Page 46 - index

2-ɦɵɫɚɥ. ɋɚɥɦɚԑɵ Q 1ɤɇ ɛɿɪɬɟɤɬɿ ɚɪԕɚɥɵԕ ԧɡɿɧɿԙ Ⱥ ԕɢɦɚɫɵ ɚɪԕɵɥɵ

ɬɨɩɫɚɦɟɧ ɛɟɤɿɬɿɥɿɩ, ɚɥ ɨɧɵԙ ɋ ɧԛɤɬɟɫɿ ɠɵɥɬɵɪ ԕɚɛɵɪԑɚԑɚ ɬɿɪɟɥɿɩ ԕɨɣɵɥԑɚɧ.
Ⱥɪԕɚɥɵԕԕɚ ɦɨɦɟɧɬɿ Ɇ=1000ɧɦ ԕɨɫ ɤԛɲ ɠԥɧɟ ɫɨɧɵɦɟɧ ɛɿɪɝɟ 450

ɛԝɪɵɲɩɟɧ ɛɚԑɵɬɬɚɥԑɚɧ Ɋ 4ɤɇ ɤԛɲɿ ԥɫɟɪ ɟɬɟɞɿ (42-ɫɭɪɟɬ). Ȼɟɪɿɥɝɟɧɿ: AB =
a =8ɦ ɠԥɧɟ AC = 3/4a=6ɦ (42 ɚ-ɫɭɪɟɬ). Ⱥ ɬɨɩɫɚɫɵɧɵԙ ɠԥɧɟ ɋ ɬɿɪɟɝɿɧɿԙ
ɪɟɚɤɰɢɹɥɚɪɵɧ ɬɚɛɭ ɤɟɪɟɤ.

ɒɟɲɭɿ. Ⱥɪԕɚɥɵԕɬɵԙ ɬɟɩɟ-ɬɟԙɞɿɝɿɧ ԕɚɪɚɫɬɵɪɚɦɵɡ. Ɉɥ ԛɲɿɧ, ԥɫɟɪ ɟɬɭɲɿ
ɛɚɪɥɵԕ ɤԛɲɬɟɪ (ɛɟɪɿɥɝɟɧ ɠԥɧɟ ɪɟɚɤɰɢɹ ɤԛɲɬɟɪɿ) ɤԧɪɫɟɬɿɥɝɟɧ, ɚɪԕɚɥɵԕɬɵԙ
ɟɫɟɩɬɟɭ ɧԝɫԕɚɫɵɧ ɤɟɥɬɿɪɟɦɿɡ (42 Ω-ɫɭɪɟɬ). ɋ ɬɿɪɟɝɿɧɿԙ ɪɟɚɤɰɢɹɫɵɧɵԙ ( RC )

ɠɨԑɚɪɵ ԕɚɪɚɣ ɬɿɤ ɛɚԑɵɬɬɚɩ, ɚɥ Ⱥ ɬɨɩɫɚɫɵɧɵԙ ɪɟɚɤɰɢɹɫɵɧ ɟɤɿ ԕԝɪɚɭɲɵԑɚ
( RA, H A ) ɠɿɤɬɟɩ, ɨɥɚɪɞɵ ɫɭɪɟɬɬɟ ɤԧɪɫɟɬɿɥɝɟɧɞɟɣ ɟɬɿɩ ɛɚԑɵɬɬɚɣɦɵɡ.

42-ɫɭɪɟɬ

Ʉɨɨɪɞɢɧɚɬɬɚɪ ɠԛɣɟɫɿɧ 42 Ω-ɫɭɪɟɬɿɧɞɟ ɤԧɪɫɟɬɿɥɝɟɧɞɟɣ ɟɬɿɩ ɚɥɚɦɵɡ ɞɚ,
ɬɟɩɟ-ɬɟԙɞɿɤ ɬɟԙɞɟɭɥɟɪɿɧ ԕԝɪɚɦɵɡ:

¦ X 0; H A P ˜ cosD 0,

¦ mA (Pi ) 0; Q ˜ AD P ˜ AK M RC ˜ AC 0,

¦ mC (Pi ) 0; Q ˜CD RA ˜ AC P ˜CL M 0 .
ȿɫɤɟɪɬɭ. Ԕɨɫ ɤԛɲ ɦɨɦɟɧɬɿɧɿԙ ɤɟɡ ɤɟɥɝɟɧ ɨɫɶɤɟ ɩɪɨɟɤɰɢɹɫɵ ɧԧɥɝɟ ɬɟԙ
ɛɨɥɚɞɵ.

AKB ɠԥɧɟ CLB ɬɿɤ ɛԝɪɵɲɬɵ ԛɲɛԝɪɵɲɬɚɪɵɧɚɧ: AK a ˜sinD ,

CL a ˜ sin D . Ɉɫɵ ɦԥɧɞɟɪɞɿ ɠɨԑɚɪɵɞɚԑɵ ɬɟԙɞɟɭɥɟɪɝɟ ԕɨɣԑɚɧɧɚɧ ɤɟɣɿɧ:
4

RA 1 ˜ (Q P ˜ sin D ) 4˜M 773 ɧ,
3 3˜a

Rc 2 ˜ (Q 2P ˜ sin D ) 4˜M 4600 ɧ,
3 3˜a

H A P ˜ cosD 2830 ɧ.

RA, H A - ɪɟɚɤɰɢɹɥɚɪɵɧɵԙ ɦɢɧɭɫ ɬɚԙɛɚɥɚɪɵ, ɨɥɚɪɞɵԙ ɿɫ ɠԛɡɿɧɞɟɝɿ
ɛɚԑɵɬɬɚɪɵ, ɫɭɪɟɬɬɟ ɤԧɪɫɟɬɿɥɝɟɧ ɛɚԑɵɬԕɚ ԕɚɪɚɦɚ-ԕɚɪɫɵ ɛɚԑɵɬɬɚɥԑɚɧɵɧ
ɤԧɪɫɟɬɟɞɿ.

44