High-Quality Permanent Magnet AC Motor Manufacturer & Manufacturers

Global Leader in Premium Industrial Motors, Custom Synchronous Drives, and Advanced Explosion-Proof Machinery for Over 60 Years

The Global Shift Toward High-Efficiency PMAC Motors

Industrial operations worldwide are prioritizing energy conservation and carbon reduction, making Permanent Magnet AC Motors the benchmark of modern drive systems.

Unparalleled Efficiency Standards

Permanent Magnet AC Motors (PMAC / PMSM) eliminate rotor copper losses by utilizing high-coercivity rare-earth permanent magnets. This allows systems to achieve IE4 and IE5 efficiency levels easily, saving substantial electrical overhead in continuous operations.

High Torque Density & Compactness

With no need for magnetization current in the rotor, PMAC motors pack significantly higher torque and power outputs per frame size. Ideal for retrofitting tight machinery compartments without sacrificing torque capacity.

Extended Operational Reliability

Cooler rotor operating temperatures minimize stress on bearings and winding insulation. This directly reduces thermal wear, drastically expanding the mean time between failures (MTBF) in harsh processing environments.

ESTABLISHED IN 1955

Xi'an Lite SIMO Motor Co., Ltd.

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.

With a legacy spanning more than six decades, SIMO Motor has consistently driven innovation across mechanical transmission sectors. Our extensive manufacturing portfolio ensures that we meet international demand with precision-engineered products optimized for maximum productivity and rugged conditions.

60+
Years Industry Heritage
1200+
Skilled Employees
260+
Technical Engineers
380M
RMB Fixed Assets
SIMO Motor Factory Building

Unrivaled Production Capacity & Technology Ecosystem

Located in the heart of China's heavy industrial core, our state-of-the-art facility integrates advanced processing, comprehensive testing, and premium sourcing.

Advanced Facility & Machinery Assets

At SIMO, our manufacturing and physical assets form the foundation of our premium product quality. We operate 3 dedicated manufacturing plants and 1 specialized subsidiary facility. Our plant houses over 1,172 sets of advanced industrial machinery, including heavy-duty VPI vacuum impregnation systems, high-accuracy CNC boring mills, dynamic balancing machines, and a comprehensive motor performance testing center capable of full-load evaluations.

Supported by a registered capital of 21.5 million RMB, our scale enables us to manage bulk procurements, specialized customizations, and complex OEM designs efficiently while maintaining short lead times and stable pricing.

VPI Vacuum Impregnation CNC Boring Mills Dynamic Balance Testing Full-Load Performance Labs

Product Gallery

Diversified Electrical Machine Portfolios

SIMO's R&D covers every major class of electric motor. We manufacture 34 major series with over 1,800 varieties and 19,500 configurations, delivering outputs from 0.35kW up to 25,000kW.

High-Efficiency High-Voltage Motors

Our flagship **YX, YXKK, and YXKS** series three-phase asynchronous motors provide ultra-efficient performance under high-voltage configurations. Built with optimized electromagnetic circuits, low noise, and minimal vibration.

Wound Rotor & High Voltage Slip Ring

The **YR, YRKK, and YRKS** wound rotor series are designed for heavy-load startups. By adjusting rotor external resistance, these motors deliver high starting torque at low starting currents, making them ideal for heavy machinery.

Premium Efficiency IE3, IE4 & IE5

Our low voltage series **YE3, YE4, and YE5** line up directly with IEC standard efficiencies. Providing ultra-premium savings, these three-phase motors run cool, extending plant reliability and lowering carbon footprints.

Variable Frequency VFD Drives

The **YVFE3, YVFE4, and YVFE5** series feature independent cooling fans to maintain excellent heat dissipation under slow speeds and high constant torque cycles, ideal for closed-loop precision automation.

Explosion-Proof (Ex) Motors

Engineered for hazardous zones, our **YBX3, YBX4, and YBX5** flameproof lines feature heavy cast-iron enclosures designed to contain internal sparks, certified for gaseous, chemical, and dust-prone spaces.

