Under what circumstances is it necessary to equip a pump with variable frequency control?
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This post was last edited by yiyuguchen on 2018-6-22 at 10:50. Under what circumstances is it necessary to equip a pump with variable frequency control? What are the benefits of setting variable frequency for process operation? Could you list some specific industrial examples? If a variable-frequency pump is not used, how can the flow rate at the pump outlet be adjusted?
Processes with frequent load changes require variable-frequency motors, which are primarily used to save energy.
When the operating conditions vary significantly and the load on the pump changes greatly, variable frequency drive can be considered. The main purpose is to save electricity.
1. It is necessary to adjust the flow rate through frequency conversion or similar methods； 2. To save electricity
Your device has a high degree of design flexibility, allowing for reduced energy consumption under different loads; variable frequency control could be considered!
If variable frequency isn’t available, use a control valve; if there’s no control valve, then adjust the pump outlet valve.
Pumps require variable frequency control, usually due to process requirements, in order to maintain stable system pressure. Through the electromagnetic flow meter installed on the pipeline, feedback is sent automatically to the PLC; when the system pressure changes, commands are sent to the pump control electric valve to automatically adjust its opening degree, thereby ensuring that the system pressure remains constant.
The main advantage of frequency converters is power savings (this applies when you have frequency-driven motors; if it’s not a frequency-driven motor, it’s not advisable to set the frequency too low). In many cases, a centrifugal pump can have its flow rate adjusted by reducing the outlet valve, while volumetric pumps use bypass lines to adjust the flow rate.
The role of frequency converters in chemical production: power saving, process stabilization, and easier operation.
It seems that using an inverter is still the better choice, right?
It is not recommended to adjust the pump flow rate by means of frequency conversion, as this may cause the pump to operate at low efficiency, and the lubrication system may be put under severe strain