I know no current flows through the secondary side (which lets us ignore the series components), but why would that enable us to ignore the series resistive & reactive components on the primary side?
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\$\begingroup\$ What series components, could you be more specific? \$\endgroup\$– Tim WilliamsJun 7 at 17:56
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\$\begingroup\$ Hey Tim, thanks for the quick response -- please see the blue circle in the following image: imgur.com/a/NFo4wzb \$\endgroup\$– Omeed12Jun 7 at 17:59
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\$\begingroup\$ Please add details by editing your post -- thanks! \$\endgroup\$– Tim WilliamsJun 7 at 18:00
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\$\begingroup\$ No problem, done! \$\endgroup\$– Omeed12Jun 7 at 18:01
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\$\begingroup\$ What's your understanding of this circuit -- did you find it, were you told to use it, have you derived it yourself, etc.? Are you familiar with non-ideal transformers? \$\endgroup\$– Tim WilliamsJun 7 at 18:03
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2 Answers
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Typical real general-purpose transformers have | Lm || Xc | >> | Lp + Rp | so you can consider Lp + Rp a short for the purposes of approximately determining the magnetizing current and the output voltage.
answered Jun 7 at 18:38
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I know no current flows through the secondary side (which lets us ignore the series components), but why would that enable us to ignore the series resistive & reactive components on the primary side?
The series components \$L_P\$ and \$R_P\$ on the primary side are still passing magnetization current into \$L_M\$ therefore, those series components produce a volt-drop.
Hence, in many situations we don't ignore them.
