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CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Range
[Factory Setting]
Parameter Unit Description / Notes
P297
(1)
2.5 to 15.0
Switching [ 5 kHz ]
Frequency 0.1 kHz
For the 15.2 A
model the factory
adjustment is
[2.5 kHz]
Defines the switching frequency of the IGBTs in the
inveter.
The switching frequency is a comprimise between the
motor acoustic noise level and the inverters IGBTs
losses. Higher switching frequencies cause lower mo-
tor acoustic noise level, but increase the IGBTs losses,
increasing the drive components temperature and thus
reducing their useful life.
The predominant frequency on the motor is twice the
switching frequency setat P297.
Thus, P297 = 5 kHz results in an audible motor noise
corresponding to 10 kHz. This is due to the used PWM
technique .
The reduction of the switching frequency also contributes
to the reduction of instability and ressonance that may
occur in certain application conditions, as well as reduces
the emission of electromagnetic energy by the inverter.
The reduction of the switching frequencies also reduces
the leakage currents to ground.
Use currents according to table below:
P300 0.0 to 15.0
DC Braking [ 0.0 ]
Time 0.1 s
P301 0.0 to 15.0
DC Braking [ 1.0 ]
Start Frequency 0.1 Hz
P302 0.0 to 100
Braking Torque [ 50.0 ]
0.1 %
The DC braking feature provides a motor fast stop via
DC current injection.
The applied DC braking current, that is proportional to
the braking torque, is set at P302.
The figures below show the DC branking operation at
the two possible conditions: ramp disabling and general
disabling.
Table 6.15 - Current values for values of P297
Inverter
Model / P297
2.5
kHz
2.5 kHz a
5.0 kHz
5.1 kHz a
10.0 kHz
10.1 kHz a
15.0 kHz
CFW100016 1.6 A 1.6 A 1.6 A 1.6 A
CFW100026 2.6 A 2.6 A 2.6 A 2.1 A
CFW100040 4.0 A 4.0 A 4.0 A 3.4 A
CFW100073 7.3 A 7.3 A 6.8 A 6.3 A
CFW100100 10.0 A 10.0 A 9.5 A 9.0 A
CFW100152 15.2 A 14.0 A 12.0 A 10.0 A
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