Search found 979 matches

by larsb
Jul 18 2019 2:02am
Forum: E-Bike Technical
Topic: Programming APT AE96600 controller (UPDATE: don't buy..)
Replies: 105
Views: 3641

Re: Programming APT AE96600 controller (UPDATE: don't buy..)

the docs are available in a package when you buy the controller - or at a bunch of alibaba or aliexpress sites. Might be good to have them here also but i thought this thread was ready to die. I am convinced that this controller is not worth to invest in (for now) since a complete manual and stable ...
by larsb
Jul 17 2019 2:45am
Forum: Battery Technology
Topic: What do you think of this situation and how can I be safer?
Replies: 21
Views: 487

Re: What do you think of this situation and how can I be safer?

Individual enclosures would probably be the easiest in total, containing each 10Ah fire and gas is not so hard but at 100Ah scale it would be.
by larsb
Jul 16 2019 3:22am
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

Gears will make it possible to have a smaller motor for the same torque so in the end you won't need to add "an extra kilo" by planetary gears How much torque is actually needed for the prop? 1000W 1500rpm is about 6Nm if the numbers you have are correct A c80100 in 50kV will need about 32A to do th...
by larsb
Jul 14 2019 2:15pm
Forum: Motor Technology
Topic: Motor with ~10.000 rpm and >100kW peak?
Replies: 10
Views: 632

Re: Motor with ~10.000 rpm and >100kW peak?

i know i've read some threads in the past, all with motor/controller issues. It could be new sevcon users just not up to the adjustments, i don't remember..
by larsb
Jul 14 2019 7:26am
Forum: Motor Technology
Topic: Motor with ~10.000 rpm and >100kW peak?
Replies: 10
Views: 632

Re: Motor with ~10.000 rpm and >100kW peak?

I haven't seen succesful emrax builds. Maybe i don't find the right threads.. Care to link if you remember some?
by larsb
Jul 14 2019 5:21am
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

How will you build the enclosure? This seems like the most difficult part together with sealing cables and shaft.
by larsb
Jul 13 2019 12:58am
Forum: E-Bike General Discussion
Topic: DIY motor
Replies: 17
Views: 395

Re: DIY motor

Do as you wish, but I would recommend starting with an ebike-size of motor. Doing it with your own hands is worth a thousand words of advice. Great advice; full scale mistakes are expensive so making a smaller trial prototype before going for 10kW is smart. I'd do a version of the lebowski motor: i...
by larsb
Jul 12 2019 2:59pm
Forum: E-Bike General Discussion
Topic: DIY motor
Replies: 17
Views: 395

Re: DIY motor

you're getting too old here all of you - let him do his motor :D

it's possible if you've the right mind. And more fun to read about than a thousand QS motor builds.
by larsb
Jul 12 2019 2:37pm
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

at those power levels there's no need for active water cooling. just connect the inrunner stator to the casing with good heat path and use an efficient motor.
by larsb
Jul 12 2019 4:35am
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

It's a planetary gearset at the front of the motor on the pic.
by larsb
Jul 12 2019 3:21am
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

Better in this case to just buy one of the cyclone motors. plastic planetaries don't sound a lot, and i guess the PLE has (louder) metal planets and also needs adaptations to make it fit. I would like to avoid gearing if it is possible, because it is noisy, needs more maintenance Do you assume or kn...
by larsb
Jul 11 2019 5:32pm
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

I guess 99% of the drag comes from the rider so weight doesn't need to be critical? You can just add volume on the dpv? I think you should choose inrunner motor since cooling will be difficult on outrunners. So hub motors might be out anyway - even though there are small ones. EDIT: i understood the...
by larsb
Jul 11 2019 1:16pm
Forum: Motor Technology
Topic: Low KV 1000W BLDC
Replies: 29
Views: 588

Re: Low KV 1000W BLDC

Interesting application! You can underdrive any motor at lower rpm. Changing kV to get low rpm use and running on low rpm by low throttle is not so different, the full potential of the motor is not used in both cases. One way to get low rpm efficiently is by using a high pole count motor (often hub ...
by larsb
Jul 11 2019 2:49am
Forum: E-Bike Non-hub Motor Drives
Topic: Should a 8S cassete be a good option for e-bikes?
Replies: 14
Views: 347

Re: Should a 8S cassete be a good option for e-bikes?

