{"id":5380,"date":"2023-06-05T16:19:39","date_gmt":"2023-06-05T08:19:39","guid":{"rendered":"http:\/\/www.dcl-controls.com\/?p=5380"},"modified":"2025-03-31T09:18:37","modified_gmt":"2025-03-31T09:18:37","slug":"why-voltage-signal-oscillate","status":"publish","type":"post","link":"https:\/\/dclactuator.com\/lv_lv\/atbalsts\/ta-aktuators\/kapec-sprieguma-signals-svarstas","title":{"rendered":"K\u0101p\u0113c sprieguma izejas sign\u0101li sv\u0101rst\u0101s noteiktos apst\u0101k\u013cos?"},"content":{"rendered":"
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\u00a0<\/h3>

1. Sprieguma sign\u0101la p\u0101rraides ce\u013c\u0161<\/strong><\/h2>
\"1.
1. att\u0113ls. Sprieguma avota sign\u0101lu p\u0101rraides ce\u013c\u0161<\/figcaption><\/figure>

K\u0101 par\u0101d\u012bts 1. att\u0113ls<\/strong>, sprieguma sign\u0101la p\u0101rraides sist\u0113ma sast\u0101v no trim galvenaj\u0101m sast\u0101vda\u013c\u0101m:<\/p>

  1. Negat\u012bvas atgriezenisk\u0101s saites sprieguma izejas \u0137\u0113de<\/strong><\/p><\/li>

  2. Sign\u0101la p\u0101rraides kabelis<\/strong><\/p>

    • Iek\u013cauts parazit\u0101r\u0101 kapacit\u0101te (C1)<\/strong> un parazit\u0101r\u0101 induktivit\u0101te (L1)<\/strong>, kas ir atkar\u012bgi no kabe\u013ca garums<\/strong> un vadu izk\u0101rtojums<\/strong>.<\/p><\/li><\/ul><\/li>

    • Ievades sign\u0101la ieg\u016b\u0161anas sh\u0113ma<\/strong><\/p>

      • Var ietvert zemfrekvences filtrs (L2, C2)<\/strong>.<\/p><\/li><\/ul><\/li><\/ol>

        2. K\u0101p\u0113c rodas sv\u0101rst\u012bbas?<\/strong><\/h2>

        Negat\u012bvas atgriezenisk\u0101s saites sprieguma sign\u0101la sist\u0113m\u0101 ieejas sign\u0101ls tiek apr\u0113\u0137in\u0101ts k\u0101:<\/p>

        \u2223Xi\u2032\u2223=\u2223Xi\u2223\u2212\u2223Xf\u2223|X_i'| = |X_i| \u2013 |X_f|<\/span><\/p>

        Tom\u0113r, ja atgriezenisk\u0101s saites sign\u0101ls (|Xf|) ir f\u0101zes nob\u012bd\u012bts par 180\u00b0<\/strong>, vien\u0101dojums main\u0101s uz:<\/p>

        \u2223Xi\u2032\u2223=\u2223Xi\u2223+\u2223Xf\u2223|X_i'| = |X_i| + |X_f|<\/span><\/p>

        Tas noz\u012bm\u0113, ka pat ja nav ieejas sign\u0101la<\/strong> tiek piem\u0113rots (|Xi| = 0<\/strong>), atgriezenisk\u0101s saites sign\u0101ls uztur izeju<\/strong>, kas noved pie pa\u0161pietiekama sv\u0101rst\u012bba<\/strong>.<\/p>

        Lai notiktu sv\u0101rst\u012bbas, ir j\u0101izpilda divi nosac\u012bjumi:<\/p>

        1. Cilpas pastiprin\u0101jums ir liel\u0101ks par 1:<\/strong> |AF| > 1<\/strong><\/p><\/li>

        2. F\u0101zes nob\u012bde atbilst:<\/strong> \u03c6A + \u03c6F = (2n+1)\u03c0<\/strong><\/p><\/li><\/ol>

          The f\u0101zes nob\u012bde<\/strong> cilp\u0101 n\u0101k no vair\u0101kiem avotiem:
          \u2714 Paraz\u012btisk\u0101 kapacit\u0101te (C1) un induktivit\u0101te (L1) p\u0101rraides kabel\u012b<\/strong>
          \u2714 Zemfrekvences filtra komponenti (L2, C2) ieejas \u0137\u0113d\u0113<\/strong>
          \u2714 Filtra kondensatori izejas \u0137\u0113d\u0113<\/strong><\/p>

          Ja kop\u0113j\u0101 f\u0101zes nob\u012bde sasniedz 180\u00b0<\/strong>, var rasties pa\u0161sv\u0101rst\u012bbas.<\/p>

          3. K\u0101 nov\u0113rst sv\u0101rst\u012bbas?<\/strong><\/h2>

          Lai nov\u0113rstu sv\u0101rst\u012bbas, viens no diviem iepriek\u0161 min\u0113tajiem nosac\u012bjumiem nedr\u012bkst b\u016bt izpild\u012bts<\/strong> darb\u012bbas frekven\u010du diapazon\u0101.<\/p>

          \"2.
          2. att\u0113ls. Negat\u012bv\u0101s atgriezenisk\u0101s saites cilpas st\u0101voklis bez sv\u0101rst\u012bb\u0101m<\/figcaption><\/figure>

