Brake Chopper - ABB ACS380 Firmware Manual

Machinery control program

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ACS380 FW.book Page 93 Friday, May 4, 2018 4:18 PM

Program features

Brake chopper

A brake chopper can be used to handle the energy generated by a decelerating

motor. When the DC voltage rises high enough, the chopper connects the DC circuit

to an external brake resistor. The chopper operation is based on hysteresis.

The internal brake choppers in the drive (in frames R0...R3) start conducting at

internal brake chopper start limit 780 V and stop conducting at internal brake chopper

stop limit 760 V (AC supply 380...480 V).

For information on external brake choppers, refer to the respective user manual.

Note: Overvoltage control needs to be disabled for the chopper to operate.

01.11 DC voltage

30.30 Overvoltage control

(page 221) and

parameter group

43 Brake chopper

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