There are many types of pressure washers currently produced in China, and most of them are equipped with variable frequency control automatic cutting trowels. One of the machines in a Caigang production plant used the domestic SJ inverter, and the latter was replaced by the general-purpose PI9100 series current vector inverter.
Brief description of production process: equipment starter motor drives raw material color steel plate, press molding according to requirements, the length of finished color steel tile is collected by a pulse counter to PLC, PLC gives signal to control inverter start and stop, control boring tool complete precision cutting . The information such as the length and number of sheets of the product color steel tile is input to the PLC through the touch screen setting.
According to the on-site motor power, the general-purpose PI9100a004G3 current-type vector inverter is selected. The PLC automatic control system program is already available. According to the understanding of such machine technology, the control principle is known. The acceleration/deceleration time of the inverter is set to 3S and 1S respectively; the two-stage speed control is adopted, one full speed is 50Hz, and the second speed is 10Hz.
The frequency converter is installed in the electrical cabinet of the automatic control system of the tile machine. The PI9100a004G3 is compact and compact, which is convenient for users to install and use without occupying too much space.
Inverter wiring:
1, main terminal wiring: L1/L2/L3 is connected to three-phase 380V power supply, U/V/W is connected to the motor.
2, control terminal wiring:
DI1, COM connected to the "forward" switch signal from the PLC, closed forward, open and stop.
DI2, COM connected to the PLC "reverse" switch signal, closed reverse, open and stop.
DI5, COM connected to the "speed" signal from the PLC, close the second speed, disconnect the speed.
A faulty relay normally open signal is connected to the PLC between TA1 and TC1.
The corresponding parameter settings:
parameter | Set value | Explanation |
F0.02=1 | 1 | Terminal block control |
F0.03=6 | 6 | Multi-speed setting frequency |
F0.17=3 | 3 | acceleration time |
F0.18=1 | 1 | deceleration time |
FC.00=100 | 100 | One-speed 50Hz |
FC.01=20 | 20 | Two-stage speed 10Hz |
Conclusion: The on-site operation can fully meet the requirements of the production process. The general-purpose PI9000 series inverter can be used and promoted on the tile press.
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