3-Phase Electric Motors Under 3.7kW are small-capacity industrial electric motors that use a 3-phase 380V power supply, suitable for factories and workshops with pre-existing industrial electrical systems. Thanks to their stable operation, uniform torque, and low power consumption, these 3-phase motors are widely favored in automation and light mechanical applications.
3-Phase Electric Motor 1.5kW 2Hp at Thanh Thai Motor
Applications of 3-Phase Electric Motors Under 3.7kW
Water pump:3-phase electric motors are used to operate water pumps in domestic water supply systems, agricultural irrigation, and industrial wastewater pumping.
Industrial fan: Ventilation fans, dust collection fans, and cooling fans in factories and manufacturing workshops often use 3-phase electric motors to ensure stable and efficient operation.
Air compressor: 3-phase electric motors are used to drive air compressors in industries such as machinery, manufacturing, construction, and mining.
Conveyor: In conveyor systems of manufacturing plants and warehouses, 3-phase electric motors help transport goods continuously and efficiently.
Machine tools: Drilling machines, cutting machines, grinding machines, and lathes in mechanical workshops use 3-phase electric motors to generate the necessary movement for machining processes.
Applications of 3-Phase Electric Motors Under 3.7kW
Advantages of 3-Phase Electric Motors Under 3.7kW
High efficiency: 3-phase electric motors have a higher conversion efficiency of electrical energy into mechanical energy compared to 1-phase motors, helping save electricity and reduce operating costs.
Good load-bearing capacity: 3-phase electric motors have high load capacity, operating stably even when loads change abruptly, ensuring continuity in the production process.
Long lifespan: With a simple structure and quality materials, 3-phase electric motors offer a long service life with minimal failures, helping reduce maintenance and repair costs.
Smooth startup: 3-phase electric motors start smoothly, minimizing vibration and noise, creating a more comfortable and safer working environment.
Easy maintenance: The simple structure makes maintenance and repair of 3-phase electric motors easier, reducing equipment downtime.
Advantages of 3-Phase Electric Motors Under 3.7kW
3-Phase Electric Motor Prices Under 3.7kW
Thanh Thai Motor sends customers the reference price list for 3-phase electric motors under 3.7kW. We are committed to providing genuine, high-quality products at the most competitive prices in the market.
Notes When Buying 3-Phase Electric Motors Under 3.7kW
Determine frame size standards: Small-capacity motors have shaft dimensions and mounting hole center distances that vary greatly across different power ratings.
Check heat dissipation capability at low speeds: Small motors under 3.7kW are frequently connected to a variable frequency drive to reduce speed (running below 25Hz). Since the rear cooling fan is attached directly to the motor shaft, when the motor runs slowly, the fan rotates slowly as well, resulting in insufficient airflow and causing the motor to overheat and stall. If your application requires continuous slow operation, choose to purchase an additional forced cooling fan (an independently running auxiliary fan) installed at the rear end of the motor.
Consider housing material selection (aluminum or cast iron):
Aluminum housing: Very popular in the segment under 3.7kW thanks to its light weight, smooth and attractive surface, and fast heat dissipation, suitable for food processing machines, extraction fans, or tight installation spaces.
Cast iron housing: Heavier but withstands impacts, strong vibration environments, or heavy-duty outdoor applications (such as winches, wastewater pumps).
Select the appropriate number of motor poles: For the same power rating (e.g., 2.2kW), the number of poles (P) determines the pulling force of the machine.
To learn more practical information and real perspectives about the product, customers can visit the electric motor video section in the general video category produced by the Thanh Thai Motor team.
Frequently Asked Questions
Why do motors under 3.7kW when connected to a 3-phase 380V power grid in Vietnam easily burn out if wired in Delta (Δ) out of habit?
Because most motors under 3.7kW in Vietnam have voltage ratings of 220V/380V (Delta/Star label). This symbol means the motor can only withstand 380V when connected in Star (Y). If you wire it in Delta (Δ), the windings will experience overvoltage, leading to a sudden surge in current and burning out the motor within minutes.
Can a variable frequency drive be used to reduce the speed of small motors under 3.7kW down to 10 – 15 Hz for slow operation?
Yes, but continuous operation is not recommended. Because the cooling fan of small motors is attached to the main shaft. When the frequency is lowered, the motor rotates slowly, causing the fan to lack sufficient airflow for cooling, leading to heat buildup and motor burnout. If continuous slow operation is mandatory, you need to install an additional independent forced cooling fan at the rear end of the motor.
How to choose the correct frame code of a motor under 3.7kW when purchasing a replacement for an existing machine?
In the small capacity segment, motor dimensions vary significantly across different kW ratings. You must use calipers to accurately measure the shaft diameter and the distance between the base center holes (or flange diameter). Cross-reference these measurements with standard IEC catalogs to determine the exact frame code.
