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YKK Series High Voltage Three-Phase Asynchronous Motor

YKK Series High-Voltage Three-Phase Asynchronous Motor

The YKK series high-voltage three-phase asynchronous motor from Simo is designed for large-scale industrial and heavy-duty equipment, widely used in metallurgy, power, mining, petrochemical, and heavy machinery industries. This motor series utilizes high-strength materials and advanced electromagnetic design to ensure high efficiency, high power output, and long-term stable operation.

The motor features a robust and durable structure, with optimized cooling and insulation systems, allowing it to operate reliably under high temperature, high humidity, and vibration-intensive conditions. Multiple power ratings and mounting configurations are available to meet diverse industrial high-voltage motor requirements.

  • High-voltage design, suitable for large-scale industrial equipment

  • Three-phase asynchronous motor, high efficiency and stable operation

  • Optimized cooling and insulation systems for enhanced reliability

  • Multiple power ratings and mounting configurations available

  • Suitable for metallurgy, power, mining, petrochemical, and heavy machinery

Application Scenarios: Large industrial machinery, mining hoists, metallurgical rolling mills, power transmission systems, and various high-voltage industrial applications.

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Excerpt:

The YKK series high voltage three-phase asynchronous motor is designed for industrial applications that require reliable, high-performance power solutions. Offering high efficiency, durability, and excellent starting torque, it is ideal for power generation, mining, and large-scale machinery.

Xi’an Taifu Simo YKK Series High Voltage Three-Phase Asynchronous Motor – Comprehensive Overview

Professional drive for industrial equipment, delivering reliable power solutions

The Xi’an Taifu Simo YKK Series (H355–1000) High Voltage Three-Phase Asynchronous Motor is a high-performance power product independently developed and manufactured by Xi’an Simo Motor (Group) Co., Ltd.
This series adopts a totally enclosed squirrel-cage rotor structure, featuring compact construction, stable performance, and wide applicability across multiple industrial sectors.

This document provides a detailed introduction to the model designation, product features, technical characteristics, performance parameters, and ordering instructions, helping users fully understand this premium high-voltage motor solution.

Model Designation – Understanding the Motor Code

The YKK series high-voltage motor model follows standardized coding rules.
Example: YKK3551-4

  • YKK: Totally enclosed squirrel-cage induction motor with air-to-air cooler
  • 3551: Frame center height 355 mm, No.1 core length
  • 4: Number of poles

According to national motor designation standards, motor models consist of product code, specification code, special environment code, and supplementary code.
As a mainstream high-voltage motor series, the YKK range inherits proven design concepts while integrating multiple technical upgrades.


Product Overview – Professional Design with Multiple Advantages

Technical Standards and Structural Features

The YKK Series (H355–1000) 6 kV / 10 kV high-voltage three-phase asynchronous motors are totally enclosed squirrel-cage motors equipped with air-to-air coolers.
Protection class: IP44 or IP54
Cooling method: IC611 (in accordance with GB/T 1993)

Key advantages include:

  • High efficiency and energy saving: Optimized electromagnetic design and airflow system reduce losses and improve operating efficiency
  • Low noise and low vibration: Precision machining and dynamic balancing ensure smooth and quiet operation
  • Compact structure: Reduced size and weight, saving installation space
  • Easy maintenance: Rational design simplifies installation, inspection, and servicing

Wide Application Range

YKK series motors are ideal drive sources for various industrial equipment, including:

  • Fans, compressors, and pumps
  • Crushers and metal cutting machine tools
  • Fixed equipment in coal mines, power plants, and industrial enterprises

With strong environmental adaptability, these motors operate reliably under complex and demanding working conditions.


Technical Features – Advanced Design and Reliable Performance

Box-Type Structural Design

The YKK series adopts a fully welded steel plate box-type frame and end covers with a detachable internal structure.
Protective covers and inspection panels are installed on the sides and top of the motor, allowing easy access to internal components for maintenance and repair.
This structure provides light weight, high rigidity, and excellent practicality.

High-Quality Insulation System

  • Stator with slide-in external press-fit structure
  • Stator windings use F-class low-resin insulation materials
  • End windings are securely fixed and tied
  • Treated with vacuum pressure impregnation (VPI) solvent-free varnish

This ensures excellent insulation performance, strong mechanical strength, and superior moisture resistance.
Motors rated above 6000 V are equipped with anti-corona protection measures.

Flexible Bearing Configuration

Bearings are available in rolling bearing or sleeve bearing designs, depending on motor power and speed.
Standard bearing protection class matches the motor enclosure (IP44 or IP54), with higher protection levels available when required.

Efficient Cooling System

A top-mounted enclosed air-to-air cooler provides excellent heat dissipation.
Cooling method IC611 ensures stable motor operation even in high-temperature environments.


Technical Parameters and Performance Characteristics

  • Wide power range: 220 kW to 14,000 kW
  • Rated voltage options: 6 kV, 10 kV (other voltages available on request)
  • Power supply conditions:
    • Rated frequency: 50 Hz
    • Voltage tolerance: ±5%
    • Frequency tolerance: ±1%
  • Insulation class: F or H
  • Mounting arrangements: IMB3, IMB35, and others

Xi’an Simo Motor Quality Assurance System

Xi’an Simo Motor (Group) Co., Ltd. is a professional manufacturer of medium and large AC/DC motors, integrating motor design, manufacturing, electrical control, machining, casting, logistics, automation, and turnkey power system solutions.

The company is certified to:

  • ISO 9001 Quality Management System
  • ISO 14001 Environmental Management System
  • OHSAS 18000 Occupational Health and Safety Management System
  • CE (Europe), UL (USA), and CCC (China) certifications

Quality Commitment

  • Strict compliance with national standards and contractual technical requirements
  • 72-hour full-load test after final assembly before delivery
  • Guaranteed on-time delivery, with compensation mechanisms for delays
  • Customer response within 24 hours; on-site service within 48 hours
  • Repair personnel remain on site until faults are fully resolved
  • Full warranty for quality-related issues, including repair, replacement, or return
  • Lifetime cost-based warranty after sale

Ordering Instructions

When placing an order, please specify the following technical details:

Basic parameters

  • Motor model: YKK3551-4
  • Rated power: 185 kW

Electrical parameters

  • Rated voltage: 6000 V
  • Rated frequency: 50 Hz

Performance parameters

  • Rated speed: 1500 r/min
  • Insulation class: F

Structural parameters

  • Mounting type: IMB3
  • Protection class: IP44 or IP54

Environmental conditions

  • Ambient temperature: –15°C to +40°C
  • Altitude: ≤ 1000 m

Important Notes

  • Refer to the product catalog before ordering to confirm specifications
  • Standard orders must clearly state model, power, voltage, frequency, noise level, and mounting type
  • Special requirements such as double shaft extension, terminal box position reversal, reverse rotation, tropical design, or outdoor anti-corrosion design must be specified in advance
  • From the drive end view, 2-pole motors rotate clockwise as standard; counterclockwise rotation must be specified at the time of order

Conclusion

The Xi’an Taifu Simo YKK Series (H355–1000) High Voltage Three-Phase Asynchronous Motor combines outstanding performance, reliable quality, and broad applicability, making it an ideal power solution for industrial applications.
With strict adherence to international quality standards and comprehensive after-sales support, Simo Motor ensures long-term, worry-free operation for customers worldwide.

For more information about YKK series high-voltage motors or customized power solutions, please contact the Simo Motor professional team.

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Technical Specifications

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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