What is the term used to identify the speed change in Segment 1 of a typical speed profile?

• A. Speed ramp-up
• B. Constant speed
• C. Speed ramp-down
• D. Stop

Answer: (A)

The speed change in Segment 1 is a speed ramp-up. This segment represents the motor accelerating from a lower speed (often from zero) toward the desired operating speed in a controlled, gradual way. Using a ramp-up helps limit jerk, torque spikes, and motor current, protecting the drive and the mechanical system while smoothly reaching the target speed. The other terms describe different parts of a profile: constant speed means speed stays the same with no change, ramp-down is a deceleration phase, and stop is the final halt. So Segment 1 being an upward change specifically fits ramp-up.