Hitachi S1-00073HFE - Page 113

S1 series standard inverter
-108-
Function
code
Name
Detailed parameter description
Default
value
Modify
motoring via
keypad
P03.21
Set upper limit of
brake torque via
keypad
180.0%
○
P03.22
Flux-weakening
coefficient of
constant-power
zone
Used when asynchronous motor is in
flux-weakening control.
T
f
0.1
Flux-weakening
coefficient of motor
1.0
2.0
Min. flux-weakening limit of motor
P03.22 and P03.23 are valid during constant
power. When motor speed is above rated speed,
motor enters flux-weakening running state. The
flux-weakening control coefficient can change the
flux-weakening curvature, the larger the
coefficient, the steeper the curve, the smaller the
coefficient, the smoother the curve.
Setting range of P03.22: 0.1–2.0
Setting range of P03.23: 10%–100%
0.3
○
P03.23
Min.
flux-weakening
point of
constant-power
zone
20%
○
P03.24
Max. voltage limit
P03.24 sets the maximum output voltage of the
inverter, which is the percentage of rated motor
voltage. This value should be set according to
field conditions.
Setting range:0.0–120.0%
100.0%
○
P03.25
Pre-exciting time
Carry out motor pre-exciting during starting to
build a magnetic field inside the motor to improve
the torque characteristics of motor during starting.
Setting range: 0.000–10.000s
0.300s
○
P03.26
Flux-weakening
proportional gain
0–8000
1000
○
P03.27
Vector control
speed display
0: Display as per actual value
1: Display as per the set value
0
○
P03.28
Static friction
compensation
0.0–100.0%
0.0%
○