We've been seeing a (frustrating) pattern with MP's the last week or so.
We installed a new pie with
Internal controller yesterday(48V), set the max continuous to 30A and max peak to 50A.
We are only able to get 15A(1/2 of max), and we
know it's not the
BMS in the battery pack, because they are known/tested by us, good to 35A+. We reprogrammed to 15A max and could then only get 6.5A out of it, so the MP controller seems to be limiting at half of
programmed max amps.
Then, just today, another customer called to tell us he was climbing a moderate hill and that the max he was getting was 8-12A as well, and his new trike stopped climbing; his is set up similarly at 25A/35A. This install is with an
External GM controller. We finished this install with him just last week. These systems both have Cycle Analysts and we've trained the riders on how to use them. This customer needs this trike as he is unable to walk any distance.
What's going-on with the GM controllers? Are they being limited to avoid warranty failure? Are they being current-limited to try and stay at or below 20mph? This might work on the flats, but we're hilly, and current-limiting isn't going to cut it for us. And if this is the case
and nobody from GM bothered to notify us of this change....arrgghh
I have customers who
rely on their trikes and who, for various reasons, are unable to walk, easily or at all, so this change has major impacts for my customers who we told would have powerful, reliable motors to get them over the hills and back-roads to home again.
To me these are product FAILURES, as my expectations of programmability and flexibility of max Amp flow are no longer met, and I was not informed these would be limited in any way. The MP motors I have now in stock are virtually useless to me.
What's up Golden Motor?
Anybody else seeing this pattern? When did you first see it? 15.5Amps limit?
To reiterate, with recent Magic Pie II's, we're experiencing current-limiting to max of 15.5 Amps run at 48V,
which just happens to be at 20mph. This is with both
Internal and
External 'Magic' Controllers; Something tells me the Magic has gone....
Songs keep running through my head....Good Theeing, Gonna mess up a good theeinng.....
R
