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luVWagn
Samba Member
Joined: February 21, 2008
Posts: 1340
Location: Snoqualmie (WA)
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 Posted: Sat Nov 22, 2014 12:42 am Post subject: Re: pwm dc motor controller |
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| pushkick wrote: |
| so its been awhile since this post was started. what pwm controller have you ended up with and how has i worked for you? do you still have the whining noise? where did you mount the contoller? that old resistor creates a lot of heat and the factory mounted it in the plastic blower box. |
Mines in my thread, was cheap, working fine. No whining. But not enough variability in the speed at lower 1/2 of range.
_________________
'91 Syncro 16 Reimo Hightop Conversion, eTDI |
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ragnarhairybreeks
Samba Member
Joined: October 26, 2009
Posts: 1890
Location: Sidney B.C. Canada
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| Posted: Sun Dec 18, 2016 7:01 pm Post subject: Re: PWM DC Speed Control for heater fan to replace resistor |
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Quick vid of controller and spare blower. The controller is this one, https://banggood.app.link/IPnta0IxFx
It's probably undersized. Says 15 A with 10 A continuous. I measured. 10.2 A draw on full throttle. Power source was a not fully charged battery, don't know if the lower than 13 v supplied voltage would affect the current draw with a PWM controller. The heat sinks got mildly warm on 3/4 full tilt, I think a bigger unit might be better.
But it was still fun to see it make the blower go 
No screeching or high pitched noise that I could detect . The unit says its 16 kHz.
Link
Alistair
_________________
'86 7 passenger syncro, converted to westy pop top, project still in progress
'82 westy, diesel converted to gas in '94, now gone...
https://shufti.blog/
Old address still works...
http://shufti.wordpress.com |
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shagginwagon83
Samba Member
Joined: February 07, 2016
Posts: 3803
Location: VA/TN
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reinheitsgebot
Samba Member
Joined: October 10, 2015
Posts: 27
Location: mansfield, mass
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| Posted: Fri Jan 17, 2020 4:41 pm Post subject: Re: PWM DC Speed Control for heater fan to replace resistor |
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I just started refurbing my heater and while researching I came across this:
https://www.youtube.com/watch?v=3GzJ8N1Rqp8.
Since I have everything apart and I'm replacing the blower I figured I should also not ignore the resistor. Not really keen on paying for a new resistor so for around $ 20 I plan on trying a PWM. Just ordered it and the blower yesterday so we'll see how it works.
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'84 Westy
2WD 4 spd manual
Subaru 2.5 from NorthWesty
16" mercedes wheels with T3 hardware |
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