Download - On Tap Ly Thuyet Mach 5384
-
8/22/2019 On Tap Ly Thuyet Mach 5384
1/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 1
KHI NIM C BN
I/ Ngun c lp:
1. Ngun p:P = U.I < 0L tng: Ri = 0Khng l tng:
Cng thc phn p:
2. Ngun dng:L tng: Khng l tng:
Cng thc phn dng:
II/ Ngun ph thuc:
1. Ngun p ph thuc vo p (AA)
= 2. Ngun p ph thuc vo dng (AD)
= 3. Ngun dng ph thuc vo p (DA)
= 4. Ngun dng ph thuc vo dng (DD)
=
III/ Cc thng s r, L, C, M1. in tr:
2. in cm:
3. in dung:
4. H cm: Du (+) khi 2 dng cng chy vo (hoc ra) u cntn (*). u cng tn th hin chiu qun dy.
A
B
-
8/22/2019 On Tap Ly Thuyet Mach 5384
2/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 2
IV. Cc thng s dng phc:Sut in ng
Nu tc ng l cos: Nu tc ng l sin:
nh lut Ohm
Trkhng
Dn np
in tr
in cm
in dung
H cm
-
8/22/2019 On Tap Ly Thuyet Mach 5384
3/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 3
CC PHNG PHP PHN TCH MCH INI/ nh lut Kirchoff I: Tng i s cc dng ti 1 nt bng 0.
- Ly du (+) khi dng chy ra khi nt- Ly du (-) khi dng chy vo nt
II/ inh lut Kirchoff II: Tng i s cc in p trn cc nhnh trong 1 vng kn bng 0.III/ Phng php in p nt:
- C s: nh lut Kirchoff I
- n strung gian: in p nt- n s cui cng: Dng in trn cc nhnh Dng cng thc bin i nt tnh dng in cc nhnh tin p cc nt.
Cch lm:- Chn nt gc bng 0V- Vit phng trnh cho cc nt, vi n sl in th cc nt:
V tri: Ly in p nt ang xt nhn vi tng dn np thuc nt , ri tri cc tch gia in nt ln cn vi dn np chung ca nt ln cn v nt ang xt.
V phi: Tng i s cc ngun dng c bin i t cc ngun p c ni vo nt ang xt.Du (+) khi chiu ca ngun dng chvo nt ang xt.Du (-) khi chiu ca ngun dng i ra khi nt ang xt.
- Gii hcc phng trnh va vit.- Dng cc cng thc bin i nt tm dng in trn cc nhnh.
V d:- Chn - Vit phng trnh cc nt:
Nt A: Nt B: . Nt C:
.
.
.
Nt D: . . Ta c hphng trnh:
( ) (
)
(
)
- Gii ra
- Cng thc bin i nt:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
4/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 4
IV/ Phng php dng in vng:- Cs: inh lut Kirchoff II- n s trung gian: - n s cui cng: Dng cng thc bin i vng tnh dng in cc nhnh tcc dng in vng
V d:
- Vit phng trnh cho cc vng:Vng 1: Vng 2: Vng 3: Ch ti du ca
- Gii ra - Dng cng thc bin i vng:
V/ Nguyn l xp chng:Mch in c cha nhiu ngun tc ng, c th coi do tng ngun tc ng (cc ngun khc ngn
mch), ri cng cc kt qu li.
-
8/22/2019 On Tap Ly Thuyet Mach 5384
5/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 5
VI/ nh l ngun tng ng:
Mch in c cha nhiu ngun tc ng c ni vi phn cn li ti cp im AB, c th thay th bngngun sut in ng bng .
