| Heading: | Saving electrical energy When consumed. |
| Technology classification: | Organizational. |
| Project consideration status by the Coordination Council: | Not considered. |
| Implementation objects: | Industry, Others, Pumping stations, Boiler houses, RTS, KTS, CHP, Heating networks, incl. DHW systems. |
| Implementation effect: | - for the object: saving electricity, increasing the reliability and durability of equipment, reducing operating costs; - for the municipality: extra power is released. |
Enterprises should systematically carry out modernization and replacement of obsolete equipment, in particular, on replacing uneconomical electric motors with electric motors of new series that meet modern energy efficiency requirements.
To make a decision to replace equipment, it is necessary to conduct a survey of the technical condition of the electric motors of the mechanisms, analyze the operating modes, real loads and operating conditions of electric motors, and also develop recommendations for improving the methods of their operation and increasing the operational reliability.
It is also necessary to assess the possibility and feasibility of using variable speed drives for specific mechanisms.
It is advisable to take part in the acceptance of new electric motors at the manufacturing plant (according to the developed project), as well as to conduct an experimental study of their characteristics at the installation site.
The task of choosing an electric motor (direct current, asynchronous, synchronous) when working with long-term constant load relatively simple - it is recommended to use synchronous motors. This is due to the fact that a modern synchronous motor starts up as quickly as an asynchronous motor, and its dimensions are smaller and more economical than an asynchronous motor of the same power (a synchronous motor has a higher maximum torque Mmax on the shaft and above power factor cosφ).
At the same time, in asynchronous motors of the latest generation, using special control devices, it is possible to effectively regulate the rotation speed, reverse with the necessary torque for the operation of the electric drive.
When choosing the type of drive motor that should work under variable speed conditions reverse, large load changes, frequent starts, it is necessary to compare the operating conditions of the electric drive with the features of the mechanical characteristics of various types of electric motors.
The most reliable, economical and easy to operate with frequent starts and non-constant load is a squirrel cage induction motor. If it is impossible to use a short-circuited asynchronous motor, for example, at high powers, an asynchronous motor with a wound rotor is installed.
Due to the presence of a brushed-collector assembly, a DC motor is more complex in design and higher in cost than an AC motor, requires more careful maintenance and wears out faster. However, sometimes, preference is given to a DC motor, which allows simple means to change the speed of the electric drive in a wide range.
The type of engine (its design) is selected depending on the environmental conditions. If an explosive atmosphere is present, it must be protected against possible sparks in the engine. The engines themselves must be protected from dust, moisture, chemicals from the environment.
Very often there is a need to regulate the speed of rotation of the rotor of the engine.
Exists two reliable methods(but substantially imperfect) to regulate engine speed.
- switching the number of pairs of poles of the stator winding;
- the inclusion of resistors in the chain of the armature windings of the rotor.
The first method provides only discrete (stepwise) control and is practically used mainly for low-power drives, and the second is rational only with narrow control limits with a constant torque on the motor shaft.
Due to the recent appearance of powerful semiconductor devices, the situation in this area has changed significantly. Modern electronic converters allow changing the frequency of alternating current in a wide range, which makes it possible to smoothly control the speed of the rotating magnetic field, and, therefore, effectively control the speed of rotation of synchronous and asynchronous motors.
An electric motor with an optimally selected drive power must provide:
- reliability in work;
- efficiency in operation;
- the ability to work in a variety of conditions.
Installing an electric motor with a lower power than necessary for the operating conditions of the drive reduces the performance of the electric drive and makes it unreliable. In this case, the electric motor itself can be damaged in such conditions.
Installation of an overpowered engine causes unnecessary energy losses during the operation of an electric machine, causes additional capital investments, an increase in the mass and dimensions of the engine.
The motor must operate normally with possible temporary overloads and develop a starting torque on the shaft that is required for the normal functioning of the actuator. The engine must not heat up during operation up to the maximum permissible temperature, in extreme cases, for a very short time. Therefore, in most cases, the engine power is selected based on the heating conditions to the maximum permissible temperature (the so-called heating power selection).
Then a check is carried out for compliance of the motor overload capacity with the conditions of starting the machine and temporary overloads. Sometimes, with a large short-term overload, you have to choose a motor based on the required maximum power. In such conditions, the maximum engine power is usually not used for a long time.
