Explore our high-performance heavy-duty industrial electric motors engineered for maximum uptime.
Founded in 1955, Xi’an Lite SIMO Motor Co., Ltd (LITESIMO) stands as a monumental pillar in the Chinese mechanical and electrical drive manufacturing industry. We specialize in the end-to-end design, tooling, production, testing, and lifecycle support of large and medium-sized, high/low voltage AC and DC electric motors, synchronous systems, and highly specialized explosion-proof industrial drives.
Our expansive industrial complex features 3 state-of-the-art manufacturing plants and 1 specialized subsidiary facility. This infrastructure is powered by more than 1,172 sets of advanced manufacturing and quality inspection equipment, managed by a dedicated workforce of over 1,200 employees, including 260+ technical engineers, 21 senior engineers, and 15 state-level expert engineers.
Critical mechanical and structural considerations for modern industrial drive selection.
In modern industrial automation, mechanical alignment accuracy between the electric motor shaft and the driven machinery (such as pumps, gearboxes, fans, and compressors) is paramount. Misalignment is the leading cause of premature bearing wear, shaft fatigue, and coupling failures. This is where Flange Mount Electric Motors present a critical design advantage.
Flange-mounted motors are primarily classified under international standards like IEC 60034-7 and NEMA. Understanding the difference between the mounting orientations is crucial for application engineering:
When flange motors are mounted vertically (IM V1 configuration, shaft down), they face significant gravity-induced axial loads. Simo Motor integrates heavy-duty angular contact bearings or spherical roller thrust bearings in our V1 configurations. This configuration supports both the rotor weight and external hydraulic or mechanical thrust, ensuring reliable vertical pumping and mixing operations in harsh industrial fields.
How LITESIMO leverages automated advanced technologies to guarantee production consistency.
Our Class F and Class H insulation systems utilize state-of-the-art Vacuum Pressure Impregnation (VPI) equipment. Standard solvent-less resin impregnation eliminates void spaces in motor windings, preventing moisture intrusion, minimizing partial discharge, and significantly extending winding lifetime under variable-frequency operation.
Motor flanges demand extreme geometric tolerancing (runout, concentricity, and perpendicularity). We employ high-precision Japanese and German CNC horizontal machining centers to mill casting frames and turn shafts in a single setup, maintaining tolerances within micron levels.
Every rotor is dynamically balanced to ISO 1940 Grade G1.0/G2.5 standards to eliminate rotational vibration. Low vibration guarantees structural integrity of the flange mount and protects the connected shafts of high-speed centrifugal pumps and heavy-duty gearboxes.
Simo Motor maintains direct partnerships with China's tier-one raw material suppliers, including Baosteel for low-loss silicon steel laminations and Jiangxi Copper for high-grade oxygen-free copper. By maintaining a buffer inventory of crucial components (such as FAG/SKF/NSK bearings and high-tensile cast iron frames), we shield international procurement departments from global supply chain disruptions and offer stable lead times that outperform competitors by up to 25%.
A chronological path tracking 60+ years of technical breakthroughs and corporate growth.
SIMO Motor was officially established under government leadership, initiating the manufacturing of heavy industrial motors to support the country's foundational mechanical infrastructure projects.
Operations were moved to a new, expanded industrial facility in the historic manufacturing hub of Xi'an city, significantly scaling up production capability.
Following a series of strategic acquisitions, integrations, and technological upgrades, the company rebranded as Xi'an Motor Factory, consolidating its engineering supremacy.
Transitioned from a state-owned enterprise into a modern shareholding limited liability company, adopting global corporate management principles and accelerating R&D investments.
Formed the comprehensive SIMO Motor Group, integrating 14 dedicated subsidiaries to master the entire value chain from casting and tooling to system integration.
Relocated to a newly constructed, state-of-the-art facility equipped with automated precision machinery within the High-Tech Industrial Development Zone.
Officially renamed to Tech Full Simo Motor, expanding its export network to North America, Europe, Southeast Asia, and the Middle East.
Accelerating the production of IE4/IE5 ultra-premium efficiency asynchronous motors, smart permanent magnet synchronous motors (PMSM), and VFD-ready high-voltage systems.
Comprehensive specifications illustrating Simo’s diverse motor ranges.
Our mechanical engineering department configures custom flange mounts across our entire portfolio to suit specific torque demands, axial forces, and ambient conditions.
| Motor Series | Type / Configuration | Power Range | Voltage Options | Primary Industrial Applications |
|---|---|---|---|---|
| YX / YXKK / YXKS | High Efficiency HV Asynchronous | Up to 25,000 kW | 6kV, 10kV, 11kV, 13.8kV | Power stations, large fans, water supply pumps, compressor drives |
| YE3 / YE4 / YE5 | IE3 / IE4 / IE5 Ultra-Premium Efficiency | 0.35 kW - 1,000 kW | 380V, 400V, 415V, 660V | Pumps, machinery, gearboxes, HVAC, plant fans, automated lines |
| YVFE3 / YVFE4 / YVFE5 | Variable Frequency Speed Control | 0.55 kW - 2,000 kW | Low / High Voltage options | Steel rolling mills, conveyors, hoists, extruders, dynamic speed loads |
| YBX3 / YBX4 / YBX5 | Flameproof & Explosion-Proof (Ex d) | 0.18 kW - 3,000 kW | 380V, 660V, 1140V, 6kV, 10kV | Chemical refineries, coal mine ventilation, gas pipelines, oil extraction |
| Z2 / Z4 / Z Series | Medium / Large Scale DC Motors | Up to 5,000 kW | 110V - 1000V DC | Metallurgical rolling mills, paper machines, rubber extruders, marine propulsion |
| T / TD / TK / TDMK | Large Synchronous Motors & Generators | Up to 25,000 kW | 6kV, 10kV | Mining grinders, heavy reciprocate compressors, municipal water pumps |
Delivering specialized drive capabilities to support critical global industrial operations.
