[DeTomaso] Blower motor replacement

[doug351c]

Some fan motors use dual motor windings for multiple speeds but not the
Pantera's fan motor, it's a single speed motor with a single winding; it's
the resistor and the two on-position switch that makes it a 2 speed fan.  So
the PWM unit replaces the resistor and I'd wire it so either switch position
turns on the PWM unit.

Doug Braun
blue 73L #5505

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Ken Green
Sent: Friday, January 28, 2011 12:52 PM
To: Kirby Schrader
Cc: DeTomaso at realbig.com
Subject: Re: [DeTomaso] Blower motor replacement

I understand that you could just wire the PWM to a high speed terminal of a
motor multi-speed motor, but I wondered if there is a better single speed
motor out there.
 
Seems like a PWM operating at a higher frequency might get rid of the buzz. 
I've looked at some specs for different PWM power supplies in the past and
the frequency can vary, at the same duty cycle, based on the application. 
 
Ken
 
--- On Fri, 1/28/11, Kirby Schrader <kirby.schrader at gmail.com> wrote:

From: Kirby Schrader <kirby.schrader at gmail.com>
Subject: Re: [DeTomaso] Blower motor replacement
To: "Ken Green" <kenn_green at yahoo.com>
Cc: DeTomaso at realbig.com
Date: Friday, January 28, 2011, 12:22 PM


In my GT-40, I used the fans that were already there. It has two.
I plan to hook it up to my existing motor in the Pantera.

You can wire the PWM up to any DC brushed motor. All the PWM does is pulse
the fan motor with smaller voltage pulses to slow it down. Note that you may
be able to hear a very faint buzzing noise at very low speeds.


On Fri, Jan 28, 2011 at 14:14, Ken Green <kenn_green at yahoo.com> wrote:

> I assume you just use a single speed fan with the PWM power supply.  Is
> there a preferred after market single speed fan motor?
>
> Ken
>
> --- On *Fri, 1/28/11, Kirby Schrader <kirby.schrader at gmail.com>* wrote:
>
> From: Kirby Schrader <kirby.schrader at gmail.com>
> Subject: Re: [DeTomaso] Blower motor replacement
> To: "Brian Hill" <mazdastuff at yahoo.com>
> Cc: DeTomaso at realbig.com
> Date: Friday, January 28, 2011, 11:54 AM
>
> Brian,
>
> Had time over lunch and did some searching and' GT-40 Jack' recommended
> this
> one, too. (he'll love it when I tell him I used that name...)
>
>
http://cgi.ebay.com/12V-15A-DC-Motor-Speed-Control-PWM-HHO-RC-Controller-/26
0723571546?pt=LH_DefaultDomain_0&hash=item3cb455fb5a
>
> Again, you have to move the potentiometer to the dash and hook it up with
> wires.
>
> Kirby
>