28 Operation principle and hardware description
Overview circuit diagram of the drive
1 AC choke
2 Rectifier. Converts alternating current and voltage to direct current and voltage.
3 DC link. DC circuit between rectifier and inverter
4 Inverter. Converts direct current and voltage to alternating current and voltage.
5 Brake chopper (option +D150). Conducts the surplus energy from the intermediate circuit of the
drive to the brake resistor when necessary. The chopper operates when the DC link voltage
exceeds a certain maximum limit. The voltage rise is typically caused by deceleration (braking) of a
high inertia motor.
L1/U1
L2/V1
L3/W1
T1/U2
T2/V2
T3/W2
R-
R+
421
UDC-
UDC+
PE
5
ACS880-04 +P943
3
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