Large Synchronous & DC Motors

From **T, TD, TK, and TDMK** mine milling motors to **Z2, Z4, and Z** series DC motors and TFW large synchronous generators, we provide specialized high-torque machinery built to exact site specifications.

Need more details? We supply 19,500+ custom electrical machine configurations designed to fit any industrial infrastructure.

Engineered for Global Industries & Local Environments

SIMO electric motors power mission-critical equipment under extreme environments worldwide, ensuring continuous operation under heavy loads.

Mining and Milling Operations

Our TDMK and YBK3 series synchronous and asynchronous explosion-proof motors are designed to drive heavy ball mills, grinders, conveyor belts, and ventilation shafts in dust-filled, abrasive mining areas. Our robust insulation prevents particulate contamination and failure.

Oil, Gas & Petrochemical

Explosion protection is non-negotiable. Our YBX4 and YBBP series explosion-proof variable frequency motors drive critical pumps, heavy-duty compressors, and air-cooling fans in volatile gas zones, providing reliable protection against igniting ambient vapors.

Municipal Water & Irrigation

In pumping installations, water supply projects, and steel mill cooling systems, our large YXKS and YRKS water-cooled motors handle demanding flow rates continuously while keeping operating temperatures low and maintenance intervals long.

60+ Years of Manufacturing Excellence

Follow our transition from a state-owned mechanical factory into a premier global exporter of heavy-duty industrial electric motors.

1955
SIMO Motor was established under state leadership, starting its journey to support China's early heavy-industry initiatives.
1957
Relocated to a newly designed production plant in Xi'an City, expanding manufacturing capacity and acquiring modern heavy equipment.
1966
Officially reformed and integrated as the Xi'an Motor Factory, consolidating tooling and engineering teams for mass motor assembly.
1999
Transitioned from a state-owned factory into a flexible, modern limited liability company, focusing on global market standards.
2005
Established SIMO Motor Group, expanding with 14 specialized subsidiaries covering mold-making, mechanical processing, and logistics.
2006
Moved to a modern high-tech plant, optimizing production flow with automated coil-winding and premium quality-assurance labs.
2009
Rebranded as Tech Full Simo Motor, aligning corporate strategy with international export standards and global compliance.
2019 - Present
Deeply invested in high-efficiency IE4 and IE5 permanent magnet synchronous designs, supplying premium drive products to over 40 countries.

Certified Engineering to International Standards

SIMO maintains rigorous testing procedures. We hold complete compliance certificates for global industrial deployment.

SIMO Quality Certificate 1
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SIMO has passed ISO9001 Quality System Certification, EU "CE", US "UL", and Russian "GOST" certifications. Our electric motors are widely applied in electricity, coal, petroleum, mining, metallurgy, railway, transportation, chemical industry, agriculture, water economy, aviation, navigation, and high technologies in China and abroad.

Strategic Procurement & Technical Consultation

Industrial motors are significant long-term investments. Ensuring you match technical parameters with operational environments avoids downtime and maximizes output.

1. Voltage & Grid Adaptability

Determine if your site grid requires low voltage (380V, 400V, 690V) or high voltage (6kV, 10kV) systems. Selecting the correct voltage range lowers current draw, wire costs, and energy loss.

2. IP Rating & Enclosure Types

For heavy coal mines or damp water systems, specify ingress protection levels (IP55, IP65, IP66). Choose custom enclosure cooling like IC411 (totally enclosed fan-cooled) or IC611 (air-to-air heat exchange).

3. Load Dynamics & Starting Requirements

High-inertia startup machines (like mining mills or crushers) need synchronous motors (TDMK series) or slip ring motors (YRKK series) to avoid current surges and high thermal stress during starting.

Future Trends in Electric Motor Technology

How technological advances are shaping the next generation of industrial electric drive systems.

