A frequency modulation starter has been added to the pump’s circuit – will this have an impact on the pump?
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In our facility, the current of the pumps is regulated by adjusting the outlet valves. However, the management decided that to reduce the workload, a frequency regulator was installed; with the valves kept open, the current increases gradually when the pump starts, so there’s no risk of overcurrent. But after installing the frequency regulator, the frequency might be too low, resulting in a very loud noise from the pump. I want to know if this will have any impact on the pump
If the adjustment frequency differs significantly from the rated value, it will affect the pump’s lifespan. Is the loud sound at lower frequencies coming from the motor or the pump?
Variable frequency drives that are not added also represent a form of energy-saving solution
Try adjusting the valve to see if there is any change in the sound
Frequency modulation is used to control the motor; it’s not clear what size the motor is. Generally, larger motors are equipped with radiators (small motors), and if frequency modulation affects these small motors with limited cooling capacity, the noise level will increase. I’m not sure whether the sound you’re referring to is that of the motor or the pump. If the pump isn’t in operation and the frequency isn’t extremely high, then in theory there shouldn’t be any significant change in the sound produced by the pump
If it is not an inverter-driven motor, a frequency below 30 Hz will affect the motor’s heat generation
First, it is necessary to determine whether the motor is variable-frequency; if not, a low frequency will result in poor heat dissipation!
The sound of the motor; the pump hasn’t moved
I’ve forgotten the specific figures; I know that the rated current is 84.7A
No change; after adding the frequency converter, it has little to do with the outlet, and the pump operates at the set frequency