Forums

EL Inverter LTSpice model

Started by bitrex November 6, 2016
I'm curious as to what a good way to model an EL inverter in LTSpice 
would be, so I can experiment with some dimming circuits without blowing 
up the bricks on my bench (or taking an unpleasant low-current shock to 
the fingers by accident. Ouch.)

It takes in some voltage between 1-5 volts and spits out around 50-100V 
RMS, proportional to input and load dependent. It's probably some kind 
of self-oscillating push-pull driver plus step-up transformer in a 
resonant circuit internally, like a fluorescent lamp ballast.

At the very least it would be nice to model the "line regulation" and 
some kind of equivalent output impedance.
On 2016-11-07, bitrex <bitrex@de.lete.earthlink.net> wrote:
> I'm curious as to what a good way to model an EL inverter in LTSpice > would be, so I can experiment with some dimming circuits without blowing > up the bricks on my bench (or taking an unpleasant low-current shock to > the fingers by accident. Ouch.) > > It takes in some voltage between 1-5 volts and spits out around 50-100V > RMS, proportional to input and load dependent. It's probably some kind > of self-oscillating push-pull driver plus step-up transformer in a > resonant circuit internally, like a fluorescent lamp ballast. > > At the very least it would be nice to model the "line regulation" and > some kind of equivalent output impedance.
model a Royer inverter, ltspice should be able to handle that easily. -- This email has not been checked by half-arsed antivirus software
Hello there!

Am planning something very similar myself. Have gone the experimental way first and successfully found that those common sealed 5V (USB) Inverters sold on Ebay or Amazon for EL Wire are successfully dimmable with constant power (PWM directly did result in flickering despite high PWM freuncy, but with a low-pass filter after the PWM-input, it did work).

However I would like set this up in LTspice too.
Do you happen to have modeled something successfully in the meantime?

Huge thanks in advance :)