ABB MicroFlex e150 User Manual

22 Hardware description
 Operating principle
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.
R1 R2
U
V
W
L1
L2
L3
Rectifier Capacitor
bank
Inverter
Brake chopper
AC supply
AC motor

ABB MicroFlex e150 Specifications

General

Brand	ABB
Model	MicroFlex e150
Category	Control Unit
Language	English