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    4 hp (3 kW) AC Servo Motor, 15 Nm, 2000 rpm

    15 Nm high torque AC servo motor features 3 kW (4 hp) power rating, 2000 rpm, peak torque up to 30 Nm, 150mm square flange size, equipped with a 2500 PPR incremental encoder, three phase 220V/ 380V rated voltage.
    SKU: ATO-SERVO-150S3000
    Free Shipping Worldwide
    Delivery date: 6-12 days

    3 kW (4 hp) power rating brushless AC servo motor, 15 Nm high torque, precision speed control, with rated speed of 2000 rpm, max speed up to 4500 rpm. Heavy duty electric servo motor features enhanced durability in harsh industrial environments.


    Basics Model ATO150CST-M15020
    Matched Drive Model ATOMG-1000 (Click it to the product page)
    Square Flange Size 150mm
    Rated Power 3 kW (4 hp)
    Rated Voltage Three phase 220V AC (Optional: 380V AC)
    Rated Current 14 A
    Rated Speed 2000 rpm
    Rated Torque 15 Nm
    Peak Torque 30 Nm
    Weight 15 Kg
    Length 230 mm
    Technical Parameters Voltage Constant 70 V/ 1000r/ min
    Brake Voltage 24V DC
    Torque Coefficient 1.07 Nm/ A
    Torque Inertia 3.88 x 10-3 Kg.M2
    Line-Line Resistance 0.34 Ω
    Line-Line Inductance 1.55 mH
    Electrical Time-Constant 4.56 ms
    Encoder Line Number 2500
    Insulation Class Class F
    Safety Class IP65
    Environment Temperature -20℃ ~ +40℃
    Humidity <90%RH, (no dewing)


    • Accuracy: ATO AC servo motors realize closed-loop control of position, speed and torque, overcome the problem of stepper motor out-of-step.
    • Speed: Good high-speed performance, rated speed can reach 1000-3000 rpm.
    • Adaptability: ATO heavy duty servo motors with strong anti-overload capability, able to withstand a load three times the rated torque, especially suitable for occasions with instant load fluctuations and requiring quick start.
    • Stable: Our AC brushless servo motors have smooth low-speed operation, no stepping phenomenon similar to stepper motor will occur when running at low speed, suitable for occasions occasions requiring fast response.
    • Timeliness: The dynamic response time of motor acceleration and deceleration is short, generally within tens of milliseconds.
    • Safety: ATO AC servo motor protection grade is IP65, which meets the waterproof and dustproof requirements.

    Dimension (unit=mm)
    4 hp 15Nm servo motor 150mm dimension

    LA (without brake): 230mm, LA (with brake): 303mm

    Winding and Encoder Connection

    1. For servo motor winding

    motor Winding Plug Motor Line U V W PE
    Socket Number 2 3 4 1

    2. For incremental encoder

    Incremental Encoder Socket (15 Pin) Signal Definition 5V 0V B Z- U Z U- A V W V- A- B- W- PE
    Socket Number 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1

    3. For absolute encoder

    Absolute Encoder Socket (7 Pin) Signal Definition E- E+ SD- 0V SD+ 5V PE
    Socket Number 2 3 4 5 6 7 1

    3 tips for replacing stepper motor with servo motor

    1. To ensure that there is not too big change in control system, it is suggested to choose digital servo system, which can still use the original pulse control method.
    2. As the overload capacity of servo motor is strong, 1/3 of original stepper motor rated output torque can be as reference to determine the servo motor rated torque.
    3. Since the rated speed of servo motor is much higher than stepper motor, it is better to add a deceleration equipment, so as to make servo motor run at rated speed. To reduce the cost, it is also feasible to choose the motor with smaller power.
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