A VFD panel saves energy by slowing a motor to match real demand instead of running full speed and throttling the output. On centrifugal pumps and fans, modest speed reductions can cut energy use sharply because the power required follows roughly the cube of speed.
Major energy savings on variable-torque loads can be realized:
- Affinity laws govern centrifugal loads: required power drops with roughly the cube of speed, so trimming speed meaningfully lowers draw.
- Soft starting removes the inrush current of across-the-line starts, reducing demand charges and mechanical shock.
- Closed-loop control holds setpoint with a PID loop, so the drive delivers only the speed the process needs.
Did you know that if a pump runs throttled against a valve, then replacing that restriction with VFD speed control removes the wasted energy? The biggest savings show up on pumps and fans that rarely need full output. We engineer that efficiency into fluid systems through our Pump Control Panels.
