Operation principle and hardware description
What this chapter contains
The chapter briefly describes the operation principle, layout, type designation label
and type designation information. It also shows a general diagram of power
connections and control interfaces.
Operation principle
The ACS150 is a wall or cabinet mountable drive for controlling AC induction motors.
The figure below shows the simplified main circuit diagram of the drive. The rectifier
converts three-phase AC voltage to DC voltage. The capacitor bank of the
intermediate circuit stabilizes the DC voltage. The inverter converts the DC voltage
back to AC voltage for the AC motor. The brake chopper connects the external brake
resistor to the intermediate DC circuit when the voltage in the circuit exceeds its
maximum limit.
Rectifier
Capacitor
Inverter
AC supply
U1
V1
W1
bank
U2
V2
W2
M
AC motor
3~
Brake chopper
BRK- BRK+
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