Search found 20 matches

by Malloot
Sep 19 2018 2:04am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6923
Views: 716166

Re: New "TSDZ2 Torque Sensor Central Motor"

Hey, I am looking to build 2 bikes with this motor after seeing the fact that you guys developed a open source firmware for it. This seems like absolutely fantastic work and is a mayor bonus for this product, thanks to all involved! One of the bikes is for in the Netherlands, for a flat 15km commute...
by Malloot
Jun 26 2015 3:09am
Forum: E-Bike Technical
Topic: Power / Torque Sensor Roundup
Replies: 43
Views: 12338

Re: Power / Torque Sensor Roundup

There is a Chain tension sensor, Called Beam TS sensor Haven't seen them sold anywhere and it seems rather fragile Torque Simulation controllers are sold by BMSbattery, no idea how they work and if it really is as good as a real one. I do not think it is possible as it would still need a rotation s...
by Malloot
Jun 25 2015 4:56pm
Forum: E-Bike General Discussion
Topic: Wave Ebike another Indiegogo backed Alibaba quality bike
Replies: 39
Views: 6449

Re: Wave Ebike another Indiegogo backed Alibaba quality bike

One look at the rack's angle tells me this was designed by idiots looking to make a cash grab. Thanks for the compliment! :roll: I am actually one of the founders and have to say that people have really been hating on the sloped rear design of the rack, so we finally decided to change it to be more...
by Malloot
Jun 25 2015 6:58am
Forum: E-Bike General Discussion
Topic: My workshop (by popular demand)
Replies: 13
Views: 2415

Re: My workshop (by popular demand)

Sick shop man! that is very well layed out. Love the retractable racks with tools on it that are strong enough to do actual work on. One thing that could be better is to put all of this in a container, then you have a moveable do it all diy shop forever :) Actually might not be a bad idea to make yo...
by Malloot
Jun 25 2015 6:11am
Forum: E-Bike Technical
Topic: Power / Torque Sensor Roundup
Replies: 43
Views: 12338

Re: Power / Torque Sensor Roundup

Yeah there is a rather big lack of information about torque sensors and setups on this site. Most people seem to be happy with there throttle setup or standard rotational pas. This sort of makes sense if you want a high power setup or don't want to work yourself. But if you have ever ridden a good t...
by Malloot
Jun 24 2015 9:35am
Forum: E-Bike General Discussion
Topic: My fast road DH Comp - 2.5kwh 18650's/Mobipus/QS V3
Replies: 49
Views: 8414

Re: My fast road DH Comp - 18650's/MaxE/Cromotor

Nice build man, glad to hear you are okay after the crash As far as i can see there are no lights on the bike, maybe put those on to make sure you are a bit more visible? I know people in cars have a hard time seeing bikes in the first place and you are quite allot faster then they might anticipate....
by Malloot
Jun 24 2015 5:56am
Forum: Battery Technology
Topic: Custom Bosch / Yamaha battery
Replies: 35
Views: 11089

Re: Custom Bosch / Yamaha battery

Without opening the pack, you can't tell what the configuration is. It will be 10S almost certainly, but the parallel configuration will depend on the cells used. It could be 4P, it could be 5P with 2200mah cells (which, if I had to guess, I'd say is more likely - most commercial packs use the chea...
by Malloot
Jun 23 2015 10:31am
Forum: E-Bike General Discussion
Topic: Leaf motor Build/Questions
Replies: 48
Views: 4030

Re: Leaf motor Build/Questions

I'd say its a shame for the cycle life and capacity of the pack to make a 60 amp pack that you are hardly going to use if you plan to drive 30mph. make a pack yourself that can handle a current that stays within reasonable specs. For example make a pack of 3200mah Samsung INR18650-32E or LG LG INR18...
by Malloot
Jun 23 2015 6:55am
Forum: Battery Technology
Topic: 48V configurations - versatility -
Replies: 17
Views: 1241

Re: 48V configurations - versatility -

were do you guys get the bargain bin and scavenged 18650's from? And is it really worth it? With 2900 mAh cells going for about 2.40 euro's per cell you should have a much easier time making time making properly controllable packs that will probably outlast the scavenged packs. I understand the idea...
by Malloot
Jun 23 2015 6:42am
Forum: Battery Technology
Topic: Samsung 30Q INR18650-30Q 3000mah 15a cell
Replies: 244
Views: 49100

