Combined winding "Slavyanka"

Revolution in the field of electric motors

About the combined winding technology "Slavyanka"

The combined winding technology "Slavyanka" is applicable for most types and kinds of electrical rotating machines, both single-phase and three-phase ones. In their classic version, these motors are designed with either a "star" or "delta" winding.

The peculiarity of "Slavyanka" is combining two winding types in one electric motor. "Star" and "Delta" are combined in parallel with a 30-electrical-degree shift of the resultant electromagnetic induction vectors.

The combined winding was named "Slavyanka". Motors with this winding type have unique performance features and outperform all the world rivals available in the market.



Advantages of electric motors with "Slavyanka"

The data is based on the results of conducted tests
Energy saving
Energy saving up to 40%
Reducing production cost
Reducing production cost
信度(服務係數 2.5)
Increasing starting torque
Increasing starting torque
Reducing starting currents
Reducing starting currents
Reducing noise and vibration
Reducing noise and vibration 1.5-2 times

Improved energy efficiency class

多虧有這項結合繞線技術,「Sovelmash」不用增加生產成本,就能在 IE1 等級的殼架上,打造出 IE4 等級的馬達。因此,此刻必須解決的關鍵環保問題就是:耗能猖獗成長翻倍。

Scope of application

Electric motors with the "Slavyanka" technology have been acknowledged in various areas
  • 電動腳踏車
  • Electric mopeds
    Electric mopeds
  • Electric motorcycles
    Electric motorcycles
  • Electric cars
    Electric cars
  • Public transport
    Public transport
  • 電動機車
  • Machine tools
    Machine tools
  • Measuring and testing equipment
  • 幫浦
  • Ventilation
  • Crane lifting equipment
    Crane equipment
  • Conveyor belt lines
    Conveyor belt lines
  • Wind turbines
    Wind turbines
  • Hydroelectric power plants
    Hydroelectric power plants
  • Thermal power stations
    Thermal power stations
  • Nuclear power plants
    Nuclear power plants
  • Mobile power generating units
    Mobile power generating units
  • Renewable energy industry
    Renewable energy industry
  • Fridges
  • Washing machines
    Washing machines
  • Vacuum cleaners
    Vacuum cleaners
  • Dishwasher
  • Ventilators
  • Microwave oven
    Microwave oven
  • Agricultural equipment and machinery
    Agricultural equipment and machinery
  • Construction equipment and machinery
    Construction equipment and machinery
  • Medical equipment
    Medical equipment
  • Ships, yachts, motor boats
    Ships, yachts, motor boats
  • Military equipment
    Military equipment
  • Aviation


The validity of all the documents can be checked in the official sources by following the link

Studies of electric motors with "Slavyanka"

The technology efficiency has been confirmed by independent tests
The "Slavyanka" technology has proven its efficiency in the course of tests conducted at different times by experts of various scientific institutions and industrial enterprises. The testing results for the induction electric motors with combined winding supplemented by the official test reports are presented in this section.
  • Testing
    University Düsseldorf, 2016
    Comparative tests of the general purpose industrial motor rewound by applying the "Slavyanka" technology. University Düsseldorf

    Independent tests of general purpose industrial motors were conducted in the Higher School at University Düsseldorf.

    The task was to test the original motor and then rewind it using the "Slavyanka" technology, test the modernized motor and compare the results.

    A 7.5 kW motor was provided for the tests. The tests demonstrated that after the "Slavyanka" technology modernization it: <br>- had a 30% bigger torque, <br>- consumed up to 30% less electrical energy.

    You can view the test reports here -

  • Testing
    University of Bologna, September 2013
    Comparative tests of the "Slavyanka"-rewound motor. University of Bologna, September 2013

    The task of the test was creating a combined winding motor for electric buggies based on the "Slavyanka" technology and conduct comparative testing of it against the standard motor.

    The standard motor made specially for the buggy weighed 54 kg and had a copper rotor. A general purpose industrial motor weighing 27 kg with an aluminium rotor was chosen for testing the "Slavyanka" technology.

    Its performance characteristics: 4 polar size-100 AEG motor, 3 kW, with 86% efficiency and IE2 energy efficiency class. For the tests, the controller developed at the University was used that synchronized perfectly well with the motor rewound using Duyunov's technology.

    The tests were conducted in three different modes: • nominal 135 A, • 270 A, • 350 A.

    As a result, the modified motor fell short by 1 kW of the nominal power and by 1 kW of the maximum power. The previous motor for electric buggies produced the power of 20 kW at 350 Amperes, and 19 kW - with the combined winding.

    There were differences in the efficiency values too: the electric buggy motor - 91%, the modified general-purpose industrial motor with "Slavyanka" – 89%.

