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Product Description

YE2/YE3 are the high-efficiency series developed by our company by combing many years of experiences in the production of special motors of our company and ZheJiang Electrical Apparatus Research Institute, and adopting new technologies, processes and materials, in line with the newest energy efficiency rate standards in IEC6-2012 and in accordance with “Test Determination for Rotating Motor’s Loss and Efficiency” in the second part of IEC60034-2 Rotating Motor. Adopting a squirrel-cage structure and insulation class F, the series has such advantages as reliable operation and maintenance convenience, whose mounting dimension and power level both meet standards of IEC.  

Rated power: 3~315KW
Rated voltage: 380V/415V/690V
Reference frequency: 50Hz/60HZ
Cooling mode: IC411
Insulation class: F
Protection class: IP54/IP55
Environment temperature: -15ºC~40ºC
Altitude: no more than 1,000m
Connection mode: Y-connection for the ones with a power of 3kW or below; △-connection for the ones with a power of 4kW or above
Basic structural form: B3, B5, B35, B14, B34
Nominal Minimum Energy Efficiency Requirement for Energy Efficiency of IE2/IE3 Motor (50Hz)



Number of poles
2 4 6 2 4 6
0.75 77.4 79.6 75.9 80.7 82.5 78.9
1.1 79.6 81.4 78.1 82.7 84.1 81.0
1.5 81.3 82.8 79.8 84.2 85.3 82.5
2.2 83.2 84.3 81.8 85.9 86.7 84.3
3 84.6 85.5 83.3 87.1 87.7 85.6
4 85.8 86.6 84.6 88.1 88.6 86.8
5.5 87.0 87.7 86.0 89.2 89.6 88.0
7.5 88.1 88.7 87.2 90.1 90.4 89.1
11 89.4 89.8 88.7 91.2 91.4 90.3
15 90.3 90.6 89.7 91.9 92.1 91.2
18.5 90.9 91.2 90.4 92.4 92.6 91.7
22 91.3 91.6 90.9 92.7 93.0 92.2
30 92.0 92.3 91.7 93.3 93.6 92.9
37 92.5 92.7 92.2 93.7 93.9 93.3
45 92.9 93.1 92.7 94.0 94.2 93.7
55 93.2 93.5 93.1 94.3 94.6 94.1
75 93.8 94.0 93.7 94.7 95.0 94.6
90 94.1 94.2 94.0 95.0 95.2 94.9
110 94.3 94.5 94.3 95.2 95.4 95.1
132 94.6 94.7 94.6 95.4 95.6 95.4
160 94.8 94.9 94.8 95.6 95.8 95.6
200~375 95.0 95.1 95.0 95.8 96.0 95.8

Nominal Minimum Energy Efficiency Requirement for Energy Efficiency of IE2/IE3 Motor (60Hz)

Number of poles
2 4 6 2 4 6
0.75 75,5 * 82,5 80,0 77,0 * 85,5 82,5
1.1 82,5 84,0 85,5 84,0 86,5 87,5
1.5 84,0 84,0 86,5 85,5 86,5 88,5
2.2 85,5 87,5 87,5 86,5 89,5 89,5
3.7 87,5 87,5 87,5 88,5 89,5 89,5
5.5 88,5 89,5 89,5 89,5 91,7 91,0
7.5 89,5 89,5 89,5 90,2 91,7 91,0
11 90,2 91,0 90,2 91,0 92,4 91,7
15 90,2 91,0 90,2 91,0 93,0 91,7
18.5 91,0 92,4 91,7 91,7 93,6 93,0
22 91,0 92,4 91,7 91,7 93,6 93,0
30 91,7 93,0 93,0 92,4 94,1 94,1
37 92,4 93,0 93,0 93,0 94,5 94,1
45 93,0 93,6 93,6 93,6 95,0 94,5
55 93,0 94,1 93,6 93,6 95,4 94,5
75 93,6 94,5 94,1 94,1 95,4 95,0
90 94,5 94,5 94,1 95,0 95,4 95,0
110 94,5 95,0 95,0 95,0 95,8 95,8
150 95,0 95,0 95,0 95,4 96,2 95,8
185 up to 375 95,4 95,0 ** 95,0 95,8 96,2 95,8

1. Novel design
2. Excellent starting performance
3. High starting torque
4. Low noise
5. Little vibration
6. Safe operation
7. Easy maintenance

Main process flow of the motor
Motor stator: casing processing → punching press → iron core seating → coil making → weaving → dipping paint drying
Electronic rotor: blank shaft processing → iron core press installation → iron core cast aluminum → rotor string shaft → weave → dipping paint drying → dynamic balance
Motor assembly: stator rotor assembly → machine test → motor appearance coloring → packaging storage

The motor products manufactured by our company have obtained the ISO9001 quality management management system certification, passed the CCC/COC, China energy-saving product certification, and passed the certification certificates of CE/UL/IRIS/CAS and other European and American countries. The company strictly improves the quality and efficient motor products and services for users in strict accordance with the requirements of relevant product standards.

