Xi’an Lite SIMO Motor Co., Ltd is an electric company and a main enterprise specializing in the manufacturing of large/medium-sized, high/low voltage AC motors, DC motors, synchronous motors, and explosion-proof motors in the Chinese mechanical industry. As a comprehensive manufacturing and service supplier of motor design, manufacturing, mechanical processing, mold making, and assembling, SIMO ranks TOP in China’s motor industry regarding its scale of production and has maintained a fast-growing development trend for consecutive years.
Our comprehensive infrastructure enables us to control the entire manufacturing lifecycle, ensuring that every motore trifase (three-phase motor) leaving our facility complies with the highest standards of energy efficiency, structural integrity, and electrical safety. By integrating precision mechanical engineering with modern manufacturing workflows, we serve as a critical link in the global supply chain for heavy machinery, pump systems, ventilation drives, and mining machinery.
The Company was founded in 1955 originally and now has more than 60 years history of motor manufacturing and selling. The registered capital is 21.5 million RMB. SIMO has 3 manufacturing factories, one subsidiary factory, with fixed assets 380 million RMB and more than 1172 sets of advanced equipment. There are more than 1200 employees, more than 260 technical engineers, including 21 senior engineers, 15 expert engineers.
The three-phase AC induction motor (known in Europe and Latin America as motore trifase) remains the primary driver of modern industrial infrastructure. This technology relies on a rotating magnetic field generated in the stator by three-phase currents out of phase by 120 degrees. The rotor, whether a squirrel-cage design or wound rotor configuration, experiences induced currents, generating mechanical torque with high efficiency and reliability.
SIMO's high-voltage motor portfolio (ranging up to 10kV and 25,000 kW) minimizes transmission losses and cable sizes across long distances in mining, petrochemical, and municipal installations. Low voltage models provide excellent precision and cost benefits in plant integrations.
The YR, YRKK, and YRKS series utilize wound rotors with slip rings. This design permits variable resistance to be added to the rotor circuit, enabling high starting torque at low starting currents, which is essential for heavy mills and crushers.
Hazardous zones demand strict flameproof (Ex d) or dust ignition-proof (Ex tb) protection. Our YBX3, YBX4, YBX5, and YFB4 series prevent internal electrical arcs or heat from igniting external explosive atmospheres in mining and oil refineries.
Modern energy conservation directives mandate the transition toward ultra-premium efficiency grades. SIMO's development of the YE5 series (IE5 Ultra Premium Efficiency Motors) integrates advanced stator designs and high-grade magnetic materials to minimize losses. This design addresses the industrial demand for carbon reduction and lower total cost of ownership (TCO) across complex motor life cycles.
As a leading global manufacturer, China combines deep vertical integration, proximity to critical raw materials, and precision engineering ecosystems. For global procurement officers, utilizing SIMO's Chinese supply chain provides significant strategic advantages:
Raw Materials Control: China produces a substantial portion of the world's rare earth magnets, high-grade silicon steel laminations, and premium electrolytic copper. This ensures stable production schedules and predictable pricing even during global supply chain fluctuations.
Logistics Integration: Located in Xi’an, SIMO Motor is positioned within a primary logistics hub of the Silk Road Economic Belt, linking factory floor output directly to Central Asia, Europe, and major coastal shipping ports via the China-Europe Railway Express and domestic high-speed freight routes.
SIMO Motor maintains design and manufacturing capabilities covering all major types of motors. Our portfolio includes 34 major series, over 1,800 varieties, and 19,500 specifications, with power ratings ranging from 0.35kW to 25,000kW. Below is an overview of our main motor product lines:
YE3, YE4, YE5 Series: High-efficiency asynchronous motors engineered to meet IE3, IE4, and IE5 international efficiency standards. These motors reduce operating costs in continuous duty applications such as large scale fan systems, water pumps, and air compressors.
YVFE3, YVFE4, YVFE5 Series: High and low voltage variable frequency speed-regulating motors. Designed to operate under wide frequency bands in conjunction with modern VFDs, featuring reinforced insulation to withstand high dV/dt stresses.
YBX3, YBX4, YBX5, YFB4 Series: Flameproof low and high voltage motors engineered for hazardous areas. Certified for chemical processing, oil refineries, and environments containing explosive gas mixtures or combustible dust.
YX, YXKK, YXKS Series: Three-phase asynchronous high-voltage motors designed for industrial applications. They utilize air-to-air (KK) or water-to-air (KS) cooling configurations for operation in harsh environmental conditions.
T, TD, TK, TDMK Series: Large synchronous motors and generators (TFW series 350-5000kW). These machines provide power factor correction and high operational efficiency under steady-speed configurations.
