Today, with the rapid development of science and technology, every technological leap is a brave exploration of the unknown world, and the birth of every innovation indicates the reshaping of the industry pattern.
With the rapid development of AI technology, the performance and cost of joint dynamics are becoming an important barrier to robots entering human activity scenarios, and innovation is urgently needed.
As the earliest company engaged in the R&D, design and manufacturing of robot core components in China, after years of R&D layout, Maita Intelligence and Dingzhi Technology have formed an ecological chain of core components that integrate complete product solutions such as torque frameless motors, coreless motors and linear transmission mechanisms, and have established good cooperative relations with many well-known robot manufacturers at home and abroad.
Recently, Maita Intelligence and Dingzhi Technology jointly released a new generation of high-performance, high-reliability, and cost-effective frameless motors, aiming to solve the power performance and cost problems of integrated joint modules and help the rapid development of the humanoid robot industry.
▍List of product families
It is reported that for the release of the high-performance frameless motor, the engineering and technical personnel of Maita Dingzhi have done a lot of preliminary market research and overcome a number of design and process problems, and precipitated a number of patented technologies.
The team members have systematically optimized and improved the mechanical and electrical intelligence, electromagnetic characteristics optimization and manufacturing process to better meet the demanding performance requirements of robot products in terms of high precision, high torque density, low cogging torque and low heating.
At the same time, the team members also fully consider the cost factor. By optimizing the process flow and self-developed process equipment, the manufacturing loss is greatly reduced; Through the use of self-developed module products and the signing of long-term purchase agreements with major customers, centralized large-scale procurement is formed, so as to effectively reduce the cost of material procurement; Better benefit the small and medium-sized procurement needs of the robot industry at this stage.
The following are the specific aspects of the optimization of the high-performance frameless series products;
1. Mechatronic intelligence
The high-performance frameless motor of the pulse tower Dingzhi deeply integrates a variety of sensing devices such as high-precision digital Hall sensors, high-precision embedded magnetic coding fusion sensors, and temperature sensors, and the encoder has a single-turn accuracy of up to 0.01 degrees, which can be used with the pulse tower driver to achieve multi-turn counting.
Figure 1 Data for a frameless series motor encoder
Based on high-precision motor position feedback, it realizes smoother control performance of the motor at low speed;
Figure 2 The target fluctuates at 1 RPM in the speed mode of the frameless series motor ± 1 RPM
2. Optimization of electromagnetic characteristics
1) The segment block stator structure is adopted, and the stator skeleton is overmolded as a whole, which improves the adhesion between the insulation layer and the iron core, which is conducive to the heat dissipation of the motor; Make full use of the space in the stator slot, increase the slot filling rate, and improve the efficiency of the motor; The maximum efficiency of this series of motors can reach more than 90%; The overall efficiency is better than similar products at home and abroad.
FL Simulation and Measured Parameters:
Comparison of efficiency and torque tests:
2) Optimization of cogging torqueThrough scientific data simulation and multiple sample verification, the team has comprehensively optimized the stator geometry, rotor punching and air gap design, etc., so that the cogging torque performance of this series of frameless motor products is very good, and the cogging torque is less than 3% of the rated torque.
Cogging torque simulation diagram:
Cogging torque measurement diagram:
3) The torque performance of the motor is improved
Low speed and high torque are another major feature of this type of frameless torque motor, and the team of Maita Dingzhi has optimized a series of measures and means such as motor crack ratio, air gap magnetic flux and process weight reduction. The maximum torque/weight ratio of 10N.M/kg for low-voltage motors has been achieved.
Magnetic field diagram of the air gap
3. Excellent manufacturing process and protective characteristics
The whole series of frameless products have an integrated epoxy potting process, and the insulation level of the whole machine reaches F level or above, which is waterproof and corrosion-resistant; The potting process provides good heat dissipation conditions for the stator, so that the motor can work for a long time at 1.5 times the rated torque (under the S9 working system); The built-in highly sensitive temperature sensor provides motor temperature information in a timely manner, which is convenient for driving and effective temperature management.
FL Frameless Torque Motor:
FL frameless motor parameter table:
To sum up, the high-performance frameless motor with its compact structure, high performance, mechatronics and other innovative designs provide more options for the market, and will also help customers create better products and value.
▍ Conclusion and the future
Looking forward to the future, with the continuous progress of humanoid robot technology and the continuous expansion of application fields, the requirements for the performance of underlying control components such as motor drives are also getting higher and higher.
The realization of multi-product matrix and amplification of product core capabilities will enable the motor driver to better adapt to various complex application scenarios and provide strong support for the wide application of humanoid robots in more fields.
At the World Robotics Conference in Beijing on August 21, Maita Intelligence will also exhibit the latest products, and we sincerely invite you to visit booth A-135 to watch the latest humanoid robot module achievements of Maita Intelligence.