Operation principle and hardware description 27
3
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 ACS355 is a wall or cabinet mountable drive for controlling asynchronous AC
induction motors and permanent magnet synchronous 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.
Capacitor
bank
U2
V2
W2
AC motor
M
3~
Rectifier
Inverter
Brake chopper
U1
V1
W1
BRK-
BRK+
AC supply
/ Common DC terminals
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...