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Lee,
I am fully taking di/dt into account. The shape of the polarizing pulse
makes no difference to the fact that NOTHING CHANGES going from a given coil
split into two and paralleled, to the exact same coil connected in series,
with the voltage doubled and the current halved. Both aspects of the
impedance (resistance and inductance) change in the same proportion (4x)
which is exactly the change of voltage/current (4x). Therefore waveshapes,
min/max field intensities, energy absorbed by the magnetic field, energy
absorbed by the copper windings, are all exactly the same. Actually this
principle has applied to alot of power conversion equipment I have designed.
A charge pump is not necessarily the most efficient way to charge the
capacitor, incidentally. In fact, conventional inductive chargers usually
have better efficiency if they are well designed.
Regards,
Peter Boetzkes
----Original Message Follows----
From: "Lee Fraser"
Reply-To: "The Proton Mag Forum"
To: "The Proton Mag Forum"
Subject: Re: Bifilar windings
Date: Fri, 19 May 2000 17:32:46 -0300
The Proton Mag ForumPeter -
Good stuff but I don't think its quite right. Remember di/dt and the fact
that the ideal shape for the polarizing pulse is rectangular. This is why I
wouldn't bother with a charge pump although it is an attrative idea.
Lee
__________________________________________________ ____________________
I am fully taking di/dt into account. The shape of the polarizing pulse
makes no difference to the fact that NOTHING CHANGES going from a given coil
split into two and paralleled, to the exact same coil connected in series,
with the voltage doubled and the current halved. Both aspects of the
impedance (resistance and inductance) change in the same proportion (4x)
which is exactly the change of voltage/current (4x). Therefore waveshapes,
min/max field intensities, energy absorbed by the magnetic field, energy
absorbed by the copper windings, are all exactly the same. Actually this
principle has applied to alot of power conversion equipment I have designed.
A charge pump is not necessarily the most efficient way to charge the
capacitor, incidentally. In fact, conventional inductive chargers usually
have better efficiency if they are well designed.
Regards,
Peter Boetzkes
----Original Message Follows----
From: "Lee Fraser"
Reply-To: "The Proton Mag Forum"
To: "The Proton Mag Forum"
Subject: Re: Bifilar windings
Date: Fri, 19 May 2000 17:32:46 -0300
The Proton Mag ForumPeter -
Good stuff but I don't think its quite right. Remember di/dt and the fact
that the ideal shape for the polarizing pulse is rectangular. This is why I
wouldn't bother with a charge pump although it is an attrative idea.
Lee
__________________________________________________ ____________________