1 Overview of the YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors

The YE5-80~355 (IP54~IP55) series of small-size, low-voltage, three-phase induction motors is our company’s latest-generation product, developed through further rigorous energy-saving optimization based on the high-efficiency YE4 motor. This new generation of energy-saving three-phase induction motors features innovative design, attractive appearance, low noise, high torque, excellent starting performance, compact structure, and convenient operation and maintenance. Their efficiency meets Grade 1 energy-efficiency requirements specified in GB18613-2020 “Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Small and Medium Three-Phase Induction Motors”. Certification as an energy-saving product by the China Quality Certification Center (CQC) is expected shortly; currently, the product is in the preliminary promotional phase.

　　YE5Motor power ratings, electrical performance characteristics, mounting dimensions, and tolerances all comply with national standard GB755 “Rotating Electrical Machines”, IEC Standard IEC34-1 “Rotating Electrical Machines—Part 1: Rating and Performance”, and mechanical industry standard GB/T4772.1, among others.

　　YE5The motor enclosure protection rating conforms to GB4942.1 and IEC34-5 “Degrees of Protection Provided by the Integral Design of Rotating Electrical Machines (IP Code)”. The cooling method for this series complies with GB/T1993 and IEC34-6 “Methods of Cooling for Rotating Electrical Machines” and is designated IC411.

Structural and mounting configurations for this series include IMB3 (horizontal, with feet, end shields without flanges), IMB5 (horizontal, without feet, end shields with flanges), IMB35 (horizontal, with feet, end shields with flanges), and IMV1 (vertical, without feet, end shields with flanges), all conforming to GB/T997 and IEC34-7 “Designations for Types of Construction and Mounting of Electrical Machines”.

This series employs Class F insulation, while temperature rise across the entire series is evaluated per Class B limits—significantly enhancing operational safety and reliability.

2 Application Scope of the YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors

These motors are suitable for driving various general-purpose machinery—including compressors, blowers, pumps, machine tools, conveyors, and other mechanical equipment—and serve as prime movers in diverse industrial settings such as mines, machinery plants, petrochemical facilities, and power generation plants. For applications involving large moment-of-inertia loads—e.g., fans, coal pulverizers, rolling mills, hoists, crushers, and belt conveyors—customers must supply relevant technical documentation and sign a technical agreement upon ordering, serving as the basis for special motor design to ensure reliable motor operation.

Basic operating conditions for normal motor operation:

a. Altitude not exceeding 1000 m;

b. Ambient air temperature not exceeding 40 °C; minimum ambient air temperature: –15 °C;

c. Maximum monthly average relative humidity: 90 %, provided that the corresponding monthly average minimum temperature does not exceed 25 °C;

d. Supply frequency: 50 Hz ±1 %;

e. Operating voltage variation range: within ±5 % of rated voltage;

f. Duty type: Continuous duty (S1);

3 Model Number Explanation for the YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors

Per GB4831, motor model numbers consist of two sequentially arranged parts: product code and specification code. The product code comprises standardized symbols, defined as follows:

YE5 — Squirrel-cage rotor, three-phase induction motor; IE5 efficiency class; Grade 1 energy-efficiency level per China’s 2020 national standard

The product specification code consists of frame center height, core length sequence number, and number of poles.

Example:

4 Structural Description of the YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors

　　The YE4 series high-efficiency energy-saving motors are designed with primary consideration given to using high-quality cold-rolled silicon steel sheets, experimenting with various fan structural configurations and unequal-turn winding configurations, and—especially for low-power motors—adopting a cast-copper rotor manufacturing process to reduce motor losses. In terms of manufacturing processes, emphasis is placed on improving machining accuracy and minimizing burrs on stator and rotor laminations, thereby further reducing no-load losses. Prototype test results confirm that key performance indicators—including efficiency, power factor, starting current, starting torque, maximum torque, and temperature rise—all meet design requirements, successfully achieving the development objective of IE5-efficiency-class three-phase induction motors.

