Lecture 4: Power Factor

Comments · 109

• ST

  @stratfanstl · 2 years ago

  In my EE curriculum, another 3 lectures would have been spent on exhaustively reproving the calculus behind the orthoganality of sinusoidal waveforms.  And no student would have emerged with any intuition about how to use that fact in solving an actual design problem.  Great material in this series.

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• DO

  @donmoore7785 · 2 years ago

  This is an excellent course, and great instructor.

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• WE

  @WeaselVaughn · 2 years ago

  This camera man deserves a raise.

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• WE

  @weletronico · 1 year ago

  I'm technician in Brazil and I'm using this to expande my view on power electronics and learn more about the area I work. Thank you guys for sharing this 💪

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• PY

  @pyro-millie5533 · 2 years ago

  Yo I work in the lighting industry, and so many things mentioned in this lecture are things we work with every day! We have a whole characterization test we run on LED drivers (switch mode power supplies that are usually programmable) to determine if power factor and total harmonic distortion are within spec! I’d have to look at some standards to see what the minimum allowed PF is for approval, but I’ve seen it as high as 98-99% for most drivers running in their expected operating range. It gets ugly if you program the current really low and put small loads on them though. Which is really interesting to me. <br><br>So cool to see where these calculations come from and get a better understanding of what they measure! Loving this lecture series so far!

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• HA

  @HandyMikePlano · 2 years ago

  Great instructor. It&apos;s been many years since I graduated with my BSEE but I’m picking it up quickly thanks to the great instructor!

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• SH

  @shaktisampadswain1864 · 1 year ago

  After 4 years of electrical engineering today i learned what reactive power is and why we need to calculate power factor

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• KH

  @KHMakerD · 9 months ago

  Blessed to live in a world where I can learn so easily.

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• S_

  @s_s-g4d · 8 months ago

  <a href="https://www.youtube.com/watch?v=-r0hWGcNLSI&amp;t=2850">47:30</a> I instinctively reached for the trigger position knob on my oscilloscope.

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• PR

  @PROShineKITO · 1 year ago

  Dr. David Perreault at his best explaining a &quot;complicated&quot; concept such power factor in a magistral way!

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• AJ

  @AjedrezAnalítico · 2 years ago

  Thanks for making this public. As an &nbsp;Electrical Engineer, it is a pretty beautiful class.

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• AR

  @Arpitpatel-q5n · 4 months ago

  Now the camera man knows power elecronics better than us.

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