Rezonans w obwodach elektrycznych v7, POLITECHNIKA

POLITECHNIKA LUBELSKA	*LABORATORIUM PODSTAW ELEKTROTECHNIKI*
w LUBLINIE	WICZENIE NR: 14
Buczek Remigiusz Wdowczyk Pawe Domaski Piotr		SEMESTR: 2	GRUPA: EDi 2.1	Rok akademicki: 1997/98
REZONANS W OBWODACH ELEKTYRYCZNYCH			DATA WYKONANIA 1998.05. 22	OCENA:

Cel wiczenia:

Celem wiczenia jest zapoznanie si ze zjawiskiem rezonansu w obwodach R,L,C.

Wyznaczenie charakterystyk czstotliwociowych w obwodzie szeregowym i r�wnolegym,

oraz zbadanie zachowa poszczeg�lnych element�w podczas rezonansu.

Schemat pomiarowy:

Ukad szeregowy:

Ukad r�wnolegy:

Spis przyrzd�w:

1 Power generator type PO-27 nr 2301,

2 Digital multimeter type V 543 nr 112/78,

3 Autotransformator 220/250 V,

4 Miernik uniwersalny LAWO 1 kl. 0.5,

5 Rezystor R=160 /0.63A,

6 Kondensatory C1=10 F , C2=18 F /380V,

7 Cewka L=0.87 H, Xl=87 , z=3000 zw,

Przebieg wiczenia:

wiczenie polegao na pomiarach napicia na elementach obwodu R,L,C przy staej wartoci napicia

zasilajcego obw�d ok. 6V,za przy czstotliwoci zmieniajcej si w granicach od 20 Hz do 200Hz .

Pomiar�w dokonywalimy przy r�nych wartociach rezystancji R i pojemnoci C. Obliczylimy

wartoci Xl , Xc , oraz Z.

Tabele pomiarowe:

Tabela 1.1

*C=10* *F L=0.87 H*
LP	Uz	f	I	*Url*	Uc	Z	Xc	Xl	R
	V	Hz	mA	V	V
1		20	*7,5*	1	*6,8*	26	*796*	*109*
2		30	*13,5*	*2,4*	8	19	*530*	*163*
3		40	23	*5,2*	*10,2*	13	*398*	*218*
4		50	40	*13,4*	*16,8*	*6,7*	*318*	*273*
5		55	58	*18,6*	*19,1*	*3,3*	*289*	*300*
6		60	58	*19,8*	*17,4*	*7,8*	*265*	*327*
7		65	45	*17,2*	*12,7*	*10,5*	*244*	*355*	*R=0*
8	6V	70	38	*15,2*	10	*12,4*	*227*	*382*
9		80	25	*10,9*	*5,5*	*15,4*	*199*	*437*
10		90	*19,2*	*9,5*	*3,7*	*17,7*	*176*	*492*
11		*100*	16	*8,6*	*2,7*	*19,6*	*159*	*546*
12		*120*	12	*7,7*	*1,6*	*22,8*	*132*	*655*
13		*140*	*9,2*	*7,2*	*1,1*	*25,5*	*113*	*762*
14		*160*	*7,8*	*6,9*	*0,8*	*27,8*	99	*874*
15		*200*	*5,6*	*6,6*	*0,4*	*31,8*	79	*1092*
1		20	7	*1,9*	*6,3*	*186*	*796*	*109*
2		30	*11,5*	*3,4*	*6,8*	*179*	*530*	*163*
3		40	*16,2*	*5,3*	*7,1*	*173*	*398*	*218*
4		50	*19,7*	*7,3*	*6,8*	*166,7*	*318*	*273*
5		55	*20,2*	*7,9*	*6,4*	*163*	*289*	*300*
6		60	*20,2*	*8,3*	*5,8*	*167*	*265*	*327*
7		65	*19,7*	*8,5*	*5,2*	*170*	*244*	*355*
8	6V	70	19	*8,5*	*4,7*	*172*	*227*	*386*	*R=160*
9		80	*16,8*	*8,3*	*3,6*	*175*	*199*	*437*
10		90	*14,6*	7	*2,8*	*177*	*176*	*492*
11		*100*	13	*7,7*	*2,2*	*179*	*159*	*546*
12		*120*	*10,5*	*7,2*	*1,4*	*182*	*132*	*655*
13		*140*	*8,5*	*6,9*	1	*185*	*113*	*764*
14		*160*	*7,2*	*6,7*	*0,7*	*187*	99	*864*
15		*200*	*5,5*	*6,5*	*0,4*	*191*	79	*1092*

Wzory do oblicze :

Xl=*L,

Xc=1/ *C,

Z="R*(Xl-Xc),

Tabela 1.2

*R=160*
LP	Uz	f	I	Z	C
	V	Hz	mA
1		20	*17,9*	*186*
2		30	*15,2*	*179*
3		40	*12,9*	*173*
4		42	*12,5*	*172*
5		44	*12,1*	*171*
6		46	*11,9*	*169*
7		48	*11,7*	*168*
8	6V	50	*11,6*	*166*	*C=10*F
9		55	*11,6*	*163*
10		60	*12,1*	*167*
11		70	*14,2*	*172*
12		80	*17,3*	*175*
13		90	*21,2*	*177*
14		*110*	*28,7*	*181*
15		*130*	34	*184*
16		*160*	47	*187*
1		20	33	*178*
2		25	27	*173*
3		30	*19,2*	*171*
4		35	*14,1*	*168*
5		36	*13,2*	*167*
6		38	*11,2*	*165*
7		40	*10,5*	*162*
8	6V	42	*10,1*	*162*	*C=18*F
9		44	*10,5*	*166*
10		46	*11,1*	*167*
11		48	*12,2*	*168*
12		50	*13,8*	*169*
13		55	*17,3*	*171*
14		60	*21,4*	*173*
15		70	22	*175*
16		80	28	*178*
17		*100*	49	*182*
18		*120*	64	*185*
19		*140*	78	*186*
20		*160*	82	*188*
21		*200*	*120*	*190*

Wzory i obliczenia:

Z="R*(Xl-Xc),

Charakterystyki:

Wykres1.Przebiegi prdu , napicia Url i Uc w obwodzie szeregowym RLC.

Wykres2.Przebiegi Z, Xc, Xl w obwodzie szeregowym RLC.

Wykres3.Przebieg prdu oraz impedancji Z w obwodzie RLC r�wnolegym.

Wykres 4. Przebieg prdu i impedancji Z w obwodzie RLC r�wnolegym(C=18F).

WNIOSKI:

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