Mixing AC and DC
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Adam_Winstone
- registered user
- Posts: 1693
- Joined: Tue Jan 31, 2012 8:54 pm
- Main scooter: Lambretta GP
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^... excellent, the penny drops! That's what I need... electrics made simple
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Pepot
- Posts: 73
- Joined: Sun Aug 05, 2012 10:45 pm
- Main scooter: servetta LI150 serieIII GT186
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You can use a common earth for AC and DC as long as you don´t use a "full wave" rectifier.Most bikes use a "half wave" rectifier.This means that the DC electric flow has ciclic "cuts".
Thats a half wave rctifier:http://www.visionics.a.se/html/curricul ... age206.gif
And thats a ful cicle rectifier:http://upload.wikimedia.org/wikipedia/c ... Filter.png
If in an AC circuit (witout battery) you want to use some accesori that needs DC and use a full cicle rectifier DON´T earth it to the AC earth!!!.In this case you must isolate both wires + and - from the bike body.
Thats a half wave rctifier:http://www.visionics.a.se/html/curricul ... age206.gif
And thats a ful cicle rectifier:http://upload.wikimedia.org/wikipedia/c ... Filter.png
If in an AC circuit (witout battery) you want to use some accesori that needs DC and use a full cicle rectifier DON´T earth it to the AC earth!!!.In this case you must isolate both wires + and - from the bike body.