Torque Boost Function - Omron 3G3MX2 Quick Start Manual

PROGRAMMING MX2
This table shows the details about the Free V/F control
Parameter Parameter Name
b100 Free-setting V/F freq(1)
b101 Free-setting V/F volt (1)
b102 Free-setting V/F freq(2)
b103 Free-setting V/F volt (2)
b104 Free-setting V/F freq(3)
b105 Free-setting V/F volt (3)
b106 Free-setting V/F freq(4)
b107 Free-setting V/F volt (4)
b108 Free-setting V/F freq(5)
b109 Free-setting V/F volt (5)
b110 Free-setting V/F freq(6)
b111 Free-setting V/F volt (6)
b112 Free-setting V/F freq(7)
b113 Free-setting V/F volt (7)

3.10 Torque boost function

Manual torque boost - Constant and Vairable torque algorithms
feature and asjustable torque boost curve that could help during
the startup of load with very big inertia or friction. On those cases
it may be necessary to increase the low frequency starting torque
characteristic by boosting the voltage above the normal V/F ratio.
Basically it attempsts to compensate for voltage drop in the motor
primary winding in the low speed range.
Be aware that running the motor at a low speed for a long time can
cause motor overheating and this is particularly true when manual
torque boost is activated and motor doesn't have force ventilation.
Automatic torque boost- Use the voltage compensation (A046)
and slip compensation (A047) to obtain a better performance under automatic torque boost mode (A041=01) ajusting the output
frequency and output voltage automatically depending on the load. The output voltage due automatic boost is added to the man-
ual torque boost voltage so both should be adjusted.
Parameter
A041
A042
A043
A044
A045
A046
A047
MX2 Quick Start Guide
Output voltage (V)
b113
b111
b109
b107
b101
b103,b105
0
b100 b102
Parameter Name
Torque boost select
Manual torque boost value
Manual torque boost frequency
V/f characteristic curve
V/f gain
Voltage compensation gain for auto-
matic torque boost
Slip compensation gain for auto-
matic torque boost
Diagram
b104 b106 b108 b110 b112
V
A042 = 5 (%)
100%
5% voltage
boost
(100%=A082)
0
A043
Description
Two options:
00... Manual torque boost
01... Automatic torque boost
Can boost starting torque between 0 and 20% above normal
V/f curve, range is 0.0 to 20.0%
Sets the frequency of the V/f breakpoint for torque boost,
range is 0.0 to 50.0%
00... Constant torque
01... Reduced torque (1.7)
02... Free V/F
03... Sensorless vector (SLV)
Sets voltage gain of the inverter, range is 20. to 100.%
Sets voltage compensation gain under automatic torque boost,
range is 0. to 255.
Sets slip compensation gain under automatic torque boost,
range is 0. to 255.
Range
0 to b102(Hz)
0.0 to 800.0(V)
b100 to b104(Hz)
0.0 to 800.0(V)
b102 to b106(Hz)
0.0 to 800.0(V)
b104 to b108(Hz)
0.0 to 800.0(V)
b106 to b110(Hz)
0.0 to 800.0(V)
b108 to b112(Hz)
Output freq.(Hz)
0.0 to 800.0(V)
0 to 400.0(Hz)
0.0 to 800.0(V)
A
fbase =
1.8 Hz 30 Hz
60 Hz
= 3 (%)
Hz
23