PWM Electronic Control - Pulse width modulator for 30A 12/24Vdc

[neutrino 36]

Looking for help creating PWM Electronic Control for 30A 12/24Vdc such a project or similar.
thanks

 

[Sceadwian]

Use a standard 555 timer based PWM generator, and a couple of power transistors (or Mostfets) to boost the power handling capability.

 

[ronsimpson]

I do not understand.
30 amps
Input voltage = 12V ?
Output voltage = 24V?

 

[Sceadwian]

ron, as I read it he means a PWM generator that can do 30 amps, input/output voltage are the same, between 12 and 24 volts DC. At 30 amps that's why I suggested looking into Mosfets, (no diode drop just a very low ESR) but there are many depending factors on what neutrino actually wants to do that will effect what the best choice is.

 

[ronsimpson]

I often get burned. At about post #30 we find out it is 220AC to 12 to 24DC at 30A. I want to know long before post 30.

 

[Sceadwian]

Ron. We're on post 2 or 3 at best. Lets keep the original poster in mind here please. EVERY original post must be treated as the first one. You're already derailing understanding by foretelling of a perceived intent of which none has been given.

We're here to do one thing and one thing only, to help to increase understanding, not to judge.

 

[neutrino 36]

For input DC-voltage 12V or 24V.
Max current through the DC- engine 30A!
PWM Electronic Control - Pulse width modulator

 

[misterT]

For input DC-voltage 12V or 24V.
Max current through the DC- engine 30A!
PWM Electronic Control - Pulse width modulator

What kind of engine? What kind of control?

 

[ronsimpson]

For those who still don't understand (mostly me) see this post.
https://www.electro-tech-online.com...r-convert-circuit-from-12v-to-24v-use.104944/
Input 12 or 24V, PWM to control an unknown engine at 30A. (assume 12v engine)

 

[alec_t]

Will the control be provided manually (e.g. using a rotary or slider control, or switches) or by a microcontroller/PC ?
Is the engine/motor one having field coils (i.e. is it an inductive load) ?

 

[neutrino 36]

DC-engine for 12V or 24V

 

[misterT]

DC-engine for 12V or 24V

And what kind of control? Speed control to both directions? Is the 30A current just an estimate (stall current)?

In general, you need an H-bridge that can handle the 24V and 30A. Do you wan't buy one or build it yourself?
Then you need the PWM signal. You can do this with analog circuit:
1) DC reference, triangle wave and a comparator.
2) 555 timer

You can also use a microcontroller to create the PWM signal.

What is the application? Is it a simple human operated machine or a more complex and automatic? Do you need accurate speed control?