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    oky I know sure that it's a DC series wounding motor. but why the schematic is two sections not one section ?

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    Quote Originally Posted by iugmoh View Post
    oky I know sure that it's a DC series wounding motor. but why the schematic is two sections not one section ?
    Not quite sure what you mean.
    Most any motor can be wired at least two different ways, there will be combinations for voltage and rotation. Providing a couple of the common hooks with the motor is normal for most manufactures.

    This motor could be manufactured for an OEM, the OEM may put their own tag on and that tag may not have the same information as the manufacture would.

    The voltage still bugs me. Most DC motors like this are 90 or 180 volt. If it is an OEM...

    If I were you, I would take the motor to a re-wind shop. There they can test and label the leads and tell you all you want to know about it.

    Just be careful with DC voltage that high. In my opinion it is more dangerous than AC. Before a bunch of people start debating that I will say other than a personal ZAP or two, with AC there is the zero crossing thing. If you are lucky, that is when you can break free. DC has zero, zero crossing. Now I will get off the soap box

    If it really is a DC motor and you need help with a driver, let us know.
    Dave
    Always wear safety glasses while programming.

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    oky today I made some expeiments on the motor, I opened it and I determined the the two wires connected to brushes to be the armature coil using digital multimeter, then also determined the two wires for the field coil, then I connected them on series and applied DC voltage and it rotated without any problems, but the strange thing is the other two wires rest I don't know for what they are , I measure the ohm resistance between them which is 0.8 ohm but between the armature about 5.6 ohm and between the field 2.9 ohm , and also the cross sectional area of the armature and field are the same but for the other two wires (0.8 ohm ) is lesser than the armature and filed wire.

    I applied a small voltage on these two wires (0.8 ohm) but this make sparking.
    I measured the DC voltage and ac voltage between them during rotation of motor but the reading always is zero.

    so what may be the purpose of these two wires ?

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    Quote Originally Posted by iugmoh View Post
    so what may be the purpose of these two wires ?
    Back lighting?

    Seriously...it might be that you have to apply a small voltage to one of these wires in order to get a tach output from the other one... Who knows...

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    may be, but I think that this motor is for a vechile and there was a controller to control each whell alone , my be these two wires is to control any wheel to to stop it inorder to stop one and rotate one to change the direction of vechile. the strange thing also in these twol wheels is when I rotate any of these two wheels in any direction the other rotate in the oposite direction.
    Last edited by iugmoh; - 11th August 2008 at 17:22.

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    Quote Originally Posted by iugmoh View Post
    may be, but I think that this motor is for a vechile and there was a controller to control each whell alone , my be these two wires is to control any wheel to to stop it inorder to stop one and rotate one to change the direction of vechile. the strange thing also in these twol wheels is when I rotate any of these two wheels in any direction the other rotate in the oposite direction.
    Not strange...normal. There's like an open differential in between the 2 just like most rear wheel drive automobiles...

    And the whole direction changing thing is most likely NOT done inside the motor.

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    Quote Originally Posted by iugmoh View Post
    may be, but I think that this motor is for a vechile and there was a controller to control each whell alone , my be these two wires is to control any wheel to to stop it inorder to stop one and rotate one to change the direction of vechile. the strange thing also in these twol wheels is when I rotate any of these two wheels in any direction the other rotate in the oposite direction.
    sory I mean by this when I rotate by hand but when apply dc voltage the two wheels are rotated in the same direction

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    Quote Originally Posted by iugmoh View Post
    sory I mean by this when I rotate by hand but when apply dc voltage the two wheels are rotated in the same direction
    Which is exactly the way an 'open differential' on a rear wheel drive car works.
    Google it...

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    Quote Originally Posted by iugmoh View Post
    so what may be the purpose of these two wires ?
    I still think there is a good chance it is a compound motor.
    http://www.joliettech.com/connections_dc_motors.htm
    and yes the motor might turn with out the series winding hooked up, and yes if you applied voltage directly to these lead it very well could become skimasks backlight

    Here is some fun reading, the second half is DC.
    http://www.reliance.com/mtr/mtrthrmn.htm
    Dave
    Always wear safety glasses while programming.

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    Quote Originally Posted by mackrackit View Post
    I still think there is a good chance it is a compound motor.
    http://www.joliettech.com/connections_dc_motors.htm
    and yes the motor might turn with out the series winding hooked up, and yes if you applied voltage directly to these lead it very well could become skimasks backlight

    Here is some fun reading, the second half is DC.
    http://www.reliance.com/mtr/mtrthrmn.htm
    You may well be right! Time to disassemble and inspect to see what he has, I hope he has some experience with brushes and commutators.
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