Lenze E82xVxxxKxxxxx - Manual (Page 295)

Function library
Acceleration, deceleration, braking, stopping
AC motor braking
10
l
295 EDS82EV903 EN 3.0
Adjustment
Parameter Code Setting parameter set 1
(active during normal operation) Setting parameter set 2
(active during braking operation)
Switching threshold C0988 Set C0988 depending on the mains voltage:
AC 230 V ð C0988 = 112 %
AC 400 V ð C0988 = 112 %
AC 440 V ð C0988 = 123 %
AC 460 V ð C0988 = 129 %
AC 480 V ð C0988 = 134 %
AC 500 V ð C0988 = 140 %
V/f rated frequency C0015 Value adapted to the drive, e.g. 50 Hz Depending on the drive power, up to a
minimum of 25 % of the value of C0015
in parameter set 1:
l General rule: 2.2 kW ð 50 %
l Reduce value in case of smaller drive
powers. Increase value in case of
higher drive powers.
That way, the energy in the motor is
reduced due to overexcitation during
operation with parameter set 2.
V
min
boost C0016 Value adapted to the drive, e.g. 5 % Depending on the drive power, up to
five times the value of C0016 in
parameter set 1:
l General rule: 2.2 kW ð factor 3
l Reduce factor in case of smaller drive
powers. Increase factor in case of
higher drive powers.
That way, the energy in the motor is
also reduced in the lower speed range
due to overexcitation during operation
with parameter set 2.
Deceleration time for quick stop
during braking along the quick stop
ramp: C0105 Required braking time for AC braking Deceleration time of the drive with
max. centrifugal load.
The OU message (overvoltage) must not
be provided during the deceleration.
Deceleration time during the
braking process at the main setpoint
ramp: C0013
Setting tips
The higher the mains voltage the longer the deceleration time must be set in parameter
set 1 in order to be able to carry out AC motor braking. Hence, braking times with DC
injection brakes are shorter at mains voltages > 400 V.
)
Note!
ƒ Changeover of the parameter set via terminal, bus or PC is not possible if
C0988 > 0!
ƒ C0988 is always the same for all parameter sets.