For municipal water distribution, desalination plants, and industrial drainage systems. Our B35 foot-flange and V1 vertical flange motors align directly with vertical turbines and high-flow centrifugal pumps, mitigating mechanical vibration and preventing fluid leakage at shaft interfaces.
Operating in environments with flammable gases (coal mines, oil refineries, drilling platforms). The YBX and YBK flameproof series offer robust enclosures engineered to contain internal explosions without igniting external atmospheric hazards, certified under strict Ex d IIBT4 and IIC categories.
Providing the high torque and shock tolerance required by iron ore grinders, cement kilns, and continuous overland conveyors. High-voltage synchronous motors (TDMK series) are tailored to deliver optimized power factors, reducing electrical demand while operating under continuous full-load conditions.
Engineering next-generation drive systems to meet future energy and automation demands.
The industrial electric motor industry is undergoing a structural paradigm shift driven by decarbonization policies, strict energy-efficiency regulations, and industrial digitalization. SIMO Motor is actively leading this transformation through several core technical roadmaps:
Our engineering team is actively commercializing the YE5 asynchronous series and Permanent Magnet Synchronous Motors (PMSM). Implementing high-density rare-earth permanent magnets eliminates rotor copper losses, providing up to 96.5% efficiency. This reduces operating costs and carbon footprint across high-operating-hour applications.
Future SIMO motor models feature integrated smart sensor ports. These sensors continuously monitor rotor vibration profiles, winding temperatures, insulation resistance, and bearing sound frequencies. When processed by cloud-based AI diagnostic software, these metrics predict bearing wear or winding faults before they trigger unscheduled factory downtime.
With the widespread use of variable frequency drives (VFDs) for process control, motors are subject to high voltage spikes and bearing currents. SIMO integrates insulated non-drive end bearings and internal grounding rings alongside VPI insulation, mitigating electrical pitting and extending system life under PWM drives.
To reduce overall load on flange couplings and machinery structures, Simo is optimizing structural castings. By using advanced structural simulations (FEA), we are removing excess metal mass from non-load-bearing areas of the motor casing while reinforcing structural high-stress points, creating highly compact, power-dense frames.
Navigating complex international certifications and regional standard specifications.
B2B industrial procurement agents require more than just a competitive quote; they require verified reliability, regulatory compliance, and responsive regional support. Xi’an Lite SIMO Motor has structured its manufacturing and engineering services to meet these stringent international requirements.
Every motor leaving our assembly lines is manufactured and tested in strict accordance with recognized quality systems. SIMO has successfully passed the ISO9001 Quality System Certification, the European Union's CE safety directives, the United States' UL safety listings, and the Russian Federation's GOST specifications. This ensures smooth customs clearance, simplified local regulatory compliance, and low insurance premiums for our clients' plants.
Standard motors often fail to meet specific plant environments. Our engineering division excels at customized design options, including specialized shaft extensions, auxiliary terminal box mountings, space heaters for moisture prevention, non-standard flange dimensions (e.g., custom NEMA C-face adapters for IEC motors), and integrated RTD temperature sensors. This flexibility allows engineering, procurement, and construction (EPC) contractors to integrate our motors directly into existing plant setups with zero modifications.
Engineering and procurement advice directly from our senior technical experts.
B5 flanges have clear, unthreaded mounting holes and a outer flange diameter larger than the motor frame body. They are mounted directly to the machine housing via bolts passing from the motor side. B14 flanges have tapped, threaded holes and an outer diameter smaller than the motor frame body, allowing mounting from the machine side. B35 configurations combine a B5 flange with structural mounting feet (B3), providing robust support for heavy, high-torque industrial systems where face-only mounting would induce too much stress on the flange housing.
Our explosion-proof (Ex d) motors are designed with high-strength, flameproof cast iron enclosures. The joints and mating surfaces are manufactured with tight clearances (flame paths). In the event of an internal gas explosion, the flame path cools and dampens the escaping hot gases before they can ignite the surrounding hazardous atmosphere. These motors are certified for gas groups IIA, IIB, and IIC, and temperature classes T1 to T4, ensuring safety in coal mines, oil refineries, and gas plants.
Compared to standard IE2 or IE3 motors, IE4 and IE5 motors significantly reduce internal resistive and electromagnetic losses. This is achieved by utilizing higher grade silicon steel laminations, optimized stator slot designs, and increased copper fill factors. In continuous-running operations (such as water treatment pumps or ventilation fans), upgrading to IE4/IE5 can reduce facility electrical consumption by 2% to 5%, offering full capital payback within 12 to 18 months of operation.
Yes. Our YKS and YXKS high-voltage series are designed to handle both soft-start operations and variable frequency drives (VFD). For VFD operations, we apply specialized corona-resistant insulation materials to protect windings from high dv/dt voltage spikes, and we install insulated bearings at the non-drive end to prevent electrical pitting caused by common-mode currents.
We maintain an ISO9001 certified quality control system. Every motor undergoes routine testing (winding resistance, insulation resistance, no-load verification, vibration levels, and dielectric strength) before shipment. For large or high-voltage drives, full load testing and type testing are conducted in our state-of-the-art test laboratory. Motors are packed in heavy-duty, sea-worthy wooden cases with vacuum barriers and moisture-absorbing desiccant to prevent corrosion during ocean transport.
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