OEM Mv Motor Companies & industrial

Premium Medium & High Voltage Motors

Explore our core engineering catalog designed for heavy duty industrial duties.

YJP series variable frequency speed regulating AC motor

LiteSIMO Motor: China’s Premium Electric Motor Manufacturer

Xi’an Lite SIMO Motor Co., Ltd stands as a cornerstone of the Chinese mechanical and machinery manufacturing sector. Founded originally in 1955, the company has accumulated over 60 years of dedicated experience in motor design, mold making, structural machining, core punching, assembly, testing, and comprehensive maintenance services.

SIMO ranks at the absolute forefront of China’s electrical motor industry in terms of production scale, processing capacity, and engineering capability. We specialize in producing an expansive catalog spanning large and medium-sized, high/low voltage AC motors, variable-frequency drives, heavy-duty DC motors, high-efficiency synchronous motors, and certified explosion-proof units. Through relentless engineering and strict testing standards, we support key infrastructure, industrial processes, and manufacturing plants worldwide.

Manufacturing Scale & Capacity

Our infrastructure allows us to build customized and highly specific MV and HV electric motors on demand.

21.5M

Registered Capital (RMB)

380M

Fixed Assets (RMB)

1,172+

Advanced Equipment Sets

1,200+

Professional Employees

Global MV Motor Commerce & Industrial Landscapes

Medium Voltage (MV) motors (typically rated from 1kV to 15kV) serve as the vital mechanical heart of heavy process industries. As global industrial ecosystems undergo a rapid transformation driven by carbon neutrality mandates (such as EU Green Deal, US Executive Order 14008, and China’s dual carbon goals), the demand for high-efficiency, reliable MV electric machines is reaching record levels. Industries such as municipal water distribution, heavy mineral processing, petrochemical extraction, and power generation consume vast amounts of electrical energy. In these environments, even a 0.5% optimization in motor efficiency translates to hundreds of thousands of dollars saved annually and significant reductions in carbon emissions.

Today, OEM MV motor manufacturers face distinct structural challenges: designing systems that maintain extreme durability under volatile thermal stress, providing advanced thermal management, and optimizing harmonic performance when integrated with variable frequency drives (VFDs). Advanced manufacturing techniques, including Vacuum Pressure Impregnation (VPI) with Class F and H insulation, are no longer optional—they are mandatory to survive harsh operational cycles, line-voltage fluctuations, and demanding environmental conditions.

The Transition to Super Premium Efficiency (IE4/IE5)

Internationally, efficiency classifications (IEC 60034-30-1) are pushing the limits of induction motor design. The transition from standard IE3 motors to IE4 and IE5 topologies requires substantial updates to slot geometry, rotor bar designs, and core laminations. Simo Motor has proactively adapted, introducing high-efficiency three-phase asynchronous motors like the YE4 and YE5 series, which leverage premium low-loss electromagnetic steel and optimized fan shapes to minimize copper losses and friction windage.

Motor Series	Voltage Ranges	Power Output (kW)	Key Applications & Environments
YX, YXKK, YXKS	6kV, 10kV	Up to 25,000 kW	Compressors, large fans, water pumps in electricity & steel mills.
YR, YRKK, YRKS	6kV, 10kV	Wound rotor type	High startup torque loads, ball mills, crushers, sugar mills.
YBX3, YBX4, YBX5	LV to HV options	Explosion-proof	Hazardous oil fields, natural gas compression, chemical synthesis.
T, TD, TK, TDMK	Medium / High Voltage	Synchronous series	Large reciprocating compressors, ore mills with high power factor needs.
Z2, Z4, Z Series	DC operation	Up to medium-large size	Metal rolling mills, paper machinery, marine propulsion, excavators.

Over 60 Years of Engineering History

Tracking the development milestones of Xi'an Lite SIMO Motor from 1955 to modern days.

1955

SIMO Motor established and led by the Chinese government, setting the foundation for heavy mechanical manufacturing.

1957

Relocated to the new specialized production plant in Xi'an City, expanding initial production capacity.

1966

Officially renamed as Xi'an Motor Factory following series of strategic industrial acquisitions and integrations.

1999

Reformed into a modern limited liability company from a state-owned factory to match market-driven models.

2005

SIMO Motor Group established, organizing 14 specialized subsidiaries for comprehensive component supply chains.

2006

Moved to the state-of-the-art high-tech industrial park, installing computerized testing centers and advanced tooling.

2009

Rebranded to Tech Full Simo Motor, aligning with advanced global standards and expanding international sales.

2019 - Present

Developing smart industrial motors, continuing our legacy as a world-leading electric motor manufacturer.

