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3 kW 1000 RPM Electric Motor – Technical Description

A 3 kW 1000 RPM electric motor is a low-speed, high-torque three-phase induction motor designed for industrial applications that require stable operation, continuous duty, and reliable performance under load. With its reduced rotational speed, this motor is especially suitable for systems where torque and smooth power transmission are more critical than high speed.

General Technical Characteristics

  • Rated Power: 3 kW

  • Rated Speed: 1000 RPM (6-pole design)

  • Power Supply: Three-phase AC (typically 380–415 V, 50 Hz)

  • Duty Class: S1 – Continuous operation

  • Insulation Class: F (Class H optional)

  • Protection Class: IP55 (higher protection available upon request)

  • Cooling Method: IC411 – Totally Enclosed Fan Cooled (TEFC)

Performance and Efficiency

The 1000 RPM design allows the motor to deliver higher torque compared to standard 1500 or 3000 RPM motors of the same power rating. This makes it ideal for direct-drive systems, reducing the need for gearboxes and minimizing mechanical losses. Depending on the efficiency class (IE2, IE3, IE4), the motor ensures low energy consumption and stable efficiency under variable load conditions.

Mechanical and Electrical Design

The motor features a robust cast iron or aluminum housing, precision-balanced rotor, and high-quality copper windings. These design elements provide low vibration, reduced noise levels, and long bearing life, even in demanding industrial environments. Advanced insulation systems protect the windings against thermal stress and voltage fluctuations.

Applications

A 3 kW 1000 RPM electric motor is widely used in:

  • Conveyors and belt systems

  • Gear-driven machinery

  • Crushers and material handling equipment

  • Mixers and agitators

  • Pumps and industrial fans requiring high torque at low speed

Reliability and Maintenance

Designed for continuous industrial use, this motor offers high operational reliability with minimal maintenance requirements. Efficient cooling and reduced operating temperature extend service intervals and overall motor lifespan.

Conclusion

The 3 kW 1000 RPM electric motor is an excellent choice for applications demanding low speed, high torque, durability, and energy-efficient operation. Its robust construction and stable performance make it a dependable solution for a wide range of industrial processes.