Successful application of frequency converter in insulation cotton production line_(Londriver Stock) Wuxi Londriver Electric Co., Ltd.

Successful application of frequency converter in insulation cotton production line

Langfang City, Hebei Province is the base of rock wool and glass wool production in China. The traditional slip speed motor, speed control board and synchronizer are used to control the flow line. At present, our company has successfully transformed three production lines in the Shenzhou group of Dacheng County, Langfang city. There are nine flow production lines and two 12 flow production lines. The equipment is an automatic super large rockwool production line with pendulum method. The effective curing length of the board line is 25 meters, and the cyclone water spray dust removal and desulfurization process is adopted. After the transformation, customers reflect that the operation is stable, the synchronization effect is good, and the precision is high. The rate of electricity saving can reach 35%, the rate of defective products is greatly reduced, and the output is obviously increased.

Process flow of flow production line

Description of electrical system configuration
According to the production process and customer requirements configuration. The control system maintains friendly man-machine dialogue function. It is composed of man-machine interface, PLC, Tianlang Weichuang frequency converter and orron rotary encoder. PLC and Tianlang Weichuang frequency converters (12 sets) communicate with master-slave Modbus protocol. PLC is the main machine, and all frequency converters are slave machines with an address. (the stack number of frequency converter is set as 1-12) the main frequency of operation is set by man-machine (set the operation frequency of cotton collector as the main frequency), and broadcast command is sent to 1-12 frequency converter. 2 ා - 12 ා frequency converter adopts the control mode of main channel (485 communication setting) + auxiliary channel setting (ascending and descending control). The encoder controls the action of the side cutter and the calculation of the total length of the insulation cotton.

The encoder inputs the number of collected pulses to the high-speed counter X1 terminal of FX2N. PLC calculates the actual meter number according to the number of pulses and mechanical deceleration ratio, (n = 60 (D0) / NT * 1000) d0 is the pulse density. To control the action of side knife and display linear speed and total meter on the human-computer interface. Moreover, the length of sliver can be set according to the production requirements on the man-machine interface. In order to ensure that the sliver is cut by the side knife, the finished cotton is quickly transported back and rolled. Therefore, 5 Hz frequency should be added to the existing operating frequency at the moment of side knife action. In other words, there must be an additional speed function. The acceleration time lasts about 2S. The system has total start / stop function, and each transformer has individual micro rise / drop, separate start / stop, manual / automatic switching functions. The realization of the above functions depends on the powerful communication function of Tianlang Weichuang inverter and the unique frequency setting mode of main / auxiliary channels. Need to purchase Tianlang Weichuang frequency converter 485 module.

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