Delta Electronics VFD-E manual 01.13, 01.14

Chapter 4 Parameters

The Acceleration Time is used to determine the time required for the AC motor drive to ramp from 0 Hz to Maximum Output Frequency (Pr.01.00). The rate is linear unless S-Curve is “Enabled”; see Pr.01.17.

The Deceleration Time is used to determine the time required for the AC motor drive to decelerate from the Maximum Output Frequency (Pr.01.00) down to 0 Hz. The rate is linear unless S-Curve is “Enabled.”, see Pr.01.18.

The Acceleration/Deceleration Time 1, 2, 3, 4 are selected according to the Multi-function Input Terminals Settings. See Pr.04.05 to Pr.04.08 for more details.

In the diagram shown below, the Acceleration/Deceleration Time of the AC motor drive is the time between 0 Hz to Maximum Output Frequency (Pr.01.00). Suppose the Maximum Output Frequency is 60 Hz, Minimum Output Frequency (Pr.01.05) is 1.0 Hz, and Acceleration/Deceleration Time is 10 seconds. The actual time for the AC motor drive to accelerate from start-up to 60 Hz and to decelerate from 60Hz to 1.0Hz is in this case 9.83 seconds. ((60-1) * 10/60=9.83secs).

Frequency

01.00

Max. output Frequency

setting operation frequency

01.05

Min. output frequency

0 Hz
	Accel. Time
	01.09	01.11

Decel. Time

01.10 01.12

The definition of

Accel./Decel. Time

Time

Resulting		Resulting
Accel. Time		Decel. Time
	Resulting Accel./Decel. Time

01.13	Jog Acceleration Time		Unit: 0.1/0.01
	Settings	0.1 to 600.0/0.01 to 600.0 sec	Factory Setting: 1.0
01.14	Jog Deceleration Time		Unit: 0.1/0.01
	Settings	0.1 to 600.0/0.01 to 600.0 sec	Factory Setting: 1.0

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 4-45