What is YE4 Three-phase Asynchronous Motor?
The YE4 high efficient three-phase asynchronous motor is a squirrel cage induction motor that meets the IE4 energy efficiency class under IEC 60034-30-1 and GB 18613-2020. Covering frame sizes H80 to H450 and a power range of 0.75 kW to 1000 kW, it operates across voltage options including 380V, 400V, and 415V. Compared with IE3-class motors, the YE4 series delivers an average efficiency gain of 2–3 percentage points, and roughly 6% over standard IE2 motors, translating directly into lower electricity bills and reduced carbon output across continuous industrial operations.
Series：YE4
Frame number: 80-450
Power range：0.75-1000kW
Protection level：IP55
Energy efficiency class: IE4
Voltage range: 380V,400V,415V, 660V，etc.
Application:can be used in various fields of the national economy, such as machine tools,water pumps,fans,compressors,and can also be used in transportation, mixing, printing, agricultural machinery, food and other occasions that do not contain flammable, explosive or corrosive gases.
Certificate: international standard IEC60034-30 "Efficiency Classification of Single-speed Three-Phase Squirrel Cage Induction Motors".
Advantage:The high quality of the electric motor guarantees high operational reliability.
Others: SKF, NSK, FAG bearings can be replaced according to customer requirements.
Understanding the YE4 High Efficient Three-Phase Asynchronous Motor
The YE4 series is based on a single idea: providing the highest level of efficiency without sacrificing mechanical strength. That goal is reflected in every design choice, from the stator coil to the material of the shaft.
Core Technical Specifications
From frame sizes H80 to H450, the motor can handle speeds from 500 to 3000 rpm and outputs from 0.75 kW to 1000 kW. It can be set up with 2 to 12 poles. The standard level of protection is IP55, but you can also get IP56 and IP65. Class F insulation (155 °C) is standard, and class H insulation (180 °C) is better for warmer environments.
How the IE4 Efficiency Class Is Achieved
Because it has 99.9% pure copper stator windings, high-grade silicon steel laminations, and an optimized aluminum-cast rotor, the YE4 high efficient three-phase asynchronous motor cuts down on both copper loss and iron loss. This makes an efficiency graph that is pretty flat from 50% load to 100% load, which is exactly the range that most industrial processes run in every day.
Voltage Flexibility and Certification
The YE4 series comes in 380V, 400V, 415V, 460V, 660V, and 690V options. Its mounting dimensions are in line with IEC standards (B3/B5/B35/V1), and it is certified by CE, ISO 9001:2015, and GOST. This makes it easy for OEM equipment makers that want to sell in Europe and the CIS to buy goods across borders with ye4 motors for automation systems.
Key Differences Between YE4 and Other Asynchronous Motors
People who work in procurement often wonder why moving from an IE2 or IE3 motor is worth the money. To find the answer, you need to look at measured performance gaps and the total cost of ownership over the life of a motor.
Efficiency Gap vs. IE2 and IE3 Classes
About 6% more efficient is a YE4 high efficient three-phase asynchronous motor than a similar IE2 unit, and 2–3% more efficient is an IE3 unit. A 75 kW motor that runs for 6,000 hours a year at $0.10/kWh would save about $1,350 a year if it were 3% more efficient, and that's before the lower cooling load is taken into account.
Construction Quality Differences
Copper windings are hand-fitted into the YE4 motor to make sure that every hole is fully filled. This gets rid of winding gaps that cause hot spots. The rotor shaft is precisely machined to be strong and resistant to twisting. Bearings from SKF, NSK, or FAG are standard, and the customer can ask for a different brand. Most normal IE2 goods don't have these details or you can choose not to have them.
Maintenance and Operational Longevity
In the YE4 design, bearing and insulation wear out more slowly because core losses and thermal stress are lower. Before it is painted and packed, each motor is tested as a separate unit, and type tests are done regularly for each series. That level of discipline in output means that the customer's production floor has fewer unexpected shutdowns.
Applications and Industry Use Cases of YE4 Three-Phase Motors
With a power range of 0.75 kW to 1000 kW, a single motor series can handle almost all of a plant's driven loads. The YE4 high efficient three-phase asynchronous motor consistently works well in the following areas:
- Water and wastewater treatment: Pump motors run continuously at partial load; the flat efficiency curve of the YE4 prevents excessive energy waste during off-peak hours.
- Cement and mining: High-inertia fans and conveyors demand robust shaft design and sustained torque. The precisely machined shaft and silicon steel rotor core handle these loads without overheating.
- Chemical and petrochemical processing: The IP55 sealed housing resists dust and moisture ingress in environments where corrosive particles are present, though the motor is not rated for flammable or explosive atmospheres.
- Food, textile, and printing machinery: Lower vibration levels and reduced audible noise matter in precision or food-grade production lines, and the YE4 design addresses both.
- HVAC and compressor systems: Variable load profiles in HVAC benefit directly from the motor's efficiency at partial loads.
These use cases are very similar to the ones that energy service companies (ESCOs) do contract energy management (EMC) projects for, like the cement, chemical, mining, and power industries. Replacing an old fleet of IE2 motors with IE4-class motors is one of the fastest ways for a project director to get their money's worth in energy savings.
Procurement Guide for YE4 High Efficient Three-Phase Asynchronous Motors
It's not enough to just compare nameplate efficiency when looking for a motor for an energy upgrade or an OEM production line. Several practical factors show if a provider can really help you with your job.
