Technosoft IDM240-5EI Technical Reference page 43

where C = C + C
EXT DRIVE
3. to limit the average current below the drive nominal current I
where t is the time interval between 2 brakes in case of repetitive moves.
CYCLE
4. to be rated for an average power
Remarks:
U
U
MAX BRAKE
>
1. If
I
2
PEAK
time to decelerate or C
×
P t
BR d
2. If
2
×
t I
CYCLE
NOM
or t – the time interval between braking cycles must be increased
CYCLE
WARNING!
© Technosoft 2011
−
E
M
=
P
BR
is the overall capacitance on the motor supply (external + drive), i.e:
R
BR
>
R
BR
=
P
AV
2
the braking power P
×
P
BR
– the external capacitance on the motor supply
EXT
2
U
BRAKE
>
either the braking power must be reduced (see Remark 1)
×
P
2
BR
THE BRAKE RESISTOR MAY HAVE HOT SURFACES
DURING OPERATION.
1
2 2
−
C ( U U
MAX brake
2
t
d
2
U
BRAKE
<
×
P
2
BR
NOM
×
P t
BR d
2
×
t I
CYCLE
NOM
×
P t
BR d
and a peak power
t
CYCLE
must be reduced by increasing either t
BR
32
)
= 5A (IDM240) / 8A (IDM640)
2
U
MAX
=
P
PEAK
R
BR
IDMx40 Technical Reference
– the
d