Page 163 - Electrician -1st Year - TT

TYo (Power) T«t£ 1.5.46 dLô] ùRôPo× LÚj§Vp
GXdh¬μVu (Electrician) þ AC ªuÑtßdLs (AC Circuits)

ùRôPo CûQl× ùWùNô]v ªuÑtß (Series resonance circuit)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• ùRôPo CûQl× ùWùNô]v ªuÑt±u Cm©PuvûV ®[dÏRp
• ùRôPo CûQl× ùWùNô]v EiPôYRtLô] ¨TkRû]Ls Utßm ARu ϱlûT
áßRp
• ùWùNô]v @lÃdÏYu£ Utßm ARu ãj§WjûR áßRp.

ùRôPo CûQl× ùWùNô]v ªuÑtß RÜPàm X B]Õ þ90 AÜh Bl úTv
C
(Series resonance circuit) RÜPàm CÚdÏm. G]úY ªuÑt±u
ùRôPo CûQl× ùWùNô]v ªuÑt±p Cm©Puv 'Z' B]Õ ùW£vPuv Utßm
Cm©Puv (Impedance of series resonance ¬VôdPuv B¡VYt±u úT^ôo (phasor)
circuit) : JÚ ÑXTUô] ùRôPo CûQl× LC áhÓjùRôûLVôÏm. CÕ Fig þ 1C «p dotted
ªuÑtß Figþ1p Lôi©dLlThÓs[Õ. CkR úLôÓ êXm Lôi©dLlThÓs[Õ.
ùRôPo CûQl× LC ªuÑt±p ªuÑt±u Cm©Puv 'Z' ¸úZ RWlThÓs[Õ.
Z = R + (X − X L ) 2
2
C
X ûV ®P X A§LUôL CÚkRôp Cm©Puv
C L
'Z' B]Õ
Z = R + (X − X C ) 2
2
L
Fig 2(a)«p Lôi©dLlThÓs[ ªuÑt±u
ùUôjR Cm©Puv Z
2 2
Z = R + (X − X L )
C
2
Z = 40 + 30 2
– ùRôPo CûQl× ªuÑt±p ùUôjR Z = 50 ùLlTô£h¥q (X >X )
C
L
ªuRûP 'R' Kmv³p ªuÑt±u Y¯VôL ùNpÛm
–X CuPd¥q ¬VôdPuv Kmv³p ªuú]ôhPm I
L
–X ùLlTô£h¥q ¬VôdPuv Kmv³p V 100
C I = = = 2 Amps.
Fig 1aþ«p ùLlTô£h¥q ¬VôdPuv 90 Z 50
Utßm CuPd¥q ¬VôdPuv 60 BûLVôp LômùTô]hLÞdÏ CûPúV
Lôi©dLlThÓs[Õ. ùLlTô£h¥q EiPôÏm ªu]ÝjR Årf£ B]Õ
¬VôdPuv A§LUôL CÚlTRôp ¨LW YÚUôß
¬VôdPuv ùLlTô£h¥qYôL CÚdÏm CÕ V = 'R'þdÏ CûPúV EiPôÏm ªu]ÝjR
R
Fig 1bþp Lôi©dLlThÓs[Õ. Årf£
ϱl×: CuPd¥q ¬úVdPuû^ I.R = 2 x 40 = 80 volts.
®P ùLlTô£h¥q ¬VôdPuv V = 'L'þdÏ CûPúV EiPôÏm ªu]ÝjR
L
Ïû\YôL CÚkRôp ¨LW ¬VôdPuv Årf£
CuPd¥qYôL CÚdÏm. I X = 2 x 60 = 120 volts.
.
L
¬VôdPuv Utßm ùW£vPuv B¡V V = 'C'þdÏ CûPúV EiPôÏm ªu]ÝjR
C
CWi¥u A[dÏm AXÏLÞm (unit) Ju\ôL Årf£
CÚkRôÛm (Kmv) AkR ªuÑt±u I X = 2 x 90 = 180 volts.
.
C
Cm©PuvûV R, X Utßm X þ«u V Utßm V G§o ùTôXô¬¥«p Es[Rôp
L C L C
áhÓjùRôûL êXm LiP±V Ø¥VôÕ. ¨LW ¬Vôd¥q ªu]ÝjRm
Hù]²p X B]Õ +90 AÜh Bl úTv
L
143