Explore our leading low-voltage, high-efficiency, and explosion-protected asynchronous driving systems.
In hazardous industrial environments where flammable gases, vapors, or combustible dusts represent permanent operating threats, flameproof electric machinery serves as the cornerstone of plant safety and operational continuity. Under directives set by standardizing bodies worldwide (including ATEX, IECEx, and NEC rules), a flameproof enclosure (designated as "Ex d" or "Ex t") does not prevent an internal explosion from occurring. Instead, it guarantees that any internal detonation will be securely contained within the structural casing, preventing fire propagation to the surrounding atmosphere.
For decades, industrial operations in petrochemical extraction, deep-shaft coal mining, heavy metal processing, and specialized chemical syntheses have relied on three-phase induction motor topologies. These systems combine high mechanical reliability with simplified maintenance protocols and outstanding electrical efficiency. As an industry leader, Xi'an Lite SIMO Motor Co., Ltd. (LITESIMO) has continuously pushed the frontiers of motor insulation integrity, housing structural resilience, and energy conversion efficiency to provide the global market with premium-grade flameproof systems tailored for the most grueling environments.
Selecting a safety-rated motor requires distinguishing between environments threatened by gaseous hazards and those endangered by dense particulate matter:
Under IEC 60079-1, Ex d motors feature explosion-proof mating paths (joint clearances). If gas permeates the motor housing and is ignited by electrical arcing, the escaping gases are forced to traverse threaded or flanged joints (flame paths). As the hot gases escape, their energy is dissipated, cooling them below the ignition threshold of the external atmosphere. Simo Motor's YBX3, YBX4, and YBX5 Series represent the peak of this design paradigm, meeting stringent gas group standards (IIA, IIB, IIC) and temperature classes (typically T4 to T6).
Governed by IEC 60079-31, dust explosion-proof models (such as Simo’s YFB3 Series) focus on preventing dust ingress. Combustible dust layers on hot surfaces can insulate the motor and ignite. Therefore, Ex t designs utilize ultra-high ingress protection (IP65/IP66) and precise outer shell thermal regulation to ensure that external dust blankets cannot contact live electrical components or reach auto-ignition temperatures.
Originally founded in 1955 under state oversight, Xi’an Lite SIMO Motor Co., Ltd. has developed into a top-tier designer and manufacturer within the Chinese mechanical industry. Over more than 60 years of growth, the company has consolidated 3 specialized manufacturing factories and one subsidiary, supported by 1,172 sets of advanced manufacturing and test systems.
Today, LITESIMO maintains a registered capital of 21.5 million RMB. Our workforce of 1,200+ employees includes more than 260 technical engineers, 21 senior engineers, and 15 senior expert engineers. This talent pool drives continuous advancements in high-voltage AC motors, DC motors, and flameproof induction systems. Our catalog spans 34 major series, 1,800 varieties, and over 19,500 specifications, covering a power spectrum from 0.35 kW to 25,000 kW.
Integrating Variable Frequency Drives (VFDs) with induction motors is a standard approach for modern energy conservation. However, in hazardous zones, using a VFD introduces specific challenges that require careful engineering:
By combining these design features, Simo Motor's YBBP low-voltage explosion-proof variable-frequency three-phase motors protect installations while optimizing energy use.
Our manufacturing processes rely on advanced equipment to ensure precise tolerances, balanced rotors, and gas-tight flameproof joints:
Industrial safety products require rigorous validation to ensure international compliance. Every flameproof motor produced at our Xi'an facilities undergoes strict quality checks before shipping. Simo Motor has passed ISO9001 Quality System Certification, European Union "CE" certification, United States "UL" standards, Russian "GOST", and CQST (China National Quality Supervision and Test Center for Explosion Protected Electrical Products).
These certifications allow our motor systems to operate worldwide, helping customers meet national safety regulations in diverse regions.
SIMO designs systems customized to the demands of specific industries:
The motor industry is transitioning toward higher efficiency classes under IEC standards. Operating high-efficiency motors lowers utility bills and reduces running temperatures. Because flameproof motors must regulate surface heat in explosive environments, cooler operation directly enhances plant safety.
By developing the YBX5 premium efficiency series, SIMO has integrated IE5-compliant induction motors into hazardous-area applications. Moving from IE3 to IE5 design standards requires premium silicon steels, optimized stator slot designs, and refined winding techniques. These elements reduce electrical losses by up to 30%, lowering total cost of ownership and reducing carbon emissions in heavy industrial plants.
Complete your facility's machinery framework with our heavy-duty and synchronous motor designs.
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