For a drive with continuous operation at constant or slightly varying load, the motor power must be equal to the load power, and checks for overheating and overload during the operation of the electric drive are not necessary (this is due to the initially determined operating conditions of the electric motor). However, it is necessary to check whether the Starting torque on the motor shaft for the starting conditions of this electrical machine.
Articles on this topic:
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Modern three-phase energy-saving motors can significantly reduce energy costs due to their higher efficiency. In other words, such motors are able to generate more mechanical energy from each kilowatt of electrical energy expended. More efficient energy consumption is achieved through individual reactive power compensation. At the same time, the design of energy-saving electric motors is highly reliable and has a long service life.
Universal three-phase energy-saving electric motor Besel 2SIE 80-2B version IMB14
Application of three-phase energy-saving motors
Three-phase energy-saving motors can be used in almost all industries. They differ from conventional three-phase motors only in their low energy consumption. In the face of constantly rising energy prices, energy-saving electric motors can become a truly profitable option for both small manufacturers of goods and services and for large industrial enterprises.
The money spent on the purchase of a three-phase energy-saving motor will quickly return to you in the form of savings in funds allocated for the purchase of electricity. Our store invites you to get additional benefits by purchasing a high-quality three-phase energy-saving motor at a really low price. Replacing morally and physically obsolete electric motors with the latest high-tech energy-saving models is your next step to a new level of business profitability.
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YES. Duyunov , Project Manager, AS and PP LLC, Moscow, Zelenograd
In Russia, the share of asynchronous motors, according to various estimates, accounts for 47 to 53% of the consumption of all generated electricity. In industry - on average 60%, in cold water supply systems - up to 90%. They carry out almost all technological processes associated with movement, and cover all spheres of human life. With the advent of new, so-called motors with combined windings (DSO), it is possible to significantly improve their parameters without increasing the price.
There are more asynchronous motors for every apartment in a modern residential building than there are residents. Earlier, since there was no problem of saving energy resources, when designing the equipment, they tried to “hedge their bets” and used engines with a power exceeding the calculated one. Energy saving in design faded into the background, and such a concept as energy efficiency was not so relevant. Energy efficient motors are more of a Western phenomenon. The Russian industry did not design or manufacture such engines. The transition to a market economy has dramatically changed the situation. Today, saving a unit of energy resources, for example, 1 ton of fuel in conventional terms, is twice as cheap as producing it.
Energy-efficient motors (ED) presented on the external market are asynchronous ED with a squirrel-cage rotor, in which, due to an increase in the mass of active materials, their quality, as well as due to special design techniques, it is possible to increase by 1-2% (powerful motors) or 4-5% (small motors) nominal efficiency with a slight increase in motor price. This approach can be beneficial if the load changes little, speed control is not required, and the motor parameters are correctly selected.
Using motors with combined windings (DSO), due to improved mechanical characteristics and higher energy indicators, it became possible not only to save from 30 to 50% of energy consumption with the same useful work, but also to create an adjustable energy-saving drive with unique characteristics that does not have analogues in the world. The greatest effect is achieved when using DSO in installations with a variable nature of the load. Based on the fact that at present the global production of asynchronous motors of various capacities has reached seven billion units per year, the effect of the introduction of new motors can hardly be overestimated.
It is known that the average load of the electric motor (the ratio of the power consumed by the working body of the machine to the rated power of the electric motor) in the domestic industry is 0.3-0.4 (in European practice, this value is 0.6). This means that a conventional motor operates at a significantly lower efficiency than nominal. Overestimated engine power often leads to imperceptible at first glance, but very significant negative consequences in the equipment serviced by an electric drive, for example, to excessive pressure in hydraulic networks associated with an increase in losses, a decrease in reliability, etc. Unlike standard ones, DSOs have a low level of noise and vibrations, a higher multiplicity of moments, have an efficiency and a power factor close to the nominal in a wide range of loads. This makes it possible to raise the average load on the engine to 0.8 and to improve the characteristics of the technological equipment serviced by the drive, in particular, to significantly reduce its energy consumption.
Savings, payback, profit
The above concerns energy saving in the drive and is intended to reduce losses for the conversion of electrical energy into mechanical energy and increase the energy performance of the drive. DSS with a large-scale implementation provide ample opportunities for energy saving up to the creation of new energy-saving technologies.
