OEM Ex-Proof High Voltage Motor Suppliers & Company

Decades of Engineering Mastery in Explosion-Proof, High-Voltage, and Custom AC/DC Motor Configurations for Hazardous Industrial Environments Worldwide.

E-E-A-T Verified Manufacturer

Xi’an Lite SIMO Motor Co., Ltd

Xi’an Lite SIMO Motor Co., Ltd is an electric company, main enterprise specializing in the manufacturing of large/medium-sized, high/low voltage AC motors, DC motors, synchronous motor, and explosion-proof motor in the Chinese mechanical industry. SIMO is a comprehensive manufacturing and service supplier of motor design, manufacturing, mechanical processing, mold making, assembling. The Company ranks TOP in China’s motor industry as to its scale of production, and has maintained fast-growing development trend for consecutive years.

60+ Years of Expertise
21.5M Registered Capital (RMB)
1200+ Skilled Employees
260+ Technical Engineers
Xi'an Lite SIMO Motor Manufacturing plant facility image

A Legacy Built Over Six Decades

The Company was founded in 1955 originally and now has more than 60 years history of motor manufacturing and selling. The registered capital is 21.5 million RMB. SIMO has 3 manufacturing factories, one subsidiary factory, with fixed assets 380 million RMB and more than 1172 sets of advanced equipment. There are more than 1200 employees, more than 260 technical engineers, including 21 senior engineers, 15 experts engineers.

1955

SIMO Motor established and led by government initiation.

1957

Relocation to the newly built industrial production facility in Xi'an city.

1966

Name transitioned into Xi'an Motor Factory after systematic consolidation and asset integration.

1999

Reformed successfully into a limited liability company from a state-owned industrial enterprise.

2005

Establishment of SIMO Motor Group, commanding 14 dedicated subsidiaries.

2006

Strategic relocation to our modern, high-tech, and advanced new manufacturing base.

2009

Transitioned brand name to Tech Full Simo Motor to align with global high-tech marketing.

2019 - Present

Continuing on the path to be one of the best global electric motor manufacturers through innovation and AI-driven precision.

Manufacturing Capabilities

Precision Facilities & Machinery

With fixed assets valued at over 380 million RMB, SIMO operates 3 primary manufacturing centers and 1 subsidiary plant. Our technological capability is supported by over 1,172 sets of high-precision heavy machinery. This extensive tooling permits the micro-tolerances required for explosion-proof safety.

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Comprehensive Product Range & Power Envelope

Covering 34 major series, 1,800 varieties, and 19,500 distinct specifications spanning 0.35kW to 25,000kW.

HV & High-Efficiency AC Motors

Featuring YX, YXKK, YXKS high-efficiency three-phase asynchronous motors. Designed with advanced thermal modeling and low-loss magnetic flux profiles to significantly reduce power consumption under load.

Wound Rotor HV Motors

Engaged in heavy mechanical drive profiles, our YR, YRKK, YRKS wound rotor series are tailored for operations requiring high starting torque with low starting currents.

Explosion-Proof Technology

Commanding the safety space with the YBX3, YBX4, YBX5 series of explosion-proof three-phase asynchronous motors. Custom-welded heavy-duty flameproof enclosures built for petrochemical and coal dust threats.

Synchronous & Milling Motors

Optimized for mining and processing environments, our T, TD, TK, TDMK series synchronous motors provide exceptional reactive power correction and continuous velocity torque curves.

Industrial DC Drive Lines

Our Z2, Z4, and Z series DC motors are engineered for steel rolling mills, paper manufacturing, and heavy hoisting where infinite speed adjustment and constant torque ranges are vital.

Variable Frequency VFD

YVFE3, YVFE4, and YVFE5 variable frequency speed regulation systems support continuous performance modulation under high and low voltage installations.

Whitepaper: Engineering Ex-Proof Motors for High-Voltage Environments

High-voltage explosion-proof (Ex-proof) motors represent the pinnacle of rotating electrical machine engineering. They operate at voltage configurations typically ranging from 3kV to 11kV, powering critical infrastructure in industries where ignitable mixtures of gases, vapors, or dust are consistently present. The primary challenge in designing these motors lies in containing any internal explosion, preventing heat propagation to the outer environment, and avoiding electrical sparking that could result in catastrophic failure.

1. Chinese Manufacturing Scale and Supply Chain Integration

China's industrial landscape has transitioned from high-volume assembly to deep technical design leadership. SIMO Motor, as an industry pioneer since 1955, exemplifies this shift. Our factory base leverages localized steel refinement ecosystems, providing access to silicon laminations with optimized permeability and low core losses.

