3-phase gear motors over 3.7kW are the combination of a 3-phase electric motor and a gearbox. This combination creates a drive system capable of reducing rotational speed and increasing torque, meeting the demands of various industrial applications. These gear motors play a crucial role in mechanical power transmission, helping machinery operate stably and efficiently.

Advantages of 3-Phase Gear Motors over 3.7kW

• Powerful capacity: Gear motors from 3.7kW and above meet heavy-duty production demands.
• Stable and durable operation: Sturdy design, capable of withstanding high work intensities.
• High efficiency, energy saving: The motor operates continuously with optimal efficiency, reducing power consumption.
• Diverse applications: Can be integrated into various industrial systems.

Applications of 3-Phase Gear Motors over 3.7kW

• Industrial conveyor systems: Used in conveyors for transporting large quantities of goods and materials in factories and warehouses. The motor provides strong traction, helping the system operate stably, limiting load slippage, and ensuring production schedules.
• Large-capacity agitators and mixers: Suitable for the food, chemical, and wastewater treatment industries, where strong stirring force and stable speed maintenance over long periods are required. The motor helps the mixing process occur evenly, enhancing quality and operational efficiency.
• Heavy-load lifting equipment: Installed for overhead cranes, gantry cranes, and industrial elevators. Thanks to high load capacity and durable operation, the motor supports precise motion control, ensuring safety during lifting operations.
• Automated production lines: Supports the operation of presses, stamping machines, crushers, and steel rolling mills in large-scale production lines. The motor helps the system operate continuously, withstand heavy loads, and well meet precise stop-start requirements.

Prices for 3-Phase Gear Motors over 3.7kW at Thanh Thai Motor

Frequently Asked Questions

Why do gear motors over 3.7kW easily experience broken shafts or chipped gearbox teeth when starting under heavy loads?

Because large-capacity motors when started directly generate a sudden maximum torque. This jerk force impacts the stationary gear system, creating an enormous mechanical shock that easily causes overload, breaking the output shaft or chipping the gear teeth. To handle this, the system must use a Variable Frequency Drive or soft starter to allow the motor to accelerate gradually, protecting the gearbox.

How to wire a large gear motor over 3.7kW for the 3-phase power grid in Vietnam?

With a 380V/660V rating label, you must wire it in a Delta (Δ) configuration so that the motor runs at the rated 380V voltage in Vietnam and achieves sufficient pulling power. If you mistakenly wire it in a Star (Y) configuration, the motor will suffer from under-voltage (running at only about 58% capacity), leading to weak load capacity, overheating, and winding burnout when pulling heavy conveyors or thick agitators.

What should be noted in the maintenance and periodic oil change process for this large-capacity gear reducer?

For units over 3.7kW operating continuously, you need to change the oil for the first time after the initial 500 running hours to flush out metal shavings generated by new gears friction. Subsequent oil changes should be performed periodically every 2,500 – 5,000 running hours (or 6 months). You must use the correct type and viscosity of industrial gear oil specified by the manufacturer, and absolutely avoid using standard grease.