very fast switching circuit

Discussion in 'General Electronics Chat' started by blessing mega, Dec 20, 2014.

  1. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    Please I need a quick switching circuit acting like a change over
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Two way switch from Home depot!! :rolleyes:

    Any more information?:confused:
    Max.
     
  3. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    Yes such that it takes 1 manor seconds to change over
     
  4. Alec_t

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    Sep 17, 2013
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    Do you mean 1 nanosecond?
     
  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    NanoSecond, microsecond?

    Manor second?

    Maybe if you tell us what you want to switch over. Your bedroom lights, a little motor, a big motor, a high speed communications system.
     
  6. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    An a.c induction motor
     
  7. ian field

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    Oct 27, 2012
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    About how long the manor will last with this one tinkering!!!
     
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  8. MaxHeadRoom

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    Many other factors involved, e.g. motor to load inertia ratio, this is where rate of acceleration/deceleration is required in order to calculate required capacity of supply etc.
    Max.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Another issues is how do you intend to slow the induction motor in order to reverse, external braking or by 'Plugging' the motor via power reversal?
    Actually plugging may achieve what you are looking for, all depends on the motor and application.
    http://www.electrical4u.com/induction-motor-braking/
    Max.
     
  10. Alec_t

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    Why would you want to switch an induction motor in 1 whatsitsecond?
     
  11. MikeML

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    Would you want to reverse an induction motor in less than tens of seconds?
     
  12. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    That is because I want to change it's power source
     
  13. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    The main idea is this, one power source is use to power my a.c electric motor so I want to change to another power source so that the load the the electric motor is powering is not affected.
     
  14. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    How big the motor?
    Motor is AC induction motor?
    What voltage?
    How long after the first power source is switched off will the motor spin due to inertia before you connect the second power source?
    If the first and second power sources are AC, are they the same voltage and phase at the moment of switchover?

    Methinks you are in way over your head...
     
  15. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    Datz y I need a change over
     
  16. MaxHeadRoom

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    Jul 18, 2013
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    'Instant' reversal on a 3 phase induction motor is called 'plugging' the motor, how and when it is done depends on the HP and inertia involved, it can be very stressful on both motor and mechanics connected to motor.
    More is required in the way of motor size and/or gearing and mechanism involved.
    Max.
     
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  17. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    It is a single phase motor
     
  18. wayneh

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    Sep 9, 2010
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    Read it again. I don't think he wants to reverse the motor, he wants to switch power sources seamlessly. Power ORing.
     
  19. MikeML

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    I'm done with this thread. I ask five simple questions, and get nothing that answers any of them in your reply!
     
  20. blessing mega

    Thread Starter New Member

    Dec 20, 2014
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    So sorry, it is a 1.5hp a.c motor
     
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