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    400W 24V DC Servo Motor, 2.25 Nm, 1500 rpm

    5 out of 5 based on 2 reviews | Write a review
    Best and high precision DC servo motor for sales, with 400 watt power rating, 21.3A current at 24V DC voltage, providing 2.25 Nm holding torque and 1500 rpm low speed. IP55 for body, long life and high reliable, free shipping from Chinese factory directly.
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    Delivery date: 6-12 days

    400WDC servo motor is brushless design, 1500 rpm rated speed, 80mm flange size, works at 24V voltage power supply, no-load speed up to 1700 rpm, 2.55 Nm rated torque and peak torque up to 7.65 Nm, equiped with 2500 PPR incremental encoder.

    Basic Specifications

    • Model: ATO-80AS0204-15
    • Rated Power: 400W
    • Rated Voltage: 24V DC
    • Rated Current: 21.3 A
    • Rated Torque: 2.55 Nm
    • Peak Torque: 7.65 Nm
    • Rated Speed: 1500 rpm
    • No-load Speed: 1700 rpm
    • Working Efficiency: 85%
    • Flange Size: 80mm
    • Weight: 4 kg

    Technical Parameters

    • Incremental Encoder Line: 2500 PPR
    • Rotary Inertia: 250 Kg.m2x10-6
    • Line Resistance: 0.084 Ω
    • Armature Inductance: 190 μH
    • Torque Constant: 0.119 Nm/A
    • Brake Apparatus Voltage: 24V DC, brake release when powered
    • Motor Lead Length: 1 meter
    • Back EMF: 10.9 vkr/min
    • Protection Grade: IP55
    • Insulation Class: Class F
    • Certification: CE, ISO


    1. 400W DC servo motor with IP55 protection grade and F class insulation structure
    2. Optimized winding end structure, minimized copper loss and iron loss, small size, light weight, low temperature rise and high efficiency (85%)
    3. Super coercivity, ATO DC brushless servo motors using NdFe35 permanent magnet material, strong anti-demagnetization ability, stable motor performance
    4. Low noise, low vibration, low moment of inertia
    5. High torque, fast dynamic response, wide speed range, strong overload capacity (4 times)

    Dimension (Unit=mm)

    400 watt 24V dc servo motor size

    Wiring Definition

    DC servo motors wiring definition

    Speed-Torque Curve

    400w 24V dc servo motor speed torque curve

    At no-load point: 2.39 (N.m)
    Speed: 1464.7 (r/min)
    Current: 20.806 (A)
    At max. efficiency point: 83.8 (%)
    Torque: 2.39 (N.m)
    Speed: 1464.7 (r/min)
    Current: 20.806 (A)
    Output power: 366.6 (W)
    At max. torque point: 2.39 (N.m)
    Speed: 1464.7 (r/min)
    Current: 20.806 (A)
    Output power: 366.6 (W)
    At max. output power point: 366.6 (W)
    Torque: 2.39 (N.m)
    Speed: 1464.7 (r/min)
    Current: 20.806 (A)



    400W DC Servo Motor Details

    Tips: Difference between DC servo motor and AC servo motor

    DC servo motors are divided into brush type and brushless type. Among them, the brush-type motor has low cost, simple structure, large starting torque, wide speed range, easy control and simple maintenance (carbon brush replacement), but it will produce electromagnetic interference and have requirements for the environment. Therefore, it can be used in general industrial and civil occasions, which are cost-sensitive. In terms of brushless-type motor, it has small volume, light weight, large output, fast response, high speed, small inertia, smooth rotation and stable torque.

    DC servo motor is easy to achieve intellectualization, because it has flexible electronic commutation mode, which can commutate square wave or sinusoidal wave. In addition, DC servo motor is free of maintenance and carbon brush loss with high efficiency, low operating temperature, low noise and electromagnetic radiation, as well as long service life, which can be used in various environments.

    AC servo motor has a good speed control property, which can achieve smooth control in the whole speed area with almost no oscillation, more than 90% of high efficiency, less heat production, high speed control and high-precision position control (depending on the accuracy of encoder). In rated operating area, it can achieve constant moment, low inertia, low noise, no brush loss and maintenance-free (applicable to dust-free and explosive environment). AC servo motor is also brushless motor, which can be divided into synchronous and asynchronous motors. At present, synchronous motors are commonly used in motion control, because they have large power range, large power, large inertia, low maximum speed and uniform descent with the increase of power. Therefore, they are suitable for low-speed and stable operation.

    Existing reviews of 400W 24V DC Servo Motor, 2.25 Nm, 1500 rpm
    Can the driver be controlled by a microcontroller to tune its parameters and configure its control modes?
    Can the driver be controlled by a microcontroller like Arduino, PIC, STM32...etc to tune its parameters and configure its control modes?
    From: Taz | Date: 03/03/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    This controller supports a variety of control signals: 0-5V analog voltage, single-ended analog voltage (potentiometer), RC (aircraft model signal), RS232, CAN2.0 (custom), CANOpen, etc. You can check if the microcontroller you are using is compatible with these control signals.
    Servo motor technology
    What technology (servo motor or IGBT) do you use for the  /-1% accuracy ($2649 version) at 120V?
    From: Reginar | Date: 27/08/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The technology is IGBT for use of the +/-1% accuracy version. It is a simple servo motor sliding contact type-other model.
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