- Ct nhnh c hi ra khi mch ti cp im AB- Tnh bng cc phng php hc- Tnh - Vs tng ng, lp nhnh b ct vo s v tnh I
* Ch : Cch tnh
c 2 nhnh song song:
Du (-) khi 2 dng cng chy vo (hoc ra) u cng tn
VII/ Bin i Laplace:
1. Bin i R, L, C trong min pin tr
u(t) = r.i(t) U(p) = r.I(p)in cm
in dung
-
8/22/2019 On Tap Ly Thuyet Mach 5384
6/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 6
2. Bin i Laplace ca mt s hm sc bn:Hm gc Hm nh Hm gc Hm nh
* 1
3. Bin i Laplace ngc - Heaviside: - Nghim ca l im 0 ca , c th nm bt c ch no trn mt phng phc.- Nghim ca l im cc ca , ch c th nm na mt phng tri v trn trc o.a) c nghim n
b) c nghim bi ( c) c cp nghim phc lin hip
-
8/22/2019 On Tap Ly Thuyet Mach 5384
7/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 7
MCH QU rC, rL, rLCNgun sut in ng bin thin theo thi gian, p ng ra ca mch bao gicng c dng: Trong :
l ch xc lp l chqu
l hng s thi gian
l in trtng ng ca ton mch (lc sau) nhn t c
im L (hoc C), vi iu kin ngn mch Eng, hmch Ing.Di tc ng 1 chiu, C coi nh hmch, L coi nh ngn mch.Cc bc gii:
kha Ktrng thi ban u, xc nh cc iu kin u ca bi ton: . V li m hnh trong min p. Chuyn K n v tr mi, vit phng trnh p ng ca mch trong min p. Gii phng trnh. Dng Heaviside chuyn F(p) f(t). Kim tra li bng cng thc trn.
V d 1: Cho mch in nh hnh v, lc u kha K m. . ng kha K, tm Khi K m, V li mch trong min p ng kha K, ta c phng trnh in p nt: *
*
Kim tra li:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
8/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 8
V d 2: Cho mch in nh hnh v, lc u kha K ng. . Mkha K, tm Khi K ng:
Khi K m: Theo nh lut Kirchoff II:
* Kim tra:
V d 3: Cho mch in nh hnh v. Tm i(t) = ?p dng nh lut Kirchoff II:
a/
-
8/22/2019 On Tap Ly Thuyet Mach 5384
9/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 9
b/ e (t) = 0
V d 4: Cho mch in nh hnh v. p dng nh lut Kirchoff II: a/
*
*
-
8/22/2019 On Tap Ly Thuyet Mach 5384
10/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 10
b/
-
8/22/2019 On Tap Ly Thuyet Mach 5384
11/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 11
MCH DAO NG NI. Mch dao ng n ni tip:
* *
a/ Dng in cng bc: b/ Dng in qu :
Lng suy gim loga tnhin ca dao ng tt dn:
.
Thi gian tt ca dng qu : in trti hn :
Khi
-
8/22/2019 On Tap Ly Thuyet Mach 5384
12/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 12
c/ Dng in tng hp:
Khi = 0 th
Di thng l di tn s m
-
8/22/2019 On Tap Ly Thuyet Mach 5384
13/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 13
II. Mch song songi ngu vi mch ni tip: Cc phn ti ngu:
Xy dng mch i ngu: Ly 1 im A trong mch v 1 im B ngoi
mch.
Ni AB, mi ln ni ct qua mt phn t (xemhnh minh ha)
ngha: Nu c 2 mch i ngu th tnh cht mch nyc thc suy ra mt cch i ngu t mch kia.
Ni tip Song song
1. Trkhng
1. Dn np
2. Dn np
| |
2. Trkhng
| |
3. Phm cht ti
3. Phm cht ti
4. Di thng 4. Di thng
5. lch tn s
5. lch tn s
-
8/22/2019 On Tap Ly Thuyet Mach 5384
14/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 14
6. Dng in
7. in p trn r
8. in p trn L
9. in p trn C
6. in p
7. Dng trn R
8. Dng trn C 9. Dng trn L
10. in p v dng in ti
}
10. in p v dng in ti
} in trtng ng ca mch dao ng n song song (thc t)
V d 1: Cho mch in nh hnh v. a/ Tnh b/ Cho Em = 20V, f = 400kHz. Tnh Um,
?