According to the website of the Federal State Statistics Service (http://www.gks.ru/
wps / wcm / connect / rosstat / rosstatsite / main /), electricity consumption in 2011 in Russia as a whole amounted to 1,021.1 billion kWh.
According to the order of the Federal Tariff Service of 06.10.2011 No. 239-e / 4, the minimum tariff level for electricity (power) supplied to buyers in retail markets in 2012 will be 164.23 kopecks / kWh (excluding VAT) ...
Replacing standard induction motors will save 30 to 50% energy for the same useful work. The economic effect of widespread replacement will be at least:
1021.1 · 0.47 · 0.3 · 1.6423 = 236.4503 billion rubles. in year.
In the Moscow region, the effect will be at least:
47100.4 · 0.47 · 0.3 · 1.6423 = 10906.771 million rubles. in year.
Taking into account the limit levels of tariffs for electricity in peripheral and other problem areas, the maximum effect and the minimum payback period are achieved in the regions with the maximum tariffs - Irkutsk Region, Khanty-Mansi Autonomous Okrug, Chukotka Autonomous Okrug, Yamalo-Nenets Autonomous Okrug, etc.
The maximum effect and the minimum payback period can be achieved when replacing motors with continuous operation, for example, water supply pumping units, fan units, rolling mills, as well as highly loaded engines, for example, elevators, escalators, conveyors.
To calculate the payback period, the prices of OJSC UralElektro were taken as the basis. We believe that an energy service contract has been concluded with the enterprise for the replacement of the ADM 132 M4 engine of the pumping unit on a lease basis. Engine price 11 641 rubles. The cost of work on its replacement (30% of the cost) 3 492.3 rubles. Additional costs (10% of the cost) 1 164.1 rubles.
Total costs:
11 641 + 3 492.3 + 1 164.1 = 16 297.4 rubles.
The economic effect will be:
11 kW · 0.3 · 1.6423 rubles / kW · h · 1.18 · 24 = = 153.48278 rubles. per day (including VAT).
Payback period:
16,297.4 / 153.48278 = 106.18 days or 0.291 years.
For other capacities, the calculation gives similar results. Considering that the operating time of engines at industrial enterprises may not exceed 12 hours, the payback period may be no more than 0.7-0.8 years.
It is assumed that under the terms of the lease contract, the company that replaced the engines with new ones, after paying the lease payments, will pay 30% of the electricity savings within three years. In this case, the income will be: 153.48278 · 365 · 3 = 168,063.64 rubles. Consequently, the replacement of one low-power engine allows you to get income from 84 to 168 thousand rubles. On average, from replacing engines from one small utility company, you can get an income of at least 4.8 million rubles. The introduction of new engines during the modernization of standard ones will in many cases allow the utilities and transport to refuse subsidies for electricity without increasing tariffs.
The project acquires special social significance in connection with Russia's accession to the WTO. Domestic manufacturers of asynchronous motors are unable to compete with the world's leading manufacturers. This can lead to bankruptcy of many city-forming enterprises. Mastering the production of motors with combined windings will not only eliminate this threat, but also create serious competition in foreign markets. Therefore, the implementation of the project has political significance for the country.
The novelty of the proposed approach
In recent years, in connection with the advent of reliable and affordable frequency converters, variable asynchronous drives have become widespread. Although the price of converters remains quite high (two to three times more expensive than a motor), in some cases they can reduce power consumption and improve motor performance, bringing them closer to the characteristics of less reliable DC motors. The reliability of frequency controllers is also several times lower than that of electric motors. Not every consumer has the opportunity to invest such a huge amount of money on the installation of frequency controllers. In Europe, by 2012, only 15% of variable speed drives are equipped with DC motors. Therefore, it is relevant to consider the problem of energy saving mainly in relation to an asynchronous electric drive, including a frequency-controlled one, equipped with specialized motors with a lower material consumption and cost.
In world practice, there are two main directions for solving this problem.
The first is energy saving by means of an electric drive due to the supply of the required power to the end consumer at each moment of time. The second is the production of energy efficient motors that meet the IE-3 standard. In the first case, efforts are aimed at reducing the cost of frequency converters. In the second case - for the development of new electrical materials and optimization of the basic dimensions of electrical machines.
