Quanzhou Ausenist Technology Co., Ltd Will Pipe Network Pressure Fluctuate Sharply During Pump Rotation Switch?
In the AU620 and its series of intelligent water pump systems, there is usually no significant pressure fluctuation in the pipe network at the moment of pump rotation switch.
The system ensures the smoothness of the switching process through the following core technical mechanisms:
1. Advanced PID Closed-Loop Algorithm
AU620 adopts a high-precision PID algorithm to monitor pipe network pressure in real time. During the pump rotation (alternation operation) process, the main drive will accurately adjust the output frequency of the put-in pump group through calculation according to the current pressure feedback, compensating for the instantaneous pressure change caused by pump start/stop.
2. Soft Start/Stop Function
All water pump drives in the system support the soft start function, which not only reduces the starting current but also avoids the "water hammer effect" and severe pressure surge caused by the traditional direct start method. When one pump exits and another pump is connected, the smooth rise and fall of frequency ensures the linear transition of water flow switching.
3. Pump Shift Delays Logic
To prevent water supply vacuum or overpressure caused by overlapping operation of dual pumps at the moment of multi-pump switching, AU620 provides special delay control parameters:
- Pump Adding Delay Time (U3-05): Set the waiting time before putting a new pump into operation, with a factory default value of 1.0 second.
- Pump Reducing Delay Time (U3-06): Set the lag time after an old pump exits operation, with a factory default value of 0.1 second.
These parameters cooperate with the master drive's real-time monitoring of auxiliary drive status to ensure logical consistency during pump group alternation.
4. Real-Time Communication Scheduling
All drives in the system are connected via RS485 communication cables, and the master drive sends PID instructions to slave drives in real time. This millisecond-level data interaction enables slave drives to quickly take over the pressure load of the master drive and maintain a constant pressure state.
Conclusion
Although the switching moment involves physical state changes, with correct parameter settings (such as U3-05/U3-06) and normal PID regulation, AU620 can control pressure fluctuations within an extremely small range, and users can hardly perceive the pressure change. If obvious fluctuations are found, the pressure stability can be further optimized by fine-tuning the integral coefficient (U3-21) or pump adding/reducing delays.