[Healeys] Heater motor

[Herbert Miller]

Rick

The Austin Healey blower motor is not a permanent magnet motor. The magnetic
field is supplied by field coils.

Herb Miller

 

From: Richard Ewald [mailto:richard.ewald at gmail.com] 
Sent: Thursday, July 15, 2010 7:52 AM
To: Alan Seigrist
Cc: Herbert Miller; healeys at autox.team.net
Subject: Re: [Healeys] Heater motor

 

::: Scratches head:::
Well back in the day when I raced slot cars (which used a DC permanent
magnet motor) we would wire in a 1.5V battery to the off position of the
controller.  We would wire it to the reverse polarity of the track.  So when
you took your thumb all the way off the motor was given 1.5V backwards.
This would cause the car to slow down RIGHT NOW and if you had a fresh
battery creep backwards.
So in my experience reversing the polarity on a DC motor does reverse the
direction.  Why do you say it does not?
Rick

On Wed, Jul 14, 2010 at 11:47 PM, Alan Seigrist <healey.nut at gmail.com>
wrote:

If you switch polarity, it does not affect the heater motor spin direction.


On 7/15/10, Richard Ewald <richard.ewald at gmail.com> wrote:
> Are you sure about changing the polarity not changing the direction of
> rotation?  As I recall it does.
> It won't help if the case is grounded, but if the case is not grounded,
you
> should be good to go.
> Rick
>
> On Wed, Jul 14, 2010 at 9:20 PM, Alan Seigrist <healey.nut at gmail.com>
wrote:
>
>> Herbert -
>>
>> I believe you will have to have the armature rewound the opposite
>> direction.  That will cost about 100 bucks ++ at your local auto
>> electrical repair shop.  You can't just reverse the leads....
>>
>> Alan
>>
>> On 7/14/10, Herbert Miller <hgmiller3 at qwest.net> wrote:
>> > I need some help.
>>   I know that changing
>> > the polarity of the leads makes no difference.
>> >
>> > Any help is appreciated.
>> >
>> >
>> >
>> > Herb Miller
>>
>

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