Festo SEC-AC-305, Fitting And Installation Instructions

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1 . Summ a ry o f co mp o n e nt s
1 − 8
F es t o P.BE−SE C − AC −HW−EN e n 0511c
1 .4. 3 F ee d i n g b ac k th e br a k i n g e n e r g y
SE C − AC − 305 a nd SE C − AC − 508
Th e br a k i n g e n e r g y is f e d b ac k i nt o th e i nt e rm e d ia t e ci r c u i t
wh e r e i t c r ea t es a v ol t age i n c r ease .
Br a k i n g c h o pp e r w i th
br a k i n g r esis t o r
A br a k i n g c h o pp e r w i th br a k i n g r esis t o r is i nt eg r a t e d i n th e
f i n al o utput s t age . If a ce rt ai n li m i t v al u e o f th e i nt e rm e d ia t e
ci r c u i t v ol t age is e x cee d e d dur i n g th e f ee db ac k, th e br a k i n g
e n e r g y w ill b e co nv e rt e d t o h ea t by th e i nt e rn al br a k i n g r e
sis t o r s . Co ntr ol o f th e br a k i n g c h o pp e r is ca rr ie d o ut by so ft
w a r e i n th e SE C − AC . Th e i nt e rn al br a k i n g r esis t o r s a r e pr o
t ec t e d agai n s t o v e r loa d.
If, i n a p a rt ic u la r a pp lica t io n, th e o utput o f th e i nt e rn al r esi
s t o r s is n o t s uff icie nt, a n e xt e rn al r esis t o r ca n b e co nn ec t e d
as d esc r i b e d i n c h a pt e r 3 . 3 . 2 .
S i mu l t a n eo u s o p e r a t io n o f th e i nt e rn al a nd e xt e rn al br a k i n g
r esis t o r s is n o t p ossi b le . Th e e xt e rn al r esis t o r s a r e n o t pr o t ec
t e d agai n s t o v e r loa d a ut o m a t icall y by th e SE C − AC .