The motor products manufactured and sold by our company are used in many industries, such as electric power, mining, steel metallurgy, petrochemical, water conservancy, transportation, building materials and many other industries. The equipment for the motor is pump, machine tool, fan, mill, crusher, rolling mill, compressor and many other industrial equipment.

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Application: Industrial
Operating Speed: Constant Speed
Number of Stator: Three-Phase
Species: Ye3
Rotor Structure: Squirrel-Cage
Casing Protection: Closed Type


induction motor

How do variable frequency drives (VFDs) impact the performance of AC motors?

Variable frequency drives (VFDs) have a significant impact on the performance of AC motors. A VFD, also known as a variable speed drive or adjustable frequency drive, is an electronic device that controls the speed and torque of an AC motor by varying the frequency and voltage of the power supplied to the motor. Let’s explore how VFDs impact AC motor performance:

  • Speed Control: One of the primary benefits of using VFDs is the ability to control the speed of AC motors. By adjusting the frequency and voltage supplied to the motor, VFDs enable precise speed control over a wide range. This speed control capability allows for more efficient operation of the motor, as it can be operated at the optimal speed for the specific application. It also enables variable speed operation, where the motor speed can be adjusted based on the load requirements, resulting in energy savings and enhanced process control.
  • Energy Efficiency: VFDs contribute to improved energy efficiency of AC motors. By controlling the motor speed based on the load demand, VFDs eliminate the energy wastage that occurs when motors run at full speed even when the load is light. The ability to match the motor speed to the required load reduces energy consumption and results in significant energy savings. In applications where the load varies widely, such as HVAC systems, pumps, and fans, VFDs can provide substantial energy efficiency improvements.
  • Soft Start and Stop: VFDs offer soft start and stop capabilities for AC motors. Instead of abruptly starting or stopping the motor, which can cause mechanical stress and electrical disturbances, VFDs gradually ramp up or down the motor speed. This soft start and stop feature reduces mechanical wear and tear, extends the motor’s lifespan, and minimizes voltage dips or spikes in the electrical system. It also eliminates the need for additional mechanical devices, such as motor starters or brakes, improving overall system reliability and performance.
  • Precision Control and Process Optimization: VFDs enable precise control over AC motor performance, allowing for optimized process control in various applications. The ability to adjust motor speed and torque with high accuracy enables fine-tuning of system parameters, such as flow rates, pressure, or temperature. This precision control enhances overall system performance, improves product quality, and can result in energy savings by eliminating inefficiencies or overcompensation.
  • Motor Protection and Diagnostic Capabilities: VFDs provide advanced motor protection features and diagnostic capabilities. They can monitor motor operating conditions, such as temperature, current, and voltage, and detect abnormalities or faults in real-time. VFDs can then respond by adjusting motor parameters, issuing alerts, or triggering shutdowns to protect the motor from damage. These protection and diagnostic features help prevent motor failures, reduce downtime, and enable predictive maintenance, resulting in improved motor reliability and performance.
  • Harmonics and Power Quality: VFDs can introduce harmonics into the electrical system due to the switching nature of their operation. Harmonics are undesirable voltage and current distortions that can impact power quality and cause issues in the electrical distribution network. However, modern VFDs often include built-in harmonic mitigation measures, such as line reactors or harmonic filters, to minimize harmonics and ensure compliance with power quality standards.

In summary, VFDs have a profound impact on the performance of AC motors. They enable speed control, enhance energy efficiency, provide soft start and stop capabilities, enable precision control and process optimization, offer motor protection and diagnostic features, and address power quality considerations. The use of VFDs in AC motor applications can lead to improved system performance, energy savings, increased reliability, and enhanced control over various industrial and commercial processes.

induction motor

What are the safety considerations when working with or around AC motors?

Working with or around AC motors requires careful attention to safety to prevent accidents, injuries, and electrical hazards. Here are some important safety considerations to keep in mind:

