Brake Chopper - ABB ACS880 Firmware Manual
Primary control program
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Also See for ACS880:
- Firmware manual (764 pages) ,
- Manual (646 pages) ,
- Quick start up manual (146 pages)
Table of Contents
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60 Program features
Settings
Parameters
01.11 DC voltage
(page 91),
30.30 Overvoltage control
(page 195),
30.31
Undervoltage control
(page 195) and
95.01 Supply voltage
(page 292).
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 operates on the pulse width modulation
principle.
The internal brake choppers of ACS880 drives start conducting when the DC link
voltage reaches approximately 1.15 × U
. 100% pulse width is reached at
DCmax
approximately 1.2 × U
. (U
is the DC voltage corresponding to the
DCmax
DCmax
maximum of the AC supply voltage range.) For information on external brake
choppers, refer to their documentation.
Note: Overvoltage control needs to be disabled for the chopper to operate.
Settings
Parameter
01.11 DC voltage
(page 91); parameter group
43 Brake chopper
(page
239).
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