Search found 258 matches

by district9prawn
Oct 11 2019 6:54am
Forum: E-Vehicles General Discussion
Topic: Large drone motor for go kart
Replies: 15
Views: 435

Re: Large drone motor for go kart

The whopping pole count of 42 means you need a 50000 erpm capable controller just to spin the shaft at 2500 rpm. If you go through some old posts here you will find some tests on large Hobby King outrunners demonstrating extreme core losses at high speed. No idea if this is the case with T-motor but...
by district9prawn
Oct 10 2019 6:43pm
Forum: E-Bike General Discussion
Topic: Show me your front light(s)
Replies: 32
Views: 881

Re: Show me your front light(s)

How do you like the light pattern? Does it do a good job for you in fully dark situations at say 28 mph? Would a second one (800 lumens total) help? In complete darkness I'm not confident I could avoid all potholes etc at 28mph. More comfortable at 20 mph. Similar situation for off road. I'm sure a...
by district9prawn
Oct 10 2019 5:45am
Forum: E-Bike General Discussion
Topic: Show me your front light(s)
Replies: 32
Views: 881

Re: Show me your front light(s)

Just upgraded my front light recently to the following from Grin: Roxim X4 Ebike Light https://www.ebikes.ca/shop/electric-bicycle-parts/lights/roxim-x4-ebike-light.html I've been using that Roxim one for about two years now. Not the brightest light out there but a very sensible output for urban ri...
by district9prawn
Oct 10 2019 5:21am
Forum: EV Business World
Topic: Vedder VESC
Replies: 1
Views: 84

Re: Vedder VESC

I haven't used the maytech one but if it is anything like the Flipsky one it means the lid on the case has an O-ring. The pcb itself won't have any conformal coating and water can still track inside the case through the connectors and wires.
by district9prawn
Oct 02 2019 10:40pm
Forum: E-Bike Technical
Topic: Parallelling 2 Li-ion batteries with different internal resistance
Replies: 21
Views: 404

Re: Parallelling 2 Li-ion batteries with different internal resistance

What about ditching the extender pack bms and parallelling all the balance connections between the old pack and new. Effectively making one big pack controlled by the Bosch bms, which is presumably of higher quality than the one on the extender pack. It would require modifying the Bosch battery (whi...
by district9prawn
Sep 20 2019 7:05pm
Forum: E-Bike General Discussion
Topic: Analog Throttle/Brake -- ADC2 does NOT cut power to the throttle? What is wrong?
Replies: 1
Views: 87

Re: Analog Throttle/Brake -- ADC2 does NOT cut power to the throttle? What is wrong?

Unfortunately on the vesc the brake/reverse mode doesn't function as a cutoff. Instead the commanded motor output is the brake value subtracted from the throttle value. So if you do full throttle and half brake, you will get half throttle. Maybe when you hold both the throttle and brake, the throttl...
by district9prawn
Sep 19 2019 11:34am
Forum: Motor Technology
Topic: VESC - Can You Share Ground and Voltage Pins
Replies: 2
Views: 138

Re: VESC - Can You Share Ground and Voltage Pins

I use ADC1 for throttle and ADC2 for brake and splice into the gnd and vcc for the bluetooth.

In vesc tool are your adc voltages noisy and jump around a lot?
by district9prawn
Sep 18 2019 11:19pm
Forum: E-Bike Technical
Topic: Shorted sabvoton? is it dead?
Replies: 3
Views: 123

Re: Shorted sabvoton? is it dead?

Measure the resistance between each phase and supply positive and negative. If any are short circuit the mosfets on that phase are blown.
by district9prawn
Sep 15 2019 10:50pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 61
Views: 7105

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Did some stuff on the bike so time for an update. Had a chain drop recently. My fault as I was in a rush to adjust chain tension with the chain roller. Didn't loctite the new bolt and it came off a couple of weeks later. Unfortunately the chain jammed after falling off and the end of the shaft got b...
by district9prawn
Sep 15 2019 7:02pm
Forum: E-Bike Non-hub Motor Drives
Topic: Need a bombproof rear-hub that can handle 2500 watts
Replies: 11
Views: 506

Re: Need a bombproof rear-hub that can handle 2500 watts

I second the DT Swiss freehub body design. It has an axial ratchet system, that provides more surface area and engagement than most others on the market. They are very easy to disassemble and rebuild, since it's only 2 springs plus two of the ratchet rings, minus the splined cassette body. Only dra...
by district9prawn
Sep 05 2019 5:43am
Forum: Items for Sale - New
Topic: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers
Replies: 124
Views: 13639

Re: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers

Genchichik wrote:
Sep 05 2019 3:44am
I tried to connect, it doesn’t connect, I tried all the options, Asi says that the one who set up the controller somehow blocked it for writing (ERT) to end users.
If true that really sucks :( . Surely there is a way to restore the controller to default?
by district9prawn
Sep 01 2019 6:50pm
Forum: Items for Sale - New
Topic: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers
Replies: 124
Views: 13639

