7.5KW 6-Pole Three-Phase Induction Motor Introduction

This 7.5KW three-phase induction motor is a high-torque medium-duty industrial drive component, featuring a 6-pole configuration and a rated speed of 900 RPM—closely approaching the 1000 RPM synchronous speed under 50Hz three-phase alternating current (AC) power supply. Its core operation is rooted in the principle of electromagnetic induction: when three-phase AC is supplied to the stator windings, a uniform rotating magnetic field (RMF) is generated, and the RMF cuts the rotor conductors to induce electromotive force (EMF) and eddy currents. 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 low-speed, load-sensitive equipment.

Structurally engineered for durability and low-speed adaptability, the motor adopts a rugged cast-iron frame with IP54 protection class, providing effective dustproof and waterproof performance to withstand harsh working environments such as dusty workshops, high-humidity agricultural settings, and municipal facilities. The stator is fitted with high-purity oxygen-free copper windings encapsulated in Class F insulation material, boasting a 155℃ thermal endurance temperature, which minimizes copper loss and prevents insulation breakdown under prolonged low-speed operation. 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 calibrated for industrial applicability: rated voltage 380V (50Hz), rated current approximately 15.2A, and a rated power factor of ≥0.86. 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 handle occasional load fluctuations. Compliant with IE2/IE3 energy efficiency standards, it minimizes energy consumption, with noise emission controlled at ≤75dB at 1m. Widely used in low-speed mechanical processing, agricultural irrigation pumps, municipal ventilation systems, and conveyor equipment, 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 low-speed drive solution.