Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor

[Michael Baumann <baumann@xxxxxxxxxxxxx>]

Just a thought - depending on the cost, those chinese motors could run dry 
long enough to make them cost effective. What's the duty cycle of a spark gap?

Also - while they say water, mineral oil could possibly be used - at least the synthetics that don't attack the enamel.


On Dec 9, 2010, at 12:21 PM, Gary Lau wrote:

> If building a Tesla coil just to make sparks isn't stupid, then neither is
> pushing a motor (to make sparks AND smoke) to a spectacular end.  That it
> continued to run with incandescent brushes was amazing!
> 
> Yes, I suspect that washing machine motors on this side of the pond all use
> induction motors, but haven't been able to observe enough appliances to say
> that with authority.
> 
> That the synchronous washing machine motors that require water are
> unsuitable seems a terrible waste, and would have guessed that it would be
> easier to adapt that to dry-use than a universal motor.
> 
> Regards, Gary
> 
> On Thu, Dec 9, 2010 at 2:57 PM, Teslalabor <teslalabor@xxxxxxxxxxx> wrote:
> 
>> Here is a link of the motors I will use for modification (please excuse
>> this stupid video where I kill such a motor with overvoltage):
>> 
>> http://www.youtube.com/watch?v=D8zXyFKfMSg
>> 
>> Here in Germany nearly all washing machines use this type of motor, maybe
>> in USA there are brushless induction motors arround?
>> 
>> Stefan
>> 
>> ----- Original Message ----- From: "Gary Lau" <glau1024@xxxxxxxxx>
>> 
>> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>> Sent: Thursday, December 09, 2010 8:44 PM
>> 
>> Subject: Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous
>> Motor
>> 
>> 
>>  I was going to post this:  I thought that washing mashine motors were
>>> induction motors - not brush/universal motors?  But I've not looked
>>> closely/recently.
>>> 
>>> But before hitting Send, I Googled "Washing machine motor".  There appears
>>> to be both 1725 induction-types, and then 10,000+ RPM types.  Perhaps
>>> regionally?
>>> 
>>> Of significant interest was this link to a Chinese motor vendor,
>>> advertizing
>>> 3000RPM synchronous washing machine motors:
>>> 
>>> http://www.chinasuppliers.globalsources.com/china-suppliers/Washing-Machine-Motor.htm
>>> 
>>> Regards, Gary Lau
>>> MA, USA
>>> 
>>> On Thu, Dec 9, 2010 at 2:18 PM, Teslalabor <teslalabor@xxxxxxxxxxx>
>>> wrote:
>>> 
>>> Next week I get some 1000V 6A diodes. Then I will modify a 800W universal
>>>> motor from a washing machine and do the scope test (with magnets and pick
>>>> up
>>>> coil) to see, how good it sync's to the line frequency.
>>>> Will put a video of this to youtube. The torque of the "Pensold Motors"
>>>> should be much bigger than any modified asynch. motor with flats on its
>>>> armature.
>>>> 
>>>> Stefan
>>>> 
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>> 
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Michael Baumann
baumann@xxxxxxxxxxxxx



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