Motor Starting Methods: Soft Starters

In this episode of the ABB Solutions Podcast, host Mike Murphy continues the motor starting methods series with a closer look at soft starters. Joined by Brion Flaningam, ABB Drives Technical Instructor, the conversation explores how soft starters regulate voltage, reduce inrush current, and provide a smoother alternative to traditional motor starting methods.

Building on the fundamentals from the previous episode, this discussion highlights when soft starters are the right choice and how they compare to both full voltage starters and variable frequency drives.

Tune in to hear insights on:

• What Is a Soft Starter: How soft starters use SCRs (thyristors) to gradually ramp voltage up and down during motor startup
• Voltage vs. Speed Control: Why soft starters control voltage—not speed—and what that means for your application
• Inrush Current Reduction: How soft starters minimize the high current spikes seen in direct online starting
• Soft Starter vs. VFD: Key differences in cost, functionality, and when each solution makes sense
• Bypass Contactors Explained: How bypass systems reduce wear and improve efficiency once the motor reaches full speed
• Application Use Cases: Where soft starters work best, including conveyors, escalators, and simple applications where only startup control is needed
• Advantages & Limitations: Lower cost and reduced mechanical stress vs. limited control over speed

References

If you would like to attend a training, head over to our U.S. Drives & PAC Automation Solutions Training page.  

Interested in learning more about ABB Drives? Join our Tech Tuesday webinars where our experts tackle topics from improving efficiency and reliability to solving maintenance issues.

Podcast 1 — Introduction to Motor Starting Methods – foundational overview of motor types and starting methods: https://www.buzzsprout.com/1770390/episodes/18739876-introduction-to-motor-starting-methods.mp3?download=true

Podcast 2 — Business Strategy – strategic planning fundamentals to support long-term success: https://www.buzzsprout.com/1770390/episodes/17631204

Podcast 3: Training with ABB Project Management – defining scope, scheduling, and resources for project success: https://www.buzzsprout.com/1770390/episodes/15697913

Podcast 4 — Setting and Achieving Goals – creating clarity, ownership, and direction in personal and professional growth: https://www.buzzsprout.com/1770390/episodes/17963852

Podcast 5 — Focus & Productivity – building habits and structure to stay consistent and avoid burnout: https://www.buzzsprout.com/1770390/episodes/18125609

Podcast 6 —Teambuilding – strengthening alignment, roles, and collaboration for high-performing teams: https://www.buzzsprout.com/1770390/episodes/17267078