Re: Re: [TCML] Re: Simple SSTC topology

[Greg Young Morris <GYoungMorris@xxxxxxxxx>]

Excellent, that clears things up! Thank you!

Greg

--
Greg Young Morris
MASc EE Student
McGill University


On Mon, Sep 26, 2011 at 5:29 PM, Antonio Carlos M. de Queiroz <
acmdq@xxxxxxxxxx> wrote:

> On 16:59, Greg Young Morris wrote:
>
>> Sorry, I might not have been clear in what I was referring to.
>>
>> The primary and secondary coil configuration and geometry aside, I was
>> more
>> interested in the single MOSFET driver circuit. If this configuration
>> would
>> work (and intuitively, I also suspect it would), why would anyone go to
>> the
>> bother of creating an H-bridge driver circuit?
>>
>>  The drawing shows a basic flyback circuit (the coils are just in
> schematic representation. They are not one besides the other). This is not a
> Tesla coil. The idea is to turn on the mosfet until the primary current
> reaches a certain level and then to switch it off. A large voltage pulse
> then appears over the primary coil, and if the coupling between the coils is
> good, across the secondary coil too, with the voltage multiplied by the
> turns ratio and the energy absorbed by the secondary capacitance. In
> practice, the coupling is not perfect, and something must clip the pulse at
> the primary side. In this case the avalanche diode of the mosfet, that will
> soon get very hot. Usually, a capacitor is added across the primary coil to
> limit the amplitude of the pulse, and then  a diode across the mosfet (maybe
> the intrinsic avalanche diode) returns unused energy to the power supply. It
> is possible to operate this device as something similar to a Tesla coil with
> adjustments in the primary and secondary capacitances, inductances, and
> coupling, but the resulting element values required result similar to the
> ones of a TV flyback circuit, or a classical induction coil.
>
> Antonio Carlos M. de Queiroz
>
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