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Power surge


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#1 racerchaser96

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Posted 19 November 2017 - 05:28 AM

I have a 6 lane oval, about 20 foot long straights and 60 round on the top lanes. Problem I have is when 1 car falls off the other lanes seem to pick up that power and cause problems for the other cars. Is there a way to regulate the power. We run the track at low 9 volts.

John Greaves




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#2 MarkH

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Posted 19 November 2017 - 06:26 AM

It sounds like you could be short on total amp delivery for the cars you are running. If you are on variable power supply check to see if the amp supply does not drop as the volts go down.


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#3 Steve Ogilvie

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Posted 19 November 2017 - 08:33 AM

If you are running a transformer based power supply, you will get surging. Adding a battery to the circuit will solve this problem but then you will be running about 13 volts, well above the 9 volts you are running now.You could try to find an adjustable transistor switching power supply like a Bulldog or something. They do not surge. Or you could use your power supply in paralell with a 12 volt battery and then feed a power regulator and then feed your track.There is a thread about power regulation in the technical section with a diagram of how to make one.  The thread is called  Speed regulation for an 8 lane king track .


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#4 Ramcatlarry

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Posted 19 November 2017 - 01:45 PM

Typical problem when the power supply is too small for the track and cars.   Happened a lot in the 1960s.  

My standard power rules:

Homeset cars or track - 5 amps per lane (6 lane track= 30 amps output)

Rental/lite duty commercial track - 10 amps per lane (8 lanes X 10= 75-80 amps)

Cobalt motor Drag/Euro/wing cars - 25+ amps per lane & 2+ Farad capacitor


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#5 Steve Ogilvie

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Posted 19 November 2017 - 02:08 PM

The surging is caused by the AC transformer that most of these power supplies are based on. When the power supply is putting out 12 amps feeding 6 cars and one car falls off the transformer will keep feeding 12 amps to the remaining 5 cars for a few seconds after the deslot. Everyone suddenly goes faster when this happens. You could use a 100 amp power supply and still have the same problem if it is based on an AC transformer.


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#6 jimht

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Posted 19 November 2017 - 02:47 PM

Resistance in the circuit is always an issue, regardless...power tap every 20-25 feet.

 

On a track this size, split the positives and negatives so they are half the track apart-30 feet.

 

If the problem is still there, do it again-15 feet.


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#7 Phil Hackett

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Posted 19 November 2017 - 03:35 PM

Less resistance (Like JimHT just posted) & more amps from the power supply.


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#8 Pappy

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Posted 20 November 2017 - 07:27 AM

I don't know a lot about track wiring but as Jim said, more taps and maybe thicker wire. What gauge wire is your track wired with?
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#9 Mattb

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Posted 20 November 2017 - 07:58 AM

Amps was alwaysthe answer for me and I used a battery charger for power  for 20 years.  Just my experience.


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#10 racerchaser96

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Posted 20 November 2017 - 08:24 AM

Thanks for all the reply’s,


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#11 Bazzie

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Posted 01 December 2017 - 02:58 PM

Unregulated supplies will always do this. As Steve said, even if you have a 100A supply. A 12V battery will not solve your problem and a cap will just slow down the phenomenon. Eventually the voltage would still drop off. You need a regulated PSU


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