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Program features 93
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.
Settings
Parameters
01.11
DC voltage
(page
116
),
30.30
Overvoltage control
(page
221
) and
parameter group
43 Brake chopper
(page
276
).
ACS380 FW.book Page 93 Friday, May 4, 2018 4:18 PM
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