Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[d3x0r]

https://www.youtube.com/watch?v=ma-TTC4Ft1Y&feature=youtu.be

Cordialement
Michel

Not to drag on the off-topic.  But if his circuit is really as the schematic indicates, the 'high current meter' isn't across the load, but rather is just a very low voltage load across the secondary coil itself; and the current through that meter doesn't exist except the meter and the coil, and is not representive of the current through the bulb; which is fine to have amps different in seperate parts... and the meter itself is certainly neglegable power drop.   If you disagree, start a new thread, and pm me a link.


Now back to your regularly scheduled program.

[T-1000]

This implies a separate driving for each coil. As long as the coils are connected in series between each other, then gap can not be created between poles. I assume that Pierre's new stator coils (90T per coil) are for to be driven separately. And that is a good explanation of why he moved from 30T to 90T.

Regards

Pierre did not show his circuit and how he connects positive and negative switching so I created my version of module - https://i.imgur.com/muSF3CN.png
This module allow full control with MOSFETs of positive and negative switching for 4 coils in series. And for Pierre's case it would require 9 of these modules in series with control circuit. Which would allow powering 4 coils in series for single polarity.
In addition it have logic protection against short circuit between HIGH and LOW state on same position.
Hopefully this circuit will be useful for experiments.

Cheers!

[Jeg]

Hi T1000
I was thinking the same. I mean the usage of a full bridge per coil but separately driving with no connection between the coils. What is the type of the driver in your schematic?

Regards

[T-1000]

Hi T1000
I was thinking the same. I mean the usage of a full bridge per coil but separately driving with no connection between the coils. What is the type of the driver in your schematic?

Regards

The driver is L298N - https://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf
It alows separate control of 4 H-Bridges.
When powering coils with more than 12V the 12V voltage stabilizer will be required for the VS pin.
Initially I wanted to drive with H-Bridge drivers but quickly realized it is painful and costly way when we need separate control of HIGH and LOW state on each coil pin.

P.S> In the circuit I shared the R sense pins 1&15 are connected to negative when no feedback is required. I left it open originally.

[Jeg]

Thank you Arunas