    Victor Arestov, who was running the tests, admitted that the choice of motor for the tests was not fully correct. To achieve the planned results, a size 112 motor should have been chosen instead of a size 100 one to, with a higher power of 4 kW.

    However, it should be taken into consideration that the weight difference of the motors was almost twofold, and the special motor for electric buggies had a copper rotor while the modified motor had an aluminium one (by replacing the aluminium rotor with a copper one, you can increase efficiency by 2-3%).

    At the same time, the 27-kg combined winding motor demonstrated almost the same performance as the specially developed original motor weighing 54 kilograms!

    You can view the test reports here -

  • Testing
    Belgorod University, 2016
    Comparative tests of induction electric motors. Belgorod University, 2016

    Belgorod State Technological University hosted comparative tests of two induction electric motors AIR 71V4.

    The goal of the procedure was checking the stated performance of the motor AIR 71V4 modernized using the "Slavyanka" technology as compared to a similar factory-manufactured motor with the standard three-phase winding.

    In the course of the tests, reduced noise level and heating temperature of the modified motor was noted. The tests demonstrated considerable performance improvement of the modified electric motor in virtually all operational modes as well as improved efficiency in a wider load range.

    It was concluded that in the process of real-life operation, the combined winding motor would enable significant reduction of power consumption by 14-20%. The largest saving amount could be achieved in the electric drive operation modes with the motor load lower than nominal. Besides, reducing starting and nominal currents, decreasing the operational temperature of the stator winding, reducing the internal conductor vibration in the coils and stator slots would considerably slow down the rate of conductor insulation wear.

    The researchers recommended the "Slavyanka" technology for repairing induction electric motors at industrial enterprises with the purpose of considerable energy saving.

    The test report is available here

  • Testing
    Belgrade quarry, 2015
    Testing the motor with "Slavyanka". Belgrade, October 7, 2015

    The goal of the tests was to determine how the electric motor performance changed after replacing the traditional winding with the "star-delta" combination.

    The Serbian company D.O.O. «Savian» received a 15 kW induction electric motor with a burnt winding for modernization. The motor had been used in a rock quarry. The motor owner, the company D.O.O. Kuevo, ordered a full-fledged repair that included changing the winding type.

    As a result of applying the energy-saving "Slavyanka" technology, the modernized motor performance changed as follows.

    The nominal power increased from 15 kW to 19 kW, i.e., by 26.6%.

    No-load currents were not detected before the repair, since the motor was inoperable. According to the motor certificate, the value was 27 A, and after modernization it decreased to 13.4 A.

    The conducted tests graphically demonstrated the energy efficiency of the "Slavyanka" technology. Chief Technology Officer at D.O.O. Kuevo confirmed the operational reliability of the modernized motor.

    You can view the test report here

  • Testing
    Russian plant, July 2016
    Tests of the modernized motor for a drain pump. Russia, July 2016

    Engineers of the Russian plant modernized the induction electric motor 5AI160M2U2 with the power of 18.5 kW installed in a drain pump. During the repair, the blown old winding was replaced by burning, and the motor was rewound using the patented "Slavyanka" technology.

    The goal of the tests is to identify changes in the motor performance characteristics after modernization.

    Before the repair, the 5AI160M2 motor was designed to operate at the voltage of 660V, after modernization it was powered from 380V mains electricity. At 500V supplied in the laboratory conditions, the no-load current reduced on average by 12% (from 27.3 A to 24.0 A). When operating at 380V, the no-load current reduced by 3%, and under load — by 2%.

    After rewinding, the pump productivity increased (duration of the pump operation cycle reduced by 39 seconds). It resulted in reduction of the required motor operation time by 8%. The total energy saving per one motor switch-on amounted to 12 %. The consumed power when draining the tank before rewinding was 2.573 kW, after rewinding it decreased to 2.3368 kW. The saving was 10%.

    The test results confirmed the efficiency of the combined winding technology "Slavyanka".

    The test reports and explanations for them are available here

  • Testing
    The Saint Petersburg Metro, October 2015
    Tests of the motor modernized using the "Slavyanka" technology. The Saint Petersburg Metro, October 2015

    At the request of the production technology department of the Saint Petersburg Metro, the workers of electromechanical service modernized an inoperable electric motor of a ventilation unit in a powerful tunnel ventilation system by applying the energy-saving "Slavyanka" technology.

    The goal of the tests was to identify the changes in the performance characteristics of the motor after modification.

    The type of the repaired electric motor produced in 1975 — 5AM280S8Y3. Its power before the breakdown was 55 kW, current — 108 A, speed — 740 revolutions per minute, voltage — 380 V.

