Endless Sphere

The spec increases seem too large to me for the skate industry to want to get involved, I think that size needs to be thought of here and most people will only need no more than 20s and 100amp battery, that would still be double the size of those existing units so in theory it would be better for a...

Trampa Boards has just released a VESC for 75V (66V real / safe) and 300A continuous. For me it is a little unbalanced as it would be better having more voltage and less current (for ebike application), although for some motorcycles with small motors maybe ok BTW: 100A battery is huge!, 100V? Is the...

Is there anyone, benjamin vedder or other company, developing a 100 v model? I am using 4.2 on ebike and it is superb, but I miss a 75 v PCB to operate my cyclone motor I'm working on a 12F VESC-compatible that can run up to 80V. It will use 100V mosfets, but the current sensors are limited to 80V....

Is there anyone, benjamin vedder or other company, developing a 100 v model? I am using 4.2 on ebike and it is superb, but I miss a 75 v PCB to operate my cyclone motor

Offtopic: Testing an ebike with Cyclone 3000W motor and VESC (50V, 60A limit) on dyno: comparison of FOC (2.2 KW / 3 HP) vs BLDC (1.7 KW / 2.3 HP). It seems like the battery current limit is applied to BLDC mode (flat section), but not to FOC mode (any ideas?) http://www.sportdevices.com/uploads/pic...

after too long waiting for PCBs we already have the definitive version, with DC/DC converter (24v to 5V) and two CAN inputs (same bus), one non-isolated for SEVCON/Curtis, and the other Isolated for BMS (sorry for the bad hand soldering, production parts will be done at oven) http://www.sportdevices...

looks very promising, but I like the original Sevcon SpeedApp EV more, which I recently bought from hsct in the dutch. it also shows how many kilometers or miles you can drive off your battery. https://photos.app.goo.gl/iFWFLU41ZmKM5np76 It sounds good, do you have more information? involved hardwa...

and with http? (instead https) http://www.sportdevices.com/uploads/pics/ME1304_40HP.png here is a video with the GM (induction) motor: PES5hT-3nF0 it is basically a truck eddy current brake (small size, less than 1000 N*m) with two semi-axles installed and connected to the motor with sprockets and a...

sanfox wrote: ↑

Oct 17 2018 6:02am

E-vector, please repost your latest pictures in smaller screen, it's not opening.

cannot open those links?

https://www.sportdevices.com/uploads/pi ... 4_40HP.png

ME1304 has 8 magnets (4 poles). It's possible to try to rise up headroom factor to 95%. The field wekeneeng must begine to work when headroom factor reach up set value. You can get 10% plus power if you encrease headroom factor. ok, I'll try next Monday. Today I expent almost all day charging the b...

Can you make test of rated power of your motor? An example, can you rotate your motor about 15 minutes at half of maximum power? Wow, it is complicated. No enough battery and no coolling yet. At the moment it gets hot in seconds I will do a log when I test it in the kart. Mainly for temp What batte...

sanfox wrote: ↑

Oct 12 2018 10:45am

Can you make test of rated power of your motor? An example, can you rotate your motor about 15 minutes at half of maximum power?

Wow, it is complicated. No enough battery and no coolling yet. At the moment it gets hot in seconds
I will do a log when I test it in the kart. Mainly for temp

ME1304 has 8 magnets (4 poles). It's possible to try to rise up headroom factor to 95%. The field wekeneeng must begine to work when headroom factor reach up set value. You can get 10% plus power if you encrease headroom factor. ok, I'll try next Monday. Today I expent almost all day charging the b...

As I understand sevcon's Ke use electrical radian per second speed vs usually uses mechanical angular velocity. Ke.JPG ah, ok. It makes sense if I do the calculation for W rad dividing by 2 (4 poles?) and Veff / 2, it shows about 0.031, but it is approximated when reviewing old logs the Ke changes ...

66 mH vs 69.9 mH seems ok Ke=0.021 vs 0.029 has more discrepancy. I measured the Ke value with DVT (VCI 3, Tool 25.6, Tcl patch level: 8.5.18) how should I verify Ke? it is supposed to be the V RMS voltage / rad/s, isn't it? For instance (95V / 1,42) / 5000 RPM / (60 / 2 PI) ? (if 5000 RPM is reache...

What coefficients do ME give? Ke was measured using the DVT tools I plan to use combined cooling water plus air. I have calculated heat dissipation and deside that additional air cooling can give for me minimum additional 6 kW of rated power (15 kW+6kW=21 kW minimum or more). Now I have no time tо c...

yes, about 84%. It is likely the modulation index does not reach its maximum at max power value, then it continues increasing but torque decreases first quickly (I guess before F.W.) and then more slowly (I guess during Field Weakining) Parameters: http://www.sportdevices.com/uploads/pics/ME1304_par...

sanfox wrote: ↑

Oct 05 2018 8:20am

Why controller can't hold max power from 3500RPM to 5000RPM?
Can You make test for max power at long time period?

indeed that makes me think that we could get a slower decay between 2500 and 4000 and this will provide more power (maybe 5 HP more) since the torque decay is SLOWER after 4000 RPM

Update: we continued adjusting the P.I. and F.W. constants and got 37 HP at brake with battery just charged at 100V (approx 40 HP at motor)
I think this is very very close to maximum for this motor at 100V

Yesterday I did several more tests with the 4S x 3P set (max 480 A DC @ 10C), but results were exactly the same. At the beginning I though the SEVCON was limiting the battery current to 285 - 300 A DC, then I increased the limit to 500 A, but no change at all. As you said in a previous post this mot...

I am back again to the testing. After my friend luigidesign finished his tests in the dyno he has been adjusting my SEVCON for the ME1304 motor. Efficiency has been improved a lot at low torque areas. It reached about 86% at the brake (after the chain), and I estimated the losses of chain about 6%, ...

I finally got some time to record a video with my OBDII simulator adapted to the CYCLONE e-bike kit (mine is the 3000W model, same as yours). Cyclone controller sends a 16 byte frame 4 times per second at 9600 baud. My simulator reads all frames and stores the last values, and attends to the mobile ...

according to the second picture (ME13004 120V 660A) I should expect about 37 HP at 100V (100.4 battery pack at full charge), which is quite good. By now I am doing tests at 90-92V, but 100V will work too with SEVCON, and I got about 29 HP, so 35-37 does not seem too far I am waiting my friend #luigi...

that's great! but does this app work only for ASI Controllers?

evolutiongts wrote: ↑

Jul 04 2018 3:23pm

I am using ASI Controllers with built in bluetooth and the mobile app for data logging and it exports as a excel file.

It can data log virtually every parameter including temp and rpm. Throttle and regen position.

Member " nuxland." Has a very nice data logging and display system on his ekart .. https://endless-sphere.com/forums/viewtopic.php?f=34&t=68543 yes, but as far as I know it is something he customised for his kart. The point of this is that having a very small PCB (about 30 x 30 mm) you can use your...