Discover our primary heavy-duty electric motor classes engineered to handle critical operations in extreme and hazardous environments.
Discount YR/YRQ series high voltage three phase asynchronous motor Manufacturer, Suppliers
Custom Z series medium size DC motor Manufacturer, Suppliers
Discount T Series Large Size Three-phase Synchronous Motor Suppliers, industrial
Custom High voltage soft start state cabinet Manufacturer, Suppliers
OEM YKK 6kV 10kV series High Voltage three-phase induction motor Supplier, industrial
OEM Z4 series DC motor Manufacturers, Factories
OEM YBX4 Series Three-phase Asynchronous Ex motors used in hazardous area Company, electric
China YFB4 series Dust explosion-proof three-phase asynchronous motor Suppliers, Factories
In the context of the global transition to clean energy, high reliability, and strict safety protocols, the design of electrical machinery has experienced a paradigm shift. This evolution is particularly visible in explosion-proof environments where standard motors fail to meet compliance and safety benchmarks.
Electric motors designed for explosive gas atmospheres are generally classified based on their protection method. Among these, the "Ex e" (Increased Safety) and "Ex d" (Flameproof) paradigms represent the twin pillars of hazardous location design. However, the custom Exe motor variant stands out for its proactive protection strategy. Unlike Ex d enclosures, which are built to withstand an internal explosion and prevent it from propagating to the external environment, Ex e motors are designed to prevent the occurrence of any sparks, arcs, or excessive hot spots on all internal and external components under both normal running and specified abnormal conditions.
This design philosophy demands precise electrical modeling, exceptionally high-quality insulation materials, and advanced thermal management. Modern Exe motors utilize reinforced insulation structures, robust frame configurations, and tighter clearances between stationary and rotating parts. Additionally, the application of Variable Frequency Drives (VFDs) to control Exe motors requires advanced filter topologies and dedicated winding configurations to prevent transient overvoltages and localized thermal spikes. The integration of VFD control with specialized motors, such as the YVFE3, YVFE4, and YVFE5 series, has revolutionized flow control in petrochemical and gas pipeline compression, combining process flexibility with absolute safety.
Founded originally in 1955, Xi’an Lite SIMO Motor Co., Ltd (known globally as SIMO) is a premier enterprise specializing in the manufacturing of large and medium-sized, high and low voltage AC/DC motors, synchronous motors, and explosion-proof motors. Representing a core pillar of the Chinese mechanical and electrical industry, SIMO has evolved into a comprehensive, high-tech manufacturing and service provider of motor design, mechanical processing, mold fabrication, assembly, and testing.
With more than 60 years of history, the company operates under a registered capital of 21.5 million RMB. Our production infrastructure consists of 3 dedicated manufacturing plants and 1 subsidiary factory, spanning a total asset value of 380 million RMB. Driven by innovation and absolute precision, the facility operates over 1,172 sets of advanced manufacturing and testing equipment, staffed by 1,200+ employees. Our technical core consists of 260+ qualified technical engineers, which includes 21 senior engineers and 15 expert engineers tasked with executing bespoke customizations for complex industrial applications.
SIMO Motor is established and led by the state government to build heavy manufacturing foundations.
Relocated to the newly constructed, specialized plant in Xi'an City, expanding capacity.
Officially renamed to Xi'an Motor Factory after executing a series of strategic acquisitions and integrations.
Successfully reformed from a state-owned factory into a highly flexible limited liability company.
SIMO Motor Group is established, encompassing 14 specialized subsidiaries for comprehensive component manufacturing.
Relocated to the High-Tech Industrial Zone, initializing operations in an advanced, modern manufacturing facility.
Transitioned and renamed to Tech Full Simo Motor, aligning with modern international corporate standards.
Continuing the legacy as one of the best large-scale motor manufacturers globally, pioneering smart and energy-efficient motor systems.
Our research and development and manufacturing capability covers all major industrial electrical machines. Product specifications span across 34 major series, including more than 1,800 varieties and 19,500 distinct configurations, ranging from 0.35 kW up to 25,000 kW in power capacity.
| Motor Series | Type / Description | Voltage / Configuration | Primary Industrial Applications |
|---|---|---|---|
| YX / YXKK / YXKS | High Voltage, High-Efficiency Three-Phase Asynchronous | 6kV, 10kV / Air-Air, Water-Cooled | Heavy ventilation fans, industrial blowers, water pumps |
| YR / YRKK / YRKS | Wound Rotor High Voltage Asynchronous | High Voltage Slip-Ring Configurations | Cement ball mills, mine hoists, heavy-duty compressors |
| YE3 / YE4 / YE5 | High & Ultra-Premium Efficiency Asynchronous | Low Voltage (IE3, IE4, IE5 Standards) | General industrial machinery, conveying, pumps, systems |
| YVFE3 / YVFE4 / YVFE5 | Variable Frequency Speed Regulating AC Motors | Low and High Voltage, VFD Optimized | Automation lines, metallurgical equipment, variable flow pumps |
| YBX3 / YBX4 / YBX5 | Explosion-Proof Asynchronous Motors | Low/High Voltage (Ex d, Ex e, Ex t classifications) | Petroleum refineries, chemical plants, underground coal mines |
| T / TD / TK / TDMK | Large-Scale Industrial Synchronous Motors | High Torque, High Power Ratings | Large grinders, mining operations, high-capacity pumps |
| TFW | Large Size Synchronous Generators | 350 kW to 5,000 kW Power Output | Standby power systems, steam/gas turbine power gen |
| Z2 / Z4 / Z | Industrial DC Motors | Medium/Large Frame Size, Smooth Speed Control | Metal rolling mills, paper manufacturing, rubber extruders |
Our production facilities utilize modern machining, vacuum pressure impregnation (VPI) equipment, and precise balancing and testing labs to ensure zero-defect shipment of custom motor units.
