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Application of frequency converter in food machinery

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1. The working principle of food packer. The pillow type automatic packaging machine is the most advanced and reliable technology design and production in China, which brings together the essence of many years of experience in the packaging machinery field. The packer can use various composite packaging membrane to pack the lump food, which is very suitable for the needs of the vast number of users in China. Br> 1) the electrical part of automatic packaging machine is generally composed of the following:
A) the main control circuit is composed of frequency converter and programmable controller (PLC)
b) the temperature control circuit is composed of intelligent temperature control meter (see the figure below), solid-state relay, thermocouple elements, etc., with accurate temperature control, intuitive display and convenient setting
C) realize multi-point tracking and detection by photoelectric switch and electromagnetic proximity sensor
2) working principle of fully automatic pillow type:
with the improvement of automation, the operation, maintenance and daily maintenance of the packaging machine are more convenient and simple, reducing the professional skill requirements for operators. The quality of product packaging is directly related to the temperature system, the accuracy of host speed, the stability of tracking system and so on
the tracking system is the control core of the packaging machine. It adopts forward and reverse two-way tracking to further improve the tracking accuracy. After the machine is running, the film mark sensor constantly detects the film mark (color code), and the tracking microswitch of the mechanical part detects the position of the machine. The above two signals are sent to the PLC. After program calculation, the positive and negative tracking of the tracking motor is controlled by the outputs y6 (positive tracking) and Y12 (negative tracking) of the PLC, The errors of packaging materials in the production process shall be found in time and compensated and corrected accurately, so as to avoid the waste of packaging materials. If the number of times to be inspected cannot meet the predetermined requirements, the waste can be avoided automatically
due to the use of frequency conversion speed regulation, the chain transmission is greatly reduced, the stability and reliability of machine operation are improved, and the noise of machine operation is reduced. It ensures the high-tech level of multifunctional and automatic packaging machine, such as high efficiency, low loss and automatic detection. Make it not only have a beautiful and fashionable appearance, but also have a healthy and smart mind
although the application function of the transmission system used in the food packaging machine is relatively simple, it has high requirements for the dynamic performance of the transmission. The system requires fast dynamic following performance and high speed stability accuracy. Therefore, the dynamic technical indicators of the frequency converter must be considered, and the selection of high-performance frequency converter can meet the requirements
saj8000g vector general-purpose frequency converter can meet the requirements of packaging machine because it has the following characteristics:
1) apply speed sensorless vector control technology to automatically correct the frequency, so as to achieve the effect of stable motor speed when the load changes
2) it has high speed stability accuracy and fast dynamic response, and can meet the requirements of transmission control in high-performance occasions. The time and economic loss caused by transmission system failure
are reduced. At the same time, the speed sensor is omitted and the maintenance cost is low
3) it has the advantages of rich functions, stable performance, miniaturization and low noise operation
II. Advantages of using easy energy frequency conversion speed regulation equipment
1) simplify the transmission system, greatly reduce the failure rate and reduce the maintenance cost of enterprises
2) increase output and reduce cost. It can improve production technology, improve product output and quality, effectively save costs, and maximize profits
3) realize the software of control and improve the function
4) realize non tripping operation through torque compensation, stall prevention and restart; So that the product quality is stable and the efficiency is improved
III. application schematic diagram of saj8000g vector universal frequency converter in food packaging machine
main parameter setting: f039 = 2. The operation control mode is external terminal control F040 = 1 · 08, the frequency is 0-10V, the signal control F041 = 22 sets the positive and negative converter F041 = 23, clears the positive and negative converter f047 = 32, and controls the output of the positive and negative converter, Use terminals a and B F044 = 9 for forward inching operation to control f019 = 15 inching operation frequency function and function:
self fault relay realizes switch self-locking function, and inching operation can be realized after FWD is disconnected from DCM. This function is the application of saj8000 series inverter to realize contactless control
food machinery has achieved good results so far. It shows that the application of saj8000 series frequency converter in food packaging machinery is successful

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