      The motor frame and end shields are both made of high-strength cast iron; the stator adopts an external press-fitting structure. The stator windings use round copper wire with random-wound soft windings and F-class insulation materials. Special binding techniques secure the winding overhangs, ensuring robust and reliable fixation. The entire stator undergoes vacuum pressure impregnation (VPI) with solvent-based varnish (VP1), endowing the motor with excellent, reliable insulation performance as well as moisture resistance and impact resistance.

The squirrel-cage rotors in this motor series employ either die-cast aluminum or die-cast copper construction, ensuring dependable operation. The motors use rolling bearings, with the standard protection rating being IP55. When the motor itself features a higher protection rating, the bearing protection rating is correspondingly upgraded.

Motors with frame sizes H180–H355 are equipped with non-stop lubrication and oil-drainage devices, enabling lubrication and oil drainage without shutdown using dedicated tools.

The main terminal box adopts a sealed structure, with its protection rating matching that of the motor. The main terminal box is typically mounted on top of the motor frame but can alternatively be installed on the side of the frame per user requirement. A dedicated grounding terminal is provided inside the terminal box.

5 YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors — Squirrel-Cage Type Induction Motors (YE5 Series Energy-Saving Three-Phase Induction Motors)

Advanced computational techniques are applied to calculate the starting temperature rise and mechanical stress of the squirrel-cage rotor in these squirrel-cage induction motors, preventing premature motor failure caused by excessive starting load. Users are advised to verify the following: (1) The moment of inertia of the rotating components of the driven machinery—referred to the motor shaft speed—must not exceed the value specified under “[Load J]” in the technical data table; (2) The user’s power supply system must ensure that the motor terminal voltage during starting remains no lower than 85% of the rated voltage; (3) The load torque characteristic of the driven machinery must conform to pump or fan-type load torque characteristics.

Under the above conditions, the motor is permitted to start twice consecutively from a cold state, with natural stopping between starts; or to start once from a hot state. Any additional start beyond these limits must occur only after the motor has been stopped for at least one hour.

If the moment of inertia of the rotating components of the driven machinery exceeds the “[Load J]” value specified in the technical data table, or if frequent motor starts are required, or if the motor may need to start under heavy load, please contact our company in advance for consultation and special design to ensure reliable motor starting.

6 Ordering Information for YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors

Please specify the following information when placing an order:

(1) Motor model: (e.g., YE5-355M1-6)

(2) Rated frequency: (50 Hz)

(3) Rated power: (160 kW)

(4) Rated voltage: (380 V)

(5) Number of poles: (6-pole)

(6) Protection rating: (IP55)

(7) Cooling method: (IC411)

(8) Mounting type: (IMB3)

(9) Direction of rotation: (Clockwise, viewed from the drive-end shaft extension)

Terminal box position: (Top of the motor frame)

  Technical specifications:

SIMO YE5 Series Ultra-High-Efficiency Energy-Saving Motors (IE5) – 2-Pole and 4-Pole Technical Specifications Table

http://m.ximadianji.cn/product/simo-YE5.html

SIMO YE5 Series Ultra-High-Efficiency Energy-Saving Motors (IE5) – 6-Pole and 8-Pole Technical Specifications Table

http://m.ximadianji.cn/product/products-5-43.html

7. Precautions for SIMO YE5 Series Ultra-High-Efficiency Energy-Saving Three-Phase Induction Motors

　　1. Verify the rotational inertia of the driven mechanical equipment (referred to the motor shaft speed); refer to Section 5 (“Starting of Squirrel-Cage Motors”) above.

　　2. If operating conditions change or other special requirements exist, a separate technical agreement must be signed prior to concluding the purchase contract.

　　3. The technical performance data listed in the tables within this catalog are guaranteed values, provided for reference during design selection and ordering.

　　4. With technological advancements and revisions to domestic and international standards, technical data and dimensions shown in this catalog may be subject to change without prior notice; after placing an order, please contact our company to obtain the official outline drawing.