Operation Principle And Hardware Description; What This Chapter Contains; Operation Principle - ABB ACS150 series User Manual

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
U1
V1
AC supply
W1
Brake chopper
Capacitor
Inverter
bank
BRK- BRK+
Operation principle and hardware description
U2
V2
M
AC motor
3~
W2
19