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YBK3 Series Explosion-Proof Three-Phase Asynchronous Motor for Underground Coal Mines

YBK3 Series Explosion-Proof Three-Phase Asynchronous Motor for Underground Coal Mines

The YBK3 Series Explosion-Proof Three-Phase Asynchronous Motor for underground coal mines is specifically designed for hazardous environments with gas and coal dust, meeting the strict requirements of safety, reliability, and durability for underground mining power equipment. The motor features a high-strength explosion-proof enclosure and sealed structure, ensuring long-term stable operation in flammable and explosive underground conditions.

The motor offers excellent starting performance and overload resistance, suitable for heavy-duty and frequent start-stop conditions. It is ideal for conveyors, hoists, pumps, and ventilation equipment as key underground mining power devices. Enhanced insulation systems and wear-resistant bearings ensure safe and reliable long-duration operation.

  • Coal mine-specific explosion-proof design, high safety

  • High starting torque with strong overload resistance

  • Supports multiple explosion-proof grades, installation types, and customizable voltage parameters

  • Stable operation, easy maintenance, long service life

  • Adapted for humid and dusty underground environments

Applications: underground coal mine hoisting, conveying, drainage, ventilation, and mining power equipment.

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The YBK3 series explosion-proof three-phase asynchronous motor is specifically designed for underground coal mine applications. Featuring a flameproof structure, robust insulation, and reliable performance, it ensures safe and efficient operation in harsh and hazardous mining environments.

YBK3 Series Explosion-Proof Three-Phase Asynchronous Motor for Underground Coal Mines: A Safe, High-Efficiency Power Solution

In the coal mining industry, the YBK3 series explosion-proof three-phase asynchronous motor has become an indispensable power solution for underground operations, thanks to its outstanding explosion-proof safety and high energy efficiency. It is specifically engineered to ensure reliable, stable, and efficient performance in harsh and hazardous mining environments.

The YBK3 series underground coal mine explosion-proof motor is a high-efficiency, energy-saving power unit designed exclusively for underground coal mine conditions. Utilizing advanced flameproof (Ex d) technology and optimized electromagnetic design, this series delivers excellent explosion-proof safety, high efficiency, reliable operation, and long service life. The motors strictly comply with GB 3836.1-2010 and GB 3836.2-2010 national standards, making them an ideal driving solution for coal mine working faces and fixed underground equipment.


1. Product Overview and Key Features

1.1 Product Positioning and Application Scope

The YBK3 series explosion-proof motor is purpose-built for harsh underground coal mine environments. With an explosion protection marking of Exd I Mb, it is suitable for mining areas containing methane gas or coal dust, as well as other hazardous locations with explosive gas mixtures.

Developed on the basis of the YBK2 series and integrated with advanced domestic electromagnetic technology, the YBK3 series offers high efficiency, energy savings, long service life, low noise, and an advanced explosion-proof structure. The welded steel frame, reinforced fan cover, terminal box, and insulation system enable the motor to operate reliably under severe underground conditions.

1.2 Core Technical Advantages

  • Advanced explosion-proof design: The flameproof enclosure remains intact during internal explosions, preventing flame transmission through flameproof joints and eliminating the risk of external ignition.
  • High energy efficiency: Motor efficiency meets GB 18613-2012 Grade 2 energy efficiency requirements, equivalent to IEC 60034-30 IE3 efficiency level, delivering significant energy savings.
  • Robust mechanical structure: Protection class IP55, insulation class F, large thermal margin, and extended service life ensure stable long-term operation.

2. Technical Parameters and Performance

Main Technical Specifications

  • Frame size: H80–H355
  • Rated voltage: 380V, 660V, 1140V, 380/660V, 660/1140V
  • Rated frequency: 50Hz
  • Protection class: IP55
  • Insulation class: F
  • Cooling method: IC411 (Totally Enclosed Fan Cooled)
  • Duty type: S1 (Continuous duty)
  • Explosion-proof marking: Exd I Mb
  • Mounting types: IMB3, IMB5, IMB35

Performance Characteristics

  • High efficiency and energy saving, reducing operating costs
  • Low noise and low vibration, achieved through optimized rotor and bearing systems
  • Wide voltage adaptability, ensuring stable operation under varying underground power conditions

3. Structural Design and Configuration

3.1 Main Motor Structure

  • Flameproof enclosure: Key components such as frame, end shields, bearing covers, and terminal box undergo a 1.5 MPa static pressure test for at least 10 seconds, ensuring no deformation or leakage that could compromise explosion protection.
  • Optimized cooling system: Fully enclosed fan-cooled structure with parallel and vertical cooling fins; anti-static plastic fan with low inertia and low loss; steel fan cover providing maximum airflow and excellent heat dissipation.
  • Explosion-proof terminal box: Top-mounted terminal box with spacious wiring cavity, supporting rubber-sheathed cables, armored cables, steel conduits, or flexible conduits; equipped with six terminals for easy connection.

