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.
Founded on a bedrock of engineering precision, SIMO Motor integrates state-of-the-art Research and Development (R&D) with scalable, high-capacity fabrication capabilities. Serving heavy industries globally, SIMO has become synonymous with efficiency, reliability, and technological adaptability, meeting the stringent demands of modern power generation, petrochemicals, municipal irrigation, and heavy machinery mining networks.
For more than 60 years, the evolution of SIMO Motor has run parallel to the industrial modernization of mainland China. With a registered capital of 21.5 million RMB, 3 specialized manufacturing factories, and 1 subsidiary plant housing over 1,172 sets of advanced industrial machinery, our legacy of engineering evolution is marked by the following key historic milestones:
SIMO Motor was established, initially conceptualized and guided directly by central governmental industrial initiatives.
Relocated manufacturing facilities to a newly planned, expanded plant site in Xi'an City, expanding mechanical production capabilities.
Officially renamed to Xi'an Motor Factory following strategic mergers and system-wide asset integrations.
Transitioned from a state-owned industrial enterprise into a highly dynamic, privately held limited liability company.
Establishment of the SIMO Motor Group, integrating 14 specialized subsidiaries under one unified management system.
Moved operations to a modern, state-of-the-art technological manufacturing plant in Xi'an High-tech Zone.
Rebranded to Tech Full Simo Motor, optimizing global operations and focusing heavily on international standards compliance.
Continuing to pioneer high-efficiency motor engineering, developing cutting-edge IE3, IE4, and IE5 standard powertrain units.
Industrial electric motors consume over 45% of the world's total electricity. To curb emissions and lower operational overheads, the global industrial sector has prioritized the deployment of premium-efficiency systems. Defined by the international IEC 60034-30-1 standard, IE3 represents the threshold of "Premium Efficiency." Our engineering group at SIMO Motor has systematically targeted and mitigated internal energy losses to exceed these benchmarks, bringing tangible "Information Gain" to our global procurement partners.
Energy losses in asynchronous motors are categorized into five fundamental zones: Stator I²R copper loss, Rotor I²R slip loss, Core losses (hysteresis and eddy currents), Friction & Windage loss, and Stray Load loss. Our IE3 and IE4 design architectures tackle these via:
While an IE3 premium efficiency motor commands a higher initial capital expenditure compared to legacy IE1 or IE2 units, the lifecycle cost evaluation highlights a massive Return on Investment (ROI). Over a typical 10-to-15-year operational lifecycle, energy consumption accounts for roughly 95% to 97% of a motor's total cost of ownership. Transitioning to IE3 cuts waste by 15% to 30%, which translates directly into significant bottom-line savings and carbon offsets in heavy continuous duty cycles (S1 duty).
| Efficiency Class (IEC) | Typical Stator/Rotor Losses | Ideal Application Profile | Average Return on Investment (ROI) |
|---|---|---|---|
| IE1 (Standard Efficiency) | Baseline Losses | Intermittent Duty (S2/S3), Auxiliary tasks | Not Recommended for Modern Plants |
| IE2 (High Efficiency) | 10% - 15% Lower than IE1 | General purpose drives, ventilation systems | 2.5 - 3 Years |
| IE3 (Premium Efficiency) | 25% - 30% Lower than IE1 | Continuous Duty (S1), Pumps, Compressors, Mining Mills | 1 - 1.5 Years (Under S1 Continuous Duty) |
| IE4 (Super Premium) | 35% - 40% Lower than IE1 | High-duty chemical pumps, heavy conveyor mainframes | < 1 Year in high energy cost zones |
SIMO Motor's Research and Development encompasses 34 major product series, over 1,800 varieties, and more than 19,500 distinct specifications. The power output ranges dynamically from 0.35 kW up to an impressive 25,000 kW, serving low voltage, medium voltage, and high voltage infrastructure requirements. Explore our primary series classification below:
Featuring the YE3, YE4, and next-generation YE5 series three-phase asynchronous motors. Engineered for optimal efficiency, low temperature rise, and exceptional stability under industrial variable torque loads.
Including the YX, YXKK, and YXKS high-voltage high-efficiency series, alongside YR, YRKK, and YRKS wound rotor motors. Built for high starting torque, low starting current, and extreme mechanical durability in heavy-duty plants.
Represented by YBX3, YBX4, and YBX5 explosion-proof high/low voltage asynchronous motors. Certified flameproof structures engineered for oil, gas, chemical processing, and underground coal mine operations.
YVFE3, YVFE4, and YVFE5 variable frequency low/high voltage motors. Purpose-built for integrated VFD operation, providing wider speed ranges and outstanding thermal dissipation under low-speed operation.
T, TD, TK, and TDMK series synchronous motors, and TFW (350kW - 5000kW) large synchronous generators. Offering high power factor correction, excellent grid compliance, and unparalleled structural rigidity.
Z2, Z4, and Z series medium/large DC motors. The preferred choice for applications requiring smooth torque control, wide-range speed regulation, and high overload capacities like steel rolling and marine propulsion.
To operate successfully across diverse global regulatory landscapes, SIMO Motor adheres to rigid testing protocols. We have established comprehensive quality management frameworks and proudly maintain active certifications for major international markets, ensuring safe and reliable operation in critical infrastructures worldwide.