Technology Roadmap & Engineering Capabilities

Innovative design methodologies and advanced material science behind every SIMO electric motor.

Advanced VPI Insulation Systems

Our Vacuum Pressure Impregnation (VPI) system coats class F or H epoxy resins uniformly over windings, eliminating microscopic voids, preventing corona discharges, and drastically improving thermal dissipation under continuous operating cycles.

Dynamic Rotor Balancing

MV motors experience extreme centrifugal forces. Our fabrication process utilizes precision computerized dynamic balancing rigs. This reduces vibration amplitudes to levels far below standard ISO 1940 requirements, extending bearing lifespans.

Custom OEM Electromagnetic Modeling

Using finite element analysis (FEA) software, our R&D team designs customized electromagnetic slots. This optimizes performance under specific load characteristics, such as high-torque starts or speed control using VFDs.

Macro Industry Solutions & Localized Applications

Electric motors manufactured by Simo are utilized across several sectors in both Chinese and international markets. Our customized high and low voltage motors are adapted to meet the demands of challenging process environments:

Oil, Gas & Petrochemical: Demanding processes require motor enclosures that prevent internal explosions from igniting ambient hazardous gases. Our YBX3, YBX4, and YBX5 explosion-proof motors are designed to operate safely in refineries, pipelines, and gas compression stations under Zone 1 and Zone 2 conditions.
Mining & Steel Metallurgy: Powering ball mills, crushers, conveyers, and heavy rollers requires high starting torque and thermal durability. The wound-rotor YR, YRKK, and YRKS series allow operators to add external resistance, achieving smooth starts under maximum load without stressing the electrical grid.
Water Conservancy & Utilities: Large water distribution and wastewater facilities require continuous, high-reliability operation. Our YXKS water-cooled high-voltage motors operate with minimal noise and high heat transfer efficiency, ensuring smooth municipal water utility operations.
Power Plants & Energy Sector: Large draft fans, boiler feed pumps, and auxiliary equipment rely on YX/YXKK induction motors for high efficiency and low maintenance requirements.

SIMO industrial motor manufacturing and tooling

High voltage electric motor stator assembly

Global Certifications & Quality Compliance

SIMO maintains rigorous testing procedures and conforms to international regulatory standards.

Our quality control systems conform to the ISO9001 Quality System Certification. In addition, our motors have passed standard approvals including the European Union "CE", the United States "UL", and the Russian federation "GOST" certifications. This enables our motors to meet the compliance requirements of projects worldwide.

Industrial Electric Motor FAQ

Common technical inquiries regarding medium voltage, high voltage, and custom OEM motors.

What is the core difference between High Voltage (HV) and Medium Voltage (MV) motors?

Generally, Medium Voltage (MV) motors operate within the 1kV to 6kV range, while High Voltage (HV) motors run at 10kV, 15kV, or higher. HV motor designs require thicker insulation barriers (such as VPI-treated mica tapes) to prevent corona discharge and voltage tracking. This increases the overall motor frame size compared to low-voltage configurations of equivalent output power.

When should a wound rotor (slip ring) induction motor be used instead of a squirrel cage motor?

Wound rotor motors (e.g., YR, YRKK series) are suitable for applications requiring high startup torque under full load (such as ball mills or crushers). By inserting an external resistance into the rotor circuit via slip rings, starting torque is maximized while starting current is minimized. This protects the local electrical grid from high voltage drops.

How do VFD-driven MV motors handle harmonic distortion and shaft currents?

Variable Frequency Drives (VFDs) introduce high-frequency voltage harmonics that can cause insulation stress and bearing erosion from electrical discharge. At Simo, our VFD motors (such as the YVFE3 and YJP series) feature reinforced insulation systems, insulated bearings, and grounding brushes to divert shaft currents safely and prevent premature bearing wear.

What criteria determine the choice between air-to-air cooling (IC611) and water cooling (IC81W)?

Air-to-air cooled motors (e.g., YXKK series) are suitable for standard outdoor applications with sufficient space, as they utilize an external cooling fan and tubes. Water-cooled motors (e.g., YXKS series) are optimal for confined spaces, environments with high ambient temperatures, or where low noise levels are required. Water cooling provides high heat transfer efficiency but requires a constant clean cooling water supply.

How does SIMO verify explosion-proof ratings for hazardous area operations?

Our explosion-proof motors (such as the YBX3 and YBX4 series) are designed and tested according to international standard explosion-proof directives. They are certified for Zone 1, Zone 2, Group IIA, IIB, and IIC environments. The motor casings are engineered to contain internal explosions without letting sparks escape into the surrounding volatile atmosphere.