Empowering Global Heavy Industries with High-Efficiency, Severe-Duty Electric Motors and Custom Power Systems since 1955
Xi’an Lite SIMO Motor Co., Ltd. is a prominent enterprise specializing in the manufacturing of large and medium-sized, high and low voltage AC motors, DC motors, synchronous motors, and explosion-proof motors in the Chinese mechanical industry.
SIMO has evolved into a comprehensive manufacturing and service supplier of motor design, manufacturing, mechanical processing, mold making, assembling, and smart diagnostic solutions. The company proudly ranks at the absolute top of China's motor manufacturing sector regarding the scale of production and technical patents, maintaining an accelerating, fast-growing development trend for consecutive decades.
Totally Enclosed Fan Cooled (TEFC) electric motors are the backbone of modern heavy operations. By sealing the internal components from external contaminants while utilizing an external fan to blow air across the cooling fins, TEFC motors deliver rugged durability across demanding scenarios.
Modern procurement directors balance initial investment with long-term energy savings. Our IE4 and IE5 ultra-premium efficiency motors are engineered to reduce total lifetime power consumption by up to 18%, neutralizing upfront procurement premiums within the first 12 months of deployment.
Operating in mines, petrochemical facilities, or maritime environments requires robust protection. Our TEFC frame designs comply with IP55, IP56, and explosion-proof dust certifications (YFB3/YFB4 series), ensuring total resistance against fine particles and pressurized liquid ingress.
Optimized with advanced variable frequency speed regulation systems (YJP/YVFE3), our motors offer flawless performance under shifting torque demands, protecting system components from thermal overload and mechanical shock during transient cycles.
Founded originally in 1955 under state oversight, SIMO Motor has compiled over 68 years of electric motor design and manufacturing history. The registered capital is 21.5 million RMB. Today, SIMO maintains 3 modern production bases, 1 specialized subsidiary, fixed assets exceeding 380 million RMB, and an inventory of 1,172 sets of high-precision machining and testing equipment.
Our research and development cover a expansive range of motors, featuring 34 major series, over 1,800 varieties, and 19,500 distinct specifications. The capacity spans from 0.35kW to 25,000 kW, supporting complex processes across high-voltage AC, variable frequency AC, synchronous generators, and heavy-duty DC technologies.
The dusty, high-vibration environment of mine sites requires heavy-duty enclosures. Our YR, YRKK, and YRKS series wound-rotor high voltage motors offer large starting torques at low starting currents, ideal for grinding mills, heavy shredders, and long-distance conveyor systems.
Safety in hazardous atmospheres containing volatile gases or fine dust is paramount. Our YBX3, YBX4, YBX5, and dust explosion-proof YFB3/YFB4 series provide certified containment capabilities, meeting strict global explosion safety regulations.
For continuous pumping systems and large aeration blowers, high reliability is key. Simo's T, TD, TK, and TDMK series large-size synchronous motors optimize power factors and improve overall plant energy efficiency.
Our Z2, Z4, and custom Z series DC motors provide exact torque adjustment over wide speed ranges, fulfilling the high-stress demands of hot/cold metal rolling mills, paper manufacturing, and marine propulsion systems.
To maintain our market leading position, LITESIMO is investing in smart drivetrain technology and eco-friendly manufacturing methodologies.
Integrating vibration, acoustic, and thermal sensors directly into TEFC motor casings, allowing remote monitoring systems to predict maintenance cycles before system errors occur.
Applying low-loss, ultra-thin silicon steel sheets and advanced insulation materials to reduce internal copper and iron losses, aiming for the IE6 efficiency standard.
Integrating permanent magnet synchronous machines (PMSM) with robust TEFC architectures to handle highly dynamic duty cycles under heavy industrial profiles.
SIMO products undergo strict evaluation protocols. We have achieved ISO9001 Quality System, EU "CE", US "UL", and Russian "GOST" certifications, guaranteeing compliance with varying local market standards.









