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Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
27 car batteries in series? Nearly 5Kw at that voltage is an unquestionably lethal power supply, no matter how you do it. (I realise you may well know that, but the next person to read this thread might not.)
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
a small size-seriesed 320 volt battery of any chemistry will have low capacity and high ESR. So youll need a step-up SMPS or a lower voltage motor... thats just to get it working, youll still need to make sure the other details dont get in the way.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
There are other questions; how do I charge the battery? How do I afford this battery? (a 320 V servo motor is probably 320 Vac ... over 500 Vdc Bus voltage, or is it a d.c. servo motor?)
. the only three technologies that come to mind are; - Lithium cells - Silver-zinc cells - fuel cells and based on my (poor) knowledge of the state of the art, only Lithium cells seem do-able. Irrespective of the technology used, kW.h storage and re-charging are the main hurdles, the motor and inverter/drive decisions come later.
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
the 320V is the Bus voltage that will be inputted into the Driver. I suppose really that the Inverter would be the best choice to get up to the 320V. Ideally, this will all be used in an electric scooter or scateboard.
As for seeing the motor, i don't know when i get it and i don't know what one. but 320v and around 15Apk seems like the most likely motor for it to be.
Li-Po batteries do seem the best choice, likely 2x 5000mAh at the highest voltage i can get them. or any combination to get the best price per amount of energy stored. i can get up to 3kW ferrite transformers wound ( this will be more then enough as its likely around 15Apk, but i would imagine it being around 8A max in normal usage, judging by the general servo motors they have at the company that i would likely end up with)
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320V battery
