[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor -
All the vacuum clean motors I have all have brushes. I can vari the speed with a variac. This things turn some unreal RPMs. I use all my vac motors to build Variable Speed Vacuum Fan Spark Gaps. As I crank up the speed spark length gets longer and longer I can dial in maximum spark length in about 5 seconds.
http://i67.photobucket.com/albums/h292/mikeweaver/gap2.jpg
-----Original Message-----
>From: Clive Penfold <clivepenfold@xxxxxxxxxxxxxx>
>Sent: Dec 6, 2010 7:24 AM
>To: tesla@xxxxxxxxxx
>Subject: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor
>
>Allow me to reveal my latest discovery or possibly invention if no one has
>thought of it before!
>
>A vacuum cleaner motor can be made to run at synchronous speed with the
>addition of a diode; actually 2 in parallel for mechanical balance
>
>Mains vacuum cleaner motors are usually series wound AC brush motors. The one I
>
>removed from a 1100 watt Miele cleaner ran at 18,000 rpm and drew 5 amps at 240
>volts.
>
>Having dismantled it, I soldered two 3 amp 1000 volt diodes across 2 opposite
>commutator segments (180 deg apart), tucked down behind the commutator. One
>would have done
>
>but to maintain physical balance, I used a pair opposite each other and applied
>
>a liberal amount of epoxy resin to stop them flapping about.
>
>The motor is still series connected as before and runs at 3000 rpm (at 50 Hz)
>quite happily
>
>from 30 volts AC where it draws 0.8 amp to 80 volts AC where it draws 5 amps at
>no load.
>
>
>One thing that I haven't looked at yet is the phase change of the rotor as the
>
>load varies but it is probably no worse than an induction motor with flats
>machined on it. I don't see why it shouldn't respond to John Freau's phase
>controller circuit.
>
>I will be interested to hear of other peoples experiences who try it.
>
>There is a discussion running on this subject on the tcbouklist, where I
>originally posted.
>
>Regards,
>
>Clive
>_______________________________________________
>Tesla mailing list
>Tesla@xxxxxxxxxx
>http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla