Frameless torque motor

Leroy-Somer’s frameless torque motors consist of a separate rotor and stator which are assembled directly inside the machine. The result is a compact, fully-integrated motor with improved dynamic performance. The rotor and stator can be modified to match your machine and the motor winding can be customized to adapt the motor speed to the application. Various encoder solutions, solid and hollow shafts are available to ensure the rotor speed and motor position.

  • Advantages

    Direct Drive Technology 

    • High torque with low speed for maximum precision
    • Increased motor stiffness for dynamic operation
    • Short motor lengths
    • Less vibration for quiet operation
    • Increased efficiency
    • No need for mechanical transmission elements (gearboxes etc)

    Machine-integrated assembly

    • Ultimate compactness
    • Reduced vibration, noise and inertia
    • Increased lifespan

    Range of options for customization

    • Customized rotor and stator for perfect machine fit
    • Customized motor winding for speed adjustment
    • Choice of encoders and sensors​

  • Main characteristics

    Because our torque motors are custom-built, their specifications vary considerably depending on the required application. The table below gives an overview of the motor sizes, speeds and torques available. For more information on how to configure your personalised direct drive solution, contact one of our engineers.


    Ingress protection IP 65
    Stall Torque N.m 20 to 35
    Peak Torque N.m 60 to 105
    Voltage​​ V 380/480​
    ​Max speed rpm 1500
    Stator Size mm 111 / 136 / 158 /188
    ​Motor length mm 122 to 182

     

     

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