three-phase capacitor capacitance. To create energy-efficient electric motors, the research group developed mathematical models, algorithms and programs for calculation and optimization of the cost of major repairs of asynchronous motors with energy efficiency class standard IEG60034-30. The technique is based on the account of repair and modernization of asynchronous motors during manufacturing operations. We consider the process steps of traditional maintenance and repair as technological operations with energy efficiency classes of asynchronous motors. Mathematical models calculate labor costs and the cost of material resources. Mathematical models contain the following parameters: nominal data of the repaired engine; dimensions of the magnetic system of the electric machine; coil type; groove shape; staffing the repair site; qualified maintenance personnel; the cost of working time; the duration of technological operations; costs of material resources and their price; coefficient of materials consumption. The calculation results are presented to the user on labor and material costs for each processing operation and repairs as a whole in the form of tables and diagrams. The development makes it possible to prove the feasibility of the modernization of a traditional asynchronous motor to a asynchronous motor with individual compensation of reactive power of high energy class and energy efficiency and to carry out optimization of its development costs. The software package is recommended to professionals and electric machine building and maintenance enterprises.
Keywords
Mathematical model, algorithm, calculation, optimization, computer software, technology, repair, modernization, induction motor, energy efficiency.
1. Mugalimov R.G. Asinkhronnye dvigateli s individualnoy kompensatsiyey reaktivnoy moshchnosti i elektroprivody na ikh osnove [Induction Motors with Individual Compensation of Reactive Power and Electric Drives on Based on them]. Magnitogorsk, NMSTU. 2011, 250 p.
2. Mugalimov R.G., Mugalimova A.R. Technology for Reconstruction of Traditional Induction Motors to Energy Saving Variants. Russian Internet Journal of Industrial En-gineering. 2013, no.1, pp. 56-61.
3. Mugalimov R.G., Kosmatov V.I., Mugalimova A.R., Gubaidullin A.R. Eksperimentalnye issledovaniya energosberegayushchikh elektroprivodov nasosnykh agregatov [Experimental Studies of Energy Saving Electric Drives of Pump Units]. News of universities. Electromechanics. 2011, no.4, pp. 95-101.
4. Mugalimov R.G., Mugalimova A.R. Opredeleniye yemkosti kompensiruyushchego kondensatora asinkhronnogo dvigatelya s individualnoy kompensatsiyey reaktivnoy moshchnosti [Definition of Capacity of Compensating Capac-itor Induction Motor with Individual Reactive Power Com-pensation]. Proceedings of TulGU. Technical sciences. 2010, issue 3, vol.4, pp. 115-120.
5. Mugalimov R.G., Kosmatov V.I., Mugalimova AR. Mathematical Description of Electric Drive Based on Energy-saving Induction Motor with Individual Reactive Power Compensation. Russian Internet Journal of Industrial Engi-neering. 2013, no.2, pp. 78-89.
6. Mugalimov R.G., Mugalimova A.R., Bokov A.I. Method and Firmware Complex for Experimental Rapid Assessments of Equivalent Circuit Parameters of Asynchronous Motor. Russian Internet Journal of Electrical Engineering. 2014, vol.1, no. 2, pp. 44-50.
7. Mugalimov R.G., Zakirova R.A., Mugalimova A.R. Software System for Calculation and Optimization of Cost of Tradi-tional Overhaul and Repair to Increase Energy Efficiency Class of Induction Motors. Certificate of state registration of computer software 2016610278, registered in the Register of computer programs on 01.11.2016.