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    1.5 hp (1.1kW) 3 phase 4 pole AC Induction Motor

    Three-phase 4-pole AC induction motor, with nominal power of 1.5 hp or 1.1kW, has output voltage of 380V, 400V and 415V available with the nominal speed of 1400rpm. Low cost, high reliability and simple operation.
    SKU: ATO-M-IM-1100-4
    Free shipping
    Delivery date: 6-12 days

    1.5 hp (1.1kW) 3-phase 4-pole AC induction motor or asynchronous motor features 1400rpm of rated speed with Totally Enclosed Fan Cooled design. It can widely used in various kinds of general purpose machineries like fans, pumps, compressors, machine tools, transportation and so on.


    Basics Model ATO-Y2-90S-4
    Design Standard IEC
    Weight 19kg
    Frame Type 90S
    Mounting Horizontal Foot Mounting (B3)
    Wiring Method Output≤4hp (3kW), Y connection
    Output≥5.5hp (4kW), Delta connection
    Degree of protection IP54/IP55
    Insulation Class Class F
    Cooling TEFC (compliance to IC 411 code of IEC 60034-6)
    Technical Parameters Nominal Output 1.5hp or 1.1kW
    Pole Number 4-pole
    Nominal Speed 1400rpm
    Frequency 50Hz
    Nominal Voltage 380V 400V 415V
    Nominal Current (full load) 2.85A 2.71A 2.61A
    Efficiency 76.2%
    Power Factor (cosφ) 0.77
    Nominal Torque (Tn) 7.5Nm
    Locked Rotor Torque/Nominal Torque (TST/Tn) 2.3
    Maximum Torque/Nominal Torque (Tmax/Tn) 2.3
    Locked Rotor Current/Nominal Current (IST/In) 6.0
    Noise Level 61dB/(A)
    Environment Ambient Temperature -15℃+40℃
    Altitude Less than 1000m above sea level

    Note: Our minimum order quantity for 400V AC and 415V AC @ 50Hz induction motor is 10 pcs, and our MOQ for 60Hz induction motor is 20pcs.

    3-phase Induction Motor Dimensions
    3-phase AC induction motor dimensions

    Frame Type Mounting Dimensions Overall Dimensions
    A A/2 B C D E F G H K AB AC AD HD L
    90S 140 70 100 56 24 50 8 20 90 10 180 195 150 260 360

    Wiring Diagrams (Three-phase squirrel-cage induction motor)
    3 phase induction motor wiring connection diagram

    Tips: Induction motor’s characteristics
    Compared with other motors, the induction motor has the advantages such as simple structure, convenience in manufacture, use and maintenance, high operational reliability, light weight, low cost. Taken the three-phase induction motor as an example, compared with the DC motor with the same power and speed, the former weight is only half of the latter at one-third cost. It also has the load characteristics of constant speed that can satisfy machinery driving requirement of a majority of industrial and agricultural production. Its limitation is that due to the poor speed controlling performance caused by the fixed slip between its rotate speed and the synchronous speed of its rotating magnetic field, so it is not so economic or convenient as direct current motor under the usage occasion that requires a wider range of smooth speed control such as rolling mill, winding engine, large size machine tool etc. In addition, induction motors draw reactive power from the power system during the operation, resulting in the deterioration of power factor of power system. Therefore, on the occasion of high power and low speed such as driving ball grinding mill and compressor, using synchronous motors is more reasonable.

    In this video, ATO takes a 1hp (0.75kW) 220V/380V induction motor as example to explain the motor wiring. ATO first changes the wiring of induction motor from star connection to delta connection. When the induction motor is connected in delta connection, the rated voltage of motor is 220V, and when connected in star connection, the rated voltage is 380V. To demonstrate this change clearly, the induction motor is also connected to ATO 1-phase in 3-phase out VFD and it runs normally under the control of VFD.

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