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General Category => General Discussions => Topic started by: 3Vz9Ycvx on January 30, 2010, 07:27:40 AM

Title: So who here is good at math?
Post by: 3Vz9Ycvx on January 30, 2010, 07:27:40 AM

I'm starting to really geek out on the numbers and terms - Watts, Amps, Volts, RPMs.

I'm psyched to get to work on my first eBike.

I also want to learn the math so I can better customize my ride.

Can anyone here direct me to a beginner's guide or a post or any place where I can get started learning what all the technical terms mean and how the math works (the basic equations and stuff to get me up and running)?

Much thanks in advance,

- Brett

Title: Re: So who here is good at math?
Post by: 3Vz9Ycvx on January 30, 2010, 08:18:17 AM

OK, so first I need to brush up on my metric measurements.

I just found out that the United States is one of only three countries (the others being Burma (Myanmar) and Liberia) that have failed to adopt the SI.

Very embarrassing. Please don't hold it against me.

About batteries:

They are measured in volts and amps.
An increase in voltage results in increased weight and increased power (push through the circuit, balls, guts, omph ... you get the idea).
The balance between weight and power is efficiency.

Am I getting this right so far?

Questions:

What affects efficiency in a battery? Are LiPoFe batteries more efficient than SLAs?
Can I control it in some way or is it part of the manufacturing process?
Are LiPoFe batteries more efficient than SLAs?

More to come ... please feel free to jump in ...

Best,

- Brett

Title: Re: So who here is good at math?
Post by: 3Vz9Ycvx on January 30, 2010, 09:22:26 AM

Here's a great primer on electricity using the "Hydraulic Analogy."

If you can understand water going through pipes, reservoirs and water wheels, you can understand just about any electrical component from a resistor to a diode to a capacitor and on and on ... pretty cool.

I'm still working my way through it, but I already understand volts and current (amperes) better.

http://en.wikipedia.org/wiki/Hydraulic_analogy

Title: Re: So who here is good at math?
Post by: 3Vz9Ycvx on February 01, 2010, 09:46:24 PM

Here's a handy little primer on electrical circuitry related to EVs:

http://www.efmotion.com/2010/01/electricity-for-non-electricians-ev.html (http://www.efmotion.com/2010/01/electricity-for-non-electricians-ev.html)