Re: Does an electromagnet lag its input?
- From: John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 27 Feb 2008 15:37:02 -0800
On Tue, 26 Feb 2008 12:46:47 -0800 (PST), sid <sylvestersn@xxxxxxxxx>
wrote:
If I'm sending a 60 Hz sine wave to an electromagnet (inductor), then
won't the current through the coil lag the input voltage by 90 deg?
It will lag, but by somewhat less than 90 degrees. It depends on the L
and R values.
So if the magnetic field depends basically on the current and the
number of turns, the pull of the magnet will lag the input voltage by
a quarter-cycle, won't it?
The pull on a nonmagnetized object is according to the absolute velue
of the coil current, modified by various complicated magnetic effects.
Because of my application, I'd like for the input wave, as seen on the
scope, to match the timing of the magnetic pull. Is there a way to
compensate for the lag, like with a capacitor or something? Sid
A series cap can resonate out the inductance, and can potentially
swing the coil current from lag to zero to lead, depending. It can
also increase the current, maybe by a lot.
John
.
- References:
- Does an electromagnet lag its input?
- From: sid
- Does an electromagnet lag its input?
- Prev by Date: basic elapsed seconds counter
- Next by Date: Re: How do I hook up my potentiometer?
- Previous by thread: Re: Does an electromagnet lag its input?
- Next by thread: Dry Irons
- Index(es):
Relevant Pages
|
|