Procurement teams managing multi-million dollar capital expenditure projects prioritize reliability, regulatory compliance, and system efficiency. SIMO motors are built to fit seamlessly into key international vertical markets.
Processing plants operate with continuous presence of explosive gases. Our YBX4 and YBX5 explosion-proof motors provide spark-free, high-efficiency operations for hydrogen compressors, heavy pumps, and cracking-unit ventilators.
Operating under abrasive coal dust and extreme vibration, heavy crushers, ball mills, and conveyor belts rely on wound rotor motors (YRKK) and heavy-duty synchronous motors (TDMK) to supply sustained mechanical energy.
Large municipal pumping stations and raw water pipelines require highly reliable high-voltage induction motors (YXKS / YKK series) with advanced liquid-to-air cooling options to guarantee uninterrupted daily operation.
Navigating regional electrical safety standards is critical for international project execution. SIMO motors are fully certified to comply with the most stringent global standards, providing plug-and-play reliability with localized engineering support.
To ensure global acceptance, SIMO has obtained certifications including ISO9001 Quality System Certification, the European Union's "CE", the United States' "UL", and the Russian "GOST" certificate. These certifications verify that our engineering, raw material verification, insulation winding, testing, and shipping processes comply with the corresponding international standards.
The industrial motor industry is transitioning towards smart, high-efficiency, and digitalized platforms. SIMO’s engineering roadmap is designed to address these trends through continuous R&D investments.
Global regulatory bodies are raising minimum energy performance standards (MEPS). SIMO is shifting production toward IE4 and IE5 (YE4 and YE5) motor topologies, reducing energy consumption and carbon emissions for large facilities.
We are integrating vibration and temperature sensors into custom explosion-proof and high-voltage machines. This allows real-time condition monitoring, helping operators transition from reactive to predictive maintenance.
Our research focuses on corona-resistant insulation systems, enabling our high-voltage motors to handle repetitive voltage surges from modern IGBT frequency converters without accelerated insulation degradation.
Find answers to common engineering questions regarding the selection, application, and compliance of high-voltage and explosion-proof motors.
Ex d (Flameproof) motors are designed with a heavy enclosure capable of containing an internal explosion without letting it escape to ignite the surrounding atmosphere. Conversely, Ex e (Increased Safety) motors focus on preventing an explosion from occurring by applying advanced design tolerances, superior insulation, and strict thermal limits, ensuring that no arcs, sparks, or hot surfaces form inside or outside the machine during normal or specified abnormal conditions.
Electric motors account for over 65% of the electrical energy consumed in heavy industry. Upgrading to IE5 efficiency levels (such as our YE5 series) reduces energy losses by up to 30% compared to standard IE3 motors. This leads to lower utility costs, reduced carbon footprint, and a shorter payback period, particularly in continuous 24/7 processes like mining, water supply, and refining.
Starting large high-voltage motors directly across the line (DOL) draws high inrush currents, causing thermal stress in the motor windings and voltage drops in the power grid. A high-voltage soft start state cabinet gradually ramps up the voltage, controlling the start-up current and torque. This reduces mechanical stress on coupling systems and gearboxes, preventing grid voltage drops and extending the service life of both the motor and driven equipment.
Yes, but they require specialized engineering. Operating a motor with a VFD can cause electrical stress in the windings and bearing currents. The motor must be designed to withstand high-frequency voltage spikes (using insulated bearings and corona-resistant insulation), and the cooling system must be sized for low-speed operations. Motors like our YVFE4 or YBX4/YBX5 series are designed to meet these requirements safely.
SIMO maintains an ISO9001 certified quality system. Our product lines hold regional safety certifications, including European Union CE, United States UL, Russian GOST, and international explosion-proof certifications such as ATEX and IECEx. This allows our products to meet strict technical specifications across European, American, Eurasian, and Asian markets.
Review our comprehensive low-voltage, variable-speed, and high-efficiency AC/DC motors designed for custom engineering integrations.
Discount Y series high voltage three phase asynchronous motor Manufacturer, industrial
China YVFE3 Series Variable Frequency Drive Three-phase Asynchronous Motor Suppliers, Factories
China Y2 series compact structure high voltage AC motor Manufacturers, Factory
High-Quality YE4 IE4 Three Phase Low Voltage Induction Motors Suppliers, industrial
OEM YBX3 Three-phase low-voltage high-efficiency explosion-proof motor Factory, electric
China YJP series variable frequency speed regulating AC high efficiency motor Manufacturers, Suppliers
Discount YE5 IE5 Three Phase Ultra Premium Efficiency Motors Manufacturers, Factory
China Z2 series DC motor Suppliers, Company
Lite Simo