How does single-phase and three-phase current work exactly, and whats the difference?

297 views

Hey everyone,

I’m getting into electric speciality and, to be honest, never understood (made it clear in my head) how does AC or DC work, why there are three/single phases used?

by „Make clear in my head” I mean I generally have some knowledge, but couldn’t be able to explain it to somebody else. Thanks!

In: 5

5 Answers

Anonymous 0 Comments

Think of bike pedals on a bike. There’s a downward driving stroke with one foot while the other foot is opposite. Eventually that foot will be the driving stroke. But there are periods where neither foot is adding driving force in a significant manner. That’s single phase power.

Now imagine that same bike with 3 seats and pedals with each set of petals offset so that at any one time, one of three right legs is giving a downward driving stroke and then one of three left legs is giving a downward driving stroke. That’s three phase power.

You can have all three pedals drive the same wheel or (the analogy breaks down here a bit) they can all use the same chain but each power it’s own wheel.

You are viewing 1 out of 5 answers, click here to view all answers.