Current Limit (Stall Prevention) - Saftronics FP5 Series User Manual

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Chapter 3 - Programming Features
FP5/GP5 Operation
fc = carrier frequency
2.5kHz
1.0kHz
83.3Hz
n054 = "Synchronous 1"
fc = carrier frequency
2.5kHz
1.0kHz
27.7Hz
n054 = "Synchronous 3"

Current Limit (Stall Prevention)

This function automatically adjusts the output frequency in response to an
increase in load current to continue operation without tripping the
inverter.
· Stall Prevention Level During Acceleration (n073, StallP Accel Lvl)
The current limit level during acceleration can be set in units of 1%
(inverter rated current = 100%).
Factory setting: kVA dependent
A setting of 200% disables current limit during acceleration. During
acceleration, if the output current exceeds the value set for n073, accel-
eration stops and frequency is maintained. When the output current
goes down below the value set for parameter n073, acceleration
resumes at the normal acceleration rate.
52
fc = carrier frequency
2.5kHz
1.0kHz
fc = 12 fout
fout
208.3Hz
fc = 36 fout
fout
69.4Hz
Figure 19 Custom Setting of Carrier Frequency Patterns
fc = 24 fout
fout
41.6Hz 104.1Hz
n054 = "Synchronous 2"
FP5/GP5 User's Manual