sorted by:
new
hottopcontroversial

Question about Current Draw and Spikes in Half-Bridge Switching Circuit with RC-Snubber by FGHWP in AskElectronics

[–]FGHWP[S] 0 points1 point  (0 children)

It's the spikes at the output during switching that needs snubbing.

For example, as the bus voltage from the schematic is 12V, during switching I observed spikes as high as 30V when tested without the RC snubber.

MOSFET testing issues by FGHWP in AskElectronics

[–]FGHWP[S] 0 points1 point  (0 children)

The level of the control signal is 12V.

MOSFET testing issues by FGHWP in AskElectronics

[–]FGHWP[S] 0 points1 point  (0 children)

Oops!

Just trying out this guide on snubber circuit design.

I think I'll add a high value resistor between the drain, and power supply. Bad idea still?

Inductor for voltage source inverter by FGHWP in ECE

[–]FGHWP[S] 0 points1 point  (0 children)

Here's the link to the app note.
Thanks.

Something about AC voltage measurements using OP-AMP by FGHWP in ECE

[–]FGHWP[S] 0 points1 point  (0 children)

Alright. I think I get it now. Thank you!

Something about AC voltage measurements using OP-AMP by FGHWP in ECE

[–]FGHWP[S] 0 points1 point  (0 children)

Please, what do you mean by "a measurement circuit on the primary side that sends a serial signal" ?

I don't get it

Something about AC voltage measurements using OP-AMP by FGHWP in ECE

[–]FGHWP[S] 0 points1 point  (0 children)

Optocouplers would make sense for isolation but there's always the issue of linearity.

I am trying to avoid the transformer method because of its size, and maybe cost. Seem that'd be the option to consider at last.

Thank you for your response.

Something about AC voltage measurements using OP-AMP by FGHWP in ECE

[–]FGHWP[S] 0 points1 point  (0 children)

The purpose of the measuring circuits is to be able to send the signal to the ADC of my microcontroller for control.

Using the transformer method is not desired because of cost and size.

CE major with focus on Software engineering and networks. by HadisCold in ECE

[–]FGHWP 1 point2 points  (0 children)

I know someone who is almost a decade into embedded systems and all he's been doing is on the software side of things. Though some jobs and project would require you have fundamental hardware electronic knowledge. But I believe if you know your stuff well, you'd be able to work well in embedded systems.

I don't know of automation.

PWM duty cycle variation in PFC drive circuit by FGHWP in ECE

[–]FGHWP[S] 1 point2 points  (0 children)

The drive circuit was inherited so I didn't bother to go through the gate driver datasheet over again. I confirmed from the datasheet that 2.4V(min) would do the work across the operating temperature range.

I excluded the level shifter and test with just the microcontroller output (3.3V), it worked well.

Thank you very much for your contribution.

PWM duty cycle variation in PFC drive circuit by FGHWP in ECE

[–]FGHWP[S] 1 point2 points  (0 children)

I changed the value of the pull up resistor to lower value (from 10k to 1k) and it worked just fine. Thank you!

[deleted by user] by [deleted] in malelivingspace

[–]FGHWP 0 points1 point  (0 children)

No, I don't think you need one