In comparison with the known methods of increasing the energy efficiency of an asynchronous drive, the novelty of our approach is to change the fundamental design principle of classic motor windings. The scientific novelty lies in the fact that new principles for designing motor windings have been formulated, as well as for choosing the optimal ratios of the numbers of rotor and stator slots. On their basis, industrial designs and schemes of single-layer and double-layer combined windings have been developed, both for manual and automatic laying. Since 2011, 7 patents of the Russian Federation have been received for technical solutions. Several applications are pending at Rospatent. Applications for patenting abroad are being prepared.
In comparison with the known ones, the variable frequency drive can be made on the basis of a DSO with an increased frequency of the supply voltage. This is achieved due to lower losses in the steel of the magnetic circuit. The cost price of such a drive is significantly lower than when using standard motors, in particular, noise and vibration are significantly reduced.
During the tests carried out at the stands of the Katay Pumping Plant, the standard 5.5 kW engine was replaced with a 4.0 kW engine of our design. The pump provided all parameters in accordance with the TU requirements, while the engine practically did not heat up.
Currently, work is underway to introduce the technology in the oil and gas complex (Lukoil, TNK-BP, Rosneft, Bugulma Electric Pump Plant), in metro enterprises (International Metro Association), in the mining industry (Lebedinsky GOK) and a number of other industries.
The essence of the proposed development
The essence of the development follows from the fact that, depending on the connection diagram of a three-phase load to a three-phase network (star or triangle), two systems of currents can be obtained, forming an angle of 30 electrical degrees between the vectors of the magnetic flux induction. Accordingly, an electric motor can be connected to a three-phase network, which has not a three-phase winding, but a six-phase one. In this case, part of the winding must be included in the star, and part in the triangle and the resulting induction vectors of the poles of the same phases of the star and triangle must form an angle of 30 electrical degrees.
The combination of two circuits in one winding improves the shape of the field in the working gap of the engine and, as a consequence, significantly improves the basic characteristics of the engine. The field in the working gap of a standard motor can only be called sinusoidal. In fact, it is stepped. As a result, harmonics, vibrations and braking torques are generated in the motor, which have a negative effect on the motor and degrade its performance. Therefore, a standard induction motor has acceptable performance only at rated load. Under load other than the rated load, the performance of the standard motor will be drastically reduced and the power factor and efficiency will be reduced.
The combined windings also allow to reduce the level of magnetic induction of fields from odd harmonics, which leads to a significant reduction in total losses in the elements of the magnetic circuit of the motor and an increase in its overload capacity and power density. It also allows motors to operate at higher supply voltage frequencies when using steels rated for 50 Hz operation. Motors with combined windings have a lower multiplicity of starting currents at higher starting torques. This is essential for equipment operating with frequent and prolonged starts, as well as for equipment connected to long and highly loaded networks with a high level of voltage drop. They generate less interference in the network, and less distort the shape of the supply voltage, which is essential for a number of objects equipped with complex electronics and computing systems.
In fig. 1 shows the shape of the field in a standard 3000 rpm motor in a 24-slot stator.
The field shape of a similar motor with aligned windings is shown in Fig. 2.
It can be seen from the graphs that the field shape of a motor with aligned windings is closer to sinusoidal than that of a standard motor. As a result, as the available experience shows, without increasing labor intensity, with less material consumption, without changing existing technologies, all other things being equal, we get engines that significantly exceed standard ones in their characteristics. In contrast to the previously known methods of increasing energy efficiency, the proposed solution is the least costly and is feasible not only in the production of new engines, but also in the overhaul and modernization of the existing fleet. In fig. 3 shows how the mechanical characteristics changed from replacing the standard winding with a combined one during engine overhaul.
No other known method can improve the mechanical characteristics of the existing engine fleet so radically and effectively. The results of bench tests carried out by the Central Plant Laboratory of ZAO UralElektro-K, Mednogorsk, confirm the declared parameters. The data obtained confirm the results obtained during tests at NIPTIEM, Vladimir.
