1.1KW 2-Pole Three-Phase Induction Motor Introduction

This 1.1KW three-phase induction motor is a high-reliability industrial drive unit tailored for stable operation, characterized by its 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 operation relies on the principle of electromagnetic induction: when three-phase AC is applied to the stator windings, a uniform rotating magnetic field (RMF) is generated, which cuts the rotor conductors to induce an electromotive force (EMF) and eddy currents. The interaction between the induced currents and the RMF produces electromagnetic torque, driving the rotor to rotate with a low slip ratio (typically 3% to 5% at rated load), a hallmark of asynchronous operation that ensures smooth power output and load adaptability.

Engineered with optimized electromagnetic circuit design, the motor achieves excellent energy efficiency compliant with IE2/IE3 international standards, paired with low harmonic vibration and noise emission (≤75dB at 1m distance). This is attributed to precision-balanced squirrel-cage rotor assemblies, optimized air gap clearance, and a symmetrical stator core lamination structure—crafted from high-permeability silicon steel sheets to minimize core loss and enhance magnetic flux density. The motor adopts a modular structural design, with a rugged cast-iron frame (IP54 protection class as standard) that delivers superior mechanical rigidity and natural convection heat dissipation, ensuring stable operation even in high-humidity, dusty, or moderately corrosive environments.

In terms of 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 excellent dielectric strength—effectively preventing insulation breakdown and extending the motor’s service life. The 4-pole rotor features a die-cast aluminum squirrel-cage structure, a design that offers high mechanical strength, low rotational inertia, and minimal maintenance requirements, making it suitable for continuous duty cycle operation. Precision sealed deep-groove ball bearings are integrated at both ends of the output shaft, lubricated with lithium-based grease to reduce frictional loss and ensure smooth rotation, while the corrosion-resistant electrophoretic coating on the frame enhances resistance to ambient wear and chemical erosion.

Key performance parameters of this motor are meticulously calibrated for industrial applicability: rated power of 1.1KW, rated voltage of 380V (three-phase), rated frequency of 50Hz, and a rated power factor of ≥0.83. It exhibits a starting torque of 1.8 times the rated torque, enabling reliable startup under light-to-medium load conditions, and a maximum torque of 2.2 times the rated torque to cope with occasional load fluctuations. The motor’s speed regulation stability is outstanding, with a speed variation rate of ≤2% under rated load changes, ensuring consistent performance for load-sensitive equipment. Additionally, it features a compact footprint (length×width×height customizable per installation needs) and supports both horizontal and vertical mounting, enhancing compatibility with diverse equipment layouts.

Classified as a light-to-medium-duty industrial motor, it is widely deployed across multiple sectors. In mechanical processing, it serves as the core drive for small lathes, milling machines, and packaging machinery, providing steady torque to guarantee processing precision. In agricultural applications, it powers irrigation pumps, grain conveyors, and greenhouse ventilation systems, adapting to intermittent and continuous operation demands. For municipal engineering and environmental protection, it is commonly used in small water treatment equipment, ventilation fans, and garbage sorting conveyors. The motor complies with IEC 60034 international standards, featuring inherent overload and phase-loss protection potential when matched with dedicated motor protectors, which trigger automatic shutdown under abnormal conditions to prevent motor damage.

To maximize operational efficiency and service life, proper operation and maintenance are recommended: the motor should be operated within the ambient temperature range of -15℃ to 40℃ and relative humidity ≤95% (non-condensing), and regular maintenance includes cleaning stator windings to remove dust, inspecting bearing lubrication status, testing insulation resistance (≥2MΩ at 500V DC), and tightening terminal connections to avoid poor contact and overheating. With its balanced combination of energy efficiency, durability, and versatility, this 1.1KW 4-pole 1400RPM three-phase induction motor offers a cost-effective and reliable power solution for diverse industrial, agricultural, and municipal applications.