          K\u0101 par\u0101d\u012bts 2. att\u0113ls<\/strong>, tiek \u0146emtas v\u0113r\u0101 divas kritisk\u0101s frekvences:<\/p>

          • FC:<\/strong> Frekvence, kur\u0101 cilpas pastiprin\u0101jums |AF| samazin\u0101s l\u012bdz 0 dB<\/strong>.<\/p><\/li>

          • priek\u0161:<\/strong> Frekvence, kur\u0101 cilpas f\u0101zes nob\u012bde p\u0101rsniedz -180\u00b0<\/strong>.<\/p><\/li><\/ul>

            Lai saglab\u0101tu stabilit\u0101ti, pastiprin\u0101jumam j\u0101b\u016bt zem 0 dB<\/strong> kad f\u0101zes nob\u012bde sasniedz -180\u00b0.<\/p>

            4. K\u0101p\u0113c str\u0101vas izejas sign\u0101li ir stabil\u0101ki<\/strong><\/h2>
            \"3.
            3. att\u0113ls. Str\u0101vas avota atgriezenisk\u0101s saites cilpa<\/figcaption><\/figure>
            \"4.
            4. att\u0113ls. Sprieguma avota atgriezenisk\u0101s saites cilpa<\/figcaption><\/figure>

            Str\u0101vas sign\u0101la izejas sh\u0113mas<\/strong> ir maz\u0101k pak\u013cauti sv\u0101rst\u012bb\u0101m, jo:
            \u2714 To atgriezenisk\u0101s saites ce\u013c\u0161 ir ierobe\u017eots ar iek\u0161\u0113j\u0101m sast\u0101vda\u013c\u0101m<\/strong> (k\u0101 par\u0101d\u012bts 3. att\u0113ls<\/strong>).
            \u2714 \u0100r\u0113j\u0101m slodzes izmai\u0146\u0101m ir maza ietekme uz f\u0101zes nob\u012bdi vai pastiprin\u0101jumu<\/strong>.<\/p>

            Turpret\u012b, sprieguma izejas sh\u0113mas<\/strong> (4. att\u0113ls) sa\u0146emt atsauksmes no izejas punkts<\/strong>, kas noz\u012bm\u0113, ka \u0101r\u0113jie kabe\u013ci un paraugu \u0146em\u0161anas sh\u0113mas<\/strong> var ietekm\u0113t f\u0101zes nob\u012bdi un pastiprin\u0101jumu. Ja main\u0101s to parametri, sist\u0113ma var atbilst sv\u0101rst\u012bbu nosac\u012bjumiem<\/strong>, kas noved pie nestabilit\u0101tes.<\/p>

            5. Secin\u0101jums<\/strong><\/h3>

            Sprieguma tipa izejas sign\u0101li var sv\u0101rst\u012bties, ja:
            \u2714 Paraz\u012btiskie komponenti ievie\u0161 180\u00b0 f\u0101zes nob\u012bdi.<\/strong>
            \u2714 \u0160aj\u0101 f\u0101zes nob\u012bd\u0113 cilpas pastiprin\u0101jums saglab\u0101jas liel\u0101ks par 1.<\/strong><\/p>

            Lai izvair\u012btos no sv\u0101rst\u012bb\u0101m:
            \u2714 P\u0101rliecinieties, vai cilpas pastiprin\u0101jums ir samazin\u0101ts zem 0 dB, pirms f\u0101zes nob\u012bde sasniedz 180\u00b0.<\/strong>
            \u2714 Samaziniet paraz\u012btisko kapacit\u0101ti\/induktivit\u0101tes koeficientu p\u0101rraides kabe\u013cos.<\/strong>
            \u2714 Izmantojiet atbilsto\u0161u filtr\u0113\u0161anu, lai stabiliz\u0113tu atgriezenisk\u0101s saites cilpu.<\/strong><\/p>

            Turpret\u012b, str\u0101vas tipa izejas<\/strong> ir stabil\u0101ki, jo to atgriezenisk\u0101s saites cilpu maz\u0101k ietekm\u0113 \u0101r\u0113jie slodzes apst\u0101k\u013ci<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

            \u00a0 1. Sprieguma sign\u0101la p\u0101rraides ce\u013c\u0161 K\u0101 par\u0101d\u012bts 1. att\u0113l\u0101, sprieguma sign\u0101la p\u0101rraides sist\u0113ma sast\u0101v no trim galvenaj\u0101m sast\u0101vda\u013c\u0101m: Negat\u012bv\u0101s atgriezenisk\u0101s saites sprieguma izejas \u0137\u0113de Sign\u0101la p\u0101rraides kabelis Ietver parazit\u0101ro kapacit\u0101ti (C1) un parazit\u0101ro induktivit\u0101ti (L1), kas ir atkar\u012bgas no kabe\u013ca garuma un vadu izk\u0101rtojuma. Ieejas sign\u0101la uztver\u0161anas \u0137\u0113de Var ietvert zemfrekvences filtru (L2, [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":true,"footnotes":""},"categories":[8],"tags":[49],"class_list":["post-5380","post","type-post","status-publish","format-standard","hentry","category-ta-acutator","tag-input-signal"],"acf":[],"_links":{"self":[{"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/posts\/5380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/comments?post=5380"}],"version-history":[{"count":0,"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/posts\/5380\/revisions"}],"wp:attachment":[{"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/media?parent=5380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/categories?post=5380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dclactuator.com\/lv_lv\/wp-json\/wp\/v2\/tags?post=5380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}