The average statistical data of the main energy indicators of efficiency and cos, obtained during testing of a batch of modernized engines, exceed the catalog data of standard engines. In combination, all of the above indicators provide motors with combined windings with characteristics that exceed the best analogs. This was confirmed even on the first prototypes of the upgraded engines.Competitive advantages
The uniqueness of the proposed solution lies in the fact that competitors, which are obvious at first glance, are, in fact, potential strategic partners. This is due to the fact that it is possible to master the production and modernization of motors with combined windings in the shortest possible time at almost any specialized enterprise engaged in the production or repair of standard motors. This does not require changes to existing technologies. To do this, it is enough to modify the existing design documentation at the enterprises. No competing product offers these benefits. At the same time, there is no need to obtain special permits, licenses and certificates. An illustrative example is the experience of cooperation with OJSC UralElektro-K. This is the first company with which a license agreement has been concluded for the right to manufacture energy-efficient induction motors with combined windings. Compared with frequency drives, the proposed technology allows you to obtain greater energy savings with significantly lower capital investments. During operation, maintenance costs are also significantly lower. Compared to other energy efficient motors, the offered product has a lower price at the same performance.
Conclusion
The field of application of asynchronous motors with combined windings covers almost all spheres of human life. About seven billion units of engines of various capacities and designs are produced annually in the world. Today, practically no technological process can be organized without the use of electric motors. The consequences of the large-scale use of this development can hardly be overestimated. In the social sphere, they can significantly reduce tariffs for basic types of services. In the field of ecology, they allow you to achieve unprecedented results. So, for example, with the same useful work, they allow three times to reduce the specific generation of electricity and, as a result, sharply reduce the specific consumption of hydrocarbons.
The unique technology of modernization with the use of combined windings of the Slavyanka type allows to increase the power and significantly reduce the energy consumption of burned-out and new asynchronous motors. Today it is being successfully implemented at several large industrial enterprises. Such modernization makes it possible to increase the starting and minimum moments by 10-20%, reduce the starting current by 10-20% or increase the electric motor power by 10-15%, stabilize the efficiency close to the nominal in a wide range of loads, reduce the no-load current, reduce by 2 , 7-3 times the losses in steel, the level of electromagnetic noise and vibrations, increase the reliability and increase the overhaul life by 1.5-2 times.
In Russia, the share of asynchronous motors, according to various estimates, accounts for 47 to 53% of the consumption of all generated electricity, in industry - on average 60%, in cold water supply systems - up to 80%. They carry out almost all technological processes associated with movement and cover all spheres of human activity. There are more asynchronous motors in each apartment than tenants. Earlier, since there was no problem of saving energy resources, when designing the equipment, they tried to “hedge their bets” and used engines with a power exceeding the calculated one. Energy saving in design faded into the background, and such a concept as energy efficiency was not so relevant. The Russian industry did not design or manufacture energy efficient motors. The transition to a market economy has dramatically changed the situation. Today, saving a unit of energy resources, for example, 1 ton of fuel in conventional terms, is half the price of producing it.
Energy-efficient motors (EM) are asynchronous EMs with a squirrel-cage rotor, in which, due to an increase in the mass of active materials, their quality, as well as due to special design techniques, it was possible to increase by 1-2% (powerful motors) or by 4-5% ( small motors) nominal efficiency with some increase in motor price.
With the advent of motors with combined windings "Slavyanka" according to the patented scheme, it became possible to significantly improve the parameters of the motors without increasing the price. Due to the improved mechanical characteristics and higher energy performance, it became possible to save up to 15% in energy consumption with the same useful work and create a variable speed drive with unique characteristics that has no analogues in the world.
Unlike standard EMs with combined windings, they have a high multiplicity of moments, have an efficiency and power factor close to the nominal in a wide range of loads. This increases the average engine load to 0.8 and improves the performance of the equipment serviced by the drive.
In comparison with the known methods of increasing the energy efficiency of an asynchronous drive, the novelty of the technology used by the people of St. Petersburg consists in changing the fundamental principle of the design of classical motor windings. The scientific novelty lies in the fact that completely new principles of designing motor windings, choosing the optimal ratios of the numbers of the rotor slots and the starter, have been formulated. On their basis, industrial designs and diagrams of single-layer and double-layer combined windings have been developed, both for manual and automatic laying of windings on standard equipment. A number of RF patents were obtained for technical solutions.
The essence of the development is that, depending on the scheme for connecting a three-phase load to a three-phase network (star or triangle), you can get two systems of currents, forming an angle of 30 electrical degrees between the vectors. Accordingly, an electric motor can be connected to a three-phase network, which has not a three-phase winding, but a six-phase one. In this case, part of the winding must be included in the star, and part in the triangle and the resulting vectors of the poles of the same phases of the star and triangle must form an angle of 30 electrical degrees between them. The combination of two circuits in one winding improves the shape of the field in the working gap of the engine and, as a consequence, significantly improves the basic characteristics of the engine.
