2.3.3 FC 360 Control Principle
FC 360 is a general-purpose frequency converter for variable speed applications. The control principle is based on voltage
vector control
+
.
0.37–22 kW
FC 360 0.37–22 kW frequency converters can handle asynchronous motors and permanent magnet synchronous motors up
to 22 kW.
The current-sensing principle in FC 360 0.37–22 kW frequency converters is based on the current measurement by a resistor
in the DC link. The ground fault protection and short circuit behavior are handled by the same resistor.
130BD974.10
L2 92
L1 91
L3 93
M
U 96
V 97
W 98
RFI switch
Inrush
R+
82
Load sharing -
88(-)
R-
81
Brake resistor
Load s
89(+)
Illustration 2.12 Control Diagram for FC 360 0.37–22 kW
30–75 kW
FC 360 30–75 kW frequency converters can handle asynchronous motors only.
The current-sensing principle in FC 360 30–75 kW frequency converters is based on the current measurement in the motor
phases.
The ground fault protection and short circuit behavior on FC 360 30–75 kW frequency converters are handled by the 3
current transducers in the motor phases.
Load sharing -
Load s
L2 92
L1 91
L3 93
89(+)
88(-)
Inrush
R inr
M
U 96
V 97
W 98
P 14-50
130BD975.10
Illustration 2.13 Control Diagram for FC 360 30–75 kW
Product Overview
Design Guide
MG06B402
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