SINUS PENTA
REGENERATIVE
APPLICATION
65/
140
0
1
2
3
4
2.8.
Additional Components for the Braking Unit
Application
2.8.1.
I
SOLATION
T
RANSFORMER
Use an isolation transformer with unitary transformation ratio and apparent power equal to the RGN drive
power when used at the mains voltage. The filter inductance can be incorporated into the transformer.
2.8.2.
DC-B
US
D
IODE
Diode specifications are the following:
Inverse Voltage (V)
Type
Recovery time
(
3
s)
Rated Current
2T Class
4T Class
5T & 6T
Classes
Loss (W)
Fast or
ultrafast
<1
3*rated current
of the
regenerative
drive
>600V >1200V
>1700V
2*rated
current of
the
regenerative
drive
Provide proper diode dissipation so that the temperature of its frame does not exceed 80 °C.
2.8.3.
E
XAMPLE
:
D
IMENSIONING THE
R
EGENERATIVE
D
RIVE AS A
B
RAKING
U
NIT
Application: bridge crane
Weight to lift: 10,000 kg
Reducer performance: 0.8
Lifting rate: 1m/s
Acceleration required: 1m/s
²
Mechanical power while lifting: 98.1kW
Overload required while lifting: 10kW
Mechanical power while lowering: 78.48kW
Overload required while lowering: 8kW
Motor performance: 0.92
Regenerative drive power: 57.7kW
Overload: 7.36kW
Mains voltage: 400VAC
Regenerative drive used: SINUS PENTA 067 4T; rated power: 63.2kW at 400VAC; peak power: 72.5kW.
Option components required:
Interface panel 4T060-67
Regenerative inductance: 0.7mH/103A
Three-phase transformer: 400/400, 60kVA with built-in 0.35mH resistor
Uncoupling diode: 300A/1200V (e.g. SKKE301F with IFav=220A, Vrrm=1200V, trr=690ns)
Heatsink: 0.2 °C/W