Electric Motors Archives

What is Safe Torque Off? The LED Controls guide to STO

by Paul Neafcy | Oct 23, 2025 | ABB, Complete Guide, Danfoss, Electric Motors, TECO, variable speed drives

Safe Torque Off is a safety feature built into many Variable Speed Drives (VSDs) and servo drives. It prevents the motor from generating torque – which means it can’t turn – even if it’s still powered. When STO is active, the drive’s...

What is a Variable Speed Drive?

by Paul Neafcy | Jul 22, 2025 | ABB, Danfoss, Electric Motors, variable speed drives

What do Variable Speed Drives do? A Variable Speed Drive (VSD) controls the speed and torque (spin force) of an electric motor. Instead of running at full power all the time, a VSD adjusts motor speed as needed. What’s the difference between a Variable Speed...

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What is Safe Torque Off? The LED Controls guide to STO

What is a Variable Speed Drive?

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