    After the repair, the experimental motor was installed in V-1 unit. As a result of the tests, the commission determined the following performance characteristics of the modernized motor with the "Slavyanka" winding: the running current was 48 A; the starting current amounted to 359 A.

    The tests confirmed that modernizing electric motors using Duyunov's technology increased their energy efficiency.

    The document clarifying the course and results of the tests is available here

Practical application of the "Slavyanka" technology

The technology has been successfully applied since 1995
  • Using
    KAMAZ with the modernized generator
    KAMAZ with the modernized generator

    In summer 2017, the generator of "KAMAZ" from the "KAMAZ-Master" sports team was rewound using the "Slavyanka" technology. The rewinding made it possible to increase the generator power almost by 30%.

    The modernized "KAMAZ" with Anton Shibalov's team took part in the 2017 Dakar Rally in South America with the route running through Paraguay - Bolivia - Argentina.

    The "KAMAZ-Master" team was happy with the improvement, later the generators of the other cars were rewound for the 2018 Dakar Rally!

    Besides, it was decided to apply the "Slavyanka" technology for the windscreen wipers motor of the racer KAMAZ cars.

    The "KAMAZ-Master" generators were modernized by the company OOO "Electrocomplex", the licensee of OOO "ASiPP".

  • Using
    "ZAZ" electric car
    Electric car ZAZ-966 with Duyunov's motor

    ААвтомобиль Запорожец был оснащен двигателем, модернизированным по технологии «Славянка», специально для марафона электромобилей «Киев — Монте-Карло» в 2015 году.

    In Odessa, the founders of the "Ecofactor" project fully modernized the car within 3 weeks by changing the internal parts and leaving only the bodyshell intact.

    In the race, the Odessan team crossed 10 countries and covered the distance of almost 3000 kilometres. At one of the route legs, ZAZ managed to overtake the Tesla electric car. There were no troubles with the electric car on the route, except for some minor loose ends that were quickly eliminated.

    Zaporozhets was the fifth overall to arrive to the finish line and the second among the modernized electric cars. The Odessan electric car also won the people's choice award. Besides, the founder of the race, prince of Monaco Albert, paid attention to ZAZ, noting a very authentic exterior of the Ukrainian car.

    Promo video about modernizing ZAZ —

  • Using
    Mining electric locomotive "Era"
    Mining electric locomotive Era

    Electric locomotive Era is a vehicle used for freight transportation in the mines on a narrow-gauge railway.

    In 2013, in Donetsk Era was equipped with a size-112 motor modernized using the "Slavyanka" technology instead of the original factory-supplied DRT-13, as well as a Сurtis controller.

    The running tests demonstrated the following performance of the mining electric locomotive: it pulled 11 cars with coal while the previous one pulled 5, the speed was 12 km/h on a flat level surface and 7 km/h uphill, when transporting 100 tons of coal, the motor didn't overheat, despite the load increased two times.

    Duyunov's development increased labour productivity of Donetsk miners twice alongside a considerable decrease in power consumption. The specialists also noted considerable reduction of high-frequency harmonics and reactive component in mains electricity that powered the traction step-down substations.

  • Using
    "Tavria" with Duyunov's motor
    Tavria with Duyunov's motor

    In 2014, the citizen of Belgorod region Igor Korkhov modernized the general purpose industrial motor in size 100 by rewinding it using the "Slavyanka" technology. As a result, the motor became 10 times more powerful with a comparatively light weight of 29 kilograms.

    Before modernization, the motor power was 4 kW, and after - increased up to 12-13 kW, with the maximum of 50 kW.

    "Igor Korkhov equipped the Tavria car with a modernized motor. The heavy car started quite vigorously in both first and third gear, while running very quietly. The maximum speed of the car amounted to 110 km/h, and it could run about 100 kilometres on a single charge ."

    Igor Korkhov started modernizing Tavria back in the beginning of 2000s. The car had already been equipped with an electric motor, but the engineer wasn't satisfied with the speed that didn't exceed 50 km/h. So, he first equipped Tavria with an American commutator electric motor, and then - with a combined winding motor completed with a Curtis controller.

    Tavria 至今仍在運作中,早已有了新主人。Igor Korkhov 已成為 Duyunov 團隊成員,目前在綠城行政區「 Sovelmash」工作。

    Video about Tavria on Life News -

  • Using
    Trolleybus in Kiev
    Trolleybus in Kiev

    In 2014, in Kiev at the premises of "KyivPasTrans", a trolleybus with a motor modernized using the "Slavyanka" technology was tested.

    The modified drive increased the trolleybus speed and reduced power consumption. The project was terminated due to the unfavourable events in Ukraine.