Gii: a/ Bin i mch nh hnh v trn
-
8/22/2019 On Tap Ly Thuyet Mach 5384
15/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 15
R= Ri // R = 5k R// b/ Vi Em = 20V
V d 2: Cho mch in nh hnh v.
a/ Cho Ingm = 5mA. Tnh R, C?b/ Cho Q = 10. Tnh c/ Tnh Um vi f = 200kHz.
Gii: a/ Ti f = 0 th b/
c/
-
8/22/2019 On Tap Ly Thuyet Mach 5384
16/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 16
TH BODENguyn tc chung ca th Bode l vp ng tn s ca mch (bin v pha) bng cch tng hp trctip cc c tuyn tn s thnh phn ng vi cc im 0 v im cc ca H(p).
c tuyn bin : c tuyn pha:
Cc c tuyn ny c thc hin trn thang t llogarithmic i vi , k hiu l trc [Decade]
nh v tr ca trn trc : a v dng n quyt nh Decade, nmg trong Decade (n; n+1) m quyt nh v tr ca trong Decade , m = 2 th nm ti 1/3 Decade, m = 5 th nm
ti 2/3 Decade
V d: nm trong Decade (3; 4) nm ti v tr 1/3 Decade
th Bode ca mt s hm s(xt im 0):1. 2.
Nu th ng cho 20dB/Dkhng i qua gc ta m i qua Nu th ng cho c dc 40dB/D v i qua 3.
||
[ ]
-
8/22/2019 On Tap Ly Thuyet Mach 5384
17/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 17
Nu th thbin khng thay inhng thpha i xng qua trc honhNu th dc ca thbin l 40dB/D.4. C cp nghim phc lin hip. Nu cp nghimphc ny nm na mt phng tri th:
*
Nu cp nghim phc nm na mtphng phi th thbin khng i,nhng th pha ly i xng qua trchonh.
-
8/22/2019 On Tap Ly Thuyet Mach 5384
18/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 18
5.
arg * Mt s ch :1. a thc bc nht:
*2. a thc bc hai: * * *
th Bode ca im cc (nghim mu s) i xng vi th ca im 0 qua trc honh.V d 1:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
19/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 19
V d 2:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
20/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 20
(1)
-
8/22/2019 On Tap Ly Thuyet Mach 5384
21/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 21
-
8/22/2019 On Tap Ly Thuyet Mach 5384
22/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 22
MNG BN CC
I/ Hphng trnh trkhng hmch:
i vi s hnh T:
II/ Hphng trnh dn np ngn mch:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
23/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 23
i vi s hnh :
Bn cc i xng: Khng phn bit c ca 1 v ca 2. Khi :
V d:Xt s tng ng hnh X c mng 4 cc i xng: | Theo Kirchoff II:
|
III/ Hphng trnh c tnh truyn t:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
24/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 24
a = detA = -1
i vi s hnh G:
* i vi s hnh G ngc:
IV/ Hphng trnh c tnh truyn t ngc:
b = det B = -1
V/ Hphng trnh c tnh hn hp:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
25/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 25
VI/ Hphng trnhc tnh hn hp ngc:
Lin h gia cc thng s ca mng 4 cc:
c im ca bng:+ Trong mt hnh ch nht bt k ca bng, tch cc thng s trn ng cho bng nhau.VD: -h21.z12 = h12.z21
-
8/22/2019 On Tap Ly Thuyet Mach 5384
26/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 26
VII/ nh l Batlet dng cho 4 cc i xng:Mi 4 cc i xng u c thc thay th bng s tng ng hnh X, vi cc phn t
c xc nh nh sau:+ Bi 4 cc i xng thnh 2 na bng nhau
+ - Dy dn thngb ct c ngn mch.- Dy dn cho b ct c hmch.