Re: Samsung 30Q INR18650-30Q 3000mah 15a cell

Extremely interesting data! Thnx allot for doing these tests! Just goes to show how much the charge&discharge routine can change the life cycle of cells, would be very cool to continue these tests for more cells to get a indication of a optimal charge routine for these cells. I have seen calculation...
by Malloot
Jun 22 2015 10:04am
Forum: E-Bike General Discussion
Topic: Mando Footloose (e-bike without a chain)
Replies: 21
Views: 1984

Re: Mando Footloose (e-bike without a chain)

I rode these, there absolutely horrible You peddle and it goes, so far so good. Then you notice that if you peddle harder it sort off feels like its slips, that apparently was the dynamo engaging. So when you have the slipping feeling it is generating energy. However the cadence and power needed to ...
by Malloot
Jun 20 2015 2:22am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1558
Views: 217757

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

Don't buy one without an efficiency graph. A lot of companies are using that case these days, but are selling you a shitty 80% efficient version, negating the entire benefit of this motor. You know, i've never bought anything of alibaba or aliexpress for a reason. Those sites are seas of crap produ...
by Malloot
Jun 19 2015 5:53pm
Forum: E-Bike Technical
Topic: Struggling to understand consequences motor rpm
Replies: 31
Views: 3366

Re: Struggling to understand consequences motor rpm

It is better to measure losses in Watts than in percent, it confuses less. Current makes loss, voltage helps efficiency. We have to look at it as the complete system, not only motor side. 100V*3.6A=360w, 90% efficiency, only 36W heat. Same power as 36V, less heat. 200V*2A=400w, 95% efficiency, only...
by Malloot
Jun 19 2015 8:41am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1558
Views: 217757

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

Hey, I am seeing these things pop up all over Aliexpress for much less then on Leafbike.com i am pretty sure this is the same motor. What do you guys think, is it the same one? http://www.aliexpress.com/item/High-Quality-48V-500W-brushless-gearless-hub-motor-Electric-bicycle-rear-wheel-motor/1673284...
by Malloot
Jun 19 2015 8:25am
Forum: E-Bike Technical
Topic: Marathon Plus Tour, not so flat less...
Replies: 31
Views: 4624

Re: Marathon Plus Tour, not so flat less...

Really do not know how you broke 2 front forks, but the flat is just bad luck mate. Like i said, use the roadstar compound schwalbe tires and inflate properly and you will not get more flats then on a Vespa. A Vespa should get way more flats because of the rather large surface hitting the road compa...
by Malloot
Jun 18 2015 5:56pm
Forum: E-Bike General Discussion
Topic: Assistance required, you opinions needed!
Replies: 18
Views: 1404

Re: Assistance required, you opinions needed!

In the Netherlands it's legal if below 250Watt and PAS stops at 25km/h. Throttle only allowed till 6km/h. Anything else is considered moped. There's an in between class. This is still 250Watt limit, but is allowed to go up to 45km/h. This requires registration. The bikes are certified by the factor...
by Malloot
Jun 18 2015 10:54am
Forum: E-Bike Technical
Topic: Oil cooling your hub- NOT snake oil!
Replies: 608
Views: 113276

Re: Oil cooling your hub- NOT snake oil!

Wouldn't the coolest (pun intended) way of doing this be using a refrigerant, make it about a quarter full with a refrigerant that evaporates at around 20 degrees Celsius. That way it will take allot of heat from the stator when evaporating and will then slowly condensate on the shell. This would pr...
by Malloot
Jun 18 2015 10:27am
Forum: E-Bike Technical
Topic: Marathon Plus Tour, not so flat less...
Replies: 31
Views: 4624

Re: Marathon Plus Tour, not so flat less...

Actually in my experience stuff does go through Marathon Plus tires quite easy, it usually just isn't long enough to actually penetrate. However after many years in Amsterdam as a bicycle repairman i have see many strange things going trough tires, but especially long pyramid shaped pieces of glass ...
by Malloot
Jun 18 2015 10:10am
Forum: E-Bike Technical
Topic: Struggling to understand consequences motor rpm
Replies: 31
Views: 3366

Re: Struggling to understand consequences motor rpm

Your case is actually quite simple, you just need data to know how much it will matter. lets say that you have a 26 inch wheel with a 2 meter Circumference. Making 25 km/h about 208rpm Lets say motor 1 is the high speed one, it has a efficiency of 85% at 400 rpm loaded and a 75% efficiency at 200rpm...