De-sta-co F5-B AC Inverter Drive Manuel d'utilisateur télécharger pdf (Page 37)

In the lower speed range losses in the motor become greater. This

parameter can be used to boost the voltage in order to overcome these

losses. With proper adjustment, the torque output of the motor will remain

constant even at the lowest speeds.

Adjustment range: 0.0...25.5 %

Resolution: 0.1 %

Factory setting: 5.0 %

Adjustment:

1) Determine the load level (CP.3) with no-load operation at the

rated frequency.

2) Then run at about 10 Hz and adjust the torque boost, so

that about the same load level (CP.3) is achieved as with the

rated frequency.

During continuous operation; if the motor operates at low speed

and too much voltage, it can lead to overheating of the motor.

The parameter determines the time needed to accelerate from 0 Hz to

100 Hz. The actual acceleration time is proportional to the frequency

change (delta f).

100 Hz

–––––– x actual acceleration time = CP.7

delta f

Adjustment range: 0.00...300.00 s

Resolution: 0.01 s

Factory setting: 0.15 s

Example: actual acceleration time = 5s; the drive should accelerate from

10 Hz to 60 Hz, delta f = 60 Hz - 10 Hz = 50 Hz

CP.7 = (100 Hz / 50 Hz) x 5 s = 10 s

Adjustment of the Drive

Boost

Acceleration time

100 Hz

CP. 7

Deceleration time

The parameter determines the time needed to decelerate from 100 Hz to

0 Hz. The actual deceleration time is proportional to the frequency change

(delta f).

100 Hz

–––––– x actual deceleration time = CP.8

delta f

CP.6

CP.5

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De-sta-co F5-B AC Inverter Drive Manuel d'utilisateur Page 37