OEM Medium Voltage Ex Motor Factories & Electric Propulsion

Engineering Heavy-Duty Explosion-Proof Motors for High-Risk Global Industries | Since 1955

Premier Medium & Low Voltage Motor Selection

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SIMO Factory Plant View
LITESIMO Profile

Xi’an Lite SIMO Motor Co., Ltd

Xi’an Lite SIMO Motor Co., Ltd is an electric company and a main enterprise specializing in the manufacturing of large/medium-sized, high/low voltage AC motors, DC motors, synchronous motors, and explosion-proof motors in the Chinese mechanical industry.

As a comprehensive manufacturing and service supplier, SIMO covers the entire ecosystem of motor design, mechanical processing, mold making, assembly, and testing. SIMO ranks TOP in China’s motor industry as to its scale of production, and has maintained a fast-growing development trend for consecutive years, delivering premium industrial solutions globally.

68+
Years of History
1200+
Employees
260+
Technical Engineers
380M
Fixed Assets (RMB)
Corporate History & Heritage

Founded in 1955 originally, SIMO has more than 60 years of history in high-end electric motor manufacturing and selling, establishing a legacy of safety and precision.

1955
SIMO Motor was established and led by the government.
1957
Moved to the new production plant in Xi'an City.
1966
Changed name to Xi'an Motor Factory after a series of acquisitions and integrations.
1999
Reformed into a limited company from a state-owned factory.
2005
SIMO Motor Group established, with 14 subsidiaries.
2006
Moved to the modern high-tech and advanced new manufacturing plant.
2009
Changed name to Tech Full Simo Motor.
2019 - Present
Continuously expanding as one of the best motor manufacturers in the world.

Advanced Production Scale & Infrastructure

The registered capital of SIMO is 21.5 million RMB. Our facilities boast 3 specialized manufacturing factories and 1 subsidiary factory, spanning massive square footage with fixed assets amounting to 380 million RMB.

Our production floor houses more than 1,172 sets of advanced equipment, allowing us to maintain extreme precision in balancing, VPI impregnation, and explosion-proof pressure testing.

With more than 1,200 employees, our talent pool features over 260 technical engineers, including 21 senior engineers and 15 expert engineers specialized in explosive gas atmospheres and medium voltage isolation systems.

Simo Motor Production Line
Medium Voltage Ex Motor Technical Whitepaper

Understanding the engineering challenges of deployment in hazardous atmospheres, volatile environments, and heavy-duty grid applications.

Macro-Industry Solutions

Modern commercial industrial setups demand absolute reliability. In petro-chemical, mining, and oil refineries, motors are subjected to voltage surges, corrosive gases, and thermal stress. High and Medium Voltage Ex motors (such as YBX3, YBX4, and YFB3 series) deliver explosive gas resistance while maintaining high operational efficiency (IE3, IE4, IE5 standards). They prevent ignition by using robust structural shells designed to withstand internal explosion pressures.

Global Commercial Landscape

OEM manufacturers around the world look for standardizations to minimize system downtime. The shift towards Variable Frequency Drives (VFD) speed-regulated setups requires insulation structures capable of handling high-frequency voltage spikes (dV/dt). SIMO's comprehensive custom medium voltage DC motors, synchronous generators, and variable-frequency AC motors comply with worldwide voltage patterns (ranging from 3kV to 11kV) to ensure smooth integration into grids.

Local Support & Compliance

Industrial safety requires absolute compliance with local regulations. Our explosion-proof motor product lines carry standard certifications: ISO9001 Quality System Certification, EU "CE", US "UL", and Russian "GOST". Operating in high-risk zones, such as deep-well coal mines and dust-concentrated agricultural sectors, demands customized local support. We assist our clients in technical audits, commissioning, and system maintenance.

Technical Roadmap & Future Outlook

As energy conservation policies tighten worldwide, SIMO is driving next-generation power technology forward by designing Ultra-Premium Efficiency (IE5) motors. We are actively expanding the power ranges up to 25,000 kW and incorporating digital twins for online status tracking.

Advanced VPI Insulation
Our Class F/H vacuum pressure impregnation (VPI) process guarantees high dielectric strength and chemical resistance against moisture, salt-spray, and corrosive gas penetration.
Smart Monitoring (IIoT)
Integration of low-power smart sensors for real-time tracking of winding temperature, vibration spectrum, bearing status, and thermal growth, reducing unexpected downtime.
IE5+ Ultra-Efficiency
Upgrading magnetic stator cores and optimizing rotor bars to reduce internal resistance, meeting energy standards while minimizing global industrial carbon footprints.
Comprehensive R&D and Manufacturing Scope

We supply a vast catalog of industrial electric motors, catering to all major global operations and high-end machinery configurations.