In comparison with the known ones, the variable frequency drive can be made on the basis of new motors with combined windings with an increased frequency of the supply voltage. This is achieved due to lower losses in the steel of the motor magnetic circuit. As a result, the cost of such a drive is significantly lower than when using standard motors, in particular, noise and vibration are significantly reduced.
The use of this technology in the repair of asynchronous motors allows, due to energy savings, to recoup the costs within 6-8 months. Over the past year, only the Research and Production Association "St. Petersburg Electrotechnical Company" has modernized several dozen burned out and new asynchronous motors by rewinding the stator windings at a number of large enterprises in St. Petersburg in the bakery, tobacco industries, building materials factories and many others. And this area is developing successfully. Today, the Scientific and Production Association "St. Petersburg Electrotechnical Company" is looking for potential partners in the regions who are able to organize, together with St. Petersburg residents, a business to modernize asynchronous electric motors in their area.
Prepared by Maria Alisova.
reference
Nikolay Yalovega- the founder of technology - professor, doctor of technical sciences. A patent was filed in the USA in 1996. As of today, the validity period has expired.
Dmitry Duyunov- the developer of the methodology for calculating the layouts of the combined windings of the engine. A number of patents have been issued.
Asynchronous three-phase electric motors of the main version, energy efficient (class IE2), AIR, 7АVER series
Motors for general industrial purposes are designed to operate in S1 mode from an alternating current 50Hz, with a voltage of 380V (220, 660V). Standard degree of protection - IP54, IP55, climatic version and category of placement - U3, U2.
Energy efficiency class - IE2 (in accordance with GOST R51677-2000 and international standard IEC 60034-30).
| P, kW | 3000 rpm | 1500 rpm | 1000 rpm | 750 rpm | ||||
| electric / dv brand | weight, kg | electric / dv brand | weight, kg | electric / dv brand | weight, kg | electric / dv brand | weight, kg | |
| 0,06 | AIR 50 A4 | 3,2 | ||||||
| 0,09 | AIR 50 A2 | 3,1 | AIR 50 B4 | 3,6 | ||||
| 0,12 | AIR 50 В2 | 3,4 | AIR 56 A4 | 3,5 | ||||
| 0,18 | AIR 56 A2 | 3,6 | AIR 56 B4 | 3,9 | AIR 63 A6 | 6,0 | AIR 71 A8 | 9,3 |
| 0,25 | AIR 56 B2 | 3,9 | AIR 63 A4 | 5,6 | AIR 63 B6 | 7,0 | AIR 71 V8 | 8,9 |
| 0,37 | AIR 63 A2 | 5,6 | AIR 63 B4 | 6,7 | AIR 71 A6 | 8,1 | AIR 80 A8 | 13,5 |
| 0,55 | AIR 63 B2 | 6,7 | AIR 71 A4 | 8,3 | AIR 71 B6 | 9,7 | AIR 80 V8 | 15,7 |
| 0,75 | AIR 71 A2 | 8,6 | AIR 71 B4 | 9,4 | AIR 80 A6 | 12,5 | AIR 90 LA8 | 19,5 |
| 1,10 | AIR 71 B2 | 9,3 | AIR 80 A4 | 12,8 | AIR 80 V6 | 16,2 | AIR 90 LV8 | 22,3 |
