Explore our premium selection of heavy-duty high-voltage, explosion-proof, and custom synchronous industrial electric motors.
Understanding the physics, insulation constraints, and mechanical designs required to run high-capacity electric drives.
Running industrial operations at high transmission voltages such as 11kV or 13.8kV eliminates the need for bulky step-down substation transformers directly upstream of your main machinery. This drastically decreases copper cable cross-sections, minimizes transmission losses, and improves overall electrical efficiency. However, operating at 13.8 kV introduces massive dielectric stresses that low-voltage and medium-voltage motors never encounter.
At 13,800 V, the air's breakdown strength is easily reached in tight clearances, risking severe corona discharge, slot discharges, and rapid deterioration of stator windings. Mitigating these risks requires highly specialized VPI (Vacuum Pressure Impregnation) insulation systems, precise corona-shielding painting, and meticulous electromagnetic slot configuration.
To withstand continuous electrical pressures up to 13.8 kV, SIMO motors employ a state-of-the-art Class F (or Class H) insulation architecture. The form-wound stator coils are wrapped in specialized mica-fiberglass tapes and then consolidated through a complete Vacuum Pressure Impregnation (VPI) process using solventless epoxy resins. This removes micro-voids within the slots, preventing the onset of Partial Discharge (PD).
Additionally, the winding coils are shielded using semi-conductive slot liners and silicon carbide-impregnated grading tapes. This controls the voltage gradient where the coil leaves the stator core slot, neutralizing the potential for surface discharges.
| Parameter Specification | Standard Range | High Voltage (HV) Engineering Limit |
|---|---|---|
| Operating Voltage Options | 6,000 V / 10,000 V | Up to 13,800 V (13.8 kV) |
| Insulation Class | Class F | Class H (VPI Consolidated) |
| Frame Size Range | 355 mm - 1000 mm | Custom Heavy-Duty Cast Iron/Steel Plate |
| Cooling Methods (IEC) | IC411 (TEFC) / IC611 (TEAAC) | IC81W (TEWAC - Water-to-Air Cooled) |
| Starting Method Compatibility | Direct-on-Line (DOL) / Reactor | VFD Compatible / Custom Soft Starters |
A manufacturing legacy backed by numbers and proven industrial delivery capability.
lITESIMO Company: 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.
Our infrastructure includes 3 dedicated manufacturing factories, 1 subsidiary plant, backed by fixed assets totaling 380 million RMB. We house more than 1172 sets of advanced equipment to handle precise machining, dynamic balancing, and high-voltage coil winding. Our workforce consists of over 1200 employees, featuring a core technical unit of 260+ engineers, which includes 21 senior engineers and 15 nationally recognized industry experts.
SIMO Motor established and led by government.
Move to the new plant in Xi'an city.
Change name into Xi'an Motor Factory after series acquiring and integrating.
Reformed into limited company from state-owned factory.
SIMO motor group established, with 14 subsidiaries.
Moved to the high tech and advanced new plant.
Change name into Tech Full Simo Motor.
Still on the way to be one of the best motor manufacturers globally.
Combining the strength of China's heavy industrial hub with localized execution capabilities worldwide.
Situated in Shaanxi's heavy machinery manufacturing cluster, SIMO leverages immediate access to first-grade raw materials. From high-permeability cold-rolled silicon steel sheets to high-purity electrolytic copper windings, we maintain control over raw material procurement. This enables rapid lead times and significant structural cost advantages for large-frame motors.
Our engineering services map to local utility grid regulations across Europe, the Americas, and APAC. We provide comprehensive local engineering support, including commissioning assistance, vibration diagnostics, and rapid critical spare-parts delivery. We ensure our motors meet local health and safety, grid integration, and environmental laws.
Before leaving the factory, every 13.8kV motor undergoes a rigorous battery of tests in our advanced testing facilities. These include polarization index (PI) checks, tan delta insulation evaluation, rotor dynamic balancing at full speed, and no-load/full-load losses verification, ensuring flawless on-site commissioning.
Where high-voltage efficiency meets tough operating environments across the globe.
SIMO's R&D and manufacturing divisions cover all types of motors, with products across 34 major series, more than 1,800 varieties, and over 19,500 specifications. Our output capacity spans a wide power range from 0.35kW all the way up to 25,000 kW. Our primary product families include:
For ball mills, SAG mills, and heavy crushers, our TDMK and YRKK wound-rotor motors provide the high starting torque required to launch heavy loads under direct-on-line conditions without drawing excessive line current.
Operating in explosive atmospheres requires extreme safety measures. Our YBX4 and YBX5 explosion-proof motors prevent gas ignition while maintaining power capacities up to several megawatts, ensuring safe operation in hazardous locations.
Large drainage pumps, axial flow pumps, and municipal water works rely on our YXKS water-to-air cooled (TEWAC) motors. This cooling setup isolates electrical parts from humid and dust-filled environments, providing long and reliable runtimes.
SIMO electric motors are certified by leading global bodies, ensuring conformity and safety across borders.
SIMO passed ISO9001 Quality System Certification, EU "CE", US "UL", Russian "GOST", and other major standards. Our electric motors are widely applied in electricity, coal, petroleum, mining, metallurgy, railway, transportation, chemical industry, agriculture, water economy, aviation, navigation, and other high-tech sectors in China and abroad.
Essential technical information for procurement managers, electrical engineers, and project leads.
We utilize specialized outer corona protection (OCP) and corona grading tapes (CGT) made of semi-conductive and silicon-carbide materials. Combined with our deep-penetrating Vacuum Pressure Impregnation (VPI) process, this ensures that any air gaps in the winding structure are completely eliminated, preventing partial discharges.
For high-dust mining, we recommend a Totally Enclosed Air-to-Air Cooled (TEAAC / IC611) or Totally Enclosed Water-to-Air Cooled (TEWAC / IC81W) structure. This isolates the internal stator wind path from the external abrasive dust, preserving insulation life.
Yes. Our YVFE3 and YVFE4 series high-voltage motors are custom-engineered for VFD control. They feature reinforced slot insulation and insulated non-drive end bearings to prevent damage from common-mode shaft currents.
For large motors like the TDMK series, alignment tolerances must be within 0.03 mm for both radial runout and axial clearance. We provide full laser alignment support instructions and specialized leveling mounting bases.
Our designs are tested and verified by international third-party certification bodies. We follow strict IEC guidelines for electrical safety clearances, flameproof enclosures, and load-loss calculations, ensuring smooth compliance approvals at the installation site.
Because of our integrated supply chain in Xi'an, we can design, manufacture, test, and ship custom motors within 12 to 16 weeks, depending on frame size and specific certification requirements.
Explore our high-efficiency low-voltage induction motors, DC motors, and explosion-proof models built for chemical and underground coal operations.
Lite Simo