[Prev][Next][Index][Thread]
Re: ignition coil - scr
From: William Noble[SMTP:William_B_Noble-at-msn-dot-com]
Sent: Tuesday, July 29, 1997 12:17 AM
To: Tesla List
Subject: RE: ignition coil - scr
apparently it wasn't obvious, but in the circuit I described, the current flow
through the SCR will charge the inductance in the coil and then when the cap
is discharged, then the current flow will stop with the core of the coil
magnetized. The collapsing magnetic field will cause voltage in the windings
which will attempt to reverse the current flow through the capacitor, turning
the SCR off nicely and then (if you put a regular diode in the circuit biased
opposite the SCR) charge up the capacitor again (part way)
snip>
> How do you switch the SCR off , it can't be switched off with 0V in the
gate.
> ----------------------------
> Kenneth Aaron
> E-mail : kennetha-at-geocities-dot-com
> http://www.geocities-dot-com/SunsetStrip/8736/
> ----------------------------
>
You must interrupt the current from cathode to anode on an SCR to turn it
off. Once biased on, it is a diode until current stops.
hope this helps...
Michael Smith
md.smith-at-usa-dot-net