Delta Electronics AC Drive VFD-F Series Spezifikationen PDF herunterladen (Seite 67)

VFD-F Series

5-34

5.7 Group 6: Protection Function Parameters

06 - 00

Over-voltage Stall Prevention

Factory Setting: 390.0/780.0

Settings

230V series: 330.0 ~ 410.0VDC

460V series: 660.0 ~820.0VDC

00: Disable

 This parameter selects the voltage level for the Over-Voltage Stall Prevention function.

 During decelerations, the DC bus voltage may exceed its maximum allowable value due to motor

regeneration. When this function is enabled, the AC drive will stop decelerating and maintain a

constant output frequency. The AC drive will only resume deceleration when the voltage drops

below the preset value.

 With moderate inertial loads, the over-voltage stall prevention will not occur and the deceleration

time should be equal to Pr.1-10. With high inertial loads, the AC drive will automatically extend the

deceleration time due to the step function shown below. If the deceleration time is critical for the

application, then dynamic brake resistors should be used.

Output frequency Deceleration characteristic

when Over-voltage stall

prevention enabled

Frequency held

Deceleration Time

Time

06 - 01

Over-current Stall Prevention during Acceleration

Factory Setting: 120

Settings 20~150% Unit: 1

 This parameter selects the percentage of allowable over-current during acceleration before the stall

prevention is enabled.

 During acceleration, the AC drive output current may increase abruptly and exceed the value

specified by Pr.06-01 due to rapid acceleration or excessive load on the motor. When this function is

enabled, the AC drive will stop accelerating and maintain a constant output frequency. The AC drive

will only resume acceleration when the current drops below the value set in Pr.06-01 (please see the

graph below).

 When the over-current stall prevention is activated, the acceleration time of the AC drive will be

longer than the time set in Pr. 01-09.

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 189 190

Keine Kommentare

Delta Electronics AC Drive VFD-F Series Spezifikationen Seite 67