7/24/2019 MIT OpenCourseWare Ch02

1/4

MIT OpenCourseWarehttp://ocw.mit.edu

6.334 Power Electronicsprin! "##$

%or in&ormation a'out citin! these materials or our Terms o& (se) *isit: http://ocw.mit.edu/terms .

7/24/2019 MIT OpenCourseWare Ch02

2/4

Chapter 2

Introduction to Rectifers

Read Chapter 3 o Principles o Power Electronics (KSV !" #$ %$ Kassa&ian'

$

)$ Schlecht' and %$ C$ Ver*hese' +ddison,-esle"' .//.$ Start with si0ple hal,

wa1e rectifer (ull,!rid*e rectifer directl" ollows$

Ld +

Id

Vx D1 id +

+ t Vo VsSin(t) D2

Vx

2

VsSin(t)

D1 ON D2 ON

)i*ure 2$. Si0ple al,wa1e Rectifer

In P$S$S$

4 1o 5 6 417 5 1s

6 (2$.

8.9

7/24/2019 MIT OpenCourseWare Ch02

3/4

2$.$ :;+< RE%=:+>I;? ..

1s

I :d @i*A

id B Id 68R

(2$2 I:

Rd 2

D

8 we can appro7i0ate

load as a constant current$

2$. :oad Re*ulation $?ow consider addin* so0e ac,side inductance :c (reactance Fc 6 D:c$

G Co00on situation >ransor0er lea&a*e or line inductance' 0achinewindin* inductance' etc$

G :c is t"picall"H

:d (flter inductance as it is a parasitic ele0ent$

Lc Ld

D1

+ RVsSin(t) D2Vx

)i*ure 2$2 +ddin* So0e +C,Side Inductance

+ssu0e :d + (so ripple current is s0all$ >hereore' we can appro7i0ate load as a special current

source$

17

Special since 41: 56 9 in P$S$S$ Id 645 (2$3

R

+ssu0e we start with

7/24/2019 MIT OpenCourseWare Ch02

4/4

C+P>ER 2$ I?>R;I;? >; REC>I)IERS

i1

Lc

D1

VsSin(t)

D2i2

Id

)i*ure 2$3 Special Current

Ghereore'