Omron M1 Series User Manual page 352

5 Basic Settings
• The following shows each factor that is set according to the motor characteristics selected by
motor capacity and motor type (induction motor/PM motor).
(Induction motor (IM))
Motor ca-
pacity
0.4, 0.75 kw
1.5 to 3.7 kW
5.5 to 11 kW
15 kw
18.5, 22 kW
30 to 45 kW
55 to 90 kW
110 kw min.
(Synchronous motor (PM))
Motor ca-
pacity
0.2 to 22 kW
30 to 45 kW
55 to 90 kW
110 kw min.
 When Motor Electronic Thermal Characteristic Selection (F10/A06) = 2: For
an inverter-driven motor non-ventilated motor or motor with separately
powered cooling fan
• The operation level is a constant value without decrease that is set at Motor Electronic Thermal
Level (F11/A07) as there is no drop in the cooling effectiveness by output frequency.
5-22
Actual operation level
1st Motor Electronic Thermal Level (F11)
100
α3
α2
α1
0 f
2
Thermal Thermal time con-
time con- stant setting refer-
stant t (fac- ence current value
tory default) Imax
5 min
Continuous allowa-
ble current value ×
150%
10 min
Thermal Thermal time con-
time con- stant setting refer-
stant t (fac- ence current value
tory default) Imax
5 min
Continuous allowa-
ble current value ×
150%
10 min
(%)
f = Base frequency
b
However, f = 60 Hz
b
if the base frequency is 60 Hz or higher.
Output frequency
f (Hz)
0
f f
3 b
Characterization factor
switching frequency
f
2
7 Hz
6 Hz
5 Hz
7 Hz
5 Hz
Base fre- Base fre-
quency × quency ×
33% 83%
Characterization factor
switching frequency
f
2
Base fre-
quency ×
Base fre-
33%
quency ×
Base fre-
33%
quency ×
83%
M1 Series Standard Type User's Manual (I669)
Characterization fac-
tor
f
α1 α2 α3
3
75% 85% 100%
85% 85% 100%
90% 95% 100%
85% 85% 100%
100
92% 100%
%
54% 85% 95%
51% 95% 95%
53% 85% 90%
Characterization fac-
tor
f
α1 α2 α3
3
69% 90% 90%
54% 85% 95%
51% 95% 95%
53% 85% 90%