Variable Wattage question, How does it work? (technical)

[Zanderist]

My question centers around the features of itaste MVP 2.0 chipset as an example.

The following is aimed at more of techincal theory

What I'm hoping to find out is an understanding of how to vary watts


Now its variable wattage I have no idea how the concept works. One circuit application I can say would work here is PWM.

Pulse-width modulation - Wikipedia, the free encyclopedia

One other is a transcendence amplifer where voltage is held at the Max and its amps that is varied

Operational transconductance amplifier - Wikipedia, the free encyclopedia

 

[Rossum]

The regulator board briefly applies a known, (preferably low) voltage to the coil and measures the current that flows as a result. This allows it to calculate the resistance of the coil and then apply whatever voltage is required to produce the desired wattage.

The required voltage can be produced using low frequency PWM (cheap Chinese mods) or an adjustable boost, buck, or boost-buck regulator (better mods).

Ideally, the current flowing is monitored continuously while firing and the the voltage is adjusted correspondingly the whole time. I know real DNAs do this, but I'm not sure whether an MVP or most other VW mods do.

 

[Zanderist]

Makes sense, thank you.

 

[Siochanai]

As someone who is big into hobby electronics this is exactly what happens. The micro controller is actually manipulating ohms law dynamically in ord to keep selected wattage. This is also the same way they can prevent certain resistances from acessing unsafe wattages because the controller chip can only take so much without frying. So tje best suggestion I can give unless you are very keen on uC development and circuits would be to buy say a dna 30 right from evolv and start with that. At least until you have some solid understanding.of uCs to build your own regulator setup.