Search found 97 matches

by e-vektor
Dec 01 2018 11:13am
Forum: Items for Sale - New
Topic: Professional ESC base on VESC introduction
Replies: 61
Views: 4982

Re: Professional ESC base on VESC introduction

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...
by e-vektor
Nov 27 2018 4:20pm
Forum: Items for Sale - New
Topic: Professional ESC base on VESC introduction
Replies: 61
Views: 4982

Re: Professional ESC base on VESC introduction

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...
by e-vektor
Nov 26 2018 4:13pm
Forum: Items for Sale - New
Topic: Professional ESC base on VESC introduction
Replies: 61
Views: 4982

Re: Professional ESC base on VESC introduction

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....
by e-vektor
Nov 25 2018 8:32am
Forum: Items for Sale - New
Topic: Professional ESC base on VESC introduction
Replies: 61
Views: 4982

Re: Professional ESC base on VESC introduction

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
by e-vektor
Nov 15 2018 12:27pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 20 2018 6:38am
Forum: E-Vehicles General Discussion
Topic: Controller data logging and OSD
Replies: 12
Views: 2133

Re: Controller data logging and OSD

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...
by e-vektor
Oct 19 2018 4:40am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 17 2018 2:05pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 17 2018 6:59am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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
by e-vektor
Oct 15 2018 5:18am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 13 2018 4:01am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 12 2018 2:12pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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
by e-vektor
Oct 11 2018 2:58pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 09 2018 12:39pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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 ...
by e-vektor
Oct 08 2018 8:29am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 07 2018 2:08pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 06 2018 10:40am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Oct 05 2018 11:26am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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
by e-vektor
Oct 04 2018 1:50pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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

Image
by e-vektor
Sep 29 2018 2:38pm
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Sep 18 2018 10:10am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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%, ...
by e-vektor
Aug 14 2018 5:06pm
Forum: E-Vehicles General Discussion
Topic: Controller data logging and OSD
Replies: 12
Views: 2133

Re: Controller data logging and OSD

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 ...
by e-vektor
Jul 06 2018 5:49am
Forum: Motor Technology
Topic: Motenergy ME1304 motor with SEVCON size 6 on Dyno
Replies: 47
Views: 6239

Re: Motenergy ME1304 motor with SEVCON size 6 on Dyno

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...
by e-vektor
Jul 04 2018 3:32pm
Forum: E-Vehicles General Discussion
Topic: Controller data logging and OSD
Replies: 12
Views: 2133

Re: Controller data logging and OSD

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.

by e-vektor
Jul 04 2018 7:07am
Forum: E-Vehicles General Discussion
Topic: Controller data logging and OSD
Replies: 12
Views: 2133

Re: Controller data logging and OSD

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...