# RE: 24 Volt Motor theory help needed

• Subject: RE: [amsat-bb] 24 Volt Motor theory help needed
• From: "Andrew Rich" <vk4tec@xxxxxxxxxxxxxxxxx>
• Date: Fri, 2 Sep 2005 20:19:49 +1000

```Rotator up and running

24 Volt single winding , 10uF 40 Volt bipolar CAP

Thanks !

-----Original Message-----
From: kc6uqh [mailto:kc6uqh@cox.net]
Sent: Friday, 2 September 2005 2:27 PM
To: vk4tec@tech-software.net; Amsat-Bb
Subject: Re: [amsat-bb] 24 Volt Motor theory help needed

Andrew,
Something in the range of 10 to 100 uF, must be a motor run capacitor and
have a AC rating  greater than 40 Volts. The Value is dependent on the size
of the motor and provides for the max torque.
Suggest WW Granger or McMaster Carr as a source.

Art
----- Original Message -----
From: "Andrew Rich" <vk4tec@tech-software.net>
To: <vk4tec@tech-software.net>; "kc6uqh" <kc6uqh@cox.net>;
<vk4tec@tech-software.net>; "Amsat-Bb" <amsat-bb@amsat.org>
Sent: Wednesday, August 31, 2005 10:10 PM
Subject: Re: [amsat-bb] 24 Volt Motor theory help needed

> My motor has four poles, four wires three terminals
>
> one terminal is common and then there are two seperate terminals.
>
>
>> Thanks Art, any idea on cap size and voltage ?
>>
>>
>>
>> > Andrew,
>> > The common method uses a 2 phase motor. This requires 24 VAC and a
>> capacitor
>> > to shift the phase. The motor has two windings with one wire
> common
>> to both
>> > windings. 24 volts is applied to the common winding and the other
>> side
>> > connects to one winding and to the other winding with the
> capacitor
>> in
>> > series. the direction of rotation depends on which of the two
>> windings
>> > connects to the capacitor. The type of switching cricuit used can
> be
>> > simplified by using a 24-0-24 type of transformer, but it is not
>> necessary.
>> >
>> > Art ,
>> > KC6UQH
>> > ----- Original Message -----
>> > From: "Andrew Rich" <vk4tec@tech-software.net>
>> > To: "Amsat-Bb" <amsat-bb@amsat.org>
>> > Sent: Wednesday, August 31, 2005 8:06 PM
>> > Subject: [amsat-bb] 24 Volt Motor theory help needed
>> >
>> >
>> > > Hi,
>> > >
>> > > I have a 24 Volt AC rotator.
>> > >
>> > > Do i need a center tapped trasnformer that is
>> > >
>> > > 12-0-12
>> > >
>> > > or
>> > >
>> > > 24-0-24
>> > >
>> > > ????
>> > > ----
>> > > Sent via amsat-bb@amsat.org. Opinions expressed are those of the
>> author.
>> > > Not an AMSAT member? Join now to support the amateur satellite
>> program!
>> > > To unsubscribe, send "unsubscribe amsat-bb" to
> Majordomo@amsat.org
>> > >
>> >
>> >
>> >
>> >
>>
>> --
>>
>>
>>
>
> --
----
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```

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