Self-Cooled Motors

In industrial applications, the motor thermal performance directly influences its operational stability and the service life. The self‑cooled motors break the limitations of the traditional cooling methods with the innovative built‑in ther-mal structure, striking the effective balance between the efficient heat dissi-pation and the compact design. Particularly suitable for installations where the space is limited, the environmental conditions are harsh, or the convenient of maintenance is essential, these motors deliver the simpler and more reliable power solution

The self-cooled motors feature at innovated integrated thermal management system that efficiently dissipates the heat without external fans. This results in the compact design and the enhanced protection rating, making them particularly advantageous in demanding industrial settings such as the confined spaces and dusty conditions or high-temperature environments. Engineered for the reliable, maintenance-free operation, they are ideally suited for the equipment with stringent sealing requirements, including material handling systems, mining machinery, and the food processing applications.

Key Features

Featuring an integrated thermal design, our self‑cooled motors deliver high‑efficiency heat dissipation without external fans, ensuring low temperature rise even under continuous full‑load operation. Their compact construction saves valuable installation space, while the fully enclosed construction effectively protects against dust and moisture ingress. Routine maintenance is minimal, eliminating the need for fan cleaning or replacement and substantially reducing overall lifecycle maintenance costs. With a high ingress‑protection rating, these motors provide dependable, stable performance in demanding industrial environments.

Free Up Valuable Space

By eliminating the external fan, the motor achieves a more compact footprint. It can be installed directly within space‑constrained equipment, offering greater flexibility in overall machine design.

Reduce Core Failure Risks

Removing the fan—a common point of failure due to damage or dust accumulation—enhances operational reliability from the design stage, ensuring greater continuity in your production processes.

Lower Long‑Term Maintenance Costs

The fully enclosed, fan‑less design avoids the routine cleaning and replacement of cooling fans. This significantly cuts labor, spare‑parts expenses, and production losses associated with maintenance downtime.

Withstand Demanding Environments

High‑grade sealing and protection effectively block dust, moisture, and corrosive particles, making these motors particularly suitable for use in harsh industries such as mining, ceramics, and food processing.

Technical Specifications

Power Range: The series offers a broad selection, from small to medium power models starting at 0.55 kW up to high-power 315 kW units, meeting diverse equipment drive requirements.

Rated Voltage: Supports common industrial voltages including 380V, 415V, and 660V, ensuring excellent compatibility with mainstream power grids and variable frequency drives for easy application.

Efficiency Class: The full range meets the IE3 (High Efficiency) standard, with select models achieving IE4 (Super Premium Efficiency) levels, delivering significant energy savings over long-term operation.

Power Factor: Through optimized electromagnetic design, the motors achieve a high power factor at rated load, helping to reduce line reactive power losses and improve overall power supply quality.

Protection Class: Standard rating is IP65, providing complete protection against dust ingress and low-pressure water jets, meeting the requirements of most complex industrial environments.

Frame Material: High-strength cast iron housing provides robust construction and effective heat dissipation. Scientifically designed cooling fins maximize the surface area for natural convection cooling.

Cooling Method: Features a totally enclosed, fan-cooled (TEFC) design (IC416). Cooling is achieved through internal air circulation driven by the rotor and efficient heat transfer via the finned housing surface.

Insulation Class: The stator winding utilizes a Class F insulation system, processed with Vacuum Pressure Impregnation (VPI). This ensures outstanding insulation stability, moisture resistance, and thermal conductivity.

Mounting Type: Offers multiple standard mounting configurations including B3 (foot-mounted), B5 (flange-mounted), and B35 (foot and flange-mounted) for flexible integration into various types of equipment.

Bearing Type: Equipped with long-life, sealed deep groove ball bearings or cylindrical roller bearings. Pre-lubricated with high-quality grease, they are typically maintenance-free for the motor’s entire service life.

Starting Torque: Delivers reliable starting performance, with starting torque typically 150% or higher than the rated value, ensuring smooth equipment startup under load.

Maximum Torque: Offers strong overload capability with a high maximum torque ratio, commonly exceeding 200% of the rated torque, allowing it to handle short-duration shock loads during operation.

Noise Level: Operates without an external fan, with electromagnetic noise being the primary source. Overall running noise is low, with most models maintaining full-load noise levels below 70 dB(A).

Vibration Level: Rotor components undergo precision dynamic balancing, resulting in minimal overall vibration. Vibration levels meet the “Good” grade per ISO standards, ensuring smooth and stable operation.

Duty Cycle: Designed for S1 continuous duty. Its optimized thermal performance allows it to adapt to prolonged continuous operation or periodic load variations (such as S3 duty cycle).

Operating Temperature: Designed for ambient temperatures from -15°C to +40°C. Within this range, the motor is guaranteed to deliver continuous rated power without exceeding temperature rise limits.

Altitude: Suitable for operation at altitudes up to 1000 meters. When used at higher altitudes, appropriate power derating must be considered due to reduced cooling efficiency in thinner air.

Safety Certifications: Products hold mandatory national CCC certification. International certifications such as CE and ATEX (explosion-proof) are available upon request to meet specific market requirements.

Warranty Period: We provide a reliable 18-month product warranty from the date of manufacture, covering any defects resulting from materials or workmanship.

Compliance Standards: Products are designed, manufactured, and tested in strict accordance with the GB/T 755 rotating electrical machines standard and the IEC 60034 series of international standards, ensuring verified performance and safety.

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Motor Selection Guide and FAQ

Motor Selection Guide
1. Define Basic Parameters
Power & Speed:
Determine the required rated power based on load characteristics and define the motor pole count and speed range according to your equipment’s operational speed.
Voltage & Frequency:
Confirm your power supply standard (e.g., 380V/50Hz, 480V/60Hz). Custom designs are available for special voltage requirements.
Mounting Type:
Specify IEC standard mounting (e.g., B3, B5, B14). Custom the flanges & bases are also supported.
2. Consider Operating Environment
Protection Rating (IP):
IP55 for standard environments. IP65 is recommended for damp or dusty conditions. Hazardous areas require Ex D/Ex E certifications.
Insulation Class:
Class F (155°C) for general use. Class H (180°C) insulation is advised for high-temperature environments.
Cooling Method:
Self-ventilated (IC411) for standard applications. Forced air or water cooling is available for enclosed spaces or high-power-density scenarios.
3. Match Load Characteristics
Starting Torque:
Consider starting torque for fan/pump loads. Verify locked-rotor torque for conveying equipment.
Duty Cycle:
Standard motors are suitable for continuous operation (S1). Frequent start-stop cycles (S5) require reinforced bearings and insulation.
Efficiency Requirement:
Select IE3/IE4/IE5 efficiency classes based on annual operating hours. Ultra-premium efficiency (IE5) motors offer the lowest total cost of ownership for long-running applications.
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Contact Us for the Precise Solution
Provide your equipment parameters, load profile, environmental conditions, and application details.
Receive the complimentary motor selection calculation, the energy efficiency analysis report, and the 3D model.
We support sample testing and operational simulation for validation.