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Linix

Postby Burgerman » 13 Feb 2018, 16:23

Now. Everyone complains about sunrise ditching the AMT motors and using the chinese built Linix motors but they are good.

I just measured them rolling along a carpeted room at about 1.5mph at: 10.2 and 9.1 Amps each. Sounds a lot? That was of course motor amps. Battery amps was 4.1A total. At about 25% max speed.

This means that these are extremely low impedance motors so should be very efficient. If we do the math, thats about 19A drawn by two motors. And just 4A at the battery.

Lets say we can get only 50Ah from the 80Ah batteries. Thats 50Ah div by 4.1A or 12.2 hours at 1.5 mph. or 18.2 miles on carpet... Takes far less on concrete.
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Re: Linix

Postby expresso » 13 Feb 2018, 21:09

i think they are good also - smaller in size but seems to handle it and feels solid overall - i have about 2000 miles so far - this summer is going to be my third summer - meanwhile the older sunrise motors on my P222se - had to be replaced after 3 years i believe and i didnt do half as much with that chair as i did with this lithium chair once i did the battery - i was using it each day 30 - 40 miles for months first summer - i worn out the grey tires in a few months :)
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Re: Linix

Postby ICEUK » 13 Feb 2018, 23:20

I found them loud, sounds like a tram and they suck the ass out of my batteries that were replaced at same time.
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Re: Linix

Postby expresso » 13 Feb 2018, 23:28

yes thats true - they are louder than the previous motors - i got used to it i guess - - as for battery life with them - hard to say - i didnt feel they were any worse with lead before i went to lithium - depends on the lead battery i guess - mines where MK Gel 24 - brand new - used one summer - then went lithium
Quickie P222se - - 36ah ADD on pack -
Quickie S646se - - 105ah LifePo4 Pack + 30ah ADD ON - 135ah total
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Re: Linix

Postby Burgerman » 14 Feb 2018, 06:26

I know for a measured fact that they draw less battery amps and are lower impedance than the motors they replace by around 10 percent. By comparing both motor/battery amps as a fraction at stall, on both, (50A current is at a 10% lower motor voltage on linix) and by measuring actual battery amps as I drive at 1.5mph (25% speed) down my hallway with old/new.

If you get less range with these then look at your battery for the issue not the motors. Build quality? Remains unknown. But the sunrise rep told me they started using linix because they have the lowest warranty failure rate in the industry at under 1%. So if you believe her, then all good! On the other hand...
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Re: Linix

Postby hank » 14 Feb 2018, 10:25

Build quality? Remains unknown. ;)
Give you a few months running on the Linux motors john
tried and tested for your honest report on noise and quality :thumbup:
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Re: Linix

Postby Burgerman » 14 Feb 2018, 10:44

Sofar, electrically and efficiency is good. Measured. But noisier than AMT motors, but not bad at least these as they are new. But I never heard an old one thats as loud as say the EMD motors were. It all depends what you are used to. What will fail, as always, is the daft rubber cush drives... That I presume are in there.
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Re: Linix

Postby hank » 14 Feb 2018, 11:03

John
What i have found with the AMT ones they all use cheap metal shield
type bearings so run dry quick. :thumbdown:
Upgraded with SS quality rubber sealed ones.
On the gearboxes replaced the same but left the seal off one side
replaced with some quality swivel grease with a little ep 90 gear oil
mixed in which allows grease to get to now open bearings.
Lovely and quiet now. :thumbup:
f55s bm1 clone.
quickie groove Brushless
BM3 clone
Foldawheel PW 1000 XL.
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Re: Linix

Postby Burgerman » 14 Feb 2018, 11:37

The reason the motor manufacturers all use the shielded non sealed ones is that they can be oiled on assembly, and they then spin freely compared to rubber sealed grease filled ones. That improves motor efficiency, and when a company compares specs they sell on efficiency/price. So you might gain a couple of %. But they run dry soon enough, and get contaminated with carbon dust. So wear out faster. As an end user, you would of course prefer the rubber sealed greased for life ones to be in there as reliability means more than an extra couple of percent range. Same applies to casters on many chairs too.

As for gearboxes, you can buy semi fluid grease. Or top up with a little oil as you have. But here they are worries about warranty due to some leaking and so motors returned. So they use thick sticky greases.
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Re: Linix

Postby hank » 14 Feb 2018, 11:47

I understand with new ones on warranty issues :thumbup:
f55s bm1 clone.
quickie groove Brushless
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Foldawheel PW 1000 XL.
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