{"id":163,"date":"2018-07-31T14:44:21","date_gmt":"2018-07-31T18:44:21","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/?post_type=chapter&p=163"},"modified":"2019-01-28T13:11:18","modified_gmt":"2019-01-28T18:11:18","slug":"how-a-waveform-is-generated","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/chapter\/how-a-waveform-is-generated\/","title":{"raw":"How a Waveform Is Generated","rendered":"How a Waveform Is Generated"},"content":{"raw":"

AC generation with an alternator<\/h1>\r\nIf Faraday has taught us anything it is this: \u00a0Any time you pass a conductor through a magnetic field, you induce a voltage.\u00a0\u00a0If we take that conductor and turn it into a loop and spin it continually through that magnetic field, we have created an alternator.\r\n\r\n[caption id=\"attachment_157\" align=\"aligncenter\" width=\"300\"]\"\"<\/a> Figure 50. Alternator picture<\/strong>[\/caption]\r\n\r\nThis means that a voltage will constantly be induced. \u00a0However, this is not a flat line voltage like direct current.\u00a0\u00a0It creates an oscillating voltage that rises and falls.\r\n

Is this what you mean by sine wave generation?<\/h1>\r\nYup, this is exactly what I mean.\u00a0\u00a0As the conductor spins through the field, there will be times that it does not cut any lines of flux. \u00a0There will be times when it cuts some of the lines of flux, and there will be times that it is cutting the maximum amount of flux lines that it can.\u00a0\u00a0This means that at some point during the sine wave generation there will be no voltage generated. \u00a0Then there will be some voltage generated, and then there will be a maximum voltage generated.\u00a0\u00a0This creates this thing of beauty.\u00a0 A sine wave.\r\n\r\n[caption id=\"attachment_219\" align=\"aligncenter\" width=\"300\"]\"\"<\/a> Figure 51. Sine wave<\/strong>[\/caption]\r\n

Oh yeah, I think I have seen that before<\/h1>\r\nThis wave\u00a0pattern occurs often in nature, including ocean waves, sound\u00a0waves and light\u00a0waves. \u00a0In fact, if you take the hours of daylight in a day and graph it out with the months of the year, guess what? \u00a0A sine wave is generated. \u00a0If you\u2019d like to read an interesting article on the seasons and sine wave generation, read Calculus of the seasons<\/a>.\u00a0 Isn\u2019t nature cool?\u00a0\u00a0But I digress.\u00a0\u00a0This sine wave is extremely important when it comes to electrical generation.\u00a0 Future postings will discuss its importance and go into in-depth analysis of the waveform.\r\n
\r\n

Video!<\/strong><\/p>\r\n\r\n<\/header>\r\n

\r\n

This video explains how a sine wave is generated in an alternator.<\/p>\r\n\r\n

\r\n\r\n[embed] https:\/\/youtu.be\/L_m1mAY6WZ4 [\/embed]\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n

Sounds like fun<\/h1>\r\nOh, it\u2019s fun all right.\u00a0\u00a0Trust me.\u00a0 If you find this stuff interesting, it becomes a lot easier to learn and understand.\u00a0 (Fatherly lecture over).\u00a0\u00a0If you have a foundational understanding of this concept, then single phase and three-phase generation should be a snap.\r\n

Attributions<\/h1>\r\nSine wave generation<\/a>. video by\u00a0<\/span>The Electric Academy<\/a>\u00a0is under a\u00a0<\/span>Creative Commons Attribution Licence<\/a>.<\/span>","rendered":"

AC generation with an alternator<\/h1>\n

If Faraday has taught us anything it is this: \u00a0Any time you pass a conductor through a magnetic field, you induce a voltage.\u00a0\u00a0If we take that conductor and turn it into a loop and spin it continually through that magnetic field, we have created an alternator.<\/p>\n

\"\"<\/a>
Figure 50. Alternator picture<\/strong><\/figcaption><\/figure>\n

This means that a voltage will constantly be induced. \u00a0However, this is not a flat line voltage like direct current.\u00a0\u00a0It creates an oscillating voltage that rises and falls.<\/p>\n

Is this what you mean by sine wave generation?<\/h1>\n

Yup, this is exactly what I mean.\u00a0\u00a0As the conductor spins through the field, there will be times that it does not cut any lines of flux. \u00a0There will be times when it cuts some of the lines of flux, and there will be times that it is cutting the maximum amount of flux lines that it can.\u00a0\u00a0This means that at some point during the sine wave generation there will be no voltage generated. \u00a0Then there will be some voltage generated, and then there will be a maximum voltage generated.\u00a0\u00a0This creates this thing of beauty.\u00a0 A sine wave.<\/p>\n

\"\"<\/a>
Figure 51. Sine wave<\/strong><\/figcaption><\/figure>\n

Oh yeah, I think I have seen that before<\/h1>\n

This wave\u00a0pattern occurs often in nature, including ocean waves, sound\u00a0waves and light\u00a0waves. \u00a0In fact, if you take the hours of daylight in a day and graph it out with the months of the year, guess what? \u00a0A sine wave is generated. \u00a0If you\u2019d like to read an interesting article on the seasons and sine wave generation, read Calculus of the seasons<\/a>.\u00a0 Isn\u2019t nature cool?\u00a0\u00a0But I digress.\u00a0\u00a0This sine wave is extremely important when it comes to electrical generation.\u00a0 Future postings will discuss its importance and go into in-depth analysis of the waveform.<\/p>\n

\n
\n

Video!<\/strong><\/p>\n<\/header>\n

\n

This video explains how a sine wave is generated in an alternator.<\/p>\n

\n