New Crystalyte Motor series (HT35 / HS35 and HT24 / HS24)

[nicobie]

Those are some decent holes nicobe!
Whats with your spokes though ? They look about as loose as Paris Hilton!

Hahahahaa... They do look loose don't they. I just checked and they are as tight as a**mod-edit***virgin.

I knew my bearing were bad because they started making weird noises that went away after I replaced them.

 

[Arlo1]

I built this bike for my brother Steven Its total cost is ~$1200 Including the charger! The total range is 30km on a charge that will cost about 8.5 cents! It uses 15 pacs of 5ah 4 cell lithium polymer for a battery that is easy to upgrade if and when something comes along. With a top speed of 85 km/h on flat ground and will cruise up the steep hills here in Nanaimo at 70-75 km/h and handles like a dream and stops on a dime with the 3 different braking systems incl. the regenerative brakes that give increased range of ~8.5% And weighs 74lbs! 11 pounds lighter then mine!


PS The most power full BWS Yamaha scooter I big bored to 70cc with a pipe clutching and reeds only made 3.98hp!


Here's the Dyno video! All I have left is to build the battery box and put lights on and hide the wiring!

[youtube]GUAa_01fFKk[/youtube]

 

[Arlo1]

I forgot to mention the toque is off by 6:1 because of the way the software calculates it. Which reminds me I have to see if its been updated lately!

 

[Bazaki]

Interessting video, was this with the HS3540 motor ? 20s lipo and how much max. amp did you run at the dyno ? I would like to know what the input power was at the time that it reads 4,80 HP. I don't think that the peak amp will count because, my controller always peaks half a second above 100amp although I set it to 80 amp.

Can we say that 4800 watt input power is about 4.8 hp ? 35% losses to heat.

 

[Arlo1]

Interessting video, was this with the HS3540 motor ? 20s lipo and how much max. amp did you run at the dyno ? I would like to know what the input power was at the time that it reads 4,80 HP. I don't think that the peak amp will count because, my controller always peaks half a second above 100amp although I set it to 80 amp.

Can we say that 4800 watt input power is about 4.8 hp ? 35% losses to heat.

There is going to be a current sensor added to the dyno software eventually. I had the limit in the CA set to 99amps So It will be very close to 100amps where the peak HP happened. The batteries were at full charge and did not drop past 80v from 84v fully charged. So really were are looking more around the 8000 watt input so more like 44.8% efficient at these power levels.
Bazaki what numbers did you use to get 4800 watts?

 

[gensem]

Arlo... Im really sad!!!! I was expecting to hit 4hp (2900w) using 18s lipo and 60 amp (4000w input). Bad HS3540 =(

 

[Arlo1]

Arlo... Im really sad!!!! I was expecting to hit 4hp (2900w) using 18s lipo and 60 amp (4000w input). Bad HS3540 =(

You have to remember its not rated for these power levels! I will post results later from 50,60,70,80 and 99 amp limits so you can see how the losses increase as you up the power!

 

[Arlo1]

This is also with stock phase wires.

 

[Bazaki]

Well, the Dyno video from Liveforphysics shows that 10kw input is about 10hp out, ( something like that ) 20-30-40 kw is all going up into heat.
I also was hoping that when running arround 4-6kw we had about 80% efficient.

If you like doing tests, I also wonder how efficient a normal ride is at 500 watt (35km/h ) or 1000 watt ( 50 km/h ) these are normal ebike input powers.
I would love to see some results

 

[Arlo1]

Lfps dyno video was with a rewond hs35 which is a lot different then stock!!!!

 

[Bazaki]

So our stock HS34 is much worse, if we had a list with input power and output power we can see till what point our motors run fine.

 

[Arlo1]

So our stock HS34 is much worse, if we had a list with input power and output power we can see till what point our motors run fine.

Its not so much a point it just gradualy gets worse as you up the power. I will try to do another set of runs I got a couple missing videos from last night. But I did see at 4000 watts its ~52% and 8000 its ~ 44% efficient.

 

[sn0wchyld]

So our stock HS34 is much worse, if we had a list with input power and output power we can see till what point our motors run fine.

