Hi Andrew,
brumbrum said:
Hi both, serves you both right for trying to be clever by going sensorless. It seems that you pay a bit of price on the speed front. Scorpion, Ginge is meant to be building me a battery pack at present so i'm chasing him from forum to forum with gentle reminders
Yes that plan did backfire didn't it ?
But at least I'm moving. But it's no harm to have a sensorless controller on backup.
Is Ginge building you a lipo pack ?
brumbrum said:
I cannot help with the 120% setting problem you have been having, but i would like to congratualte you on your lipo success. I spent yesterday afternoon reading your 14 page Lipo thread, and i learned a lot. I'm currently in the place you were on page one of the thread
Thanks, I'm using LiPo for around 6 months or a little more now and no smoke or fire yet! I don't store it in the house!
One of my 4s packs is a bit short on capacity, I'm thinking of changing it as the extra capacity will be nice on a longer run.
You do really need to keep an eye on voltages and not allow them to go too low, sometimes I miss a bms but really 100-200 euros is a lot to spend on something that you can do yourself with a little extra effort.
I'm still getting the same capacity out of the pack so I should easily get 2 years out of it which isn't bad considering building a LiPo pack is the cheapest way to go, LiPo also takes up a lot less room than LiFeP04.
brumbrum said:
I must get myself a Mac sometime in the near future. I currently have a Pie on one build and a GM mini motor on another, both running well here in S.Wales.
Yeah the mac is really an addictive motor, especially on 16S LiPo, it's got so much power all the way to the top, My clutch did break though, I don't know if the bmc v4 clutch will be much of a benefit if the keyway will be the next weakest link, I'm waiting for cell-man to get back to me which could take a while, he is due back tomorrow and I'm sure he will have tonnes of e-mails!
12S LiPo will still give you 25-28 mph and a 12S 10ah LiPo pack is really small, when you compare it to LiFePo4.
If you get a mac I recommend no more than 2500 watts on 48 volts, you will still get 28-30 mph easily with the controller set to 120% speed which cell-man supplies with all those settings programmed and you can get the switch from him too. The gear problem seems to be sorted now, so we will see what can be done about the clutch!
I had 0 issues with heat,but climbing steep hills full throttle will make it get very hot much quicker than a large direct drive motor. If you only travel on level ground with only a few small hills then I doubt you will have issues with heat.
Mark