Z2, Z4, Z Series: DC motors designed for steel rolling mills, paper machinery, extruders, and marine propulsion systems requiring precise torque control and wide speed ranges.
Procuring industrial equipment requires adherence to localized regulations, specific voltage profiles, and spatial constraints. SIMO's engineering team provides customized solutions to meet these requirements:
While the IEC standard provides standard parameters for frame sizes (shaft heights, flange specifications, mounting hole diameters), legacy industrial sites often require custom retrofitting. SIMO designs custom transition bases, specific shaft extensions (including tapered, double-shaft, or spline configurations), and modified terminal box positions to match existing footprints.
Electrical grid characteristics vary by region. We configure windings for various voltages and frequencies, including 380V, 400V, 415V, 440V, 690V, 3kV, 6kV, 6.6kV, 10kV, and 11kV at both 50Hz and 60Hz. Insulation systems use Class F and Class H materials, treated through vacuum pressure impregnation (VPI) processes to resist moisture, tropical environments, and altitude derating.
Technical support covers all phases of a project, from initial drawing review (providing complete 3D CAD/STEP files) to on-site testing. SIMO works with local engineering partners globally to supply commissioning assistance, vibration analysis, alignment checks, and spare parts supply.
SIMO has passed ISO9001 Quality System Certification, EU “CE", US “UL”, Russian "GOST", and other international standards. Our electric motors are applied in electricity, coal, petroleum, mining, metallurgy, railway, transportation, chemical industry, agriculture, water economy, aviation, navigation, and high technologies in China and abroad.
SIMO motors are used in heavy industries worldwide. Below are key applications for our three-phase systems:
Underground mines demand flameproof certifications. Our YBK3 and YBX3 series power conveyor systems, continuous miners, ventilation fans, and slurry pumps, operating reliably under heavy vibration, dust, and moisture.
Refining plants operate with volatile gases present. Our YBX4 and YBX5 explosion-proof motors prevent ignition in Zone 1 and Zone 2 environments, powering high-pressure pumps and gas compressors.
Large-scale municipal water networks require continuous pump operation. The YKS water-cooled high-voltage series offers low thermal stress and low noise levels, suitable for high-capacity pumping stations.
The industrial drive landscape is shifting toward digitization, energy conservation, and system integration. Understanding these trends helps businesses align their purchasing strategies with long-term technological developments:
As carbon taxes and environmental regulations tighten globally, upgrading to IE5 motors (like the YE5 series) helps plants lower power usage. This choice reduces operational costs over the motor's lifecycle.
SIMO designs smart motor interfaces that integrate temperature, vibration, and current sensors. These sensors connect to cloud-based diagnostic systems, allowing operators to schedule maintenance and prevent unscheduled downtime.
The use of variable frequency drives (VFDs) is growing. Modern induction motors (like the YVFE series) are designed with insulated non-drive end bearings to eliminate shaft currents caused by high-frequency switching.
Get authoritative answers to technical and commercial questions about China three-phase electric motors, certifications, and global project engineering.
These categories are defined by the IEC 60034-30-1 standard. IE3 is Premium Efficiency, IE4 is Super Premium, and IE5 represents Ultra-Premium Efficiency. Each step up reduces energy losses by roughly 10% to 15%. SIMO's YE5 series IE5 motors utilize optimized electromagnetic designs to meet these targets, lowering energy use in high-duty operations.
Explosion-proof motors use flameproof (Ex d) enclosures. The joints and shafts are engineered with precise flame paths. If gas penetrates the motor and ignites internally, the flame path cools the escaping gases below the ignition temperature of the surrounding atmosphere, preventing external explosions in hazardous areas.
Wound rotor motors are selected for applications requiring high starting torque under load combined with low starting current draw, such as ball mills, large crushers, and heavy conveyors. By connecting the rotor windings to an external resistor slider, starting currents can be managed to protect regional grid stability.
We design our windings to match regional requirements: 50Hz for Europe and Asia (e.g., 380V/400V/690V) and 60Hz for North American applications (e.g., 460V/575V). Additionally, our mechanical frames can be designed to comply with both IEC (metric) and NEMA (imperial) mounting standards, including custom terminal box configurations.
SIMO offers several cooling options: IC411 (standard surface cooling with external fan), IC611 (air-to-air heat exchanger, YXKK/YKK series), and IC81W (water-to-air heat exchanger, YXKS/YKS series). Water cooling (IC81W) provides high heat transfer efficiency and lower noise levels, making it suitable for environments with limited air circulation.
Yes, our YVFE3, YVFE4, and YVFE5 series are designed specifically for VFD operation. They feature reinforced wind insulation systems to handle voltage spikes, and are equipped with independent cooling fans (IC416) to prevent overheating when operating at low speeds.
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