5.5KW 6-Pole Three-Phase Induction Motor Introduction

This 5.5KW three-phase induction motor is a high-performance medium-duty industrial drive unit, featuring a 6-pole configuration and a rated speed of 900 RPM—closely approximating the 1000 RPM synchronous speed under 50Hz three-phase alternating current (AC) power supply. Its core operational mechanism hinges on electromagnetic induction: when three-phase AC is supplied to the stator windings, a uniform rotating magnetic field (RMF) is generated, with rotational speed determined by power frequency and pole pair count. 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 consistent power transmission for load-sensitive equipment.

Structurally engineered for durability and harsh-environment adaptability, the motor adopts a rugged cast-iron frame with IP54 protection class, providing reliable dustproof and waterproof performance to withstand dusty workshops, high-humidity agricultural settings, and municipal 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 6-pole rotor features a die-cast aluminum squirrel-cage structure, ensuring high mechanical strength, low rotational inertia, and minimal maintenance requirements, 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 11.5A, rated power factor ≥0.86, starting torque 1.7 times the rated torque for reliable startup under light-to-medium loads, and maximum torque 2.1 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 ≤74dB at 1m. Widely used in mechanical processing, agricultural irrigation, municipal water treatment, and low-speed ventilation systems, it supports both horizontal and vertical mounting. Regular maintenance—including insulation resistance testing (≥2MΩ at 500V DC) and bearing lubrication—extends its service life, making it a cost-effective and reliable drive solution.