When a Tiangong robot equipped with a Qianghe Motor U85 series frameless torque motor completed a half marathon in 2 hours and 40 minutes at the 2025 Global Robot Games, the entire industry recognized the arrival of a revolution in robotic joint drive technology. This core component, weighing only 0.306 kg, delivers a rated torque of 1.21 Nm, perfectly embodying the technological essence of "powerful yet lightweight." Amidst the explosive growth of the robotics industry, Qianghe Motor, with its 14 years of technological expertise, is becoming a core force driving advancements in robotic joint drive technology.
The global robotics industry is poised for explosive growth. Data from the Robotics Research Institute indicates that the global market for humanoid robot joint motors will exceed 38 billion yuan in 2025, with a compound annual growth rate of 87%. However, robotic joint drives have long faced a dilemma: "Strength comes with weight, while flexibility comes with weakness." Traditional motors are either bulky, limiting flexibility, or insufficient output, limiting their application scenarios. China's "14th Five-Year Plan for the Development of the Robotics Industry" clearly requires that the localization rate of key components must exceed 70% by 2025. This policy window has brought a historic opportunity for local companies to break through in technology.

It is against this backdrop that Qianghe Motor's frameless torque motor technology has achieved a breakthrough. Traditional motors rely on an external frame support structure, which not only increases weight but also affects heat dissipation efficiency. Qianghe Motor innovatively adopts a frameless design that directly combines the rotor and stator. By combining fractional-slot concentrated windings with a Halbach array magnetic circuit, the torque density reaches 3-5 times that of ordinary motors. This "frameless" revolution reduces the motor's weight by 15% while, combined with liquid cooling technology, increasing efficiency to over 95%, fundamentally resolving the performance bottleneck of traditional drive solutions.
 

Qianghe Motor's technological advantages are reflected in collaborative innovation across three dimensions. In terms of power density, its U-series frameless motors utilize third-generation NdFeB magnets (magnetic energy product 50 MGOe) combined with an amorphous alloy core to reduce iron loss. This enables the U85 series to achieve a maximum instantaneous torque of 6 Nm, fully meeting the power requirements of humanoid robot hip and knee joints. This performance enables the robot to not only easily lift 50 kg but also maintain stable output during a half-marathon.
In terms of control precision, Qianghe Motor integrates a 24-bit encoder and torque sensor to form a closed-loop feedback system, achieving an angular control accuracy of ±0.025° and torque fluctuation within 1%. This micron-level control capability enables the UBTECH Walker S robot to perform delicate operations such as grasping an egg without breaking it, and also enables medical surgical robots to achieve submillimeter precision. In the U-series products, launched in 2024, leveraging 14 years of accumulated motion database and AI algorithm optimization, joint response speed has been further improved to 0.1ms, ensuring stable center of gravity control during high-speed movements.
 

The lightweight design also highlights numerous highlights. The Qianghe motor utilizes carbon fiber and a hollow structure. The U25 model weighs only 0.024 kg yet delivers a rated torque of 0.08-0.025 Nm. A special potting process not only ensures water and dust resistance but also creates an efficient heat dissipation channel, enabling stable operation within a wide temperature range of -20°C to 80°C. This design extends the battery life of robots equipped with these motors by 30%, completely eliminating the awkward "two-hour charge, half-hour operation" situation of traditional robots.
Shenzhen Qianghe Motor Co., Ltd. was established in 2011. After 14 years of technological development, Qianghe Motor has made the leap from laboratory prototypes to large-scale mass production. Production is expected to reach approximately 50,000 units in 2024, with an expected output exceeding 100,000 units in 2025. Currently, its frameless motors offer outer diameters ranging from 16 to 200 mm, adapting to various robot joints such as the shoulder, elbow, and wrist. The company already holds over 25% market share in the collaborative robot sector. Deep collaborations with industry leaders such as the Beijing Humanoid Robot Innovation Center, Weijing Intelligent, and UAI have enabled their technological solutions to rapidly penetrate multiple scenarios, including industry, healthcare, logistics, and humanoid robot joints.
Qianghe Motor's industrialization capabilities are impressive. They have achieved coordinated testing of motors, controllers, and reducers, shortening the development cycle from the traditional 6-8 months to 3 months. They have obtained numerous international certifications, including CE, ISO9001, and Reach. Their 27 jointly applied patents cover core technologies such as high-heat dissipation yoke structures and low-cogging torque winding topologies, establishing a solid intellectual property defense.

As joint drive technology breaks through the bottleneck of "powerful yet lightweight," the collaborative relationship between robots and humans is being redefined. Qianghe Motor's technological innovation is not only reflected in improved parameters—torque density exceeds 0.8 N·m/kg and costs are 30% lower than imported solutions—but more importantly, it opens up new possibilities for robotic applications.
Qianghe Motor's frameless torque products combine high dynamic response, high torque density output, and precision encoding technology to achieve a 50% increase in torque density and a response speed exceeding 0.1ms, successfully breaking through the core bottleneck of robotic joint drive.
Qianghe Motor's practice proves that breakthroughs in robotic joint drive technology are not simply a matter of adding parameters, but rather systematic innovations in materials science, control algorithms, and structural engineering. As "powerful yet lightweight" becomes the new industry standard, we have reason to believe that more diverse and powerful robots will enter our lives. Qianghe Motor's frameless torque motor layout, with every precisely rotating joint, is driving the accelerated arrival of the robotic era.