The industrial cluster surrounding Xi’an and broader Shaanxi province provides a dense network of suppliers of high-grade copper, non-oriented silicon steel, high-tensile shafts, and structural castings. This proximity dramatically cuts logistical turnaround times for materials, allowing SIMO to offer accelerated production lead times on customized projects compared to Western counterparts.
By blending localized engineering expertise (capitalizing on China's massive concentration of electrical engineering graduates) with highly automated winding, machining, and dynamic balancing assemblies, SIMO delivers unmatched performance-to-cost ratios. Global companies secure European or American-grade motor reliability while achieving substantial capital expenditure savings.
Unlike rigid automated production lines that only support catalog dimensions, SIMO's extensive production scale enables deep engineering customization. We adapt frame mounting dimensions, modify shaft configurations (double extensions, hollow shafts), deploy specialized explosion-proof terminal designs, and custom-engineer insulation systems for specific hot, humid, or sub-zero installation zones.
Every industrial powertrain system leaving our Xi'an plant undergoes rigorous factory acceptance tests (FAT). Our load-test bays allow real-world load testing of high-voltage systems up to 10kV, verifying temperature rise curves, efficiency factors, vibration severity (conforming to ISO 10816 standards), and acoustic noise emissions to ensure zero defects upon job site delivery.
Industrial plants operate in harsh environments, demanding high uptime and reliability. Over the past 60 years, SIMO Motor has engineered system-wide powertrain solutions for multiple macro sectors, optimizing operational reliability under challenging environments:
Underground mining operations present significant hazards due to explosive gas accumulations (methane) and heavy dust loads. SIMO's YBK3 series flameproof motors and YFB4 series dust explosion-proof motors are specifically engineered for underground coal mines, conveyor systems, jaw crushers, and sag mills. Their robust cast-iron construction and IP55/IP56 enclosure ratings guarantee dust-tight, spark-free continuous service under heavy shock loads.
Refineries, chemical processing installations, and natural gas transport networks require explosion-proof compliance. The YBX3 and YBX4 low-voltage and high-voltage flameproof asynchronous series provide Ex d IIC T4 Gb protection levels. Combined with YBBP variable-frequency adjustable systems, chemical plants can achieve precise flow regulation through pumps and blowers while satisfying strict hazardous area safety protocols.
For municipal water pumping, wastewater aeration, and steel mill rolling plants, SIMO supplies large-scale three-phase synchronous motors (T, TDMK series) and slip-ring wound rotor motors (YR/YRKK/YRKS). The TDMK series synchronous motors are widely selected for heavy mill drives due to their high operating power factor, which assists in stabilizing factory electrical networks while minimizing grid utility penalty fees.
As global grids integrate more renewable power, industrial processes must adapt. Upgrading legacy fixed-speed pumps and fans to variable speed systems driven by SIMO YVFE3/YVFE4 low-voltage and YVFE5 high-voltage AC motors yields enormous energy savings. By operating at optimal speed-load curves, plants reduce mechanical wear, extend bearing lifecycles, and significantly lower daily power draw.
IE3 (Premium Efficiency) and IE4 (Super Premium Efficiency) are international efficiency classes defined by IEC 60034-30-1. On average, an IE4 motor reduces electrical losses by approximately 15% to 20% compared to an IE3 motor of equivalent output power. This efficiency gains are achieved by using higher-grade silicon steel laminations, optimized stator slot designs, larger rotor bars, and advanced dynamic design configurations. This makes IE4 motors ideal for long-duty applications, such as chemical pumps and HVAC blowers operating continuously.
Wound rotor motors (YR, YRKK, YRKS series) are selected for applications requiring extremely high starting torque combined with low starting current, or for loads with high rotational inertia. By connecting external resistance banks to the rotor circuit via slip rings, operators can control the torque-speed curve during startup. This is crucial for cement kilns, rock crushers, and large conveyor networks, preventing high current spikes and electrical sag across the facility's power supply network during commissioning phases.
SIMO manufactures specific explosion-proof product families (YBX3, YBX4, YBX5 for general hazardous zones; YBK3 for underground coal mining). These systems utilize flameproof enclosures (Ex d) designed to contain internal gas explosions without releasing sparks or hot gases into the surrounding environment. Our explosion-proof motors undergo rigorous pressure tests, impact tests, thermal endurance checks, and dust ingress assessments, and hold approvals such as MA certificates, China CCC, and international EU ATEX-equivalent standards.
Direct-on-line (DOL) starting of high-voltage motors draws starting currents up to 6 to 8 times the rated operating current. High-voltage soft start cabinets temporarily limit the starting voltage, smoothing the current curve and accelerating the rotor gradually. This reduces mechanical stress on motor windings, shafts, and couplings, while protecting upstream transformers and switchgear from voltage fluctuations. SIMO customizes soft start cabinets to match our high-voltage motor series (YX, YXKK, YRKK) for optimal system integration.
Despite the rise of AC motors driven by VFDs, DC motors (Z2, Z4, and Z series) remain crucial in heavy industries. They are preferred in applications requiring high overload capacities, exceptionally smooth torque control at low speeds, and wide-range constant power speed regulation. Examples include steel rolling mills, paper manufacturing machinery, mine hoists, and plastic extruders, where maintaining precise torque controls at zero-speed or near-zero speed is essential for product quality and process safety.
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