Slow start 220 V 50 Hz

150

03:50:13

Slow start

published 6 years ago

PrathikP

6 years ago

Probably not the best way to do it. You are running the MOSFET in saturation for quite a while.

BillyT

6 years ago

The gate voltage is just a little bit too much.

stanislav_maslovski

6 years ago

BillyT, you should look at the voltage between the gate and the source, not between the gate and the ground. The gate-source voltage is not too much, in fact it is even low for a power MOSFET (usually a few volts).

stanislav_maslovski

6 years ago

PrathikP, yes, that is true. Here, the MOSFET should be able to withstand the power dissipated during the off-to-on transition.

BillyT

6 years ago

Yes I was looking at gate to drain....

kiani

6 years ago

Does it slow start just once?! Switch off and switch on again, .

stanislav_maslovski

6 years ago

kiani, the capacitor has to discharge through the same resistor as it charges but at a much lower rate (due to a smaller current), so, yes, restoring after switching it off is quite slow. The time constant is R*C = 235 sec ~ 4 min!

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