can i remove turns from shaded pole motor
in [Repair]
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From: Steve Sousa on 26 Jun 2010 22:09 "Sylvia Else" <sylvia(a)not.here.invalid> wrote in message news:88ik8jFsbvU1(a)mid.individual.net... > On 25/06/2010 10:37 AM, PeterD wrote: >> On Thu, 24 Jun 2010 23:04:00 +1000, Sylvia Else >> <sylvia(a)not.here.invalid> wrote: >> >>> On 24/06/2010 9:46 PM, PeterD wrote: >>>> On Thu, 24 Jun 2010 15:29:35 +1000, Sylvia Else >>>> <sylvia(a)not.here.invalid> wrote: >>>> >>>>> On 24/06/2010 3:04 PM, Steve Sousa wrote: >>>>>> Hello: >>>>>> >>>>>> I live in a 230V area but need to use a 120V fan to repair an >>>>>> amplifier. >>>>>> I can only get 230V fan motors here, so i was wondering if i can >>>>>> simply >>>>>> remove turns from a 230v shaded pole motor to make it into a 120v >>>>>> one? >>>>>> >>>>>> Thank you. >>>>>> >>>>>> >>>>> >>>>> No. It's highly unlikely that the wire used in the motor is more than >>>>> 100% overspecified, so if you remove turns from it to make it run at >>>>> the >>>>> same speed on 120v, it will overheat, because the current will >>>>> approximately double. >>>>> >>>>> Sylvia. >>>> >>>> There is one high labor alternative that might work... >>>> >>>> Take the current wire on the motor, and find the center, break it at >>>> that point, so you have two 120 volt windings. Put in parallel for 120 >>>> volts, and series for 240 volts. >>>> >>>> But, IMHO, hardly worth the effort, but technically feasible. >>> >>> I'm not sure it's advisable either. There's every chance the enamel will >>> be damaged in the process. If he's lucky, any short will appear as soon >>> as he turns it on. If he's unlucky, it will occur when he's not looking. >>> >>> Sylvia. >> >> Advisable, probably not, but a theoritical solution, however!<bg> > > That I agree with. > > Sylvia. Hello: Thanks you for the reply. I wasn't sure about the current doubling, but i guess is just like a transformer. I'll just add a relay and be done with it. Best regards
From: Steve Sousa on 26 Jun 2010 22:13 "Smitty Two" <prestwhich(a)earthlink.net> wrote in message news:prestwhich-3EE8FE.04594124062010(a)newsfarm.iad.highwinds-media.com... > In article <4c22e757$0$77541$892e0abb(a)auth.newsreader.octanews.com>, > "Steve Sousa" <etsteve(a)yahoo.com> wrote: > >> Hello: >> >> I live in a 230V area but need to use a 120V fan to repair an amplifier. >> I can only get 230V fan motors here, so i was wondering if i can simply >> remove turns from a 230v shaded pole motor to make it into a 120v one? >> >> Thank you. >> >> > > Hmm, I always thought you could get anything on the planet to any other > place on the planet. How could you not be able to get a 120V fan? Hello: The problem is cost. The OEM doesn't have it, people who have it are selling for 130$ +, that's too much for the original. Customs takes a lot of time "inspecting" and figuring how much to charge (about 30% on top of that). Best Regards
From: Steve Sousa on 26 Jun 2010 22:17 "Trevor Wilson" <trevor(a)rageaudio.com.au> wrote in message news:88n79fF6hrU1(a)mid.individual.net... > > "Steve Sousa" <etsteve(a)yahoo.com> wrote in message > news:4c22e757$0$77541$892e0abb(a)auth.newsreader.octanews.com... >> Hello: >> >> I live in a 230V area but need to use a 120V fan to repair an amplifier. >> I can only get 230V fan motors here, so i was wondering if i can simply >> remove turns from a 230v shaded pole motor to make it into a 120v one? >> > > **That would be the insane solution. And one which won't work. You don't > say where you are, but obtaining 120VAC fans is simply not that difficult, > regardless of where you are. Alternatively, you could source a suitable DC > fan (say: 48 Volts) and use that, connected to a DC supply line within the > amp. > Hello: I could eventually get a 120V fan for a much higher cost, but the original was probably disposed of because of that, i'm just going to add a relay, and put a 230v fan with the minimum amount of modification, that way is future proof. Thank you all for your help Best regards Steve Sousa
From: Phil Allison on 26 Jun 2010 22:28
"Steve Sousa" > > The problem is cost. The OEM doesn't have it, people who have it are > selling > for 130$ +, that's too much for the original. Customs takes a lot of time > "inspecting" and figuring how much to charge (about 30% on top of that). ** What electronics backwater are you living in ?? Here in Sydney, one can get a 115 VAC, 120 mm fan from spare parts dealer ( WES Components) for $18.75. ..... Phil |