Dimensioning Of The Braking Unit And Its Corresponding Resistor - gefran BUy-1020 Manual De Instrucciones

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4. Dimensioning of the Braking Unit and its
Here following are some general information. Chapter 6 lists a series of normalized resistors
to be used with the BUy-... braking units in specifically assumed conditions.
Remember that:
P
[W]
PBR
P
[W]
NBR
E
[J]
BR
V
[V]
BR
I
[A]
PBR
I
[A]
AVBR
I
[A]
PBU
n
, n
[RPM]
1
2
t
, T [S]
BR
J
[Kg* m2]
TOT
Therefore:
Resistor ohmic value:
Resistor continuous rated power:
Corresponding Resistor
Power peak while braking
Resistor rated power
Braking energy
Braking voltage
Peak braking current
Average braking power
Braking unit peak current
Initial and final speed
Braking time and cycle time
Total moment of inertia (referred to the motor shaft)
P
= J
PBR
TOT
J
TOT
E =
2 *
BR
P
PBR
I
=
PBR
V
BR
P * t
PBR
BR
P
=
NBR
2T
—————— Braking Unit ——————
p
n -n
2
1
2
* n *
*
1
t
60
BR
p
2
2
(
)
2
2
(n -n )
*
1
2
60
V
£
BR
R =
BR
I
PBR
E
BR
=
T
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