Humanoid robots are driving the development of robot servo motors. Since last year, robot servo motors have been getting smaller and smaller, with higher and higher technical requirements. The [sensitive word] trend is that three - phase brushless servo motors will gradually become the mainstream of development. Their lifespan will be more than three times that of brushed motors, and their working efficiency can be increased by more than 50%.

The drawbacks of traditional brushed motors can no longer meet the needs of the rapid development of robot technology. Problems we often encounter include high - temperature arcs, sparks, and metal shavings during commutation, as well as a short lifespan, large size, and difficulty in control. For robot enterprises, the high cost of servo motor repair is a major concern.

Judging from the repair situation of humanoid robots on the market, most problems occur in servo motors. For example, gear tooth breakage and wear lead to the inability of hand and leg joints to rotate; poor motor impedance consistency leads to increased power consumption and damage to drive components, and so on.

From the user's perspective, the instability of servo motors often causes robots to stumble, have unstable centers of gravity, or the servo motors have excessive swing amplitudes, resulting in joints getting stuck and unable to be positioned. These are all unacceptable.

Therefore, we need more powerful servo motors to support the high - intensity operation of humanoid robots. The newly launched three - phase drive chip by Taiwan Jingzhi Semiconductor Co., Ltd. (hereinafter referred to as Jingzhi Semiconductor) has effectively solved these problems.

Chen Weijin, an application engineer at Jingzhi Semiconductor, said, "The three - phase drive chip AM2885 of Jingzhi Semiconductor provides a powerful heart and is packed into a tiny space with an LGA (4.5mm * 4.5mm) package. We have retained all the advantages of traditional discrete components (with an extremely low internal resistance of less than 80mΩ) and successfully miniaturized it. Then, we endow it with a new soul (such as new architectures like the current limit function, TSD, dead - zone protection, etc.), making the originally outdated motor drive more suitable for future robot servo motor solutions and applications.

Jingzhi Semiconductor has highly integrated the drive chip, involving technologies such as low - conduction voltage, ultra - low internal resistance, built - in dead - time, over - current and over - temperature protection mechanisms. The AM2885 chip can improve the output capacity, reduce the generation of ineffective power, and lower the surface temperature of the chip itself. Moreover, the built - in dead - time is 0.5 microseconds. Under the high - precision operation of the servo motor, accurate positioning control can be achieved, so the robot's movements are smooth without delay.

Chen Weijin said, "Originally, the servo motor drive current was about 1A. However, due to the increasing weight of the robot itself and the growing requirements for performance, during the robot's movement, the continuous drive current of the servo motor will increase to 3 - 5A. If the AM2885 chip is used, it can not only support the continuous output of higher - performance current (3 - 6A), but also due to the reduced package size (4.5mm * 4.5mm), the area of the PCBA is reduced, greatly simplifying the system design difficulty, thus achieving the goals of servo motor miniaturization and multi - functionality."

In the process of continuous miniaturization of robot servo motors, the AM2885 chip of Jingzhi Semiconductor injects new vitality into robot servo motors, enabling smaller servo motors to be more capable. This also conforms to the development trend of humanoid robot technology. In the future, the development of humanoid robots can also achieve miniaturization, allowing smaller humanoid robots to accompany us and be convenient to carry.

High - integration chips can not only reduce the rework rate during factory production, but also improve the stability of components and significantly shorten the R & D process. For robot enterprises, this means that they can shorten the manufacturing time of humanoid robots in the future and provide more reliable products.