LSIS LSLV-G100 - Stall Prevention and Flux Braking

6.1.3 Stall Prevention and Flux Braking
The stall prevention function is a protective function that prevents motor stall caused
by overloads. If a motor stall occurs due to an overload, the inverter operation
frequency is adjusted automatically. When stall is caused by overload, high currents
are induced in the motor may cause motor overheat or damage the motor and
interrupt operation of the motor-driven devices.
Flux braking is used to gain the optimum deceleration time without the braking
resistance. If the deceleration time is too short, over voltage trip may occur due to the
regeneration energy from the motor. When using flux braking, ideal deceleration time
may be gained without over voltage trip because regenerative energy is expended at
the motor. Flux braking stops operating when the control mode is IM Sensorless.
Group
Code
Name
Setting
Setting Range
Unit
Pr
50
Stall prevention motion and flux
braking
0000*
-
bit
51
Stall frequency 1
60.00
Start frequency–
Stall Freq 1
Hz
52
Stall level 1
180
30–250
%
53
Stall frequency 2
60.00
Stall Freq 1–Stall Freq
3
Hz
54
Stall level 2
180
30–250
%
55
Stall frequency 3
60.00
Stall Freq 2–Stall Freq
4
Hz
56
Stall level 3
180
30–250
%
57
Stall frequency 4
60.00
Stall Freq 3–Maximum
frequency
Hz
58
Stall level 4
180
30–250
%
OU
31
Multi-function relay 1 item
9
Stall
-
-
33
Multi-function relay 2 item
* Displayed as on the Keypad.
Stall Prevention Function and Flux Braking Setting Details
Code and
Features
Description