4KW 2-Pole Three-Phase Induction Motor Introduction

This 4KW three-phase induction motor is a high-efficiency heavy-duty industrial drive unit, featuring a 2-pole configuration and a rated speed of 2800 RPM—closely approaching the 3000 RPM synchronous speed under 50Hz three-phase alternating current (AC) power supply. Its core operation adheres to the principle of electromagnetic induction: when three-phase AC is supplied to the stator windings, a uniform rotating magnetic field (RMF) is generated, with rotational speed inversely proportional to the number of pole pairs. The RMF cuts the rotor conductors, inducing electromotive force (EMF) and eddy currents, and the interaction between these induced currents and the RMF produces stable electromagnetic torque, driving the rotor to rotate asynchronously with a low slip ratio (3%-5% at rated load), ensuring efficient and continuous power transmission.

Structurally engineered for durability and performance, the motor adopts a rugged cast-iron frame with IP54 protection class, providing excellent mechanical rigidity, dustproof, and waterproof capabilities to adapt to harsh industrial environments such as workshops, construction sites, and fluid processing facilities. The stator is equipped with high-purity oxygen-free copper windings encapsulated in Class F insulation material, boasting a thermal endurance temperature of 155℃, which minimizes copper loss and prevents insulation breakdown due to overheating. The 2-pole rotor features a die-cast aluminum squirrel-cage structure, ensuring high mechanical strength, low rotational inertia, and minimal maintenance needs, paired with precision sealed deep-groove ball bearings lubricated by high-temperature lithium-based grease to reduce frictional loss and ensure smooth long-term operation.

Key performance parameters are meticulously calibrated for industrial applicability: rated voltage 380V (50Hz), rated current approximately 8.2A, and a rated power factor of ≥0.89. It delivers a starting torque of 1.8 times the rated torque for reliable startup under medium loads, with a maximum torque of 2.2 times the rated torque to cope with occasional load fluctuations. Compliant with IE2/IE3 energy efficiency standards, it minimizes energy consumption, with noise emission controlled at ≤77dB at 1m. Widely used in mechanical processing, HVAC systems, centrifugal pumps, and air compressors, it supports both horizontal and vertical mounting. Regular insulation testing (≥2MΩ at 500V DC) and bearing lubrication extend its service life, making it a cost-effective and reliable drive solution for diverse industrial scenarios.