Matching Power Range to Project Scope
The ye4 series electric motor YE4 series has a single consistent product family that ranges from 0.75 kW to 1000 kW. This means that a project head can make sure that all of a plant's paperwork, spare parts inventory, and installation processes are the same, instead of having to manage different motor brands or series.
Documentation for Audit and Certification
There is a factory test record for efficiency, power factor, and temperature rise that comes with every YE4 high efficient three-phase asynchronous motor. This paperwork helps with three of the most common problems in the approval process for buying things: government energy audits, CE marking on OEM machines, and internal EHS compliance reviews at multinational factory sites.
Warranty Period and After-Sales Support
A warranty period of at least three years is in line with how long most EMC contracts last. Making it clear how to pay for problems that are covered by the guarantee protects the project's slice of the energy savings. When a motor fails and output stops, XCMOTOR's dedicated expert help is important, available seven days a week, even on weekends.
Future Trends in High-Efficiency Three-Phase Asynchronous Motors
Around the world, rules are getting stricter on how efficient motors can be. Starting in 2023, the EU's Ecodesign Regulation (EU) 2019/1781 made IE4 requirements cover a wider range of power levels. The minimum efficiency requirement was also raised in China's GB 18613-2020 standard. These changes make IE4-class motors go from being the "best available option" to being the "mandatory minimum" in a lot of different types of applications.
Each new wave of IE4 products has a slightly higher efficiency because the materials used are better. This is especially true for electrical steel types and winding insulation compounds. More and more motor-drive systems are being combined with variable frequency drives (VFDs). This is because combined motor-drive systems can dynamically meet the load, which makes the saves from high base efficiency even bigger. If a procurement team can find a supplier with proven IE4 production capacity now, they will be in a better position when IE5 Ultra Premium standards start to be regulated nationally.
Conclusion
While the YE4 high efficient three-phase asynchronous motor works with power levels from 0.75 kW to 1000 kW, it also meets the IE4 efficiency standards set out in IEC 60034-30-1 and comes with full test documentation for energy audits and export certifications. Compared to IE2 and IE3 alternatives, its construction—copper windings, silicon steel rotor core, precision shaft, and IP55 housing—significantly lowers the amount of electricity used and thermal stress. The YE4 series meets the most important technical and business needs without sacrificing quality. It's perfect for project directors working on EMC contracts, OEM equipment builders going after controlled export markets, or plant engineers in charge of a compliance-driven motor replacement program.
FAQ
1.Does the YE4 motor's efficiency hold up under partial load?
Yes. From 50% of rated load to 100% of rated load, the YE4 high efficient three-phase asynchronous motor keeps its efficiency pretty flat.
2.Can the voltage be customized for export projects?
380V, 400V, 415V, 460V, 660V, and 690V are the standard voltages. South Asia and the Middle East can use the 415V/50Hz version, while North America can use the 460V/60Hz version for OEM purposes. You can get custom voltage settings if you ask for them.
3.What bearing brands are installed, and can they be changed?
The most common types of bearings are SKF, NSK, and FAG. Customers can choose which brand they want during the order process. This makes it easier for facilities that already stock one of those brands to handle extra parts.
4.How complete is the factory test documentation?
Before it is painted and packed, each unit goes through a piece testing process. Type tests are done regularly for each series and more often for newly created variants. The full efficiency test report comes with the motor and is set up so that it can be used for government energy checks and studies by third parties.
5.What is the lead time for a bulk order?
Lead time depends on the number and size of frames you want. For a production plan that fits your order number, email xcmotors@163.com or go to motorxc.com and ask for one.
Partner with XCMOTOR for Your Next Motor Project
The YE4 high efficient three-phase asynchronous motor is sold by XCMOTOR to commercial buyers all over the world. The company has been making motors for over 20 years and has CE and ISO 9001:2015 certifications, as well as a three-year guarantee with clear terms for after-sales service. As a YE4 high efficient three-phase asynchronous motor supplier partner, our team can help you seven days a week, whether you need a single replacement unit or a bulk sale agreement. To get a price right away, email your specs to xcmotors@163.com or go to motorxc.com.
References
1. International Electrotechnical Commission. IEC 60034-30-1: Rotating Electrical Machines – Efficiency Classes of Line Operated AC Motors. IEC, 2014.
2. Standardization Administration of China. GB 18613-2020: Energy Efficiency Limits and Energy Efficiency Grades for Small and Medium-Sized Electric Motors. SAC, 2020.
3. European Commission. Commission Regulation (EU) 2019/1781 Laying Down Ecodesign Requirements for Electric Motors and Variable Speed Drives. Official Journal of the European Union, 2019.
4. de Almeida, A. T., Ferreira, F. J. T. E., & Baoming, G. "Beyond Induction Motors—Technology Trends to Move Up Efficiency." IEEE Transactions on Industry Applications, 2014.
5. Waide, P., & Brunner, C. U. Energy-Efficiency Policy Opportunities for Electric Motor-Driven Systems. International Energy Agency, 2011.
6. Ferreira, F. J. T. E., & de Almeida, A. T. "Method for In-Field Evaluation of the Stray-Load Losses and Efficiency of Three-Phase Induction Motors." IEEE Transactions on Energy Conversion, 2009.
