Discount Medium Voltage Electric Motor Supplier & Electric Engineering

Global Industrial Powertrain Solutions: High-Voltage, Heavy-Duty Induction & Synchronous Motors Engineered for Optimal Operational Lifecycle TCO.

LITESIMO Motor Manufacturing Facility

About Xi’an Lite SIMO Motor Co., Ltd.

LITESIMO is an industry-leading enterprise specializing in the engineering, design, and manufacture of large and medium-sized, high/low voltage AC motors, DC motors, synchronous motors, and explosion-proof motors within the Chinese mechanical industry.

As a comprehensive manufacturing and service supplier, SIMO integrates motor design, advanced mechanical processing, mold making, and precision assembly. Our scale of production ranks at the very top of China’s motor sector, establishing LITESIMO as a key player in global industrial motor supply. We maintain a sustained growth rate driven by high-tech equipment and deep engineering expertise.

Unparalleled Manufacturing Depth: With over 1,200 employees, 260 technical engineers, and 15 senior expert engineers, our operations are optimized to produce highly reliable products tailored for demanding operating environments.
60+ Yrs
Manufacturing History
21.5M
Registered Capital (RMB)
380M
Fixed Assets (RMB)
1,172+
Sets of Advanced Equipment

Our Historical Timeline

Established in 1955 under state oversight, SIMO has spent over 60 years refining the design and fabrication of rotating electrical machinery. The history below details our transition from a state-owned plant to a premier international motor supplier.

1955
SIMO Motor is established and led by the Chinese government to build structural industrial infrastructure.
1957
The facility relocates to a modern production plant in Xi'an City, expanding early production capability.
1966
Officially renamed as the Xi'an Motor Factory after a series of state-led acquisitions and industrial integrations.
1999
Reformed from a state-owned factory into a limited liability company, accelerating market-oriented product design.
2005
Establishment of the SIMO Motor Group, expanding to include 14 specialized subsidiaries.
2006
Production relocates to a newly constructed, state-of-the-art advance tech plant in Xi'an's high-tech zone.
2009
Corporate rebranding to Tech Full Simo Motor, optimizing global distribution networks.
2019 - Present
Continuous innovation in high-voltage variable speed systems, IE4/IE5 ultra-premium efficiency, and smart digital motors.

R&D Capability & Production Parameters

LITESIMO's engineering and research infrastructure covers the entire lifecycle of industrial electric motor production. Our catalog contains 34 major series, over 1,800 varieties, and more than 19,500 individual specifications.

The power output span ranges from 0.35 kW to 25,000 kW. Our principal motor designs include:

  • YX, YXKK, YXKS Series: High-voltage, high-efficiency three-phase asynchronous motors for severe duty applications.
  • YR, YRKK, YRKS Series: Wound rotor (slip ring) high-voltage motors designed for high-inertia startups.
  • YE3, YE4, YE5 Series: High and ultra-premium efficiency asynchronous motors conforming to IEC standard efficiency ratings.
  • VFD Driven Systems (YVFE3, YVFE4, YVFE5): Variable frequency and speed-adjustable high/low voltage motors.
  • YBX3, YBX4, YBX5 Series: Explosion-proof high/low voltage three-phase asynchronous motors for hazardous zones.
  • T, TD, TK, TDMK Series: AC synchronous motors engineered for heavy grinding mills and compressors.
  • Generators & DC Motors: TFW large size synchronous generators (350kW-5000kW) alongside Z2, Z4, and Z series industrial DC motors.

Global Procurement, Localization, & Supply Chain Advantages

Procuring medium voltage (MV) and high voltage (HV) electric motors requires balancing initial capital expenditure (CAPEX) with long-term operational costs (OPEX).

VPI Insulation Engineering

Our medium voltage winding design uses a Vacuum Pressure Impregnation (VPI) process with Class F/H epoxy resins, eliminating air pockets to ensure high dielectric strength and resistance to moisture and chemical attack.

China Supply Chain Integration

Raw material sourcing (cold-rolled silicon steel laminations and high-purity electrolytic copper) combined with centralized manufacturing in Xi'an allows SIMO to supply reliable products without quality compromise.

International Safety Compliance

We manufacture systems aligned with key safety standards, including explosion-proof configurations certified under ATEX, IECEx, and China’s national Ex standard, ensuring safe operation in hazardous atmospheres.

Optimizing Medium Voltage Motor Total Cost of Ownership (TCO)

For industrial engineering procurement, the purchase price of an electric motor represents only a fraction of its lifetime cost. Energy consumption typically accounts for over 90% of a motor's TCO. Selecting a high-efficiency model (such as our YE4 or YE5 series) reduces energy loss. Our electrical designs minimize stray load losses, rotor I2R losses, and windage friction, which helps lower operating expenses in continuous-duty applications like water utilities, mine ventilation, and petrochemical refinement.

