Recently encountered difficulties in controlling the heating wire, the existing scheme is hardware to generate sine wave, then the software according to drop along the open mouth heat wire pin (because the chip does not support double edge trigger, the falling edge of the trigger pin the mouth, and then software to simulate the rising along the situation, actually also implements a cycle of control, not only open half cycle), in the process of control fever wire, power is unstable, serious when can have a few hundred watts float, the other by NTC protection mechanism, or fuse bad happens, however, software debugging, also found a situation, a sign of falling trigger is triggered, it is morally wrong (3.5 V when I debug, not in 220, will not have a sine wave, not supposed to be a marker position 1), speculated that in fact electricity when also can have the extra triggered, lead to instability, control software is going to add time interval before and after the judgment of time interval is wrong, give up the trigger,
Post to ask a senior bosses communication, thank you.

CodePudding user response:

So high power isolation is right?

CodePudding user response:

reference 1st floor dceacho response:

so high power has good isolation?

well, what is this isolation?

CodePudding user response:

Don't know what you are saying,,,

CodePudding user response:

reference seedundersnow reply: 3/f

don't know what are you talking about,,,

is my description does not reach the designated position, or you didn't do heat wire? My language ability is not goozyet

CodePudding user response:

hand painted a picture, make a look,

CodePudding user response:

Now the trouble is that power is not stable, I'll ask what software do you have any efficient way,

CodePudding user response:

Is a little unclear description

Is the control signal is a sine wave, single chip microcomputer falling edge detected open a heating wire heating, high voltage power control level to
Then problem is the single chip microcomputer accidentally falling edge detected

refer to the second floor Ayyee response:

Quote: refer to 1st floor dceacho response:

so high power has good isolation?

well, what is this isolation?

Separated physical weak current and high voltage part, commonly used up decoupling indirect control, you can search on the net related content

CodePudding user response:

refer to 7th floor dceacho response:

is a little unclear description

Is the control signal is a sine wave, single chip microcomputer falling edge detected open a heating wire heating, high voltage power control level to
Then problem is the single chip microcomputer accidentally falling edge detected

Quote: refer to the second floor Ayyee response:

Quote: refer to 1st floor dceacho response:

so high power has good isolation?

well, what is this isolation?

Separated physical weak current and high voltage part, commonly used up decoupling indirect control, you can search on the net related content

yes, you are absolutely right, the end of the me to search, I hardware ability is very weak, thank you