Delta Electronics VFD-L Series Spezifikationen PDF herunterladen (Seite 32)

VFD-M Series

5-6

 Pr.10. This parameter is used to determine the time required for the AC drive to ramp

from 0 Hz to its Maximum Output Frequency (Pr.03). The rate is linear unless the

S-Curve (Pr.14) is “Enabled”.

 Pr.11. This parameter is used to determine the time required for the AC drive to

decelerate from the Maximum Output Frequency (Pr.03) down to 0 Hz. The rate is linear

unless the S-Curve (Pr.14) is “Enabled”.

 Pr.12 and Pr.13: Provide an additional Accel/Decel time although Time 1 is the default. A

Multi-Function input terminal must be programmed to select Accel/ or Decel/ Time 2 and

the terminal must be closed to select Accel/Decel Time 2 (See Pr.38 to Pr.42).

 In the below diagram, suppose the Maximum Output Frequency is 60 Hz (Master Freq),

Minimum Output Frequency (start-up) is 1.0 Hz, and accel/decel time 1 is 10 seconds.

The actual time for the AC drive to accelerate from start-up to 60 Hz is 9.83 seconds

(deceleration time is also 9.83 seconds), can be determined by the formula.

Actual Acceleration/Deceleration Time=

Acceleration/Deceleration Time x(Master Freq.-Min.Output Freq.)

Max. Output Freq.

Frequency

Max.

Output

Freq.

Pr.10

Pr. 12

Pr.11

Pr. 13

Time

Deceleration Time

Acceleration Time

Pr.14

Acceleration S-Curve Factory Setting: 00

Settings 00 to 07

 This parameter is used whenever the motor load needs to be accelerated or decelerated

smoothly. The desired accel/decel effect is selectable from 0 to 7, in which the larger the

number, the greater the effect achieved. If the default value of Pr.111 Deceleration S

Curve is unchanged (“0”), then Pr.14 sets both acceleration and deceleration S-Curves. If

Pr.111 is set to any value other than “0”, then Pr.14 will set the acceleration S-Curve and

Pr.111 will set the deceleration S-Curve.

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Delta Electronics VFD-L Series Spezifikationen Seite 32