O A N G V A N OAO. LE V A N DOANH

KY THUAT DIEN LY THUYET, BAI TAP GIAI SAN

BAI TAP CHO DAP SO m

VA BAI TAP TRAC NGHIEM

In Idn thii 12, c6 chinh sita va bo sung

OAi HOC QUOC GIA HA NQI TRUNG TAM THONG TIN THLf VI$N

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N H A X U A T BAN KHOA HOC VA KY THUAT HA NOI - 2007

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MUC LUC

Ldi noi dau PHAN I. MACH D I £ N

Bai tap trac nghidm chuang 1 Chuang 2. Dong di6n sin

Bang torn idt chuang 2 Cau hoi 6n tap chuang 2

Bang t6m i t chuong 3 Cauhdi 6n tap chuang 3

Bai tap chuang 3 B&i tap i rk nghiCm chuang 3

3

9 10 11 15 16 18 18

Chuang J. Nhffng khai niem ca ban v^ mach di^n 1.1. Mach dien, k^ cafu hinh hoc ciia mach difin ^ 1.2. Cac dai luang d^c trung cho qua trinh nang lugng trong mach dien 1.3. Mo hinh mach dien, cac th6ng sd' 1.4. Phan loai va cdc ch^ d6 lam vide cua mach difin 1.5. Hai djnh luat Ki^chtfp Bang tom tat chuong 1 Cau hoi on tap chuong 1 Bai tap chuang 1

24 26

2.1. Cac dai luang dac trung cho dong difin sin 26 2.2. Trj s6' hiftu dung cCia dong diSn sin 27 2.3. Bieu di6n d6ng difin sin bang vecta 28 2.4. D6ng dien sin trong nhanh thu^n diCn tra 29 2.5. D6ng di^n sin trong nh^nh thuan didn cam 30 2.6. Dong dien sin trong nhanh thu^n difin dung 31 2.7. Dong dien sin trong nhdnh R-L-C n6i ticp 33 2.8. C6ng suaft cua d5ng difin sin 34 2.9. Nang cao hft s6 c6ng suaft cos^ 2.10. Bie'u di^n dong dien sin bang s<5phiic 37

40 41 41 50 52 52

36

bai tap chuang 2 Bai tap trac nghifim chuang 2

Chuang 3. C6c phircfng phap ph^n tfch mach dl6n 3.1. Ohg dung bi6u diSn vecia giai mach diCn ' 3.2. Uhg dung bi^u diSn s6 phiic giai mach dien ^ 3.3. Phuong phap bi^n d6i tuang duang ^g 3.4. Phirang phap dong dien nhanh 3.5. Phuang phap d6ng dien v6ng 36 . Phuang phdp dien ap hai nut

59 61 62 04

66 66 79

5

Bai tap chuong 5 Bai tap trac nghiem chuang 5

Chuong 6. Mach dien phi tuyen 6.1. Nhung khai niem chung vi mach dien phi tuyen 6.2. cac phuang phap ti'nh mach phi tuyen

81 81 83

Chuang 4. Mach ba pha 4.1. Khai niem Chung 4.2. Cach n6\ hinh sac »'* 4.3. Cach n6i hinh tarn giac 85 4 4. C6ng suat mach dien ba pha 86 4 *i Do cong suat mach ba pha gg 4 6 each giai mach dien ba pha doi xung ^ 4 7. each giai mach ba pha khong d6'i xiJng ^^ 4.8. Cach noi nguOn va tai trong mach ba pha

97 110 111

Bang torn tat chuang 4 ^^ Cau hoi on tap chuang 4 Bai tap chuong 4 Bai tap trk nghiem chuang 4

Chuang 5: Qua trinh qua do trong mach dien 5.1. Khai niem chung ve qua trinh qua dp 111 5.2. Phuang trinh vi phan cua qua trinh qua do 111 5.3. Qua trinh qua dp trong mach R-C 113 5.4. Qua trinh qua do trong mach R-L 115 5.5. Ti'nh toan qua trinh qua dp bang phuang phap toan tir 116 Bang torn tat chuang 5 119 Cau hoi on tap chuang 5 120 Bai tap chuong 5 , ^Q

128 130 130

--- r 6 t-..«y iinh mach phi tuyen , 09 Cau hoi on tap chuang 6 Bai tap chuang 6 ^ ^^

135 PHANU.Uk^mtN

Hur..^ 7 Khai niem Chung v^ may dien /•J.Dinhnghlaviphanloai

cua may d . r ' ' ' " ' ^ ' " '' ''^' ^ ^ - - ^ 'nh thuan nghich

' t Sell:; "'?-''• '"' -"--htu ''' 7'6Phat!^ ^'^''^^^'^^yd^en ' ^43 / | Phat nong va lam mat may dien ^^^ ^ ^ y h u a n g p h a p n g h i e n c t r u L y l n ' ^^ Bang tom tat chuang 7 '"^y ^len ^^^ cau hoi on tap chuong 7 148 Bai tap chuang 7 I4g Baitap trac nghiem Chuang 7 148

139 139 141

8.1. Khdi niCm chung 8.2. Oil lao cua m4y bi^n ^p

Bang i6m tai chuang 8 Cau hoi 6n tap chuang 8 Bai tap chuang 8 B i tap trac nghiem chuang 8

