TBFVF Series Explosion-Proof Variable Frequency Permanent Magnet Type Motor

TBFVF Series Explosion-Proof Variable Frequency Permanent Magnet Type Motor

The TBFVF Series is engineered for explosive and hazardous environments, utilizing the advanced flame-proof con-struction which ensures the reliable explosion protection and the high safety standards. While retaining the advantages of the permanent magnet synchronous technology at high-efficiency, this series incorporates the specialized structural design and the material selection to guarantee safe and stable operation in atmospheres containing explosive gases and combustible dust. It is the ideal choice for energy-saving retrofits and new equipment installations in hazardous locations

The TBFVF Series is a high-efficiency, explosion-proof motor designed specifically for hazardous and potentially explosive atmospheres. It combines the high efficiency of permanent magnet synchronous technology with the safety and reliability of a flameproof enclosure, making it ideally suited for variable speed drive applications in sectors such as petroleum, chemical, and coal mining.

Key Features

The TBFVF Series flameproof permanent magnet synchronous motor employs a robust explosion-proof design, achieving safety ratings of Ex d IIC T4 Gb / Ex tD A21 IP66 T135°C. It is suitable for a wide range of hazardous locations, including explosive gas atmospheres (Groups IIA, IIB, IIC) and combustible dust environments (Zones 21, 22). With a rated power range of 5.5–450 kW and support for voltages including 380V, 660V, and 1140V, this motor delivers the high-efficiency benefits of permanent magnet technology. Its specialized construction and material selection ensure reliable explosion protection. Coupled with an optimized electromagnetic design and an independent cooling system, it maintains stable performance across a wide frequency range, making it an ideal choice for energy-saving retrofits and new installations in hazardous areas.
High-Level Explosion Safety:​ Meets the stringent Ex d IIC T4 Gb / Ex tD A21 explosion-proof standards. The reliable flameproof structure features precision-machined joints to ensure safe operation in explosive atmospheres.
High Efficiency & Energy Savings:​ Utilizes permanent magnet synchronous technology to achieve IE4 or higher efficiency levels, maintaining over 95% efficiency across a wide frequency range. It delivers 20%–30% energy savings compared to traditional explosion-proof motors.
Stable Wide-Frequency Operation:​ Supports wide frequency speed regulation from 5 to 100 Hz. It offers smooth low-speed operation, high starting torque, and fast dynamic response to adapt to various working conditions.
Intelligent Drive Compatibility:​ Provides excellent compatibility with mainstream explosion-proof variable frequency drives (VFDs), supports multiple control modes, and enables straightforward system integration for remote monitoring and intelligent speed control.
Reliability & Durability:​ Features a Class H insulation system and specialized inverter-duty bearing protection to effectively suppress shaft currents, ensuring long-term stable operation under VFD conditions and extending service life.

Technical Specifications

Power Range:​ The TBFVF Series covers a rated power range from 5.5 kW to 450 kW. Its flexible power configurations cater to various drive requirements, from small to medium-sized equipment up to large-scale industrial installations, making it suitable for energy-saving retrofits and new projects in diverse hazardous locations.
Rated Voltage:​ Compatible with multiple industrial voltage levels including 380V, 660V, and 1140V. This aligns with mainstream industrial grid standards domestically and internationally, facilitating equipment matching and system integration while reducing retrofit costs. It is particularly well-suited for applications in industries such as petrochemical and mining.
Efficiency Class:​ Utilizing permanent magnet synchronous technology, these motors achieve high-efficiency class IE4 (capable of reaching IE5). They maintain efficiency above 95% across a wide frequency range, delivering 20%-30% energy savings compared to traditional explosion-proof asynchronous motors. This significantly reduces long-term operational energy consumption.
Power Factor:​ With a power factor ranging from 0.95 to 1.0, this near-unity power factor greatly reduces reactive power losses, alleviates grid burden, improves power supply quality, and minimizes line losses. It is especially beneficial for applications with long-distance power supply, such as in mining and petrochemical plants.
Protection Level:​ Designed with an IP66 protection rating, its totally enclosed structure effectively resists dust and water ingress. This ensures long-term, reliable operation in harsh industrial environments characterized by moisture and dust, meeting the stringent requirements of hazardous locations.

Successful Stories

Motor Selection Guide and FAQ

Motor Selection Guide
1. Define Basic Parameters
Power & Speed:​ 
Determine the required rated power based on load characteristics and define the motor pole count and speed range according to your equipment’s operational speed.
Voltage & Frequency:​
Confirm your power supply standard (e.g., 380V/50Hz, 480V/60Hz). Custom designs are available for special voltage requirements.
Mounting Type:​
Specify IEC standard mounting (e.g., B3, B5, B14). Custom the flanges & bases are also supported.
2. Consider Operating Environment
Protection Rating (IP):​
IP55 for standard environments. IP65 is recommended for damp or dusty conditions. Hazardous areas require Ex D/Ex E certifications.
Insulation Class:​
Class F (155°C) for general use. Class H (180°C) insulation is advised for high-temperature environments.
Cooling Method:​
Self-ventilated (IC411) for standard applications. Forced air or water cooling is available for enclosed spaces or high-power-density scenarios.
3. Match Load Characteristics
Starting Torque:​
Consider starting torque for fan/pump loads. Verify locked-rotor torque for conveying equipment.
Duty Cycle:​
Standard motors are suitable for continuous operation (S1). Frequent start-stop cycles (S5) require reinforced bearings and insulation.
Efficiency Requirement:​
Select IE3/IE4/IE5 efficiency classes based on annual operating hours. Ultra-premium efficiency (IE5) motors offer the lowest total cost of ownership for long-running applications.
Get Your Custom Solution & Fast Quote. Our Engineers Are Ready to Help.
Contact Us for the Precise Solution
Provide your equipment parameters, load profile, environmental conditions, and application details.
Receive the complimentary motor selection calculation, the energy efficiency analysis report, and the 3D model.
We support sample testing and operational simulation for validation.

Scroll to Top