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Re: how deep do the coilers prefer doing it? : )

Original poster: "claudio masetto" <claudmas@xxxxxxxxxxxxxxx>

Dimitry,
The windings may be ofset by 90 electrical degrees but in practice the inductance and the capacitance in the start winding puts the magnetic flux created by the start winding out of phase wiyh the flux created by the run winding. This is what gives the motor an artificial rotating field. The amount of phase shift between start and run winding is the product of the inductance and capacitance of the start circuit. 

Claude.
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, March 04, 2006 6:42 AM
Subject: Re: how deep do the coilers prefer doing it? : )



Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>

Hallo Claude,

two windings are not identical - so what? at nominal load you have
circular rotating field like in "true two phase motor" - single-phase
motor physically can`t have circular field - only pulsed or elliptic
one.
and windings are not out of phase with each other - their offset is 90
electrical degrees.
you can call it "asymmetric two-phase motor", but it`s steel two-phase.

> Original poster: "claudio masetto" <claudmas@xxxxxxxxxxxxxxx>

> It is still called a three phase motor because it has three identical
> windings, even though it is connected to a single phase supply.
> A single phase cap run motor is not a true two phase motor. It is a
> single phase motor designed to run on single phase with two windings
> which are not identical and are out of phase with each other.

> Claude.

>>Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>
>>
>>Hallo Claude,
>>
>>take real three-phase motor, arrange windings in star connection,
>>connect phase "a" to the hot wire, phase "b" to the neutral one, phase
>>"c" to neutral again in series with capacitor, the motor will run at
>>65-85% of its nominal power - "It is still considered a single phase
>>motor because it is connected to a single phase supply"?
>>: D
>>
>> > Original poster: "claudio masetto" <claudmas@xxxxxxxxxxxxxxx>
>>
>> > It is still considered a single phase motor because it is connected >> > to a 
>> > single phase supply.
>> > The phase relationship between the run and start windings is >> > different. 
>>
>> > It can be called a start or auxillary winding. I've seen it called >> > both 
>> > often.
>>
>> > Claude.
>> > ----- Original Message -----
>>
>> >  > Original poster: "Dmitry (father dest)"
>> >  >
>> >  > Hallo Claude,
>> >  >
>> >  > > Original poster: "claudio masetto"
>> >  >
>> >  > > Any winding in a single phase induction motor which is connected
>> >  > > directly accross  the supply is known as the run winding.
>> >  >
>> >  > cap run motor is not single-phase - it`s two-phase if you
didn`t > know.
>> >  >
>> >  > >  In a cap run motor a cap is connected in series with the start
>> > > > winding and this cap is called the run cap but the winding is >> > still 
>> >  > > called the start winding.
>> >  >
>> >  > no, this is not starting winding - it`s auxiliary winding.

-----
Let the bass kick! =:-D