3.2 Internal Core Components

  • Stator: High-strength polyester enameled copper wire with VPI vacuum pressure impregnation, offering excellent electrical, mechanical, moisture-resistant, and thermal stability.
  • Rotor: Cast aluminum rotor, dynamically balanced for smooth operation, low vibration, and high efficiency; high-quality silicon steel laminations reduce losses.
  • Bearing system: Special low-noise, low-vibration bearings; sealed bearings for smaller frames and oil injection/drain devices for larger frames, allowing lubrication without shutdown.

4. Application Areas

The YBK3 series explosion-proof high-efficiency motor is widely used in coal mining operations, including:

  • Mining and cutting equipment at underground working faces
  • Fixed underground equipment, such as pumps and ventilation systems
  • Conveying and hoisting machinery, including conveyors and elevators

Applicable Environmental Conditions

  • Ambient temperature: -15°C to +35°C (underground coal mines)
  • Altitude: ≤1000 m
  • Relative humidity: ≤95% at 25°C
  • Power supply fluctuation: Voltage ±5% (short-term ±10%), frequency ±2% (short-term ±5%)

5. Product Value and Advantages

5.1 Safety and Reliability

  • Fully compliant with national explosion-proof standards
  • High-strength fasteners with spring washers prevent loosening
  • Optional protection devices: stator temperature monitoring, bearing temperature monitoring, anti-condensation heaters

5.2 Energy Efficiency and Economic Benefits

  • Power range from 0.75 kW to 315 kW, suitable for various applications
  • High efficiency and power factor reduce energy consumption and operating costs
  • Low total lifecycle cost due to reduced maintenance and energy savings

5.3 Easy Maintenance

  • User-friendly structure for inspection and servicing
  • Modular design simplifies maintenance and spare parts management
  • Long service life with F-class insulation and generous thermal margin

6. Installation and Operation Guidelines

  • Suitable for underground coal mine environments with gas or coal dust
  • Solid and level foundation required
  • Supports flexible couplings, gear drives, and belt drives
  • Multiple starting methods available: DOL, Y/Δ, reduced voltage, VFD

7. Service and Technical Support

  • Manufactured in strict compliance with GB 755-2008, GB 3836 series, and relevant IEC standards
  • Comprehensive quality inspection and testing during production
  • Professional support for selection, installation, commissioning, and after-sales service

The YBK3 series explosion-proof three-phase asynchronous motor for underground coal mines stands out for its superior safety, high efficiency, and reliable performance. It is an ideal power solution for hazardous mining environments, helping enterprises improve safety, reduce energy consumption, and enhance productivity.

Choosing the YBK3 series means choosing reliable explosion-proof safety, energy efficiency, and professional technical support for modern coal mining operations.

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Simo Motor After-Sales Service Policy: Quality First, Customer Foremost

Sincere, Attentive, Dedicated — Simo Always Cares


Preface

Thank you for choosing Simo Motor products. As a company with many years of experience in motor manufacturing, Simo Motor always adheres to the principle of "Quality First, Customer Foremost." Through a comprehensive service system, we ensure that every customer enjoys efficient and professional after-sales support.

Our products have repeatedly been awarded provincial, municipal, and national honors such as “High-Quality Product,” “China Famous Brand Product,” “National Exemption from Inspection Product,” and “China Well-Known Trademark.” To further enhance customer experience, we have formulated this after-sales service policy, aimed at providing comprehensive, prompt, and satisfactory service guarantees.


1. Quality Assurance Commitment

Simo Motor strictly implements full quality control in accordance with international standards, national standards, industry standards, and corporate standards:

  • All products are manufactured under the effective operation of the GB/T 19001-2008/ISO 9001:2008 Quality Management System, ensuring rigorous inspection from raw material intake to final product delivery.

  • We guarantee that all products provided are brand new, unused, and meet the quality requirements stipulated in customer contracts.

  • We maintain a quality management system compliant with GB/T 19001-2000 idt ISO 9001:2000, ensuring its effective operation.


2. Pre-Sales Service

To help customers make the best choice, Simo Motor provides comprehensive pre-sales support:

  • Professional Technical Consultation: Responding to customer inquiries about motor products and technical issues.

  • Personalized Solutions: Objectively introducing Simo Motor product features and performance, and providing customized power solutions.

  • Comprehensive Product Information: Providing detailed quotations, drawings, and motor samples to help customers fully understand the product.


3. Ordering Instructions

To ensure the motor meets your usage requirements, please specify the following parameters when placing an order:

  • Basic Parameters: Motor model, rated power, rated voltage, number of poles, rated frequency.

  • Installation Environment: Protection level, cooling method, installation type, rotation direction, environmental conditions, cable exit position.

  • Usage Conditions: Installation altitude, working environment temperature, motor load type.

For special requirements, a separate technical agreement must be signed before placing an order. You may also call our customer service hotline 159-0292-3228 for professional guidance.


4. Warranty Policy Details

1. Warranty Period

Simo Motor provides a warranty of up to two years from the shipping date. Within this period, if the motor is damaged or cannot operate properly due to manufacturing defects, Simo Motor will repair or replace parts or the motor free of charge.

2. Warranty Coverage

  • The warranty covers product quality issues caused by our company, with free replacement of parts or free repair.

  • Warranty services require correct use and regular maintenance, following the original operation manual and recommended lubrication, cleaning, and care instructions.

3. Exclusions from Warranty

The following are not covered by the warranty:

  • Damage caused by non-designated personnel

  • Unauthorized modifications or self-repair

  • Use of non-official parts or software

  • Failure to follow operation manual instructions for use, handling, and maintenance

  • Damage caused by natural disasters (wind, fire, flood, earthquake, etc.)

  • Normal wear and tear under standard use


5. Post-Warranty Service

After the warranty expires, Simo Motor continues to provide service support:

  • Lifetime Paid Service: After the warranty period, if the product fails, we offer lifetime paid service, supplying consumable parts and components at cost price.

  • Regular Follow-Up: Our after-sales staff will periodically contact users to check product status and address potential issues.

  • Professional Repair Services: The company undertakes repair services for all types of motors, whether under warranty or not, providing professional maintenance and inspection.


6. Service Commitment and Standards

Simo Motor upholds the "Sincere, Attentive, Dedicated — Simo Always Cares" Three-Heart Service Philosophy, ensuring excellent customer experience through standardized service processes:

  • Professional Service Team: A dedicated team provides installation guidance, fault diagnosis, and repair services, ensuring efficient motor operation.

  • Rapid Response Mechanism: After receiving customer feedback, our after-sales team responds promptly and formulates quick solutions.

  • Full Tracking and Records: All service processes are documented to ensure traceability and continuous improvement of service quality.


7. Customer Complaint Channels

If you are not satisfied with Simo Motor’s services, please provide feedback through the following channels:

  • Direct complaints to the service department or headquarters

  • Call our customer service hotline: 159-0292-3228

We take every feedback seriously and continuously strive to improve our service quality.


Conclusion

Simo Motor will continue to provide high-quality products and professional after-sales service. Through a complete service system, we solve your concerns and ensure peace of mind. We firmly believe that only with customer success can Simo Motor grow. Choosing Simo Motor means choosing quality and trust.

Simo Motor — Dedicated Service, Creating the Future Together!

Simo Motor Brand Advantages: Outstanding Quality, Leading Innovation and Development in the Motor Industry

Over 60 Years of Professional Experience, Setting the Benchmark in the Motor Industry


Brand Heritage and Strength

Simo Motor (formerly Xi’an Motor Factory) was established in 1955. As one of the leading enterprises in China’s motor industry, it has over six decades of manufacturing experience and technical expertise. Today, the company has grown into a large-scale modern enterprise integrating motor product R&D, manufacturing, and sales. Its products are widely used in key sectors such as power, coal, petroleum, mining, metallurgy, railways, transportation, chemical, agriculture, water conservancy, and aviation.

With profound technical expertise and continuous innovation, Simo Motor has built a prestigious brand image in the motor industry. Its products are exported to more than 40 countries and regions, including North America, Europe, the Middle East, Southeast Asia, Africa, and Australia, earning trust and praise from global customers.


Core Technology Advantages

1. Leading R&D and Innovation Capability

Simo Motor treats technological innovation as the core driving force of enterprise development:

  • Professional R&D Team: Composed of senior engineers and technical experts focusing on cutting-edge motor technology research and applications.

  • Continuous Investment in Technology: 5%-7% of annual sales revenue is invested in R&D to ensure continuous innovation and product upgrades.

  • Patented Technology Achievements: Over 100 national patents, with multiple products receiving national and provincial science and technology progress awards.

  • Industry-Academia Collaboration: Strategic partnerships with renowned universities and research institutes to advance motor technology development.

2. Excellent Product Quality System

Simo Motor has established a robust quality assurance system to ensure each motor meets the highest standards:

  • International Certifications: ISO9001 Quality Management, ISO14001 Environmental Management, and OHSAS18001 Occupational Health and Safety certifications.

  • Strict Quality Control: 68 rigorous inspection processes from raw material procurement to final product delivery to ensure zero defects.

  • Advanced Testing Equipment: Equipped with international motor performance testing systems, vibration analyzers, noise measurement devices, and more.

  • Continuous Quality Improvement: Comprehensive feedback mechanisms for continuous optimization of production processes and product stability.


Product Advantages and Features

1. High-Efficiency Energy-Saving Technology

Simo Motor actively responds to national energy-saving policies with a series of high-efficiency products:

  • High-Efficiency Motor Series: Meets the national GB18613-2020 energy efficiency standards, with some products reaching IE4/IE5 ultra-high efficiency levels.

  • Energy-Saving Technology: Uses premium silicon steel, low-loss bearings, and efficient cooling systems to reduce operating energy consumption.

  • Intelligent Control Technology: Advanced variable frequency control systems optimize motor operation, improving energy savings by 15%-30%.

2. Outstanding Performance

Simo Motor products are known for high reliability, long service life, and low maintenance costs:

  • Powerful Output: Optimized electromagnetic design ensures high starting torque and strong overload capability.

  • Low Vibration and Noise: Dynamic balancing and noise reduction technologies ensure vibration and noise levels below national standards.

  • Strong Environmental Adaptability: Designed for harsh conditions with heat resistance, moisture-proof, and corrosion-resistant features.

  • Long Lifespan Design: Key components use specialized treatment and premium materials, with a design life exceeding 100,000 hours.

3. Comprehensive Product Series

Simo Motor provides a wide range of products to meet diverse customer needs:

  • High-Voltage Motors: Voltage levels of 6kV, 10kV, and power range 200–10,000 kW.

  • Low-Voltage Motors: Series such as YX3, YE3, YE4, with power range 0.55–1,000 kW.

  • Explosion-Proof Motors: Certified for use in flammable and explosive environments.

  • Special Motors: Customized for industries such as mining, metallurgy, and marine applications.

  • Non-Standard Customization: Strong ability to provide tailored solutions according to customer requirements.


Service System Advantages

Simo Motor has established a comprehensive customer service system:

  • Pre-Sales Technical Support: Professional selection guidance, solution design, and product demonstration.

  • In-Sales Support: Strict contract compliance, on-time delivery, and installation guidance.

  • After-Sales Guarantee: 24-month warranty, 24/7 technical support, 48-hour on-site service commitment.

  • Lifetime Maintenance Support: Customer equipment files maintained for full lifecycle service.


Industry Application Advantages

Simo Motor has extensive experience across key industries:

  • Power Industry: Provides reliable motors for thermal, hydro, and nuclear power.

  • Coal Industry: Explosion-proof motors certified for coal mine safety.

  • Petrochemical Industry: Corrosion-resistant and explosion-proof motors for harsh environments.

  • Metallurgy: High-overload, high-temperature resistant motors meet specialized equipment needs.

  • Transportation: Customized motors for railways, urban transit, and ports.


Brand Honors and Certifications

Simo Motor’s excellent product quality and market performance have earned multiple honors:

  • China Famous Brand Product, National Exemption from Inspection Product, China Well-Known Trademark

  • High-Tech Enterprise, Provincial Enterprise Technology Center

  • Multiple provincial and ministerial-level science and technology awards

  • Credit-worthy and trustworthy enterprise, AAA-level quality reputation


Conclusion

Choosing Simo Motor means choosing reliable quality, leading technology, and comprehensive service support. Over 60 years of professional accumulation have given Simo Motor deep technical expertise and rich industry experience, providing customers with the best motor products and complete power solutions.

In the future, Simo Motor will continue to adhere to the philosophy of “Quality First, Innovation Driven, Customer Foremost”, constantly improving product technology and quality, creating greater value for customers, and contributing to the development of China’s motor industry.

Simo Motor — Powerful, Efficient, and Fully Supported!

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