User guide
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V 1.0.1
2021-01-27
REF-AIRCON-C302A-IM564 user guide
Air conditioner application reference design kits
System performance
Normally it is recommended to set a value higher than motor maximum peak current (maximum RMS current *
1.414) in “Overcurrent Trip Level for Internal GateKill Comparator,” with a reserve of at least a 20% margin. Or
set 70~90% of the motor demagnetization current for the OCP threshold.
Figure 32 shows the OCP test result of REF-AIRCON-C302A-IM564:
-
Set OCP threshold (
MtrI
trip1
) to 10 A in MCEWizard, program parameters to MCE
-
Run motor to high speed and high load
-
Overcurrent protection occurs at about 11 A peak motor current; GK fault reports and motor stops.
Figure 32
Motor OCP by internal Gatekill comparator
CH2: V
dc
CH3: I
V
CH4: I
U
