Answer the question
In order to leave comments, you need to log in
How to eliminate the "clicks" of the field worker?
I switch the load of 7.5 amperes at 12 volts, with an n-channel mosfet. Gray nichrome, wound on the pipe with a spiral. The opening and closing of the mosfet occurs once a second, and at these moments some kind of click is heard. Subjectively, I could not determine with my ear where and what exactly clicks, where you do not listen everywhere this sound of the same intensity. What can be done to eliminate it? And do you need to do something?
Otherwise, there are no problems. Holds a load and doesn't get hot. The resistor from the gate to the source is 18k, I did not put a resistor to the gate itself, since the gate is connected through an optocoupler (on it somewhere 100-200 ohms).
Answer the question
In order to leave comments, you need to log in
UPD: The answer has been completely changed.
... 5 pieces of 1mm nichrome paralleled, 5 meters long.From these data it follows that your pipe has a solid diameter, about 200 mm. It looks like this heater of yours is an 8:1 RF transformer, has fairly well flux-coupled windings, and therefore, despite the absence of a magnetic circuit, has a good efficiency. Its main feature is that the secondary winding is short-circuited , i.e. it is a current transformer.
... it took me about 8 turns
Didn't find what you were looking for?
Ask your questionAsk a Question
731 491 924 answers to any question