Browse our high-performance low/high voltage three-phase induction, explosion-proof, and variable frequency motors customized for harsh industrial operation.
Xi’an Lite SIMO Motor Co., Ltd (known globally as SIMO Motor) stands at the pinnacle of the industrial electromechanical sector, recognized as a leading enterprise specializing in large, medium-sized, high-voltage, and low-voltage AC/DC electric motors, synchronous systems, and explosion-proof powertrains. Throughout its history, SIMO has acted as a key pillar in the development of heavy machinery and energy infrastructure.
Our integrated manufacturing and service ecosystem spans the entire engineering lifecycle—from advanced custom design and mechanical processing to mold making, structural testing, and full-load assembly operations. Standing at the top tier of China's electromechanical industry, SIMO continues to drive dynamic technological iterations, sustaining compound growth through relentless engineering innovation and strict supply chain reliability.
Over six decades of growth, transitioning from a state-owned industrial plant to a leading high-tech global motor conglomerate.
Deep engineering insights into flange interface designs, shaft tolerance parameters, and critical mechanical stress management.
Flange-mounted electric motors require precise mechanical coupling interfaces to ensure zero-axial misalignment under high torsional stress. Our designs follow standard IEC configurations: IM B5 (D-Flange) with clearance holes, IM B14 (C-Face) with tapped holes, and vertical variants like IM V1. The alignment tolerances are calculated below standard limits to prevent premature bearing fatigue.
Under vertical mounting setups (such as pump impellers and gearboxes), the motor bearings absorb massive axial and radial forces. SIMO designs utilize heavy-duty rolling element bearings (NSK or FAG) combined with specialized thrust bearings in large frame sizes. High-precision shaft runout tolerances (under 0.04mm) are maintained through precision cylindrical grinding.
Flange couplings are susceptible to structural resonance and vibration transmission to the driven machine. SIMO motors undergo dynamic balancing to Grade G1.0/G2.5 (ISO 1940 standard). By reducing vibration velocities down to 1.5 mm/s, we guarantee quieter operations, minimized structural fatigue, and extended operational lifespans in continuous setups.
In vertical orientations (such as the IM V1 design), mechanical seals (IP55, IP56, or IP66) are integrated to prevent liquid ingress along the shaft, particularly in chemical processing plants or cooling tower installations. Dual inner-outer bearing caps, labyrinth seals, and grease-relief systems protect the windings from particulate and chemical contaminants, minimizing downtime and maximizing the total cost of ownership (TCO) efficiency.
Covering 34 major series, 1,800 varieties, and over 19,500 individual specifications ranging from 0.35kW to 25,000kW.
Our workhorse offerings include the YX, YXKK, and YXKS series high-voltage, high-efficiency three-phase asynchronous motors. In addition, we manufacture the YR, YRKK, and YRKS series wound rotor (slip ring) high-voltage motors, designed for high-inertia startups. For low-voltage environments, our premium YE3, YE4, and YE5 series asynchronous motors comply with strict international IE3, IE4, and IE5 efficiency classes, reducing energy waste across pump, fan, and compressor networks.
For applications requiring precise velocity control under variable load profiles, we produce the YVFE3, YVFE4, and YVFE5 series variable frequency high/low voltage motors. When explosive vapors, gases, or combustible dusts are present, our YBX3, YBX4, and YBX5 series explosion-proof high/low voltage asynchronous motors offer reliable containment, backed by international explosion-proof standards.
Designed for heavy industries with low rotational speeds and high power requirements, the T, TD, TK, and TDMK series synchronous motors provide power factor correction and consistent speeds under high-stress loads, such as ore milling. Additionally, the TFW series (350kW to 5,000kW) large-scale synchronous generators supply reliable electrical generation for marine and backup emergency applications.
For heavy industrial environments that require wide speed ranges and smooth torque profiles, the Z2, Z4, and Z series DC motors deliver reliable starting torque. These units are supported by our customized High Voltage Soft Start Cabinets, which protect the electrical grid from inrush currents and reduce stress on mechanical components during system startup.
Exploring efficiency milestones, smart motor integration, and next-generation environmental insulation designs.
Developing new rotor structures, including permanent magnet-assisted synchronous reluctance technologies (PMaSynRM). This achieves ultra-low rotor loss, exceeding IE5 requirements and preparing for upcoming IE6 efficiency standard frameworks.
Integrating vibration, temperature, and current sensors directly within the motor housing. Connecting this hardware to edge computing gateways enables predictive maintenance, notifying operators of potential issues before they cause unplanned downtime.
Transitioning to eco-friendly, corona-resistant insulation systems (Class H and higher). Utilizing solvent-free, low-emission resins combined with biodegradable ester lubricants reduces environmental impact in sensitive operations.
Providing customized electromechanical drives for complex, hazardous, and high-load industrial systems worldwide.
Our explosion-proof flange motors (such as the YBX4 and YFB4 series) are designed to isolate sparks and internal combustion. They are widely used on offshore platforms, refining towers, and fuel pipelines where volatile gases or fine dusts pose ignition risks.
Operating in mines requires robust equipment. Our TDMK synchronous motors and YBK3 flameproof variants are engineered for heavy start-up loads, supporting continuous operation in milling machines, conveyors, and ventilation fans.
Vertical flange-mounted motors (IM V1) support high-capacity axial flow pumps used in municipal water supplies, flood drainage, and large irrigation canals, operating reliably under humid and wet conditions.
Leveraging automated manufacturing, rigorous quality control, and vertical supply integration to deliver global solutions.
At our Xi'an manufacturing complex, SIMO utilizes Factory 4.0 principles to control the entire manufacturing process. With over 1,172 sets of advanced production equipment, we utilize automated winding systems, CNC lamination presses, and advanced vacuum pressure impregnation (VPI) systems. VPI ensures that the stator windings are fully saturated with resin, eliminating air voids to provide moisture resistance, high dielectric strength, and heat dissipation.
Our raw material supply chain relies on long-term partnerships with leading steel and copper producers. This vertical integration secures high-grade, low-loss silicon steel sheets and 99.99% pure oxygen-free copper. By managing these materials directly, we stabilize production costs and shorten delivery times, even for large-scale high-voltage projects.
Before shipment, every motor undergoes comprehensive testing in our advanced test center. With testing capabilities up to 25,000 kW, we run full-load heat runs, vibration spectra analysis, shaft current checks, and insulation integrity tests. This quality assurance ensures that every motor meets its performance specifications before field installation.
Helping global procurement teams align technical specifications with international efficiency and safety frameworks.
We manufacture products to meet both international standards, supporting projects globally. Stators, shafts, and flange faces can be customized to match standard IEC metric frames or NEMA imperial dimensions, ensuring direct fit-for-use replacement on imported machinery.
Procurement is more than initial purchase cost. SIMO motors prioritize low energy losses and high durability. High-efficiency motors (IE4/IE5) reduce operational electrical costs, which often represent over 95% of a motor's lifetime cost, delivering long-term savings.
SIMO motors meet strict international requirements, complying with local safety and environmental standards worldwide.
SIMO has achieved comprehensive certifications, including ISO9001 Quality System Certification, European Union CE, United States UL, and Russian GOST. Our explosion-proof motors are certified to ATEX and IECEx standards, allowing safe deployment in hazardous zones globally. Our global partner network provides field engineering support, spare parts distribution, and technical assistance, ensuring prompt service for your operations.
Detailed answers to common questions about industrial flange motors, mounting options, and technical configurations.
High-capacity solutions designed for mining, chemical processing, and large-scale power generation.
Lite Simo
