|
|
Post by mattsedgley on Dec 9, 2008 22:51:23 GMT
OK so following on from a range of threads we've had lately!
Anyone played with or know about 13.5 / 17.5 BL motors and their current draw?
I think the Nosram ISTC is capable of supplying 200A per coil - how close does a presumably more powerful 13.5 draw at maximum acceleration to the limit of 200A per coil??
Matt ;D
|
|
|
|
Post by lesbaldry on Dec 9, 2008 23:01:51 GMT
 ..why do you need to know?
|
|
|
|
Post by keitheroonie on Dec 9, 2008 23:16:25 GMT
I've just tested my 17.5 Novak and it's peak current draw was in excess of 140 amps under very heavy load (spinning the wheels on the spot with a fair bit of weight applied). I then put a current clamp around the positive battery lead and wizzed around the living room floor a bit, "peak current was 138.4 Amps" this was with a 3800 35c battery. I did the same test with an orion 3200 20c battery and peak current was 115.8 Amps The 13.5 tested with the "wizzing around the living rm floor" method (she's in Birmingham for the clothes show  ) results were as follows. Orion 3200 20c Battery: 184.3 Amps 3800 35c Battery: 191.4 Amps These results are peak readings, so may only happen for a fraction of a second. |
|
|
|
Post by Simon Crabb on Dec 10, 2008 0:12:15 GMT
Fascinating stuff Keith. I guess differences in the two packs are down to voltages?
|
|
|
|
Post by lesbaldry on Dec 10, 2008 8:09:23 GMT
Is your carpet Axminster shag pile or B&Q special..might alter the rolling resistance and influence the figuers some what! ;D LOL Sorry mate I had to do it  |
|
|
|
Post by keitheroonie on Dec 10, 2008 16:06:25 GMT
Axminster shag pile, isn't that a weekend activity for Devonshire folk ;D ;D
|
|
|
|
Post by lesbaldry on Dec 10, 2008 16:14:46 GMT
Axminster shag pile, isn't that a weekend activity for Devonshire folk ;D ;D Brill.. ;D ;D!!!!!...A group activity actualy. |
|
|
|
Post by keitheroonie on Dec 10, 2008 21:17:23 GMT
Fascinating stuff Keith. I guess differences in the two packs are down to voltages? Voltage yes! but the voltage stays higher only because the maximum output current is higher (c rating) I would expect an even higher rated battery would give an even higher "peak current reading" |
|
..why do you need to know?
) results were as follows.
