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PWM on 12volt winch?

Maglatron

Jul 12, 2023
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yeah I can't find a 2500watt variable resistor, rheostat, or potentiometer! not really surprised to be honest
 

Minder

Apr 24, 2015
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good man! I missed that, so what does that suggest, motor type wise? wait that was stupid it's a permanent magnet motor can you you PWM on that?
PM motor can be DC brushed, BLDC or 3ph AC synchronous, the last two motors are identical in construction, just the means of commutation is different.
The BLDC has only two windings energized at any one time, the AC synchronous has three phase applied.
Both motors can be used in both fashion with the right commutation added, I have done it on a few occasions.
BTW the rear view of the motor shows two screws holding the rear cover on, if this can be removed, even partly, you should be able to see if it has brushes or not.
 

Maglatron

Jul 12, 2023
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hmm ok I shall ask my freind if he can do it, being as it is with him, he's not too technical though so might have to come back to this topic in a while when I can get my hands on it but why would a permanet magnet motor need a brushed comutator because they usually are used to energize the rotor winding but being permanent type there are no rotor windings because the rotor has permanent magnets on it? I agree that is could be either 3-phase, BLDC or synchronous but I don't get why a permanent magnet motor would ever be brushed! Unless the permanent magnets are on the stator then I think maybe that setup you would need a comutator, actually I remembered little dc motors at school where the magnets were in the stator, dusting off some old brain cells!
 
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Minder

Apr 24, 2015
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Brushed DC PM motors have been around for some time now, the old wound field is long gone,. Except for series field motors, e.g. the Universal motor found in vacuum's and the older style starter motor.
IOW, in brushed PM, the field is now PM, the armature is still wound.
 

kellys_eye

Jun 25, 2010
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A pot won't work.

PWM does lower the voltage (average power) so there's that.

And your winch doesn't do 10.5/s - that's like snapping an elastic band. Maybe 10.5m/MINUTE. (approx 2 feet/sec).
 

Delta Prime

Jul 29, 2020
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Don't quote me on this...
You need not private message me in these matters. Just trying to keep the cards straight. Aces and eight's the dead man's hand!

 

Maglatron

Jul 12, 2023
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A pot won't work.

PWM does lower the voltage (average power) so there's that.

And your winch doesn't do 10.5/s - that's like snapping an elastic band. Maybe 10.5m/MINUTE. (approx 2 feet/sec).
ha quite right 10 m/min
 

Maglatron

Jul 12, 2023
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Don't quote me on this...
You need not private message me in these matters. Just trying to keep the cards straight. Aces and eight's the dead man's hand!

I can't access the second link on the internet connection that I have!
 

Delta Prime

Jul 29, 2020
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Specifications:as stated before no need for private messages when it comes towards information. Unless it's dirty information on other members (just kidding)...

Screenshot_20240130_021209.jpgScreenshot_20240130_021233.jpgScreenshot_20240130_021314.jpg
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Maglatron

Jul 12, 2023
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ok won't PM you Mr Delta Prime I'll keep it in the thread, cheers
what I meant was specs on the motor type!?
 
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Delta Prime

Jul 29, 2020
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Sensu lato? In a broad sense, an explanation on the operational physics of a winch is not the scope or breath of this thread. Good day to you sir.
 

Alec_t

Jul 7, 2015
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need abit of help with it though
It's above my pay-scale, with all those Amps. It will need serious engineering and possibly critical layout, taking onto account heat-sinking, back-emf and EMI.
 

Maglatron

Jul 12, 2023
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oh ok lol I can use a pcb made by some company online and get the heat sinks I'm sure I'm competent enough to rise to the challenge and build it, its kind of a neccesity for me because I need it for one of my projects cost is a small matter for what I'll be gaining in the end :) I hope to have incentivised you a bit!
 

Maglatron

Jul 12, 2023
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I believe in you!!
It's above my pay-scale, with all those Amps. It will need serious engineering and possibly critical layout, taking onto account heat-sinking, back-emf and EMI.
 

Maglatron

Jul 12, 2023
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Is there anybody up for the job?? I'd offer up to £500 for to include the parts and labour
 

Maglatron

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or write up a parts list, include enough for a new winch and the rest of the parts then put your labour cost on top, I feel someone should be competent and up for the job being very serious now! It's a nice little project for someone i recon! want a ferrari buy a ferrari the cost will be negotiable
 
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