Search With Minimum Output Frequency Upward Timing Chart; Current Limit For Speed Search - Delta Electronics AC Motor Drive VFD-VE Series User Manual

Chapter 4 Parameters|
Output frequency
Output voltage
07-09 Current Limit
for Speed Search Speed
Output frequency(H)
Output voltage(V)
Output current
06-03
Over-Current Stall
Prevention
during Accel.
FWD Run
B.B. Search with minimum output frequency upward timing chart

Current Limit for Speed Search

07-09
Control
VF VFPG
mode
Settings
Following a momentary power loss, the AC motor drive will start its speed search operation
only if the output current is greater than the value set by Pr.8-07. When the output current is
less than the value of Pr.8-07, the AC motor drive output frequency is at "speed
synchronization point". The drive will start to accelerate or decelerate back to the operating
frequency at which it was running prior to the power loss.
When executing speed search, the V/f curve is operated by group 1 setting. The maximum
current for the optimum accel./decel. and start speed search is set by Pr.07-09.
4-110
(H)
(V)
output current A
FWD Run
B.B.
B.B. Search with minimum output frequency upward timing chart
A
B.B.
SVC FOCPG TQRPG
20 to 200%
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time 08.07
Speed Search
Synchronization speed detection
Time
Input B.B. signal
Stop voltage output
Disable B.B. signal
Waiting time Pr.07-08
Speed search
Synchronization speed detection
Time
Factory Setting: 150
Revision August 2008, 03VE, SW V2.04
Unit: 1