Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Engineering and Comp Sci Homework Help
Instantaneous current in stator of 3 phase IM
Reply to thread
Message
[QUOTE="cnh1995, post: 5929558, member: 552336"] As anorlunda said, they are just shifted by 90 degrees. It doesn't make any difference if you use cos instead of sine. All the other equations will change accordingly. For example, if the current through an inductor is I[SUB]m[/SUB]sin(ωt), the voltage across the inductor will be Ldi/dt=ωLI[SUB]m[/SUB]cos(ωt). Here the current is lagging the voltage by 90° (which is expected.) If the current were I[SUB]m[/SUB]cos(ωt), the voltage across the inductor would be -ωLI[SUB]m[/SUB]sin(ωt). The current still lags the voltage by 90° . Work out some examples on your own and you'd realize the importance of sine wave in ac electricity. The derivatives and integrals of a sine wave are also sine waves with a phase-shift (cos is sine with 90 degrees phase shift). This important property simplifies the math required to analyse ac circuits. (Although it "simplifies" the math, it's called "complex" analysis:wink:). [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Engineering and Comp Sci Homework Help
Instantaneous current in stator of 3 phase IM
Back
Top