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Post by Deleted on Nov 12, 2010 4:37:12 GMT -7
I'm new to HO drag racing so I have a few queries... I'll be using plastic track, probably Tyco (just because I have a lot of it) and I'm thinking of using a 24v power supply for each lane. This is the one I'm looking at cgi.ebay.co.uk/24-Volt-DC-Power-Supply-24v-Regulated-PSU-5-5mm-x-2-1mm-/290466149616?pt=UK_Computing_PowerSupplies_EH&hash=item43a121b4f0Now my worry is that having a high voltage would burn out the controllers, am I right in thinking this. I was thinking of only using cheap ones anyway, I wouldn't want to risk damaging the one and only Parma controller I have. Would running a motor basically designed for 12 volts, at 24 volts ruin the motor, or wouldn't it have chance to get too warm as to do any damage? |
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Post by ninjatek on Nov 12, 2010 12:14:08 GMT -7
I'm new to HO drag racing so I have a few queries... I'll be using plastic track, probably Tyco (just because I have a lot of it) and I'm thinking of using a 24v power supply for each lane. This is the one I'm looking at cgi.ebay.co.uk/24-Volt-DC-Power-Supply-24v-Regulated-PSU-5-5mm-x-2-1mm-/290466149616?pt=UK_Computing_PowerSupplies_EH&hash=item43a121b4f0Now my worry is that having a high voltage would burn out the controllers, am I right in thinking this. I was thinking of only using cheap ones anyway, I wouldn't want to risk damaging the one and only Parma controller I have. Would running a motor basically designed for 12 volts, at 24 volts ruin the motor, or wouldn't it have chance to get too warm as to do any damage? Welcome to Nitro Slots ukdragracer. The power supply you have selected is just barely borderline for running stock parts. The current rating is a little low. You may want to look for a power supply with more current available. Just my opinion but you may want to try to find something that has 18v to 24v with at least 2 amps per lane. This should bring the most performance out of stock parts. Check this link: www.hoslotcarracing.com/On the left hand side, scroll down to the heading 'ELECTRONICS', click the link 'Power & Wiring'. At these voltages and currents I don't see where any of your controllers would be in danger of damage. As HO drag races last only a matter of seconds (if your car is really slow) I don't think any significant damage to the motor results. I'm far from experienced with HO power supplies. These are my thoughts on the subject. Perhaps someone with more experience will chime in. |
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Post by Deleted on Nov 12, 2010 12:34:38 GMT -7
Like I said, I would be using one of these for each lane, that is 830 ma per lane. So not knowing much about electrics, are you saying that I need 2000 ma per lane (I'm presuming 2 amps is 2000ma?)
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Post by ninjatek on Nov 12, 2010 13:04:59 GMT -7
Like I said, I would be using one of these for each lane, that is 830 ma per lane. So not knowing much about electrics, are you saying that I need 2000 ma per lane (I'm presuming 2 amps is 2000ma?) That is correct. 2000ma = 2amps |
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Post by Bananasmoothie1975 on Nov 15, 2010 23:00:35 GMT -7
Look for a pair of matching (2nd hand) laptop power supplies, they're available in a variety of voltages and usually have 3 or more amps each. Just a cheap alternative  |
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Post by JW on Nov 16, 2010 7:58:10 GMT -7
To break in the 36 volt dragsters I use 30 volt HP printer power packs. First started to use them in place of the wall worts that came with track sets, one per lane should handle a 20ft track with no problems... well maybe not neo's.
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Post by Deleted on Nov 16, 2010 9:18:06 GMT -7
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Post by Deleted on Nov 17, 2010 11:46:17 GMT -7
I know it can be done with batteries but can two power supplies be wired to work together as I have an abundance of 12 volt, 1.1 amp power supplies at my disposal. I'm guessing if I could use two per lane I'd have 24 volts and 2.2 amp, right?
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Post by ninjatek on Nov 17, 2010 16:44:12 GMT -7
I know it can be done with batteries but can two power supplies be wired to work together as I have an abundance of 12 volt, 1.1 amp power supplies at my disposal. I'm guessing if I could use two per lane I'd have 24 volts and 2.2 amp, right? Not quite. A power supply cannot produce (or allow to pass) current much beyond it's rating without damage to the components within it. To acheive the increase in voltage and current you will need four power supplies per lane. You will need to series two power supplies to double the voltage. Then you need to parallel the series connected power supplies to double the current. See diagram below.  |
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Post by Deleted on Nov 18, 2010 15:56:46 GMT -7
So how many wires go to the controller...2 for each lane?
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Post by ninjatek on Nov 18, 2010 19:12:04 GMT -7
So how many wires go to the controller...2 for each lane? No matter which type of power supply used, there will be two wires going to each lane. On each lane one wire will have the controller in series leading to one of the rails. The other wire goes directly to the other rail of the same lane. This hook up is repeated for the other lane. To begin with, try wiring a lane using the two power supply set up. Test a car. If you think you need more current connect the second pair of power supplies in parallel (+ of one power supply to + of the other, do the same for -). When you are satisfied with one lane do the same for the other lane.  |
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