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Motor characteristics (F10)
F10 selects the cooling mechanism of the motor-- shaft-driven or separately powered cooling
fan.
Data for F10
Function
1
For a general-purpose motor and Fuji standard permanent magnet synchronous
motor with shaft-driven cooling fan.
(The cooling effect will decrease in low frequency operation.)
2
For an inverter-driven motor with separately powered cooling fan.
(The cooling effect will be kept constant regardless of the output frequency.)
The figure below shows operating characteristics of the electronic thermal overload protection
when F10 = 1. The characteristic factors
α
1 through
α
3 as well as their corresponding
switching frequencies f
2
and f
3
vary with the characteristics of the motor.
The tables below list the factors determined by the motor capacity (P02) and the motor
characteristics (P99).
Cooling Characteristics of Motor with Shaft-driven Cooling Fan
Nominal Applied Motor and Characteristic Factors when P99 (Motor 1 selection) = 0 or 4
Output frequency for
motor characteristic factor
Characteristic
factor
Nominal
applied motor
(kW)
Thermal time
constant
τ
(Factory default)
Reference current
for setting the
thermal time
constant (Imax)
f2 f3
α
1
α
2
α
3
0.1 to 0.75
75%
85% 100%
1.5 to 4.0
7 Hz
85%
85% 100%
5.5 to 11
6 Hz
90%
95% 100%
15 7
Hz
85%
85% 100%
18.5, 22
5 min
5 Hz
5 Hz
92% 100% 100%
30 10
min
Allowable
continuous current
×
150%
Base
frequency
×
33%
Base
frequency
×
33%
54%
85% 90%