Why choose a frameless motor for robot joints?

Frameless motors and stepper motors each have their unique features and advantages, but in the application of robot joints, e.g. robot arm joint, frameless motors often provide several key benefits:

Higher torque density: Frameless motors can deliver higher torque within a smaller volume, which is especially important for space-constrained.
Lower weight: Frameless motors lack a standard casing and additional structural components, making them lighter than stepper motors with the same performance. This helps reduce the overall weight of the joint robot, enhancing its dynamic performance and energy efficiency.
Flexible integration: The “shell-less” design of frameless motors allows them to be seamlessly integrated into robot arm joints, interfacing smoothly with other structural components of the robot. This simplifies the design and assembly process.
Higher efficiency: Frameless motors are generally more efficient and produce less heat. This aids in heat management during extended operations, particularly in sealed robot arm joints where excessive heat could degrade performance or cause damage.
Better response speed and precise control: Compared to stepper motors, frameless motors provide more precise control and faster response times, which are crucial for high-performance robotic systems that require quick and accurate movements in robot joints.

Why do we design frameless motors for robot joint?

In the field of hub motors for electric vehicles, we have developed advanced technologies and a mature supply chain that enhance the performance and cost-effectiveness of our frameless motors. Additionally, our products have undergone stricter safety and durability tests in the automotive industry, making them more reliable.

We apply this technology to critical robot joints. This enhances performance and reliability. As a result, the overall performance of the robots is improved.

What are the benefits of our frameless motors?

Our frameless torque motors come in two series: the U Series (Universal Series) and the Bot Series (Customized for robot).

The U Series adopts the world-leading Halbach array electromagnetic design and patented flat-wire winding technology, featuring ultra-high power density, efficiency, precision, low noise, and high reliability. It is suitable for the majority of current robot applications.

The Bot Series, tailored for humanoid or bipedal robots, builds upon the technology and performance of the U Series. It further enhances the design with a globally leading torque-to-weight ratio, higher peak torque, and stall torque. After application in robot knee, robot hip, and robot arm joints, it can significantly improve load capacity, explosive movement, and stability. Additionally, the Bot Series frameless torque motors optimize motor weight, effectively reducing the robot’s overall weight.