Chifcmg 9. M6y dien khong d6ng b6 9.1. Khai ni6nn chung

1 • Bang t6m tat chuang 9 cau hoi ftn tap chuang 9 * ' Bki tap chuong 9 ^ ; Bai tap trac nghi6m chuong 9

Chuang 10. May die*n dong b6 10.1. Dinh nghTa va c6ng dung

154 154 155 157

8.3. Nguyen ly lam vi^c ciia may bi<fn <1p 8.4. Mft hinh todn cua m.ly bitfn ap 8.5. So d6 thay the' may bie'n ap 8.6. Che do kh6ng tai cua miy bien Ap 8.7. Che do ngan mach cua may bifn ap 8.8. Che do c6 tai ciia may bien ap 8.9. May bie'n ap ba pha ..,-8.10. Su lam viec song song ciia cac mdy bidn ap 174 8.11. cac may bien ap dac biei j ^ ,

178 179 179

1.58 161

166 168

193 195 195

9.2. Cafu tao ciia may dien kh6ng d6ng b6 ba pha 196 9.3. Tir truong ctJa may dien kh6ng d6ng b6 I'jn 9.4. Nguyen ly lam viec cua may dien kh6ng d6ng b6 203 9.5. Mo hinh loan ciia d6ng ca di6n kh6ng d6ng b6 204 9.6. So do thay th5 dftng ca khftng d6ng b6 207 9.7. Bieu d6 nang lugng va hieu suSfl ciia dong ca kh6ng d6ng b6 209 9.8. Mo men quay ciia ddng co khdng d6ng bd ba pha 210 9.9. Mo may d6ng co kh6ng d6ng b6 ba pha 212 9.10. Didu chinh t6c d6 dOng ca dien khdng d6ng bd 216 9.11. cac dac tfnh lam viec ciia d6ng co dien khOng diSng b6 218 9.12. D6ng CO khong d6ng b6 hai pha' 219 9.13. D6ng CO kh6ng d6ng bO m6t pha*- 220

• 223 224 225 236 238 238 238 240 10.2. CJfu tao may dien d6ng b6 ^ ^

10.3. Nguyen 1 lam viec ciia may phat dien d6ng bO ^40 10 4 Phan Lfng ph3n tJng cua may phai di6n d6ng b6 ^^^ 10.5. M6 hinh toan cua may phat dien d6ngb6 242

10 6 C6ng su^t dien ttr cua m5y phat dien dung b6 cue 16. ^45 10.7. Dac tfnh ngoai vh dac ti'nh di^u chinh 246 ,0.8. Su lam viec song song cua cac may ph^t d.en d6ng b5

7 .

265 269 274

Trang ^ A /L

10.9. D6ng ca dien d<5ng bo 10.10. Cac may dien ddng b6 co ca'u tao dac biet 248 Bang torn tat chuang 10 249 cau hoi dn tap chuang \0 249 Bai tap chuang 10 250 Bai tap trac nghiem chuang 10 256

Chuang 11. May dien mot chieu 258 I I I . Cau tao may phat hien mot chieu 258 11.2. Nguyen ly lam viec ciia may phat va ddng ca dien mot chieu 260 11.3. Tir trudng va sire dien dong ciia may dien mot chieu 262 11.4. Cong suat dien tir m6 men dien tir cua may dien mot chieu 264 11.5. Tia lira tren vanh gop va bien phap khac phuc 2^5 11.6. May phat dien mot chieu 11.7. Dong ca dien mot chieu Bang tom tat chuang 11 Cau hoi on tap chuang 11 Bai tap chuang II 274

Bang tom tat so sanh cac loai dong ca dien thong dung H^ Bai tap trac nghiem chuang 11 ^^^

285

PHAN III. mtN TiJ CONG SUAT VA DifiU KHI^N MAY D I £ N Chuang 12. Dien tir cong suat • ^

12.1. Nhirng khai niem chung v^ dien tu cong suat HI 12.2. Cac l.nh kien ban din cong suat ^87 12.3. cac so d6 chinh luu 288 12.4. Bie'n d6i dien apxoaychi^u 292 ^ • 5 . Bp bam dien ap mot chi6u 297 1 .6. Bp nghich luu 298 12.7. Bp bien tan 300

Bang torn tat chuang 12 301 *-au hoi on tap

Bai tap chuong 12

I f 3. M6men t r d r | t : : n t ' ' " ' ^° ^"^ ^^"^ - ^ - n \\l ^^•4- f ieu khien d6np J' ' ' " ^ ' " ^^"^ ^len ^^^ ^^•5«) ieukhie 'ndr^ ' ' ' ' ^ ' - " '^^ '^h .^" ' ^^^ '^•6- D.eu khie'n T^ ""' ' ' • " ^^^"^ ^^"g b6 ^^6 '^•7-Di^u khien d " ^ ' ^ " ^ ^ ^ '"" C^u ho. 6n tip c h u a n V i T ' " ' ' ' ' '^^" ^°"g bo ^22 Bai tap chuang 13 ^23

324

302 304 304

324