David_
Advanced Member level 2
Hello.
I recently found out about magnetic amplifiers and the usage of such a circuit to regulate previously unregulated isolated rails in SMPS converters, but so far I have only found texts that speak very vaguely about what Magnetic amplifiers(MagAmps) can do and can't do.
Some texts I read have given the impression that mag amps is mostly for current regulation or minor voltage regulation, but others give the impression that I could exclude any secondary side feedback and replace that with a magnetic amplifier to regulate the voltage just as much as a secondary feedback to the PWM controller could?
Of course this depend on how the specific converter where designed but I have a forward converter that if successful will regulate the isolated output between 10V and 60V with the maximum duty cycle somewhere around 45%, but I have gotten very interested in if magnetic amplifiers could be used to give me more than one fully regulated isolated outputs?
As I understands it a magnetic amplifier would delay the switching action to change the on/off times, the difficult part appears to be designing the saturable core reactor(is that synonymous with magnetic amplifier?) to balance the volt seconds. It needs to reset it self over different amount of times depending on how long the delay action is delaying and how much energy that takes... Or something like that, I will continue to read but there are some aspects which I would like to discuss if someone have any knowledge of this.
Regards
I recently found out about magnetic amplifiers and the usage of such a circuit to regulate previously unregulated isolated rails in SMPS converters, but so far I have only found texts that speak very vaguely about what Magnetic amplifiers(MagAmps) can do and can't do.
Some texts I read have given the impression that mag amps is mostly for current regulation or minor voltage regulation, but others give the impression that I could exclude any secondary side feedback and replace that with a magnetic amplifier to regulate the voltage just as much as a secondary feedback to the PWM controller could?
Of course this depend on how the specific converter where designed but I have a forward converter that if successful will regulate the isolated output between 10V and 60V with the maximum duty cycle somewhere around 45%, but I have gotten very interested in if magnetic amplifiers could be used to give me more than one fully regulated isolated outputs?
As I understands it a magnetic amplifier would delay the switching action to change the on/off times, the difficult part appears to be designing the saturable core reactor(is that synonymous with magnetic amplifier?) to balance the volt seconds. It needs to reset it self over different amount of times depending on how long the delay action is delaying and how much energy that takes... Or something like that, I will continue to read but there are some aspects which I would like to discuss if someone have any knowledge of this.
Regards