Unitec DS-205.4, Руководство пользователя

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28
Electrical Installation
Regenerative circuit
The energy generated during braking is refed to the
DC-BUS. The Elkos DC-Buses are able to store only
a small amount of energy. The excess energy has to
be converted into heat in the regenerative resistor.
The internal resistor is designed for drives without
flyweights.
Always use external regenerative resistors for
flyweights or design uncertainties.
F2- protection from earth fault.
Electronic limit from overload and regenerative
discharge short circuit.
R
e
g
e
n
ci
rc
u
it
External regen resistor
Dimensionierung
Maximum breaking power calculation
Jg x
D
n x n
P
max
[W] = -----------------------------
91 x t
B
Jg = Total inetia at motor [kgm
2
]
n = maximum speed [min
-1
]
n = difference in speed [min
-1
]
t
B
= braking time [ s ]
Power regen resistor
Pmax
P regen resistor [W] = -------------------
K1 x K2
Type DS
205 403
Internal regen resistor Ohm
51 80
Continius power W
50
50
Pulse power 1s kW
6
6
External resistor min. Ohm
51 80
Fuse F2 AF
10 10