How a pool pump works

Pool pumps are typically centrifugal pumps and serve as the driving force behind the pool's water circulation and filtration system.
Pump performance is primarily measured by parameters such as head (H, in meters), flow rate (Q, in cubic meters per hour or liters per second), and power (N); the relationships between these parameters are illustrated by the pump's characteristic curves.
With technological advancements, variable-frequency technology has been applied to pool pumps. By adjusting the power supply frequency, the variable-frequency drive alters the rotational speed of the motor and impeller, enabling precise, stepless regulation of flow rate and head. Compared to traditional fixed-speed pumps, variable-frequency pumps can adjust their output to avoid energy waste, thereby achieving high efficiency and significant energy savings (ranging from 30% to 90%).