Ok, see where I go wrong with this. Because your conclusion does not make sense to me.
I am a pre-service high school teacher so I will look at this like a highschool experiment.
There are 3 capacitors, I name them A,B,C.
Capacitor A has 1000uf capacity, 10 volts rating.
Capacitor B has 470uf capacity, 10 volts rating.
Capacitor C has 470uf capacity, 25 volts rating.
My controls are:
- 1000uf, 10 V for capacitor A
- 470uf for capacitor B and capacitor C
So the objective of this experiment is:
To test how different voltage ratings on capacitors affect ESR.
This done by first comparing the ESR of:
#1. capacitor A with capacitor B
#2. capacitor A with capacitor C
"On the table that is written on my ESR meter, a 470 uf, 10 volt capacitors ESR is listed as having double the ESR of 1000 uf 10 volt capacitor.
A 470 uf 25 volt capacitor has the same ESR as the 1000 uf 10 volts capacitor in the previous example."
I will translate that into:
Case #1: (Same voltage, Different capacitance)
470uf, 10 V capacitor has DOUBLE the ESR of 1000 uf 10 V capacitor.
Case #2: (Same ESR, Different voltage and capacitance)
470uf, 25V capacitor has the SAME ESR as 1000 uf 10 V capacitor.
Capacitor A has 2x the ESR of Capacitor B.
Capacitor A has the same ESR as of Capacitor C.
Am I correct?
Capacitor C has higher voltage ratings than Capacitor B.
Assuming that voltage and capacitance are the only two parameters affecting ESR, the conclusion I can draw from your ESR table is:
Lower voltage rating = Lower ESR.
(Which should be true. Can someone please comment to see if my interpretation is correct?)
You said that:
"That gives the conclusion that you get roughly the same ESR for given capacitance at the same voltage, no matter how many capacitors you've got."
I cannot see how you can draw your conclusions from your ESR table. Enlighten me please.
For everyone else who still have the paitence to read:
My question is simple, will additional resistance (due to wires, and solder joints) change the ESR value of a capacitor?
My next question is:
Which setup has more ESR?
setup#1 1x 1000uf,10V capacitor.
setup#2 10x 100uf, 10V capacitors in parallel.
Please give explaination!
Additional questions for the hardcore tekies out there:
How is ESR different from resistance?
Where does ESR come from?
What is factors affect ESR?
Thankyou all for taking the time to enlighten a lost newb in the rc world.