| 1,50 | AIR 80 A2 | 13,3 | AIR 80 B4 | 14,7 | AIR 90 L6 | 20,6 | AIR 100 L8 | 28,0 |
| 2,20 | AIR 80 В2 | 15,9 | AIR 90 L4 | 19,7 | AIR 100 L6 | 25,1 | AIR 112 MA8 | 50,0 |
| 3,00 | AIR 90 L2 | 20,6 | AIR 100 S4 | 25,8 | AIR 112 MA6 | 50,5 | AIR 112 MV8 | 54,5 |
| 4,00 | AIR 100 S2 | 23,6 | AIR 100 L4 | 26,1 | AIR 112 MV6 | 55,0 | AIR 132 S8 | 62,0 |
| 5,50 | AIR 100 L2 | 32,0 | AIR 112 М4 | 56,5 | AIR 132 S6 | 62,0 | AIR 132 М8 | 72,5 |
| 7,50 | AIR 112 М2 | 56,5 | AIR 132 S4 | 63,0 | AIR 132 M6 | 73,0 | AIR 160 S8 | 120,0 |
| 11,00 | AIR 132 М2 | 68,5 | AIR 132 М4 | 74,5 | AIR 160 S6 | 122,0 | AIR 160 М8 | 145,0 |
| 15,00 | AIR 160 S2 | 122,0 | AIR 160 S4 | 127,0 | AIR 160 M6 | 150,0 | AIR 180 М8 | 180,0 |
| 18,50 | AIR 160 М2 | 133,0 | AIR 160 М4 | 140,0 | AIR 180 M6 | 180,0 | AIR 200 М8 | 210,0 |
| 22,00 | AIR 180 S2 | 160,0 | AIR 180 S4 | 170,0 | AIR 200 М6 | 195,0 | AIR 200 L8 | 225,0 |
| 30,00 | AIR 180 М2 | 180,0 | AIR 180 М4 | 190,0 | AIR 200 L6 | 240,0 | AIR 225 М8 | 316,0 |
| 37,00 | AIR 200 М2 | 230,0 | AIR 200 М4 | 230,0 | AIR 225 М6 | 308,0 | AIR 250 S8 | 430,0 |
| 45,00 | AIR 200 L2 | 255,0 | AIR 200 L4 | 260,0 | AIR 250 S6 | 450,0 | AIR 250 М8 | 560,0 |
| 55,00 | AIR 225 М2 | 320,0 | AIR 225 М4 | 325,0 | AIR 250 М6 | 455,0 | AIR 280 S8 | 555,0 |
| 75,00 | AIR 250 S2 | 450,0 | AIR 250 S4 | 450,0 | AIR 280 S6 | 650,0 | AIR 280 М8 | 670,0 |
| 90,00 | AIR 250 М2 | 490,0 | AIR 250 М4 | 495,0 | AIR 280 M6 | 670,0 | AIR 315 S8 | 965,0 |
| 110,00 | AIR 280 S2 | 590,0 | AIR 280 S4 | 520,0 | AIR 315 S6 | 960,0 | AIR 315 М8 | 1025,0 |
| 132,00 | AIR 280 М2 | 620,0 | AIR 280 М4 | 700,0 | AIR 315 М6 | 1110,0 | AIR 355 S8 | 1570,0 |
| 160,00 | AIR 315 S2 | 970,0 | AIR 315 S4 | 1110,0 | AIR 355 S6 | 1560,0 | AIR 355 M8 | 1700,0 |
| 200,00 | AIR 315 М2 | 1110,0 | AIR 315 М4 | 1150,0 | AIR 355 M6 | 1780,0 | AIR 355 MB8 | 1850,0 |
| 250,00 | AIR 355 S2 | 1700,0 | AIR 355 S4 | 1860,0 | AIR 355 MB6 | 1940,0 | ||
| 315,00 | AIR 355 М2 | 1820,0 | AIR 355 М4 | 1920,0 | ||||
The use of energy efficient motors allows:
- increase engine efficiency by 2-5%;
- reduce electricity consumption;
- increase the life of the engine and related equipment;
- increase the power factor;
- improve overload capacity;
- increase the engine's resistance to thermal loads and changes in operating conditions.
The overall, installation and connection dimensions of energy-efficient motors correspond to the overall, installation and connection dimensions of the motors of the basic design.
Energy efficient electric motors EFF1 / IE2 manufactured by ENERAL
Energy efficient electric motors EFF1 are three-phase asynchronous single-speed electric motors with squirrel-cage rotor.
Energy-efficient electric motors are electric motors for general industrial purposes, in which the total power loss is not less than 20% less than the total power loss of motors with normal efficiency of the same power and speed.
