Soft starters are electronic devices used to gradually increase the voltage supplied to an electric motor during startup, reducing mechanical stress and inrush current.

Key Features:

• ✔ Reduces motor starting current (typically to 30–70% of full-load current)
• ✔ Minimizes torque spikes and mechanical wear
• ✔ Extends motor and equipment lifespan
• ✔ Smooth acceleration/deceleration control
• ✔ Compact and cost-effective compared to VFDs

How It Works:

Uses thyristors (SCRs) or triacs to phase-control the AC voltage applied to the motor. Voltage ramps up over a set time (e.g., 1–30 seconds), allowing soft start and stop.

Typical Applications:

Advantages vs. Direct-On-Line (DOL):