Its not so much a point it just gradualy gets worse as you up the power. I will try to do another set of runs I got a couple missing videos from last night. But I did see at 4000 watts its ~52% and 8000 its ~ 44% efficient.

4000w= 2000 w space heater ? Damn. Time for liquid notrogen spray cooling.

 

[Arlo1]

So our stock HS34 is much worse, if we had a list with input power and output power we can see till what point our motors run fine.

Its not so much a point it just gradualy gets worse as you up the power. I will try to do another set of runs I got a couple missing videos from last night. But I did see at 4000 watts its ~52% and 8000 its ~ 44% efficient.

4000w= 2000 w space heater ? Damn. Time for liquid notrogen spray cooling.

IM uploading video right now. The peak torque is off by a ratio of 6:1 and you will be able to see each run and I recorded what the CA said during the whole run to be able to compare the amps and volts at the speed where HP occurs and I lowered the smoothing in the CA so the numbers react a bit faster as well so the video should be as accurate as I can provide at the moment! I do have the last few pieces for the roller for my BIG dyno at the machine shop right now!

 

[Arlo1]

Looks like 90amps at 84 volts is about where I would stop!

 

[Arlo1]

Here is the video and with it set at 99max In the video the best number I can see is 88.88 amps ar 80v so say we use those numbers its 7110 watts used from the battery for 4.76hp Making it 49.9% eficient! Im sure it hit close to 99amps but this is what we actualy see so.... Anyways heres the video [youtube]5SwHNBZOlmQ [/youtube]

 

[Planky]

Thanks for doing this Arlo it is fascinating stuff. Having empirical data is priceless.

This 49.9% efficiency is the efficiency whilst accelerating yes? So at a steady speed would your efficiency increase to the normal ~80% area?

 

[Arlo1]

Thanks for doing this Arlo it is fascinating stuff. Having empirical data is priceless.

This 49.9% efficiency is the efficiency whilst accelerating yes? So at a steady speed would your efficiency increase to the normal ~80% area?

If the steady speed was light load then you will have more efficiency But as long as the demand is for full power eg going up a hill at steady speed and full power then you will be at the low efficiency for a the whole time. Remember this is total system this includes losses in tire flex, phase wire resistance, controller resistance, bearing drag ect.

 

[Hyena]

Great data Arlo

Looks like 90amps at 84 volts is about where I would stop!

I wouldn't advise noobs even push it that far, not with a sealed motor. I pushed a stock sealed HS35 (in the interest of R&D) with 100a and 70v so similar peak power and significantly browned the windings +/- cooked a hall (not sure if the temp cooked the hall or it's a chewed through wire yet, haven't had a chance to check) At first I thought I'd straight cooked the windings until I found it still ran ok with a sensorless controller. So yeah, my recommendation would 5-6kw battery power input max for a stock motor and ideally drilled if you're planning to run at that power level.

 

[John in CR]

Arlo1,
Great info. At what rpm is it hitting peak power?

 

[Bazaki]

I'm wondering what a steady 500 watt and 1000 watt would do.
Did you also notice any difference when everything is cold vs hot ?

When my controller and motor are hot, I do notice less power.

Thanks for sharing !

 

[gensem]

Many many thanks Arlo!!!

You I be asking to much for you to do another run with lower voltage around 65v and 80 amps or something close...
Im guessing the efficiency will be better using the power.

BR

 

[Arlo1]

Many many thanks Arlo!!!

You I be asking to much for you to do another run with lower voltage around 65v and 80 amps or something close...
Im guessing the efficiency will be better using the power.

BR

Not right now. I need to finish other projects. Incl the battery box. As a rule upping the volts and lowering the amps gives better efeciency now I do understand that changes the speed as well but its something to know when picking a motor and wheel size.

 

[Arlo1]

Arlo1,
Great info. At what rpm is it hitting peak power?

Its right around 500rpm

 

[Arlo1]

I should point out that the test at 99 and 90 might both be limited by the parameter design settings in the controller it self. So if you want to compare efficiencies use 90, 80, 70, 60, and 50 amps!