  • Electrical Hazards: AC motors operate on high voltage electrical systems, which pose a significant electrical hazard. It is essential to follow proper lockout/tagout procedures when working on motors to ensure that they are de-energized and cannot accidentally start up. Only qualified personnel should perform electrical work on motors, and they should use appropriate personal protective equipment (PPE), such as insulated gloves, safety glasses, and arc flash protection, to protect themselves from electrical shocks and arc flash incidents.
  • Mechanical Hazards: AC motors often drive mechanical equipment, such as pumps, fans, or conveyors, which can present mechanical hazards. When working on or near motors, it is crucial to be aware of rotating parts, belts, pulleys, or couplings that can cause entanglement or crushing injuries. Guards and safety barriers should be in place to prevent accidental contact with moving parts, and proper machine guarding principles should be followed. Lockout/tagout procedures should also be applied to the associated mechanical equipment to ensure it is safely de-energized during maintenance or repair.
  • Fire and Thermal Hazards: AC motors can generate heat during operation, and in some cases, excessive heat can pose a fire hazard. It is important to ensure that motors are adequately ventilated to dissipate heat and prevent overheating. Motor enclosures and cooling systems should be inspected regularly to ensure proper functioning. Additionally, combustible materials should be kept away from motors to reduce the risk of fire. If a motor shows signs of overheating or emits a burning smell, it should be immediately shut down and inspected by a qualified professional.
  • Proper Installation and Grounding: AC motors should be installed and grounded correctly to ensure electrical safety. Motors should be installed according to manufacturer guidelines, including proper alignment, mounting, and connection of electrical cables. Adequate grounding is essential to prevent electrical shocks and ensure the safe dissipation of fault currents. Grounding conductors, such as grounding rods or grounding straps, should be properly installed and regularly inspected to maintain their integrity.
  • Safe Handling and Lifting: AC motors can be heavy and require proper handling and lifting techniques to prevent musculoskeletal injuries. When moving or lifting motors, equipment such as cranes, hoists, or forklifts should be used, and personnel should be trained in safe lifting practices. It is important to avoid overexertion and use proper lifting tools, such as slings or lifting straps, to distribute the weight evenly and prevent strain or injury.
  • Training and Awareness: Proper training and awareness are critical for working safely with or around AC motors. Workers should receive training on electrical safety, lockout/tagout procedures, personal protective equipment usage, and safe work practices. They should be familiar with the specific hazards associated with AC motors and understand the appropriate safety precautions to take. Regular safety meetings and reminders can help reinforce safe practices and keep safety at the forefront of everyone’s minds.

It is important to note that the safety considerations mentioned above are general guidelines. Specific safety requirements may vary depending on the motor size, voltage, and the specific workplace regulations and standards in place. It is crucial to consult relevant safety codes, regulations, and industry best practices to ensure compliance and maintain a safe working environment when working with or around AC motors.

induction motor

What are the main components of an AC motor, and how do they contribute to its operation?

An AC motor consists of several key components that work together to facilitate its operation. These components include:

  1. Stator: The stator is the stationary part of an AC motor. It is typically made of a laminated core that provides a path for the magnetic flux. The stator contains stator windings, which are coils of wire wound around the stator core. The stator windings are connected to an AC power source and produce a rotating magnetic field when energized. The rotating magnetic field is a crucial element in generating the torque required for the motor’s operation.
  2. Rotor: The rotor is the rotating part of an AC motor. It is located inside the stator and is connected to a shaft. The rotor can have different designs depending on the type of AC motor. In an induction motor, the rotor does not have electrical connections. Instead, it contains conductive bars or coils that are short-circuited. The rotating magnetic field of the stator induces currents in the short-circuited rotor conductors, creating a magnetic field that interacts with the stator field and generates torque, causing the rotor to rotate. In a synchronous motor, the rotor contains electromagnets that are magnetized by direct current, allowing the rotor to lock onto the rotating magnetic field of the stator and rotate at the same speed.
  3. Bearing: Bearings are used to support and facilitate the smooth rotation of the rotor shaft. They reduce friction and allow the rotor to rotate freely within the motor. Bearings are typically located at both ends of the motor shaft and are designed to withstand the axial and radial forces generated during operation.
  4. End Bells: The end bells, also known as end covers or end brackets, enclose the motor’s stator and rotor assembly. They provide mechanical support and protection for the internal components of the motor. End bells are typically made of metal and are designed to provide a housing for the bearings and secure the motor to its mounting structure.
  5. Fan or Cooling System: AC motors often generate heat during operation. To prevent overheating and ensure proper functioning, AC motors are equipped with fans or cooling systems. These help dissipate heat by circulating air or directing airflow over the motor’s components, including the stator and rotor windings. Effective cooling is crucial for maintaining the motor’s efficiency and extending its lifespan.
  6. Terminal Box or Connection Box: The terminal box is a housing located on the outside of the motor that provides access to the motor’s electrical connections. It contains terminals or connection points where external wires can be connected to supply power to the motor. The terminal box ensures a safe and secure connection of the motor to the electrical system.
  7. Additional Components: Depending on the specific design and application, AC motors may include additional components such as capacitors, centrifugal switches, brushes (in certain types of AC motors), and other control devices. These components are used for various purposes, such as improving motor performance, providing starting assistance, or enabling specific control features.

Each of these components plays a crucial role in the operation of an AC motor. The stator and rotor are the primary components responsible for generating the rotating magnetic field and converting electrical energy into mechanical motion. The bearings ensure smooth rotation of the rotor shaft, while the end bells provide structural support and protection. The fan or cooling system helps maintain optimal operating temperatures, and the terminal box allows for proper electrical connections. Additional components are incorporated as necessary to enhance motor performance and enable specific functionalities.

China OEM Ie2 Ie3 High Efficiency 3 Phase Induction AC Electric Motor Ye3-112m-4-4kw   with Hot selling	China OEM Ie2 Ie3 High Efficiency 3 Phase Induction AC Electric Motor Ye3-112m-4-4kw   with Hot selling
editor by CX 2024-05-15

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