LS ELECTRIC LSLV-H100 Series, User Manual

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Learning Protection Features
314
6.1.4 Stall Prevention and Flux Braking
The stall prevention function is a protective function that prevents motors from stalling due
to overloads. If a motor stall occurs due to an overload, the inverter operation frequency is
adjusted automatically. When a stall is caused by overload, high currents induced in the
motor may cause motor overheating or damage the motor and interrupt operation of the
motor-driven devices.
In this case, the motor decelerates with optimum deceleration without a braking resistor by
using flux braking. If the deceleration time is too short, an over voltage fault trip may occur
because of regenerative energy from the motor. The flux braking makes the motor use
regenerate energy, therefore optimum deceleration is available without over voltage fault
trip.
To protect the motor from overload faults, the inverter output frequency is adjusted
automatically, based on the size of load.
Group Code Name LCD Display Parameter Setting Setting range Unit
PRT
50
Stall prevention
and flux braking
Stall Prevent 0100 - bit
51 Stall frequency 1 Stall Freq 1 60.00
Start Freq
–
Stall Freq 1
Hz
52 Stall level 1 Stall Level 1 130 30
–150
%
53 Stall frequency 2 Stall Freq 2 60.00
Stall Freq 1
–
Stall Freq 3
Hz
54 Stall level 2 Stall Level 2 130 30
–150
%
55 Stall frequency 3 Stall Freq 3 60.00
Stall Freq 2
–
Stall Freq 4
Hz
56 Stall level 3 Stall Level 3 130 30
–150
%
57 Stall frequency 4 Stall Freq 4 60.00
Stall Freq 3
–
Max Freq
Hz
58 Stall level 4 Stall Level 4 130 30
–150
%
59 Flux Braking Gain Flux Brake kp 0
0.75-
90kW
0
–150
-
110-
500kW
0
–10
OUT
31
–35 Multi-function relay
1
–5 item
Relay 1
–5
9 Stall - -
36
Multi-function
output 1 item
Q1 Define