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Post by Paul Lenihan on Feb 20, 2018 20:05:44 GMT
Hi all,
We have two questions to ask which are below. Any help would be appreciated:
- Is the 1kw limit specific to the rated power of the motor? or can we use a motor rated for more than 1kw (e.g. 3kw) and limit power to 1kw? (The 1kw limit could be proven with wattmeters)
- If the maximum voltage allowed is 24v, is that the maximum nominal voltage battery we can use? (therefore when fully charge it would output around 26v)
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Post by Admin on Feb 26, 2018 20:55:19 GMT
Hi Paul
Thanks for your questions, the team are working on a response and will get back to you shortly.
Admin
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Post by Admin on Mar 12, 2018 23:29:13 GMT
Hi Paul
Apologies for the delay, your questions were great and needed our team of experts to think creatively about an answer. Apologies for the delay.
To answer your questions I am going to reference the updated technical regulations that will be on the website ASAP.
Vehicles competing in the Open Class (previously 1Kw rated motor) can use any motor with batteries not to exceed a nominal voltage of 48V. Team will be provided with a thermal overload switch appropriate to their battery choice (0 to 24V is 100A overload, 24V to 36V is a 50A overload, 36V to 48V is a 40A overload). Teams inform EVolocity of their battery specification to receive their thermal overload switch.
Does that help?
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Post by madscientist on Mar 26, 2018 7:45:15 GMT
SO I have a question on top of this, Thanks for the Information If I wanted to run a 24V motor at 100Amps, then the Batteries, the ESC, and motor need to able to handle 100Amps, right??? I can find Plenty of R/C ESC that can handle this sort of rating for Brushless Motors (Students and I are trying something fun) but cannot seem to find either SLA or LiPo batteries big enough to run it for long enough. What do you suggest?  can you link some suggestions. |
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Post by Admin on Apr 3, 2018 8:54:47 GMT
Hello, thanks for your question Yes controller, motor and supply will need to be rated/capable of handling the design. LifePO4 batteries that are rated for that delivery (100A) are available from AA Solar in Auckland, or via the many Chinese suppliers. There are plently of (wet) Pb batteries that will do it too, but they won't be small, or light. Storage capacity is a different thing, this is what governs how long a battery will deliver a specific current for before the battery falls below a pre-determined voltage. In other words this is, within reason, how long you would be able to operate your vehicle for using that battery. A battery with a higher amp/hour (Ah) rating will last longer for a given current draw than one with a lower Ah rating. There are excellent articles on line that will explain this well. I would suggest a thorough read through www.batteryuniversity.com in order to gain further understanding |
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Post by Isaac Kirkwood on Apr 30, 2018 22:52:35 GMT
So does this mean I can use a 2000watt motor on 48volt as long as the current does not go over 40amps peak?
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Post by Admin on May 3, 2018 0:43:25 GMT
Yes :-)
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can you link some suggestions.