Chapter 4 Software Index
4-42
00-01 B C
0 / 9 7.5% 4.5%
1 / 10 10.0% 7.0%
2 11.0% 8.5%
3 12.0% 9.5%
4 17.5% 4.0%
5 25.0% 5.0%
11 11.0% 8.0%
12 12.0% 9.0%
13 20.5% 7.0%
14 28.5% 8.0%
6 / 15 45.0% 1.0%
7 / 16 55.0% 1.0%
8 / 17 65.0% 1.0%
3. The inverter will output the value of B, C voltage (refer to 00-01) plus the 05-00 V/F pattern
setting. The starting torque will be raised as shown.
Note: ※ 05-00=0, Torque boost function is invalid
4. When the induction motor is in running, there must be slip due to the load. It is necessary to boost
voltage to improve the precision of the speed.
Output Current-(05-01) Note : 06-01=motor rated current
Slip frequency boost =
(06-01)-(05-01)
× (05-02)
05-01=motor no load current
05-02 approximate
value=
(Motor synchronization speed– Rated speed) / Motor synchronization speed
Marked on the motor nameplate
120
Motor synchronization speed (RPM)=
Motor Poles
× Motor rated frequency (50Hz or 60Hz)
120
Example: 4 Poles,60Hzinduction motor synchronization speed =
4
× 60=1800 RPM
※ Note: Motor no load current (05-01) differs with the inverter capacities (12-00) (Refer to 06-01
note). It should be regulated according to actual conditions.
B
100%
Voltage
05-00
1
2.5/3.
50/6
Hz
Figure 4-25 V/F curve with torque boost
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