170 watts in - 1600 watts out - looped - Very impressive build and video

[seaad]

It might be a silly question but why are L6 and L7 have shorting out resisters when they are load coils and yet are fed fron no where ?

They are fed from L1, L2. See the red output pulse above the two first (time) pulses. Just a simple principle diagram.
R / Arne

[konehead]

Hi Luc
Thanks for being go-between and translator for Pierre....
Can you ask is does the pulsing come in every 10 degrees?
Or is it perhaps every 30 degrees or 20 degrees?
How many wires are within a single slot would be great to know....
thanks again
Kone




 

[listener191]

Just realised that those L298N boards have a 35V DC input restriction even though the L298N is rated up to 46V DC.
This seems to be due to the 5V regulator they have on the board and associated cap rating.

The 26V AC input will be FWBR to about 36V DC, so too close to the mark.

This is a real pain as I found a source that could supply 18 pcs for 25 GBP or 35 USD for 20 pcs.

L192

[gyulasun]

Hi L192,

You could lift up the input pin of the 5V regulator IC from the board and then reconnect it via a series 12V (or 15V) Zener diode.
This way the Zener would take up the difference of the 46V and the 35V, so the input voltage to the 5V regulator may stay within safe limit.
Regarding the voltage ratings of the associated capacitors, they could be replaced with higher voltage rated caps.

The power dissipation for the Zener should be considered, maybe 3 pieces of 4.7V or 5.2V Zeners in series could ease the individual dissipations. OR a series pass transistor that would feed the input pin of the 5V regulator could be used if needed (this may sound as an overkill though).

Gyula

[seaad]

A simple test with consecutive pulses.
You can see the similarities in my Reply #137, left pic.. One magnet passing by.