+ - Dy dn thngb ct c hmch.- Dy dn cho b ct c ngn mch.V d:
VIII/ K thut tnh ton - Chun ha gi tr:
S dng cho 4 i lng: R, L, C, + Chn 2 trong 4 i lng trn lm chun, ri tnh 2 i lng cn li theo 2 cng thc trn.+ Tnh ton cc gi trtng i, gii bi ton bng cc gi trtng i .+ i gi trtng i thnh gi tr tuyt i (nhn vi )V d:
Chn 2 gi tr chun: Tnh 2 gi tr cn li:
Xc nh cc gi trtng i:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
27/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 27
Tnh *
*
IX/ Ni ghp cc 4 cc:1. Ni tipNi tip:
2. Song songSong song:
3. Ni tipSong song:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
28/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 28
4. Song songNi tip:
5. Dy chuyn:
(1) (2)
(3)
(4)
(5)
ng dng: Bn cc phc tp c thc tch thnh cc bn cc n gin. Cc bn cc n ginny ni vi nhau theo cc cch trn.
Cc loi 4 cc n gin:Hnh T, hnh , hnh I, hnh G, hnh G ngc, hnh =, Transistor
-
8/22/2019 On Tap Ly Thuyet Mach 5384
29/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 29
V d: Cho mng 4 cc nh hnh v, xc nh cc thng s dn np ngn mch v thng s truyn t ca mng. Cho Gii:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
30/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 30
X/ Hm truyn t:
XI/ H s truyn t:
Vi 4 cc i xng:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
31/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 31
XII/ Cc thng s sng (Thm ch s 0 vo thng sthng):
-
8/22/2019 On Tap Ly Thuyet Mach 5384
32/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 32
Xc nh thng s sng:
Ch : Vi 4 cc i xng c phi hp trkhng 2 ca:Nu l 4 cc i xng vi s tng ng mch cu:
V d 1:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
33/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 33
V d 3:a.
-
8/22/2019 On Tap Ly Thuyet Mach 5384
34/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 34
XIII/ Bn cc tuyn tnh khng tng h:1. Hphng trnh trkhng hmch:
2. Hphng trnh dn np ngn mch:
3. Hphng trnh c tnh hn hp:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
35/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 35
4. V d v bn cc khng tng h:a. Girator:
K hiu ca Girator nh hnh v:Hphng trnh trkhng:
, + Cc thng smang ngc du vi iu kin tng h Girator l bn cc phn tng h. Cng sut tc thi p(t) = 0, Girator l phn tqun tnh, khng tng hnhng thng.Quan h gi trkhng vo ca ny vi trkhng ti ca kia:
nu r l s thc th 2 phn t trkhng i ngu.
b. Mch bin i trkhng m (NIC):
-
8/22/2019 On Tap Ly Thuyet Mach 5384
36/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 36
c. Transistor:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
37/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 37
d. Mch khuch i thut ton (Operational Amplifier)
Mch KTT l tng: Mch KTT khng l tng:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
38/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 38
V d 1: Xt mch khuch i thut ton nh hnh v:
V d 2: Mch cng v mch tr:
Mch cng:
Mch tr:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
39/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 39
V d 3: Xt mch khuch i thut ton:Xt nt 3: Xt nt 4: M T (2) (3)
a/ Mch lc thng thp
b/
Mch lc thng cao
c/ Mch lc thng di
Ba mch trn lKhu lc tch cc RC bc 2
-
8/22/2019 On Tap Ly Thuyet Mach 5384
40/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 40
MCH LC TN SB lc cho 1 hay nhiu di tn hiu i qua (di thng), chn cc di tn s cn li (di chn).Tn sgia di thng v di chn l tn s ct (cutfreq)
Mt b lc phc tp c th chia thnh cc b lc n gin (hnh T, hnh )
iu kin di thng:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
41/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 41
I/ Mch lc loi K:
1. Mch lc thng thp:
2. Mch lc thng cao:
3. Mch lc thng di:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
42/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 42
4. Mch lc chn di:
II/ Trkhng sng cc b lc loi k:1. Mch lc thng thp:a/ Hnh T:
Trong di chn: mang tnh in cm
Trong di thng: mang tnh in tr
b/ Hnh :
-
8/22/2019 On Tap Ly Thuyet Mach 5384
43/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 43
Trong di chn: mang tnh in dung Trong di thng: mang tnh in tr
2. Mch lc thng cao:a. Hnh T:
Trong di chn: mang tnh in dungTrong di thng: mang tnh in tr
b/ Hnh :
Trong di chn: mang tnh in cmTrong di thng: mang tnh in tr
3. Mch lc thng di:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
44/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 44
4. Mch lc chn di:
III/ Suy gim sng, dch pha sng ca cc b lc loi k: Trong di thng:
Trong di chn:
1. Mch lc thng thp: 3. Mch lc chn di:
2. Mch lc thng cao: 4. Mch lc chn di:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
45/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 45
IV/ Mch lc loi M:
1. Xy dng b lc loi m:a/ Chuyn ni tip tTk sang Tm:
+ Gi li 1 phn + Chuyn phn cn li mt cch ni tip xung nhnh song song to thnh
sao cho
b/ Chuyn song song tk sang m:+ Gi li 1 phn + Chuyn phn cn li mt cch song song ln nhnh ni tip to thnh sao cho
2. Cc loi b lc loi m:a/ Lc thng thp:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
46/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 46
b/ Lc thng cao:
{
c/ Lc thng di:
d/ Lc chn di:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
47/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 47
3. B phi hp trkhng:
Phi hp trkhng vi Ri = Rt = const
Tnh
:
ph thc vo m ( 0 < m < 1), vi m = 0,6 th trkhngsng bng phng trong sut di thng.