  • Using
    Citroёn with Duyunov's motor
    Citroёn with Duyunov's motor

    In 2017, Dmitriy Duyunov's partner, Victor Arestov, in Germany installed a motor rewound using the "Slavyanka" technology in an old Citroën electric car.

    The modernized electric car impressed the audience with fast start from rest, fast run and maneuverability. The car charge is enough for one hour.

    Citroën performance after modernizing the motor:

    Weight — 750 kg
    Battery — 14 kWh
    Controller Curtis 1238 96 V
    Average charge consumption — 9.6 kWh per 100 km
    Consumption in urban areas — 7.2 kWh per 100 km
    Single charge range — up to 180 km
    Maximum speed — 130 km/h

    Modernizing the electric motor by applying the "Slavyanka" technology for Citroën resulted in considerable enhancement of the key performance features.

    Video from Victor Arestov engaged in modernizing the electric car

    One of the reports about Citroën in German

Small-scale production

Purchase the electric motors with "Slavyanka" to experience the efficiency of the innovation first-hand
The small-scale production of motors implemented by applying the modernization potential of standard electric motors through changing the classic winding to combined winding is carried out by ASPP Weihai. The enterprise operates in China under license issued by OOO "ASiPP". The company produces various modifications of traction motors for electric vehicles.

DA-90S electric motor

Induction motor produced in China and modified using the "Slavyanka" technology
  • Motor type: induction motor
  • Nominal power: 3 kW (3300 rev/min)
  • Peak power: 9.5 kW
  • Continuous current (maximum value): 60 A (phase current)
  • Peak current: 350 A
  • Nominal voltage: 72 V
  • Maximum speed: 5000 rev/min
  • Efficiency: 92 %
  • Torque (maximum value): 74 Nm (on the shaft)
  • Weight: 10.5 kg
  • No magnetic resistance
  • Improving efficiency within the whole load range

DA-90SM 電動馬達

Induction motor produced in China and modified using the "Slavyanka" technology
  • Motor type: induction motor
  • 額定功率:4 kW (3300 rpm)
  • 最大功率:10 kW
  • 長期電流(最大值):80 A(相電流)
  • Peak current: 350 A
  • Nominal voltage: 72 V
  • Maximum speed: 7000 rev/min
  • Efficiency: 92 %
  • Torque (maximum value): 74 Nm (on the shaft)
  • 重量:11.2 kg

DA-95S 電動馬達

Induction motor produced in China and modified using the "Slavyanka" technology
  • Motor type: induction motor
  • 額定功率:5 kW (3300 rpm)
  • Peak power: 14.5 kW
  • 275 A 的力矩為 83.3 Nm
  • 長期電流(最大值):80 A(相電流)
  • Peak current: 350 A
  • Nominal voltage: 72 V
  • Maximum speed: 7000 rev/min
  • 效率:95 %
  • 力矩(最大值):106 Nm(軸上)
  • 重量:14 kg

DA-112S 電動馬達

Induction motor produced in China and modified using the "Slavyanka" technology
  • Motor type: induction motor
  • Nominal power: 7 kW (3200 rev/min)
  • Peak power: 21 kW
  • 定電流:120 A(相電流)
  • 峰值電流:550 A
  • Nominal voltage: 72 V
  • 最大速度:7500 rpm
  • Efficiency: 91 %
  • 力矩(最大值):151 Nm(軸上)
  • 重量:23 kg

DA-112SL electric motor

Induction motor produced in China and modified using the "Slavyanka" technology
  • Motor type: induction motor
  • Nominal power: 12 kW (3200 rev/min)
  • Peak power: 36 kW
  • Continuous current: 260 A (phase current)
  • Peak current: 650 A
  • Nominal voltage: 72 V
  • Maximum speed: 7000 rev/min
  • Efficiency: 93 %
  • Torque (maximum value): 210 Nm (on the shaft)
  • Weight: 35 kg
  • No magnetic resistance
  • Improving efficiency within the whole load range
The following vehicles with the "Slavyanka" electric motor are available for purchasing:
Electric motorcycle
SPECIFICATION scooter with DA-90S electric motor
Electric motorcycle
Denzel Liberty 電動機車撘載 DA-95S 馬達
Electric motorcycle
SUZUKI AX-100 electric motorcycle with DA-90S electric motor
Electric motorcycle
咖啡賽車手的電動機車撘載 DA-95S 馬達
Electric car
Golf car with DA-100SL electric motor and solar battery
Where can you buy combined winding motors?

Mass media about the "Slavyanka" technology

Reputable periodicals paid their attention to the technology
  • Mass media about the project
  • Mass media about the project
  • Mass media about the project
  • Mass media about the project
  • Mass media about the project
  • Mass media about the project
  • Mass media about the project
  • Mass media about the project