cannot get expe cted result
165 7
redsunwit 8 months ago
hello, I design a piece of circuit in the following first image in easyeda for simulation. the purpose is that i just want to get 72Khz signals from power line (AC power with 220-110v 60hz) but when i simulate is with AC analysis , i get the following second image. so sad, ....  actually, i want to get the following third image. hope some one can help me. i am a freshman to do this. ![Screenshot from 2019-05-29 23-09-02.png](//image.easyeda.com/pullimage/VhYIbzWXSmZqxgKYtcYnWfynEOJPDTp53q4VqWfn.png) ![Screenshot from 2019-05-29 23-14-08.png](//image.easyeda.com/pullimage/8aXv6Sb62p1zryQ8fE9pY68KHXlvRdE2bRip6lpN.png) ![Screenshot from 2019-05-29 23-14-26.png](//image.easyeda.com/pullimage/TRwLxqcungGNSatsUZxVaP4TnrocKoceAjZ9MeWT.png)
Comments
andyfierman 8 months ago
Some of the plotting in WaveForm is not very good and needs to be improved but although the results that you get in EasyEDA for your coupler circuit: ![image.png](//image.easyeda.com/pullimage/6Our5AiruP9iTZaICV7euQe3oI6h202f7XO7xaYl.png) are not well plotted: ![image.png](//image.easyeda.com/pullimage/ZrkvJPBUlGvc6xGJqTkzQnSqApcDB3D29Fa8aBzI.png) but they are basically the same as in LTspice: ![image.png](//image.easyeda.com/pullimage/5GcMwwag0w1mwpAYi1Een2MNdnpGpeKacSnsoUZL.png) Even if you plot the magnitude linearly: ![image.png](//image.easyeda.com/pullimage/ntUhKoHtamQSVOhyNkxrUjsmcglWOGmh2rQMGtqk.png)
Reply
redsunwit 8 months ago
Thanks a lot. i have a following question. how can i get the following result, which is from the internet. (AC Power is 220-110v, 50-60Hz. how can the following circuit  just show us frequency around 72khz?) ![Screen Shot 2019-05-30 at 13.39.28.png](//image.easyeda.com/pullimage/4dtwRBelGXJsdcuHV5Jga1oIsaGnPaHTEd7HCuVV.png)
Reply
redsunwit 8 months ago
hi all, i have figured it out. thanks a lot .
Reply
andyfierman 8 months ago
@redsunwit, Where on the internet? Please post the link to it. I have already demonstrated that the Bode plot you have posted is not for the circuit you have posted. Where does the 11.5kV come from? How is the voltage source set up?
Reply
redsunwit 8 months ago
@andyfierman Hello, thanks for continuing discussing and concerning. the link is as follows. I am sorry that I am a freshman about PCB design. after i try to add a transformer to the above circuit and simulate it in ltspice. i get the expected result (only 27khz signal is allowed). [http://www.candrian.gr/index.php/category/microcontrollers/avr/power-line-communication/](http://www.candrian.gr/index.php/category/microcontrollers/avr/power-line-communication/)
Reply
redsunwit 8 months ago
@andyfierman I use ltspice  to simulate the coupler in above website. and the result is as follows. when i use transformer with 1.4m, 1.4m for each inductor of transformer. the circuit can just allow 13khz rather than 27khz. ![Screenshot from 2019-05-31 15-29-47.png](//image.easyeda.com/pullimage/hLQvjpduNoykz2GfuabqzV3xJuCRUQmZeI0yf9H3.png)
Reply
andyfierman 8 months ago
@redsunwit, With all due respect, sorry but these are questions for the author of the web pages: [http://www.candrian.gr/index.php/category/microcontrollers/avr/power-line-communication/](http://www.candrian.gr/index.php/category/microcontrollers/avr/power-line-communication/)
Reply
Login or Register to add a comment
goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.