Furthermore, our manufacturing process incorporates fully automated VPI (Vacuum Pressure Impregnation) winding treatment systems. By fully evacuating moisture and air pockets from the stator insulation matrix, we achieve exceptional resistance against electrical tracking and thermal fatigue. This localized raw material integration allows SIMO to offer highly competitive pricing structures without compromising on international standards of quality.

"The reliability of an explosion-proof motor is determined by its weakest thermal path. Using class F and class H insulation ratings, along with rigorous structural finite element analysis (FEA), Chinese manufacturing centers are now setting international benchmarks for high-voltage thermal longevity."

2. Macro-Industry Solutions & Application Integration

HV explosion-proof motors are not stand-alone components; they are critical nodes in industrial automation networks. Here is how SIMO integrates with macro-level challenges:

  • Oil & Gas Refining: Powering large-scale centrifugal compressors, crude oil transmission pumps, and air-cooled heat exchangers. Motors must conform to Ex d or Ex de flameproof containment configurations.
  • Deep Coal Mining Operations: Driving heavy-duty conveyor systems, ventilation fans, and mineral slurry pumps. Our TDMK and YBX series are designed to withstand structural shocks and high dust concentrations (Ex t ratings).
  • Chemical Process Operations: Providing drive power for chemical mixers, reactors, and high-pressure injection systems where corrosion resistance and ingress protection (IP56 or IP66) are mandatory.

3. Future Trends: AI-Enabled Monitoring, Digital Twins & IE5 Efficiency

The next decade of motor engineering is defined by efficiency upgrades and digital intelligence. The industry is rapidly adopting the IE4 and IE5 efficiency standards (represented by our YE4 and YE5 motor series). This reduces global carbon footprints by lowering energy losses up to 30% compared to legacy installations.

Furthermore, modern high-voltage motors are increasingly integrated with thermal, vibration, and magnetic flux sensors. This real-time telemetry allows predictive analytics to predict bearing wear and winding deterioration before a physical failure occurs.

Explosion-Proof Motor Technical Range Matrix

Series Class Enclosure Class Voltage Ranges Thermal Insulation Primary Industrial Sector
YBX3 / YBX4 / YBX5 Flameproof (Ex d) 380V - 10,000V Class F / H Chemical Processing & Petrochemical
YFB4 Series Dust Protection (Ex t) 380V - 1140V Class F Grain Milling, Coal Handling & Woodworking
YRKK Series Slip-Ring / Wound Rotor 6,000V - 10,000V Class F Mining Crushers, Mills & Steel Works
YKK / YXKK Squirrel Cage IP54 / IP55 6,000V - 10,000V Class F Large Water Pumps, Fans & Compressors

Certificate Display & Global Compliance

Our production line conforms to ISO9001 Quality System Certification, EU "CE", US "UL", and Russian "GOST" standards.

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Explosion-Proof HV Motor FAQ

Crucial information compiled by our Senior Engineering team regarding safety, certification, and customization parameters.

What distinguishes YBX3, YBX4, and YBX5 explosion-proof series?
The difference lies primarily in their efficiency ratings. The YBX3 complies with China's Grade 3 energy efficiency (equivalent to IE3). YBX4 steps up efficiency values (equivalent to IE4), and YBX5 represents ultra-high efficiency standards (equivalent to IE5). This results in lower active losses and decreased thermal stress on insulation materials over long operational life.
How does SIMO Motor guarantee flameproof protection in high-voltage designs?
Our design parameters utilize thick, high-tensile cast iron or welded steel plate enclosures. All joint surfaces (flamepaths) are machined to precise tolerances to cool escaping internal gases below the ignition threshold of surrounding atmospheric agents. Additionally, independent terminal boxes isolate the line connections to prevent spark transmission.
Can these motors be operated via Variable Frequency Drives (VFD)?
Yes. Our YVFE3, YVFE4, and YVFE5 lines are engineered for VFD operation. These motors feature insulated bearings on the non-drive end to block destructive shaft currents, along with custom windage bypass mechanisms to ensure reliable cooling at lower motor operational speeds.
What custom configurations are available for international orders?
We offer extensive OEM/ODM customization. This includes custom shaft dimensions, tailored structural mountings, dual-chamber terminal enclosures, specific low-temperature heater modules, and specialized cooling classifications such as IC411 (self-ventilation) or IC611/IC81W (heat exchanger / water-cooling jacket).
What standards certifications are available for international projects?
SIMO products carry EU "CE", US "UL", Russian "GOST", and Chinese "CNEx" certifications. Our quality management systems operate under a strictly audited ISO9001 structure, ensuring traceability from raw metal ingots to final test-bay execution.