FCM 300 Series
87
MG.03.B6.02 - VLT is a registered Danfoss trademark
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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 FC motor and makes an appropriate derating
necessary.
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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.
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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.
Special conditions
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Efficiency
4 pole
2 pole
