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OverUnity Research > Build / Construction Tips and Ideas > Component & Circuit Recommendations > Delays
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Author Topic: Delays  (Read 5449 times)
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img  poynt99
Delays « on: 2010-04-30, 03:13:52 »

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It's not as complicated as it may seem...
 8)


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"Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe." Frank Zappa
   
img  Paul-R
Re: Delays « Reply #1 on: 2010-05-02, 15:25:48 »
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I do not understand delay circuits and need help on a matter relating to magnet motors.

How can we simply "hold up" a current for a small time, maybe 0.1 secs?
   
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Re: Delays « Reply #2 on: 2010-05-02, 15:34:04 »

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It's not as complicated as it may seem...
It depends on what is "driving" this magnet motor.

If it is pulsed, there are a few different ways to delay a pulse.

.99


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"Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe." Frank Zappa
   
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Re: Delays « Reply #3 on: 2010-05-02, 16:58:26 »
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Imagine a coil on a stator, and a passing ferrite core on a rotor (in the style of Robert Adams).

You pulse the coil to attract, and get a BEMF as the field collapses. This field will appear too
quickly to help out. If there is a delay, then as the rotor's core passes, it will get pushed by
the BEMF effect.

There is an additional effect involving the Lenz's Law induced field. If that can be delayed
by a small amount, the rotor's core will have passed an inch or so, and the Lenz reaction
will help to push the rotor rather than hinder.
 
   
img  szaxx
Re: Delays « Reply #4 on: 2010-05-03, 00:42:44 »
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Hi
Its generally accepted magnetic flow is as fast or faster than light this cannot easily be cheated. If the magnetic core of the pickup lost its pulling effect ie got turned off,  this is achievable and can be done using a saturable core. It requires a timed pulse to completely saturate the core. If the core is a ring this pulse is not seen by the outside magnetic field and is effectively turned off. Its shape may be end on so the required  winding is wound around the outside of the core with the saturating control winding wound through the centre of the torroid covering all the core material. If you use a clip on rfi suppressor like on computer mains leads you should find one of the required size. Search the internet for saturable reactors for more info and see if they are usable.
Hope this is of  use.
   
img  BEP
Re: Delays « Reply #5 on: 2010-05-03, 01:47:22 »
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Quote from: Paul-R on 2010-05-02, 15:25:48
I do not understand delay circuits and need help on a matter relating to magnet motors.

How can we simply "hold up" a current for a small time, maybe 0.1 secs?

Paul-R,

By 'delay' do you mean analog or digital?

The digital folks think they are delaying but they are actually using one signal to trigger another signal with a delay in the initiation of the secondary pulse.

In analog, there is only one signal and you increase the amount of time for it to go from point A to point B.

Since you use the term 'hold up' I will assume you meant analog.

.1 Seconds is a long time for analog. You can delay the magnetic field buildup, wrt potential buildup. Magnetic depends upon current, not voltage. In an inductive circuit current lags behind voltage. The problem is, the lag is only a fraction of the wavelength. Normal delay is 90 deg. after voltage. So, the delay times are tiny.



 
   
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Re: Delays « Reply #6 on: 2010-05-03, 11:43:32 »
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Quote from: WaveWatcher on 2010-05-03, 01:47:22
Paul-R,

By 'delay' do you mean analog or digital?

I think "analogue". I need the train to pull into the station, stop
for a few minutes, and pull out again.
   
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