Download e-book for iPad: AC Power Conditioners. Design and Application by James Clark
By James Clark
AC energy Conditioners: layout and functions presents a few perception into some of the different types of strength line disturbances, difficulties that take place day-by-day, and their corresponding strategies. This ebook is geared up into 4 elements encompassing 14 chapters; every one half offers with a unique kind of energy protection.
Part I introduces some of the varieties of power-line difficulties encountered that may be destructive to digital apparatus or the knowledge it includes. elements II and III are dedicated to noise and surge aid, in addition to energy line rules. those elements describe using thyristor regulator, constant-voltage transformer, and linear and switching power-line regulators. half IV makes a speciality of blackout safety, with specific emphasis at the use of switching converter, thermal administration, filters, and inverter keep watch over circuitry.
This booklet is meant essentially to scholars and researchers.
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Extra info for AC Power Conditioners. Design and Application
Inductors L y and L 2 will facilitate r e d u c t i o n o f t h e r a t e o f r i s e o f t h e s u r g e c u r r e n t s o t h a t V ^ c a n d o its j o b . A R f u r t h e r b e n e f i t o f t h i s t y p e o f c i r c u i t is t h e p r e s e n c e o f t h e c a p a c i t o r s inductors, which in addition to helping reduce surges, will also and provide c o m m o n - a n d differential-mode n o i s e suppression as described earlier in this section. CHAPTER 4 Line Isolation P o w e r t r a n s f o r m e r s , as f o u n d at t h e s e r v i c e e n t r a n c e t o a b u i l d i n g , a r e de s i g n e d to o p e r a t e f r o m n e a r l y z e r o s o u r c e i m p e d a n c e , at o n l y t h e p o w e r - l i n e f r e q u e n c y t o w h i c h it is a t t a c h e d , f o r t h e s o l e p u r p o s e o f t r a n s f e r r i n g power f r o m t h e utility.
T h e m a x i m u m steady-stat e v o l t a g e r a t i n g o ft h e e q u i p m e n t t o b e p r o t e c t e d m u s t t h e n b e d e t e r m i n e d . T h i s is o f t e n k n o w n a s t h e standoff v o l t a g e . T h e r e p e t i t i o n r a t e o f t h e t r a n s i e n t a n d m a x i m u m p o w e r dissipatio n th e devic e m u s t h a n d l e ar e critica l i n selectin g the suppressor . Finall y th e clampin g voltage , o r th e voltag e appearin g acros s the suppresso r du e t o pea k curren t an d temperature , mus t b e determined .
0 — ■■>! ^peak M K(l) ^peak S. i Equation t ► 'peak 'peak : i FIGURE 3-4 Transient waveform applied to MOV. 3. S u r g e R e d u c t i o n 31 S i n c e t h e c l a m p i n g a b i l i t y o f t h e M O V is o f i n t e r e s t h e r e , o n l y t h e v o l t a g e s or transients that m a y occur over a n d above the rated p e a k line voltage are to b e c o n s i d e r e d . T h e w o r s t - c a s e ratio o f p e a k s u p p r e s s e d v o l t a g e at a g i v e n cur r e n t t o t h e m a x i m u m r a t e d s t e a d y - s t a t e p e a k c i r c u i t v o l t a g e is t h e e f f e c t i v e c l a m p i n g r a t i o .
AC Power Conditioners. Design and Application by James Clark