The truth about Capacitors!
I'll try to make this as simple and as useful as i can.
I have read plenty of misconception on this site about the use of capacitors for performance gains. First of all, replacing or adding capacitors to your motor will not make your car faster, in fact it will make it slower. A capacitor is an electrical storage device which discharges it's stored energy very quickly when presented with a load in which to discharge. If placed on the motor leads or directly on the motor itself it would have to use the energy which was intended to power your motor to charge the capacitor (which would take away from the energy that was intended for your motor in the first place). The capacitors that are already on your motor are intended to reduce "noise" produced by a brushed motor and to absorb peak transient voltages caused by counter emf which occurs at high speeds and when the power to the motor is suddenly cut off. Now for the slightly good part, there is a way to use capacitors for a slight performance advantage. If a capacitor is connected to the battery connection of the main board (and in this case bigger is better) the capacitor would be charged whenever the batteries are inserted and able to discharge on demand much quicker than the batteries themselves whenever the board demanded power (when you hit the gas). The gains would be small but from reading your posts most of you guys are looking for any advantage possible. A capacitor could be connected anywhere along the wires from the battery tray to the board but the closer to the board the better. |
nice...but I've got a better place for this :nod:
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great job zx9rbart explains it in good detail
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so if i took the capacitor (the little Orange thing with a number on it) off my motor would it go faster or just be really noisy
also i can put a capacitor on the battery wires to th eboard and it would be a slight performance boost |
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Truth about capacitor turbos on the motor? Indeed, read the thread
http://xmodworld.com/modules.php?nam...wtopic&t=20824 |
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I did some searches on your capacitor trick, and I learned alot. But I have a few questions.
1) If the capacitor is farther away from the board, what are the negative effects? I don't think it'd be too noticeable, unless you really know the powers of the capacitor your using, right? 2) The capacitor fills, and discharges, many times a second, is there a way that could cause jumpiness in response (lowering smoothness and control ever so slightly) or becuase its connected to the battery it would have nothing to do with it? 3) Say I wan't my xmod as smooth as a mini-Z, would putting capacitors on the battery, servo, and motor create excellent, smooth response? 4) Does the size of the capacitor create different filtering effects? I know that the bigger the one on the battery section would be better, but if you had a smaller one on the motor and servo would it still be able to filter as well or better then a bigger one, or is the bigger one better? I know putting a capacitor on the servo wouldn't do much, since its only being used when that particular function has battery power going through it (along with the motor) but it still should filter electrical noise on the servo motor. Also, would you be able to put a capacitor near the board by the servo and use that as a torque effect, and then have a capacitor up on the motor acting as a filtering effect. I guess I'm kinda asking the same question over and over again, but, I'm learing alot about this whole thing... Later, RedSXmodder |
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Realisticly, the only real advantage of a "turbo cap" would be at the board connection to the batteries.
Also, having a bigger cap on the servo and motor would help smooth out electrical noise, and cause smoother throttle response, and servo response, right? (I still don't understand your answer to that one) Or would it just filter noise, and leave it at that? Thanks for the other answers though! Later, RedSXmodder |
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Yep, I gotcha now.
The only usefull place for a capacitor is the batter connection to the board. I'll have to expiriment with this like you did... I want an xmod that can rival a Mini-Z's responce and smoothness... Later, RedSXmodder |
what about capacitors on motors?
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Read the **** thread!
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sorry, i have to sign off soon thats why, i wanted a quick explanation
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