{"id":47307,"date":"2021-07-23T08:52:17","date_gmt":"2021-07-23T08:52:17","guid":{"rendered":"https:\/\/www.dewetron.com\/news\/drei-grundlagen-der-elektrotechnik\/"},"modified":"2025-02-11T19:03:53","modified_gmt":"2025-02-11T19:03:53","slug":"drei-grundlagen-der-elektrotechnik","status":"publish","type":"post","link":"https:\/\/www.dewetron.com\/de\/news\/drei-grundlagen-der-elektrotechnik\/","title":{"rendered":"Drei Grundlagen der Elektrotechnik"},"content":{"rendered":"<div id=\"\" class=\"wp-block-text-columns margin-bottom-small\n      \">\n  <div class=\"container\">\n    <div class=\"row justify-content-center\">\n              <div class=\"col-12\">\n          <h2><\/h2>\n          <div class=\"content-size-normal\">\n            <p>Jede Woche berichten wir Ihnen interessante Fakten \u00fcber die Messtechnik, unsere <a href=\"https:\/\/www.dewetron.com\/de\/produkte\/\" target=\"_blank\" rel=\"noopener\">Test- und Messsysteme<\/a> oder stellen Ihnen n\u00fctzliche <a href=\"https:\/\/www.dewetron.com\/de\/produkte\/software\/oxygen-uebersicht\/\" target=\"_blank\" rel=\"noopener\">OXYGEN<\/a>-Features vor. Heute m\u00f6chten wir einen Schritt zur\u00fcckgehen und einige Grundlagen erkl\u00e4ren, auf denen die Messtechnik aufbaut \u2013 Grundlagen der Elektrotechnik.<\/p>\n<p>Parameter zu messen, klingt so einfach, nicht wahr? Ist es tats\u00e4chlich auch. Es wird aber noch einfacher, wenn man die physikalischen Gesetze dahinter kennt.<\/p>\n<p>Drei physikalische Gr\u00f6\u00dfen, die Ihnen in der Test- und Messtechnik immer wieder begegnen werden, sind Spannung, Widerstand und Strom. Das sogenannte Ohm\u2019sche Gesetz erkl\u00e4rt, wie diese drei Gr\u00f6\u00dfen zusammenh\u00e4ngen.<\/p>\n\n          <\/div>\n        <\/div>\n          <\/div>\n  <\/div>\n<\/div>\n\n\n<div id=\"\" class=\"wp-block-text-columns margin-bottom-small\n      \">\n  <div class=\"container\">\n    <div class=\"row justify-content-center\">\n              <div class=\"col-12\">\n          <h2>Das Ohm&#8217;sche Gesetz<\/h2>\n          <div class=\"content-size-normal\">\n            <p>Das Ohm\u2019sche Gesetz wurde vom deutschen Physiker Georg Simon Ohm im Jahr 1826 zu Papier gebracht. Es ist in der Elektrotechnik unverzichtbar. Er hat folgendes definiert: Hat man einen fixen Widerstand und belastet ihn mit zwei unterschiedlichen Spannungen, dann steigt oder sinkt der Strom im Verh\u00e4ltnis zur Spannung.<\/p>\n<p>Verwenden Sie hingegen eine fixe Spannung und ver\u00e4ndern den Widerstand, dann wird der Strom bei gr\u00f6\u00dferem Widerstand kleiner und bei kleinem Widerstand gr\u00f6\u00dfer.<br \/>\n&nbsp;<\/p>\n<p style=\"text-align: center;\"><strong>Eine einfache Formel beschreibt das Ohm\u2019sche Gesetz:<\/strong><\/p>\n<p style=\"text-align: center;\">U = R * I<\/p>\n<p style=\"text-align: center;\">Spannung [V] = Widerstand [\u03a9] * Strom [A]<\/p>\n\n          <\/div>\n        <\/div>\n          <\/div>\n  <\/div>\n<\/div>\n\n\n<div id=\"\" class=\"wp-block-text-columns margin-bottom-small\n      \">\n  <div class=\"container\">\n    <div class=\"row justify-content-center\">\n              <div class=\"col-12\">\n          <h2>Die Kirchhoff\u2019schen Regeln<\/h2>\n          <div class=\"content-size-normal\">\n            <p>Bei allen Berechnungen in elektrischen Schaltungen kommen die Kirchhoff\u2019schen Regeln zum Einsatz. Diese wurden vom deutschen Physiker Robert Kirchhoff erforscht und sind im Bereich der Elektrotechnik ebenso wichtig.