Direct drive technology is a drive method that connects the motor directly to the load without passing through intermediate links such as transmission mechanism or reducer, thereby improving the efficiency, accuracy and reliability of the system. Direct drive technology is called the advanced method and technology in modern drive technology by foreign industry, and it is increasingly applied to various industries.

Recently, in the “2023 Qingdao intelligent manufacturing Innovation Application Forum”, Song Ningyi, product manager of Gaochuang transmission direct drive, pointed out that the price of direct drive motor and market requirements for speed and accuracy, led to the development of the entire direct drive market, direct drive motor is replacing the traditional ball screw transmission mode, especially with the development of the semiconductor industry, direct drive motor greatly improved machine performance. He said that with the increasing demand of users for direct drive motors, direct drive products maintain stable market growth, and by 2030, the global market size will reach 2.5 billion US dollars.

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Song Ningyi further shared his thoughts on the development trend and challenges of direct drive technology. He said that the current direct drive technology in semiconductor equipment, 3C electronics, CNC machine tools and other motion control accuracy and stability requirements of the industry has been widely used, in addition, there are photovoltaic, lithium, high-speed handling and other fields, linear motor has become the first choice for many users.

Compared with the traditional servo motor drive, direct drive has the advantages of fast motion, low friction, good system rigidity, simple structure, good maintenance, higher accuracy, long reliable time, etc., but at the same time, high manufacturing cost, complex control algorithm, long setting time, and the need for high resolution encoder.

Therefore, direct drive motor drivers must have high performance control algorithm to achieve high performance requirements, especially trajectory process control requirements and zero setting time control requirements. Song Ningyi said that in the advanced control algorithm of direct drive motor, the use of nonlinear control algorithm can double the robustness at the same gain, have higher sampling time and zero setting time, especially to match the high rigidity system, with advanced automatic debugging, easy to use.

Complex machine control also involves in-depth analysis of machine models and frequencies. To this end, Song Ningyi introduced the high degree of freedom polynomial controller and model-based design algorithm (HDM) developed by Gao Chuang, which realized the functions of cascade linear structure, non-uniform feedback, frequency analysis, automatic adjustable control design, etc., and through the three steps of advanced control mode system identification, model matching and automatic control parameter design. Demanding precision and precise path tracking for linear drives.