Stator Winding Heat Dissipation & Frame Selection

Operating temperature directly influences insulation life. A 10°C increase in operating temperature above the insulation limit halves insulation lifespan. SIMO designs feature optimized cooling geometry: TEFC (Totally Enclosed Fan Cooled, IC411), TEAAC (Totally Enclosed Air-to-Air Cooled, IC611), and WPII (Weather Protected Type II). These configurations maintain stable internal temperatures even under variable loads or high ambient conditions.

Certificate & Quality System Display

SIMO has established and maintains a certified quality management system. Our designs comply with ISO9001, EU "CE", US "UL", and Russian "GOST" requirements, allowing our motors to integrate with global power grids.

SIMO Quality Certificate
SIMO CE compliance documentation
SIMO Certification Document
SIMO Factory Certificate
SIMO ISO Certification
SIMO GOST Certificate
SIMO Safety Standard Compliance
SIMO Verification Registry
SIMO Industrial Accreditation
SIMO Test Lab Standard
SIMO Motor safety certificate
SIMO Motor Certificate
SIMO Motor Verification Document
SIMO Quality Assurance Seal
SIMO High Voltage Motor Safety Proof
SIMO Flameproof Standard Document

Industrial Assembly & Machining Precision

LITESIMO employs advanced machining, computer-controlled winding machine suites, and high-capacity testing bays to verify mechanical balance, vibration signatures, and dielectric performance before shipment.

Stator winding and coil assembly line
Rotary shaft machining and dynamically balancing
Heavy duty housing machining and alignment
Electric testing bay monitoring instrumentation
Completed high voltage squirrel cage motor
Rotor copper bar fabrication process
Finished wound rotor motor with slip ring enclosure
VPI pressure vessel system detail
Finished cast iron motor frame storage

Technical Q&A: Industrial Medium Voltage Motors

Common technical inquiries from project engineers, procurement managers, and maintenance teams regarding high-power electric drivetrains.

What are the key technical differences between Low Voltage (LV) and Medium Voltage (MV) motors? +
Low voltage motors generally operate below 1,000V (e.g., 380V, 460V, 690V). Medium voltage motors operate at voltage tiers ranging from 2.3kV to 13.8kV (most commonly 3.3kV, 6kV, and 10kV). Standard LV motors can experience high operating currents at high power ratings, requiring larger, more expensive supply cables. MV motors reduce operating current for the same power output, permitting smaller copper cable cross-sections and lowering overall distribution system losses. However, MV motors require specialized insulation systems like Vacuum Pressure Impregnation (VPI) and precise stator core engineering to withstand electrical stresses.
Why is the vacuum pressure impregnation (VPI) system essential for medium voltage motors? +
VPI replaces traditional dip-and-bake insulation methods. The stator is placed in a vacuum chamber to remove air and moisture from the winding structure. High-grade solventless epoxy resin is then introduced under pressure, filling all voids within the mica tapes. This creates a solid, void-free insulation block with improved thermal conductivity, resistance to mechanical vibration, and protection against moisture, corrosive chemicals, and electrical breakdown.
How does SIMO ensure compliance with international hazardous area standards (ATEX, IECEx)? +
Our explosion-proof motor series (such as the YBX3, YBX4, and YBK3) are manufactured according to strict safety parameters. They feature flameproof enclosures designed to contain internal explosions without propagating flames to the surrounding atmosphere. Components like terminal boxes are designed with specified flame paths and clearances, and are sealed with heavy duty gaskets. All models undergo hydrostatic pressure testing and flame path clearance verification to comply with national and international hazardous area classifications.
What is the impact of VFD operation on medium voltage motor insulation? +
Variable Frequency Drives (VFDs) use high-frequency pulse-width modulation (PWM) to control motor speed, which can introduce high voltage spikes (dV/dt) to the winding insulation. To prevent premature insulation failure, SIMO YVFE series motors are built with VFD-optimized stator insulation systems, which include corona-resistant wire and stress-grading tapes on the end windings. Additionally, insulated bearings or grounding rings are utilized to prevent damaging shaft currents from causing bearing fluting.
Which cooling method (IC411 vs. IC611) is best suited for severe duty applications? +
The choice depends on the environment and motor size. IC411 (Totally Enclosed Fan Cooled, TEFC) uses external frame ribs and a shaft-mounted fan to dissipate heat. It is cost-effective and reliable for smaller to medium-power MV motors in outdoor or dusty environments. IC611 (Totally Enclosed Air-to-Air Cooled, TEAAC) uses an air-to-air heat exchanger mounted on top of the motor frame. It provides uniform cooling for high-power ratings, protecting internal windings from dirty or corrosive ambient air.
How does procurement from a direct Chinese manufacturer like SIMO optimize overall CAPEX? +
Sourcing directly from SIMO combines localized material supply chains (such as high-grade steel laminations and copper) with integrated manufacturing processes. By managing design, casting, winding, and testing in-house at our high-tech facility, we reduce intermediate supplier markups. This enables us to offer competitive pricing while maintaining engineering standards validated by ISO9001, CE, UL, and GOST certifications.