Product Spectrum & Parameter Limits

SIMO's R&D and manufacturing covers all types of electric motors. Our portfolio includes 34 major series, over 1,800 varieties, and more than 19,500 individual specifications. The power capacity ranges from a compact 0.35 kW up to an ultra-heavy 25,000 kW.

Our primary motor systems comprise the following major models:

  • YX, YXKK, YXKS Series: High-voltage, high-efficiency three-phase asynchronous motors designed for extreme durability.
  • YR, YRKK, YRKS Series: Wound rotor high-voltage motors designed for high startup torque applications.
  • YE3, YE4, YE5 Series: High-efficiency asynchronous motors meeting premium international efficiency benchmarks.
  • YVFE3, YVFE4, YVFE5 Series: Variable frequency and variable speed motors for high and low voltage installations.
  • YBX3, YBX4, YBX5 Series: Certified explosion-proof high/low voltage three-phase asynchronous motors for hazard-prone zones.
  • T, TD, TK, TDMK Series: Large synchronous motors specifically customized for heavy-duty reciprocating mill operations.
  • TFW Series: Heavy-duty synchronous generators spanning power options from 350 kW to 5,000 kW.
  • Z2, Z4, and Z Series: Medium and large size DC motors developed for metal rolling, marine propulsion, and heavy lifting.

Precision Production & Testing Facility Images

Industrial Applications & Real-World Use Cases

Our electrical motor units are operating globally under extreme thermal conditions, marine environments, and hazardous chemical atmospheres.

Oil & Gas Extraction
Operating offshore drills and refinery pumping stations requires flameproof Ex motors. The YBX3 and YBK3 series are specifically built to withstand ambient environments dense with flammable hydrogen, methane, or ethylene gases.
Deep-Well Coal Mining
Underground mines present a combination of coal dust and gas. Our YBK3 series flameproof three-phase motors run exhaust fans, ventilation compressors, and heavy coal-crushing machinery, mitigating dust ignition hazards.
Marine Propulsion
Large size synchronous and DC motor architectures (T & Z series) power thrusters, water injection pumps, and high-capacity winches, ensuring safe operations in high-humidity marine conditions.
International Quality Certifications

Every SIMO motor is certified to meet leading safety and quality standards, including EU CE, US UL, Russian GOST, and ISO9001.

Certificate 1
Certificate 2
Certificate 3
Certificate 4
Certificate 5
Certificate 6
Certificate 7
Certificate 8
Certificate 9
Certificate 10
Certificate 11
Certificate 12
Frequently Asked Questions

Find authoritative answers to common technical, compliance, and procurement questions regarding our Medium Voltage Ex Motors.

Q1: What are the main differences between Ex d, Ex e, and Ex n protection concepts?
Ex d (Flameproof): The enclosure can withstand an internal explosion of a gas-air mixture and prevent its transmission to the surrounding atmosphere. It is widely used in high-risk Zone 1 environments.
Ex e (Increased Safety): Measures are applied to prevent the possibility of excessive temperatures and the occurrence of arcs or sparks inside the motor during normal operation.
Ex n (Non-sparking): Specifically intended for Zone 2, where explosive hazards are rare. This concept minimizes the risk of sparking during normal operation to prevent ignition.
Q2: Why are medium voltage levels (6kV / 10kV) preferred in large-scale operations?
Medium and high voltage ratings reduce the electric current required to drive heavy loads. Lower currents allow for smaller cable sizes and minimize I²R copper losses. For massive industrial projects (above 200kW up to 25,000kW), MV motors improve grid stability and system-wide efficiency.
Q3: How does SIMO ensure the reliability of motors operating under variable frequency drives?
We use specialized variable-frequency winding insulations (such as our YVFE3, YVFE4, and YVFE5 series) designed with high thermal resistance and corona discharge suppression. Grounding brushes and insulated non-drive end bearings are installed to prevent bearing pitting caused by shaft currents.
Q4: What parameters are critical to choose the right motor for dust explosion atmospheres?
For dust environments (e.g., grain elevators, flour mills, or pharmaceutical factories), look for dust-ignition-proof ratings like our YFB3 dust-proof series. Important parameters include IP sealing grades (IP65 or above) and temperature limits to keep surface temperatures below the ignition threshold of surrounding dust clouds.
Q5: Can I request customized voltage frequencies and output levels from SIMO?
Yes, our design department supports custom voltage configurations (including 3.3kV, 6kV, 6.6kV, 10kV, and 11kV) and dual-frequency options (50Hz / 60Hz) to fit global standard grids and bespoke electrical environments.
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