A frameless motor, also known as a direct drive motor,is a type of electric motor where the rotor (the rotating part) is directly integrated with the driven load, without the use of a separate housing or frame. This design eliminates the need for mechanical transmission components such as gears, belts, or pulleys, resulting in a more compact and efficient system.

Design: Frameless motors typically consist of a stator (the stationary part) and a rotor (the rotating part), but they lack the traditional housing or frame found in conventional motors. The stator may be mounted directly onto the stationary structure of the application, while the rotor is integrated with the driven load, such as a shaft or other mechanical component.

This design allows for a more compact form factor and reduces the motor's overall weight.

Advantages:

Compactness: Frameless motors are typically smaller and lighter than traditional motors with equivalent power ratings, making them suitable for applications where space is limited.

High Efficiency: The direct drive configuration eliminates the energy losses associated with mechanical transmission components, resulting in higher overall efficiency.

Improved Performance: Frameless motors offer precise control and high torque-to-inertia ratios, making them suitable for applications requiring fast response times and precise motion control.

Reduced Maintenance: With fewer moving parts, frameless motors generally require less maintenance and have a longer service life compared to motors with mechanical transmissions.

Applications: Frameless motors find applications in various industries, including robotics, aerospace, medical devices, industrial automation, and semiconductor manufacturing. They are particularly well-suited for high-performance applications where compact size, high efficiency, and precise control are critical.