Hitachi CP-X200 Instruction Manual page 100

Be aware that running the motor at a low speed for a long time can cause motor
overheating. This is particularly true when manual torque boost is ON, or if the motor
relies on a built-in fan for cooling.
Voltage gain – Using parameter A045 you can
modify the voltage gain of the inverter (see
graph at right). This is specified as a
percentage of the full scale output voltage.
The gain can be set from 20% to 100%. It
should be adjusted in accordance with the
motor specifications.
The following table shows the methods of
torque control selection.
Func. Name /
Code SRW Display
A041 Torque boost select
V-Bst Slct
A241 Torque boost select, 2
2VBst Slct
A042 Manual torque boost value
V-Bst V
A242 Manual torque boost value,
nd
2 motor
2VBst V
A043 Manual torque boost
frequency adjustment
M-Bst F
A243 Manual torque boost
frequency adjustment,
2nd motor
2MBst F
A044 V/f characteristic curve
CTRL
A244 V/f characteristic curve,
2nd motor
2CTRL
A045 V/f gain setting
V-Gain
A245 V/f gain setting,
2nd motor
2V-Gain
"A" Function
Two options:
00 Manual torque boost
MN
01 Automatic torque boost
nd
motor
MN
Can boost starting torque
between 0 and 20% above normal
0005.0%
V/f curve,
range is 0.0 to 20.0%
0005.0%
Sets the frequency of the V/f
breakpoint A in graph (top of
previous page) for torque boost,
0003.0%
range is 0.0 to 50.0%
0000.0%
Two available V/f curves;
00 Constant torque
C-TRQ
01 Reduced torque
06 Reduced torque1
C-TRQ
Sets voltage gain of the inverter,
00100% range is 20. to 100.%
00100%
V
100%
80%
0
Description
3 − 17
3 17
A045=100
A045=80
fbase fmax
Run Defaults
Mode
-FE -FU
Units
Edit (EU) (USA)
00 00 %
00 00 %
1.8 1.8 %
0.0 0.0 %
10.0 10.0 %
0.0 0.0 %
00 00
00 00
100. 100. %
100. 100. %