1.5KW 4-Pole Three-Phase Induction Motor Introduction

This 1.5KW three-phase induction motor is a high-stability industrial drive component, featuring a 4-pole configuration and a rated speed of 1400 rpm—closely approximating the synchronous speed of 1500 RPM under 50Hz three-phase alternating current (AC) power supply. Its core operational principle hinges on electromagnetic induction: when three-phase AC is applied 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 electromagnetic torque, driving the rotor to rotate asynchronously with a low slip ratio (3% to 5% at rated load), ensuring steady power output and strong load adaptability.

Engineered with an optimized electromagnetic circuit, the motor complies with IE2/IE3 international energy efficiency standards, minimizing copper loss and iron loss while suppressing harmonic vibration and noise emission (≤73dB at 1m distance). This performance is supported by precision-balanced squirrel-cage rotor assemblies, optimized air gap clearance (0.25-0.55mm), and a stator core laminated with high-permeability silicon steel sheets—effectively enhancing magnetic flux density and reducing energy waste. The motor adopts a rugged cast-iron frame with IP54 protection class as standard, delivering excellent mechanical rigidity, dustproof, and waterproof capabilities, enabling reliable operation in high-humidity, dusty, or moderately corrosive industrial environments such as workshops, farms, and municipal facilities.

In structural details, the stator is equipped with high-purity oxygen-free copper windings encapsulated in Class F insulation material, boasting a thermal endurance temperature of 155℃ and superior dielectric strength—effectively preventing insulation breakdown due to overheating and extending the motor’s service life. The 4-pole rotor features a die-cast aluminum squirrel-cage structure, a robust design that offers high mechanical strength, low rotational inertia, and minimal maintenance requirements, making it suitable for long-term continuous duty cycle operation. Precision sealed deep-groove ball bearings are installed at both ends of the output shaft, lubricated with high-temperature lithium-based grease to reduce frictional loss and ensure smooth rotation, while the frame’s electrophoretic corrosion-resistant coating enhances resistance to ambient wear and chemical erosion.

Key performance parameters are meticulously calibrated for industrial applicability: rated power of 1.5KW, rated voltage of 380V (three-phase, 50Hz), rated current of approximately 3.4A, and a rated power factor of ≥0.84. It delivers a starting torque of 1.7 times the rated torque, ensuring reliable startup under light-to-medium load conditions, and a maximum torque of 2.1 times the rated torque to cope with occasional load fluctuations. The motor exhibits excellent speed regulation stability, with a speed variation rate of ≤2% under rated load changes, meeting the precision requirements of load-sensitive equipment. Its compact footprint supports both horizontal and vertical mounting, compatible with couplings, belts, and gears, facilitating flexible installation in limited spaces.

Classified as a light-to-medium-duty motor, it is widely deployed across multiple sectors. In mechanical processing, it drives small lathes, milling machines, and packaging equipment, providing steady torque for precision processing. In fluid engineering and HVAC systems, it powers centrifugal pumps, centrifugal fans, and small air compressors, adapting to continuous operation demands. In agriculture and municipal engineering, it is used in irrigation systems, grain conveyors, and small water treatment equipment. Compliant with IEC 60034 standards, it supports overload and phase-loss protection with dedicated protectors, triggering automatic shutdown under abnormalities to prevent damage.

To maximize efficiency and service life, operate the motor within -15℃ to 40℃ ambient temperature and ≤95% relative humidity (non-condensing). Regular maintenance includes cleaning stator windings, inspecting bearing lubrication, testing insulation resistance (≥2MΩ at 500V DC), and tightening terminals. This 1.5KW 4-pole 1400RPM motor balances energy efficiency, durability, and versatility, offering a cost-effective, reliable power solution for industrial, agricultural, and municipal applications.