Since you salvaged the unit, check the capacitance of the run cap, a failur=
e there will make the motor run really hot.=20

Best regards, SP

> On Oct 18, 2018, at 2:13 PM, RussellMc <apptechnz@gmail.com> wrote:
>=20
> Can you pass the whole of the extracted air over the motor to cool it?
> Why should this cause a problem?
>=20
> A series resistance (such as a high wattage filament light bulb or a heat=
er
> element) MAY produce the desired results.
>=20
> One method that does wok is to use a vacuum cleaner with a series wound A=
C
> motor (ie none of these new fangled Dyson type thing-gummies) with a seri=
es
> resistor,
>=20
> - Or a vacuum cleaner on lower voltage - plus a series resistor
>=20
> as current will tend to increase with lowered voltage and lower speed. )
>=20
> Series wound motors work on AC or DC.
> I have seen a long ago application where a 230 VAC 50 Hz vacuum cleaner W=
AS
> operated instead on 50VDC with a series resistor to act as a ventillator =
to
> remove Hydrogen Sulphide gas from small telephone exchanges.
> An H2S filter was added in the VC dust bag space as a bonus.
> H2S kills in a different manner to Radon but much more quickly.
> Above a certain concentration the sense of smell is disabled by the gas,
> thus hiding the usual characteristic "rotten eggs" smell,  so impending
> disaster is not noticed.
> In our Rotorua thermal region people very occasionally die from this caus=
e.
>=20
>          Russell
>=20
>=20
>=20
>=20
>>=20
> --=20
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist


--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.