High Voltage AC Motor Manufacturer
High Voltage AC Motors are designed for large industrial equipment requiring high output power, reliable continuous operation, and efficient transmission of mechanical energy. Compared with low-voltage motors, high-voltage motors can transmit greater power at lower current levels, helping reduce conductor size, electrical losses, and power-distribution requirements in medium- and large-scale industrial installations.
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Product Specifications
Our High Voltage AC Motors are available in a wide range of configurations to satisfy different electrical systems, mechanical loads, and industrial operating conditions.
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Item |
Description |
|
Product Category |
High Voltage AC Motor |
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Motor Type |
Three-Phase High-Voltage Asynchronous Motor |
|
Rotor Type |
Squirrel-Cage or Wound-Rotor |
|
Rated Voltage |
Commonly 3kV, 6kV, 6.6kV, 10kV and 11kV |
|
Rated Frequency |
50Hz / 60Hz |
|
Output Power |
Project-dependent high-power range |
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Pole Options |
2, 4, 6, 8, 10, 12 poles and customized options |
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Cooling Method |
IC01, IC611, IC616, IC81W and project-specific configurations |
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Protection Class |
IP23, IP44, IP54, IP55 and optional designs |
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Insulation Class |
Class F or Class H |
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Duty Type |
S1 continuous duty and other duty types upon request |
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Mounting Type |
B3 and customized horizontal or vertical arrangements |
Product Types
Our High Voltage AC Motor product range includes different motor structures designed for varied industrial operating requirements.
High-Voltage Squirrel-Cage Asynchronous Motors: High-voltage squirrel-cage motors are widely used in large industrial equipment because of their simple rotor structure, dependable operation, and relatively low maintenance requirements.
High-Voltage Wound-Rotor Motors: Wound-rotor motors use rotor windings connected through slip rings, allowing external resistance or control equipment to influence starting characteristics. They are commonly selected for applications requiring high starting torque, controlled acceleration, or reduced starting current.
High-Voltage Variable-Speed Motors: High-voltage variable-speed motors are designed for operation with medium-voltage frequency converters. They allow motor speed and output to be adjusted according to actual process demand, improving process control and energy utilization in suitable applications.
Open-Ventilated High-Voltage Motors: Motors with IC01 cooling and IP23 protection use open ventilation to circulate ambient air through or around the motor structure. This arrangement can provide effective cooling and compact construction where the installation environment is clean and adequately ventilated.
Enclosed High-Voltage Motors: Enclosed motors with IP54, IP55, or similar protection levels are designed for environments containing dust, moisture, or airborne contaminants. Cooling may be achieved through air-to-air or air-to-water heat exchangers, depending on the motor power and operating conditions.
Performance
High Voltage AC Motors are designed for stable operation under heavy electrical and mechanical loads. Their performance is evaluated not only by rated power and efficiency, but also by starting capability, torque characteristics, thermal performance, vibration, insulation reliability, and compatibility with the driven equipment.
Squirrel-cage motors provide dependable operation and low routine maintenance for applications with suitable grid capacity and starting conditions. Wound-rotor motors provide greater flexibility in applications requiring high starting torque or controlled acceleration.
Variable-speed high-voltage motors allow operating speed to be adjusted according to process demand. When properly matched with a frequency converter, they can reduce mechanical shock, improve production control, and lower energy consumption in variable-load applications.
Optimized ventilation and cooling structures help control temperature rise during continuous operation. Appropriate bearing selection, lubrication systems, and shaft design support reliable service under radial, axial, and dynamic loads.
Low vibration and accurate rotor balance reduce stress on bearings, foundations, couplings, and connected machinery. This contributes to longer equipment life, lower maintenance requirements, and improved operational stability.
Applications
High Voltage AC Motors are widely used in industries where large mechanical loads, continuous production, and reliable power transmission are essential. Their high output capacity makes them particularly suitable for centralized industrial plants, heavy machinery, and energy-intensive processes.
In power generation and utility systems, high-voltage motors are used to drive boiler-feed pumps, circulating-water pumps, induced-draft fans, forced-draft fans, cooling-water systems, and auxiliary equipment. Reliable continuous operation is especially important in these applications because motor failure can affect the performance of an entire plant.
In mining and mineral-processing operations, these motors are installed on crushers, grinding mills, conveyors, ventilation fans, pumps, hoists, and material-handling systems. Wound-rotor motors may be selected where high starting torque is required, while squirrel-cage motors are widely used for stable continuous-duty equipment.
Metallurgy and steel plants use high-voltage motors for rolling mills, blowers, pumps, fans, compressors, conveyors, and production-line machinery. Motors can be designed according to heavy load, frequent operation, vibration, dust, high ambient temperature, and process-specific duty requirements.
Cement plants apply high-voltage motors to raw mills, cement mills, crushers, kiln fans, induced-draft fans, conveyors, and large pumps. Suitable enclosure and cooling arrangements help maintain reliable operation in dusty production environments.
In the petrochemical, chemical, and oil and gas industries, high-voltage motors drive compressors, process pumps, blowers, cooling systems, and pipeline equipment. Project requirements may include special insulation, higher protection levels, controlled starting, monitoring devices, and documentation for engineering approval.
High-voltage motors are also used in water conservancy, municipal water supply, wastewater treatment, paper production, marine systems, large HVAC installations, test benches, wind tunnels, and other industrial infrastructure projects.
For energy-saving upgrades, variable-speed high-voltage motors can be combined with medium-voltage drives to adjust the output of pumps, fans, and compressors according to actual demand. This helps reduce unnecessary energy consumption and improve process flexibility.
Engineering and Motor Selection
Correct motor selection is essential for ensuring safe startup, stable operation, and long service life. High-voltage motor selection should consider more than rated power alone.
Important information includes the driven equipment type, load torque curve, rotational inertia, required starting torque, permitted starting current, number of starts per hour, acceleration time, rated voltage, frequency, pole number, operating speed, duty cycle, ambient temperature, altitude, cooling-water conditions, installation location, and foundation dimensions.
Manufacturing Process
The manufacturing process begins with technical review and confirmation of the motor data sheet, electrical parameters, mechanical dimensions, cooling structure, accessories, and inspection requirements.
Electrical steel, copper conductors, insulation materials, shafts, bearings, frames, coolers, and other critical materials are inspected before production. Material selection is controlled according to the approved technical documents and manufacturing standards.
Stator cores are manufactured from precision-stamped electrical steel laminations. High-voltage coils are formed, insulated, installed, connected, and impregnated according to the required voltage class and insulation system.
Rotor manufacturing varies according to the motor type. Squirrel-cage rotors are produced with appropriate conductor and end-ring structures, while wound rotors require insulated rotor windings, slip rings, and related connection components.
Machining processes control shaft dimensions, bearing seats, frame interfaces, end shields, terminal-box surfaces, and mounting dimensions. Rotors are dynamically balanced to reduce vibration during operation.
After stator, rotor, bearings, cooling system, and terminal components are assembled, the motor undergoes electrical and mechanical inspection. Monitoring devices and auxiliary systems are installed and tested according to the project configuration.
The finished motor is then subjected to factory tests, final dimensional inspection, painting, nameplate installation, documentation preparation, and export packaging.
Quality Control
Quality control is carried out at every stage-from design review and material procurement to manufacturing, assembly, testing, and shipment.
Incoming Inspection: Critical materials and components, including copper conductors, insulation materials, electrical steel, bearings, sensors, heaters, fans, coolers, and terminal-box parts, are verified before production.
Stator & Rotor Manufacturing: Stator inspection covers lamination quality, coil dimensions, insulation wrapping, slot installation, connection accuracy, impregnation, and curing. Rotor inspection includes conductor structure, shaft machining, slip-ring assembly, and dynamic balancing.
Mechanical Inspection: Key items checked include shaft runout, bearing clearances, air gap, mounting dimensions, coupling interfaces, fastener torque, cooling system, and overall assembly quality.
Electrical Testing: Tests may include winding resistance, insulation resistance, polarization index, dielectric withstand, interturn testing, no-load current/loss, phase balance, rotation direction, and temperature-sensor verification.
Performance Testing (as required): Depending on project specifications, the motor may also undergo load testing, efficiency testing, temperature-rise testing, vibration and noise measurement, overspeed, locked-rotor, starting performance, and variable-frequency operation tests.
Documentation: Test reports, dimensional records, inspection certificates, material documents, and production traceability files can be provided as per contract and technical agreement.
Company strength
Factory) was established in 1955 and is a leading enterprise in China's mechanical industry. It specializes in the research and production of large and medium-sized high and low voltage AC/DC motors, high-efficiency motors, and automation equipment systems. The company provides customized power equipment solutions that comply with GOST certification standards for the Russian industrial sector. These solutions are widely used in key industries such as power grid modernization, mining, metallurgy, and petrochemicals, helping to update local infrastructure and promote industrial development.The company has over 20 experienced senior engineers who can provide customers with a complete development cycle and customized solutions.Furthermore, our state-owned laboratory has been certified by the Chinese National Accreditation System (CNAS), and possesses multiple international certifications including ISO 9001 (the three major systems), GOST, CE, EAC, CCC and AAR (American Railway Association) quality management systems. The product quality is high and the operation is reliable.
Packaging & Delivery
High-voltage motors require strong export packaging due to their size, weight, precision components, and long-distance transport requirements.
Preparation Before Packaging
Each motor is inspected, cleaned, and treated with moisture and corrosion protection. Shaft extensions, flanges, terminal boxes, cooling components, instruments, and exposed interfaces are covered or secured to prevent damage during handling.
Packaging Method
Medium and large motors are typically fixed to reinforced wooden bases or steel-supported skids and enclosed in heavy-duty export wooden cases. Internal bracing limits movement, while moisture barriers, desiccants, protective films, and anti-corrosion materials are applied for sea transport or long-term storage.
Shipping Options
We support sea freight, railway transport, road transport, and multimodal logistics based on motor dimensions, weight, destination, and project schedule.
Trade Terms & Logistics Support
We offer flexible trade terms including EXW, FOB, CFR, CIF, and other agreed Incoterms. Our logistics team assists with packing dimensions, gross weight, loading plans, shipping documents, and export coordination.
Certifications
Our manufacturing facilities operate under internationally recognized quality management systems and comply with applicable international standards for industrial motor manufacturing.
Available certifications and supporting documents include:
ISO 9001 Quality Management System
ISO 14001 Environmental Management System
ISO 45001 Occupational Health and Safety Management System
CE Certification
GOST Certification
EAC Conformity Certificate
FAQ
As one of the most professional high voltage ac motor manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy durable high voltage ac motor in stock here from our factory. Also, custom service is available.
