Derating For High Switching Frequency; Vibration And Shock; Air Humidity; Efficiency - Danfoss FCM305 56 Instruction Manual

Derating for High Switching Frequency

The FCM 300 Series motor can use two different
PWM schemes, SFAVM and 60° AVM. Factory
setting is SFAVM. The PWM scheme can be
changed in parameter 446. Below 25 Hz motor
speed the FCM 300 Series motor automatically
change to SFAVM.
Factory setting of the switching frequency is
4000 Hz. It can be changed between 2 and 14 kHz
in parameter 411.
A higher switching frequency leads to a quieter
running unit but higher losses in the electronics of
the FCM 300 and makes an appropriate derating
necessary.

Vibration and Shock

FCM 300 Series has been tested according to a
procedure based on the following standards:
IEC 68-2-6: Vibration (sinusoidal) - 1970
IEC 68-2-34: Random vibration broad-band
- general requirements
IEC 68-2-35: Random vibration broad-band
- high reproducibility
IEC 68-2-36: Random vibration broad-band
- medium reproducibility
FCM 300 Series complies with requirements that
correspond to conditions in the standards
mentioned above.

Air Humidity

FCM 300 Series has been designed to meet the IEC
68-2-3 standard, EN 50178 item 9.4.2.2/DIN
40040, class E, at 40°C/104
MG.03.B6.2G - VLT is a registered Danfoss trademark
o
F.
FCM 300 Series

Efficiency

2 pole
4 pole
18-3