Ventilator PWM

[Daniel Valuch]

rozmyslal som povodne nad linearnym regulatorom. Ma to chladit stratovy 
vykon ca. 100W, takze dodatocne 2-3W od ventilatorovho tranzistora nie 
su velmi kriticke. Asi budem teda uvazovat dalej tymto smerom...
b.


On 14/10/2019 10:01, Zuffa Jan wrote:
> low frequency myslia 20 - 30 hz, inak to nefunguje.
> Postavil a pouzil som zopar regulatorov a jedine co mi vadilo
> bolo bzucanie ventilatora.
>
> j.
>
> -----Original Message-----
> From: Hw-list [mailto:hw-list-bounces na list.hw.cz] On Behalf Of balu
> Sent: 14. októbra 2019 9:36
> To: HW-news
> Subject: Ventilator PWM
>
> Zdravim osadenstvo,
>
> mate niekto skusenosti ci sa daju otacky takehoto https://www.tme.eu/sk/details/mf80251v1-a99-a/ventilatory-dc-12v/sunon/mf80251v1-1000u-a99/
>
> ventilatora riadit PWM? Podla tohoto je vsetko v poriadku https://www.analog.com/media/en/analog-dialogue/volume-38/number-1/articles/how-to-control-fan-speed.pdf
>
> A 2-wire fan is controlled by adjusting either the dc voltage or pulse width in low-frequency PWM. However, with only two wires, a tach signal is not readily available. This means that there is no indication as to how fast the fan is running—or indeed, if it is running at all. This form of speed control is open-loop.
>
> Su tam nejaki specialni diablici, na ktorych si treba dat pozor?
>
> Dakujem,
>
> b.