Re: Charging inductors for resonant charging

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: jimmy hynes <chunkyboy86-at-yahoo-dot-com> 

In a DC resonant charging system, the voltage across the inductor is AC. 
The voltage across the
inductor changes polarity when the voltage across the capacitor goes from < 
VDC to > VDC. The
transformer should work without a gap, all the energy is stored in the low 
voltage inductor.
--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: Bert Hickman <bert.hickman-at-aquila-dot-net>
 >
 > Hmmm... you're right! I suppose that's why it sounded too easy!  :^)
 >
 > For a DC resonant charging system there appears to be no avoiding the need
 > for an air gap in the inductor's magnetic circuit. However, if the core of
 > a moderately sized DT could be cut to introduce an air gap, then this
 > approach might still have some merit. The approach would provide high BIL
 > and current handling and a means to external adjust the charging inductance
 > without resorting to a custom wound inductor. Now, the challenge becomes
 > how to cleanly cut the core of one of these beasts.
 >
 > -- Bert --
 >
 > Tesla list wrote:
 >
 > >Original poster: "gtyler" <gtyler-at-drummond-dot-org.za>
 > >Are you not using this choke on DC? If so the transformer will saturate.
 > >----- Original Message -----
 > >From: "Tesla list" <tesla-at-pupman-dot-com>
 > >To: <tesla-at-pupman-dot-com>
 > >Sent: Sunday, February 01, 2004 2:57 AM
 > >Subject: Re: Charging inductors for resonant charging
 > >
 > >  > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 > >  >
 > >  > Very, very clever... I like it!
 > >  > One could make a very sophsticated system if one wanted, and you'd be
 > >  > working at "reasonable" voltages
 > >  > ----- Original Message -----
 > >  > From: "Tesla list" <tesla-at-pupman-dot-com>
 > >  > To: <tesla-at-pupman-dot-com>
 > >  > Sent: Saturday, January 31, 2004 10:25 AM
 > >  > Subject: Re: Charging inductors for resonant charging
 > >  >
 > >  >
 > >  >  > Original poster: Bert Hickman <bert.hickman-at-aquila-dot-net>
 > >  >  >
 > >  >  > Ed, Jim and all,
 > >  >  >
 > >  >  > Here's an idea I was kicking around with Ed Wingate a while back.
 > >You
 > >  > could
 > >  >  > simply use another distribution transformer and ballast as a HV
 > >charging
 > >  >  > inductor. Use the HV winding in series as the charging inductor.
 > >Connect
 > >  >  > the low voltage side of the DT to high current ballast (welder or
 > >  >  > adjustable high current inductive ballast). The DT will multiply
 > >the LV
 > >  >  > side ballast inductance by its turns ratio squared, easily making
 > >the HV
 > >  >  > side look like a large, adjustable, HV inductor. And a properly
 > >sized DT
 > >  >  > already has the necessary BIL and current rating required.
 > >  >  >
 > >  >  > By selecting the proper distribution transformer and ballast, you
 > >should
 > >  > be
 > >  >  > able to get almost infinite flexibility with without the need to
 > >resort to
 > >  >  > a custom HV choke.
 > >  >  >
 > >  >  > Best regards,
 > >  >  >
 > >  >  > -- Bert --
 > >  >  > --
 > >
 >
 >


=====
Jimmy