Main characteristics:
Energy efficiency class Eff 1 meets IE2 standard
Technical characteristics of energy efficient motors produced by ENERAL are presented in the table:
| Eff1 | Power | Efficiency | cos | Rated current, A | The multiplicity of the maximum torque | Multiplicity of current with a closed rotor | The multiplicity of the moment with a closed rotor | Rotational speed |
| AIR132M2 | 11 | 90,29 | 0,925 | 20,96 | 3,07 | 6,86 | 2,11 | 2905 |
| AIR132M4 | 11 | 90,39 | 0,8495 | 20,87 | 2,51 | 6,74 | 2,26 | 1460 |
| AIR160S2 | 15 | 91,3 | 0,89 | 28 | 2,3 | 8 | 2,2 | 2945 |
| AIR160S4 | 15 | 91,8 | 0,86 | 28,9 | 2,3 | 7,5 | 2,2 | 1475 |
| AIR160S6 | 11 | 90 | 0,79 | 23,5 | 2,1 | 6,9 | 2,1 | 980 |
Comparison of characteristics:
Asynchronous electric motors with a squirrel-cage rotor currently constitute a significant part of all electrical machines, more than 50% of the electricity consumed is accounted for by them. It is almost impossible to find a field wherever they are used: electric drives for industrial equipment, pumps, ventilation technology and much more. Moreover, both the volume of the technological park and the power of the engines are constantly growing.
Energy-efficient motors ENERAL of the AIR… E series are designed as three-phase asynchronous single-speed motors with a squirrel-cage rotor and comply with GOST R51689-2000.
The energy-efficient motor of the AIR ... E series has increased efficiency due to the following system improvements:
1. Increased mass of active materials (copper stator winding and cold-rolled steel in stator and rotor packages);
2. Electrotechnical steels with improved magnetic properties and reduced magnetic losses are used;
3. The toothed-groove zone of the magnetic circuit and the design of the windings have been optimized;
4. Used insulation with increased thermal conductivity and electrical strength;
5. Reduced air gap between rotor and stator with high-tech equipment;
6. A special fan design is used to reduce ventilation losses;
7. Higher quality bearings and lubricants are used.
New consumer properties of the AIR ... E series energy efficient engine are based on design improvements, where special attention is paid to protection from adverse conditions and increased sealing.
Thus, the design features of the AIR ... E series allow minimizing losses in the stator windings. The low temperature of the motor winding also prolongs the life of the insulation.
An additional effect is the reduction of friction and vibration, and hence of overheating, due to the use of high-quality grease and bearings, including a denser bearing lock.
Another aspect associated with a lower engine running temperature is the possibility of operating at a higher ambient temperature or the possibility of reducing the costs associated with external cooling of the running engine. It also leads to lower energy costs.
One of the important advantages of the new energy efficient motor is the reduced noise level. IE2 motors use less powerful and quieter fans, which also plays a role in improving aerodynamic properties and reducing ventilation losses.
Minimizing capital and operating costs are key requirements for industrial energy efficient electric motors. As practice shows, the period of compensation due to the difference in prices when purchasing more advanced asynchronous electric motors of the IE2 class is up to 6 months only by reducing operating costs and consuming less electricity.
Reducing costs when replacing an engine with an energy efficient one:
AIR 132M6E (IE2) P2 = 7.5kW; Efficiency = 88.5%; In = 16.3A; cosφ = 0.78
AIR132M6 (IE1) P2 = 7.5kW; Efficiency = 86.1%; In = 17.0A; cosφ = 0.77
Power consumption: P1 = P2 / efficiency
Load characteristic: 16 hours a day = 5840 hours a year
Annual energy savings: 1400 kWh
When switching to new energy efficient motors, the following are taken into account:
- increased requirements for environmental aspects;
- requirements for the level of energy efficiency and product performance;
- energy efficiency class IE2, along with savings opportunities, acts as a unified "quality mark" for the consumer;
- financial incentive: the ability to reduce energy consumption and operating costs complex solutions: energy efficient motor + efficient control system (variable speed drive) + effective protection system = best result.
Advantages:
Provide a reduction in total power losses by at least 20% in relation to motors with normal efficiency of the same power and speed;
- Increased efficiency in partial load mode (by 1.8 - 2.4%);
- Have improved performance characteristics:
- more resistant to network fluctuations;
- less overheating, less energy loss;
- work with a reduced noise level;
- Increased reliability and extended service life;
- With a higher purchase cost (by 15-20% compared to the standard one), EED pays off the additional costs by reducing energy consumption already in 500-600 operating hours;
- Reduced overall operating costs.
Thus, energy efficient motors are highly reliable motors for enterprises focused on energy saving technologies.
Energy efficiency indicators of AIR… E electric motors produced by ENERAL comply with GOST R51677-2000 and the international standard IEC 60034-30 for energy efficiency class IE2.
