VCR motor to generator

Discussion in 'General Electronics Chat' started by don'tknow, Feb 5, 2015.

  1. don'tknow

    Thread Starter Member

    Feb 5, 2015
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    :( how to make a generator out of vcr brushless motor? is that even possible?
     
  2. MaxHeadRoom

    Expert

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    Practically all P.M. motors will generate if spun, voltage directly relative to rpm.
    Max.
     
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  3. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    But a BLDC motor will give an AC voltage.
     
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  4. don'tknow

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    Feb 5, 2015
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    Thank you for your replies. The thing is, i have this VCR motor, (Vcr Head) it has all i need for this project but it doesn't generate el.
    my english is bad so i will use simpler words , i hope thats not a problem.
    1. my plan is to build a magnetic V rail wheel to spin this generator, V rail will be build directly on the head of this motor..
    my problem is, I don't know how to make this motor generate electricity. i saw some examples but that's not what i need. i need the magnets to spin ( not the coils) everything has to be on its place (bearings etc) was looking around for that and nobody did that. I believe it is possible .. but . . i am an amateur when it comes to that. All i have now is this vcr Head. what to do to make this head generate power. . ? sorry for this idk how to ask better.

    I know almost every motor can be used as a generator , but this one is something else.. and I know it must be possible since there are magnets spining around the coils .. but I don't know how to make that happen. what do i need ? ( just don't say another hobby ;) i never got an answer on that one so far.. hope dies last .. right ,, :(
     
    Last edited by a moderator: Feb 6, 2015
  5. MaxHeadRoom

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    It sounds like you have an 'Outrunner' as the RC crowd call them, you may even be able to run it on a RC motor drive, just a PWM in from a 555.
    Max.
     
  6. Reloadron

    Active Member

    Jan 15, 2015
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    I may be wrong on this but if your VCR Head Motor looks like this:

    VCR Head Motor.png

    Then it would be a 3 phase generator. The cover on the lower right is a ring magnet with alternating magnetic poles. There are nine coils on the left the magnets pass over. The trick is finding the 3 wires that exit as seen on the left. When spun the head is a 3 phase delta generator generating an AC signal whose frequency is a function of the rotational speed. From there the 3 phase AC can be passed on to a 3 phase rectifier network (6 diodes) and you get DC out. This is my guess anyway. The motor is the same motor found in CD and DVD drives but a much larger version. This is my guess anyway.

    Ron
     
  7. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    a motor that runs at slower speeds would be abetter choice. To get a useful voltage level out(5-12 volts), requires a very high RPM.
     
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  8. don'tknow

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    Feb 5, 2015
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    maybe you already answered me but like i said.. i'm a total amateur. :/ all i have is this. ( folowing picture ) can it be a generator if i spin it with nothing else than my hand ? without any incoming power at all.

    my has 8 coils and same magnet ring like on that one Ron. maybe works the same , but idk. i wanna thank you for your time . i'll try to learn some more about it. if i mak i'll come back and share it with you. hope i'll succeed.

    my plan is to increase the voltage ( whatever i get out of it ) and i will use that high voltage for the kick i need . idk how to explain what i want to make. , I guess have to learn english before .
     
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  9. MaxHeadRoom

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  10. don'tknow

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    my Also has this circuit board on it. and idk.. i'm starting to lose interest but i need it.. never mind if i'm to complicated no hard feelings :)

    and it has that magnetic switch i think (on the rotor) .. can that switch work without power input ? can it work while the wheel makes it's own power? thank you all I really apreciate.
     
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  11. MaxHeadRoom

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    Probabally a sensor for tach/rpm control, back to the controller board.
    Max.
     
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  12. tcmtech

    Well-Known Member

    Nov 4, 2013
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    I am getting a possible scent of an attempt at a overunity motor here.

    Magnetic V rail... High voltage fore kick I need... Motor powers itself.

    Could be poor wording but me thinks maybe not. :eek:
     
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  13. Reloadron

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    Jan 15, 2015
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    The circuit board is part of the control. I have a small one sitting here from a CD/DVD deck. They also do have hall effect (magnetic) sensors used to pickup the speed. You need to look closely at the coils and how they connect to each other and where they exit like in the image I posted.

    Ron
     
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  14. don'tknow

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    Feb 5, 2015
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    This is an example of what i'm trying to do. as you can see it's not finished yet. (you know my problem :) i managed to get some solid speed with those magnets (V rail ) you see in the first picture. then If I manage to get Anything out of that "generator" , voltage will be increased with .. (picture 2 ) that high voltage will be used for ( and now my english speaking comes and gets me. .) i think you al know how those magnetic V rail wheels work, so.. high voltage will be used for the kick to continue the spin.. i hope you understand what's this about.

    Thank you all for your time really. you did help me, i hope i'll find this out , let's hope it's going to work.. :)

    coils on this one are ending on 5 points.
     
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  15. don'tknow

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    Feb 5, 2015
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    They are connected .. 1-7 8-6 5-4 3-2 and they exit on 5 points.. damn.. this is hard via this..
     
  16. don'tknow

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    Feb 5, 2015
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    should i rewind it with another wire .. this one looks suspicious . :/ this one has red coating on if that means anything.. maybe not ood for generating . idk

    ok i got this.. i found where they end.. and now like i said.. they end on 5 points.. what should i do next?
     
    Last edited by a moderator: Mar 21, 2015
  17. Reloadron

    Active Member

    Jan 15, 2015
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    That's strange, 5 points? Lets see you have 8 coils so maybe a 2 phase brushless motor rather than 3 phase. If you have an ohmmeter look at the 5 points you see and see if you can't find two pairs that show continuity.

    Ron
     
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  18. don'tknow

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    Feb 5, 2015
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    ok. thank you Ron, i will do that. but right now i messed something up.. tried to connect the coils diferent way.. and ... long story short i need some more nerves and another motor... just a quick question, what if I connect the coils 1,2,3,4,5,6,7,8.. North south North south... do you think it will work that way? if not. i need another motor.. i hope this thread will not get old to fast . . i'm not giving up. coming back soon. 3 days top.
     
  19. Reloadron

    Active Member

    Jan 15, 2015
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    OK, well that is a bummer. No, don't rewire the coil arrangement, I am not sure that will work.

    Ron
     
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  20. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Your extra wire may come from a speed control regulation circuit. To keep the VCR synchronized with the tape.
     
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