How to adjust the pressure of water pump inverter

How to adjust the pressure of water pump inverter

Steps for adjusting the pressure of the water pump inverter: 1. Open the PID closed-loop control; 2. Connect the pressure closed-loop; 3. Set the pressure feedback and set the given pressure;

Changing the speed of the water pump can change the water outlet pressure. Adjust the operating frequency of the inverter. The higher the frequency, the higher the pump speed and the higher the pressure. The operation method of the inverter can only be found in the manual.

Let’s talk about how the frequency converter achieves constant voltage?

The frequency converter is also the core equipment of constant pressure control. For the frequency converter, either a PID adjustment unit is built in, or an intelligent PID controller must be installed to achieve constant pressure control. The PID controller consists of three units: proportional, integral, and differential. These three parameters are mainly set by the PID controller. The PID controller adjusts the deviation of the entire system according to the PID control principle, so that the actual value and the numerical value required by the process can be kept consistent. Simply put, the controller collects data and compares it with the reference value, and then the deviation is used to calculate the new input value. The purpose of this new input value is to keep the system data at the reference value. It is not that the actual value is equal to the reference value, but it is kept near the reference value. This balance can only be said to be a dynamic balance.

To provide data collection for the PID controller, an analog instrument, namely a pressure transmitter, must be used. The pressure transmitter plays the role of detection and transmission in the closed-loop regulation system. Detect the pressure, and then convert the detected pressure into a current signal to the frequency converter. Then the frequency converter directly receives the analog signal from the transmitter for PID control. Once the pressure changes, the output frequency of the frequency converter also changes, thereby changing the speed of the motor, thus achieving the goal of stabilizing the pressure.

In general, the constant pressure control method of the water pump outlet is adopted, and the pressure transmitter is installed at the water pump outlet. This can well reflect the real-time changes in water pressure and make the control effect of the closed-loop regulation system better.

How to debug the water pump inverter

A water pump is a small machine that can increase the pressure of liquid. It is generally used to increase the pressure of water in life, such as domestic water, fish pond water, etc. However, many people are not very clear about the use of water pumps. So, the following editor will take you to understand how to debug the water pump inverter and what to pay attention to when using the inverter for the submersible pump.

How to debug the water pump inverter:

First, turn on the PID closed loop control of the water pump inverter, then connect the pressure closed loop, and finally set the given pressure. As long as the speed of the water pump is changed, the pressure of the water outlet can be changed. However, before debugging the water pump inverter, you must first do the pre-power-on preparation work, such as checking whether the wiring and wiring of the inverter are correct and firm, etc.

What should be paid attention to when using a frequency converter for a submersible pump:

1. Compared with ordinary pumps, submersible pumps have heavier loads and the rated flow rate of the motor they use is also larger. Therefore, when choosing a frequency converter for this type of water pump, you must choose it according to the rated flow rate of the motor it uses, and you cannot just match it according to its power.

2. When installing the submersible pump inverter, pay attention to the installation environment. If the environment is relatively humid, moisture-proof measures must be taken.

3. Usually, submersible pumps are placed at a depth of about 100 meters, which is a certain distance from the inverter. Therefore, when using the inverter, pay attention to the thickness of the cable diameter. If the diameter is too thin, it is easy to accelerate the speed of line loss.

4. The submersible pump using the inverter must be regularly inspected and maintained to see if there are any aging, leakage, etc. For occasions where power cannot be cut off, emergency measures must be taken before maintenance and cleaning.