I've used schwalbe marathon race 35mm tires on a road ebike (not always they fit the road frames though) for some 10000 kms It worked perfectly and has some cush to them for potholes. Smaller tyres below 30mm are too small to handle bad roads at speed ( if you're not in the giro :D ) 40mph is still ...
by larsb
Jul 10 2019 3:59am
Forum: E-Bike General Discussion
Topic: 26" Wheels on High Power Ebike (8,000w-10,000w)?
Replies: 29
Views: 844

Re: 26" Wheels on High Power Ebike (8,000w-10,000w)?

I've had 26" DH rims and 10kW into a shimano cassette hub for about 10 000 km so far. No issues. It's unbelievable that the hub has not disintegrated yet. Last crash bent the wheels, maybe moto wheels would've been fine in the same crash. Durability and life are a lot better with the moto wheels so ...
by larsb
Jul 10 2019 2:25am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 352
Views: 17288

Re: APL's DIY axial-flux motor

At 5mm it will have enough power to spin the test piece of aluminum below it, and at 1mm the drill will have a hard time turning it. What's the available torque on your drill? If it's a drill press then i think you need to do a sanity check if you should put more effort into the motor in this confi...
by larsb
Jul 08 2019 3:18pm
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 67
Views: 2764

Re: Hubmonster teardown

John don't let this new guy get under your skin. We all know how much you helped folks... Every person has the right to price items where they want with no explanation needed. The market itself will speak on price/value. I always enjoyed reading your threads back in the day as you were discovering ...
by larsb
Jul 06 2019 1:00am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 67
Views: 2764

Re: Hubmonster teardown

Sorry if you see it as spam and that you need to call me stupid. Maybe you don't connect the dots. The way it's been going in the EG threads on the hubmonsters is from him not knowing anything, being told by John what they are, EG reading Johns threads, EG starting to preach hubmonsters, to EG stabb...
by larsb
Jul 04 2019 12:03am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 67
Views: 2764

Re: Hubmonster teardown

BTW...there's 2 kinds of people in the world. There's professors that teach about African predators and biologists that work with and around those predators. It's a matter of involvement...I prefer to be the biologist. To be fair it seems that John who has been driving hubmonsters for years is the ...
by larsb
Jul 03 2019 9:42am
Forum: E-Bike Technical
Topic: Programming APT AE96600 controller (UPDATE: don't buy..)
Replies: 105
Views: 3641

Re: Programming APT AE96600 controller (UPDATE: don't buy..)

You set the speed for the mode the controller is in. Eco mode doesn't work for me but with a switch to the correct wires i can get mode 3,4&5
5 is boost mode, 3&4 what you set them at.
by larsb
Jul 01 2019 2:11pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1462
Views: 181168

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

why would you get higher drag? same steel, different copper wires, but they are not shorted.

Edit: ah, i see. You're comparing 1000w and 1500w version
by larsb
Jul 01 2019 2:08pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 86
Views: 7967

Re: Votol EM-100 & EM-150 controllers

It's the same. Have one of these also and there is no difference in original settings on mine
by larsb
Jun 30 2019 7:46am
Forum: E-Bike Technical
Topic: Programming APT AE96600 controller (UPDATE: don't buy..)
Replies: 105
Views: 3641

Re: Programming APT AE96600 controller (UPDATE: don't buy..)

I don't know.
I've run it at 200A for a long time and 250-300A just a short while. The controller is completely dead now as the program is corrupted and i have removed it from my bike so it will be a while before i try the new firmware.

200 to 250A equals 60% more heat so it's a big step..
by larsb
Jun 29 2019 2:03am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 67
Views: 2764

Re: Hubmonster teardown

i think vectorix may have made an early version with a hubmonster but i havnt found one yet. another 2 for the list would be- x-treme xm4000li x-treme xm5000li both look to have full size hubmonsters. these are basically the rmartin again. seems like different "brands" in USA etc have just ordered ...
by larsb
Jun 28 2019 10:43am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 86
Views: 7967

Re: Votol EM-100 & EM-150 controllers

It's set at max nominal 120A battery and 9960 phase (phase amp parameter setting and i guess this is also max nominal at 380A..) Votol doesn't seem to sell the "S" version anymore, now it's called "EM150-SP" by QS Difference is below (new/old): image.png image.png So it "only" delivers 380A phase now.