Transition to IE5 Ultra-Premium Efficiency

Global emission laws are pushing industries toward IE5 efficiency. High-Quality Permanent Magnet AC Motors (PMAC) are the most practical solution, delivering massive energy savings compared to standard induction models.

IoT Integration & Predictive Maintenance

Modern heavy machinery now integrates temperature sensors, vibration probes, and real-time current monitors. Using smart diagnostic systems prevents sudden breakdowns and reduces unexpected downtime.

Advanced Rare Earth Magnet Chemistry

Recent advances in magnet alloys increase thermal limits and prevent demagnetization at higher temperatures. Modern PMAC motors operate safely in hot environments without losing torque capacity.

Technical Questions & Detailed Engineering Support

Get professional answers to common questions about industrial Permanent Magnet AC Motors, synchronous machines, and heavy mechanical drive setups.

How does a Permanent Magnet AC Motor (PMAC) compare to standard induction motors (ACIM)?
PMAC motors utilize high-grade permanent magnets embedded in the rotor, which completely eliminates rotor electrical losses (rotor copper loss). This design delivers significantly higher efficiency (often meeting IE4 and IE5 standards), increased torque density, a more compact footprint, and improved power factor across a wide range of speeds compared to traditional induction motors.
Can a PMAC motor run directly from the utility line (across-the-line)?
Standard PMAC motors cannot be started directly across-the-line without a Variable Frequency Drive (VFD). Since the rotor must synchronize with the stator's rotating magnetic field, starting directly at 50Hz/60Hz causes slip, preventing startup. A VFD or specialized controller is required to gradually ramp up the frequency and position control, ensuring a smooth, high-torque startup.
What are the primary applications for SIMO TDMK series synchronous motors?
The TDMK series is specifically designed for heavy-duty, constant-speed applications in harsh conditions, such as mine mills, ball mills, and grinders. They feature high pull-in torque, robust construction, and the ability to improve the facility's power factor, making them highly efficient for heavy-duty industrial machinery.
What is the operational benefit of a slip ring motor (e.g., YR, YRKK series) in heavy industries?
Slip ring (wound rotor) motors allow external resistance to be added to the rotor circuit during startup. This enables the motor to deliver high starting torque while keeping starting currents low. It is perfect for heavy-load equipment like crushers, mixers, and large fans, protecting the electrical grid from voltage drops.
How do explosion-proof motors (YBX3, YBX4, YBX5) contain internal ignitions?
Explosion-proof motors feature heavy cast iron or steel enclosures with precision-machined flamepaths. If an internal spark or gas mixture ignites within the motor enclosure, the housing is strong enough to contain the explosion. The exiting gases are cooled below the ignition temperature of the surrounding atmosphere, preventing external combustion in hazardous areas.
What standard testing does SIMO perform on motors before delivery?
Every SIMO motor undergoes rigorous factory quality tests, including stator winding insulation resistance testing, surge testing, winding DC resistance measurements, no-load characteristics evaluation, vibration checks, shaft alignment testing, and noise level measurement. For specialized projects, we conduct full-load heat runs and efficiency verification.
How does motor frame temperature affect lifetime expectancy?
The Arrhenius chemical rate equation applies to motor insulation: for every 10°C increase in operating temperature above the rated limit of the insulation class (Class F or H), the lifespan of the winding insulation is halved. High-efficiency PMAC motors run cooler, which preserves winding integrity and extends the overall life of the motor.
Does SIMO offer custom shafts, voltages, or mounting options?
Yes, SIMO is a complete manufacturing and engineering supplier. We design and custom-manufacture motors with non-standard shafts, unique mounting brackets, multi-voltage configurations (e.g., dual-voltage windings), specific cooling system positions, and integrated instrumentation (like RTD thermal sensors and space heaters).
What certificates do SIMO motors carry for international markets?
We hold ISO9001 Quality System Certification, EU "CE" markings, US "UL" safety listings, and Russian "GOST" certificates. Our manufacturing process meets IEC standards, allowing our motors to be deployed in heavy industrial facilities globally.