Explore our state-of-the-art heavy industry medium voltage (MV) explosion-proof electromotors, built to operate reliably in hazardous gas, vapor, and combustible dust environments.
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, and assembling. The Company ranks TOP in China's motor industry as to its scale of production, and has maintained a fast-growing development trend for consecutive years.
With an unwavering commitment to quality and engineering precision, SIMO provides custom OEM electrical solutions that power critical infrastructure worldwide. From complex, customized configurations to standard production runs, we leverage over six decades of manufacturing intelligence to secure operating systems in demanding thermal, environmental, and chemical conditions.
Years of Innovation
Active Employees
R&D Engineers
Fixed Assets (RMB)
Modern procurement of Medium Voltage (MV) Explosion-Proof (Ex) electromotors has evolved beyond simple hardware acquisition. For global engineering procurement firms (EPCs) and operators in the Oil & Gas, petrochemical, mining, and heavy chemical manufacturing sectors, sourcing must mitigate operational risks while optimizing Total Cost of Ownership (TCO). Principal challenges include:
Simo Motor maintains a comprehensive R&D and manufacturing pipeline covering all varieties of electric motors, comprising 34 major product series, over 1,800 varieties, and 19,500 standard specifications. The power output ranges from 0.35kW up to 25,000kW. Main motor products include:
| Motor Series | Type | Power Range | Hazardous Zone Compliance | Cooling Method |
|---|---|---|---|---|
| YBX5 Series | Explosion-Proof Induction | 0.35 kW - 2,000 kW | Zone 1 & 2 (Gas), Zone 21 & 22 (Dust) | IC411 (Self-Ventilated) |
| YXKK / YXKS | High-Voltage High-Efficiency | 185 kW - 25,000 kW | Safe Area / Non-Sparking Options | IC611 (Air-Air) / IC81W (Water) |
| YBBP Series | VFD Explosion-Proof | 0.55 kW - 1,000 kW | Ex d IIC T4 Gb / Flameproof | IC416 (Forced Ventilation) |
| YFB3 / YFB4 | Dust Explosion-Proof | 0.75 kW - 375 kW | Zone 21 & Zone 22 (Combustible Dust) | Totally Enclosed IP65 |
Medium Voltage Ex motors are the workhorses of critical infrastructure. Customization at this scale requires deep integration into macro-industrial processes:
As the industrial world transitions towards Industry 4.0, SIMO Motor is actively integrating digital diagnostics with traditional flameproof design:
Reinforced structures designed to contain internal explosive pressures.
Vacuum Pressure Impregnation ensuring voids-free insulation resistance.
Rigorous operational validation across full power configurations.
SIMO is certified under international standards to verify our manufacturing quality and product safety in volatile operating fields.
SIMO has passed ISO9001 Quality System Certification, EU “CE”, US “UL”, Russian “GOST”, and so on. Electric motors are widely applied in electricity, coal, petroleum, mining, metallurgy, railway, transportation, chemical industry, agriculture, water economy, aviation, navigation, high technologies, and other areas in China and abroad.
By enforcing a zero-defect quality policy across all three manufacturing facilities and one subsidiary plant, we operate more than 1,172 sets of advanced equipment to secure consistency across flameproof tolerances, winding insulation thickness, and mechanical bearing alignment.
Key technical and procurement answers for electrical engineering leads and B2B sourcing managers.
The differences primarily lie in energy efficiency ratings and thermal management. The YBX3 series meets IE3 premium efficiency guidelines. YBX4 is designed to align with IE4 super-premium specifications, and YBX5 represents the next generation of IE5 ultra-premium efficiency. Higher efficiency decreases operating temperatures and electrical losses, providing a wider safety buffer in hazardous atmospheres.
High frequency switching in VFDs generates common-mode voltages that can cause spark discharges across the bearings, leading to fluting and premature failure. To prevent this, SIMO incorporates insulated non-drive-end (NDE) bearings and high-performance shaft grounding brushes to divert shaft currents safely to the frame, ensuring long bearing lifetimes.
Yes. Standard flameproof motors (e.g., YBX5 series) are engineered for gas explosive atmospheres (Zone 1/Zone 2, Group IIA/IIB/IIC). For dust hazards (Zone 21/22), we supply the YFB3 and YFB4 series. These are dust-ignition-proof (Ex t) with IP65 ingress protection, preventing combustible dust from entering the housing and maintaining low external surface temperatures.
Our medium-voltage and high-voltage motors utilize Class F insulation systems (rated for 155°C) with a Class B temperature rise limit (80K), providing an operational safety margin. The windings undergo Vacuum Pressure Impregnation (VPI) with solventless epoxy resin, ensuring a moisture-proof, chemical-resistant, and mechanically stable stator package.
With over 260 technical engineers on staff, SIMO offers extensive OEM/ODM support. This includes custom shaft dimensions, dual-shaft extensions, non-standard mounting configurations (IM B3, V1, B35), specialized terminal boxes (including phase-segregated configurations), and custom heat-exchanger cooling designs (air-to-air IC611, water-to-air IC81W, or force-ventilated systems).
Further electric propulsion products, high-voltage cabinets, and premium efficiency configurations available for industrial application.
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