| With the development and progress of science and technology constantly, automation control theory, computer network technology, the rapid development of communication technology in the automotive manufacturing process, control a single motor can not meet the actual production process of technological requirements, more and more technology processes need to simultaneously control multiple motors, especially coating line, multi-motor synchronous control has become an important issue in the development of the industry.In a typical AC variable speed mode, the inverter has good properties, used widely, AC variable speed technology is also the most investigational. With the power electronics technology and the progress and improvement of the characteristics of frequency control technology is constantly improving, and frequency conversion technology in the production process can improve production efficiency, energy conservation, energy-saving rate of around 30%, in the multi-control theory motor synchronous control process will also play a role in the first control point. This article will briefly Frequency relevant principles,, in full consideration of the cost of hardware, repair and maintenance costs, under the premise of running stability, have proposed a multi-motor PLC, inverter, AC induction motor synchronization control system constructed in the car Production Process of the bill. This paper will control the overall system design, and application of the principles of multi-motor synchronous control effects were analyzed to establish a multi-motor synchronous control program.In recent years, multi-motor synchronization has been very widely applied to automobile production process, conducting synchronous control most of digital and analog control, mechanical and electrical synchronization synchronization method of combining the needs of production processes. This synchronization approach, there are complicated wiring, control accuracy and low defects. To solve these problems, we need a method of controlling more performed, the paper will include a full digital electrical synchronization scheme used to build fieldbus systems. For automotive production process, the real time is a more important part, the text will include programs to synchronize several multi-motor control and comparison and analysis, the final status of the current technology in the automotive industry, design and new production lines and transmission form control mode outlook. |