Chapter 10. Advanced Functions
10-7
P41 : Enter the pole number on the Motor nameplate.
P42 : Enter the slip frequency in accordance with the following formula and motor nameplate.
⎟
⎠
⎞
⎜
⎝
⎛
×
−
=
120
P
rpm
f
f
r
s
where,
s
f
= rated slip frequency
r
f
= rated frequency
rpm
= motor rated rpm
P
= motor pole number
i.e.) rated freq. : 60Hz, rated rpm: 1740rpm, poles: 4
Motor function codes per motor type are summarized as follows. Enter motor parameter if any change is
required.
z
Factory defaults per motor type
Motor type [kW]
Rated current [A]
No load current [A]
Rated slip frequency [Hz]
0.1 0.6
0.4
2.0
0.2 1.1
0.7
2.33
0.4 1.8
1.2
3.00
P43: Enter the motor nameplate rated current.
P44: Enter the measured current when the motor is running at rated frequency after the load is removed.
Enter 50% of the rated motor current when it is difficult to measure the motor no load current.
Induction motor has a large difference between motor rated rpm and frequency(synchronous speed)
depending on load rate. Therefore, it is recommended to use slip compensation control to reduce the
difference.
Set torque boost within 2% for slip compensation operation. Excessive torque boost may cause a huge
error in slip speed because motor may get overexcitation in low speed.
Synchronous
speed
Motor rated
RPM
RPM
Load
Slip
compensation
Hz
f
s
2
120
4
1740
60
=
⎟
⎠
⎞
⎜
⎝
⎛
×
−
=
Summary of Contents for SV-iE5 Series
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