Re: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers

Genchichik wrote:
Sep 01 2019 6:40pm
because I can’t change the settings, bac is configured for 16 s battery only, but I want to use 20s, ERT does not support
Are you only saving the settings to ram in bacdoor? You need to save to flash as well if you want the settings to persist on reboot.
by district9prawn
Aug 29 2019 10:03am
Forum: E-Bike Technical
Topic: Opinions please: VESC - Vedder Electronic Speed Controllers
Replies: 10
Views: 382

Re: Opinions please: VESC - Vedder Electronic Speed Controllers

Price aside, I feel the vesc controllers don't make sense for DD hubs due to the lower voltage limit. Plus there are so many other controllers to choose from that work great with hubs. If you need sensorless or a very high erpm for your motor and the voltage limit is not a problem then it make more ...
by district9prawn
Aug 26 2019 10:25am
Forum: E-Bike General Discussion
Topic: General Inquiry from Oz
Replies: 21
Views: 578

Re: General Inquiry from Oz

If she only wants a little help for a few hundreds of meters uphill basically any motor shall do. She doesn't look heavy and she won't brake speed records. Why not just stay legal? A q100 or any other hub in an adequate winding shall get her up there. Totally agree. Also the steel frame and forks w...
by district9prawn
Aug 11 2019 8:46am
Forum: Stand-up E-scooters and E-skateboards
Topic: Electric Drift Trike RWD
Replies: 8
Views: 872

Re: Electric Drift Trike RWD

Then $15 dc converter (72v to 12v) went 72v on the 12v side and blew the 12v coil on the gigavac contactor. Lucky no other damage. Lesson learnt on fusing 12v side and sizing dc converter to FULL pack voltage 84v approx. I've also found that cheap chinese dc-dc converters have a nasty habit of pass...
by district9prawn
Aug 08 2019 7:21pm
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 139
Views: 20382

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

Wow fancy magnets! Is it very difficult installing them into the rotor?
by district9prawn
Aug 04 2019 1:42am
Forum: E-Bike Technical
Topic: MAC 10T Speed
Replies: 5
Views: 253

Re: MAC 10T Speed

The 40 kph given by the grin simulator is the maximum speed. No torque is produced at this speed. 32 kph is a more realistic top speed on flat ground.
by district9prawn
Jul 28 2019 7:45am
Forum: E-Bike Technical
Topic: Phaserunner TTL to USB converter : RS232 to TRS
Replies: 7
Views: 325

Re: Phaserunner TTL to USB converter : RS232 to TRS

Another option is a cheap 5v logic level usb serial module like one of these. https://www.ebay.com/itm/FT232RL-3-3V-5 ... SwrklVMjIp
by district9prawn
Jul 24 2019 7:34pm
Forum: Items for Sale - Used
Topic: [AUSTRALIA] Mac 10T rear hub in 700c rim. - SOLD
Replies: 0
Views: 192

[AUSTRALIA] Mac 10T rear hub in 700c rim. - SOLD

SOLD! For sale is a 10T Mac rear hub motor as the title says. I purchased it in 2014 but only did around 5000km on it as I went mid drive and also played around with other builds. Its the old style motor core so it has 0.5mm laminations and phase wires are not as thick as they are today. It takes a...
by district9prawn
Jul 20 2019 9:02am
Forum: Motor Technology
Topic: VESC - External status LED
Replies: 3
Views: 278

Re: VESC - External status LED

We are using Hall sensors ports, Canbus (CanH/CanL) and (5V/-/TX/RX). If you are using an off the shelf vesc then that only leaves the two analog throttle inputs and the servo input. I just gave it a go and compiled a firmware with fault and drive leds assigned to adc_ext 1 and 2 and it seems fine....
by district9prawn
Jul 20 2019 8:52am
Forum: E-Bike Technical
Topic: BBSHD ROTOR UPGRADE
Replies: 7
Views: 394

Re: BBSHD ROTOR UPGRADE

Good thing the magnets are embedded in the laminations :o
by district9prawn
Jul 15 2019 7:25pm
Forum: Motor Technology
Topic: VESC - External status LED
Replies: 3
Views: 278

Re: VESC - External status LED

I would reassign the led gpio pins in the hw configuration files. If you need to change some functionality of the red and green leds they are controlled in main.c

Also I'm assuming you are posting this question here on endless sphere because the vesc-project forum is down?
by district9prawn
Jul 13 2019 7:34pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 61
Views: 7105

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Haven't updated this thread for a while but I haven't made any changes to the bike other than switching to 12s as that pack has the high capacity cells now that I need to travel a bit further every day. Without field weakening top speed is just under 60kph which is still ok. Recently the levers on m...
by district9prawn
Jul 05 2019 7:16am
Forum: Items Wanted
Topic: [AUS] Cheap hub motor
Replies: 6
Views: 438

Re: [AUS] Cheap hub motor

Does it have to be direct drive? I'm about to list a rear mac hub for sale here.
by district9prawn
Jul 01 2019 3:42am
Forum: Motor Technology
Topic: Flipsky Vesc cannot run 5 kw Golden BLDC motor
Replies: 1
Views: 205

Re: Flipsky Vesc cannot run 5 kw Golden BLDC motor

I see a red flashing led on your flipsky vesc. Usually that indicates a fault code which you can view by clicking Terminal at the top then print faults.

The detected inductance value looks reasonable so the hardware itself is probably ok.