Our high-voltage explosion-proof motor is an upgraded version of the YB3 series-we've tweaked it to be more efficient and user-friendly! It cuts down on energy waste, has a compact design that saves space, and is lighter to handle, all while meeting top energy-saving standards. Plus, it's fully explosion-proof (certified with ExdbIIBT4 Gb) for safe use in risky environments. We've also added a dual cooling system: internal and external air paths work together to keep things cool evenly. The motor's frame has built-in cooling fins, and there's an internal fan to manage heat from the stator and rotor-so it runs reliably even during long hours of use.
Explosion-proof marking: ExdbIMb, ExdbIIAT4Gb, ExdbIIBT4Gb. It can also be made into ExdbIICT4Cb (sliding bearings are not allowed to be made into ExdbIICT4Gb).
This motor works in continuous operation mode (that's S1 rated) and stays reliable even in tough conditions-it handles temperatures from -15℃ to 40℃ and works perfectly at altitudes up to 1000 meters. Key specs you'll care about: 6kV/10KV rated voltage(other for customization), power up to 1600kW, F-class thermal resistance (handles 155℃), IP54 protection (keeps dust and water out), and IMB3 installation (easy to set up). It's a go-to for industries like petroleum, chemical, coal, and power-ideal for driving fans, pumps, compressors, and crushers in explosive gas environments. Plus, it runs with low vibration and lasts for years, so you won't have to worry about frequent replacements. And here are some detailed introduction for its structure and advantages.
1.Low noise and vibration
1.1For the noise
The combination of refined rotor dynamics design, innovative manufacturing processes and high-precision dynamic balancing ensures significantly reduced vibration levels in the electric motor. Not only does the high-voltage explosion-proof motor meet the vibration requirements of GB10068 standards, but in most applications it substantially exceeds these specifications.
1.2For the vibration
The optimised airflow design hinges upon selecting the correct fan type. Given the low external airflow resistance in the IC411 cooling method for electric motors, the airflow between the heat dissipation fins on the frame primarily follows an axial direction. Consequently, the fan and fan cover are designed with optimal streamlined contours.
1.2.1External fan
All external fans for 2-pole motors are axial fans, suitable for rotation in one direction only. The fan blade material complies with GB3836, possessing sufficient resistance to ageing and corrosion.
Motors with centre heights of H355 to H400 and 4 poles or above utilise bowl-type centrifugal fans, capable of bidirectional rotation. Fans are either cast from aluminium alloy ZL102 or fabricated from welded steel plates (see Figure 3).
Four-pole motors with centre heights of H450 and above employ backward-curved centrifugal fans, suitable for rotation in one direction only. These fans are fabricated from welded steel plate components. High-voltage explosion-proof motor with other pole numbers utilise bowl-type centrifugal fans, capable of bidirectional rotation. These fans are either cast from aluminium alloy ZL102 or fabricated from welded steel plate (see Figure 3).
1.2.2Internal fan
All internal fans within the electric motors are cast from aluminium alloy ZL102 as bidirectional centrifugal fans (see Figure 4). This eliminates the need to dismantle the motor and replace the internal fan when adjusting the rotation direction, as required with conventional two-pole motors. Should a two-pole motor require reverse rotation, simply replacing the external fan suffices.
The fan cover has been designed with vibration reduction and noise suppression features, and it also has strong impact resistance. To reduce the noise of the motor, sound-absorbing and noise-suppressing accessories are installed on the motor fan cover. The base and end cover are made of high-damping cast iron, and the selection of appropriate stator and rotor slots also enables the motor to have a lower noise level.
2.Frame and end cover structure
The high-voltage explosion-proof motor, the base and the end cover are made of cast iron with a process maturity and a grade of HT250 or above. The center height of each motor corresponds to a specific base and is equipped with a cast integral foundation. Through optimized design, the base has extremely high strength and stiffness. The base is a horizontal and vertical full-heat-sink cast iron base, with four axial ventilation channels inside. The end space of the winding in the base is distributed with axial parallel heat dissipation ribs. This increases the heat dissipation area. The junction box is located above the ventilation channel on the motor side. Two adjustable-angle hanging rings are placed diagonally on the ventilation channel to facilitate the lifting of the motor. The end covers of the driving and non-driving ends have the same structure, with heat dissipation ribs both inside and outside, which improves the stiffness and heat dissipation effect of the end cover (see Figure 5).
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