This type of panel controls motor speed continuously, while a soft starter only ramps a motor up to full speed and then steps aside in the programming. Choose a VFD when the process needs ongoing speed or torque control, and choose a soft starter when you only need a gentle start.
Here are definitions based on the operative advantages of a VFD versus a soft starter:
- VFDs vary frequency and voltage throughout operation, giving full-range speed and torque control plus energy savings. Soft starters limit inrush current at startup only, then run the motor across the line at fixed speed.
- Cost and footprint favor soft starters for simple starting duty, while VFDs earn their cost where speed control adds process value.
Based on these parameters, you can decide which choice is right for your application. If a conveyor or pump needs adjustable speed, then a VFD fits; if a fixed-speed motor just needs a gentle start, then a soft starter is enough.
Matching the starting method to the duty cycle protects both the motor and your budget. We specify the right approach during design, alongside the power and relay work in our Electrical Control Panels.