<\/p>\n\n          <\/div>\n        <\/div>\n          <\/div>\n  <\/div>\n<\/div>\n\n\n<div id=\"\" class=\"wp-block-text-columns margin-bottom-small\n      \">\n  <div class=\"container\">\n    <div class=\"row justify-content-center\">\n              <div class=\"col-12\">\n          <h2>Erste Kirchhoff&#8217;sche Regel<\/h2>\n          <div class=\"content-size-normal\">\n            <p>Die erste Kirchhoff\u2019sche Regel wird auch Knotenregel genannt. Bei der Parallelschaltung von Widerst\u00e4nden entstehen Verzweigungspunkte, die man als Knotenpunkte des elektrischen Stromes bezeichnet. In jedem dieser Knotenpunkte ergibt die Summe aller zuflie\u00dfenden Str\u00f6me die Summe aller abflie\u00dfenden Str\u00f6me.<\/p>\n<p>Mathematisch l\u00e4sst sich dieses Gesetz wie folgt darstellen:<br \/>\n&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-22213\" title=\"erste-kirchhoffsches-gesetz\" src=\"https:\/\/www.dewetron.com\/app\/uploads\/2024\/09\/kirchhoff_1_web.png\" alt=\"kirchhoffs-first-law\" width=\"866\" height=\"280\" \/><\/p>\n\n          <\/div>\n        <\/div>\n          <\/div>\n  <\/div>\n<\/div>\n\n\n<div id=\"\" class=\"wp-block-text-columns margin-bottom-small\n      \">\n  <div class=\"container\">\n    <div class=\"row justify-content-center\">\n              <div class=\"col-12\">\n          <h2>Zweite Kirchhoff&#8217;sche Regel<\/h2>\n          <div class=\"content-size-normal\">\n            <p>Die zweite Kirchhoff\u2019sche Regel nennt man auch Maschenregel. In einem geschlossenen Stromkreis \u2013 einer sogenannten Masche \u2013 stellt sich eine bestimmte Spannungsverteilung ein. Die Summe aller Teilspannungen ergibt den Wert der Gesamtspannung. Die Summe der Quellspannung ist also gleich der Summe aller Spannungsabf\u00e4lle.<\/p>\n<p>Die folgende Grafik erkl\u00e4rt, wie die zweite Kirchhoff\u2019sche Regel funktioniert:<br \/>\n&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-22216\" title=\"zweites-kirchhoffsches-gesetz\" src=\"https:\/\/www.dewetron.com\/app\/uploads\/2024\/09\/kirchhoff_2_web.png\" alt=\"kirchhoffs-second-law\" width=\"866\" height=\"280\" \/><\/p>\n\n          <\/div>\n        <\/div>\n          <\/div>\n  <\/div>\n<\/div>\n\n\n<div id=\"\" class=\"wp-block-text-columns margin-bottom-none\n      \">\n  <div class=\"container\">\n    <div class=\"row justify-content-center\">\n              <div class=\"col-12\">\n          <h2>Mehr Grundwissen<\/h2>\n          <div class=\"content-size-normal\">\n            <p>Abschlie\u00dfend m\u00f6chten wir noch hinzuf\u00fcgen, dass Spannung die treibende Kraft ist, damit Strom \u00fcberhaupt in einem Stromkreis flie\u00dfen kann. Eine wichtige Elektrotechnik-Regel, die man sich merken sollte!<\/p>\n<p>Mit unseren <a href=\"https:\/\/www.dewetron.com\/de\/produkte\/\" target=\"_blank\" rel=\"noopener\">Test- und Messsystemen<\/a> ist es sehr einfach, jede einzelne der beschriebenen physikalischen Gr\u00f6\u00dfen zu bestimmen \u2013 auch in sehr komplexen Arbeitsumgebungen. Bei Ihrer n\u00e4chsten Messaufgabe werden Sie sich nun vielleicht an die Grundlagen der Elektrotechnik erinnern, die Sie wahrscheinlich zuletzt in der Schule oder Universit\u00e4t geh\u00f6rt haben.<br \/>\n&nbsp;<\/p>\n\n          <\/div>\n        <\/div>\n          <\/div>\n  <\/div>\n<\/div>\n\n\n<div id=\"\" class=\"wp-block-claim-links-gray margin-bottom-none\">\n  <div class=\"container-fluid bg-container py-7 bg-darkgray\">\n    <div class=\"container position-relative\">\n      <div class=\"claim col-12 col-lg-8 offset-lg-2 text-center text-light\">\n                  <h3 class=\"h3 text-uppercase\">ERFAHREN SIE MEHR VON UNSEREN MESSL\u00d6SUNGEN<\/h3>\n                                  <div class=\"link-button d-flex flex-wrap mt-4 justify-content-center gap-4\">\n                          <a\n    class=\"dewetron-btn\"\n    href=\"https:\/\/www.dewetron.com\/de\/produkte\/\"\n          >\n          \n      <span>UNSERE MESSL\u00d6SUNGEN<\/span>\n      <\/a>\n                 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