-
8/22/2019 On Tap Ly Thuyet Mach 5384
48/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 48
Tnh :
ph thc vo m ( 0 < m < 1), vi m = 0,6 th trkhng sngbng phng trong sut di thng.
4. Suy gim sng:
a/ Lc thng thp:
c/ Lc thng di:
*
b/ Lc thng cao:
d/ Lc ch n d i:
*
-
8/22/2019 On Tap Ly Thuyet Mach 5384
49/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 49
B lc loi K, cng i su vo di chn, . Tuy nhin chm. B lc loi M, cng i su vo di chn, cng gim. Tuy nhin nhanh ti .
V. Thit k b lc y :
-
8/22/2019 On Tap Ly Thuyet Mach 5384
50/52
L thuyt mch Daniel F.SHanoi University of Technology
Page 50
V d: Thit k lc thng thp y c Phi hp trkhng gia ngun v ti c v c suy gim sng cng i su vo di chn cng tin ti Gii:1. Lc K:
T (1) (2) suy ra: 2. Lc M:
-
8/22/2019 On Tap Ly Thuyet Mach 5384
51/52
L thuyt mch Daniel F.SHanoi University of Technolo
Page 51
3. Phi hp trkhng: (thay m = 0,6)
-
8/22/2019 On Tap Ly Thuyet Mach 5384
52/52
L thuyt mch Daniel F.SHanoi University of Technology
MC LCTrang
Khi nim c bn 1I. Ngun c lp 1II. Ngun ph thuc 1III. Cc thng s r, L, C, M 1
IV. Cc thng s dng phc 2
Cc phng php phn tch mch in 3I. nh lut Kirchoff I 3II. nh lut Kirchoff II 3III. Phng php in p nt 3IV. Phng php dng in vng 4V. Nguyn l xp chng 4VI. nh l ngu n tng ng 5VII. Bin i Laplace 5
Mch qu rC, rL, rLC 7Mch dao ng n 11
I. Mch dao ng n n i ti p 11II. Mch song songi ngu vi mch ni tip 13
th Bode 16
Mng bn cc 22I. Hphng trnh trkhng hmch 22II. Hphng trnh dn np ngn mch 22
III. Hphng trnh c tnh truyn t 23IV. Hphng trnh c tnh truyn t ngc 24V. Hphng trnh c tnh hn hp 24VI. Hphng trnh c tnh hn hp ngc 25VII. nh l Batlet dng cho 4 cc i xng 26VIII. K thut tnh tonChun ha gi tr 26IX. Ni ghp cc bn cc 27X. Hm truyn t 30XI. H s truyn t 30XII. Cc thng s sng 31XIII. Bn cc tuyn tnh khng tng h 34
Mch lc tn s 40I. Mch lc loi K 41II. Trkhng sng ca cc b lc loai K 42III. Suy gim sng, dch pha sng ca cc b lc loi K 44