In elevator speed regulation, what adjustment modifies the response time of acceleration or slowdown?

• A. Voltage
• B. Torque
• C. Timing
• D. Current limit

Answer: (C)

Timing controls how quickly the speed command changes, i.e., the ramp rate of acceleration and deceleration. In elevator drive systems, the controller uses a ramp function to smoothly transition from standstill to operating speed and back down. By adjusting the timing, you change the response time: longer timing makes acceleration and slowdown slower and smoother (less jerk), while shorter timing makes them quicker. Voltage sets the available drive voltage and can affect top speed, but not the pace of the speed change itself. Torque is the motor’s ability to produce rotation, not the rate at which speed changes. Current limit protects the motor and caps torque, but doesn’t govern how fast the system ramps up or down. So, the setting that modifies the response time is the timing.